X402 Eth Reads V1 Eth Mainnet Contract Abi

{
  "chain": "base",
  "method": "abi",
  "ok": true,
  "result": {
    "abi": [
      {
        "inputs": [
          {
            "internalType": "address",
            "name": "implementationContract",
            "type": "address"
          }
        ],
        "stateMutability": "nonpayable",
        "type": "constructor"
      },
      {
        "anonymous": false,
        "inputs": [
          {
            "indexed": false,
            "internalType": "address",
            "name": "previousAdmin",
            "type": "address"
          },
          {
            "indexed": false,
            "internalType": "address",
            "name": "newAdmin",
            "type": "address"
          }
        ],
        "name": "AdminChanged",
        "type": "event"
      },
      ""
    ],
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "implementation": "0x2Ce6311ddAE708829bc0784C967b7d77D19FD779",
    "isProxy": true,
    "match": "exact_match",
    "proxy": {
      "implementations": [
        {
          "address": "0x2Ce6311ddAE708829bc0784C967b7d77D19FD779",
          "name": "FiatTokenV2_2"
        }
      ],
      "isProxy": true,
      "proxyType": "ZeppelinOSProxy"
    },
    "verified": true
  },
  "service": "x402_chain_reads_v1.base_contract_abi"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://ari001.tailb4ac3a.ts.net/v1/ventures/x402_eth_reads_v1/eth_mainnet_contract_abi?address=0xdAC17F958D2ee523a2206206994597C13D831ec7'

# 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://ari001.tailb4ac3a.ts.net/v1/ventures/x402_eth_reads_v1/eth_mainnet_contract_abi?address=0xdAC17F958D2ee523a2206206994597C13D831ec7' \
  | 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%2Fari001.tailb4ac3a.ts.net%2Fv1%2Fventures%2Fx402_eth_reads_v1%2Feth_mainnet_contract_abi
const res = await pay("https://ari001.tailb4ac3a.ts.net/v1/ventures/x402_eth_reads_v1/eth_mainnet_contract_abi?address=0xdAC17F958D2ee523a2206206994597C13D831ec7");
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://ari001.tailb4ac3a.ts.net/v1/ventures/x402_eth_reads_v1/eth_mainnet_contract_abi?address=0xdAC17F958D2ee523a2206206994597C13D831ec7")
    print(res.status_code, res.text)