#!/usr/bin/env node
/**
 * DBIS Rail — Canonicalization test vectors (Hash Canonicalization v1.5).
 * Computes lebHash, lpaId, isoHash from canonical JSON (UTF-8, sorted keys).
 * Run: node scripts/dbis/canonicalization-test-vectors.js
 * Requires: Node 18+ (no deps) or use ethers/viem for keccak256 if available.
 */

const crypto = require("crypto");

function keccak256Hex(data) {
  const buf = Buffer.isBuffer(data) ? data : Buffer.from(data, "utf8");
  const h = crypto.createHash("sha3-256").update(buf).digest("hex");
  return "0x" + h;
}

const LEB_CANONICAL = '{"batchNumber":1,"journalId":"J-2025-001","ledgerSystemId":"CORE","postingTimestamp":1740931200,"reserveAccountId":"RES-USD-001"}';
const LPA_CANONICAL = '{"lebHash":"0x0000000000000000000000000000000000000000000000000000000000000001","state":"POSTED_FINAL","stateTimestamp":1740931200}';
const ISO_CANONICAL = '{"amount":"1000.000000","currency":"USD","endToEndId":"E2E-2025-001","messageType":"pacs.008","timestamp":1740931200,"uetr":"550e8400-e29b-41d4-a716-446655440000"}';

const lebHash = keccak256Hex(LEB_CANONICAL);
const lpaId = keccak256Hex(LPA_CANONICAL);
const isoHash = keccak256Hex(ISO_CANONICAL);

console.log("LEB (canonical):", LEB_CANONICAL);
console.log("lebHash:", lebHash);
console.log("");
console.log("LPA (canonical):", LPA_CANONICAL);
console.log("lpaId:", lpaId);
console.log("");
console.log("ISO bundle (canonical):", ISO_CANONICAL);
console.log("isoHash:", isoHash);