State Fingerprint Computer

1. Summary

IStateFingerpringComputer.sol defines interface each State Fingerprint Computer contract has to implement. State Fingerprint Computers allow usage of dynamic assets in the PWN Protocol that don't implement ERC-5646 natively.

2. Important links

pwn_contracts/src/interfaces/IStateFingerpringComputer.sol at master · PWNFinance/pwn_contractsGitHub

3. Implementation

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.16;

/**
 * @title IStateFingerpringComputer
 * @notice State Fingerprint Computer Interface.
 * @dev Contract can compute state fingerprint of several tokens as long as they share the same state structure.
 */
interface IStateFingerpringComputer {

    /**
     * @notice Compute current token state fingerprint for a given token.
     * @param token Address of a token contract.
     * @param tokenId Token id to compute state fingerprint for.
     * @return Current token state fingerprint.
     */
    function computeStateFingerprint(address token, uint256 tokenId) external view returns (bytes32);

    /**
     * @notice Check if the computer supports a given token address.
     * @param token Address of a token contract.
     * @return True if the computer supports the token address, false otherwise.
     */
    function supportsToken(address token) external view returns (bool);

}