Address Details
contract

0xC22834581EbC8527d974F8a1c97E1bEA4EF910BC

Creator
0x914d7f–5643d7 at 0x83425f–330b50
Balance
0 CELO ( )
Locked CELO Balance
0.00 CELO
Voting CELO Balance
0.00 CELO
Pending Unlocked Gold
0.00 CELO
Tokens
Fetching tokens...
Transactions
1,844 Transactions
Transfers
369 Transfers
Gas Used
508,597,875
Last Balance Update
28927001
This contract has been verified via Sourcify. View contract in Sourcify repository
Contract name:
GnosisSafeProxyFactory




Optimization enabled
false
Compiler version
v0.7.6+commit.7338295f




EVM Version
istanbul




Verified at
2021-09-22T10:33:43.093491Z

Contract source code

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;

import "./GnosisSafeProxy.sol";
import "./IProxyCreationCallback.sol";

/// @title Proxy Factory - Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
/// @author Stefan George - <[email protected]>
contract GnosisSafeProxyFactory {
    event ProxyCreation(GnosisSafeProxy proxy, address singleton);

    /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
    /// @param singleton Address of singleton contract.
    /// @param data Payload for message call sent to new proxy contract.
    function createProxy(address singleton, bytes memory data) public returns (GnosisSafeProxy proxy) {
        proxy = new GnosisSafeProxy(singleton);
        if (data.length > 0)
            // solhint-disable-next-line no-inline-assembly
            assembly {
                if eq(call(gas(), proxy, 0, add(data, 0x20), mload(data), 0, 0), 0) {
                    revert(0, 0)
                }
            }
        emit ProxyCreation(proxy, singleton);
    }

    /// @dev Allows to retrieve the runtime code of a deployed Proxy. This can be used to check that the expected Proxy was deployed.
    function proxyRuntimeCode() public pure returns (bytes memory) {
        return type(GnosisSafeProxy).runtimeCode;
    }

    /// @dev Allows to retrieve the creation code used for the Proxy deployment. With this it is easily possible to calculate predicted address.
    function proxyCreationCode() public pure returns (bytes memory) {
        return type(GnosisSafeProxy).creationCode;
    }

    /// @dev Allows to create new proxy contact using CREATE2 but it doesn't run the initializer.
    ///      This method is only meant as an utility to be called from other methods
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function deployProxyWithNonce(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce
    ) internal returns (GnosisSafeProxy proxy) {
        // If the initializer changes the proxy address should change too. Hashing the initializer data is cheaper than just concatinating it
        bytes32 salt = keccak256(abi.encodePacked(keccak256(initializer), saltNonce));
        bytes memory deploymentData = abi.encodePacked(type(GnosisSafeProxy).creationCode, uint256(uint160(_singleton)));
        // solhint-disable-next-line no-inline-assembly
        assembly {
            proxy := create2(0x0, add(0x20, deploymentData), mload(deploymentData), salt)
        }
        require(address(proxy) != address(0), "Create2 call failed");
    }

    /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function createProxyWithNonce(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce
    ) public returns (GnosisSafeProxy proxy) {
        proxy = deployProxyWithNonce(_singleton, initializer, saltNonce);
        if (initializer.length > 0)
            // solhint-disable-next-line no-inline-assembly
            assembly {
                if eq(call(gas(), proxy, 0, add(initializer, 0x20), mload(initializer), 0, 0), 0) {
                    revert(0, 0)
                }
            }
        emit ProxyCreation(proxy, _singleton);
    }

    /// @dev Allows to create new proxy contact, execute a message call to the new proxy and call a specified callback within one transaction
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    /// @param callback Callback that will be invoced after the new proxy contract has been successfully deployed and initialized.
    function createProxyWithCallback(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce,
        IProxyCreationCallback callback
    ) public returns (GnosisSafeProxy proxy) {
        uint256 saltNonceWithCallback = uint256(keccak256(abi.encodePacked(saltNonce, callback)));
        proxy = createProxyWithNonce(_singleton, initializer, saltNonceWithCallback);
        if (address(callback) != address(0)) callback.proxyCreated(proxy, _singleton, initializer, saltNonce);
    }

    /// @dev Allows to get the address for a new proxy contact created via `createProxyWithNonce`
    ///      This method is only meant for address calculation purpose when you use an initializer that would revert,
    ///      therefore the response is returned with a revert. When calling this method set `from` to the address of the proxy factory.
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function calculateCreateProxyWithNonceAddress(
        address _singleton,
        bytes calldata initializer,
        uint256 saltNonce
    ) external returns (GnosisSafeProxy proxy) {
        proxy = deployProxyWithNonce(_singleton, initializer, saltNonce);
        revert(string(abi.encodePacked(proxy)));
    }
}

Contract ABI

[{"type":"event","name":"ProxyCreation","inputs":[{"type":"address","name":"proxy","internalType":"contract GnosisSafeProxy","indexed":false},{"type":"address","name":"singleton","internalType":"address","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"address","name":"proxy","internalType":"contract GnosisSafeProxy"}],"name":"calculateCreateProxyWithNonceAddress","inputs":[{"type":"address","name":"_singleton","internalType":"address"},{"type":"bytes","name":"initializer","internalType":"bytes"},{"type":"uint256","name":"saltNonce","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"address","name":"proxy","internalType":"contract GnosisSafeProxy"}],"name":"createProxy","inputs":[{"type":"address","name":"singleton","internalType":"address"},{"type":"bytes","name":"data","internalType":"bytes"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"address","name":"proxy","internalType":"contract GnosisSafeProxy"}],"name":"createProxyWithCallback","inputs":[{"type":"address","name":"_singleton","internalType":"address"},{"type":"bytes","name":"initializer","internalType":"bytes"},{"type":"uint256","name":"saltNonce","internalType":"uint256"},{"type":"address","name":"callback","internalType":"contract IProxyCreationCallback"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"address","name":"proxy","internalType":"contract GnosisSafeProxy"}],"name":"createProxyWithNonce","inputs":[{"type":"address","name":"_singleton","internalType":"address"},{"type":"bytes","name":"initializer","internalType":"bytes"},{"type":"uint256","name":"saltNonce","internalType":"uint256"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"bytes","name":"","internalType":"bytes"}],"name":"proxyCreationCode","inputs":[]},{"type":"function","stateMutability":"pure","outputs":[{"type":"bytes","name":"","internalType":"bytes"}],"name":"proxyRuntimeCode","inputs":[]}]

Contract Creation Code

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Deployed ByteCode

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