Vote Buying Detect

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://gov.halowerk.com/v1/vote-buying-detect' \
  -H 'content-type: application/json' \
  --data-raw '{"flag_threshold":0.7,"observations":[{"associated_transfer_amount":12,"choice":"for","repeated_counterparty_count":0,"transfer_age_hours":240,"voter_id":"voter-1"},{"associated_transfer_amount":10,"choice":"against","repeated_counterparty_count":1,"transfer_age_hours":180,"voter_id":"voter-2"},{"associated_transfer_amount":900,"choice":"for","repeated_counterparty_count":7,"transfer_age_hours":2,"voter_id":"voter-3"}]}'

# 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://gov.halowerk.com/v1/vote-buying-detect' \
  -H 'content-type: application/json' \
  --data-raw '{"flag_threshold":0.7,"observations":[{"associated_transfer_amount":12,"choice":"for","repeated_counterparty_count":0,"transfer_age_hours":240,"voter_id":"voter-1"},{"associated_transfer_amount":10,"choice":"against","repeated_counterparty_count":1,"transfer_age_hours":180,"voter_id":"voter-2"},{"associated_transfer_amount":900,"choice":"for","repeated_counterparty_count":7,"transfer_age_hours":2,"voter_id":"voter-3"}]}' \
  | 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 $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
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 $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fgov.halowerk.com%2Fv1%2Fvote-buying-detect&method=POST
const res = await pay("https://gov.halowerk.com/v1/vote-buying-detect", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "flag_threshold": 0.7,
    "observations": [
      {
        "associated_transfer_amount": 12,
        "choice": "for",
        "repeated_counterparty_count": 0,
        "transfer_age_hours": 240,
        "voter_id": "voter-1"
      },
      {
        "associated_transfer_amount": 10,
        "choice": "against",
        "repeated_counterparty_count": 1,
        "transfer_age_hours": 180,
        "voter_id": "voter-2"
      },
      {
        "associated_transfer_amount": 900,
        "choice": "for",
        "repeated_counterparty_count": 7,
        "transfer_age_hours": 2,
        "voter_id": "voter-3"
      }
    ]
  }),
});
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 $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://gov.halowerk.com/v1/vote-buying-detect",
        json={
            "flag_threshold": 0.7,
            "observations": [
                {
                    "associated_transfer_amount": 12,
                    "choice": "for",
                    "repeated_counterparty_count": 0,
                    "transfer_age_hours": 240,
                    "voter_id": "voter-1",
                },
                {
                    "associated_transfer_amount": 10,
                    "choice": "against",
                    "repeated_counterparty_count": 1,
                    "transfer_age_hours": 180,
                    "voter_id": "voter-2",
                },
                {
                    "associated_transfer_amount": 900,
                    "choice": "for",
                    "repeated_counterparty_count": 7,
                    "transfer_age_hours": 2,
                    "voter_id": "voter-3",
                },
            ],
        },
    )
    print(res.status_code, res.text)