diff --git a/src/index.ts b/src/index.ts
index 685c303..2fcd2e4 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -21,7 +21,6 @@ import { WALLET_STORAGE_KEY_NAME } from "./config/constants";
 import { DEFALUT_TOKENS } from "./config/chain_config";
 import {
   loadInternalWallet,
-  newMnemonic,
   restoreWalletByMnemonic,
 } from "./manage/WalletManage";
 import { buildLoginSignMsg, signLogin } from "./util/sign.util";
@@ -32,6 +31,7 @@ import { getJCErc721Info, getTypeByAddress, UNKNOW } from "./util/chain.util";
 import { JCStandard } from "./standards/JCStandard";
 import { NativeSvr } from "./services/NativeSvr";
 import { ChainCommon } from "./standards/ChainCommon";
+import { fromTokenMinimalUnit } from "./util/number.util";
 
 var global =
   (typeof globalThis !== "undefined" && globalThis) ||
@@ -393,7 +393,14 @@ export default class JCWallet {
     return address;
   }
 
-  public async sendEth(to: string, amount: number | string) {
+  public async generateGasShow(gas: any) {
+    let price = await this.web3.eth.getGasPrice();
+    let ehtBN = this.web3.utils.toBN(price).mul(this.web3.utils.toBN(gas));
+    let eth = fromTokenMinimalUnit(ehtBN, 18);
+    return { gas, price, eth };
+  }
+
+  public async sendEth(to: string, amount: number | string, estimate: number) {
     let from = this.currentAccAddr;
     const amountToSend = this.web3.utils.toWei(amount + "", "ether");
     let gas = await this.web3.eth.estimateGas({
@@ -401,7 +408,15 @@ export default class JCWallet {
       to,
       value: amountToSend,
     });
-    this.web3.eth.sendTransaction({ from, to, gas, value: amountToSend });
+    if (estimate) {
+      return this.generateGasShow(gas);
+    }
+    return this.web3.eth.sendTransaction({
+      from,
+      to,
+      gas,
+      value: amountToSend,
+    });
   }
 
   public async getBalance(account?: string) {
@@ -470,13 +485,19 @@ export default class JCWallet {
     return result;
   }
 
-  public async sendErc20(address: string, to: string, amount: string) {
+  public async sendErc20(
+    address: string,
+    to: string,
+    amount: string,
+    estimate: number
+  ) {
     let from = this.currentAccAddr;
     let result = await this.erc20Standard.transfer({
       address,
       from,
       to,
       amount,
+      estimate,
     });
     return result;
   }
@@ -544,15 +565,20 @@ export default class JCWallet {
     return nfts;
   }
 
-  public async sendNFT(address: string, to: string, tokenId: string) {
+  public async sendNFT(
+    address: string,
+    to: string,
+    tokenId: string,
+    estimate: number
+  ) {
     let from = this.currentAccAddr;
-    let result = await this.erc721Standard.transfer({
+    return this.erc721Standard.transfer({
       address,
       from,
       to,
       tokenId,
+      estimate,
     });
-    return result;
   }
 
   public async erc1155Info(address: string) {}
@@ -562,8 +588,24 @@ export default class JCWallet {
       account = this.currentAccAddr;
     }
   }
-  //TODO::
-  public async sendErc1155() {}
+
+  public async sendErc1155(
+    address: string,
+    to: string,
+    tokenIds: string[],
+    amounts: string[],
+    estimate: number
+  ) {
+    let from = this.currentAccAddr;
+    return this.erc1155Standard.transferBatch({
+      address,
+      from,
+      to,
+      tokenIds,
+      amounts,
+      estimate,
+    });
+  }
 }
 
 // window.jc = window.jc || {wallet: new JCWallet()};
diff --git a/src/standards/ChainCommon.ts b/src/standards/ChainCommon.ts
index 417b7fd..69a3610 100644
--- a/src/standards/ChainCommon.ts
+++ b/src/standards/ChainCommon.ts
@@ -1,6 +1,8 @@
 import Web3 from "web3";
 import { BN } from "ethereumjs-util";
 
+export const SAMPLE_GAS = 1000000;
+
 export class ChainCommon {
   private web3: Web3;
 
diff --git a/src/standards/ERC1155Standard.ts b/src/standards/ERC1155Standard.ts
index 42f437c..5ce5f59 100644
--- a/src/standards/ERC1155Standard.ts
+++ b/src/standards/ERC1155Standard.ts
@@ -1,14 +1,12 @@
+import Web3 from "web3";
+import { abiERC1155 } from "../abis/abiERC1155";
+import { timeoutFetch } from "../util/net.util";
+import { getFormattedIpfsUrl } from "../util/wallet.util";
 
