diff --git a/build/contracts/BETokenMall.json b/build/contracts/BETokenMall.json
index 1f0bb28..f68f4f7 100644
--- a/build/contracts/BETokenMall.json
+++ b/build/contracts/BETokenMall.json
@@ -56,6 +56,12 @@
           "internalType": "uint256",
           "name": "amount",
           "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "tokenAmount",
+          "type": "uint256"
         }
       ],
       "name": "BuyTransaction",
@@ -382,9 +388,9 @@
       "type": "function"
     }
   ],
-  "metadata": "{\"compiler\":{\"version\":\"0.8.10+commit.fc410830\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_tokenAddress\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_seller\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"erc20\",\"type\":\"address\"}],\"name\":\"AddERC20Suppout\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"buyer\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"tokenAddress\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"currency\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"BuyTransaction\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"erc20\",\"type\":\"address\"}],\"name\":\"RemoveERC20Suppout\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"seller\",\"type\":\"address\"}],\"name\":\"SellerUpdated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"tokenAddress\",\"type\":\"address\"}],\"name\":\"TokenAddressUpdated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"currency\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"price\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"pricePre\",\"type\":\"uint256\"}],\"name\":\"UpdateTokenPrice\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"erc20\",\"type\":\"address\"}],\"name\":\"addERC20Support\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"currency\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"buyToken\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"erc20Supported\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"executor\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"feeToAddress\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"prices\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"erc20\",\"type\":\"address\"}],\"name\":\"removeERC20Support\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"seller\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_feeToAddress\",\"type\":\"address\"}],\"name\":\"setFeeToAddress\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"tokenAddress\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"updateExecutor\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_seller\",\"type\":\"address\"}],\"name\":\"updateSeller\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_tokenAddress\",\"type\":\"address\"}],\"name\":\"updateTokenAddress\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"currency\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"price\",\"type\":\"uint256\"}],\"name\":\"updateTokenPrice\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"buyToken(address,uint256)\":{\"details\":\"Buy token\"},\"constructor\":{\"details\":\"Constructor\"},\"owner()\":{\"details\":\"Returns the address of the current owner.\"},\"renounceOwnership()\":{\"details\":\"Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner.\"},\"transferOwnership(address)\":{\"details\":\"Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner.\"},\"updateExecutor(address)\":{\"details\":\"update executor\"},\"updateSeller(address)\":{\"details\":\"Update seller address\"},\"updateTokenAddress(address)\":{\"details\":\"Update token address\"},\"updateTokenPrice(address,uint256)\":{\"details\":\"Update token price\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"project:/contracts/market/BETokenMall.sol\":\"BETokenMall\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/access/Ownable.sol\":{\"keccak256\":\"0xba43b97fba0d32eb4254f6a5a297b39a19a247082a02d6e69349e071e2946218\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://fc980984badf3984b6303b377711220e067722bbd6a135b24669ff5069ef9f32\",\"dweb:/ipfs/QmPHXMSXj99XjSVM21YsY6aNtLLjLVXDbyN76J5HQYvvrz\"]},\"@openzeppelin/contracts/security/ReentrancyGuard.sol\":{\"keccak256\":\"0xa535a5df777d44e945dd24aa43a11e44b024140fc340ad0dfe42acf4002aade1\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://41319e7f621f2dc3733511332c4fd032f8e32ad2aa7fd6f665c19741d9941a34\",\"dweb:/ipfs/QmcYR3bd862GD1Bc7jwrU9bGxrhUu5na1oP964bDCu2id1\"]},\"@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"keccak256\":\"0x287b55befed2961a7eabd7d7b1b2839cbca8a5b80ef8dcbb25ed3d4c2002c305\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://bd39944e8fc06be6dbe2dd1d8449b5336e23c6a7ba3e8e9ae5ae0f37f35283f5\",\"dweb:/ipfs/QmPV3FGYjVwvKSgAXKUN3r9T9GwniZz83CxBpM7vyj2G53\"]},\"@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol\":{\"keccak256\":\"0xec63854014a5b4f2b3290ab9103a21bdf902a508d0f41a8573fea49e98bf571a\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://bc5b5dc12fbc4002f282eaa7a5f06d8310ed62c1c77c5770f6283e058454c39a\",\"dweb:/ipfs/Qme9rE2wS3yBuyJq9GgbmzbsBQsW2M2sVFqYYLw7bosGrv\"]},\"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\":{\"keccak256\":\"0x909d608c2db6eb165ca178c81289a07ed2e118e444d0025b2a85c97d0b44a4fa\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://656cda26512ddd7373c2d5551c8fae759fc30f05b10f0fc2e738e9274199dbd4\",\"dweb:/ipfs/QmTSArSzQRFbQmHgq7U1PZXnsDFhvDZhKVu9CzMG4yo6Lx\"]},\"@openzeppelin/contracts/utils/Address.sol\":{\"keccak256\":\"0x006dd67219697fe68d7fbfdea512e7c4cb64a43565ed86171d67e844982da6fa\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://2455248c8ddd9cc6a7af76a13973cddf222072427e7b0e2a7d1aff345145e931\",\"dweb:/ipfs/QmfYjnjRbWqYpuxurqveE6HtzsY1Xx323J428AKQgtBJZm\"]},\"@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0xe2e337e6dde9ef6b680e07338c493ebea1b5fd09b43424112868e9cc1706bca7\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6df0ddf21ce9f58271bdfaa85cde98b200ef242a05a3f85c2bc10a8294800a92\",\"dweb:/ipfs/QmRK2Y5Yc6BK7tGKkgsgn3aJEQGi5aakeSPZvS65PV8Xp3\"]},\"project:/contracts/market/BETokenMall.sol\":{\"keccak256\":\"0xad7cdcaf9659e5e4c7af8596154cd2de28e0fdc53495ed5dcf5b7899d05dc6b0\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6432d9c3f00bc344e2be5e355a72ee93259fa72976ac5013d4a87405a41c7a66\",\"dweb:/ipfs/QmRtwet7QoCg8yEk5aGDTw2eUZCgRLNZTYvJ9C2EiFom1M\"]},\"project:/contracts/market/MallBase.sol\":{\"keccak256\":\"0x21e5909f6a86d62b20ebbc92171e8f87638f1c34e35ec88768181b7c4271de65\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://c487dd4637521c4e8c11697f5a9acb5188770dc89334b1ea72e2ce5058f605ab\",\"dweb:/ipfs/QmSakyzDfsYCX6VHsVfGrzuwXHWhq8PNxuMkafS1yjREhq\"]},\"project:/contracts/utils/UInt.sol\":{\"keccak256\":\"0xabf10d6f1fd47ffe04ab44b8b2f6638eece2276c3a8ba170d0c660e8212a7a8c\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://b2b1d61926fb315a771d8fd0d5d9a85ea58a154cd976a7500e12a1e2b3e14083\",\"dweb:/ipfs/QmbJkytTjjABgWbYLJBHv3uoLEAcbF7pWig71sd2rjGG2M\"]}},\"version\":1}",
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+  "metadata": "{\"compiler\":{\"version\":\"0.8.10+commit.fc410830\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_tokenAddress\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_seller\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"erc20\",\"type\":\"address\"}],\"name\":\"AddERC20Suppout\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"buyer\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"tokenAddress\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"currency\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"tokenAmount\",\"type\":\"uint256\"}],\"name\":\"BuyTransaction\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"erc20\",\"type\":\"address\"}],\"name\":\"RemoveERC20Suppout\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"seller\",\"type\":\"address\"}],\"name\":\"SellerUpdated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"tokenAddress\",\"type\":\"address\"}],\"name\":\"TokenAddressUpdated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"currency\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"price\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"pricePre\",\"type\":\"uint256\"}],\"name\":\"UpdateTokenPrice\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"erc20\",\"type\":\"address\"}],\"name\":\"addERC20Support\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"currency\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"buyToken\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"erc20Supported\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"executor\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"feeToAddress\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"prices\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"erc20\",\"type\":\"address\"}],\"name\":\"removeERC20Support\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"seller\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_feeToAddress\",\"type\":\"address\"}],\"name\":\"setFeeToAddress\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"tokenAddress\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"updateExecutor\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_seller\",\"type\":\"address\"}],\"name\":\"updateSeller\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_tokenAddress\",\"type\":\"address\"}],\"name\":\"updateTokenAddress\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"currency\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"price\",\"type\":\"uint256\"}],\"name\":\"updateTokenPrice\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"buyToken(address,uint256)\":{\"details\":\"Buy token\"},\"constructor\":{\"details\":\"Constructor\"},\"owner()\":{\"details\":\"Returns the address of the current owner.\"},\"renounceOwnership()\":{\"details\":\"Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner.\"},\"transferOwnership(address)\":{\"details\":\"Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner.\"},\"updateExecutor(address)\":{\"details\":\"update executor\"},\"updateSeller(address)\":{\"details\":\"Update seller address\"},\"updateTokenAddress(address)\":{\"details\":\"Update token address\"},\"updateTokenPrice(address,uint256)\":{\"details\":\"Update token price\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"project:/contracts/market/BETokenMall.sol\":\"BETokenMall\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/access/Ownable.sol\":{\"keccak256\":\"0xba43b97fba0d32eb4254f6a5a297b39a19a247082a02d6e69349e071e2946218\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://fc980984badf3984b6303b377711220e067722bbd6a135b24669ff5069ef9f32\",\"dweb:/ipfs/QmPHXMSXj99XjSVM21YsY6aNtLLjLVXDbyN76J5HQYvvrz\"]},\"@openzeppelin/contracts/security/ReentrancyGuard.sol\":{\"keccak256\":\"0xa535a5df777d44e945dd24aa43a11e44b024140fc340ad0dfe42acf4002aade1\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://41319e7f621f2dc3733511332c4fd032f8e32ad2aa7fd6f665c19741d9941a34\",\"dweb:/ipfs/QmcYR3bd862GD1Bc7jwrU9bGxrhUu5na1oP964bDCu2id1\"]},\"@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"keccak256\":\"0x287b55befed2961a7eabd7d7b1b2839cbca8a5b80ef8dcbb25ed3d4c2002c305\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://bd39944e8fc06be6dbe2dd1d8449b5336e23c6a7ba3e8e9ae5ae0f37f35283f5\",\"dweb:/ipfs/QmPV3FGYjVwvKSgAXKUN3r9T9GwniZz83CxBpM7vyj2G53\"]},\"@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol\":{\"keccak256\":\"0xec63854014a5b4f2b3290ab9103a21bdf902a508d0f41a8573fea49e98bf571a\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://bc5b5dc12fbc4002f282eaa7a5f06d8310ed62c1c77c5770f6283e058454c39a\",\"dweb:/ipfs/Qme9rE2wS3yBuyJq9GgbmzbsBQsW2M2sVFqYYLw7bosGrv\"]},\"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\":{\"keccak256\":\"0x909d608c2db6eb165ca178c81289a07ed2e118e444d0025b2a85c97d0b44a4fa\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://656cda26512ddd7373c2d5551c8fae759fc30f05b10f0fc2e738e9274199dbd4\",\"dweb:/ipfs/QmTSArSzQRFbQmHgq7U1PZXnsDFhvDZhKVu9CzMG4yo6Lx\"]},\"@openzeppelin/contracts/utils/Address.sol\":{\"keccak256\":\"0x006dd67219697fe68d7fbfdea512e7c4cb64a43565ed86171d67e844982da6fa\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://2455248c8ddd9cc6a7af76a13973cddf222072427e7b0e2a7d1aff345145e931\",\"dweb:/ipfs/QmfYjnjRbWqYpuxurqveE6HtzsY1Xx323J428AKQgtBJZm\"]},\"@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0xe2e337e6dde9ef6b680e07338c493ebea1b5fd09b43424112868e9cc1706bca7\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6df0ddf21ce9f58271bdfaa85cde98b200ef242a05a3f85c2bc10a8294800a92\",\"dweb:/ipfs/QmRK2Y5Yc6BK7tGKkgsgn3aJEQGi5aakeSPZvS65PV8Xp3\"]},\"project:/contracts/market/BETokenMall.sol\":{\"keccak256\":\"0xc25f7cc2cce5487dbf9a7dee96582caaf978b32b7fa0a5aa560383fc56c5c0dd\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://f1f91ac58de9e1303bcbb53f78ce47ed20b77d494060c23967665332d9084633\",\"dweb:/ipfs/QmNeu56W7NeX5G1tkrHmyxEBGVLkZMvFTkjzRU59oyjCL6\"]},\"project:/contracts/market/MallBase.sol\":{\"keccak256\":\"0x21e5909f6a86d62b20ebbc92171e8f87638f1c34e35ec88768181b7c4271de65\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://c487dd4637521c4e8c11697f5a9acb5188770dc89334b1ea72e2ce5058f605ab\",\"dweb:/ipfs/QmSakyzDfsYCX6VHsVfGrzuwXHWhq8PNxuMkafS1yjREhq\"]},\"project:/contracts/utils/UInt.sol\":{\"keccak256\":\"0xabf10d6f1fd47ffe04ab44b8b2f6638eece2276c3a8ba170d0c660e8212a7a8c\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://b2b1d61926fb315a771d8fd0d5d9a85ea58a154cd976a7500e12a1e2b3e14083\",\"dweb:/ipfs/QmbJkytTjjABgWbYLJBHv3uoLEAcbF7pWig71sd2rjGG2M\"]}},\"version\":1}",
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@@ -1076,7 +1082,7 @@
     {
       "ast": {
         "nodeType": "YulBlock",
-        "src": "0:27501:10",
+        "src": "0:28060:10",
         "statements": [
           {
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@@ -8089,39 +8095,39 @@
           {
             "body": {
               "nodeType": "YulBlock",
-              "src": "16029:288:10",
+              "src": "16057:371:10",
               "statements": [
                 {
                   "nodeType": "YulAssignment",
-                  "src": "16039:26:10",
+                  "src": "16067:27:10",
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                       {
                         "name": "headStart",
                         "nodeType": "YulIdentifier",
-                        "src": "16051:9:10"
+                        "src": "16079:9:10"
                       },
                       {
                         "kind": "number",
                         "nodeType": "YulLiteral",
-                        "src": "16062:2:10",
+                        "src": "16090:3:10",
                         "type": "",
-                        "value": "96"
+                        "value": "128"
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                     "functionName": {
                       "name": "add",
                       "nodeType": "YulIdentifier",
-                      "src": "16047:3:10"
+                      "src": "16075:3:10"
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+                    "src": "16075:19:10"
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                       "name": "tail",
                       "nodeType": "YulIdentifier",
-                      "src": "16039:4:10"
+                      "src": "16067:4:10"
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@@ -8131,19 +8137,19 @@
                       {
                         "name": "value0",
                         "nodeType": "YulIdentifier",
-                        "src": "16119:6:10"
+                        "src": "16148:6:10"
                       },
                       {
                         "arguments": [
                           {
                             "name": "headStart",
                             "nodeType": "YulIdentifier",
-                            "src": "16132:9:10"
+                            "src": "16161:9:10"
                           },
                           {
                             "kind": "number",
                             "nodeType": "YulLiteral",
-                            "src": "16143:1:10",
+                            "src": "16172:1:10",
                             "type": "",
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                           "nodeType": "YulIdentifier",
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@@ -8174,19 +8180,19 @@
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                         "nodeType": "YulIdentifier",
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                             "nodeType": "YulIdentifier",
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                             "nodeType": "YulLiteral",
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@@ -8194,22 +8200,22 @@
                         "functionName": {
                           "name": "add",
                           "nodeType": "YulIdentifier",
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@@ -8217,19 +8223,19 @@
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                         "name": "value2",
                         "nodeType": "YulIdentifier",
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                             "nodeType": "YulIdentifier",
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                             "nodeType": "YulLiteral",
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@@ -8237,50 +8243,99 @@
                         "functionName": {
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                           "nodeType": "YulIdentifier",
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+                            "type": "",
+                            "value": "96"
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+                          "nodeType": "YulIdentifier",
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@@ -8307,12 +8362,12 @@
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@@ -8320,16 +8375,16 @@
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@@ -8534,68 +8589,68 @@
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@@ -8634,12 +8689,12 @@
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@@ -8647,16 +8702,16 @@
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                       "nodeType": "YulIdentifier",
-                      "src": "24621:11:10"
+                      "src": "25180:11:10"
                     }
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@@ -11362,13 +11625,13 @@
               {
                 "name": "pos",
                 "nodeType": "YulTypedName",
-                "src": "24583:3:10",
+                "src": "25142:3:10",
                 "type": ""
               },
               {
                 "name": "length",
                 "nodeType": "YulTypedName",
-                "src": "24588:6:10",
+                "src": "25147:6:10",
                 "type": ""
               }
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@@ -11376,24 +11639,24 @@
               {
                 "name": "updated_pos",
                 "nodeType": "YulTypedName",
-                "src": "24599:11:10",
+                "src": "25158:11:10",
                 "type": ""
               }
             ],
-            "src": "24498:147:10"
+            "src": "25057:147:10"
           },
           {
             "body": {
               "nodeType": "YulBlock",
-              "src": "24700:258:10",
+              "src": "25259:258:10",
               "statements": [
                 {
                   "nodeType": "YulVariableDeclaration",
-                  "src": "24710:10:10",
+                  "src": "25269:10:10",
                   "value": {
                     "kind": "number",
                     "nodeType": "YulLiteral",
-                    "src": "24719:1:10",
+                    "src": "25278:1:10",
                     "type": "",
                     "value": "0"
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@@ -11401,7 +11664,7 @@
                     {
                       "name": "i",
                       "nodeType": "YulTypedName",
-                      "src": "24714:1:10",
+                      "src": "25273:1:10",
                       "type": ""
                     }
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@@ -11409,7 +11672,7 @@
                 {
                   "body": {
                     "nodeType": "YulBlock",
-                    "src": "24779:63:10",
+                    "src": "25338:63:10",
                     "statements": [
                       {
                         "expression": {
@@ -11419,21 +11682,21 @@
                                 {
                                   "name": "dst",
                                   "nodeType": "YulIdentifier",
-                                  "src": "24804:3:10"
+                                  "src": "25363:3:10"
                                 },
                                 {
                                   "name": "i",
                                   "nodeType": "YulIdentifier",
-                                  "src": "24809:1:10"
+                                  "src": "25368:1:10"
                                 }
                               ],
                               "functionName": {
                                 "name": "add",
                                 "nodeType": "YulIdentifier",
-                                "src": "24800:3:10"
+                                "src": "25359:3:10"
                               },
                               "nodeType": "YulFunctionCall",
-                              "src": "24800:11:10"
+                              "src": "25359:11:10"
                             },
                             {
                               "arguments": [
@@ -11442,42 +11705,42 @@
                                     {
                                       "name": "src",
                                       "nodeType": "YulIdentifier",
-                                      "src": "24823:3:10"
+                                      "src": "25382:3:10"
                                     },
                                     {
                                       "name": "i",
                                       "nodeType": "YulIdentifier",
-                                      "src": "24828:1:10"
+                                      "src": "25387:1:10"
                                     }
                                   ],
                                   "functionName": {
                                     "name": "add",
                                     "nodeType": "YulIdentifier",
-                                    "src": "24819:3:10"
+                                    "src": "25378:3:10"
                                   },
                                   "nodeType": "YulFunctionCall",
-                                  "src": "24819:11:10"
+                                  "src": "25378:11:10"
                                 }
                               ],
                               "functionName": {
                                 "name": "mload",
                                 "nodeType": "YulIdentifier",
-                                "src": "24813:5:10"
+                                "src": "25372:5:10"
                               },
                               "nodeType": "YulFunctionCall",
-                              "src": "24813:18:10"
+                              "src": "25372:18:10"
                             }
                           ],
                           "functionName": {
                             "name": "mstore",
                             "nodeType": "YulIdentifier",
-                            "src": "24793:6:10"
+                            "src": "25352:6:10"
                           },
                           "nodeType": "YulFunctionCall",
