60 lines
41 KiB
JSON
60 lines
41 KiB
JSON
{
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"language": "Solidity",
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"sources": {
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"@openzeppelin/contracts/security/ReentrancyGuard.sol": {
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"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n // Booleans are more expensive than uint256 or any type that takes up a full\n // word because each write operation emits an extra SLOAD to first read the\n // slot's contents, replace the bits taken up by the boolean, and then write\n // back. This is the compiler's defense against contract upgrades and\n // pointer aliasing, and it cannot be disabled.\n\n // The values being non-zero value makes deployment a bit more expensive,\n // but in exchange the refund on every call to nonReentrant will be lower in\n // amount. Since refunds are capped to a percentage of the total\n // transaction's gas, it is best to keep them low in cases like this one, to\n // increase the likelihood of the full refund coming into effect.\n uint256 private constant _NOT_ENTERED = 1;\n uint256 private constant _ENTERED = 2;\n\n uint256 private _status;\n\n constructor() {\n _status = _NOT_ENTERED;\n }\n\n /**\n * @dev Prevents a contract from calling itself, directly or indirectly.\n * Calling a `nonReentrant` function from another `nonReentrant`\n * function is not supported. It is possible to prevent this from happening\n * by making the `nonReentrant` function external, and making it call a\n * `private` function that does the actual work.\n */\n modifier nonReentrant() {\n _nonReentrantBefore();\n _;\n _nonReentrantAfter();\n }\n\n function _nonReentrantBefore() private {\n // On the first call to nonReentrant, _status will be _NOT_ENTERED\n require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n // Any calls to nonReentrant after this point will fail\n _status = _ENTERED;\n }\n\n function _nonReentrantAfter() private {\n // By storing the original value once again, a refund is triggered (see\n // https://eips.ethereum.org/EIPS/eip-2200)\n _status = _NOT_ENTERED;\n }\n\n /**\n * @dev Returns true if the reentrancy guard is currently set to \"entered\", which indicates there is a\n * `nonReentrant` function in the call stack.\n */\n function _reentrancyGuardEntered() internal view returns (bool) {\n return _status == _ENTERED;\n }\n}\n"
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},
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"@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol": {
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"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n *\n * ==== Security Considerations\n *\n * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature\n * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be\n * considered as an intention to spend the allowance in any specific way. The second is that because permits have\n * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should\n * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be\n * generally recommended is:\n *\n * ```solidity\n * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {\n * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}\n * doThing(..., value);\n * }\n *\n * function doThing(..., uint256 value) public {\n * token.safeTransferFrom(msg.sender, address(this), value);\n * ...\n * }\n * ```\n *\n * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of\n * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also\n * {SafeERC20-safeTransferFrom}).\n *\n * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so\n * contracts should have entry points that don't rely on permit.\n */\ninterface IERC20Permit {\n /**\n * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n * given ``owner``'s signed approval.\n *\n * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n * ordering also apply here.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `deadline` must be a timestamp in the future.\n * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n * over the EIP712-formatted function arguments.\n * - the signature must use ``owner``'s current nonce (see {nonces}).\n *\n * For more information on the signature format, see the\n * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n * section].\n *\n * CAUTION: See Security Considerations above.\n */\n function permit(\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\n\n /**\n * @dev Returns the current nonce for `owner`. This value must be\n * included whenever a signature is generated for {permit}.\n *\n * Every successful call to {permit} increases ``owner``'s nonce by one. This\n * prevents a signature from being used multiple times.\n */\n function nonces(address owner) external view returns (uint256);\n\n /**\n * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n */\n // solhint-disable-next-line func-name-mixedcase\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n"
