indexing

Query onchain events and historical states using The Graph subgraphs.

Updated Feb 28, 2026
One-click install
npx skills add https://github.com/freeslugs/unlink-hackathon --skill indexing-freeslugs
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: indexing
Source: https://github.com/freeslugs/unlink-hackathon/tree/main/_skills/eth-skills/indexing
Command: npx skills add https://github.com/freeslugs/unlink-hackathon --skill indexing-freeslugs

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses the common challenges of efficiently querying and understanding historical blockchain data, moving beyond inefficient RPC calls and block scanning.

Core Features & Use Cases

  • Onchain Data Access: Learn to read and query historical blockchain data effectively.
  • Indexing Strategies: Understand why direct RPC calls and block loops fail for historical data and discover robust indexing solutions like The Graph.
  • Event-Driven Design: Design smart contracts with events as their primary API for offchain consumption.
  • Use Case: Building a decentralized application that requires displaying a user's transaction history or a leaderboard of top stakers.

Quick Start

Use the indexing skill to learn how to query onchain events using The Graph.

Frequently Asked Questions about indexing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Why are direct RPC calls inefficient for querying historical blockchain data?

Direct RPC calls are inefficient for querying historical blockchain data because they require scanning blocks individually, which becomes slow and resource-heavy. Indexing solutions like The Graph solve this by pre-processing onchain events into queryable subgraphs.

How do I design smart contracts for efficient offchain data consumption?

To design smart contracts for efficient offchain data consumption, use an event-driven approach where events act as the primary API. This allows indexing tools like The Graph to capture and structure onchain data for fast offchain querying.

What is The Graph and how does it help read onchain events?

The Graph is an indexing protocol that helps read onchain events by organizing them into subgraphs. It pre-processes smart contract events and historical states, allowing decentralized applications to query blockchain data efficiently without direct RPC calls.

Can I use Dune Analytics instead of The Graph for querying onchain data?

Yes, you can use Dune Analytics as an alternative for querying onchain data. While The Graph uses subgraphs for structured event indexing, Dune Analytics provides SQL-based querying of blockchain data, offering a different approach to retrieving historical states.

What's the best way to display a user's transaction history in a dapp?

The best way to display a user's transaction history in a dapp is using an indexing solution like The Graph. By indexing smart contract events through a subgraph, you can quickly query historical transaction records without inefficient block scanning.