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Latest 1 internal transaction
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16514506 | 1345 days ago | Contract Creation | 0 xDAI |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x21a42669...23D67509d The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
TokenProxy
Compiler Version
v0.4.24+commit.e67f0147
Contract Source Code (Solidity)
/** *Submitted for verification at gnosisscan.io on 2023-01-09 */ pragma solidity 0.4.24; /** * @title Proxy * @dev Gives the possibility to delegate any call to a foreign implementation. */ contract Proxy { /** * @dev Tells the address of the implementation where every call will be delegated. * @return address of the implementation to which it will be delegated */ /* solcov ignore next */ function implementation() public view returns (address); /** * @dev Fallback function allowing to perform a delegatecall to the given implementation. * This function will return whatever the implementation call returns */ function() public payable { // solhint-disable-previous-line no-complex-fallback address _impl = implementation(); require(_impl != address(0)); assembly { /* 0x40 is the "free memory slot", meaning a pointer to next slot of empty memory. mload(0x40) loads the data in the free memory slot, so `ptr` is a pointer to the next slot of empty memory. It's needed because we're going to write the return data of delegatecall to the free memory slot. */ let ptr := mload(0x40) /* `calldatacopy` is copy calldatasize bytes from calldata First argument is the destination to which data is copied(ptr) Second argument specifies the start position of the copied data. Since calldata is sort of its own unique location in memory, 0 doesn't refer to 0 in memory or 0 in storage - it just refers to the zeroth byte of calldata. That's always going to be the zeroth byte of the function selector. Third argument, calldatasize, specifies how much data will be copied. calldata is naturally calldatasize bytes long (same thing as msg.data.length) */ calldatacopy(ptr, 0, calldatasize) /* delegatecall params explained: gas: the amount of gas to provide for the call. `gas` is an Opcode that gives us the amount of gas still available to execution _impl: address of the contract to delegate to ptr: to pass copied data calldatasize: loads the size of `bytes memory data`, same as msg.data.length 0, 0: These are for the `out` and `outsize` params. Because the output could be dynamic, these are set to 0, 0 so the output data will not be written to memory. The output data will be read using `returndatasize` and `returdatacopy` instead. result: This will be 0 if the call fails and 1 if it succeeds */ let result := delegatecall(gas, _impl, ptr, calldatasize, 0, 0) /* */ /* ptr current points to the value stored at 0x40, because we assigned it like ptr := mload(0x40). Because we use 0x40 as a free memory pointer, we want to make sure that the next time we want to allocate memory, we aren't overwriting anything important. So, by adding ptr and returndatasize, we get a memory location beyond the end of the data we will be copying to ptr. We place this in at 0x40, and any reads from 0x40 will now read from free memory */ mstore(0x40, add(ptr, returndatasize)) /* `returndatacopy` is an Opcode that copies the last return data to a slot. `ptr` is the slot it will copy to, 0 means copy from the beginning of the return data, and size is the amount of data to copy. `returndatasize` is an Opcode that gives us the size of the last return data. In this case, that is the size of the data returned from delegatecall */ returndatacopy(ptr, 0, returndatasize) /* if `result` is 0, revert. if `result` is 1, return `size` amount of data from `ptr`. This is the data that was copied to `ptr` from the delegatecall return data */ switch result case 0 { revert(ptr, returndatasize) } default { return(ptr, returndatasize) } } } } interface IPermittableTokenVersion { function version() external pure returns (string); } /** * @title TokenProxy * @dev Helps to reduces the size of the deployed bytecode for automatically created tokens, by using a proxy contract. */ contract TokenProxy is Proxy { // storage layout is copied from PermittableToken.sol string internal name; string internal symbol; uint8 internal decimals; mapping(address => uint256) internal balances; uint256 internal totalSupply; mapping(address => mapping(address => uint256)) internal allowed; address internal owner; bool internal mintingFinished; address internal bridgeContractAddr; // string public constant version = "1"; bytes32 internal DOMAIN_SEPARATOR; // bytes32 public constant PERMIT_TYPEHASH = 0xea2aa0a1be11a07ed86d755c93467f4f82362b452371d1ba94d1715123511acb; mapping(address => uint256) internal nonces; mapping(address => mapping(address => uint256)) internal expirations; /** * @dev Creates a non-upgradeable token proxy for PermitableToken.sol, initializes its eternalStorage. * @param _tokenImage address of the token image used for mirrowing all functions. * @param _name token name. * @param _symbol token symbol. * @param _decimals token decimals. * @param _chainId chain id for current network. */ constructor(address _tokenImage, string memory _name, string memory _symbol, uint8 _decimals, uint256 _chainId) public { string memory version = IPermittableTokenVersion(_tokenImage).version(); assembly { // EIP 1967 // bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1) sstore(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc, _tokenImage) } name = _name; symbol = _symbol; decimals = _decimals; owner = msg.sender; // msg.sender == HomeMultiAMBErc20ToErc677 mediator bridgeContractAddr = msg.sender; DOMAIN_SEPARATOR = keccak256( abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(_name)), keccak256(bytes(version)), _chainId, address(this) ) ); } /** * @dev Retrieves the implementation contract address, mirrowed token image. * @return token image address. */ function implementation() public view returns (address impl) { assembly { impl := sload(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc) } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"constant":true,"inputs":[],"name":"implementation","outputs":[{"name":"impl","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_tokenImage","type":"address"},{"name":"_name","type":"string"},{"name":"_symbol","type":"string"},{"name":"_decimals","type":"uint8"},{"name":"_chainId","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"}]
Deployed Bytecode
0x608060405260043610603e5763ffffffff7c01000000000000000000000000000000000000000000000000000000006000350416635c60da1b81146092575b6000604660cd565b905073ffffffffffffffffffffffffffffffffffffffff81161515606957600080fd5b60405136600082376000803683855af43d82016040523d6000833e808015608e573d83f35b3d83fd5b348015609d57600080fd5b5060a460cd565b6040805173ffffffffffffffffffffffffffffffffffffffff9092168252519081900360200190f35b7f360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc54905600a165627a7a72305820aa9e57d69a87d505ef92ae24ac9bead296073ec94235380eb982d587ab7f43150029
Deployed Bytecode Sourcemap
4887:2504:0:-;;;;;;;;;;;;;;;;;;;;715:13;731:16;:14;:16::i;:::-;715:32;-1:-1:-1;766:19:0;;;;;758:28;;;;;;1224:4;1218:11;2005:12;2002:1;1997:3;1984:34;2936:1;2933;2919:12;2914:3;2907:5;2902:3;2889:49;3626:14;3621:3;3617:24;3611:4;3604:38;4136:14;4133:1;4128:3;4113:38;4418:6;4442:76;;;;4579:14;4574:3;4567:27;4442:76;4484:14;4479:3;4472:27;7193:195;;8:9:-1;5:2;;;30:1;27;20:12;5:2;7193:195:0;;;;;;;;;;;;;;;;;;;;;;;;7303:66;7297:73;;7274:107::o
Swarm Source
bzzr://aa9e57d69a87d505ef92ae24ac9bead296073ec94235380eb982d587ab7f4315
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