-                          "src": "24793:39:10"
+                          "src": "25352:39:10"
                         },
                         "nodeType": "YulExpressionStatement",
-                        "src": "24793:39:10"
+                        "src": "25352:39:10"
                       }
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@@ -11486,41 +11749,41 @@
                       {
                         "name": "i",
                         "nodeType": "YulIdentifier",
-                        "src": "24740:1:10"
+                        "src": "25299:1:10"
                       },
                       {
                         "name": "length",
                         "nodeType": "YulIdentifier",
-                        "src": "24743:6:10"
+                        "src": "25302:6:10"
                       }
                     ],
                     "functionName": {
                       "name": "lt",
                       "nodeType": "YulIdentifier",
-                      "src": "24737:2:10"
+                      "src": "25296:2:10"
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-                    "src": "24737:13:10"
+                    "src": "25296:13:10"
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                   "post": {
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-                    "src": "24751:19:10",
+                    "src": "25310:19:10",
                     "statements": [
                       {
                         "nodeType": "YulAssignment",
-                        "src": "24753:15:10",
+                        "src": "25312:15:10",
                         "value": {
                           "arguments": [
                             {
                               "name": "i",
                               "nodeType": "YulIdentifier",
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+                              "src": "25321:1:10"
                             },
                             {
                               "kind": "number",
                               "nodeType": "YulLiteral",
-                              "src": "24765:2:10",
+                              "src": "25324:2:10",
                               "type": "",
                               "value": "32"
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@@ -11528,16 +11791,16 @@
                           "functionName": {
                             "name": "add",
                             "nodeType": "YulIdentifier",
-                            "src": "24758:3:10"
+                            "src": "25317:3:10"
                           },
                           "nodeType": "YulFunctionCall",
-                          "src": "24758:10:10"
+                          "src": "25317:10:10"
                         },
                         "variableNames": [
                           {
                             "name": "i",
                             "nodeType": "YulIdentifier",
-                            "src": "24753:1:10"
+                            "src": "25312:1:10"
                           }
                         ]
                       }
@@ -11545,15 +11808,15 @@
                   },
                   "pre": {
                     "nodeType": "YulBlock",
-                    "src": "24733:3:10",
+                    "src": "25292:3:10",
                     "statements": []
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+                  "src": "25288:113:10"
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                   "body": {
                     "nodeType": "YulBlock",
-                    "src": "24876:76:10",
+                    "src": "25435:76:10",
                     "statements": [
                       {
                         "expression": {
@@ -11563,26 +11826,26 @@
                                 {
                                   "name": "dst",
                                   "nodeType": "YulIdentifier",
-                                  "src": "24926:3:10"
+                                  "src": "25485:3:10"
                                 },
                                 {
                                   "name": "length",
                                   "nodeType": "YulIdentifier",
-                                  "src": "24931:6:10"
+                                  "src": "25490:6:10"
                                 }
                               ],
                               "functionName": {
                                 "name": "add",
                                 "nodeType": "YulIdentifier",
-                                "src": "24922:3:10"
+                                "src": "25481:3:10"
                               },
                               "nodeType": "YulFunctionCall",
-                              "src": "24922:16:10"
+                              "src": "25481:16:10"
                             },
                             {
                               "kind": "number",
                               "nodeType": "YulLiteral",
-                              "src": "24940:1:10",
+                              "src": "25499:1:10",
                               "type": "",
                               "value": "0"
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@@ -11590,13 +11853,13 @@
                           "functionName": {
                             "name": "mstore",
                             "nodeType": "YulIdentifier",
-                            "src": "24915:6:10"
+                            "src": "25474:6:10"
                           },
                           "nodeType": "YulFunctionCall",
-                          "src": "24915:27:10"
+                          "src": "25474:27:10"
                         },
                         "nodeType": "YulExpressionStatement",
-                        "src": "24915:27:10"
+                        "src": "25474:27:10"
                       }
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@@ -11605,24 +11868,24 @@
                       {
                         "name": "i",
                         "nodeType": "YulIdentifier",
-                        "src": "24857:1:10"
+                        "src": "25416:1:10"
                       },
                       {
                         "name": "length",
                         "nodeType": "YulIdentifier",
-                        "src": "24860:6:10"
+                        "src": "25419:6:10"
                       }
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                     "functionName": {
                       "name": "gt",
                       "nodeType": "YulIdentifier",
-                      "src": "24854:2:10"
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                   },
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@@ -11632,86 +11895,86 @@
               {
                 "name": "src",
                 "nodeType": "YulTypedName",
-                "src": "24682:3:10",
+                "src": "25241:3:10",
                 "type": ""
               },
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                 "name": "dst",
                 "nodeType": "YulTypedName",
-                "src": "24687:3:10",
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                 "type": ""
               },
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                 "name": "length",
                 "nodeType": "YulTypedName",
-                "src": "24692:6:10",
+                "src": "25251:6:10",
                 "type": ""
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-            "src": "24651:307:10"
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               "statements": [
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                   "value": {
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                       {
                         "name": "value",
                         "nodeType": "YulIdentifier",
-                        "src": "25128:5:10"
+                        "src": "25687:5:10"
                       }
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                       "name": "array_length_t_bytes_memory_ptr",
                       "nodeType": "YulIdentifier",
-                      "src": "25096:31:10"
+                      "src": "25655:31:10"
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                     {
                       "name": "length",
                       "nodeType": "YulTypedName",
-                      "src": "25086:6:10",
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                       "type": ""
                     }
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                   "nodeType": "YulAssignment",
-                  "src": "25143:95:10",
+                  "src": "25702:95:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "25226:3:10"
+                        "src": "25785:3:10"
                       },
                       {
                         "name": "length",
                         "nodeType": "YulIdentifier",
-                        "src": "25231:6:10"
+                        "src": "25790:6:10"
                       }
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                     "functionName": {
                       "name": "array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack",
                       "nodeType": "YulIdentifier",
-                      "src": "25150:75:10"
+                      "src": "25709:75:10"
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                       "name": "pos",
                       "nodeType": "YulIdentifier",
-                      "src": "25143:3:10"
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@@ -11723,12 +11986,12 @@
                           {
                             "name": "value",
                             "nodeType": "YulIdentifier",
-                            "src": "25273:5:10"
+                            "src": "25832:5:10"
                           },
                           {
                             "kind": "number",
                             "nodeType": "YulLiteral",
-                            "src": "25280:4:10",
+                            "src": "25839:4:10",
                             "type": "",
                             "value": "0x20"
                           }
@@ -11736,62 +11999,62 @@
                         "functionName": {
                           "name": "add",
                           "nodeType": "YulIdentifier",
-                          "src": "25269:3:10"
+                          "src": "25828:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "25269:16:10"
+                        "src": "25828:16:10"
                       },
                       {
                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "25287:3:10"
+                        "src": "25846:3:10"
                       },
                       {
                         "name": "length",
                         "nodeType": "YulIdentifier",
-                        "src": "25292:6:10"
+                        "src": "25851:6:10"
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                     "functionName": {
                       "name": "copy_memory_to_memory",
                       "nodeType": "YulIdentifier",
-                      "src": "25247:21:10"
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                   "value": {
                     "arguments": [
                       {
                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "25319:3:10"
+                        "src": "25878:3:10"
                       },
                       {
                         "name": "length",
                         "nodeType": "YulIdentifier",
-                        "src": "25324:6:10"
+                        "src": "25883:6:10"
                       }
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                     "functionName": {
                       "name": "add",
                       "nodeType": "YulIdentifier",
-                      "src": "25315:3:10"
+                      "src": "25874:3:10"
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                   "variableNames": [
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                       "name": "end",
                       "nodeType": "YulIdentifier",
-                      "src": "25308:3:10"
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@@ -11803,13 +12066,13 @@
               {
                 "name": "value",
                 "nodeType": "YulTypedName",
-                "src": "25053:5:10",
+                "src": "25612:5:10",
                 "type": ""
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               {
                 "name": "pos",
                 "nodeType": "YulTypedName",
-                "src": "25060:3:10",
+                "src": "25619:3:10",
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@@ -11817,62 +12080,62 @@
               {
                 "name": "end",
                 "nodeType": "YulTypedName",
-                "src": "25068:3:10",
+                "src": "25627:3:10",
                 "type": ""
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-            "src": "24964:373:10"
+            "src": "25523:373:10"
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           {
             "body": {
               "nodeType": "YulBlock",
-              "src": "25477:137:10",
+              "src": "26036:137:10",
               "statements": [
                 {
                   "nodeType": "YulAssignment",
-                  "src": "25488:100:10",
+                  "src": "26047:100:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "value0",
                         "nodeType": "YulIdentifier",
-                        "src": "25575:6:10"
+                        "src": "26134:6:10"
                       },
                       {
                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "25584:3:10"
+                        "src": "26143:3:10"
                       }
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                     "functionName": {
                       "name": "abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack",
                       "nodeType": "YulIdentifier",
-                      "src": "25495:79:10"
+                      "src": "26054:79:10"
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                       "nodeType": "YulIdentifier",
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                     "nodeType": "YulIdentifier",
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                       "name": "end",
                       "nodeType": "YulIdentifier",
-                      "src": "25598:3:10"
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@@ -11884,13 +12147,13 @@
               {
                 "name": "pos",
                 "nodeType": "YulTypedName",
-                "src": "25456:3:10",
+                "src": "26015:3:10",
                 "type": ""
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                 "name": "value0",
                 "nodeType": "YulTypedName",
-                "src": "25462:6:10",
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@@ -11898,16 +12161,16 @@
               {
                 "name": "end",
                 "nodeType": "YulTypedName",
-                "src": "25473:3:10",
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-              "src": "25726:73:10",
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@@ -11917,12 +12180,12 @@
                           {
                             "name": "memPtr",
                             "nodeType": "YulIdentifier",
-                            "src": "25748:6:10"
+                            "src": "26307:6:10"
                           },
                           {
                             "kind": "number",
                             "nodeType": "YulLiteral",
-                            "src": "25756:1:10",
+                            "src": "26315:1:10",
                             "type": "",
                             "value": "0"
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@@ -11930,16 +12193,16 @@
                         "functionName": {
                           "name": "add",
                           "nodeType": "YulIdentifier",
-                          "src": "25744:3:10"
+                          "src": "26303:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "25744:14:10"
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                         "kind": "string",
                         "nodeType": "YulLiteral",
-                        "src": "25760:31:10",
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                         "type": "",
                         "value": "Address: call to non-contract"
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@@ -11947,13 +12210,13 @@
                     "functionName": {
                       "name": "mstore",
                       "nodeType": "YulIdentifier",
-                      "src": "25737:6:10"
+                      "src": "26296:6:10"
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@@ -11963,31 +12226,31 @@
               {
                 "name": "memPtr",
                 "nodeType": "YulTypedName",
-                "src": "25718:6:10",
+                "src": "26277:6:10",
                 "type": ""
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                   "value": {
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                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "26027:3:10"
+                        "src": "26586:3:10"
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                         "kind": "number",
                         "nodeType": "YulLiteral",
-                        "src": "26032:2:10",
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@@ -11995,16 +12258,16 @@
                     "functionName": {
                       "name": "array_storeLengthForEncoding_t_string_memory_ptr_fromStack",
                       "nodeType": "YulIdentifier",
-                      "src": "25968:58:10"
+                      "src": "26527:58:10"
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@@ -12014,34 +12277,34 @@
                       {
                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "26133:3:10"
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                         "nodeType": "YulIdentifier",
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                         "kind": "number",
                         "nodeType": "YulLiteral",
-                        "src": "26162:2:10",
+                        "src": "26721:2:10",
                         "type": "",
                         "value": "32"
                       }
@@ -12049,16 +12312,16 @@
                     "functionName": {
                       "name": "add",
                       "nodeType": "YulIdentifier",
-                      "src": "26153:3:10"
+                      "src": "26712:3:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "26153:12:10"
+                    "src": "26712:12:10"
                   },
                   "variableNames": [
                     {
                       "name": "end",
                       "nodeType": "YulIdentifier",
-                      "src": "26146:3:10"
+                      "src": "26705:3:10"
                     }
                   ]
                 }
@@ -12070,7 +12333,7 @@
               {
                 "name": "pos",
                 "nodeType": "YulTypedName",
-                "src": "25939:3:10",
+                "src": "26498:3:10",
                 "type": ""
               }
             ],
@@ -12078,31 +12341,31 @@
               {
                 "name": "end",
                 "nodeType": "YulTypedName",
-                "src": "25947:3:10",
+                "src": "26506:3:10",
                 "type": ""
               }
             ],
-            "src": "25805:366:10"
+            "src": "26364:366:10"
           },
           {
             "body": {
               "nodeType": "YulBlock",
-              "src": "26348:248:10",
+              "src": "26907:248:10",
               "statements": [
                 {
                   "nodeType": "YulAssignment",
-                  "src": "26358:26:10",
+                  "src": "26917:26:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "headStart",
                         "nodeType": "YulIdentifier",
-                        "src": "26370:9:10"
+                        "src": "26929:9:10"
                       },
                       {
                         "kind": "number",
                         "nodeType": "YulLiteral",
-                        "src": "26381:2:10",
+                        "src": "26940:2:10",
                         "type": "",
                         "value": "32"
                       }
@@ -12110,16 +12373,16 @@
                     "functionName": {
                       "name": "add",
                       "nodeType": "YulIdentifier",
-                      "src": "26366:3:10"
+                      "src": "26925:3:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "26366:18:10"
+                    "src": "26925:18:10"
                   },
                   "variableNames": [
                     {
                       "name": "tail",
                       "nodeType": "YulIdentifier",
-                      "src": "26358:4:10"
+                      "src": "26917:4:10"
                     }
                   ]
                 },
@@ -12131,12 +12394,12 @@
                           {
                             "name": "headStart",
                             "nodeType": "YulIdentifier",
-                            "src": "26405:9:10"
+                            "src": "26964:9:10"
                           },
                           {
                             "kind": "number",
                             "nodeType": "YulLiteral",
-                            "src": "26416:1:10",
+                            "src": "26975:1:10",
                             "type": "",
                             "value": "0"
                           }
@@ -12144,68 +12407,68 @@
                         "functionName": {
                           "name": "add",
                           "nodeType": "YulIdentifier",
-                          "src": "26401:3:10"
+                          "src": "26960:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "26401:17:10"
+                        "src": "26960:17:10"
                       },
                       {
                         "arguments": [
                           {
                             "name": "tail",
                             "nodeType": "YulIdentifier",
-                            "src": "26424:4:10"
+                            "src": "26983:4:10"
                           },
                           {
                             "name": "headStart",
                             "nodeType": "YulIdentifier",
-                            "src": "26430:9:10"
+                            "src": "26989:9:10"
                           }
                         ],
                         "functionName": {
                           "name": "sub",
                           "nodeType": "YulIdentifier",
-                          "src": "26420:3:10"
+                          "src": "26979:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "26420:20:10"
+                        "src": "26979:20:10"
                       }
                     ],
                     "functionName": {
                       "name": "mstore",
                       "nodeType": "YulIdentifier",
-                      "src": "26394:6:10"
