zponder

Production-grade EVM event indexer written in Zig. Index any smart contract on any EVM-compatible chain. Ships with REST API, GraphQL API, and built-in Playground.

npm install -g zponder

Quick Start

# Interactive setup wizard
zponder init

# Start indexing
zponder -c config.toml

Features

• High Performance — native binary, zero runtime dependencies, < 3MB
• Multi-chain — Ethereum, BSC, Polygon, and any EVM chain
• Multi-storage — SQLite, RocksDB, or PostgreSQL
• REST API — paginated event queries, Prometheus metrics, health checks
• GraphQL API — full schema with contracts, events, sync state, eth_call
• GraphQL Playground — built-in zero-dependency IDE
• Factory Contracts — auto-discover and index child contracts
• Rate Limiting — token-bucket for both REST and GraphQL
• Reorg Detection — automatic fork detection and rollback

Platforms

Pre-built binaries for:

| OS | Arch | Status | |----|------|--------| | macOS | arm64 (Apple Silicon) | Included | | macOS | x64 (Intel) | Build from source | | Linux | x64 | Build from source | | Linux | arm64 | Build from source |

Build from Source

git clone https://github.com/chy3xyz/zponder.git
cd zponder
zig build -Doptimize=ReleaseFast
./zig-out/bin/zponder -c config.toml

Requirements: Zig 0.16.0+, sqlite3, rocksdb (optional), libpq (optional for PostgreSQL)

Documentation

• README
• API Reference
• Architecture