onchain-patterns

What problem does it solve?

This Skill helps you avoid inconsistent or broken Web3 indexing and dApp state by teaching reliable on-chain data architecture that survives immutability and chain reorganizations.

Core Features & Use Cases

• Events-first indexing: treat emitted events as the canonical source of truth for deriving state and building reliable indexers.
• Reorg-aware design: implement confirmation thresholds, track block hashes, and design idempotent handlers to prevent corrupted off-chain data.
• Subgraph/indexer architecture: choose between The Graph, custom indexers, direct RPC reads, or third-party APIs with clear trade-offs and operational constraints.
• On-chain/off-chain bridging discipline: store CIDs on-chain correctly, pin content, and use secure off-chain signature patterns (e.g., EIP-712 with domain, nonce, expiry, and explicit action types).
• Composability and contract integration readiness: design contract interfaces and behaviors that work cleanly with other contracts and external callers.

Quick Start

Use the onchain-patterns skill to plan an event-driven indexer that derives state from logs while implementing a confirmation window and reorg rollback handling for your target chain.