-import Web3 from 'web3';
-import { abiERC1155 } from '../abis/abiERC1155';
-import { timeoutFetch } from '../util/net.util';
-import { getFormattedIpfsUrl } from '../util/wallet.util';
-
-export const ERC1155 = 'ERC1155';
-export const ERC1155_INTERFACE_ID = '0xd9b67a26';
-export const ERC1155_METADATA_URI_INTERFACE_ID = '0x0e89341c';
-export const ERC1155_TOKEN_RECEIVER_INTERFACE_ID = '0x4e2312e0';
-
+export const ERC1155 = "ERC1155";
+export const ERC1155_INTERFACE_ID = "0xd9b67a26";
+export const ERC1155_METADATA_URI_INTERFACE_ID = "0x0e89341c";
+export const ERC1155_TOKEN_RECEIVER_INTERFACE_ID = "0x4e2312e0";
 
 export class ERC1155Standard {
   private web3: Web3;
@@ -24,11 +22,11 @@ export class ERC1155Standard {
    * @returns Promise resolving to whether the contract implements ERC1155 URI Metadata interface.
    */
   contractSupportsURIMetadataInterface = async (
-    address: string,
+    address: string
   ): Promise<boolean> => {
     return this.contractSupportsInterface(
       address,
-      ERC1155_METADATA_URI_INTERFACE_ID,
+      ERC1155_METADATA_URI_INTERFACE_ID
     );
   };
 
@@ -39,11 +37,11 @@ export class ERC1155Standard {
    * @returns Promise resolving to whether the contract implements ERC1155 Token Receiver interface.
    */
   contractSupportsTokenReceiverInterface = async (
-    address: string,
+    address: string
   ): Promise<boolean> => {
     return this.contractSupportsInterface(
       address,
-      ERC1155_TOKEN_RECEIVER_INTERFACE_ID,
+      ERC1155_TOKEN_RECEIVER_INTERFACE_ID
     );
   };
 
@@ -54,7 +52,7 @@ export class ERC1155Standard {
    * @returns Promise resolving to whether the contract implements the base ERC1155 interface.
    */
   contractSupportsBase1155Interface = async (
-    address: string,
+    address: string
   ): Promise<boolean> => {
     return this.contractSupportsInterface(address, ERC1155_INTERFACE_ID);
   };
@@ -69,14 +67,16 @@ export class ERC1155Standard {
   getTokenURI = async (address: string, tokenId: string): Promise<string> => {
     const contract = new this.web3.eth.Contract(abiERC1155, address);
     return new Promise<string>((resolve, reject) => {
-      contract.methods.tokenURI(tokenId).call( (error: Error, result: string) => {
-        /* istanbul ignore if */
-        if (error) {
-          reject(error);
-          return;
-        }
-        resolve(result);
-      });
+      contract.methods
+        .tokenURI(tokenId)
+        .call((error: Error, result: string) => {
+          /* istanbul ignore if */
+          if (error) {
+            reject(error);
+            return;
+          }
+          resolve(result);
+        });
     });
   };
 
@@ -91,18 +91,22 @@ export class ERC1155Standard {
   getBalanceOf = async (
     contractAddress: string,
     address: string,
-    tokenId: string,
+    tokenId: string
   ): Promise<number> => {
     const contract = new this.web3.eth.Contract(abiERC1155, address);
     return new Promise<number>((resolve, reject) => {
-      contract.methods.balanceOf(address, tokenId, (error: Error, result: number) => {
-        /* istanbul ignore if */
-        if (error) {
-          reject(error);
-          return;
+      contract.methods.balanceOf(
+        address,
+        tokenId,
+        (error: Error, result: number) => {
+          /* istanbul ignore if */
+          if (error) {
+            reject(error);
+            return;
+          }
+          resolve(result);
         }
-        resolve(result);
-      });
+      );
     });
   };
 
