Sign TRON Transactions

const unsignedResponse = await fetch(
  'https://api.trongrid.io/wallet/createtransaction',
  {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      owner_address: walletMetadata.accountAddress,
      to_address: 'RECIPIENT_TRON_ADDRESS',
      amount: 1_000_000, // 1 TRX in SUN
      visible: true,
    }),
  }
);

const unsignedTransaction = await unsignedResponse.json();
// unsignedTransaction.raw_data_hex is what gets signed

import { authenticatedTronClient } from './client';

const tronClient = await authenticatedTronClient();

// ✅ Simple signing - no externalServerKeyShares needed
const signedTransaction = await tronClient.signTransaction({
  walletMetadata,
  password: 'your-secure-password',
  transaction: unsignedTransaction,
});

console.log('Signed transaction (JSON):', signedTransaction);

// ⚠️ First, retrieve the key shares your app stored at wallet creation
// (required for manual backup). retrieveStoredKeyShares is a function
// you implement that reads the shares from your secrets vault.
const keyShares = await retrieveStoredKeyShares('YourTronWalletAddress');

const signedTransaction = await tronClient.signTransaction({
  walletMetadata,
  externalServerKeyShares: keyShares, // Required for manual backup!
  transaction: unsignedTransaction,
  password: 'your-password', // Only if wallet was created with password
});

const broadcastResponse = await fetch(
  'https://api.trongrid.io/wallet/broadcasttransaction',
  {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: signedTransaction,
  }
);

const result = await broadcastResponse.json();
console.log('Broadcast result:', result);