Verify on EVM

gateway DataUpdateResult       →  IVerifier.DataUpdate
  feedId, registryVersion,          feedId, registryVersion,
  signaturesRequired,              signaturesRequired,
  valuePacked, timestamp           value, canonicalTimestamp

                               →  IVerifier.SchnorrSignature
  s                                signature
  commitmentAddr                   commitment
  signersBitmap                    signersBitmap

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.31;

import {IVerifier} from "molpha-core-contracts/interfaces/IVerifier.sol";

contract MyConsumer {
    IVerifier public immutable verifier;
    uint256 public constant MAX_STALENESS = 60; // seconds

    constructor(address verifier_) {
        verifier = IVerifier(verifier_);
    }

    function settle(
        IVerifier.DataUpdate calldata update,
        IVerifier.SchnorrSignature calldata sig
    ) external {
        // 1. Cryptographic verification — MUST check the return value.
        require(verifier.verify(update, sig), "Molpha: invalid signature");

        // 2. Freshness — the verifier does not enforce staleness; the consumer does.
        require(
            block.timestamp - update.canonicalTimestamp <= MAX_STALENESS,
            "Molpha: stale data"
        );

        // 3. Application logic using the verified value.
        _useValue(update.value);
    }

    function _useValue(bytes32 value) internal { /* ... */ }
}