The Graph

If your app needs fast, structured access to on‑chain history, start by planning the questions you want to answer, then turn them into a subgraph. Sketch your data model (accounts, trades, positions, NFTs, proposals), define a schema.graphql, and write event and call handlers in AssemblyScript to transform raw chain data into clean entities. Use The Graph CLI to scaffold, codegen, build, and test. Validate with Matchstick unit tests and the Studio Playground before you hit deploy. When you publish, pick the target network (e.g., Ethereum mainnet or an L2), set a clear description, and version your release so clients can safely migrate without breaking.

To use your data in a product, wire the subgraph’s endpoint into your frontend or backend with GraphQL. In React, point Apollo Client to the URL and shape queries around pagination (first/skip), ordering, and selective fields to keep responses light. Pull historical snapshots using block heights to render time travel charts. A portfolio tracker can aggregate a user’s swaps and liquidity positions; an NFT marketplace can filter collections by trait or sales volume; a governance portal can list proposals and voter power at specific blocks. Analysts can export results to CSV for BI tools or pipe queries into notebooks for modeling without touching a node.

Operate like a production team from day one. Monitor indexing status and query performance in the Explorer, and choose indexers that meet your latency and reliability needs. Allocate a query budget and update your cost model as traffic grows. When you ship schema changes, publish a new version, maintain aliases for backward compatibility, and announce deprecations in your docs. Automate CI to build and test on every commit, and set alerts for skipped blocks or handler failures. For high‑throughput chains or heavy event volumes, consider a Substreams‑powered approach to accelerate parallel processing and keep indexing times predictable.

Leverage the wider network to amplify discoverability and quality. Curators can signal on your subgraph to help users find it; indexers compete to serve your queries efficiently; delegators strengthen the network’s capacity. As a builder, you can compose existing public subgraphs instead of re‑indexing the same contracts—ideal for rapid prototyping. Product managers can plan features around readily available metrics; data teams can schedule daily jobs that refresh dashboards; bot developers can trigger notifications on threshold events (whale transfers, liquidation risk, quorum reached). Content creators and technical writers can embed live GraphQL examples in docs and blog posts, ensuring tutorials stay accurate across versions.