- Contract name:
- ImmutableOwnerCreate2Factory
- Optimization enabled
- false
- Compiler version
- v0.8.9+commit.e5eed63a
- Verified at
- 2023-11-08T19:57:01.757095Z
Constructor Arguments
00000000000000000000000004c8c6c56dab836f8bd62cb6884371507e706806
Arg [0] (address) : 0x04c8c6c56dab836f8bd62cb6884371507e706806
contracts/ImmutableOwnerCreate2Factory.sol
// SPDX-License-Identifier: CC0-1.0
pragma solidity 0.8.9;
import { Create2 } from "@openzeppelin/contracts/utils/Create2.sol";
contract ImmutableOwnerCreate2Factory {
address public owner;
event Deployed(address addr);
modifier onlyOwner() {
require(msg.sender == owner, "ImmutableOwnerCreate2Factory: Only Owner can call this function.");
_;
}
constructor(address _owner) {
owner = _owner;
}
function deploy(bytes32 salt, bytes memory bytecode) onlyOwner external returns (address addr) {
addr = Create2.deploy(0, salt, bytecode);
emit Deployed(addr);
}
function computeAddress(bytes32 salt, bytes32 bytecodeHash) external view returns (address) {
return Create2.computeAddress(salt, bytecodeHash, address(this));
}
}
@openzeppelin/contracts/utils/Create2.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Create2.sol)
pragma solidity ^0.8.0;
/**
* @dev Helper to make usage of the `CREATE2` EVM opcode easier and safer.
* `CREATE2` can be used to compute in advance the address where a smart
* contract will be deployed, which allows for interesting new mechanisms known
* as 'counterfactual interactions'.
*
* See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more
* information.
*/
library Create2 {
/**
* @dev Deploys a contract using `CREATE2`. The address where the contract
* will be deployed can be known in advance via {computeAddress}.
*
* The bytecode for a contract can be obtained from Solidity with
* `type(contractName).creationCode`.
*
* Requirements:
*
* - `bytecode` must not be empty.
* - `salt` must have not been used for `bytecode` already.
* - the factory must have a balance of at least `amount`.
* - if `amount` is non-zero, `bytecode` must have a `payable` constructor.
*/
function deploy(uint256 amount, bytes32 salt, bytes memory bytecode) internal returns (address addr) {
require(address(this).balance >= amount, "Create2: insufficient balance");
require(bytecode.length != 0, "Create2: bytecode length is zero");
/// @solidity memory-safe-assembly
assembly {
addr := create2(amount, add(bytecode, 0x20), mload(bytecode), salt)
}
require(addr != address(0), "Create2: Failed on deploy");
}
/**
* @dev Returns the address where a contract will be stored if deployed via {deploy}. Any change in the
* `bytecodeHash` or `salt` will result in a new destination address.
*/
function computeAddress(bytes32 salt, bytes32 bytecodeHash) internal view returns (address) {
return computeAddress(salt, bytecodeHash, address(this));
}
/**
* @dev Returns the address where a contract will be stored if deployed via {deploy} from a contract located at
* `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}.
*/
function computeAddress(bytes32 salt, bytes32 bytecodeHash, address deployer) internal pure returns (address addr) {
/// @solidity memory-safe-assembly
assembly {
let ptr := mload(0x40) // Get free memory pointer
// | | ↓ ptr ... ↓ ptr + 0x0B (start) ... ↓ ptr + 0x20 ... ↓ ptr + 0x40 ... |
// |-------------------|---------------------------------------------------------------------------|
// | bytecodeHash | CCCCCCCCCCCCC...CC |
// | salt | BBBBBBBBBBBBB...BB |
// | deployer | 000000...0000AAAAAAAAAAAAAAAAAAA...AA |
// | 0xFF | FF |
// |-------------------|---------------------------------------------------------------------------|
// | memory | 000000...00FFAAAAAAAAAAAAAAAAAAA...AABBBBBBBBBBBBB...BBCCCCCCCCCCCCC...CC |
// | keccak(start, 85) | ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑ |
mstore(add(ptr, 0x40), bytecodeHash)
mstore(add(ptr, 0x20), salt)
mstore(ptr, deployer) // Right-aligned with 12 preceding garbage bytes
let start := add(ptr, 0x0b) // The hashed data starts at the final garbage byte which we will set to 0xff
mstore8(start, 0xff)
addr := keccak256(start, 85)
}
}
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_owner","internalType":"address"}]},{"type":"event","name":"Deployed","inputs":[{"type":"address","name":"addr","internalType":"address","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"computeAddress","inputs":[{"type":"bytes32","name":"salt","internalType":"bytes32"},{"type":"bytes32","name":"bytecodeHash","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"address","name":"addr","internalType":"address"}],"name":"deploy","inputs":[{"type":"bytes32","name":"salt","internalType":"bytes32"},{"type":"bytes","name":"bytecode","internalType":"bytes"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]}]
Contract Creation Code
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