+                      "src": "26953:6:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "26394:47:10"
+                    "src": "26953:47:10"
                   },
                   "nodeType": "YulExpressionStatement",
-                  "src": "26394:47:10"
+                  "src": "26953:47:10"
                 },
                 {
                   "nodeType": "YulAssignment",
-                  "src": "26450:139:10",
+                  "src": "27009:139:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "tail",
                         "nodeType": "YulIdentifier",
-                        "src": "26584:4:10"
+                        "src": "27143:4:10"
                       }
                     ],
                     "functionName": {
                       "name": "abi_encode_t_stringliteral_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad_to_t_string_memory_ptr_fromStack",
                       "nodeType": "YulIdentifier",
-                      "src": "26458:124:10"
+                      "src": "27017:124:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "26458:131:10"
+                    "src": "27017:131:10"
                   },
                   "variableNames": [
                     {
                       "name": "tail",
                       "nodeType": "YulIdentifier",
-                      "src": "26450:4:10"
+                      "src": "27009:4:10"
                     }
                   ]
                 }
@@ -12217,7 +12480,7 @@
               {
                 "name": "headStart",
                 "nodeType": "YulTypedName",
-                "src": "26328:9:10",
+                "src": "26887:9:10",
                 "type": ""
               }
             ],
@@ -12225,41 +12488,41 @@
               {
                 "name": "tail",
                 "nodeType": "YulTypedName",
-                "src": "26343:4:10",
+                "src": "26902:4:10",
                 "type": ""
               }
             ],
-            "src": "26177:419:10"
+            "src": "26736:419:10"
           },
           {
             "body": {
               "nodeType": "YulBlock",
-              "src": "26661:40:10",
+              "src": "27220:40:10",
               "statements": [
                 {
                   "nodeType": "YulAssignment",
-                  "src": "26672:22:10",
+                  "src": "27231:22:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "value",
                         "nodeType": "YulIdentifier",
-                        "src": "26688:5:10"
+                        "src": "27247:5:10"
                       }
                     ],
                     "functionName": {
                       "name": "mload",
                       "nodeType": "YulIdentifier",
-                      "src": "26682:5:10"
+                      "src": "27241:5:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "26682:12:10"
+                    "src": "27241:12:10"
                   },
                   "variableNames": [
                     {
                       "name": "length",
                       "nodeType": "YulIdentifier",
-                      "src": "26672:6:10"
+                      "src": "27231:6:10"
                     }
                   ]
                 }
@@ -12271,7 +12534,7 @@
               {
                 "name": "value",
                 "nodeType": "YulTypedName",
-                "src": "26644:5:10",
+                "src": "27203:5:10",
                 "type": ""
               }
             ],
@@ -12279,20 +12542,20 @@
               {
                 "name": "length",
                 "nodeType": "YulTypedName",
-                "src": "26654:6:10",
+                "src": "27213:6:10",
                 "type": ""
               }
             ],
-            "src": "26602:99:10"
+            "src": "27161:99:10"
           },
           {
             "body": {
               "nodeType": "YulBlock",
-              "src": "26755:54:10",
+              "src": "27314:54:10",
               "statements": [
                 {
                   "nodeType": "YulAssignment",
-                  "src": "26765:38:10",
+                  "src": "27324:38:10",
                   "value": {
                     "arguments": [
                       {
@@ -12300,12 +12563,12 @@
                           {
                             "name": "value",
                             "nodeType": "YulIdentifier",
-                            "src": "26783:5:10"
+                            "src": "27342:5:10"
                           },
                           {
                             "kind": "number",
                             "nodeType": "YulLiteral",
-                            "src": "26790:2:10",
+                            "src": "27349:2:10",
                             "type": "",
                             "value": "31"
                           }
@@ -12313,17 +12576,17 @@
                         "functionName": {
                           "name": "add",
                           "nodeType": "YulIdentifier",
-                          "src": "26779:3:10"
+                          "src": "27338:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "26779:14:10"
+                        "src": "27338:14:10"
                       },
                       {
                         "arguments": [
                           {
                             "kind": "number",
                             "nodeType": "YulLiteral",
-                            "src": "26799:2:10",
+                            "src": "27358:2:10",
                             "type": "",
                             "value": "31"
                           }
@@ -12331,25 +12594,25 @@
                         "functionName": {
                           "name": "not",
                           "nodeType": "YulIdentifier",
-                          "src": "26795:3:10"
+                          "src": "27354:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "26795:7:10"
+                        "src": "27354:7:10"
                       }
                     ],
                     "functionName": {
                       "name": "and",
                       "nodeType": "YulIdentifier",
-                      "src": "26775:3:10"
+                      "src": "27334:3:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "26775:28:10"
+                    "src": "27334:28:10"
                   },
                   "variableNames": [
                     {
                       "name": "result",
                       "nodeType": "YulIdentifier",
-                      "src": "26765:6:10"
+                      "src": "27324:6:10"
                     }
                   ]
                 }
@@ -12361,7 +12624,7 @@
               {
                 "name": "value",
                 "nodeType": "YulTypedName",
-                "src": "26738:5:10",
+                "src": "27297:5:10",
                 "type": ""
               }
             ],
@@ -12369,74 +12632,74 @@
               {
                 "name": "result",
                 "nodeType": "YulTypedName",
-                "src": "26748:6:10",
+                "src": "27307:6:10",
                 "type": ""
               }
             ],
-            "src": "26707:102:10"
+            "src": "27266:102:10"
           },
           {
             "body": {
               "nodeType": "YulBlock",
-              "src": "26907:272:10",
+              "src": "27466:272:10",
               "statements": [
                 {
                   "nodeType": "YulVariableDeclaration",
-                  "src": "26917:53:10",
+                  "src": "27476:53:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "value",
                         "nodeType": "YulIdentifier",
-                        "src": "26964:5:10"
+                        "src": "27523:5:10"
                       }
                     ],
                     "functionName": {
                       "name": "array_length_t_string_memory_ptr",
                       "nodeType": "YulIdentifier",
-                      "src": "26931:32:10"
+                      "src": "27490:32:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "26931:39:10"
+                    "src": "27490:39:10"
                   },
                   "variables": [
                     {
                       "name": "length",
                       "nodeType": "YulTypedName",
-                      "src": "26921:6:10",
+                      "src": "27480:6:10",
                       "type": ""
                     }
                   ]
                 },
                 {
                   "nodeType": "YulAssignment",
-                  "src": "26979:78:10",
+                  "src": "27538:78:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "27045:3:10"
+                        "src": "27604:3:10"
                       },
                       {
                         "name": "length",
                         "nodeType": "YulIdentifier",
-                        "src": "27050:6:10"
+                        "src": "27609:6:10"
                       }
                     ],
                     "functionName": {
                       "name": "array_storeLengthForEncoding_t_string_memory_ptr_fromStack",
                       "nodeType": "YulIdentifier",
-                      "src": "26986:58:10"
+                      "src": "27545:58:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "26986:71:10"
+                    "src": "27545:71:10"
                   },
                   "variableNames": [
                     {
                       "name": "pos",
                       "nodeType": "YulIdentifier",
-                      "src": "26979:3:10"
+                      "src": "27538:3:10"
                     }
                   ]
                 },
@@ -12448,12 +12711,12 @@
                           {
                             "name": "value",
                             "nodeType": "YulIdentifier",
-                            "src": "27092:5:10"
+                            "src": "27651:5:10"
                           },
                           {
                             "kind": "number",
                             "nodeType": "YulLiteral",
-                            "src": "27099:4:10",
+                            "src": "27658:4:10",
                             "type": "",
                             "value": "0x20"
                           }
@@ -12461,73 +12724,73 @@
                         "functionName": {
                           "name": "add",
                           "nodeType": "YulIdentifier",
-                          "src": "27088:3:10"
+                          "src": "27647:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "27088:16:10"
+                        "src": "27647:16:10"
                       },
                       {
                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "27106:3:10"
+                        "src": "27665:3:10"
                       },
                       {
                         "name": "length",
                         "nodeType": "YulIdentifier",
-                        "src": "27111:6:10"
+                        "src": "27670:6:10"
                       }
                     ],
                     "functionName": {
                       "name": "copy_memory_to_memory",
                       "nodeType": "YulIdentifier",
-                      "src": "27066:21:10"
+                      "src": "27625:21:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "27066:52:10"
+                    "src": "27625:52:10"
                   },
                   "nodeType": "YulExpressionStatement",
-                  "src": "27066:52:10"
+                  "src": "27625:52:10"
                 },
                 {
                   "nodeType": "YulAssignment",
-                  "src": "27127:46:10",
+                  "src": "27686:46:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "pos",
                         "nodeType": "YulIdentifier",
-                        "src": "27138:3:10"
+                        "src": "27697:3:10"
                       },
                       {
                         "arguments": [
                           {
                             "name": "length",
                             "nodeType": "YulIdentifier",
-                            "src": "27165:6:10"
+                            "src": "27724:6:10"
                           }
                         ],
                         "functionName": {
                           "name": "round_up_to_mul_of_32",
                           "nodeType": "YulIdentifier",
-                          "src": "27143:21:10"
+                          "src": "27702:21:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "27143:29:10"
+                        "src": "27702:29:10"
                       }
                     ],
                     "functionName": {
                       "name": "add",
                       "nodeType": "YulIdentifier",
-                      "src": "27134:3:10"
+                      "src": "27693:3:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "27134:39:10"
+                    "src": "27693:39:10"
                   },
                   "variableNames": [
                     {
                       "name": "end",
                       "nodeType": "YulIdentifier",
-                      "src": "27127:3:10"
+                      "src": "27686:3:10"
                     }
                   ]
                 }
@@ -12539,13 +12802,13 @@
               {
                 "name": "value",
                 "nodeType": "YulTypedName",
-                "src": "26888:5:10",
+                "src": "27447:5:10",
                 "type": ""
               },
               {
                 "name": "pos",
                 "nodeType": "YulTypedName",
-                "src": "26895:3:10",
+                "src": "27454:3:10",
                 "type": ""
               }
             ],
@@ -12553,31 +12816,31 @@
               {
                 "name": "end",
                 "nodeType": "YulTypedName",
-                "src": "26903:3:10",
+                "src": "27462:3:10",
                 "type": ""
               }
             ],
-            "src": "26815:364:10"
+            "src": "27374:364:10"
           },
           {
             "body": {
               "nodeType": "YulBlock",
-              "src": "27303:195:10",
+              "src": "27862:195:10",
               "statements": [
                 {
                   "nodeType": "YulAssignment",
-                  "src": "27313:26:10",
+                  "src": "27872:26:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "headStart",
                         "nodeType": "YulIdentifier",
-                        "src": "27325:9:10"
+                        "src": "27884:9:10"
                       },
                       {
                         "kind": "number",
                         "nodeType": "YulLiteral",
-                        "src": "27336:2:10",
+                        "src": "27895:2:10",
                         "type": "",
                         "value": "32"
                       }
@@ -12585,16 +12848,16 @@
                     "functionName": {
                       "name": "add",
                       "nodeType": "YulIdentifier",
-                      "src": "27321:3:10"
+                      "src": "27880:3:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "27321:18:10"
+                    "src": "27880:18:10"
                   },
                   "variableNames": [
                     {
                       "name": "tail",
                       "nodeType": "YulIdentifier",
-                      "src": "27313:4:10"
+                      "src": "27872:4:10"
                     }
                   ]
                 },
@@ -12606,12 +12869,12 @@
                           {
                             "name": "headStart",
                             "nodeType": "YulIdentifier",
-                            "src": "27360:9:10"
+                            "src": "27919:9:10"
                           },
                           {
                             "kind": "number",
                             "nodeType": "YulLiteral",
-                            "src": "27371:1:10",
+                            "src": "27930:1:10",
                             "type": "",
                             "value": "0"
                           }
@@ -12619,73 +12882,73 @@
                         "functionName": {
                           "name": "add",
                           "nodeType": "YulIdentifier",
-                          "src": "27356:3:10"
+                          "src": "27915:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "27356:17:10"
+                        "src": "27915:17:10"
                       },
                       {
                         "arguments": [
                           {
                             "name": "tail",
                             "nodeType": "YulIdentifier",
-                            "src": "27379:4:10"
+                            "src": "27938:4:10"
                           },
                           {
                             "name": "headStart",
                             "nodeType": "YulIdentifier",
-                            "src": "27385:9:10"
+                            "src": "27944:9:10"
                           }
                         ],
                         "functionName": {
                           "name": "sub",
                           "nodeType": "YulIdentifier",
-                          "src": "27375:3:10"
+                          "src": "27934:3:10"
                         },
                         "nodeType": "YulFunctionCall",
-                        "src": "27375:20:10"
+                        "src": "27934:20:10"
                       }
                     ],
                     "functionName": {
                       "name": "mstore",
                       "nodeType": "YulIdentifier",
-                      "src": "27349:6:10"
+                      "src": "27908:6:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "27349:47:10"
+                    "src": "27908:47:10"
                   },
                   "nodeType": "YulExpressionStatement",
-                  "src": "27349:47:10"
+                  "src": "27908:47:10"
                 },
                 {
                   "nodeType": "YulAssignment",
-                  "src": "27405:86:10",
+                  "src": "27964:86:10",
                   "value": {
                     "arguments": [
                       {
                         "name": "value0",
                         "nodeType": "YulIdentifier",
-                        "src": "27477:6:10"
+                        "src": "28036:6:10"
                       },
                       {
                         "name": "tail",
                         "nodeType": "YulIdentifier",
-                        "src": "27486:4:10"
+                        "src": "28045:4:10"
                       }
                     ],
                     "functionName": {
                       "name": "abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack",
                       "nodeType": "YulIdentifier",
-                      "src": "27413:63:10"
+                      "src": "27972:63:10"
                     },
                     "nodeType": "YulFunctionCall",
-                    "src": "27413:78:10"
+                    "src": "27972:78:10"
                   },
                   "variableNames": [
                     {
                       "name": "tail",
                       "nodeType": "YulIdentifier",
-                      "src": "27405:4:10"
+                      "src": "27964:4:10"
                     }
                   ]
                 }
@@ -12697,13 +12960,13 @@
               {
                 "name": "headStart",
                 "nodeType": "YulTypedName",
-                "src": "27275:9:10",
+                "src": "27834:9:10",
                 "type": ""
               },
               {
                 "name": "value0",
                 "nodeType": "YulTypedName",
-                "src": "27287:6:10",
+                "src": "27846:6:10",
                 "type": ""
               }
             ],
@@ -12711,23 +12974,23 @@
               {
                 "name": "tail",
                 "nodeType": "YulTypedName",
-                "src": "27298:4:10",
+                "src": "27857:4:10",
                 "type": ""
               }
             ],
-            "src": "27185:313:10"
+            "src": "27744:313:10"
           }
         ]
       },
