Evm Abi Encode

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://chain-tools.use.x402atlas.com/evm/abi-encode' \
  -H 'content-type: application/json' \
  --data-raw '{"function":"transfer","include_selector":true,"types":["address","uint256"],"values":["0x0000000000000000000000000000000000000001","1000"]}'

# 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 - -X POST 'https://chain-tools.use.x402atlas.com/evm/abi-encode' \
  -H 'content-type: application/json' \
  --data-raw '{"function":"transfer","include_selector":true,"types":["address","uint256"],"values":["0x0000000000000000000000000000000000000001","1000"]}' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fchain-tools.use.x402atlas.com%2Fevm%2Fabi-encode&method=POST
const res = await pay("https://chain-tools.use.x402atlas.com/evm/abi-encode", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "function": "transfer",
    "include_selector": true,
    "types": [
      "address",
      "uint256"
    ],
    "values": [
      "0x0000000000000000000000000000000000000001",
      "1000"
    ]
  }),
});
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://chain-tools.use.x402atlas.com/evm/abi-encode",
        json={
            "function": "transfer",
            "include_selector": True,
            "types": [
                "address",
                "uint256",
            ],
            "values": [
                "0x0000000000000000000000000000000000000001",
                "1000",
            ],
        },
    )
    print(res.status_code, res.text)