harb/services/ponder

KRAIKEN Ponder Indexer

A high-performance blockchain indexer for the KRAIKEN protocol using Ponder framework, providing 10-15x faster indexing than The Graph with superior developer experience.

Features

• ✅ Multi-network support: Local (Anvil fork), Base Sepolia, Base mainnet
• ✅ Hot reload: Instant updates during development
• ✅ Type safety: Full TypeScript support with auto-completion
• ✅ Ring buffer: 7-day hourly metrics with projections
• ✅ GraphQL API: Auto-generated from schema
• ✅ Efficient indexing: In-memory operations during sync

Quick Start

1. Install Dependencies

npm install

2. Configure Environment

cp .env.example .env

Edit .env to select your network:

• PONDER_NETWORK=BASE_SEPOLIA_LOCAL_FORK - Local Anvil fork managed by scripts/dev.sh
• PONDER_NETWORK=BASE_SEPOLIA - Base Sepolia testnet
• PONDER_NETWORK=BASE - Base mainnet

3. Local Development (Anvil Fork)

# Terminal 1: Start Anvil fork of Base mainnet
anvil --fork-url https://base.llamarpc.com

# Terminal 2: Start Ponder indexer
PONDER_NETWORK=BASE_SEPOLIA_LOCAL_FORK npm run dev

4. Testnet Deployment (Base Sepolia)

PONDER_NETWORK=BASE_SEPOLIA npm run dev

5. Production Deployment (Base Mainnet)

PONDER_NETWORK=BASE npm run start

GraphQL Queries

Once running, access the GraphQL playground at http://localhost:42069/graphql

Example Queries

Get Protocol Stats

{
  stats(id: "0x01") {
    kraikenTotalSupply
    stakeTotalSupply
    outstandingStake
    mintedLastWeek
    mintedLastDay
    mintNextHourProjected
    burnedLastWeek
    burnedLastDay
    burnNextHourProjected
  }
}

Get All Positions

{
  positions(where: { status: "Active" }) {
    items {
      id
      owner
      share
      taxRate
      kraikenDeposit
      taxPaid
      createdAt
    }
  }
}

Get User Positions

{
  positions(where: { owner: "0x..." }) {
    items {
      id
      share
      taxRate
      kraikenDeposit
      stakeDeposit
      taxPaid
      status
    }
  }
}

Architecture

Schema (ponder.schema.ts)

• stats: Global protocol metrics with ring buffer
• hourlyData: 168-hour circular buffer for time-series
• positions: Harberger tax staking positions

Event Handlers

• kraiken.ts: Handles Transfer events for minting, burning, tax, UBI
• stake.ts: Handles position lifecycle events

Ring Buffer Implementation

• 168 hourly slots (7 days)
• Automatic hourly rollover
• Projection calculation using median smoothing
• Rolling 24h and 7d aggregations

Deployment

Self-Hosted

DATABASE_URL=postgresql://... PONDER_NETWORK=BASE npm run start

Troubleshooting

• "No chain configured": Ensure PONDER_NETWORK is set in .env
• Slow initial sync: Provide a faster RPC URL
• Database errors: Use PostgreSQL for production (DATABASE_URL env var)

License

GPL-3.0-or-later