Bridge tokens

import { isBridgError } from '@kernlog/bridg-sdk';
import type { Hex } from 'viem';
import { account, bridg, signEvmStep } from './evm';

async function main() {
  // 1. Quote: 25 USDC on Base to USDC on Arbitrum
  const quote = await bridg.getQuote({
    fromChain: 'base',
    toChain: 'arbitrum',
    fromToken: 'USDC',
    toToken: 'USDC',
    amountAtomic: '25000000',
    sender: account.address,
    recipient: account.address,
  });
  if (!quote.best) throw new Error(`no executable route: ${quote.rejected.map((r) => r.code).join(', ')}`);
  console.log(`${quote.best.venue} delivers ${quote.best.amountOutAtomic} in ~${quote.best.estimatedSeconds}s`);

  // 2. Build the winner
  const build = await bridg.buildTransfer({ decisionId: quote.decisionId });

  // 3. Sign every step in order. Only `main` moves the order; the others are approvals and the fee.
  let mainHash: Hex | undefined;
  for (const step of build.steps) {
    const hash = await signEvmStep(step);
    if (step.step === 'main') mainHash = hash;
  }
  if (!mainHash) throw new Error('build carried no main step');

  // 4. Report the hash
  await bridg.submitTransfer(build.transferId, { txHash: mainHash, step: 'main' });

  // 5. Wait for delivery
  const transfer = await bridg.waitForTransfer(build.transferId, {
    onUpdate: (t) => console.log(t.status),
  });
  console.log(transfer.status, transfer.destinationTxHash);
}

main().catch((error) => {
  if (isBridgError(error)) console.error(error.code, error.message, error.details);
  else console.error(error);
  process.exit(1);
});