Onesource · Chain Estimate GAS

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://api.onesource.io/api/chain/estimate-gas", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "data": "0x0",
    "to": "0xdac17f958d2ee523a2206206994597c13d831ec7"
  }),
});
const data = await res.json();

curl -X POST \
  "https://api.onesource.io/api/chain/estimate-gas" \
  -H "Content-Type: application/json" \
  -d '{"data":"0x0","to":"0xdac17f958d2ee523a2206206994597c13d831ec7"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "data": {
    "gas": "0x5208"
  },
  "meta": {
    "cost_usdc": "0.001",
    "endpoint": "/api/chain/estimate-gas",
    "payment_chain": "base",
    "payment_token": "USDC",
    "request_id": "00000000abcdef01"
  }
}