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ERC6551Registry.sol

The canonical ERC-6551 registry used to derive and deploy Seat accounts.

58 lines2.2 KBSolidity
Source of src/ERC6551Registry.sol, 58 lines of Solidity
1// SPDX-License-Identifier: MIT
2pragma solidity ^0.8.24;
3 
4import {Create2} from "@openzeppelin/contracts/utils/Create2.sol";
5import {IERC6551Registry} from "./interfaces/IK401Interfaces.sol";
6 
7/**
8 * @title ERC6551Registry
9 * @notice Canonical-layout ERC-6551 registry. Deploys ERC-1167 proxies whose runtime
10 * code carries `abi.encode(salt, chainId, tokenContract, tokenId)` as a footer,
11 * exactly as the reference registry at 0x000000006551c19487814612e58FE06813775758.
12 *
13 * @dev We ship our own instance so the suite (and any chain without the canonical
14 * deployment) is self-contained. The address derivation is identical, so an account
15 * created here is byte-compatible with any ERC-6551 tooling.
16 */
17contract ERC6551Registry is IERC6551Registry {
18 function _creationCode(address implementation, bytes32 salt, uint256 chainId, address tokenContract, uint256 tokenId)
19 internal
20 pure
21 returns (bytes memory)
22 {
23 return abi.encodePacked(
24 hex"3d60ad80600a3d3981f3363d3d373d3d3d363d73",
25 implementation,
26 hex"5af43d82803e903d91602b57fd5bf3",
27 abi.encode(salt, chainId, tokenContract, tokenId)
28 );
29 }
30 
31 function createAccount(
32 address implementation,
33 bytes32 salt,
34 uint256 chainId,
35 address tokenContract,
36 uint256 tokenId
37 ) external returns (address) {
38 bytes memory code = _creationCode(implementation, salt, chainId, tokenContract, tokenId);
39 address predicted = Create2.computeAddress(salt, keccak256(code), address(this));
40 if (predicted.code.length != 0) return predicted;
41 
42 address deployed = Create2.deploy(0, salt, code);
43 if (deployed != predicted) revert AccountCreationFailed();
44 
45 emit ERC6551AccountCreated(deployed, implementation, salt, chainId, tokenContract, tokenId);
46 return deployed;
47 }
48 
49 function account(address implementation, bytes32 salt, uint256 chainId, address tokenContract, uint256 tokenId)
50 external
51 view
52 returns (address)
53 {
54 bytes memory code = _creationCode(implementation, salt, chainId, tokenContract, tokenId);
55 return Create2.computeAddress(salt, keccak256(code), address(this));
56 }
57}
58 

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