Datasets Schema Evolution

{
  "data": {
    "inputHash": "sha256:69d74e38ac36abfcbc0a1791e309d5bdc582069ea77562af4b60b4ef8…",
    "limitations": [
      "Schema and integrity checks do not certify scientific truth, com…"
    ],
    "productId": "dataset-schema-evolution-plan",
    "receiptDigest": "sha256:89f464fce8dd2b7c52eff1004eba74848bdf5ea8c95082d19c7fa7c08…",
    "result": {
      "changes": [
        {
          "breaksDeclaredOldRecords": false,
          "field": "x",
          "kind": "type_changed"
        }
      ],
      "declaredCompatibility": "no_declared_break",
      "direction": "new_schema_accepts_records_per_old_declaration",
      "recordsExecutedAgainstSchema": false,
      "semanticEquivalenceProved": false
    },
    "resultHash": "sha256:f3d47c02b1bada2a560f81065574bb8c571af3647a598488141ccbc7f…",
    "version": "maha-workflow/1.0.0"
  },
  "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/verify/datasets/schema-evolution' \
  -H 'content-type: application/json' \
  --data-raw '{"after":[{"name":"x","nullable":true,"required":false,"type":"number","unit":"m"}],"before":[{"name":"x","nullable":true,"required":false,"type":"integer","unit":"m"}],"dataClass":"synthetic","rejectExtraFields":true}'

# 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/verify/datasets/schema-evolution' \
  -H 'content-type: application/json' \
  --data-raw '{"after":[{"name":"x","nullable":true,"required":false,"type":"number","unit":"m"}],"before":[{"name":"x","nullable":true,"required":false,"type":"integer","unit":"m"}],"dataClass":"synthetic","rejectExtraFields":true}' \
  | 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 $0.010064 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.010064" });
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 $0.010064 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fverify%2Fdatasets%2Fschema-evolution&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/verify/datasets/schema-evolution", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "after": [
      {
        "name": "x",
        "nullable": true,
        "required": false,
        "type": "number",
        "unit": "m"
      }
    ],
    "before": [
      {
        "name": "x",
        "nullable": true,
        "required": false,
        "type": "integer",
        "unit": "m"
      }
    ],
    "dataClass": "synthetic",
    "rejectExtraFields": true
  }),
});
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 $0.010064 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.010064"})
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/verify/datasets/schema-evolution",
        json={
            "after": [
                {
                    "name": "x",
                    "nullable": True,
                    "required": False,
                    "type": "number",
                    "unit": "m",
                },
            ],
            "before": [
                {
                    "name": "x",
                    "nullable": True,
                    "required": False,
                    "type": "integer",
                    "unit": "m",
                },
            ],
            "dataClass": "synthetic",
            "rejectExtraFields": True,
        },
    )
    print(res.status_code, res.text)