@@ -123,7 +127,7 @@ export class ERC1155Standard {
     from: string,
     to: string,
     id: string,
-    value: string,
+    value: string
   ): Promise<void> => {
     const contract = new this.web3.eth.Contract(abiERC1155, operator);
     return new Promise<void>((resolve, reject) => {
@@ -140,7 +144,7 @@ export class ERC1155Standard {
             return;
           }
           resolve(result);
-        },
+        }
       );
     });
   };
@@ -154,7 +158,7 @@ export class ERC1155Standard {
    */
   private contractSupportsInterface = async (
     address: string,
-    interfaceId: string,
+    interfaceId: string
   ): Promise<boolean> => {
     const contract = new this.web3.eth.Contract(abiERC1155, address);
     return new Promise<boolean>((resolve, reject) => {
@@ -167,7 +171,7 @@ export class ERC1155Standard {
             return;
           }
           resolve(result);
-        },
+        }
       );
     });
   };
@@ -183,7 +187,7 @@ export class ERC1155Standard {
   getDetails = async (
     address: string,
     ipfsGateway: string,
-    tokenId?: string,
+    tokenId?: string
   ): Promise<{
     standard: string;
     tokenURI: string | undefined;
@@ -198,7 +202,7 @@ export class ERC1155Standard {
 
     if (tokenId) {
       tokenURI = await this.getTokenURI(address, tokenId);
-      if (tokenURI.startsWith('ipfs://')) {
+      if (tokenURI.startsWith("ipfs://")) {
         tokenURI = getFormattedIpfsUrl(ipfsGateway, tokenURI, true);
       }
 
@@ -206,7 +210,7 @@ export class ERC1155Standard {
         const response = await timeoutFetch(tokenURI);
         const object = await response.json();
         image = object?.image;
-        if (image?.startsWith('ipfs://')) {
+        if (image?.startsWith("ipfs://")) {
           image = getFormattedIpfsUrl(ipfsGateway, image, true);
         }
       } catch {
@@ -221,4 +225,39 @@ export class ERC1155Standard {
       image,
     };
   };
+
+  async transferBatch({
+    address,
+    from,
+    to,
+    tokenIds,
+    amounts,
+    gas,
+    estimate,
+  }: {
+    address: string;
+    from: string;
+    to: string;
+    tokenIds: string[];
+    amounts: string[];
+    gas?: number;
+    estimate: number;
+  }) {
+    const contract = new this.web3.eth.Contract(abiERC1155, address);
+    if (!gas) {
+      gas = await contract.methods
+        .safeBatchTransferFrom(from, to, tokenIds, amounts)
+        .estimateGas({ gas: 1000000 });
+    }
+    gas = gas * 1.1;
+    if (estimate) {
+      return jc.wallet.generateGasShow(gas);
+    }
+    return contract.methods
+      .safeBatchTransferFrom(from, to, tokenIds, amounts)
+      .send({
+        from,
+        gas,
+      });
+  }
 }
diff --git a/src/standards/ERC20Standard.ts b/src/standards/ERC20Standard.ts
index 1e69b74..a0395ec 100644
--- a/src/standards/ERC20Standard.ts
+++ b/src/standards/ERC20Standard.ts
@@ -146,18 +146,29 @@ export class ERC20Standard {
     to,
     amount,
     gas,
+    estimate,
   }: {
     address: string;
     from: string;
     to: string;
     amount: number | string;
     gas?: number;
+    estimate: number;
   }) {
     const contract = new this.web3.eth.Contract(abiERC20, address);
     const amountBN = Web3.utils.toBN(Web3.utils.toWei(amount + ""));
+    if (!gas) {
+      gas = await contract.methods
+        .transfer(to, amountBN)
+        .estimateGas({ gas: 1000000 });
+    }
+    gas = gas * 1.1;
+    if (estimate) {
+      return jc.wallet.generateGasShow(gas);
+    }
     return contract.methods.transfer(to, amountBN).send({
       from,
-      gas: gas || 1000000,
+      gas,
     });
   }
 }
diff --git a/src/standards/ERC721Standard.ts b/src/standards/ERC721Standard.ts
index 6329ccf..7ec8f3d 100644
--- a/src/standards/ERC721Standard.ts
+++ b/src/standards/ERC721Standard.ts
@@ -1,13 +1,12 @@
-
-import Web3 from 'web3';
+import Web3 from "web3";
 import { abiERC721 } from "../abis/abiERC721";
-import { timeoutFetch } from '../util/net.util';
-import { getFormattedIpfsUrl } from '../util/wallet.util';
+import { timeoutFetch } from "../util/net.util";
+import { getFormattedIpfsUrl } from "../util/wallet.util";
 
