viem/_esm/actions/public/verifyHash.js

TypeScript Interface for Ethereum

import { universalSignatureValidatorAbi } from '../../constants/abis.js';
import { universalSignatureValidatorByteCode } from '../../constants/contracts.js';
import { CallExecutionError } from '../../errors/contract.js';
import { isBytesEqual, } from '../../utils/data/isBytesEqual.js';
import { getAction } from '../../utils/getAction.js';
import { encodeDeployData, isHex, toHex } from '../../utils/index.js';
import { call } from './call.js';
/**
 * Verifies a message hash on chain using ERC-6492.
 *
 * @param client - Client to use.
 * @param parameters - {@link VerifyHashParameters}
 * @returns Whether or not the signature is valid. {@link VerifyHashReturnType}
 */
export async function verifyHash(client, { address, hash, signature, ...callRequest }) {
    const signatureHex = isHex(signature) ? signature : toHex(signature);
    try {
        const { data } = await getAction(client, call, 'call')({
            data: encodeDeployData({
                abi: universalSignatureValidatorAbi,
                args: [address, hash, signatureHex],
                bytecode: universalSignatureValidatorByteCode,
            }),
            ...callRequest,
        });
        return isBytesEqual(data ?? '0x0', '0x1');
    }
    catch (error) {
        if (error instanceof CallExecutionError) {
            // if the execution fails, the signature was not valid and an internal method inside of the validator reverted
            // this can happen for many reasons, for example if signer can not be recovered from the signature
            // or if the signature has no valid format
            return false;
        }
        throw error;
    }
}
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