-      "contents": "{\n\n    function cleanup_t_uint160(value) -> cleaned {\n        cleaned := and(value, 0xffffffffffffffffffffffffffffffffffffffff)\n    }\n\n    function cleanup_t_address(value) -> cleaned {\n        cleaned := cleanup_t_uint160(value)\n    }\n\n    function abi_encode_t_address_to_t_address_fromStack(value, pos) {\n        mstore(pos, cleanup_t_address(value))\n    }\n\n    function abi_encode_tuple_t_address__to_t_address__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function allocate_unbounded() -> memPtr {\n        memPtr := mload(64)\n    }\n\n    function revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() {\n        revert(0, 0)\n    }\n\n    function revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() {\n        revert(0, 0)\n    }\n\n    function validator_revert_t_address(value) {\n        if iszero(eq(value, cleanup_t_address(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_address(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_address(value)\n    }\n\n    function abi_decode_tuple_t_address(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function cleanup_t_uint256(value) -> cleaned {\n        cleaned := value\n    }\n\n    function validator_revert_t_uint256(value) {\n        if iszero(eq(value, cleanup_t_uint256(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_uint256(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function cleanup_t_bool(value) -> cleaned {\n        cleaned := iszero(iszero(value))\n    }\n\n    function abi_encode_t_bool_to_t_bool_fromStack(value, pos) {\n        mstore(pos, cleanup_t_bool(value))\n    }\n\n    function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_bool_to_t_bool_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint256(value))\n    }\n\n    function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function store_literal_in_memory_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924(memPtr) {\n\n        mstore(add(memPtr, 0), \"fee received address can not be \")\n\n        mstore(add(memPtr, 32), \"zero\")\n\n    }\n\n    function abi_encode_t_stringliteral_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 36)\n        store_literal_in_memory_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: invalid amount\")\n\n    }\n\n    function abi_encode_t_stringliteral_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 27)\n        store_literal_in_memory_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: invalid payment met\")\n\n        mstore(add(memPtr, 32), \"hod\")\n\n    }\n\n    function abi_encode_t_stringliteral_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 35)\n        store_literal_in_memory_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: invalid token price\")\n\n    }\n\n    function abi_encode_t_stringliteral_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 32)\n        store_literal_in_memory_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_decode_t_uint256_fromMemory(offset, end) -> value {\n        value := mload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_uint256_fromMemory(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_uint256_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function panic_error_0x11() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x11)\n        revert(0, 0x24)\n    }\n\n    function checked_sub_t_uint256(x, y) -> diff {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        if lt(x, y) { panic_error_0x11() }\n\n        diff := sub(x, y)\n    }\n\n    function shift_right_1_unsigned(value) -> newValue {\n        newValue :=\n\n        shr(1, value)\n\n    }\n\n    function checked_exp_helper(_power, _base, exponent, max) -> power, base {\n        power := _power\n        base  := _base\n        for { } gt(exponent, 1) {}\n        {\n            // overflow check for base * base\n            if gt(base, div(max, base)) { panic_error_0x11() }\n            if and(exponent, 1)\n            {\n                // No checks for power := mul(power, base) needed, because the check\n                // for base * base above is sufficient, since:\n                // |power| <= base (proof by induction) and thus:\n                // |power * base| <= base * base <= max <= |min| (for signed)\n                // (this is equally true for signed and unsigned exp)\n                power := mul(power, base)\n            }\n            base := mul(base, base)\n            exponent := shift_right_1_unsigned(exponent)\n        }\n    }\n\n    function checked_exp_unsigned(base, exponent, max) -> power {\n        // This function currently cannot be inlined because of the\n        // \"leave\" statements. We have to improve the optimizer.\n\n        // Note that 0**0 == 1\n        if iszero(exponent) { power := 1 leave }\n        if iszero(base) { power := 0 leave }\n\n        // Specializations for small bases\n        switch base\n        // 0 is handled above\n        case 1 { power := 1 leave }\n        case 2\n        {\n            if gt(exponent, 255) { panic_error_0x11() }\n            power := exp(2, exponent)\n            if gt(power, max) { panic_error_0x11() }\n            leave\n        }\n        if or(\n            and(lt(base, 11), lt(exponent, 78)),\n            and(lt(base, 307), lt(exponent, 32))\n        )\n        {\n            power := exp(base, exponent)\n            if gt(power, max) { panic_error_0x11() }\n            leave\n        }\n\n        power, base := checked_exp_helper(1, base, exponent, max)\n\n        if gt(power, div(max, base)) { panic_error_0x11() }\n        power := mul(power, base)\n    }\n\n    function checked_exp_t_uint256_t_uint256(base, exponent) -> power {\n        base := cleanup_t_uint256(base)\n        exponent := cleanup_t_uint256(exponent)\n\n        power := checked_exp_unsigned(base, exponent, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)\n\n    }\n\n    function checked_mul_t_uint256(x, y) -> product {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        // overflow, if x != 0 and y > (maxValue / x)\n        if and(iszero(iszero(x)), gt(y, div(0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, x))) { panic_error_0x11() }\n\n        product := mul(x, y)\n    }\n\n    function panic_error_0x12() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x12)\n        revert(0, 0x24)\n    }\n\n    function checked_div_t_uint256(x, y) -> r {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n        if iszero(y) { panic_error_0x12() }\n\n        r := div(x, y)\n    }\n\n    function store_literal_in_memory_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: seller doesn't have\")\n\n        mstore(add(memPtr, 32), \" enough token to sell this item\")\n\n    }\n\n    function abi_encode_t_stringliteral_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 63)\n        store_literal_in_memory_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_address_t_address__to_t_address_t_address__fromStack_reversed(headStart , value1, value0) -> tail {\n        tail := add(headStart, 64)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_address_to_t_address_fromStack(value1,  add(headStart, 32))\n\n    }\n\n    function store_literal_in_memory_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: seller doesn't appr\")\n\n        mstore(add(memPtr, 32), \"ove enough token to sell this it\")\n\n        mstore(add(memPtr, 64), \"em\")\n\n    }\n\n    function abi_encode_t_stringliteral_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 66)\n        store_literal_in_memory_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116(pos)\n        end := add(pos, 96)\n    }\n\n    function abi_encode_tuple_t_stringliteral_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: buyer doesn't have \")\n\n        mstore(add(memPtr, 32), \"enough token to buy this item\")\n\n    }\n\n    function abi_encode_t_stringliteral_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 61)\n        store_literal_in_memory_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: buyer doesn't appro\")\n\n        mstore(add(memPtr, 32), \"ve enough token to buy this item\")\n\n    }\n\n    function abi_encode_t_stringliteral_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 64)\n        store_literal_in_memory_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_address_t_address_t_uint256__to_t_address_t_address_t_uint256__fromStack_reversed(headStart , value2, value1, value0) -> tail {\n        tail := add(headStart, 96)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_address_to_t_address_fromStack(value1,  add(headStart, 32))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value2,  add(headStart, 64))\n\n    }\n\n    function store_literal_in_memory_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c(memPtr) {\n\n        mstore(add(memPtr, 0), \"address can not be zero\")\n\n    }\n\n    function abi_encode_t_stringliteral_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 23)\n        store_literal_in_memory_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20 address is zero\")\n\n    }\n\n    function abi_encode_t_stringliteral_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 21)\n        store_literal_in_memory_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_address_t_uint256_t_uint256__to_t_address_t_uint256_t_uint256__fromStack_reversed(headStart , value2, value1, value0) -> tail {\n        tail := add(headStart, 96)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value1,  add(headStart, 32))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value2,  add(headStart, 64))\n\n    }\n\n    function store_literal_in_memory_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe(memPtr) {\n\n        mstore(add(memPtr, 0), \"Ownable: new owner is the zero a\")\n\n        mstore(add(memPtr, 32), \"ddress\")\n\n    }\n\n    function abi_encode_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 38)\n        store_literal_in_memory_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe(memPtr) {\n\n        mstore(add(memPtr, 0), \"Ownable: caller is not the owner\")\n\n    }\n\n    function abi_encode_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 32)\n        store_literal_in_memory_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619(memPtr) {\n\n        mstore(add(memPtr, 0), \"ReentrancyGuard: reentrant call\")\n\n    }\n\n    function abi_encode_t_stringliteral_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 31)\n        store_literal_in_memory_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function validator_revert_t_bool(value) {\n        if iszero(eq(value, cleanup_t_bool(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_bool_fromMemory(offset, end) -> value {\n        value := mload(offset)\n        validator_revert_t_bool(value)\n    }\n\n    function abi_decode_tuple_t_bool_fromMemory(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_bool_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function store_literal_in_memory_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd(memPtr) {\n\n        mstore(add(memPtr, 0), \"SafeERC20: ERC20 operation did n\")\n\n        mstore(add(memPtr, 32), \"ot succeed\")\n\n    }\n\n    function abi_encode_t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 42)\n        store_literal_in_memory_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c(memPtr) {\n\n        mstore(add(memPtr, 0), \"Address: insufficient balance fo\")\n\n        mstore(add(memPtr, 32), \"r call\")\n\n    }\n\n    function abi_encode_t_stringliteral_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 38)\n        store_literal_in_memory_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function array_length_t_bytes_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack(pos, length) -> updated_pos {\n        updated_pos := pos\n    }\n\n    function copy_memory_to_memory(src, dst, length) {\n        let i := 0\n        for { } lt(i, length) { i := add(i, 32) }\n        {\n            mstore(add(dst, i), mload(add(src, i)))\n        }\n        if gt(i, length)\n        {\n            // clear end\n            mstore(add(dst, length), 0)\n        }\n    }\n\n    function abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value, pos) -> end {\n        let length := array_length_t_bytes_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, length)\n    }\n\n    function abi_encode_tuple_packed_t_bytes_memory_ptr__to_t_bytes_memory_ptr__nonPadded_inplace_fromStack_reversed(pos , value0) -> end {\n\n        pos := abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value0,  pos)\n\n        end := pos\n    }\n\n    function store_literal_in_memory_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad(memPtr) {\n\n        mstore(add(memPtr, 0), \"Address: call to non-contract\")\n\n    }\n\n    function abi_encode_t_stringliteral_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 29)\n        store_literal_in_memory_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function array_length_t_string_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function round_up_to_mul_of_32(value) -> result {\n        result := and(add(value, 31), not(31))\n    }\n\n    function abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value, pos) -> end {\n        let length := array_length_t_string_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, round_up_to_mul_of_32(length))\n    }\n\n    function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value0,  tail)\n\n    }\n\n}\n",
+      "contents": "{\n\n    function cleanup_t_uint160(value) -> cleaned {\n        cleaned := and(value, 0xffffffffffffffffffffffffffffffffffffffff)\n    }\n\n    function cleanup_t_address(value) -> cleaned {\n        cleaned := cleanup_t_uint160(value)\n    }\n\n    function abi_encode_t_address_to_t_address_fromStack(value, pos) {\n        mstore(pos, cleanup_t_address(value))\n    }\n\n    function abi_encode_tuple_t_address__to_t_address__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function allocate_unbounded() -> memPtr {\n        memPtr := mload(64)\n    }\n\n    function revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() {\n        revert(0, 0)\n    }\n\n    function revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() {\n        revert(0, 0)\n    }\n\n    function validator_revert_t_address(value) {\n        if iszero(eq(value, cleanup_t_address(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_address(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_address(value)\n    }\n\n    function abi_decode_tuple_t_address(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function cleanup_t_uint256(value) -> cleaned {\n        cleaned := value\n    }\n\n    function validator_revert_t_uint256(value) {\n        if iszero(eq(value, cleanup_t_uint256(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_uint256(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function cleanup_t_bool(value) -> cleaned {\n        cleaned := iszero(iszero(value))\n    }\n\n    function abi_encode_t_bool_to_t_bool_fromStack(value, pos) {\n        mstore(pos, cleanup_t_bool(value))\n    }\n\n    function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_bool_to_t_bool_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint256(value))\n    }\n\n    function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function store_literal_in_memory_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924(memPtr) {\n\n        mstore(add(memPtr, 0), \"fee received address can not be \")\n\n        mstore(add(memPtr, 32), \"zero\")\n\n    }\n\n    function abi_encode_t_stringliteral_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 36)\n        store_literal_in_memory_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_aaa625db430dfb3ad2fa62eaddd511a6cd8de860cee36054f7986cfa0debb924_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: invalid amount\")\n\n    }\n\n    function abi_encode_t_stringliteral_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 27)\n        store_literal_in_memory_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_a2d21523123f6a5636f1f4f57c897909bc3f74962b6955ed8c6676563580d5be_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: invalid payment met\")\n\n        mstore(add(memPtr, 32), \"hod\")\n\n    }\n\n    function abi_encode_t_stringliteral_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 35)\n        store_literal_in_memory_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_ce49507a01a15df79dff2538e31e6b4b37d348783463e336d10e68082f4288fa_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: invalid token price\")\n\n    }\n\n    function abi_encode_t_stringliteral_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 32)\n        store_literal_in_memory_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_de0baa7be4f17d52c3048a4dab4dba816280e3b0920fda3f994482639c9555cd_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_decode_t_uint256_fromMemory(offset, end) -> value {\n        value := mload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_uint256_fromMemory(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_uint256_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function panic_error_0x11() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x11)\n        revert(0, 0x24)\n    }\n\n    function checked_sub_t_uint256(x, y) -> diff {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        if lt(x, y) { panic_error_0x11() }\n\n        diff := sub(x, y)\n    }\n\n    function shift_right_1_unsigned(value) -> newValue {\n        newValue :=\n\n        shr(1, value)\n\n    }\n\n    function checked_exp_helper(_power, _base, exponent, max) -> power, base {\n        power := _power\n        base  := _base\n        for { } gt(exponent, 1) {}\n        {\n            // overflow check for base * base\n            if gt(base, div(max, base)) { panic_error_0x11() }\n            if and(exponent, 1)\n            {\n                // No checks for power := mul(power, base) needed, because the check\n                // for base * base above is sufficient, since:\n                // |power| <= base (proof by induction) and thus:\n                // |power * base| <= base * base <= max <= |min| (for signed)\n                // (this is equally true for signed and unsigned exp)\n                power := mul(power, base)\n            }\n            base := mul(base, base)\n            exponent := shift_right_1_unsigned(exponent)\n        }\n    }\n\n    function checked_exp_unsigned(base, exponent, max) -> power {\n        // This function currently cannot be inlined because of the\n        // \"leave\" statements. We have to improve the optimizer.\n\n        // Note that 0**0 == 1\n        if iszero(exponent) { power := 1 leave }\n        if iszero(base) { power := 0 leave }\n\n        // Specializations for small bases\n        switch base\n        // 0 is handled above\n        case 1 { power := 1 leave }\n        case 2\n        {\n            if gt(exponent, 255) { panic_error_0x11() }\n            power := exp(2, exponent)\n            if gt(power, max) { panic_error_0x11() }\n            leave\n        }\n        if or(\n            and(lt(base, 11), lt(exponent, 78)),\n            and(lt(base, 307), lt(exponent, 32))\n        )\n        {\n            power := exp(base, exponent)\n            if gt(power, max) { panic_error_0x11() }\n            leave\n        }\n\n        power, base := checked_exp_helper(1, base, exponent, max)\n\n        if gt(power, div(max, base)) { panic_error_0x11() }\n        power := mul(power, base)\n    }\n\n    function checked_exp_t_uint256_t_uint256(base, exponent) -> power {\n        base := cleanup_t_uint256(base)\n        exponent := cleanup_t_uint256(exponent)\n\n        power := checked_exp_unsigned(base, exponent, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)\n\n    }\n\n    function checked_mul_t_uint256(x, y) -> product {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        // overflow, if x != 0 and y > (maxValue / x)\n        if and(iszero(iszero(x)), gt(y, div(0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, x))) { panic_error_0x11() }\n\n        product := mul(x, y)\n    }\n\n    function panic_error_0x12() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x12)\n        revert(0, 0x24)\n    }\n\n    function checked_div_t_uint256(x, y) -> r {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n        if iszero(y) { panic_error_0x12() }\n\n        r := div(x, y)\n    }\n\n    function store_literal_in_memory_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: seller doesn't have\")\n\n        mstore(add(memPtr, 32), \" enough token to sell this item\")\n\n    }\n\n    function abi_encode_t_stringliteral_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 63)\n        store_literal_in_memory_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_address_t_address__to_t_address_t_address__fromStack_reversed(headStart , value1, value0) -> tail {\n        tail := add(headStart, 64)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_address_to_t_address_fromStack(value1,  add(headStart, 32))\n\n    }\n\n    function store_literal_in_memory_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: seller doesn't appr\")\n\n        mstore(add(memPtr, 32), \"ove enough token to sell this it\")\n\n        mstore(add(memPtr, 64), \"em\")\n\n    }\n\n    function abi_encode_t_stringliteral_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 66)\n        store_literal_in_memory_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116(pos)\n        end := add(pos, 96)\n    }\n\n    function abi_encode_tuple_t_stringliteral_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: buyer doesn't have \")\n\n        mstore(add(memPtr, 32), \"enough token to buy this item\")\n\n    }\n\n    function abi_encode_t_stringliteral_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 61)\n        store_literal_in_memory_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9(memPtr) {\n\n        mstore(add(memPtr, 0), \"BETokenMall: buyer doesn't appro\")\n\n        mstore(add(memPtr, 32), \"ve enough token to buy this item\")\n\n    }\n\n    function abi_encode_t_stringliteral_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 64)\n        store_literal_in_memory_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_address_t_address_t_uint256_t_uint256__to_t_address_t_address_t_uint256_t_uint256__fromStack_reversed(headStart , value3, value2, value1, value0) -> tail {\n        tail := add(headStart, 128)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_address_to_t_address_fromStack(value1,  add(headStart, 32))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value2,  add(headStart, 64))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value3,  add(headStart, 96))\n\n    }\n\n    function store_literal_in_memory_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c(memPtr) {\n\n        mstore(add(memPtr, 0), \"address can not be zero\")\n\n    }\n\n    function abi_encode_t_stringliteral_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 23)\n        store_literal_in_memory_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_8acc3ee93e123270baeb206c430cf52b6f082d016072bd6f96b9fec703556e4c_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20 address is zero\")\n\n    }\n\n    function abi_encode_t_stringliteral_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 21)\n        store_literal_in_memory_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_3d1d4adcc59749b5d042ef099480f6d549cd45fbb220ca097fe0a691a2a937ef_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_address_t_uint256_t_uint256__to_t_address_t_uint256_t_uint256__fromStack_reversed(headStart , value2, value1, value0) -> tail {\n        tail := add(headStart, 96)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value1,  add(headStart, 32))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value2,  add(headStart, 64))\n\n    }\n\n    function store_literal_in_memory_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe(memPtr) {\n\n        mstore(add(memPtr, 0), \"Ownable: new owner is the zero a\")\n\n        mstore(add(memPtr, 32), \"ddress\")\n\n    }\n\n    function abi_encode_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 38)\n        store_literal_in_memory_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_245f15ff17f551913a7a18385165551503906a406f905ac1c2437281a7cd0cfe_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe(memPtr) {\n\n        mstore(add(memPtr, 0), \"Ownable: caller is not the owner\")\n\n    }\n\n    function abi_encode_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 32)\n        store_literal_in_memory_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_9924ebdf1add33d25d4ef888e16131f0a5687b0580a36c21b5c301a6c462effe_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619(memPtr) {\n\n        mstore(add(memPtr, 0), \"ReentrancyGuard: reentrant call\")\n\n    }\n\n    function abi_encode_t_stringliteral_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 31)\n        store_literal_in_memory_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_ebf73bba305590e4764d5cb53b69bffd6d4d092d1a67551cb346f8cfcdab8619_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_address_t_address_t_uint256__to_t_address_t_address_t_uint256__fromStack_reversed(headStart , value2, value1, value0) -> tail {\n        tail := add(headStart, 96)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_address_to_t_address_fromStack(value1,  add(headStart, 32))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value2,  add(headStart, 64))\n\n    }\n\n    function validator_revert_t_bool(value) {\n        if iszero(eq(value, cleanup_t_bool(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_bool_fromMemory(offset, end) -> value {\n        value := mload(offset)\n        validator_revert_t_bool(value)\n    }\n\n    function abi_decode_tuple_t_bool_fromMemory(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_bool_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function store_literal_in_memory_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd(memPtr) {\n\n        mstore(add(memPtr, 0), \"SafeERC20: ERC20 operation did n\")\n\n        mstore(add(memPtr, 32), \"ot succeed\")\n\n    }\n\n    function abi_encode_t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 42)\n        store_literal_in_memory_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function store_literal_in_memory_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c(memPtr) {\n\n        mstore(add(memPtr, 0), \"Address: insufficient balance fo\")\n\n        mstore(add(memPtr, 32), \"r call\")\n\n    }\n\n    function abi_encode_t_stringliteral_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 38)\n        store_literal_in_memory_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_565f1a77334fc4792800921178c71e4521acffab18ff9e7885b49377ee80ab4c_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function array_length_t_bytes_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack(pos, length) -> updated_pos {\n        updated_pos := pos\n    }\n\n    function copy_memory_to_memory(src, dst, length) {\n        let i := 0\n        for { } lt(i, length) { i := add(i, 32) }\n        {\n            mstore(add(dst, i), mload(add(src, i)))\n        }\n        if gt(i, length)\n        {\n            // clear end\n            mstore(add(dst, length), 0)\n        }\n    }\n\n    function abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value, pos) -> end {\n        let length := array_length_t_bytes_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, length)\n    }\n\n    function abi_encode_tuple_packed_t_bytes_memory_ptr__to_t_bytes_memory_ptr__nonPadded_inplace_fromStack_reversed(pos , value0) -> end {\n\n        pos := abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value0,  pos)\n\n        end := pos\n    }\n\n    function store_literal_in_memory_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad(memPtr) {\n\n        mstore(add(memPtr, 0), \"Address: call to non-contract\")\n\n    }\n\n    function abi_encode_t_stringliteral_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 29)\n        store_literal_in_memory_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_tuple_t_stringliteral_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_cc2e4e38850b7c0a3e942cfed89b71c77302df25bcb2ec297a0c4ff9ff6b90ad_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function array_length_t_string_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function round_up_to_mul_of_32(value) -> result {\n        result := and(add(value, 31), not(31))\n    }\n\n    function abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value, pos) -> end {\n        let length := array_length_t_string_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, round_up_to_mul_of_32(length))\n    }\n\n    function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value0,  tail)\n\n    }\n\n}\n",
