23 lines
898 B
JavaScript
23 lines
898 B
JavaScript
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#!/usr/bin/env node
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/**
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* Preview digest for off-chain attestation signing (fiat / XAU custodian flow).
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* Uses keccak256(abi.encode(lineId, R, nonce, validUntil, evidenceKind)) — align with ops before HSM.
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* Usage: node omnl-attestation-payload.mjs <lineId0x> <R> <nonce> <validUntil> <evidenceKind>
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*/
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import { keccak256, AbiCoder } from 'ethers';
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const [, , lineId, R, nonce, validUntil, evidenceKind] = process.argv;
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if (!evidenceKind) {
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console.error(
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'Usage: omnl-attestation-payload.mjs <lineId0x> <R> <nonce> <validUntil> <evidenceKind>'
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);
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process.exit(1);
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}
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const coder = AbiCoder.defaultAbiCoder();
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const encoded = coder.encode(
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['bytes32', 'uint256', 'uint256', 'uint256', 'string'],
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[lineId, BigInt(R), BigInt(nonce), BigInt(validUntil), evidenceKind]
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);
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const digest = keccak256(encoded);
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process.stdout.write(JSON.stringify({ digest, encoded }, null, 2) + '\n');
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