| // SPDX-License-Identifier: MIT | |
| pragma solidity ^0.8.0; | |
| /// @dev the ERC-165 identifier for this interface is `0x6faff5f1` | |
| interface IERC6551Account { | |
| /** | |
| * @dev Allows the account to receive Ether. | |
| * | |
| * Accounts MUST implement a `receive` function. | |
| * | |
| * Accounts MAY perform arbitrary logic to restrict conditions | |
| * under which Ether can be received. | |
| */ | |
| receive() external payable; | |
| /** | |
| * @dev Returns the identifier of the non-fungible token which owns the account. | |
| * | |
| * The return value of this function MUST be constant - it MUST NOT change over time. | |
| * | |
| * @return chainId The EIP-155 ID of the chain the token exists on | |
| * @return tokenContract The contract address of the token | |
| * @return tokenId The ID of the token | |
| */ | |
| function token() | |
| external | |
| view | |
| returns (uint256 chainId, address tokenContract, uint256 tokenId); | |
| /** | |
| * @dev Returns a value that SHOULD be modified each time the account changes state. | |
| * | |
| * @return The current account state | |
| */ | |
| function state() external view returns (uint256); | |
| /** | |
| * @dev Returns a magic value indicating whether a given signer is authorized to act on behalf | |
| * of the account. | |
| * | |
| * MUST return the bytes4 magic value 0x523e3260 if the given signer is valid. | |
| * | |
| * By default, the holder of the non-fungible token the account is bound to MUST be considered | |
| * a valid signer. | |
| * | |
| * Accounts MAY implement additional authorization logic which invalidates the holder as a | |
| * signer or grants signing permissions to other non-holder accounts. | |
| * | |
| * @param signer The address to check signing authorization for | |
| * @param context Additional data used to determine whether the signer is valid | |
| * @return magicValue Magic value indicating whether the signer is valid | |
| */ | |
| function isValidSigner(address signer, bytes calldata context) | |
| external | |
| view | |
| returns (bytes4 magicValue); | |
| } | |