import test from 'node:test';
import assert from 'node:assert/strict';

import { KeyPair } from 'near-api-js';

import { buildIntentNonce, buildQuoteResponseSubmission } from '../src/venues/near-intents/signing.mjs';

test('intent nonce uses verifier salt prefix and 32 byte base64 payload', () => {
  const nonce = buildIntentNonce('252812b3');
  const decoded = Buffer.from(nonce, 'base64');

  assert.equal(decoded.length, 32);
  assert.equal(decoded.subarray(0, 4).toString('hex'), '252812b3');
});

test('quote response signing builds token_diff payload for solver submission', () => {
  const signer = KeyPair.fromRandom('ed25519');
  const submission = buildQuoteResponseSubmission({
    command: {
      quote_id: 'quote-1',
      asset_in: 'nep141:btc.omft.near',
      asset_out: 'nep141:eure.omft.near',
      request_kind: 'exact_in',
      amount_in: '5000',
      amount_out: null,
      min_deadline_ms: '60000',
      quote_output: {
        amount_out: '4900000000000000000',
      },
    },
    signerAccountId: 'solver.near',
    signer,
    verifierContract: 'intents.near',
    currentSaltHex: '252812b3',
    now: Date.parse('2026-04-02T10:00:00.000Z'),
  });

  assert.equal(submission.quote_id, 'quote-1');
  assert.equal(submission.signed_data.standard, 'raw_ed25519');
  const payload = JSON.parse(submission.signed_data.payload);
  assert.equal(payload.signer_id, 'solver.near');
  assert.equal(payload.intents[0].diff['nep141:btc.omft.near'], '5000');
  assert.equal(payload.intents[0].diff['nep141:eure.omft.near'], '-4900000000000000000');
});