       "id": 10,
       "language": "Yul",
       "name": "#utility.yul"
     }
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-  "source": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"../utils/UInt.sol\";\nimport \"./MallBase.sol\";\n\ninterface ICurrency is IERC20 {\n  function decimals() external view returns (uint256);\n}\n\ncontract BETokenMall is MallBase, ReentrancyGuard {\n  using SafeERC20 for IERC20;\n  using UInt for uint256;\n  uint256 constant ROUND = 1000000;\n  address public tokenAddress;\n  address public seller;\n  // currency => price\n  mapping(address => uint256) public prices;\n\n  // Events\n  event BuyTransaction(\n    address indexed buyer,\n    address tokenAddress,\n    address currency,\n    uint256 amount\n  );\n  event TokenAddressUpdated(address tokenAddress);\n  event SellerUpdated(address seller);\n  event UpdateTokenPrice(address currency, uint256 price, uint256 pricePre);\n\n  /**\n   * @dev Constructor\n   */\n  constructor(address _tokenAddress, address _seller) {\n    tokenAddress = _tokenAddress;\n    seller = _seller;\n  }\n\n  /**\n   * @dev Update token address\n   */\n  function updateTokenAddress(address _tokenAddress) external onlyOwner {\n    tokenAddress = _tokenAddress;\n    emit TokenAddressUpdated(_tokenAddress);\n  }\n\n  /**\n   * @dev Update seller address\n   */\n  function updateSeller(address _seller) external onlyOwner {\n    seller = _seller;\n    emit SellerUpdated(_seller);\n  }\n\n  /**\n   * @dev Update token price\n   */\n  function updateTokenPrice(\n    address currency,\n    uint256 price\n  ) external onlyOwner {\n    uint256 pricePre = prices[currency];\n    prices[currency] = price;\n    emit UpdateTokenPrice(currency, price, pricePre);\n  }\n\n  /**\n   * @dev Buy token\n   */\n  function buyToken(address currency, uint256 amount) external nonReentrant {\n    require(amount > 0, \"BETokenMall: invalid amount\");\n    require(erc20Supported[currency], \"BETokenMall: invalid payment method\");\n    require(prices[currency] > 0, \"BETokenMall: invalid token price\");\n    // calc currency amount\n    uint256 currencyDecimal = ICurrency(currency).decimals();\n    uint256 tokenAmount = (prices[currency] *\n      amount *\n      (10 ** (18 - currencyDecimal))) / ROUND;\n    address buyer = _msgSender();\n    require(\n      IERC20(tokenAddress).balanceOf(seller) >= tokenAmount,\n      \"BETokenMall: seller doesn't have enough token to sell this item\"\n    );\n    require(\n      IERC20(tokenAddress).allowance(seller, address(this)) >= tokenAmount,\n      \"BETokenMall: seller doesn't approve enough token to sell this item\"\n    );\n    // Check payment approval and buyer balance\n    require(\n      IERC20(currency).balanceOf(buyer) >= amount,\n      \"BETokenMall: buyer doesn't have enough token to buy this item\"\n    );\n    require(\n      IERC20(currency).allowance(buyer, address(this)) >= amount,\n      \"BETokenMall: buyer doesn't approve enough token to buy this item\"\n    );\n\n    // Transfer payment to seller\n    IERC20(currency).safeTransferFrom(buyer, feeToAddress, amount);\n    // Transfer token to buyer\n    IERC20(tokenAddress).safeTransferFrom(seller, buyer, tokenAmount);\n    // emit buy event\n    emit BuyTransaction(buyer, tokenAddress, currency, amount);\n  }\n}\n",
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+  "source": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.10;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"../utils/UInt.sol\";\nimport \"./MallBase.sol\";\n\ninterface ICurrency is IERC20 {\n  function decimals() external view returns (uint256);\n}\n\ncontract BETokenMall is MallBase, ReentrancyGuard {\n  using SafeERC20 for IERC20;\n  using UInt for uint256;\n  uint256 constant ROUND = 1000000;\n  address public tokenAddress;\n  address public seller;\n  // currency => price\n  mapping(address => uint256) public prices;\n\n  // Events\n  event BuyTransaction(\n    address indexed buyer,\n    address tokenAddress,\n    address currency,\n    uint256 amount,\n    uint256 tokenAmount\n  );\n  event TokenAddressUpdated(address tokenAddress);\n  event SellerUpdated(address seller);\n  event UpdateTokenPrice(address currency, uint256 price, uint256 pricePre);\n\n  /**\n   * @dev Constructor\n   */\n  constructor(address _tokenAddress, address _seller) {\n    tokenAddress = _tokenAddress;\n    seller = _seller;\n  }\n\n  /**\n   * @dev Update token address\n   */\n  function updateTokenAddress(address _tokenAddress) external onlyOwner {\n    tokenAddress = _tokenAddress;\n    emit TokenAddressUpdated(_tokenAddress);\n  }\n\n  /**\n   * @dev Update seller address\n   */\n  function updateSeller(address _seller) external onlyOwner {\n    seller = _seller;\n    emit SellerUpdated(_seller);\n  }\n\n  /**\n   * @dev Update token price\n   */\n  function updateTokenPrice(\n    address currency,\n    uint256 price\n  ) external onlyOwner {\n    uint256 pricePre = prices[currency];\n    prices[currency] = price;\n    emit UpdateTokenPrice(currency, price, pricePre);\n  }\n\n  /**\n   * @dev Buy token\n   */\n  function buyToken(address currency, uint256 amount) external nonReentrant {\n    require(amount > 0, \"BETokenMall: invalid amount\");\n    require(erc20Supported[currency], \"BETokenMall: invalid payment method\");\n    require(prices[currency] > 0, \"BETokenMall: invalid token price\");\n    // calc currency amount\n    uint256 currencyDecimal = ICurrency(currency).decimals();\n    uint256 tokenAmount = (prices[currency] *\n      amount *\n      (10 ** (18 - currencyDecimal))) / ROUND;\n    address buyer = _msgSender();\n    require(\n      IERC20(tokenAddress).balanceOf(seller) >= tokenAmount,\n      \"BETokenMall: seller doesn't have enough token to sell this item\"\n    );\n    require(\n      IERC20(tokenAddress).allowance(seller, address(this)) >= tokenAmount,\n      \"BETokenMall: seller doesn't approve enough token to sell this item\"\n    );\n    // Check payment approval and buyer balance\n    require(\n      IERC20(currency).balanceOf(buyer) >= amount,\n      \"BETokenMall: buyer doesn't have enough token to buy this item\"\n    );\n    require(\n      IERC20(currency).allowance(buyer, address(this)) >= amount,\n      \"BETokenMall: buyer doesn't approve enough token to buy this item\"\n    );\n\n    // Transfer payment to seller\n    IERC20(currency).safeTransferFrom(buyer, feeToAddress, amount);\n    // Transfer token to buyer\n    IERC20(tokenAddress).safeTransferFrom(seller, buyer, tokenAmount);\n    // emit buy event\n    emit BuyTransaction(buyer, tokenAddress, currency, amount, tokenAmount);\n  }\n}\n",
   "sourcePath": "/Users/zhl/Documents/workspace/crypto/becrypto/contracts/market/BETokenMall.sol",
   "ast": {
     "absolutePath": "project:/contracts/market/BETokenMall.sol",
@@ -12736,7 +12999,7 @@
         997
       ],
       "BETokenMall": [
-        1310
+        1313
       ],
       "Context": [
         1019
@@ -12751,7 +13014,7 @@
         291
       ],
       "MallBase": [
-        1423
+        1426
       ],
       "Ownable": [
         112
@@ -12763,10 +13026,10 @@
         667
       ],
       "UInt": [
-        1454
+        1457
       ]
     },
-    "id": 1311,
+    "id": 1314,
     "license": "MIT",
     "nodeType": "SourceUnit",
     "nodes": [
@@ -12786,7 +13049,7 @@
         "id": 1022,
         "nameLocation": "-1:-1:-1",
         "nodeType": "ImportDirective",
-        "scope": 1311,
+        "scope": 1314,
         "sourceUnit": 256,
         "src": "57:56:7",
         "symbolAliases": [],
@@ -12798,7 +13061,7 @@
         "id": 1023,
         "nameLocation": "-1:-1:-1",
         "nodeType": "ImportDirective",
-        "scope": 1311,
+        "scope": 1314,
         "sourceUnit": 668,
         "src": "114:65:7",
         "symbolAliases": [],
@@ -12810,7 +13073,7 @@
         "id": 1024,
         "nameLocation": "-1:-1:-1",
         "nodeType": "ImportDirective",
-        "scope": 1311,
+        "scope": 1314,
         "sourceUnit": 178,
         "src": "180:62:7",
         "symbolAliases": [],
@@ -12822,8 +13085,8 @@
         "id": 1025,
         "nameLocation": "-1:-1:-1",
         "nodeType": "ImportDirective",
-        "scope": 1311,
-        "sourceUnit": 1455,
+        "scope": 1314,
+        "sourceUnit": 1458,
         "src": "243:27:7",
         "symbolAliases": [],
         "unitAlias": ""
@@ -12834,8 +13097,8 @@
         "id": 1026,
         "nameLocation": "-1:-1:-1",
         "nodeType": "ImportDirective",
-        "scope": 1311,
-        "sourceUnit": 1424,
+        "scope": 1314,
+        "sourceUnit": 1427,
         "src": "271:24:7",
         "symbolAliases": [],
         "unitAlias": ""
@@ -12925,7 +13188,7 @@
             "visibility": "external"
           }
         ],
-        "scope": 1311,
+        "scope": 1314,
         "src": "297:88:7",
         "usedErrors": []
       },
@@ -12937,7 +13200,7 @@
               "id": 1035,
               "name": "MallBase",
               "nodeType": "IdentifierPath",
-              "referencedDeclaration": 1423,
+              "referencedDeclaration": 1426,
               "src": "411:8:7"
             },
             "id": 1036,
@@ -12961,11 +13224,11 @@
         "contractDependencies": [],
         "contractKind": "contract",
         "fullyImplemented": true,
-        "id": 1310,
+        "id": 1313,
         "linearizedBaseContracts": [
-          1310,
+          1313,
           177,
-          1423,
+          1426,
           112,
           1019
         ],
@@ -13008,7 +13271,7 @@
               "id": 1043,
               "name": "UInt",
               "nodeType": "IdentifierPath",
-              "referencedDeclaration": 1454,
+              "referencedDeclaration": 1457,
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@@ -13031,7 +13294,7 @@
             "name": "ROUND",
             "nameLocation": "514:5:7",
             "nodeType": "VariableDeclaration",
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@@ -13075,7 +13338,7 @@
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@@ -13104,7 +13367,7 @@
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@@ -13133,7 +13396,7 @@
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@@ -13174,12 +13437,12 @@
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@@ -13190,7 +13453,7 @@
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@@ -13219,7 +13482,7 @@
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@@ -13248,7 +13511,7 @@
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@@ -13277,7 +13540,7 @@
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@@ -13296,149 +13559,17 @@
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@@ -13446,27 +13577,159 @@
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                       "typeString": "uint256"
                     }
                   },
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+                      "typeString": "address"
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+                    "stateMutability": "nonpayable",
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                 },
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                   "constant": false,
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                   "indexed": false,
                   "mutability": "mutable",
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                   "nodeType": "VariableDeclaration",
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@@ -13477,7 +13740,35 @@
                     "id": 1079,
                     "name": "uint256",
                     "nodeType": "ElementaryTypeName",
-                    "src": "939:7:7",
+                    "src": "949:7:7",
+                    "typeDescriptions": {
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+                      "typeString": "uint256"
+                    }
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+                  "visibility": "internal"
+                },
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+                  "id": 1082,
+                  "indexed": false,
+                  "mutability": "mutable",
+                  "name": "pricePre",
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+                  "nodeType": "VariableDeclaration",
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+                  "src": "964:16:7",
+                  "stateVariable": false,
+                  "storageLocation": "default",
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+                    "typeString": "uint256"
+                  },
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+                    "name": "uint256",
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                     "typeDescriptions": {
                       "typeIdentifier": "t_uint256",
                       "typeString": "uint256"
@@ -13486,30 +13777,30 @@
                   "visibility": "internal"
                 }
               ],
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                     "leftHandSide": {
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                       "overloadedDeclarations": [],
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-                      "src": "1053:12:7",
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                         "typeString": "address"
@@ -13518,41 +13809,41 @@
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                         "typeString": "address"
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@@ -13561,36 +13852,36 @@
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                         "typeString": "address"
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               ]
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+              "id": 1085,
               "nodeType": "StructuredDocumentation",
-              "src": "961:31:7",
+              "src": "986:31:7",
               "text": " @dev Constructor"
             },
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@@ -13598,46 +13889,18 @@
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                   "mutability": "mutable",
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@@ -13648,7 +13911,35 @@
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                     "name": "address",
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-                    "src": "1030:7:7",
+                    "src": "1032:7:7",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
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+                  "mutability": "mutable",
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+                  "storageLocation": "default",
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+                    "typeString": "address"
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+                    "name": "address",
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@@ -13658,40 +13949,40 @@
                   "visibility": "internal"
                 }
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+              "src": "1031:40:7"
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             "visibility": "public"
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-                      "src": "1231:12:7",
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                         "typeString": "address"
@@ -13700,37 +13991,37 @@
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-                      "src": "1246:13:7",
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                         "typeString": "address"
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                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1102,
-                        "src": "1290:13:7",
+                        "referencedDeclaration": 1104,
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                           "typeString": "address"
@@ -13744,18 +14035,18 @@
                           "typeString": "address"
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                         "typeString": "function (address)"
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@@ -14381,18 +14672,18 @@
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                         "typeDescriptions": {
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                           "typeString": "literal_string \"BETokenMall: invalid amount\""
@@ -14450,7 +14741,7 @@
                           "typeString": "literal_string \"BETokenMall: invalid amount\""
                         }
                       ],
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@@ -14458,13 +14749,13 @@
                         4294967278
                       ],
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                         "typeString": "function (bool,string memory) pure"
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@@ -14472,41 +14763,41 @@
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                       "typeString": "tuple()"
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                     "arguments": [
                       {
                         "baseExpression": {
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+                          "id": 1182,
                           "name": "erc20Supported",
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+                          "referencedDeclaration": 1326,
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                           "typeDescriptions": {
                             "typeIdentifier": "t_mapping$_t_address_$_t_bool_$",
                             "typeString": "mapping(address => bool)"
                           }
                         },
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+                        "id": 1184,
                         "indexExpression": {
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+                          "id": 1183,
                           "name": "currency",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
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-                          "src": "1935:8:7",
+                          "referencedDeclaration": 1167,
+                          "src": "1960:8:7",
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                             "typeIdentifier": "t_address",
                             "typeString": "address"
@@ -14517,7 +14808,7 @@
                         "isPure": false,
                         "lValueRequested": false,
                         "nodeType": "IndexAccess",
-                        "src": "1920:24:7",
+                        "src": "1945:24:7",
                         "typeDescriptions": {
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                           "typeString": "bool"
@@ -14525,14 +14816,14 @@
                       },
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                         "kind": "string",
                         "lValueRequested": false,
                         "nodeType": "Literal",
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                           "typeString": "literal_string \"BETokenMall: invalid payment method\""
@@ -14551,7 +14842,7 @@
                           "typeString": "literal_string \"BETokenMall: invalid payment method\""
                         }
                       ],
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+                      "id": 1181,
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@@ -14559,13 +14850,13 @@
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                       ],
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                         "typeString": "function (bool,string memory) pure"
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@@ -14573,16 +14864,16 @@
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@@ -14592,32 +14883,32 @@
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
                         },
-                        "id": 1191,
+                        "id": 1193,
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                         "lValueRequested": false,
                         "leftExpression": {
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+                            "id": 1189,
                             "name": "prices",
                             "nodeType": "Identifier",
                             "overloadedDeclarations": [],
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-                            "src": "1998:6:7",
+                            "src": "2023:6:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                               "typeString": "mapping(address => uint256)"
                             }
                           },
-                          "id": 1189,
+                          "id": 1191,
                           "indexExpression": {
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+                            "id": 1190,
                             "name": "currency",
                             "nodeType": "Identifier",
                             "overloadedDeclarations": [],
-                            "referencedDeclaration": 1165,
-                            "src": "2005:8:7",
+                            "referencedDeclaration": 1167,
+                            "src": "2030:8:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_address",
                               "typeString": "address"
@@ -14628,7 +14919,7 @@
                           "isPure": false,
                           "lValueRequested": false,
                           "nodeType": "IndexAccess",
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+                          "src": "2023:16:7",
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                             "typeString": "uint256"
@@ -14638,21 +14929,21 @@
                         "operator": ">",
                         "rightExpression": {
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+                          "id": 1192,
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                           "kind": "number",
                           "lValueRequested": false,
                           "nodeType": "Literal",
-                          "src": "2017:1:7",
