import {
  x402Client,
  ExactSvmScheme,
  ExactEvmScheme,
  createX402ProxyHandler,
  extractTxSignature,
  loadSvmWallet,
  loadEvmWallet,
} from "x402-proxy";

// 1. Configure the x402 client with payment schemes
const svmWallet = await loadSvmWallet("/path/to/keypair.json");
const client = x402Client([ExactSvmScheme(svmWallet)]);

// 2. Create the proxy handler
const { x402Fetch, shiftPayment } = createX402ProxyHandler({ client });

// 3. Make requests - payments are handled automatically
const response = await x402Fetch("https://api.example.com/paid-endpoint");
const payment = shiftPayment(); // { network, payTo, amount, asset }
const txSig = extractTxSignature(response);

import { appendHistory, readHistory, calcSpend, formatTxLine } from "x402-proxy";

// Append a transaction record
appendHistory("/path/to/history.jsonl", {
  t: Date.now(),
  ok: true,
  kind: "x402_inference",
  net: "solana:mainnet",
  from: "J5UH...",
  tx: "5abc...",
  amount: 0.05,
  token: "USDC",
  model: "claude-sonnet-4-20250514",
});

// Read and aggregate
const records = readHistory("/path/to/history.jsonl");
const { today, total, count } = calcSpend(records);