Numerics Polynomial Root

{
  "data": {
    "chargedAmount": "10007",
    "inputHash": "sha256:9c7a77d17f180516b1a50bfa14c2a07c341c7998bb5f9e0e27acb6134…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "bracketed-polynomial-root",
    "result": {
      "bracket": {
        "lower": {
          "denominator": "524288",
          "numerator": "741455"
        },
        "upper": {
          "denominator": "1048576",
          "numerator": "1482911"
        }
      },
      "iterations": 20,
      "method": "rational-polynomial-bisection",
      "state": "tolerance-reached",
      "uniquenessEstablished": false
    },
    "resultHash": "sha256:6c05e97d239560e6754510a5951814f4d0b9ddc4ac8103a1affba6fc8…",
    "sourceContractAmount": "9000",
    "version": "maha-legacy-adapter/1"
  },
  "proof": {
    "settlement_id": "0x00000000000000000000000000000000000000000000000000000000000000…"
  },
  "success": true
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/compute/numerics/polynomial-root' \
  -H 'content-type: application/json' \
  --data-raw '{"coefficientsAscending":["-2","0","1"],"dataClass":"synthetic","lower":"1","maxIterations":32,"tolerance":"0.000001","upper":"2"}'

# 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/compute/numerics/polynomial-root' \
  -H 'content-type: application/json' \
  --data-raw '{"coefficientsAscending":["-2","0","1"],"dataClass":"synthetic","lower":"1","maxIterations":32,"tolerance":"0.000001","upper":"2"}' \
  | 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 $0.010007 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.010007" });
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 $0.010007 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fcompute%2Fnumerics%2Fpolynomial-root&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/compute/numerics/polynomial-root", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "coefficientsAscending": [
      "-2",
      "0",
      "1"
    ],
    "dataClass": "synthetic",
    "lower": "1",
    "maxIterations": 32,
    "tolerance": "0.000001",
    "upper": "2"
  }),
});
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 $0.010007 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.010007"})
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/compute/numerics/polynomial-root",
        json={
            "coefficientsAscending": [
                "-2",
                "0",
                "1",
            ],
            "dataClass": "synthetic",
            "lower": "1",
            "maxIterations": 32,
            "tolerance": "0.000001",
            "upper": "2",
        },
    )
    print(res.status_code, res.text)