Wildcard Indexing Template

For a complete guide to all Envio indexer features, visit the documentation website.

With HyperIndex, developers can enable wildcard indexing, allowing them to index events from any contract that matches a given event signature. This is especially useful when working with contracts that follow common standards like ERC20, ERC721, or ERC1155.

You can learn more about wildcard indexing in the documentation: https://docs.envio.dev/docs/HyperIndex/wildcard-indexing

To enable wildcard indexing, simply pass wildcard: true in the handler configuration:

ERC20.Transfer.handler(
    async ({ event, context }) => {
        // ...your handler logic
    },
    { wildcard: true }
);

Prerequisites

Before running the indexer locally, make sure you have the following installed:

• Node.js 18+
• pnpm
• Docker Desktop

Running the Indexer

Add your Envio API key to the .env file, then start the indexer:

pnpm dev

If you make changes to config.yaml or schema.graphql, regenerate the type files:

pnpm codegen

GraphQL Playground

While indexer running, visit the Envio Console(https://envio.dev/console) to open the GraphQL Playground and query your indexed data.