Micro Spatial Adjacency Check

{
  "amountBaseUnits": "29500",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:cbaab14680d9db202add7d89befebc941459edff8a7fe68e1bb81c494…",
  "offerId": "spatial-adjacency-check",
  "receiptDigest": "sha256:07659d8af1311a6dc0d8f136acbbdcce9768d8c0872ad244f4826b51d…",
  "result": {
    "checks": [
      {
        "from": "studio",
        "id": "r1",
        "relation": "adjacent",
        "status": "satisfied",
        "to": "court"
      }
    ],
    "contradictoryPairs": [],
    "dataClass": "synthetic",
    "limitations": [
      "Only declared undirected room topology; absence is unknown, not …"
    ],
    "serviceId": "spatial-adjacency-check"
  },
  "version": "maha-microproducts/0.1"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/micro/spatial-adjacency-check' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","requirements":[{"from":"studio","id":"r1","relation":"adjacent","to":"court"}],"rooms":["studio","court"],"topology":[{"adjacent":true,"from":"studio","to":"court"}]}'

# 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/micro/spatial-adjacency-check' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","requirements":[{"from":"studio","id":"r1","relation":"adjacent","to":"court"}],"rooms":["studio","court"],"topology":[{"adjacent":true,"from":"studio","to":"court"}]}' \
  | 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 $0.0295 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0295" });
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 $0.0295 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fspatial-adjacency-check&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/spatial-adjacency-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "requirements": [
      {
        "from": "studio",
        "id": "r1",
        "relation": "adjacent",
        "to": "court"
      }
    ],
    "rooms": [
      "studio",
      "court"
    ],
    "topology": [
      {
        "adjacent": true,
        "from": "studio",
        "to": "court"
      }
    ]
  }),
});
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 $0.0295 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0295"})
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/micro/spatial-adjacency-check",
        json={
            "dataClass": "synthetic",
            "requirements": [
                {
                    "from": "studio",
                    "id": "r1",
                    "relation": "adjacent",
                    "to": "court",
                },
            ],
            "rooms": [
                "studio",
                "court",
            ],
            "topology": [
                {
                    "adjacent": True,
                    "from": "studio",
                    "to": "court",
                },
            ],
        },
    )
    print(res.status_code, res.text)