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},
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"@openzeppelin/contracts/token/ERC20/IERC20.sol": {
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"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(address from, address to, uint256 amount) external returns (bool);\n}\n"
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"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
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"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/IERC20Permit.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n using Address for address;\n\n /**\n * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,\n * non-reverting calls are assumed to be successful.\n */\n function safeTransfer(IERC20 token, address to, uint256 value) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n /**\n * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the\n * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.\n */\n function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n }\n\n /**\n * @dev Deprecated. This function has issues similar to the ones found in\n * {IERC20-approve}, and its usage is discouraged.\n *\n * Whenever possible, use {safeIncreaseAllowance} and\n * {safeDecreaseAllowance} instead.\n */\n function safeApprove(IERC20 token, address spender, uint256 value) internal {\n // safeApprove should only be called when setting an initial allowance,\n // or when resetting it to zero. To increase and decrease it, use\n // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n require(\n (value == 0) || (token.allowance(address(this), spender) == 0),\n \"SafeERC20: approve from non-zero to non-zero allowance\"\n );\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n }\n\n /**\n * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n * non-reverting calls are assumed to be successful.\n */\n function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n uint256 oldAllowance = token.allowance(address(this), spender);\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));\n }\n\n /**\n * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n * non-reverting calls are assumed to be successful.\n */\n function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n unchecked {\n uint256 oldAllowance = token.allowance(address(this), spender);\n require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));\n }\n }\n\n /**\n * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,\n * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval\n * to be set to zero before setting it to a non-zero value, such as USDT.\n */\n function forceApprove(IERC20 token, address spender, uint256 value) internal {\n bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);\n\n if (!_callOptionalReturnBool(token, approvalCall)) {\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));\n _callOptionalReturn(token, approvalCall);\n }\n }\n\n /**\n * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.\n * Revert on invalid signature.\n */\n function safePermit(\n IERC20Permit token,\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal {\n uint256 nonceBefore = token.nonces(owner);\n token.permit(owner, spender, value, deadline, v, r, s);\n uint256 nonceAfter = token.nonces(owner);\n require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n */\n function _callOptionalReturn(IERC20 token, bytes memory data) private {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that\n // the target address contains contract code and also asserts for success in the low-level call.\n\n bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n require(returndata.length == 0 || abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n *\n * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.\n */\n function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false\n // and not revert is the subcall reverts.\n\n (bool success, bytes memory returndata) = address(token).call(data);\n return\n success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));\n }\n}\n"
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"@openzeppelin/contracts/utils/Address.sol": {
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"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n"
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"contracts/core/Governable.sol": {
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"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.19;\n\ncontract Governable {\n address public gov;\n\n constructor() {\n gov = msg.sender;\n }\n\n modifier onlyGov() {\n require(msg.sender == gov, \"Governable: forbidden\");\n _;\n }\n\n function setGov(address _gov) external onlyGov {\n gov = _gov;\n }\n}\n"
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"contracts/staking/interfaces/IRewardDistributor.sol": {