-export const ERC721 = 'ERC721';
-export const ERC721_INTERFACE_ID = '0x80ac58cd';
-export const ERC721_METADATA_INTERFACE_ID = '0x5b5e139f';
-export const ERC721_ENUMERABLE_INTERFACE_ID = '0x780e9d63';
+export const ERC721 = "ERC721";
+export const ERC721_INTERFACE_ID = "0x80ac58cd";
+export const ERC721_METADATA_INTERFACE_ID = "0x5b5e139f";
+export const ERC721_ENUMERABLE_INTERFACE_ID = "0x780e9d63";
 
 export class ERC721Standard {
   private web3: Web3;
@@ -23,11 +22,11 @@ export class ERC721Standard {
    * @returns Promise resolving to whether the contract implements ERC721Metadata interface.
    */
   contractSupportsMetadataInterface = async (
-    address: string,
+    address: string
   ): Promise<boolean> => {
     return this.contractSupportsInterface(
       address,
-      ERC721_METADATA_INTERFACE_ID,
+      ERC721_METADATA_INTERFACE_ID
     );
   };
 
@@ -38,11 +37,11 @@ export class ERC721Standard {
    * @returns Promise resolving to whether the contract implements ERC721Enumerable interface.
    */
   contractSupportsEnumerableInterface = async (
-    address: string,
+    address: string
   ): Promise<boolean> => {
     return this.contractSupportsInterface(
       address,
-      ERC721_ENUMERABLE_INTERFACE_ID,
+      ERC721_ENUMERABLE_INTERFACE_ID
     );
   };
 
@@ -53,7 +52,7 @@ export class ERC721Standard {
    * @returns Promise resolving to whether the contract implements ERC721 interface.
    */
   contractSupportsBase721Interface = async (
-    address: string,
+    address: string
   ): Promise<boolean> => {
     return this.contractSupportsInterface(address, ERC721_INTERFACE_ID);
   };
@@ -69,21 +68,20 @@ export class ERC721Standard {
   getCollectibleTokenId = async (
     address: string,
     selectedAddress: string,
-    index: number,
+    index: number
   ): Promise<string> => {
     const contract = new this.web3.eth.Contract(abiERC721, address);
     return new Promise<string>((resolve, reject) => {
-      contract.methods.tokenOfOwnerByIndex(
-        selectedAddress,
-        index).call((error: Error, result: string) => {
+      contract.methods
+        .tokenOfOwnerByIndex(selectedAddress, index)
+        .call((error: Error, result: string) => {
           /* istanbul ignore if */
           if (error) {
             reject(error);
             return;
           }
           resolve(result);
-        },
-      );
+        });
     });
   };
 
@@ -93,16 +91,16 @@ export class ERC721Standard {
   ): Promise<number> => {
     const contract = new this.web3.eth.Contract(abiERC721, address);
     return new Promise<number>((resolve, reject) => {
-      contract.methods.balanceOf(
-        selectedAddress).call((error: Error, result: number) => {
+      contract.methods
+        .balanceOf(selectedAddress)
+        .call((error: Error, result: number) => {
           /* istanbul ignore if */
           if (error) {
             reject(error);
             return;
           }
           resolve(result);
-        },
-      );
+        });
     });
   };
 
@@ -116,20 +114,22 @@ export class ERC721Standard {
   getTokenURI = async (address: string, tokenId: string): Promise<string> => {
     const contract = new this.web3.eth.Contract(abiERC721, address);
     const supportsMetadata = await this.contractSupportsMetadataInterface(
-      address,
+      address
     );
     if (!supportsMetadata) {
-      throw new Error('Contract does not support ERC721 metadata interface.');
+      throw new Error("Contract does not support ERC721 metadata interface.");
     }
     return new Promise<string>((resolve, reject) => {
-      contract.methods.tokenURI(tokenId).call( (error: Error, result: string) => {
-        /* istanbul ignore if */
-        if (error) {
-          reject(error);
-          return;
-        }
-        resolve(result);
-      });
+      contract.methods
+        .tokenURI(tokenId)
+        .call((error: Error, result: string) => {
+          /* istanbul ignore if */
+          if (error) {
+            reject(error);
+            return;
+          }
+          resolve(result);
+        });
     });
   };
 
