Rechner Partial Target Size

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://handel.halowerk.com/v1/rechner/partial-target-size' \
  -H 'content-type: application/json' \
  --data-raw '{"contract_size":100,"equity":10000,"fractions":[0.5,0.5],"quote_to_account":1,"risk_pct":1,"signal":{"direction":1,"entry":100,"stop":90,"symbol":"XAU/USD","targets":[120,130]}}'

# 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://handel.halowerk.com/v1/rechner/partial-target-size' \
  -H 'content-type: application/json' \
  --data-raw '{"contract_size":100,"equity":10000,"fractions":[0.5,0.5],"quote_to_account":1,"risk_pct":1,"signal":{"direction":1,"entry":100,"stop":90,"symbol":"XAU/USD","targets":[120,130]}}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhandel.halowerk.com%2Fv1%2Frechner%2Fpartial-target-size&method=POST
const res = await pay("https://handel.halowerk.com/v1/rechner/partial-target-size", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "contract_size": 100,
    "equity": 10000,
    "fractions": [
      0.5,
      0.5
    ],
    "quote_to_account": 1,
    "risk_pct": 1,
    "signal": {
      "direction": 1,
      "entry": 100,
      "stop": 90,
      "symbol": "XAU/USD",
      "targets": [
        120,
        130
      ]
    }
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://handel.halowerk.com/v1/rechner/partial-target-size",
        json={
            "contract_size": 100,
            "equity": 10000,
            "fractions": [
                0.5,
                0.5,
            ],
            "quote_to_account": 1,
            "risk_pct": 1,
            "signal": {
                "direction": 1,
                "entry": 100,
                "stop": 90,
                "symbol": "XAU/USD",
                "targets": [
                    120,
                    130,
                ],
            },
        },
    )
    print(res.status_code, res.text)