Analytics

import { type UsageStore, type UsageContext } from "@402guard/client";

export class PostgresUsageStore implements UsageStore {
  async recordUsage(ctx: UsageContext): Promise<void> {
    // Insert into your database
    await db.query(
      `INSERT INTO usage_logs (service_id, agent_id, usd_amount, tx_hash, created_at)
       VALUES ($1, $2, $3, $4, $5)`,
      [ctx.serviceId, ctx.agentId, ctx.usdAmount, ctx.x402.transaction, ctx.timestamp]
    );
  }
  
  // Implement other methods for budget tracking...
}

-- Total spend by subscription
SELECT subscription_id, SUM(usd_amount) as total_spend, COUNT(*) as requests
FROM usage_logs
GROUP BY subscription_id;

-- Total spend by agent
SELECT agent_id, SUM(usd_amount) as total_spend, COUNT(*) as requests
FROM usage_logs
GROUP BY agent_id;

import { createGuardedAxios } from "@402guard/client";
import { PostgresUsageStore } from "./your-store";

const guarded = createGuardedAxios({
  store: new PostgresUsageStore(), // Your DB-backed store
  policies: { 
    budgets: [
       { id: "monthly-limit", maxUsdCents: 5000, windowMs: 2592000000, scope: { subscriptionId: "pro-plan" } }
    ] 
  },
});

// Now every request is logged to your DB!