Chain Observatory — V2 Analytics Indexer (W07)

A Ponder-based indexer turning raw pair logs into block-addressable reserve, volume, fee and holder views. Every snapshot anchors to a block hash with an explicit coverage and finality model; reorg recovery is tested, not assumed.

Web3IndexerData Infrastructure

Live Demo Source Code

Key Results

14 TypeScript + 8 fixture tests, including reorg recovery checks

Dual-testnet indexing (Ethereum Sepolia + Base Sepolia) with verified receipts

Guarded HTTP API: rate limiting, timeouts, validation

Finality states fail closed: finalized / pending / orphaned / unavailable

Tech Stack

TypeScriptPonderviemNext.jsPostgreSQL