@@ -183,7 +183,7 @@ export class ERC721Standard {
   async getOwnerOf(address: string, tokenId: string): Promise<string> {
     const contract = new this.web3.eth.Contract(abiERC721, address);
     return new Promise<string>((resolve, reject) => {
-      contract.methods.ownerOf(tokenId).call( (error: Error, result: string) => {
+      contract.methods.ownerOf(tokenId).call((error: Error, result: string) => {
         /* istanbul ignore if */
         if (error) {
           reject(error);
@@ -203,20 +203,20 @@ export class ERC721Standard {
    */
   private contractSupportsInterface = async (
     address: string,
-    interfaceId: string,
+    interfaceId: string
   ): Promise<boolean> => {
     const contract = new this.web3.eth.Contract(abiERC721, address);
     return new Promise<boolean>((resolve, reject) => {
-      contract.methods.supportsInterface(
-        interfaceId).call((error: Error, result: boolean) => {
+      contract.methods
+        .supportsInterface(interfaceId)
+        .call((error: Error, result: boolean) => {
           /* istanbul ignore if */
           if (error) {
             reject(error);
             return;
           }
           resolve(result);
-        },
-      );
+        });
     });
   };
 
@@ -231,7 +231,7 @@ export class ERC721Standard {
   getDetails = async (
     address: string,
     ipfsGateway: string,
-    tokenId?: string,
+    tokenId?: string
   ): Promise<{
     standard: string;
     tokenURI: string | undefined;
@@ -262,14 +262,14 @@ export class ERC721Standard {
     if (tokenId) {
       try {
         tokenURI = await this.getTokenURI(address, tokenId);
-        if (tokenURI.startsWith('ipfs://')) {
+        if (tokenURI.startsWith("ipfs://")) {
           tokenURI = getFormattedIpfsUrl(ipfsGateway, tokenURI, true);
         }
 
         const response = await timeoutFetch(tokenURI);
         const object = await response.json();
-        image = object ? object.image : ''
-        if (image.startsWith('ipfs://')) {
+        image = object ? object.image : "";
+        if (image.startsWith("ipfs://")) {
           image = getFormattedIpfsUrl(ipfsGateway, image, true);
         }
       } catch {
@@ -286,24 +286,34 @@ export class ERC721Standard {
     };
   };
 
-
   async transfer({
     address,
     from,
     to,
     tokenId,
     gas,
+    estimate,
   }: {
     address: string;
     from: string;
     to: string;
     tokenId: string;
     gas?: number;
+    estimate: number;
   }) {
     const contract = new this.web3.eth.Contract(abiERC721, address);
+    if (!gas) {
+      gas = await contract.methods
+        .safeTransferFrom(from, to, tokenId)
+        .estimateGas({ gas: 1000000 });
+    }
+    gas = gas * 1.1;
+    if (estimate) {
+      return jc.wallet.generateGasShow(gas);
+    }
     return contract.methods.safeTransferFrom(from, to, tokenId).send({
       from,
-      gas: gas || 1000000,
+      gas,
     });
   }
-}
\ No newline at end of file
+}
diff --git a/src/standards/JCStandard.ts b/src/standards/JCStandard.ts
index c9777bf..5dcf8a4 100644
--- a/src/standards/JCStandard.ts
+++ b/src/standards/JCStandard.ts
@@ -5,6 +5,7 @@ import { abiERC1155 } from "../abis/abiERC1155";
 import { abiEvolveFactory } from "../abis/abiUserEvolveFactory";
 import { abiMinterFactory } from "../abis/abiUserMinterFactory";
 import { JC_CONTRACTS } from "../config/chain_config";
+import { SAMPLE_GAS } from "./ChainCommon";
 
