Security Kev Exact Change

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://foundry-api-production-95ae.up.railway.app/v1/security/kev-exact-change' \
  -H 'content-type: application/json' \
  --data-raw '{"client_request_id":"kev-change-example","query":{"from_raw_sha256":"f51fed1c9213e7b797104fcd6dbeb1b0dc0c7073a80467b9d4b1fc25e7dd786b","native_cve_id":"CVE-2022-0995","projection_version":"0.1.0","to_raw_sha256":"b6e27975f6635ecfc546fbd4fd6e444ba63a07ab2abc8876229d77fe083d357d"}}'

# 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://foundry-api-production-95ae.up.railway.app/v1/security/kev-exact-change' \
  -H 'content-type: application/json' \
  --data-raw '{"client_request_id":"kev-change-example","query":{"from_raw_sha256":"f51fed1c9213e7b797104fcd6dbeb1b0dc0c7073a80467b9d4b1fc25e7dd786b","native_cve_id":"CVE-2022-0995","projection_version":"0.1.0","to_raw_sha256":"b6e27975f6635ecfc546fbd4fd6e444ba63a07ab2abc8876229d77fe083d357d"}}' \
  | 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%2Ffoundry-api-production-95ae.up.railway.app%2Fv1%2Fsecurity%2Fkev-exact-change&method=POST
const res = await pay("https://foundry-api-production-95ae.up.railway.app/v1/security/kev-exact-change", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "client_request_id": "kev-change-example",
    "query": {
      "from_raw_sha256": "f51fed1c9213e7b797104fcd6dbeb1b0dc0c7073a80467b9d4b1fc25e7dd786b",
      "native_cve_id": "CVE-2022-0995",
      "projection_version": "0.1.0",
      "to_raw_sha256": "b6e27975f6635ecfc546fbd4fd6e444ba63a07ab2abc8876229d77fe083d357d"
    }
  }),
});
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://foundry-api-production-95ae.up.railway.app/v1/security/kev-exact-change",
        json={
            "client_request_id": "kev-change-example",
            "query": {
                "from_raw_sha256": "f51fed1c9213e7b797104fcd6dbeb1b0dc0c7073a80467b9d4b1fc25e7dd786b",
                "native_cve_id": "CVE-2022-0995",
                "projection_version": "0.1.0",
                "to_raw_sha256": "b6e27975f6635ecfc546fbd4fd6e444ba63a07ab2abc8876229d77fe083d357d",
            },
        },
    )
    print(res.status_code, res.text)