Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2020-09-02
*/

pragma solidity ^0.5.0;


/**
 * @title ERC20FeeProxy
 * @notice This contract performs an ERC20 token transfer, with a Fee sent to a third address and stores a reference
 */
contract ERC20FeeProxy {
  // Event to declare a transfer with a reference
  event TransferWithReferenceAndFee(
    address tokenAddress,
    address to,
    uint256 amount,
    bytes indexed paymentReference,
    uint256 feeAmount,
    address feeAddress
  );

  // Fallback function returns funds to the sender
  function() external payable {
    revert("not payable fallback");
  }

  /**
    * @notice Performs a ERC20 token transfer with a reference and a transfer to a second address for the payment of a fee
    * @param _tokenAddress Address of the ERC20 token smart contract
    * @param _to Transfer recipient
    * @param _amount Amount to transfer
    * @param _paymentReference Reference of the payment related
    * @param _feeAmount The amount of the payment fee
    * @param _feeAddress The fee recipient
    */
  function transferFromWithReferenceAndFee(
    address _tokenAddress,
    address _to,
    uint256 _amount,
    bytes calldata _paymentReference,
    uint256 _feeAmount,
    address _feeAddress
    ) external
    {
    require(safeTransferFrom(_tokenAddress, _to, _amount), "payment transferFrom() failed");
    if (_feeAmount > 0 && _feeAddress != address(0)) {
      require(safeTransferFrom(_tokenAddress, _feeAddress, _feeAmount), "fee transferFrom() failed");
    }
    emit TransferWithReferenceAndFee(
      _tokenAddress,
      _to,
      _amount,
      _paymentReference,
      _feeAmount,
      _feeAddress
    );
  }

  /**
   * @notice Call transferFrom ERC20 function and validates the return data of a ERC20 contract call.
   * @dev This is necessary because of non-standard ERC20 tokens that don't have a return value.
   * @return The return value of the ERC20 call, returning true for non-standard tokens
   */
  function safeTransferFrom(address _tokenAddress, address _to, uint256 _amount) internal returns (bool result) {
    /* solium-disable security/no-inline-assembly */
    // check if the address is a contract
    assembly {
      if iszero(extcodesize(_tokenAddress)) { revert(0, 0) }
    }
    
    // solium-disable-next-line security/no-low-level-calls
    (bool success, ) = _tokenAddress.call(abi.encodeWithSignature(
      "transferFrom(address,address,uint256)",
      msg.sender,
      _to,
      _amount
    ));

    assembly {
        switch returndatasize()
        case 0 { // not a standard erc20
            result := 1
        }
        case 32 { // standard erc20
            returndatacopy(0, 0, 32)
            result := mload(0)
        }
        default { // anything else, should revert for safety
            revert(0, 0)
        }
    }

    require(success, "transferFrom() has been reverted");

    /* solium-enable security/no-inline-assembly */
    return result;
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"tokenAddress","type":"address"},{"indexed":false,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"bytes","name":"paymentReference","type":"bytes"},{"indexed":false,"internalType":"uint256","name":"feeAmount","type":"uint256"},{"indexed":false,"internalType":"address","name":"feeAddress","type":"address"}],"name":"TransferWithReferenceAndFee","type":"event"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":false,"inputs":[{"internalType":"address","name":"_tokenAddress","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"bytes","name":"_paymentReference","type":"bytes"},{"internalType":"uint256","name":"_feeAmount","type":"uint256"},{"internalType":"address","name":"_feeAddress","type":"address"}],"name":"transferFromWithReferenceAndFee","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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

182:2840:0:-;;;;;;;;;;;;;;;;;;544:30;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;1037:647;;8:9:-1;5:2;;;30:1;27;20:12;5:2;1037:647:0;;;;;;13:3:-1;8;5:12;2:2;;;30:1;27;20:12;2:2;1037:647:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;21:11:-1;8;5:28;2:2;;;46:1;43;36:12;2:2;1037:647:0;;35:9:-1;28:4;12:14;8:25;5:40;2:2;;;58:1;55;48:12;2:2;1037:647:0;;;;;;100:9:-1;95:1;81:12;77:20;67:8;63:35;60:50;39:11;25:12;22:29;11:107;8:2;;;131:1;128;121:12;8:2;1037:647:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;:::i;:::-;;;1272:45;1289:13;1304:3;1309:7;1272:16;:45::i;:::-;1264:87;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;1375:1;1362:10;:14;:43;;;;;1403:1;1380:25;;:11;:25;;;;1362:43;1358:160;;;1424:56;1441:13;1456:11;1469:10;1424:16;:56::i;:::-;1416:94;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;1358:160;1615:17;;1529:149;;;;;30:3:-1;22:6;14;1:33;57:3;49:6;45:16;35:26;;1529:149:0;;;;;;;;;;;;;;1565:13;1587:3;1599:7;1641:10;1660:11;1529:149;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;1037:647;;;;;;;:::o;1994:1025::-;2091:11;2248:13;2236:26;2226:2;;2276:1;2273;2266:12;2226:2;2361:12;2379:13;:18;;2478:10;2497:3;2509:7;2398:125;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;49:4:-1;39:7;30;26:21;22:32;13:7;6:49;2398:125:0;;;;;;;38:4:-1;29:7;25:18;67:10;61:17;96:58;199:8;192:4;186;182:15;179:29;167:10;160:49;0:215;;;2398:125:0;2379:145;;;;;;;;;;;;;36:153:-1;66:2;61:3;58:11;36:153;;182:3;176:10;171:3;164:23;98:2;93:3;89:12;82:19;;123:2;118:3;114:12;107:19;;148:2;143:3;139:12;132:19;;36:153;;;274:1;267:3;263:2;259:12;254:3;250:22;246:30;315:4;311:9;305:3;299:10;295:26;356:4;350:3;344:10;340:21;389:7;380;377:20;372:3;365:33;3:399;;;2379:145:0;;;;;;;;;;;;;;;;;;;;;;;;14:1:-1;21;16:31;;;;75:4;69:11;64:16;;144:4;140:9;133:4;115:16;111:27;107:43;104:1;100:51;94:4;87:65;169:16;166:1;159:27;225:16;222:1;215:4;212:1;208:12;193:49;7:242;;16:31;36:4;31:9;;7:242;;2360:164:0;;;2560:16;2591:1;2586:68;;;;2669:2;2664:108;;;;2858:1;2855;2848:12;2586:68;2642:1;2632:11;;2586:68;;2664:108;2726:2;2723:1;2720;2705:24;2759:1;2753:8;2743:18;;2553:318;;2894:7;2886:52;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3007:6;3000:13;;;1994:1025;;;;;:::o

bzzr://c6f132923802b0fe75b088b51751fdfa1deca9f04c82c451d7dddabd87426047