Squid tracking USDC transfers across three chains

This squid captures USDC Transfer events on ETH, BSC and Base, stores them in the same database and serves the data over a common GraphQL API.

Data ingester ("processor") code for each network is located at the corresponding src/ subdirectory: src/eth, src/bsc or src/base. The scripts file commands.json contains commands for running each processor (process:eth, process:bsc and process:base correspondingly). GraphQL server runs as a separate process started by sqd serve. You can also use sqd run to run all the services at once.

The squid uses Subsquid Network as its primary data source.

Dependencies: Node.js, Docker, Git.

Quickstart

# 0. Install @subsquid/cli a.k.a. the sqd command globally
npm i -g @subsquid/cli

# 1. Clone the repo
git clone https://github.com/subsquid-labs/quest-triple-chain-squid
cd quest-triple-chain-squid

# 2. Install dependencies
npm ci

# 3. Start containers for the Postgres database and the network query gateway
sqd up

# 4. Build and start the processors _in separate terminals_
sqd process:eth
sqd process:bsc
sqd process:base

# 5. Start the GraphQL server by running in yet another terminal
sqd serve

A GraphiQL playground will be available at localhost:4350/graphql.