Citations Locator Conversion

{
  "data": {
    "chargedAmount": "24002",
    "inputHash": "sha256:f3b482e3206c27c1528abd63ae53f6266d4eb358cc3cfd89c12f81abe…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "citation-locator-conversion",
    "result": {
      "dataClass": "synthetic",
      "inputSha256": "sha256:f3b482e3206c27c1528abd63ae53f6266d4eb358cc3cfd89c12f81abe…",
      "limits": [
        "Public/synthetic is a caller declaration, not content inspection…"
      ],
      "locators": [
        {
          "codepointEnd": 3,
          "codepointStart": 1,
          "excerptSha256": "sha256:71b897d47640bd5e39412fb2d81c5d04b1195fc5524663a7704b6bfe2…",
          "locatorId": "l1",
          "sourceId": "s1",
          "utf16End": 4,
          "utf16Start": 1,
          "utf8End": 7,
          "utf8Start": 1
        }
      ],
      "offsetConvention": "zero-based-half-open",
      "resultSha256": "sha256:2cd724f8198f25ee297716e3646f5d9e7106e515b4ac31fdfa05e48be…",
      "sourcesVerified": false
    },
    "resultHash": "sha256:25d6f4bf2d4e42dade320264b3de76ef529b1e38f200ccce0e26ae299…",
    "sourceContractAmount": "24000",
    "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/library/citations/locator-conversion' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","locators":[{"end":7,"locatorId":"l1","sourceId":"s1","start":1,"unit":"utf8"}],"sources":[{"sourceId":"s1","text":"A\ud83d\ude00\u00e9Z"}]}'

# 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/library/citations/locator-conversion' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","locators":[{"end":7,"locatorId":"l1","sourceId":"s1","start":1,"unit":"utf8"}],"sources":[{"sourceId":"s1","text":"A\ud83d\ude00\u00e9Z"}]}' \
  | 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 $0.024002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.024002" });
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 $0.024002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Flibrary%2Fcitations%2Flocator-conversion&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/library/citations/locator-conversion", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "locators": [
      {
        "end": 7,
        "locatorId": "l1",
        "sourceId": "s1",
        "start": 1,
        "unit": "utf8"
      }
    ],
    "sources": [
      {
        "sourceId": "s1",
        "text": "A\ud83d\ude00\u00e9Z"
      }
    ]
  }),
});
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 $0.024002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.024002"})
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/library/citations/locator-conversion",
        json={
            "dataClass": "synthetic",
            "locators": [
                {
                    "end": 7,
                    "locatorId": "l1",
                    "sourceId": "s1",
                    "start": 1,
                    "unit": "utf8",
                },
            ],
            "sources": [
                {
                    "sourceId": "s1",
                    "text": "A\U0001f600\u00e9Z",
                },
            ],
        },
    )
    print(res.status_code, res.text)