Indexing Solana Programs in Rust: Notes From a Python Backend Engineer
A Python backend engineer shares insights from building a Solana program activity indexer in Rust, highlighting design choices around incremental sync, idempotent data ingestion, and testable abstractions. The project serves as a bridge to explore Rust and Web3 infrastructure while applying reliable engineering patterns from Python systems. The indexer fetches and stores Solana transaction data in Postgres with resilience and consistency.
- ▪The indexer polls Solana's JSON-RPC for new transaction signatures and stores normalized metadata along with raw JSON in Postgres.
- ▪It uses cursor-based sync with a safety guard to prevent out-of-order cursor updates, ensuring reliable incremental processing.
- ▪Data ingestion is idempotent using upserts, and the RPC client is abstracted behind a mockable trait for testability.
- ▪The system isolates ingestion errors to individual transactions, allowing batch processing to continue despite failures.
- ▪A minimal Axum HTTP API and static dashboard provide visibility into indexed programs and transactions.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 65073) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Brian Ting Posted on May 17 Indexing Solana Programs in Rust: Notes From a Python Backend Engineer #rust #postgres #solana #cryptocurrency TL;DR I built a small Solana program activity indexer in Rust to pressure-test the patterns I rely on every day in Python — cursor-based syncs, idempotent ingestion, mockable I/O — against an unfamiliar language and an unfamiliar chain. The repo is here: https://github.com/tyu1996/SPAI.
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