Micro Policy Version Comparison

{
  "amountBaseUnits": "17000",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:7b79acb2a65dfb30f4c116e2c4e5b4d132e30dbeb6c0205acffe42c57…",
  "offerId": "policy-version-comparison",
  "receiptDigest": "sha256:d30406e9a7aec34b69314254146b7865961e2d935684e8b9c1a1a9179…",
  "result": {
    "added": [],
    "afterDigest": "sha256:104dd5865b0149480461aa21a51f2edfa4ba0d51c60aad999496b0fa4…",
    "beforeDigest": "sha256:2b44232263e7fe7e523c334678c39988458d71e04c3b82c3f6d1743df…",
    "changed": [
      {
        "clauseId": "retain",
        "fields": [
          "text"
        ]
      }
    ],
    "legalEffectDetermined": false,
    "policyId": "example-policy",
    "removed": []
  },
  "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/policy-version-comparison' \
  -H 'content-type: application/json' \
  --data-raw '{"after":[{"clauseId":"retain","scope":"sandbox","text":"Retain for three days."}],"afterSequence":2,"afterVersion":"v2","before":[{"clauseId":"retain","scope":"sandbox","text":"Retain for seven days."}],"beforeSequence":1,"beforeVersion":"v1","dataClass":"synthetic","policyId":"example-policy"}'

# 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/policy-version-comparison' \
  -H 'content-type: application/json' \
  --data-raw '{"after":[{"clauseId":"retain","scope":"sandbox","text":"Retain for three days."}],"afterSequence":2,"afterVersion":"v2","before":[{"clauseId":"retain","scope":"sandbox","text":"Retain for seven days."}],"beforeSequence":1,"beforeVersion":"v1","dataClass":"synthetic","policyId":"example-policy"}' \
  | 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 $0.017 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.017" });
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 $0.017 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fpolicy-version-comparison&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/policy-version-comparison", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "after": [
      {
        "clauseId": "retain",
        "scope": "sandbox",
        "text": "Retain for three days."
      }
    ],
    "afterSequence": 2,
    "afterVersion": "v2",
    "before": [
      {
        "clauseId": "retain",
        "scope": "sandbox",
        "text": "Retain for seven days."
      }
    ],
    "beforeSequence": 1,
    "beforeVersion": "v1",
    "dataClass": "synthetic",
    "policyId": "example-policy"
  }),
});
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 $0.017 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.017"})
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/policy-version-comparison",
        json={
            "after": [
                {
                    "clauseId": "retain",
                    "scope": "sandbox",
                    "text": "Retain for three days.",
                },
            ],
            "afterSequence": 2,
            "afterVersion": "v2",
            "before": [
                {
                    "clauseId": "retain",
                    "scope": "sandbox",
                    "text": "Retain for seven days.",
                },
            ],
            "beforeSequence": 1,
            "beforeVersion": "v1",
            "dataClass": "synthetic",
            "policyId": "example-policy",
        },
    )
    print(res.status_code, res.text)