Regulatory Check

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://gov.halowerk.com/v1/regulatory-check' \
  -H 'content-type: application/json' \
  --data-raw '{"facts":[{"field":"reserve_ratio","value":1.15},{"field":"jurisdiction","value":"DE"},{"field":"disclosure","value":"Monthly treasury disclosure published"}],"rules":[{"expected":1,"field":"reserve_ratio","operator":"gte","rule_id":"reserve-minimum"},{"allowed_values":["DE","FR","NL"],"field":"jurisdiction","operator":"in","rule_id":"jurisdiction-list"},{"expected":"published","field":"disclosure","operator":"contains","rule_id":"disclosure-text"}]}'

# 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/regulatory-check' \
  -H 'content-type: application/json' \
  --data-raw '{"facts":[{"field":"reserve_ratio","value":1.15},{"field":"jurisdiction","value":"DE"},{"field":"disclosure","value":"Monthly treasury disclosure published"}],"rules":[{"expected":1,"field":"reserve_ratio","operator":"gte","rule_id":"reserve-minimum"},{"allowed_values":["DE","FR","NL"],"field":"jurisdiction","operator":"in","rule_id":"jurisdiction-list"},{"expected":"published","field":"disclosure","operator":"contains","rule_id":"disclosure-text"}]}' \
  | 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%2Fregulatory-check&method=POST
const res = await pay("https://gov.halowerk.com/v1/regulatory-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "facts": [
      {
        "field": "reserve_ratio",
        "value": 1.15
      },
      {
        "field": "jurisdiction",
        "value": "DE"
      },
      {
        "field": "disclosure",
        "value": "Monthly treasury disclosure published"
      }
    ],
    "rules": [
      {
        "expected": 1,
        "field": "reserve_ratio",
        "operator": "gte",
        "rule_id": "reserve-minimum"
      },
      {
        "allowed_values": [
          "DE",
          "FR",
          "NL"
        ],
        "field": "jurisdiction",
        "operator": "in",
        "rule_id": "jurisdiction-list"
      },
      {
        "expected": "published",
        "field": "disclosure",
        "operator": "contains",
        "rule_id": "disclosure-text"
      }
    ]
  }),
});
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/regulatory-check",
        json={
            "facts": [
                {
                    "field": "reserve_ratio",
                    "value": 1.15,
                },
                {
                    "field": "jurisdiction",
                    "value": "DE",
                },
                {
                    "field": "disclosure",
                    "value": "Monthly treasury disclosure published",
                },
            ],
            "rules": [
                {
                    "expected": 1,
                    "field": "reserve_ratio",
                    "operator": "gte",
                    "rule_id": "reserve-minimum",
                },
                {
                    "allowed_values": [
                        "DE",
                        "FR",
                        "NL",
                    ],
                    "field": "jurisdiction",
                    "operator": "in",
                    "rule_id": "jurisdiction-list",
                },
                {
                    "expected": "published",
                    "field": "disclosure",
                    "operator": "contains",
                    "rule_id": "disclosure-text",
                },
            ],
        },
    )
    print(res.status_code, res.text)