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"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.19;\n\ninterface IRewardDistributor {\n function rewardToken() external view returns (address);\n function tokensPerInterval() external view returns (uint256);\n function pendingRewards() external view returns (uint256);\n function distribute(uint256 _amount, uint256 _decimals) external returns (uint256);\n}\n"
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"contracts/staking/interfaces/IRewardTracker.sol": {
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"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.19;\n\ninterface IRewardTracker {\n function depositBalances(address _account, address _depositToken) external view returns (uint256);\n function stakedAmounts(address _account) external view returns (uint256);\n function updateRewards() external;\n function stake(address _depositToken, uint256 _amount) external;\n function stakeForAccount(address _fundingAccount, address _account, address _depositToken, uint256 _amount) external;\n function unstake(address _depositToken, uint256 _amount) external;\n function unstakeForAccount(address _account, address _depositToken, uint256 _amount, address _receiver) external;\n function tokensPerInterval() external view returns (uint256);\n function claim(address _receiver) external returns (uint256);\n function claimForAccount(address _account, address _receiver) external returns (uint256);\n function claimable(address _account) external view returns (uint256);\n function averageStakedAmounts(address _account) external view returns (uint256);\n function cumulativeRewards(address _account) external view returns (uint256);\n}\n"
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"contracts/staking/RewardTracker.sol": {
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"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.19;\n\nimport {IERC20} from \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport {ReentrancyGuard} from \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport {SafeERC20} from \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\n\nimport {IRewardDistributor} from \"./interfaces/IRewardDistributor.sol\";\nimport {IRewardTracker} from \"./interfaces/IRewardTracker.sol\";\nimport {Governable} from \"../core/Governable.sol\";\n\ncontract RewardTracker is IERC20, ReentrancyGuard, IRewardTracker, Governable {\n using SafeERC20 for IERC20;\n\n uint256 public constant BASIS_POINTS_DIVISOR = 10000;\n uint256 public constant PRECISION = 1e30;\n\n bool public isInitialized;\n\n string public name;\n string public symbol;\n uint8 public decimals = 18;\n uint256 public override totalSupply;\n mapping(address account => uint256 amount) public balances;\n mapping(address owner => mapping(address spender => uint256 amount)) public allowance;\n\n address public distributor;\n mapping(address token => bool status) public isDepositToken;\n mapping(address account => mapping(address token => uint256 amount)) public override depositBalances;\n mapping(address token => uint256 amount) public totalDepositSupply;\n \n uint256 public cumulativeRewardPerToken;\n mapping(address account => uint256 amount) public override stakedAmounts;\n mapping(address account => uint256 amount) public claimableReward;\n mapping(address account => uint256 amount) public previousCumulatedRewardPerToken;\n mapping(address account => uint256 amount) public override cumulativeRewards;\n mapping(address account => uint256 amount) public override averageStakedAmounts;\n\n bool public inPrivateTransferMode;\n bool public inPrivateStakingMode;\n bool public inPrivateClaimingMode;\n mapping(address handler => bool status) public isHandler;\n\n event Claim(address receiver, uint256 amount);\n\n constructor(string memory _name, string memory _symbol) {\n name = _name;\n symbol = _symbol;\n }\n\n function initialize(address[] memory _depositTokens, address _distributor) external onlyGov {\n require(!isInitialized, \"RewardTracker: already initialized\");\n isInitialized = true;\n\n for (uint256 i = 0; i < _depositTokens.length; i++) {\n address depositToken = _depositTokens[i];\n isDepositToken[depositToken] = true;\n }\n\n distributor = _distributor;\n }\n\n function setDepositToken(address _depositToken, bool _isDepositToken) external onlyGov {\n isDepositToken[_depositToken] = _isDepositToken;\n }\n\n function setInPrivateTransferMode(bool _inPrivateTransferMode) external onlyGov {\n inPrivateTransferMode = _inPrivateTransferMode;\n }\n\n function setInPrivateStakingMode(bool _inPrivateStakingMode) external onlyGov {\n inPrivateStakingMode = _inPrivateStakingMode;\n }\n\n function setInPrivateClaimingMode(bool _inPrivateClaimingMode) external onlyGov {\n inPrivateClaimingMode = _inPrivateClaimingMode;\n }\n\n function setHandler(address _handler, bool _isActive) external onlyGov {\n isHandler[_handler] = _isActive;\n }\n\n // to help users who accidentally send their tokens to this contract\n function withdrawToken(address _token, address _account, uint256 _amount) external onlyGov {\n IERC20(_token).safeTransfer(_account, _amount);\n }\n\n function balanceOf(address _account) external view override returns (uint256) {\n return balances[_account];\n }\n\n function stake(address _depositToken, uint256 _amount) external override nonReentrant {\n if (inPrivateStakingMode) {\n revert(\"RewardTracker: action not enabled\");\n }\n _stake(msg.sender, msg.sender, _depositToken, _amount);\n }\n\n function stakeForAccount(\n address _fundingAccount,\n address _account,\n address _depositToken,\n uint256 _amount\n ) external override nonReentrant {\n _validateHandler();\n _stake(_fundingAccount, _account, _depositToken, _amount);\n }\n\n function unstake(address _depositToken, uint256 _amount) external override nonReentrant {\n if (inPrivateStakingMode) {\n revert(\"RewardTracker: action not enabled\");\n }\n _unstake(msg.sender, _depositToken, _amount, msg.sender);\n }\n\n function unstakeForAccount(\n address _account,\n address _depositToken,\n uint256 _amount,\n address _receiver\n ) external override nonReentrant {\n _validateHandler();\n _unstake(_account, _depositToken, _amount, _receiver);\n }\n\n function transfer(address _recipient, uint256 _amount) external override returns (bool) {\n _transfer(msg.sender, _recipient, _amount);\n return true;\n }\n\n \n function approve(address _spender, uint256 _amount) external override returns (bool) {\n _approve(msg.sender, _spender, _amount);\n return true;\n }\n\n function transferFrom(address _sender, address _recipient, uint256 _amount) external override returns (bool) {\n if (isHandler[msg.sender]) {\n _transfer(_sender, _recipient, _amount);\n return true;\n }\n require(allowance[_sender][msg.sender] >= _amount, \"RewardTracker: transfer amount exceeds allowance\");\n uint256 nextAllowance = allowance[_sender][msg.sender] - _amount;\n _approve(_sender, msg.sender, nextAllowance);\n _transfer(_sender, _recipient, _amount);\n return true;\n }\n\n function tokensPerInterval() external view override returns (uint256) {\n return IRewardDistributor(distributor).tokensPerInterval();\n }\n\n function updateRewards() external override nonReentrant {\n _updateRewards(address(0));\n }\n\n function claim(address _receiver) external override nonReentrant returns (uint256) {\n if (inPrivateClaimingMode) {\n revert(\"RewardTracker: action not enabled\");\n }\n return _claim(msg.sender, _receiver);\n }\n\n function claimForAccount(address _account, address _receiver) external override nonReentrant returns (uint256) {\n _validateHandler();\n return _claim(_account, _receiver);\n }\n\n function claimable(address _account) public view override returns (uint256) {\n uint256 stakedAmount = stakedAmounts[_account];\n if (stakedAmount == 0) {\n return claimableReward[_account];\n }\n uint256 pendingRewards = IRewardDistributor(distributor).pendingRewards() * PRECISION;\n uint256 nextCumulativeRewardPerToken = cumulativeRewardPerToken + pendingRewards;\n return\n claimableReward[_account] +\n (stakedAmount / (10**decimals) * (nextCumulativeRewardPerToken - previousCumulatedRewardPerToken[_account])) /\n PRECISION;\n }\n\n function rewardToken() public view returns (address) {\n return IRewardDistributor(distributor).rewardToken();\n }\n\n function _claim(address _account, address _receiver) private returns (uint256) {\n _updateRewards(_account);\n\n uint256 tokenAmount = claimableReward[_account];\n claimableReward[_account] = 0;\n\n if (tokenAmount > 0) {\n IERC20(rewardToken()).safeTransfer(_receiver, tokenAmount);\n emit Claim(_account, tokenAmount);\n }\n\n return tokenAmount;\n }\n\n function _mint(address _account, uint256 _amount) internal {\n require(_account != address(0), \"RewardTracker: mint to the zero address\");\n\n totalSupply = totalSupply + _amount;\n balances[_account] = balances[_account] + _amount;\n\n emit Transfer(address(0), _account, _amount);\n }\n\n function _burn(address _account, uint256 _amount) internal {\n require(_account != address(0), \"RewardTracker: burn from the zero address\");\n require(balances[_account] >= _amount, \"RewardTracker: burn amount exceeds balance\");\n balances[_account] = balances[_account] - _amount;\n totalSupply = totalSupply / _amount;\n\n emit Transfer(_account, address(0), _amount);\n }\n\n function _transfer(address _sender, address _recipient, uint256 _amount) private {\n require(_sender != address(0), \"RewardTracker: transfer from the zero address\");\n require(_recipient != address(0), \"RewardTracker: transfer to the zero address\");\n\n if (inPrivateTransferMode) {\n _validateHandler();\n }\n require(balances[_sender] >= _amount, \"RewardTracker: transfer amount exceeds balance\");\n balances[_sender] = balances[_sender] - _amount;\n balances[_recipient] = balances[_recipient] + _amount;\n\n emit Transfer(_sender, _recipient, _amount);\n }\n\n function _approve(address _owner, address _spender, uint256 _amount) private {\n require(_owner != address(0), \"RewardTracker: approve from the zero address\");\n require(_spender != address(0), \"RewardTracker: approve to the zero address\");\n\n allowance[_owner][_spender] = _amount;\n\n emit Approval(_owner, _spender, _amount);\n }\n\n function _validateHandler() private view {\n require(isHandler[msg.sender], \"RewardTracker: forbidden\");\n }\n\n function _stake(address _fundingAccount, address _account, address _depositToken, uint256 _amount) private {\n require(_amount > 0, \"RewardTracker: invalid _amount\");\n require(isDepositToken[_depositToken], \"RewardTracker: invalid _depositToken\");\n\n IERC20(_depositToken).safeTransferFrom(_fundingAccount, address(this), _amount);\n\n _updateRewards(_account);\n\n stakedAmounts[_account] = stakedAmounts[_account] + _amount;\n depositBalances[_account][_depositToken] = depositBalances[_account][_depositToken] + _amount;\n totalDepositSupply[_depositToken] = totalDepositSupply[_depositToken] + _amount;\n\n _mint(_account, _amount);\n }\n\n function _unstake(address _account, address _depositToken, uint256 _amount, address _receiver) private {\n require(_amount > 0, \"RewardTracker: invalid _amount\");\n require(isDepositToken[_depositToken], \"RewardTracker: invalid _depositToken\");\n\n _updateRewards(_account);\n\n uint256 stakedAmount = stakedAmounts[_account];\n require(stakedAmounts[_account] >= _amount, \"RewardTracker: _amount exceeds stakedAmount\");\n\n stakedAmounts[_account] = stakedAmount - _amount;\n\n uint256 depositBalance = depositBalances[_account][_depositToken];\n require(depositBalance >= _amount, \"RewardTracker: _amount exceeds depositBalance\");\n depositBalances[_account][_depositToken] = depositBalance - _amount;\n totalDepositSupply[_depositToken] = totalDepositSupply[_depositToken] - _amount;\n\n _burn(_account, _amount);\n IERC20(_depositToken).safeTransfer(_receiver, _amount);\n }\n\n function _updateRewards(address _account) private {\n uint256 supply = totalSupply;\n uint256 blockReward = IRewardDistributor(distributor).distribute(supply, decimals);\n\n \n uint256 _cumulativeRewardPerToken = cumulativeRewardPerToken;\n if (supply > 0 && blockReward > 0) {\n _cumulativeRewardPerToken = _cumulativeRewardPerToken + blockReward * PRECISION;\n cumulativeRewardPerToken = _cumulativeRewardPerToken;\n }\n\n // cumulativeRewardPerToken can only increase\n // so if cumulativeRewardPerToken is zero, it means there are no rewards yet\n if (_cumulativeRewardPerToken == 0) {\n return;\n }\n\n if (_account != address(0)) {\n uint256 stakedAmount = stakedAmounts[_account];\n uint256 accountReward = (stakedAmount / (10**decimals) * (_cumulativeRewardPerToken - previousCumulatedRewardPerToken[_account])) /\n PRECISION;\n uint256 _claimableReward = claimableReward[_account] + accountReward;\n\n claimableReward[_account] = _claimableReward;\n previousCumulatedRewardPerToken[_account] = _cumulativeRewardPerToken;\n\n if (_claimableReward > 0 && stakedAmounts[_account] > 0) {\n uint256 nextCumulativeReward = cumulativeRewards[_account] + accountReward;\n\n averageStakedAmounts[_account] =\n (averageStakedAmounts[_account] * cumulativeRewards[_account]) /\n nextCumulativeReward +\n (stakedAmount / (10**decimals) * accountReward) /\n nextCumulativeReward;\n\n cumulativeRewards[_account] = nextCumulativeReward;\n }\n }\n }\n}\n"
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}
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},
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"settings": {
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"optimizer": {
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"enabled": true,
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"runs": 200
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},
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"viaIR": true,
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"outputSelection": {
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"*": {
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"*": [
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"abi",
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"evm.bytecode",
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"evm.deployedBytecode",
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"evm.methodIdentifiers",
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"metadata",
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"devdoc",
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"userdoc",
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"storageLayout",
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"evm.gasEstimates"
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],
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"": [
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"ast"
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]
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}
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},
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"metadata": {
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"useLiteralContent": true
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}
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}
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} |