Tx Decode

{
  "decoded_args": [
    {
      "name": "from",
      "type": "address",
      "value": "0x8872...3F9b"
    },
    {
      "name": "to",
      "type": "address",
      "value": "0xc2a3...4083"
    },
    {
      "formatted": "0.002 USDC",
      "name": "value",
      "type": "uint256",
      "value": "2000"
    }
  ],
  "explorer": "https://basescan.org/tx/0x06be...095f",
  "hash": "0x06be...095f",
  "interpretation": "USDC transferWithAuthorization of 0.002 USDC (x402 settlement)",
  "is_x402_settlement": true,
  "method": {
    "name": "transferWithAuthorization",
    "selector": "0xe3ee160e",
    "source": "known"
  },
  "network": "base",
  "to": "0x8335...2913"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://quartermaster.surewhynot.app/v1/tx-decode?hash=0x06be01596be1cb68d9b12a33946d2228a82eeb31016ab237825cec547017095f'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://quartermaster.surewhynot.app/v1/tx-decode?hash=0x06be01596be1cb68d9b12a33946d2228a82eeb31016ab237825cec547017095f' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fquartermaster.surewhynot.app%2Fv1%2Ftx-decode
const res = await pay("https://quartermaster.surewhynot.app/v1/tx-decode?hash=0x06be01596be1cb68d9b12a33946d2228a82eeb31016ab237825cec547017095f");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://quartermaster.surewhynot.app/v1/tx-decode?hash=0x06be01596be1cb68d9b12a33946d2228a82eeb31016ab237825cec547017095f")
    print(res.status_code, res.text)