 export class JCStandard {
   private web3: Web3;
@@ -17,28 +18,33 @@ export class JCStandard {
     addresses,
     values,
     signature,
+    gas,
+    estimate,
   }: {
     addresses: string[];
     values: string[];
     signature: string;
+    gas?: number;
+    estimate: number;
   }) {
     let address = JC_CONTRACTS[window.jc.wallet.currentChain.id].nftMall;
     const contract = new this.web3.eth.Contract(abiNftMall, address, {
       //@ts-ignore
       from: jc.wallet.currentAccAddr,
     });
-    //TODO:: increaseAllowance before call
-    let gas;
-    try {
-      gas = await contract.methods
-        .buy721NFT(addresses, values, signature)
-        .estimateGas({ gas: 1000000 });
-    } catch (err) {
-      console.log("estimategas with error: " + JSON.stringify(err));
+    if (!gas) {
+      try {
+        gas = await contract.methods
+          .buy721NFT(addresses, values, signature)
+          .estimateGas({ gas: SAMPLE_GAS });
+      } catch (err) {}
+      gas = gas ? gas * 1.1 : SAMPLE_GAS;
     }
-    gas = gas || 1000000;
     //@ts-ignore
     if (jc.wallet.isInternal) {
+      if (estimate) {
+        return jc.wallet.generateGasShow(gas);
+      }
       //@ts-ignore
       let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas);
       if (!ethEnough) {
@@ -55,7 +61,7 @@ export class JCStandard {
     }
     return contract.methods
       .buy721NFT(addresses, values, signature)
-      .send({ gas: (gas * 1.1) | 0 });
+      .send({ gas });
   }
 
   async buyNft1155({
@@ -64,24 +70,36 @@ export class JCStandard {
     ids,
     amounts,
     signature,
+    gas,
+    estimate,
   }: {
     addresses: string[];
     values: string[];
     ids: string[];
     amounts: string[];
     signature: string;
+    gas?: number;
+    estimate: number;
   }) {
     let address = JC_CONTRACTS[window.jc.wallet.currentChain.id].nftMall;
     const contract = new this.web3.eth.Contract(abiNftMall, address, {
       //@ts-ignore
       from: jc.wallet.currentAccAddr,
     });
-    let gas = await contract.methods
-      .buy1155NFT(addresses, values, ids, amounts, signature)
-      .estimateGas({ gas: 1000000 });
-    gas = gas || 1000000;
+    if (!gas) {
+      try {
+        gas = await contract.methods
+          .buy1155NFT(addresses, values, ids, amounts, signature)
+          .estimateGas({ gas: SAMPLE_GAS });
+      } catch (err) {}
+      gas = gas ? gas * 1.1 : SAMPLE_GAS;
+    }
+
     //@ts-ignore
     if (jc.wallet.isInternal) {
+      if (estimate) {
+        return jc.wallet.generateGasShow(gas);
+      }
       //@ts-ignore
       let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas);
       if (!ethEnough) {
@@ -97,7 +115,7 @@ export class JCStandard {
     }
     return contract.methods
       .buy1155NFT(addresses, values, ids, amounts, signature)
-      .send({ gas: (gas * 1.1) | 0 });
+      .send({ gas });
   }
 
   async evolve721NFT({
@@ -106,24 +124,36 @@ export class JCStandard {
     startTime,
     nonce,
     signature,
+    gas,
+    estimate,
   }: {
     nftAddress: string;
     tokenIds: string[];
     startTime: number;
     nonce: string;
     signature: string;
+    gas?: number;
+    estimate: number;
   }) {
     let address = JC_CONTRACTS[window.jc.wallet.currentChain.id].evolveFactory;
     const contract = new this.web3.eth.Contract(abiEvolveFactory, address, {
       //@ts-ignore
       from: jc.wallet.currentAccAddr,
     });
-    let gas = await contract.methods
-      .evolve721NFT(nftAddress, tokenIds, startTime, nonce, signature)
-      .estimateGas({ gas: 1000000 });
-    gas = gas || 1000000;
+    if (!gas) {
+      try {
+        gas = await contract.methods
+          .evolve721NFT(nftAddress, tokenIds, startTime, nonce, signature)
+          .estimateGas({ gas: SAMPLE_GAS });
+      } catch (err) {}
+      gas = gas ? gas * 1.1 : SAMPLE_GAS;
+    }
+
     //@ts-ignore
     if (jc.wallet.isInternal) {
+      if (estimate) {
+        return jc.wallet.generateGasShow(gas);
+      }
       //@ts-ignore
       let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas);
       if (!ethEnough) {
@@ -147,23 +177,35 @@ export class JCStandard {
     startTime,
     nonce,
     signature,
+    gas,
+    estimate,
   }: {
     tokenIds: string[];
     startTime: number;
     nonce: string;
     signature: string;
+    gas?: number;
+    estimate: number;
   }) {
     let address = JC_CONTRACTS[window.jc.wallet.currentChain.id].evolveFactory;
     const contract = new this.web3.eth.Contract(abiEvolveFactory, address, {
       //@ts-ignore
       from: jc.wallet.currentAccAddr,
     });
-    let gas = await contract.methods
-      .evolveChip(tokenIds, startTime, nonce, signature)
-      .estimateGas({ gas: 1000000 });
-    gas = gas || 1000000;
+    if (gas) {
+      try {
+        gas = await contract.methods
+          .evolveChip(tokenIds, startTime, nonce, signature)
+          .estimateGas({ gas: SAMPLE_GAS });
+      } catch (err) {}
+      gas = gas ? gas * 1.1 : SAMPLE_GAS;
+    }
+
     //@ts-ignore
     if (jc.wallet.isInternal) {
+      if (estimate) {
+        return jc.wallet.generateGasShow(gas);
+      }
       //@ts-ignore
       let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas);
       if (!ethEnough) {
@@ -179,7 +221,7 @@ export class JCStandard {
     }
     return contract.methods
       .evolveChip(tokenIds, startTime, nonce, signature)
-      .send({ gas: (gas * 1.1) | 0 });
+      .send({ gas });
   }
 