+                          "src": "2042:1:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_rational_0_by_1",
                             "typeString": "int_const 0"
                           },
                           "value": "0"
                         },
-                        "src": "1998:20:7",
+                        "src": "2023:20:7",
                         "typeDescriptions": {
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                           "typeString": "bool"
@@ -14660,14 +14951,14 @@
                       },
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                         "kind": "string",
                         "lValueRequested": false,
                         "nodeType": "Literal",
-                        "src": "2020:34:7",
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                           "typeString": "literal_string \"BETokenMall: invalid token price\""
@@ -14686,7 +14977,7 @@
                           "typeString": "literal_string \"BETokenMall: invalid token price\""
                         }
                       ],
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@@ -14694,13 +14985,13 @@
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                         "typeString": "function (bool,string memory) pure"
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@@ -14708,31 +14999,31 @@
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+                    "src": "2015:65:7",
                     "tryCall": false,
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                       "typeString": "tuple()"
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+                  "src": "2015:65:7"
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                       "name": "currencyDecimal",
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                       "nodeType": "VariableDeclaration",
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@@ -14740,10 +15031,10 @@
                         "typeString": "uint256"
                       },
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+                        "id": 1197,
                         "name": "uint256",
                         "nodeType": "ElementaryTypeName",
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                         "typeDescriptions": {
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                           "typeString": "uint256"
@@ -14752,7 +15043,7 @@
                       "visibility": "internal"
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@@ -14760,12 +15051,12 @@
                       "expression": {
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+                            "id": 1200,
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                               "typeString": "address"
@@ -14779,18 +15070,18 @@
                               "typeString": "address"
                             }
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+                          "id": 1199,
                           "name": "ICurrency",
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-                          "src": "2115:9:7",
+                          "src": "2140:9:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_type$_t_contract$_ICurrency_$1034_$",
                             "typeString": "type(contract ICurrency)"
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                         },
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@@ -14798,14 +15089,14 @@
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+                        "src": "2140:19:7",
                         "tryCall": false,
                         "typeDescriptions": {
                           "typeIdentifier": "t_contract$_ICurrency_$1034",
                           "typeString": "contract ICurrency"
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@@ -14813,13 +15104,13 @@
                       "memberName": "decimals",
                       "nodeType": "MemberAccess",
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-                      "src": "2115:28:7",
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                       "typeDescriptions": {
                         "typeIdentifier": "t_function_external_view$__$returns$_t_uint256_$",
                         "typeString": "function () view external returns (uint256)"
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@@ -14827,7 +15118,7 @@
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@@ -14835,22 +15126,22 @@
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+                      "id": 1206,
                       "mutability": "mutable",
                       "name": "tokenAmount",
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@@ -14858,10 +15149,10 @@
                         "typeString": "uint256"
                       },
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+                        "id": 1205,
                         "name": "uint256",
                         "nodeType": "ElementaryTypeName",
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                         "typeDescriptions": {
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                           "typeString": "uint256"
@@ -14870,13 +15161,13 @@
                       "visibility": "internal"
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@@ -14888,7 +15179,7 @@
                             "typeIdentifier": "t_uint256",
                             "typeString": "uint256"
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@@ -14898,32 +15189,32 @@
                               "typeIdentifier": "t_uint256",
                               "typeString": "uint256"
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+                                "id": 1207,
                                 "name": "prices",
                                 "nodeType": "Identifier",
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+                                "src": "2199:6:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                                   "typeString": "mapping(address => uint256)"
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                               },
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+                              "id": 1209,
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+                                "id": 1208,
                                 "name": "currency",
                                 "nodeType": "Identifier",
                                 "overloadedDeclarations": [],
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+                                "referencedDeclaration": 1167,
+                                "src": "2206:8:7",
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                                   "typeString": "address"
@@ -14934,7 +15225,7 @@
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                                 "typeString": "uint256"
@@ -14943,18 +15234,18 @@
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                             "operator": "*",
                             "rightExpression": {
-                              "id": 1208,
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                               "name": "amount",
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                               "typeDescriptions": {
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                                 "typeString": "uint256"
                               }
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@@ -14969,21 +15260,21 @@
                                   "typeIdentifier": "t_uint256",
                                   "typeString": "uint256"
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                                     "typeString": "int_const 10"
@@ -14999,21 +15290,21 @@
                                         "typeIdentifier": "t_uint256",
                                         "typeString": "uint256"
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+                                        "src": "2247:2:7",
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                                           "typeString": "int_const 18"
@@ -15023,72 +15314,72 @@
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                                       "operator": "-",
                                       "rightExpression": {
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+                                        "id": 1214,
                                         "name": "currencyDecimal",
                                         "nodeType": "Identifier",
                                         "overloadedDeclarations": [],
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+                                        "referencedDeclaration": 1198,
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                                         "typeDescriptions": {
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                                           "typeString": "uint256"
                                         }
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+                                      "src": "2247:20:7",
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                                         "typeString": "uint256"
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                                   "nodeType": "TupleExpression",
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+                                  "src": "2246:22:7",
                                   "typeDescriptions": {
                                     "typeIdentifier": "t_uint256",
                                     "typeString": "uint256"
                                   }
                                 },
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+                                "src": "2240:28:7",
                                 "typeDescriptions": {
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                                   "typeString": "uint256"
                                 }
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+                            "src": "2239:30:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_uint256",
                               "typeString": "uint256"
                             }
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+                          "src": "2199:70:7",
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                             "typeString": "uint256"
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@@ -15097,40 +15388,40 @@
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                         "typeString": "uint256"
                       }
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-                    "src": "2173:80:7",
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                       "typeString": "uint256"
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+                  "src": "2176:102:7"
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                       "name": "buyer",
-                      "nameLocation": "2267:5:7",
+                      "nameLocation": "2292:5:7",
                       "nodeType": "VariableDeclaration",
-                      "scope": 1308,
-                      "src": "2259:13:7",
+                      "scope": 1311,
+                      "src": "2284:13:7",
                       "stateVariable": false,
                       "storageLocation": "default",
                       "typeDescriptions": {
@@ -15138,10 +15429,10 @@
                         "typeString": "address"
                       },
                       "typeName": {
-                        "id": 1222,
+                        "id": 1224,
                         "name": "address",
                         "nodeType": "ElementaryTypeName",
-                        "src": "2259:7:7",
+                        "src": "2284:7:7",
                         "stateMutability": "nonpayable",
                         "typeDescriptions": {
                           "typeIdentifier": "t_address",
@@ -15151,23 +15442,23 @@
                       "visibility": "internal"
                     }
                   ],
-                  "id": 1226,
+                  "id": 1228,
                   "initialValue": {
                     "arguments": [],
                     "expression": {
                       "argumentTypes": [],
-                      "id": 1224,
+                      "id": 1226,
                       "name": "_msgSender",
                       "nodeType": "Identifier",
                       "overloadedDeclarations": [],
                       "referencedDeclaration": 1009,
-                      "src": "2275:10:7",
+                      "src": "2300:10:7",
                       "typeDescriptions": {
                         "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$",
                         "typeString": "function () view returns (address)"
                       }
                     },
-                    "id": 1225,
+                    "id": 1227,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -15175,7 +15466,7 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "2275:12:7",
+                    "src": "2300:12:7",
                     "tryCall": false,
                     "typeDescriptions": {
                       "typeIdentifier": "t_address",
@@ -15183,7 +15474,7 @@
                     }
                   },
                   "nodeType": "VariableDeclarationStatement",
-                  "src": "2259:28:7"
+                  "src": "2284:28:7"
                 },
                 {
                   "expression": {
@@ -15193,7 +15484,7 @@
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
                         },
-                        "id": 1235,
+                        "id": 1237,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": false,
@@ -15201,12 +15492,12 @@
                         "leftExpression": {
                           "arguments": [
                             {
-                              "id": 1232,
+                              "id": 1234,
                               "name": "seller",
                               "nodeType": "Identifier",
                               "overloadedDeclarations": [],
                               "referencedDeclaration": 1052,
-                              "src": "2339:6:7",
+                              "src": "2364:6:7",
                               "typeDescriptions": {
                                 "typeIdentifier": "t_address",
                                 "typeString": "address"
@@ -15223,12 +15514,12 @@
                             "expression": {
                               "arguments": [
                                 {
-                                  "id": 1229,
+                                  "id": 1231,
                                   "name": "tokenAddress",
                                   "nodeType": "Identifier",
                                   "overloadedDeclarations": [],
                                   "referencedDeclaration": 1050,
-                                  "src": "2315:12:7",
+                                  "src": "2340:12:7",
                                   "typeDescriptions": {
                                     "typeIdentifier": "t_address",
                                     "typeString": "address"
@@ -15242,18 +15533,18 @@
                                     "typeString": "address"
                                   }
                                 ],
-                                "id": 1228,
+                                "id": 1230,
                                 "name": "IERC20",
                                 "nodeType": "Identifier",
                                 "overloadedDeclarations": [],
                                 "referencedDeclaration": 255,
-                                "src": "2308:6:7",
+                                "src": "2333:6:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_type$_t_contract$_IERC20_$255_$",
                                   "typeString": "type(contract IERC20)"
                                 }
                               },
-                              "id": 1230,
+                              "id": 1232,
                               "isConstant": false,
                               "isLValue": false,
                               "isPure": false,
@@ -15261,14 +15552,14 @@
                               "lValueRequested": false,
                               "names": [],
                               "nodeType": "FunctionCall",
-                              "src": "2308:20:7",
+                              "src": "2333:20:7",
                               "tryCall": false,
                               "typeDescriptions": {
                                 "typeIdentifier": "t_contract$_IERC20_$255",
                                 "typeString": "contract IERC20"
                               }
                             },
-                            "id": 1231,
+                            "id": 1233,
                             "isConstant": false,
                             "isLValue": false,
                             "isPure": false,
@@ -15276,13 +15567,13 @@
                             "memberName": "balanceOf",
                             "nodeType": "MemberAccess",
                             "referencedDeclaration": 212,
-                            "src": "2308:30:7",
+                            "src": "2333:30:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_function_external_view$_t_address_$returns$_t_uint256_$",
                               "typeString": "function (address) view external returns (uint256)"
                             }
                           },
-                          "id": 1233,
+                          "id": 1235,
                           "isConstant": false,
                           "isLValue": false,
                           "isPure": false,
@@ -15290,7 +15581,7 @@
                           "lValueRequested": false,
                           "names": [],
                           "nodeType": "FunctionCall",
-                          "src": "2308:38:7",
+                          "src": "2333:38:7",
                           "tryCall": false,
                           "typeDescriptions": {
                             "typeIdentifier": "t_uint256",
@@ -15300,18 +15591,18 @@
                         "nodeType": "BinaryOperation",
                         "operator": ">=",
                         "rightExpression": {
-                          "id": 1234,
+                          "id": 1236,
                           "name": "tokenAmount",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
-                          "referencedDeclaration": 1204,
-                          "src": "2350:11:7",
+                          "referencedDeclaration": 1206,
+                          "src": "2375:11:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_uint256",
                             "typeString": "uint256"
                           }
                         },
-                        "src": "2308:53:7",
+                        "src": "2333:53:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bool",
                           "typeString": "bool"
@@ -15319,14 +15610,14 @@
                       },
                       {
                         "hexValue": "4245546f6b656e4d616c6c3a2073656c6c657220646f65736e2774206861766520656e6f75676820746f6b656e20746f2073656c6c2074686973206974656d",
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                         "isPure": true,
                         "kind": "string",
                         "lValueRequested": false,
                         "nodeType": "Literal",
-                        "src": "2369:65:7",
+                        "src": "2394:65:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_stringliteral_73f0bd8e523cff2e504592c44e9195f4613827bfc123cfd9764579cdf471a09e",
                           "typeString": "literal_string \"BETokenMall: seller doesn't have enough token to sell this item\""
@@ -15345,7 +15636,7 @@
                           "typeString": "literal_string \"BETokenMall: seller doesn't have enough token to sell this item\""
                         }
                       ],
-                      "id": 1227,
+                      "id": 1229,
                       "name": "require",
                       "nodeType": "Identifier",
                       "overloadedDeclarations": [
@@ -15353,13 +15644,13 @@
                         4294967278
                       ],
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                         "typeString": "function (bool,string memory) pure"
                       }
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+                    "id": 1239,
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@@ -15367,16 +15658,16 @@
                     "lValueRequested": false,
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                     "nodeType": "FunctionCall",
-                    "src": "2293:147:7",
+                    "src": "2318:147:7",
                     "tryCall": false,
                     "typeDescriptions": {
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                       "typeString": "tuple()"
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@@ -15386,7 +15677,7 @@
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
                         },
-                        "id": 1251,
+                        "id": 1253,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": false,
@@ -15394,12 +15685,12 @@
                         "leftExpression": {
                           "arguments": [
                             {
-                              "id": 1244,
+                              "id": 1246,
                               "name": "seller",
                               "nodeType": "Identifier",
                               "overloadedDeclarations": [],
                               "referencedDeclaration": 1052,
-                              "src": "2492:6:7",
+                              "src": "2517:6:7",
                               "typeDescriptions": {
                                 "typeIdentifier": "t_address",
                                 "typeString": "address"
@@ -15408,14 +15699,14 @@
                             {
                               "arguments": [
                                 {
-                                  "id": 1247,
+                                  "id": 1249,
                                   "name": "this",
                                   "nodeType": "Identifier",
                                   "overloadedDeclarations": [],
                                   "referencedDeclaration": 4294967268,
-                                  "src": "2508:4:7",
+                                  "src": "2533:4:7",
                                   "typeDescriptions": {
-                                    "typeIdentifier": "t_contract$_BETokenMall_$1310",
+                                    "typeIdentifier": "t_contract$_BETokenMall_$1313",
                                     "typeString": "contract BETokenMall"
                                   }
                                 }
@@ -15423,30 +15714,30 @@
                               "expression": {
                                 "argumentTypes": [
                                   {
-                                    "typeIdentifier": "t_contract$_BETokenMall_$1310",
+                                    "typeIdentifier": "t_contract$_BETokenMall_$1313",
                                     "typeString": "contract BETokenMall"
