Micro Buyer Spending Policy Check

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/micro/buyer-spending-policy-check' \
  -H 'content-type: application/json' \
  --data-raw '{"allowedPayees":["0x1111111111111111111111111111111111111111"],"budgetBaseUnits":"100000","calls":[{"amountBaseUnits":"10000","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","humanApproved":true,"id":"call-1","network":"eip155:8453","payee":"0x1111111111111111111111111111111111111111"}],"dataClass":"synthetic","perCallCapBaseUnits":"50000","requireHumanApproval":true}'

# 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://www.mahastrategies.com/api/v1/micro/buyer-spending-policy-check' \
  -H 'content-type: application/json' \
  --data-raw '{"allowedPayees":["0x1111111111111111111111111111111111111111"],"budgetBaseUnits":"100000","calls":[{"amountBaseUnits":"10000","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","humanApproved":true,"id":"call-1","network":"eip155:8453","payee":"0x1111111111111111111111111111111111111111"}],"dataClass":"synthetic","perCallCapBaseUnits":"50000","requireHumanApproval":true}' \
  | 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 $0.035 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.035" });
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 $0.035 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fbuyer-spending-policy-check&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/buyer-spending-policy-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "allowedPayees": [
      "0x1111111111111111111111111111111111111111"
    ],
    "budgetBaseUnits": "100000",
    "calls": [
      {
        "amountBaseUnits": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "humanApproved": true,
        "id": "call-1",
        "network": "eip155:8453",
        "payee": "0x1111111111111111111111111111111111111111"
      }
    ],
    "dataClass": "synthetic",
    "perCallCapBaseUnits": "50000",
    "requireHumanApproval": true
  }),
});
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 $0.035 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.035"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.mahastrategies.com/api/v1/micro/buyer-spending-policy-check",
        json={
            "allowedPayees": [
                "0x1111111111111111111111111111111111111111",
            ],
            "budgetBaseUnits": "100000",
            "calls": [
                {
                    "amountBaseUnits": "10000",
                    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                    "humanApproved": True,
                    "id": "call-1",
                    "network": "eip155:8453",
                    "payee": "0x1111111111111111111111111111111111111111",
                },
            ],
            "dataClass": "synthetic",
            "perCallCapBaseUnits": "50000",
            "requireHumanApproval": True,
        },
    )
    print(res.status_code, res.text)