   async mintShardBatchUser({
@@ -188,24 +230,36 @@ export class JCStandard {
     startTime,
     nonce,
     signature,
+    gas,
+    estimate,
   }: {
     tokenIds: string[];
     amounts: number[];
     startTime: number;
     nonce: string;
     signature: string;
+    gas?: number;
+    estimate: number;
   }) {
     let address = JC_CONTRACTS[window.jc.wallet.currentChain.id].minterFactory;
     const contract = new this.web3.eth.Contract(abiMinterFactory, address, {
       //@ts-ignore
       from: jc.wallet.currentAccAddr,
     });
-    let gas = await contract.methods
-      .mintShardBatchUser(tokenIds, amounts, startTime, nonce, signature)
-      .estimateGas({ gas: 1000000 });
-    gas = gas || 1000000;
+    if (!gas) {
+      try {
+        gas = await contract.methods
+          .mintShardBatchUser(tokenIds, amounts, startTime, nonce, signature)
+          .estimateGas({ gas: SAMPLE_GAS });
+      } catch (err) {}
+      gas = gas ? gas * 1.1 : SAMPLE_GAS;
+    }
+
     //@ts-ignore
     if (jc.wallet.isInternal) {
+      if (estimate) {
+        return jc.wallet.generateGasShow(gas);
+      }
       //@ts-ignore
       let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas);
       if (!ethEnough) {
@@ -221,7 +275,7 @@ export class JCStandard {
     }
     return contract.methods
       .mintShardBatchUser(tokenIds, amounts, startTime, nonce, signature)
-      .send({ gas: (gas * 1.1) | 0 });
+      .send({ gas });
   }
 
   async shardMixByUser({
@@ -234,6 +288,8 @@ export class JCStandard {
     startTime,
     nonce,
     signature,
+    gas,
+    estimate,
   }: {
     tokenId: string;
     nftType: number;
@@ -244,28 +300,38 @@ export class JCStandard {
     startTime: number;
     nonce: string;
     signature: string;
+    gas?: number;
+    estimate: number;
   }) {
     let address = JC_CONTRACTS[window.jc.wallet.currentChain.id].minterFactory;
     const contract = new this.web3.eth.Contract(abiMinterFactory, address, {
       //@ts-ignore
       from: jc.wallet.currentAccAddr,
     });
-    let gas = await contract.methods
-      .shardMixByUser(
-        tokenId,
-        nftType,
-        payToken,
-        payAmount,
-        ids,
-        amounts,
-        startTime,
-        nonce,
-        signature
-      )
-      .estimateGas({ gas: 1000000 });
-    gas = gas || 1000000;
+    if (!gas) {
+      try {
+        let gas = await contract.methods
+          .shardMixByUser(
+            tokenId,
+            nftType,
+            payToken,
+            payAmount,
+            ids,
+            amounts,
+            startTime,
+            nonce,
+            signature
+          )
+          .estimateGas({ gas: SAMPLE_GAS });
+      } catch (err) {}
+      gas = gas ? gas * 1.1 : SAMPLE_GAS;
+    }
+
     //@ts-ignore
     if (jc.wallet.isInternal) {
+      if (estimate) {
+        return jc.wallet.generateGasShow(gas);
+      }
       //@ts-ignore
       let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas);
       if (!ethEnough) {
@@ -292,7 +358,7 @@ export class JCStandard {
         nonce,
         signature
       )
-      .send({ gas: (gas * 1.1) | 0 });
+      .send({ gas });
   }
 
