Evidence Coverage Drift

{
  "data": {
    "chargedAmount": "44501",
    "inputHash": "sha256:78b1d600b12cfec6255760f8fc04a226f1c19eaedbf820efc0e49f156…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "source-coverage-drift",
    "result": {
      "afterCoverageBps": 5000,
      "beforeCoverageBps": 5000,
      "changedRecordCount": 1,
      "coverageDeltaBps": 0,
      "dataClass": "synthetic",
      "gainedSourceIds": [
        "s2"
      ],
      "inputSha256": "sha256:78b1d600b12cfec6255760f8fc04a226f1c19eaedbf820efc0e49f156…",
      "limits": [
        "Public/synthetic is a caller declaration, not content inspection…"
      ],
      "lostSourceIds": [
        "s1"
      ],
      "records": [
        {
          "gainedSourceIds": [
            "s2"
          ],
          "lostSourceIds": [
            "s1"
          ],
          "recordId": "r1"
        }
      ],
      "resultSha256": "sha256:52cfb1e5f2a952a9891af58ef2311d43d04b4984443939ea14ef173dd…",
      "sources": [
        {
          "afterRecordCount": 0,
          "beforeRecordCount": 1,
          "delta": -1,
          "sourceId": "s1"
        }
      ],
      "sourcesVerified": false
    },
    "resultHash": "sha256:db1f3f48f5e0cd9065fd0517351ee9662d0446fbdac52354a67becb43…",
    "sourceContractAmount": "44500",
    "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/context/evidence/coverage-drift' \
  -H 'content-type: application/json' \
  --data-raw '{"after":{"records":[{"recordId":"r1","sourceIds":["s2"]}],"snapshotId":"v2"},"before":{"records":[{"recordId":"r1","sourceIds":["s1"]}],"snapshotId":"v1"},"dataClass":"synthetic","recordIds":["r1"],"sourceIds":["s1","s2"]}'

# 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/context/evidence/coverage-drift' \
  -H 'content-type: application/json' \
  --data-raw '{"after":{"records":[{"recordId":"r1","sourceIds":["s2"]}],"snapshotId":"v2"},"before":{"records":[{"recordId":"r1","sourceIds":["s1"]}],"snapshotId":"v1"},"dataClass":"synthetic","recordIds":["r1"],"sourceIds":["s1","s2"]}' \
  | 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 $0.044501 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.044501" });
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 $0.044501 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fcontext%2Fevidence%2Fcoverage-drift&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/context/evidence/coverage-drift", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "after": {
      "records": [
        {
          "recordId": "r1",
          "sourceIds": [
            "s2"
          ]
        }
      ],
      "snapshotId": "v2"
    },
    "before": {
      "records": [
        {
          "recordId": "r1",
          "sourceIds": [
            "s1"
          ]
        }
      ],
      "snapshotId": "v1"
    },
    "dataClass": "synthetic",
    "recordIds": [
      "r1"
    ],
    "sourceIds": [
      "s1",
      "s2"
    ]
  }),
});
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 $0.044501 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.044501"})
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/context/evidence/coverage-drift",
        json={
            "after": {
                "records": [
                    {
                        "recordId": "r1",
                        "sourceIds": [
                            "s2",
                        ],
                    },
                ],
                "snapshotId": "v2",
            },
            "before": {
                "records": [
                    {
                        "recordId": "r1",
                        "sourceIds": [
                            "s1",
                        ],
                    },
                ],
                "snapshotId": "v1",
            },
            "dataClass": "synthetic",
            "recordIds": [
                "r1",
            ],
            "sourceIds": [
                "s1",
                "s2",
            ],
        },
    )
    print(res.status_code, res.text)