                                   }
                                 ],
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+                                "id": 1248,
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                                 "isPure": true,
                                 "lValueRequested": false,
                                 "nodeType": "ElementaryTypeNameExpression",
-                                "src": "2500:7:7",
+                                "src": "2525:7:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_type$_t_address_$",
                                   "typeString": "type(address)"
                                 },
                                 "typeName": {
-                                  "id": 1245,
+                                  "id": 1247,
                                   "name": "address",
                                   "nodeType": "ElementaryTypeName",
-                                  "src": "2500:7:7",
+                                  "src": "2525:7:7",
                                   "typeDescriptions": {}
                                 }
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+                              "id": 1250,
                               "isConstant": false,
                               "isLValue": false,
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@@ -15454,7 +15745,7 @@
                               "lValueRequested": false,
                               "names": [],
                               "nodeType": "FunctionCall",
-                              "src": "2500:13:7",
+                              "src": "2525:13:7",
                               "tryCall": false,
                               "typeDescriptions": {
                                 "typeIdentifier": "t_address",
@@ -15476,12 +15767,12 @@
                             "expression": {
                               "arguments": [
                                 {
-                                  "id": 1241,
+                                  "id": 1243,
                                   "name": "tokenAddress",
                                   "nodeType": "Identifier",
                                   "overloadedDeclarations": [],
                                   "referencedDeclaration": 1050,
-                                  "src": "2468:12:7",
+                                  "src": "2493:12:7",
                                   "typeDescriptions": {
                                     "typeIdentifier": "t_address",
                                     "typeString": "address"
@@ -15495,18 +15786,18 @@
                                     "typeString": "address"
                                   }
                                 ],
-                                "id": 1240,
+                                "id": 1242,
                                 "name": "IERC20",
                                 "nodeType": "Identifier",
                                 "overloadedDeclarations": [],
                                 "referencedDeclaration": 255,
-                                "src": "2461:6:7",
+                                "src": "2486:6:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_type$_t_contract$_IERC20_$255_$",
                                   "typeString": "type(contract IERC20)"
                                 }
                               },
-                              "id": 1242,
+                              "id": 1244,
                               "isConstant": false,
                               "isLValue": false,
                               "isPure": false,
@@ -15514,14 +15805,14 @@
                               "lValueRequested": false,
                               "names": [],
                               "nodeType": "FunctionCall",
-                              "src": "2461:20:7",
+                              "src": "2486:20:7",
                               "tryCall": false,
                               "typeDescriptions": {
                                 "typeIdentifier": "t_contract$_IERC20_$255",
                                 "typeString": "contract IERC20"
                               }
                             },
-                            "id": 1243,
+                            "id": 1245,
                             "isConstant": false,
                             "isLValue": false,
                             "isPure": false,
@@ -15529,13 +15820,13 @@
                             "memberName": "allowance",
                             "nodeType": "MemberAccess",
                             "referencedDeclaration": 232,
-                            "src": "2461:30:7",
+                            "src": "2486:30:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$",
                               "typeString": "function (address,address) view external returns (uint256)"
                             }
                           },
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+                          "id": 1251,
                           "isConstant": false,
                           "isLValue": false,
                           "isPure": false,
@@ -15543,7 +15834,7 @@
                           "lValueRequested": false,
                           "names": [],
                           "nodeType": "FunctionCall",
-                          "src": "2461:53:7",
+                          "src": "2486:53:7",
                           "tryCall": false,
                           "typeDescriptions": {
                             "typeIdentifier": "t_uint256",
@@ -15553,18 +15844,18 @@
                         "nodeType": "BinaryOperation",
                         "operator": ">=",
                         "rightExpression": {
-                          "id": 1250,
+                          "id": 1252,
                           "name": "tokenAmount",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
-                          "referencedDeclaration": 1204,
-                          "src": "2518:11:7",
+                          "referencedDeclaration": 1206,
+                          "src": "2543:11:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_uint256",
                             "typeString": "uint256"
                           }
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-                        "src": "2461:68:7",
+                        "src": "2486:68:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bool",
                           "typeString": "bool"
@@ -15572,14 +15863,14 @@
                       },
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                         "isPure": true,
                         "kind": "string",
                         "lValueRequested": false,
                         "nodeType": "Literal",
-                        "src": "2537:68:7",
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                         "typeDescriptions": {
                           "typeIdentifier": "t_stringliteral_b12657b3b75653fe46056178646066dddbc146c37547191bc3f6947332d91116",
                           "typeString": "literal_string \"BETokenMall: seller doesn't approve enough token to sell this item\""
@@ -15598,7 +15889,7 @@
                           "typeString": "literal_string \"BETokenMall: seller doesn't approve enough token to sell this item\""
                         }
                       ],
-                      "id": 1239,
+                      "id": 1241,
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                       "nodeType": "Identifier",
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@@ -15606,13 +15897,13 @@
                         4294967278
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                       "typeDescriptions": {
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                         "typeString": "function (bool,string memory) pure"
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+                    "id": 1255,
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                     "isPure": false,
@@ -15620,16 +15911,16 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "2446:165:7",
+                    "src": "2471:165:7",
                     "tryCall": false,
                     "typeDescriptions": {
                       "typeIdentifier": "t_tuple$__$",
                       "typeString": "tuple()"
                     }
                   },
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+                  "id": 1256,
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-                  "src": "2446:165:7"
+                  "src": "2471:165:7"
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                 {
                   "expression": {
@@ -15639,7 +15930,7 @@
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
                         },
-                        "id": 1263,
+                        "id": 1265,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": false,
@@ -15647,12 +15938,12 @@
                         "leftExpression": {
                           "arguments": [
                             {
-                              "id": 1260,
+                              "id": 1262,
                               "name": "buyer",
                               "nodeType": "Identifier",
                               "overloadedDeclarations": [],
-                              "referencedDeclaration": 1223,
-                              "src": "2707:5:7",
+                              "referencedDeclaration": 1225,
+                              "src": "2732:5:7",
                               "typeDescriptions": {
                                 "typeIdentifier": "t_address",
                                 "typeString": "address"
@@ -15669,12 +15960,12 @@
                             "expression": {
                               "arguments": [
                                 {
-                                  "id": 1257,
+                                  "id": 1259,
                                   "name": "currency",
                                   "nodeType": "Identifier",
                                   "overloadedDeclarations": [],
-                                  "referencedDeclaration": 1165,
-                                  "src": "2687:8:7",
+                                  "referencedDeclaration": 1167,
+                                  "src": "2712:8:7",
                                   "typeDescriptions": {
                                     "typeIdentifier": "t_address",
                                     "typeString": "address"
@@ -15688,18 +15979,18 @@
                                     "typeString": "address"
                                   }
                                 ],
-                                "id": 1256,
+                                "id": 1258,
                                 "name": "IERC20",
                                 "nodeType": "Identifier",
                                 "overloadedDeclarations": [],
                                 "referencedDeclaration": 255,
-                                "src": "2680:6:7",
+                                "src": "2705:6:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_type$_t_contract$_IERC20_$255_$",
                                   "typeString": "type(contract IERC20)"
                                 }
                               },
-                              "id": 1258,
+                              "id": 1260,
                               "isConstant": false,
                               "isLValue": false,
                               "isPure": false,
@@ -15707,14 +15998,14 @@
                               "lValueRequested": false,
                               "names": [],
                               "nodeType": "FunctionCall",
-                              "src": "2680:16:7",
+                              "src": "2705:16:7",
                               "tryCall": false,
                               "typeDescriptions": {
                                 "typeIdentifier": "t_contract$_IERC20_$255",
                                 "typeString": "contract IERC20"
                               }
                             },
-                            "id": 1259,
+                            "id": 1261,
                             "isConstant": false,
                             "isLValue": false,
                             "isPure": false,
@@ -15722,13 +16013,13 @@
                             "memberName": "balanceOf",
                             "nodeType": "MemberAccess",
                             "referencedDeclaration": 212,
-                            "src": "2680:26:7",
+                            "src": "2705:26:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_function_external_view$_t_address_$returns$_t_uint256_$",
                               "typeString": "function (address) view external returns (uint256)"
                             }
                           },
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+                          "id": 1263,
                           "isConstant": false,
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                           "isPure": false,
@@ -15736,7 +16027,7 @@
                           "lValueRequested": false,
                           "names": [],
                           "nodeType": "FunctionCall",
-                          "src": "2680:33:7",
+                          "src": "2705:33:7",
                           "tryCall": false,
                           "typeDescriptions": {
                             "typeIdentifier": "t_uint256",
@@ -15746,18 +16037,18 @@
                         "nodeType": "BinaryOperation",
                         "operator": ">=",
                         "rightExpression": {
-                          "id": 1262,
+                          "id": 1264,
                           "name": "amount",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
-                          "referencedDeclaration": 1167,
-                          "src": "2717:6:7",
+                          "referencedDeclaration": 1169,
+                          "src": "2742:6:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_uint256",
                             "typeString": "uint256"
                           }
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-                        "src": "2680:43:7",
+                        "src": "2705:43:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bool",
                           "typeString": "bool"
@@ -15765,14 +16056,14 @@
                       },
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                         "isPure": true,
                         "kind": "string",
                         "lValueRequested": false,
                         "nodeType": "Literal",
-                        "src": "2731:63:7",
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                         "typeDescriptions": {
                           "typeIdentifier": "t_stringliteral_980c03874b76c6d251144dea5acdce60498a10f246b9b561224499303c2b93f7",
                           "typeString": "literal_string \"BETokenMall: buyer doesn't have enough token to buy this item\""
@@ -15791,7 +16082,7 @@
                           "typeString": "literal_string \"BETokenMall: buyer doesn't have enough token to buy this item\""
                         }
                       ],
-                      "id": 1255,
+                      "id": 1257,
                       "name": "require",
                       "nodeType": "Identifier",
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@@ -15799,13 +16090,13 @@
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                         "typeString": "function (bool,string memory) pure"
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+                    "id": 1267,
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@@ -15813,16 +16104,16 @@
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                       "typeString": "tuple()"
                     }
                   },
-                  "id": 1266,
+                  "id": 1268,
                   "nodeType": "ExpressionStatement",
-                  "src": "2665:135:7"
+                  "src": "2690:135:7"
                 },
                 {
                   "expression": {
@@ -15832,7 +16123,7 @@
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
                         },
-                        "id": 1279,
+                        "id": 1281,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": false,
@@ -15840,12 +16131,12 @@
                         "leftExpression": {
                           "arguments": [
                             {
-                              "id": 1272,
+                              "id": 1274,
                               "name": "buyer",
                               "nodeType": "Identifier",
                               "overloadedDeclarations": [],
-                              "referencedDeclaration": 1223,
-                              "src": "2848:5:7",
+                              "referencedDeclaration": 1225,
+                              "src": "2873:5:7",
                               "typeDescriptions": {
                                 "typeIdentifier": "t_address",
                                 "typeString": "address"
@@ -15854,14 +16145,14 @@
                             {
                               "arguments": [
                                 {
-                                  "id": 1275,
+                                  "id": 1277,
                                   "name": "this",
                                   "nodeType": "Identifier",
                                   "overloadedDeclarations": [],
                                   "referencedDeclaration": 4294967268,
-                                  "src": "2863:4:7",
+                                  "src": "2888:4:7",
                                   "typeDescriptions": {
-                                    "typeIdentifier": "t_contract$_BETokenMall_$1310",
+                                    "typeIdentifier": "t_contract$_BETokenMall_$1313",
                                     "typeString": "contract BETokenMall"
                                   }
                                 }
@@ -15869,30 +16160,30 @@
                               "expression": {
                                 "argumentTypes": [
                                   {
-                                    "typeIdentifier": "t_contract$_BETokenMall_$1310",
+                                    "typeIdentifier": "t_contract$_BETokenMall_$1313",
                                     "typeString": "contract BETokenMall"
                                   }
                                 ],
-                                "id": 1274,
+                                "id": 1276,
                                 "isConstant": false,
                                 "isLValue": false,
                                 "isPure": true,
                                 "lValueRequested": false,
                                 "nodeType": "ElementaryTypeNameExpression",
-                                "src": "2855:7:7",
+                                "src": "2880:7:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_type$_t_address_$",
                                   "typeString": "type(address)"
                                 },
                                 "typeName": {
-                                  "id": 1273,
+                                  "id": 1275,
                                   "name": "address",
                                   "nodeType": "ElementaryTypeName",
-                                  "src": "2855:7:7",
+                                  "src": "2880:7:7",
                                   "typeDescriptions": {}
                                 }
                               },
-                              "id": 1276,
+                              "id": 1278,
                               "isConstant": false,
                               "isLValue": false,
                               "isPure": false,
@@ -15900,7 +16191,7 @@
                               "lValueRequested": false,
                               "names": [],
                               "nodeType": "FunctionCall",
-                              "src": "2855:13:7",
+                              "src": "2880:13:7",
                               "tryCall": false,
                               "typeDescriptions": {
                                 "typeIdentifier": "t_address",
@@ -15922,12 +16213,12 @@
                             "expression": {
                               "arguments": [
                                 {
-                                  "id": 1269,
+                                  "id": 1271,
                                   "name": "currency",
                                   "nodeType": "Identifier",
                                   "overloadedDeclarations": [],
-                                  "referencedDeclaration": 1165,
-                                  "src": "2828:8:7",
+                                  "referencedDeclaration": 1167,
+                                  "src": "2853:8:7",
                                   "typeDescriptions": {
                                     "typeIdentifier": "t_address",
                                     "typeString": "address"
@@ -15941,18 +16232,18 @@
                                     "typeString": "address"
                                   }
                                 ],
-                                "id": 1268,
+                                "id": 1270,
                                 "name": "IERC20",
                                 "nodeType": "Identifier",
                                 "overloadedDeclarations": [],
                                 "referencedDeclaration": 255,
-                                "src": "2821:6:7",
+                                "src": "2846:6:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_type$_t_contract$_IERC20_$255_$",
                                   "typeString": "type(contract IERC20)"
                                 }
                               },
-                              "id": 1270,
+                              "id": 1272,
                               "isConstant": false,
                               "isLValue": false,
                               "isPure": false,
@@ -15960,14 +16251,14 @@
                               "lValueRequested": false,
                               "names": [],
                               "nodeType": "FunctionCall",
-                              "src": "2821:16:7",
+                              "src": "2846:16:7",
                               "tryCall": false,
                               "typeDescriptions": {
                                 "typeIdentifier": "t_contract$_IERC20_$255",
                                 "typeString": "contract IERC20"
                               }
                             },
-                            "id": 1271,
+                            "id": 1273,
                             "isConstant": false,
                             "isLValue": false,
                             "isPure": false,
@@ -15975,13 +16266,13 @@
                             "memberName": "allowance",
                             "nodeType": "MemberAccess",
                             "referencedDeclaration": 232,
-                            "src": "2821:26:7",
+                            "src": "2846:26:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$",
                               "typeString": "function (address,address) view external returns (uint256)"
                             }
                           },
-                          "id": 1277,
