Address
0x4e1dcf7ad4e460cfd30791ccc4f9c8a4f820ec67Current Holdings
$0.00
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0
First Active
2025-01-06
block 22,377,902
Last Active
11 days ago
block 27,457,073
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exact matchSafeProxyFactorysolc 0.7.6+commit.7338295fruntime exact · creation not verified
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/**
* @title IProxy - Helper interface to access the singleton address of the Proxy on-chain.
* @author Richard Meissner - @rmeissner
*/
interface IProxy {
function masterCopy() external view returns (address);
}
/**
* @title SafeProxy - Generic proxy contract allows to execute all transactions applying the code of a master contract.
* @author Stefan George - <stefan@gnosis.io>
* @author Richard Meissner - <richard@gnosis.io>
*/
contract SafeProxy {
// Singleton always needs to be first declared variable, to ensure that it is at the same location in the contracts to which calls are delegated.
// To reduce deployment costs this variable is internal and needs to be retrieved via `getStorageAt`
address internal singleton;
/**
* @notice Constructor function sets address of singleton contract.
* @param _singleton Singleton address.
*/
constructor(address _singleton) {
require(_singleton != address(0), "Invalid singleton address provided");
singleton = _singleton;
}
/// @dev Fallback function forwards all transactions and returns all received return data.
fallback() external payable {
// solhint-disable-next-line no-inline-assembly
assembly {
let _singleton := and(sload(0), 0xffffffffffffffffffffffffffffffffffffffff)
// 0xa619486e == keccak("masterCopy()"). The value is right padded to 32-bytes with 0s
if eq(calldataload(0), 0xa619486e00000000000000000000000000000000000000000000000000000000) {
mstore(0, _singleton)
return(0, 0x20)
}
calldatacopy(0, 0, calldatasize())
let success := delegatecall(gas(), _singleton, 0, calldatasize(), 0, 0)
returndatacopy(0, 0, returndatasize())
if eq(success, 0) {
revert(0, returndatasize())
}
return(0, returndatasize())
}
}
}