Server Wallet Quickstart

import { ServerSignerClient } from '@abstraxn/server-signer';

const client = new ServerSignerClient({
  apiKey: process.env.ABSTRAXN_API_KEY!,
});

const session = await client.authenticate({
  userIdentity: 'merchant-backend-user-001', // same string every time — set once at creation
  userName: 'Merchant Backend',
  userEmail: 'backend@example.com',
});

console.log(session.didCreate);       // true on first run, false on subsequent calls
console.log(session.accessToken);     // JWT access token
console.log(session.accessKey);       // 64-char hex key — persist this securely!
console.log(session.targetPublicKey); // derived public key

const me = await client.whoami();
console.log(me);
// { userId: '...', organizationId: '...', walletAddress: '0x...' }

const publicClient = client.createPublicClient({
  rpcUrl: process.env.RPC_URL!,
  chainId: 137,                   // Polygon mainnet
  organizationId: session.organizationId,
  fromAddress: session.walletAddress,
});

// Prepare the transaction (adds nonce, chain ID, gas fields)
const prepared = await publicClient.prepareTransaction({
  to: '0x1111111111111111111111111111111111111111',
  value: 1_000_000_000_000_000n,  // 0.001 MATIC
});

// Sign and broadcast in one step
const txHash = await publicClient.signAndSendPreparedTransaction(
  prepared.unsignedTransaction,
);

// Wait for on-chain confirmation
const receipt = await publicClient.waitForTransactionReceipt(txHash);
console.log('Confirmed in block:', receipt.blockNumber);