Chemistry Reaction Conservation

{
  "data": {
    "chargedAmount": "10049",
    "inputHash": "sha256:11b89509b3fc9adbf2511d88bc6df21a54192a322af2d5b67c9639ba8…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "chemistry-reaction-conservation",
    "result": {
      "findings": {
        "balanced": true,
        "chargeDelta": 0,
        "differences": [],
        "feasibilityEstablished": false
      },
      "limitations": [
        "Public or synthetic research inputs only; no patient, personal g…"
      ],
      "methodVersion": "maha-science50/1.0.0",
      "numericPrecision": "IEEE754-double; finite outputs rounded to 12 significant digits"
    },
    "resultHash": "sha256:2f02e6300dbd207d22fa89f0c7e9de8fcf9793afce89bcca485d0baa6…",
    "sourceContractAmount": "37001",
    "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/chemistry/reaction-conservation' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","products":[{"charge":0,"coefficient":2,"formula":"H2O"}],"reactants":[{"charge":0,"coefficient":2,"formula":"H2"},{"charge":0,"coefficient":1,"formula":"O2"}]}'

# 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/chemistry/reaction-conservation' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","products":[{"charge":0,"coefficient":2,"formula":"H2O"}],"reactants":[{"charge":0,"coefficient":2,"formula":"H2"},{"charge":0,"coefficient":1,"formula":"O2"}]}' \
  | 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 $0.010049 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.010049" });
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 $0.010049 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fcompute%2Fchemistry%2Freaction-conservation&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/compute/chemistry/reaction-conservation", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "products": [
      {
        "charge": 0,
        "coefficient": 2,
        "formula": "H2O"
      }
    ],
    "reactants": [
      {
        "charge": 0,
        "coefficient": 2,
        "formula": "H2"
      },
      {
        "charge": 0,
        "coefficient": 1,
        "formula": "O2"
      }
    ]
  }),
});
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 $0.010049 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.010049"})
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/chemistry/reaction-conservation",
        json={
            "dataClass": "synthetic",
            "products": [
                {
                    "charge": 0,
                    "coefficient": 2,
                    "formula": "H2O",
                },
            ],
            "reactants": [
                {
                    "charge": 0,
                    "coefficient": 2,
                    "formula": "H2",
                },
                {
                    "charge": 0,
                    "coefficient": 1,
                    "formula": "O2",
                },
            ],
        },
    )
    print(res.status_code, res.text)