Chains Traces

{
  "data": {
    "blockNumber": 25000000,
    "frameCount": 1,
    "frames": [
      {
        "callPath": "0000",
        "callType": "call",
        "codeAddress": "0x681e908b8ab57c49c74d770f369754ccc3e1ae09",
        "depth": 1,
        "from": "0x9f59a6cc9538d4764cabde4ccaf6d02c8e8dddd6",
        "gas": "13496",
        "gasUsed": "11194",
        "inputSelector": "0x69f497f5",
        "order": 0,
        "revertDecodeStatus": "absent",
        "status": "success",
        "to": "0x681e908b8ab57c49c74d770f369754ccc3e1ae09",
        "valueWei": "0"
      }
    ],
    "framesTruncated": false,
    "hash": "0x0e646d1b52758cafe4eca236972927be572053491217fa08751d3958a1e30f0a",
    "txIndex": 0
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://mpp.tracefast.xyz/api/v1/chains/1/traces/:hash?limit=10'

# 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://mpp.tracefast.xyz/api/v1/chains/1/traces/:hash?limit=10' \
  | 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmpp.tracefast.xyz%2Fapi%2Fv1%2Fchains%2F1%2Ftraces%2F%3Ahash
const res = await pay("https://mpp.tracefast.xyz/api/v1/chains/1/traces/:hash?limit=10");
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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://mpp.tracefast.xyz/api/v1/chains/1/traces/:hash?limit=10")
    print(res.status_code, res.text)