+                          "id": 1279,
                           "isConstant": false,
                           "isLValue": false,
                           "isPure": false,
@@ -15989,7 +16280,7 @@
                           "lValueRequested": false,
                           "names": [],
                           "nodeType": "FunctionCall",
-                          "src": "2821:48:7",
+                          "src": "2846:48:7",
                           "tryCall": false,
                           "typeDescriptions": {
                             "typeIdentifier": "t_uint256",
@@ -15999,18 +16290,18 @@
                         "nodeType": "BinaryOperation",
                         "operator": ">=",
                         "rightExpression": {
-                          "id": 1278,
+                          "id": 1280,
                           "name": "amount",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
-                          "referencedDeclaration": 1167,
-                          "src": "2873:6:7",
+                          "referencedDeclaration": 1169,
+                          "src": "2898:6:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_uint256",
                             "typeString": "uint256"
                           }
                         },
-                        "src": "2821:58:7",
+                        "src": "2846:58:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bool",
                           "typeString": "bool"
@@ -16018,14 +16309,14 @@
                       },
                       {
                         "hexValue": "4245546f6b656e4d616c6c3a20627579657220646f65736e277420617070726f766520656e6f75676820746f6b656e20746f206275792074686973206974656d",
-                        "id": 1280,
+                        "id": 1282,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": true,
                         "kind": "string",
                         "lValueRequested": false,
                         "nodeType": "Literal",
-                        "src": "2887:66:7",
+                        "src": "2912:66:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_stringliteral_157fc5858d6b0d54de2cbea831cc967ea7927dd4aaad4520576b575909c099a9",
                           "typeString": "literal_string \"BETokenMall: buyer doesn't approve enough token to buy this item\""
@@ -16044,7 +16335,7 @@
                           "typeString": "literal_string \"BETokenMall: buyer doesn't approve enough token to buy this item\""
                         }
                       ],
-                      "id": 1267,
+                      "id": 1269,
                       "name": "require",
                       "nodeType": "Identifier",
                       "overloadedDeclarations": [
@@ -16052,13 +16343,13 @@
                         4294967278
                       ],
                       "referencedDeclaration": 4294967278,
-                      "src": "2806:7:7",
+                      "src": "2831:7:7",
                       "typeDescriptions": {
                         "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$",
                         "typeString": "function (bool,string memory) pure"
                       }
                     },
-                    "id": 1281,
+                    "id": 1283,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -16066,51 +16357,51 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "2806:153:7",
+                    "src": "2831:153:7",
                     "tryCall": false,
                     "typeDescriptions": {
                       "typeIdentifier": "t_tuple$__$",
                       "typeString": "tuple()"
                     }
                   },
-                  "id": 1282,
+                  "id": 1284,
                   "nodeType": "ExpressionStatement",
-                  "src": "2806:153:7"
+                  "src": "2831:153:7"
                 },
                 {
                   "expression": {
                     "arguments": [
                       {
-                        "id": 1287,
+                        "id": 1289,
                         "name": "buyer",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1223,
-                        "src": "3034:5:7",
+                        "referencedDeclaration": 1225,
+                        "src": "3059:5:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_address",
                           "typeString": "address"
                         }
                       },
                       {
-                        "id": 1288,
+                        "id": 1290,
                         "name": "feeToAddress",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1319,
-                        "src": "3041:12:7",
+                        "referencedDeclaration": 1322,
+                        "src": "3066:12:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_address",
                           "typeString": "address"
                         }
                       },
                       {
-                        "id": 1289,
+                        "id": 1291,
                         "name": "amount",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1167,
-                        "src": "3055:6:7",
+                        "referencedDeclaration": 1169,
+                        "src": "3080:6:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
@@ -16135,12 +16426,12 @@
                       "expression": {
                         "arguments": [
                           {
-                            "id": 1284,
+                            "id": 1286,
                             "name": "currency",
                             "nodeType": "Identifier",
                             "overloadedDeclarations": [],
-                            "referencedDeclaration": 1165,
-                            "src": "3007:8:7",
+                            "referencedDeclaration": 1167,
+                            "src": "3032:8:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_address",
                               "typeString": "address"
@@ -16154,18 +16445,18 @@
                               "typeString": "address"
                             }
                           ],
-                          "id": 1283,
+                          "id": 1285,
                           "name": "IERC20",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
                           "referencedDeclaration": 255,
-                          "src": "3000:6:7",
+                          "src": "3025:6:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_type$_t_contract$_IERC20_$255_$",
                             "typeString": "type(contract IERC20)"
                           }
                         },
-                        "id": 1285,
+                        "id": 1287,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": false,
@@ -16173,14 +16464,14 @@
                         "lValueRequested": false,
                         "names": [],
                         "nodeType": "FunctionCall",
-                        "src": "3000:16:7",
+                        "src": "3025:16:7",
                         "tryCall": false,
                         "typeDescriptions": {
                           "typeIdentifier": "t_contract$_IERC20_$255",
                           "typeString": "contract IERC20"
                         }
                       },
-                      "id": 1286,
+                      "id": 1288,
                       "isConstant": false,
                       "isLValue": false,
                       "isPure": false,
@@ -16188,13 +16479,13 @@
                       "memberName": "safeTransferFrom",
                       "nodeType": "MemberAccess",
                       "referencedDeclaration": 351,
-                      "src": "3000:33:7",
+                      "src": "3025:33:7",
                       "typeDescriptions": {
                         "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$255_$_t_address_$_t_address_$_t_uint256_$returns$__$bound_to$_t_contract$_IERC20_$255_$",
                         "typeString": "function (contract IERC20,address,address,uint256)"
                       }
                     },
-                    "id": 1290,
+                    "id": 1292,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -16202,51 +16493,51 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "3000:62:7",
+                    "src": "3025:62:7",
                     "tryCall": false,
                     "typeDescriptions": {
                       "typeIdentifier": "t_tuple$__$",
                       "typeString": "tuple()"
                     }
                   },
-                  "id": 1291,
+                  "id": 1293,
                   "nodeType": "ExpressionStatement",
-                  "src": "3000:62:7"
+                  "src": "3025:62:7"
                 },
                 {
                   "expression": {
                     "arguments": [
                       {
-                        "id": 1296,
+                        "id": 1298,
                         "name": "seller",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
                         "referencedDeclaration": 1052,
-                        "src": "3137:6:7",
+                        "src": "3162:6:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_address",
                           "typeString": "address"
                         }
                       },
                       {
-                        "id": 1297,
+                        "id": 1299,
                         "name": "buyer",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1223,
-                        "src": "3145:5:7",
+                        "referencedDeclaration": 1225,
+                        "src": "3170:5:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_address",
                           "typeString": "address"
                         }
                       },
                       {
-                        "id": 1298,
+                        "id": 1300,
                         "name": "tokenAmount",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1204,
-                        "src": "3152:11:7",
+                        "referencedDeclaration": 1206,
+                        "src": "3177:11:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
@@ -16271,12 +16562,12 @@
                       "expression": {
                         "arguments": [
                           {
-                            "id": 1293,
+                            "id": 1295,
                             "name": "tokenAddress",
                             "nodeType": "Identifier",
                             "overloadedDeclarations": [],
                             "referencedDeclaration": 1050,
-                            "src": "3106:12:7",
+                            "src": "3131:12:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_address",
                               "typeString": "address"
@@ -16290,18 +16581,18 @@
                               "typeString": "address"
                             }
                           ],
-                          "id": 1292,
+                          "id": 1294,
                           "name": "IERC20",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
                           "referencedDeclaration": 255,
-                          "src": "3099:6:7",
+                          "src": "3124:6:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_type$_t_contract$_IERC20_$255_$",
                             "typeString": "type(contract IERC20)"
                           }
                         },
-                        "id": 1294,
+                        "id": 1296,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": false,
@@ -16309,14 +16600,14 @@
                         "lValueRequested": false,
                         "names": [],
                         "nodeType": "FunctionCall",
-                        "src": "3099:20:7",
+                        "src": "3124:20:7",
                         "tryCall": false,
                         "typeDescriptions": {
                           "typeIdentifier": "t_contract$_IERC20_$255",
                           "typeString": "contract IERC20"
                         }
                       },
-                      "id": 1295,
+                      "id": 1297,
                       "isConstant": false,
                       "isLValue": false,
                       "isPure": false,
@@ -16324,13 +16615,13 @@
                       "memberName": "safeTransferFrom",
                       "nodeType": "MemberAccess",
                       "referencedDeclaration": 351,
-                      "src": "3099:37:7",
+                      "src": "3124:37:7",
                       "typeDescriptions": {
                         "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$255_$_t_address_$_t_address_$_t_uint256_$returns$__$bound_to$_t_contract$_IERC20_$255_$",
                         "typeString": "function (contract IERC20,address,address,uint256)"
                       }
                     },
-                    "id": 1299,
+                    "id": 1301,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -16338,51 +16629,27 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "3099:65:7",
+                    "src": "3124:65:7",
                     "tryCall": false,
                     "typeDescriptions": {
                       "typeIdentifier": "t_tuple$__$",
                       "typeString": "tuple()"
                     }
                   },
-                  "id": 1300,
+                  "id": 1302,
                   "nodeType": "ExpressionStatement",
-                  "src": "3099:65:7"
+                  "src": "3124:65:7"
                 },
                 {
                   "eventCall": {
                     "arguments": [
                       {
-                        "id": 1302,
+                        "id": 1304,
                         "name": "buyer",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1223,
-                        "src": "3212:5:7",
-                        "typeDescriptions": {
-                          "typeIdentifier": "t_address",
-                          "typeString": "address"
-                        }
-                      },
-                      {
-                        "id": 1303,
-                        "name": "tokenAddress",
-                        "nodeType": "Identifier",
-                        "overloadedDeclarations": [],
-                        "referencedDeclaration": 1050,
-                        "src": "3219:12:7",
-                        "typeDescriptions": {
-                          "typeIdentifier": "t_address",
-                          "typeString": "address"
-                        }
-                      },
-                      {
-                        "id": 1304,
-                        "name": "currency",
-                        "nodeType": "Identifier",
-                        "overloadedDeclarations": [],
-                        "referencedDeclaration": 1165,
-                        "src": "3233:8:7",
+                        "referencedDeclaration": 1225,
+                        "src": "3237:5:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_address",
                           "typeString": "address"
@@ -16390,11 +16657,47 @@
                       },
                       {
                         "id": 1305,
-                        "name": "amount",
+                        "name": "tokenAddress",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 1050,
+                        "src": "3244:12:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 1306,
+                        "name": "currency",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
                         "referencedDeclaration": 1167,
-                        "src": "3243:6:7",
+                        "src": "3258:8:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 1307,
+                        "name": "amount",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 1169,
+                        "src": "3268:6:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      },
+                      {
+                        "id": 1308,
+                        "name": "tokenAmount",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 1206,
+                        "src": "3276:11:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
@@ -16415,23 +16718,27 @@
                           "typeIdentifier": "t_address",
                           "typeString": "address"
                         },
+                        {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        },
                         {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
                         }
                       ],
-                      "id": 1301,
+                      "id": 1303,
                       "name": "BuyTransaction",
                       "nodeType": "Identifier",
                       "overloadedDeclarations": [],
-                      "referencedDeclaration": 1066,
-                      "src": "3197:14:7",
+                      "referencedDeclaration": 1068,
+                      "src": "3222:14:7",
                       "typeDescriptions": {
-                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_address_$_t_uint256_$returns$__$",
-                        "typeString": "function (address,address,address,uint256)"
+                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_address_$_t_uint256_$_t_uint256_$returns$__$",
+                        "typeString": "function (address,address,address,uint256,uint256)"
                       }
                     },
-                    "id": 1306,
+                    "id": 1309,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -16439,60 +16746,60 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "3197:53:7",
+                    "src": "3222:66:7",
                     "tryCall": false,
                     "typeDescriptions": {
                       "typeIdentifier": "t_tuple$__$",
                       "typeString": "tuple()"
                     }
                   },
-                  "id": 1307,
+                  "id": 1310,
                   "nodeType": "EmitStatement",
-                  "src": "3192:58:7"
+                  "src": "3217:71:7"
                 }
               ]
             },
             "documentation": {
-              "id": 1163,
+              "id": 1165,
               "nodeType": "StructuredDocumentation",
-              "src": "1744:29:7",
+              "src": "1769:29:7",
               "text": " @dev Buy token"
             },
             "functionSelector": "68f8fc10",
-            "id": 1309,
+            "id": 1312,
             "implemented": true,
             "kind": "function",
             "modifiers": [
               {
-                "id": 1170,
+                "id": 1172,
                 "kind": "modifierInvocation",
                 "modifierName": {
-                  "id": 1169,
+                  "id": 1171,
                   "name": "nonReentrant",
                   "nodeType": "IdentifierPath",
                   "referencedDeclaration": 142,
-                  "src": "1837:12:7"
+                  "src": "1862:12:7"
                 },
                 "nodeType": "ModifierInvocation",
-                "src": "1837:12:7"
+                "src": "1862:12:7"
               }
             ],
             "name": "buyToken",
-            "nameLocation": "1785:8:7",
+            "nameLocation": "1810:8:7",
             "nodeType": "FunctionDefinition",
             "parameters": {
-              "id": 1168,
+              "id": 1170,
               "nodeType": "ParameterList",
               "parameters": [
                 {
                   "constant": false,
-                  "id": 1165,
+                  "id": 1167,
                   "mutability": "mutable",
                   "name": "currency",
-                  "nameLocation": "1802:8:7",
+                  "nameLocation": "1827:8:7",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1309,
-                  "src": "1794:16:7",
+                  "scope": 1312,
+                  "src": "1819:16:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
@@ -16500,10 +16807,10 @@
                     "typeString": "address"
                   },
                   "typeName": {
-                    "id": 1164,
+                    "id": 1166,
                     "name": "address",
                     "nodeType": "ElementaryTypeName",
-                    "src": "1794:7:7",
+                    "src": "1819:7:7",
                     "stateMutability": "nonpayable",
                     "typeDescriptions": {
                       "typeIdentifier": "t_address",
@@ -16514,13 +16821,13 @@
                 },
                 {
                   "constant": false,
-                  "id": 1167,
+                  "id": 1169,
                   "mutability": "mutable",
                   "name": "amount",
-                  "nameLocation": "1820:6:7",
+                  "nameLocation": "1845:6:7",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1309,
-                  "src": "1812:14:7",
+                  "scope": 1312,
+                  "src": "1837:14:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
@@ -16528,10 +16835,10 @@
                     "typeString": "uint256"
                   },
                   "typeName": {
-                    "id": 1166,
+                    "id": 1168,
                     "name": "uint256",
                     "nodeType": "ElementaryTypeName",
-                    "src": "1812:7:7",
+                    "src": "1837:7:7",
                     "typeDescriptions": {
                       "typeIdentifier": "t_uint256",
                       "typeString": "uint256"
@@ -16540,27 +16847,27 @@
                   "visibility": "internal"
                 }
               ],
-              "src": "1793:34:7"
+              "src": "1818:34:7"
             },
             "returnParameters": {
-              "id": 1171,
+              "id": 1173,
               "nodeType": "ParameterList",
               "parameters": [],
-              "src": "1850:0:7"
+              "src": "1875:0:7"
             },
-            "scope": 1310,
-            "src": "1776:1479:7",
+            "scope": 1313,
+            "src": "1801:1492:7",
             "stateMutability": "nonpayable",
             "virtual": false,
             "visibility": "external"
           }
         ],
-        "scope": 1311,
-        "src": "387:2870:7",
+        "scope": 1314,
+        "src": "387:2908:7",
         "usedErrors": []
       }
     ],
-    "src": "32:3226:7"
+    "src": "32:3264:7"
   },
   "compiler": {
     "name": "solc",
@@ -16568,7 +16875,7 @@
   },
   "networks": {},
   "schemaVersion": "3.4.11",
-  "updatedAt": "2023-07-27T08:09:28.495Z",
+  "updatedAt": "2023-07-27T08:36:07.464Z",
   "devdoc": {
     "kind": "dev",
     "methods": {
diff --git a/contracts/market/BETokenMall.sol b/contracts/market/BETokenMall.sol
index 691f3da..1e31c5c 100644
--- a/contracts/market/BETokenMall.sol
+++ b/contracts/market/BETokenMall.sol
@@ -25,7 +25,8 @@ contract BETokenMall is MallBase, ReentrancyGuard {
     address indexed buyer,
     address tokenAddress,
     address currency,
-    uint256 amount
+    uint256 amount,
+    uint256 tokenAmount
   );
   event TokenAddressUpdated(address tokenAddress);
   event SellerUpdated(address seller);
@@ -103,6 +104,6 @@ contract BETokenMall is MallBase, ReentrancyGuard {
     // Transfer token to buyer
     IERC20(tokenAddress).safeTransferFrom(seller, buyer, tokenAmount);
     // emit buy event
-    emit BuyTransaction(buyer, tokenAddress, currency, amount);
+    emit BuyTransaction(buyer, tokenAddress, currency, amount, tokenAmount);
   }
 }