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EAS Indexing Service

This tool allows you to quickly spin up your own EAS indexer on any EVM chain that has EAS contracts deployed

Installation

First, clone the repository and install dependencies:

yarn install

You'll need to create a .env file in the root directory of the project. This file should contain the following variables, which you can find in .env.example as well:

DATABASE_URL=postgresql://user:password@localhost:5432/eas-sepolia
INFURA_API_KEY=
INFURA_IPFS_USER=
INFURA_IPFS_PASS=
ALCHEMY_ARBITRUM_API_KEY=
ALCHEMY_SEPOLIA_API_KEY=
ALCHEMY_OPTIMISM_GOERLI_API_KEY=
#POLLING_INTERVAL=60000
#DISABLE_LISTENER=true
#REQUEST_DELAY=500 # How many ms to wait before making a request to RPC (useful for free plans)
#BATCH_SIZE=2000 # How many blocks to fetch at once (some providers have limits)

# Sepolia
CHAIN_ID=11155111

Here you'll want to set CHAIN_ID to the chain you want to index. Make sure that CHAIN_ID has an associated config defined as an entry on EAS_CHAIN_CONFIGS in utils.ts.

Then generate the necessary files for Prisma:

SKIP_PRISMA_VERSION_CHECK=true npx prisma generate

You'll need to skip the version check due to the usage of the typegraphql-prisma package. Read more at Prisma version verification.

Then you can start the Docker services:

docker-compose up -d

If you end up making any changes to this project's files, like adding your own chain config, remember to rebuild the Docker containers so that the changes get redeployed:

docker-compose build
docker-compose up -d

Adding custom chain configs

If you're running a Hardhat node locally, you'll need to add a new listing to the EAS_CHAIN_CONFIGS located in utils.ts. Just copy one of the existing configs and change the values to match your chain.

Localhost testing

If you're running a chain locally using something like Hardhat, you'll need to use a special url to reach the node from inside the Docker container. You can use the host.docker.internal hostname to reach it.

So instead of http://localhost:8545 you'll use http://host.docker.internal:8545.

Yarn gotchas

If you're using Yarn and your packages are not linking correctly due to no node_modules folder being present, you can add a .yarnrc.yml file to the root of the project with the following contents:

nodeLinker: node-modules