Bankr x402 SDK - Wallet Operations

SDK Wallet Operations

Initialize and configure the BankrClient with proper wallet setup.

Two-Wallet System

Wallet	Purpose	Required
Payment (privateKey)	Signs x402 micropayments ($0.01/request)	Yes
Context (walletAddress)	Receives swapped tokens, NFTs	No (defaults to payment wallet)

Basic Setup

import { BankrClient } from "@bankr/sdk";

const client = new BankrClient({
  privateKey: process.env.BANKR_PRIVATE_KEY as `0x${string}`,
});

const result = await client.promptAndWait({
  prompt: "What are my balances?",
});

Separate Wallets (Recommended)

For enhanced security, use different wallets for payments and receiving:

const client = new BankrClient({
  // Hot wallet with minimal USDC for payments
  privateKey: process.env.PAYMENT_WALLET_PK as `0x${string}`,
  // Cold/trading wallet receives tokens
  walletAddress: process.env.RECEIVING_WALLET,
});

Configuration Options

Option	Type	Required	Description
privateKey	0x${string}	Yes	Payment wallet private key
walletAddress	string	No	Override receiving wallet
baseUrl	string	No	API endpoint (default: production)
timeout	number	No	Request timeout ms (default: 600000)

SDK Methods

Method	Description
promptAndWait()	Submit prompt and wait for result
prompt()	Submit prompt, return immediately
pollJob()	Poll until job completes
getJobStatus()	Check job status once
cancelJob()	Cancel pending/processing job
getWalletAddress()	Get context wallet address

Per-Request Override

// Override wallet for a single request
const result = await client.promptAndWait({
  prompt: "Swap 0.1 ETH to USDC",
  walletAddress: "0xDifferentWallet...",
});

Environment Setup

# Required
BANKR_PRIVATE_KEY=0x...your_payment_wallet_key...

# Optional
BANKR_WALLET_ADDRESS=0x...your_receiving_wallet...

Security Best Practices

1. Never commit private keys - Use environment variables
2. Minimize payment wallet balance - Keep only $1-2 USDC
3. Use separate wallets - Payment (hot) vs receiving (cold)
4. Rotate keys periodically - If payment wallet compromised

Related Skills

• sdk-capabilities: Full list of supported operations
• sdk-job-management: Async job handling and polling