   async pluginChip({
@@ -301,12 +367,16 @@ export class JCStandard {
     chipIds,
     slots,
     signature,
+    gas,
+    estimate,
   }: {
     addresses: string[];
     values: string[];
     chipIds: string[];
     slots: string[];
     signature: string;
+    gas?: number;
+    estimate: number;
   }) {
     let lockerAddress =
       JC_CONTRACTS[window.jc.wallet.currentChain.id].chipLocker;
@@ -322,11 +392,31 @@ export class JCStandard {
         jumpToWallet();
       }, 1500);
     }
-    let gas1 = await chipInstance.methods
-      .setApprovalForAll(lockerAddress, true)
-      .estimateGas({ gas: 1000000 });
-    gas1 = gas1 || 1000000;
+    let gas1 = SAMPLE_GAS;
+    let gas0 = SAMPLE_GAS;
+    try {
+      gas1 = await chipInstance.methods
+        .setApprovalForAll(lockerAddress, true)
+        .estimateGas({ gas: SAMPLE_GAS });
+      gas0 = await contract.methods
+        .pluginChip(addresses, values, chipIds, slots, signature)
+        .estimateGas({ gas: SAMPLE_GAS });
+    } catch (err) {}
+    if (!gas) {
+      gas1 = gas1 ? gas1 * 1.1 : SAMPLE_GAS;
+      gas0 = gas0 ? gas0 * 1.1 : SAMPLE_GAS;
+      gas = gas0 + gas1;
+    } else {
+      gas0 = gas - gas1;
+    }
+    if (gas < gas1) {
+      throw "gas is too low";
+    }
+
     if (jc.wallet.isInternal) {
+      if (estimate) {
+        return jc.wallet.generateGasShow(gas);
+      }
       let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas1);
       if (!ethEnough) {
         throw "eth not enough";
@@ -334,12 +424,8 @@ export class JCStandard {
     }
     await chipInstance.methods
       .setApprovalForAll(lockerAddress, true)
-      .send({ gas: (gas1 * 1.1) | 0 });
+      .send({ gas: gas1 });
 
-    let gas0 = await contract.methods
-      .pluginChip(addresses, values, chipIds, slots, signature)
-      .estimateGas({ gas: 1000000 });
-    gas0 = gas0 || 1000000;
     if (jc.wallet.isInternal) {
       let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas0);
       if (!ethEnough) {
@@ -354,7 +440,7 @@ export class JCStandard {
     }
     return await contract.methods
       .pluginChip(addresses, values, chipIds, slots, signature)
-      .send({ gas: (gas0 * 1.1) | 0 });
+      .send({ gas: gas0 });
   }
 
   async unplugChip({
@@ -363,28 +449,38 @@ export class JCStandard {
     chipIds,
     slots,
     signature,
+    gas,
+    estimate,
   }: {
     addresses: string[];
     values: string[];
     chipIds: string[];
     slots: string[];
     signature: string;
+    gas?: number;
+    estimate: number;
   }) {
     let lockerAddress =
       JC_CONTRACTS[window.jc.wallet.currentChain.id].chipLocker;
     const contract = new this.web3.eth.Contract(abiChipLocker, lockerAddress, {
       from: jc.wallet.currentAccAddr,
     });
-    let gas0 = 1000000;
-    try {
-      gas0 = await contract.methods
-        .unplugChip(addresses, values, chipIds, slots, signature)
-        .estimateGas({ gas: 1000000 });
-    } catch (err) {
-      console.log(err);
+    if (!gas) {
+      try {
+        gas = await contract.methods
+          .unplugChip(addresses, values, chipIds, slots, signature)
+          .estimateGas({ gas: 1000000 });
+      } catch (err) {
+        console.log(err);
+      }
+      gas = gas ? gas * 1.1 : SAMPLE_GAS;
     }
+
     if (jc.wallet.isInternal) {
-      let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas0);
+      if (estimate) {
+        return jc.wallet.generateGasShow(gas);
+      }
+      let ethEnough = await jc.wallet.chainCommon.checkEthEnough(gas);
       if (!ethEnough) {
         throw "eth not enough";
       }
@@ -397,6 +493,6 @@ export class JCStandard {
     }
     return await contract.methods
       .unplugChip(addresses, values, chipIds, slots, signature)
-      .send({ gas: (gas0 * 1.1) | 0 });
+      .send({ gas });
   }
 }