data-fetcher

ZKsync Era Block Explorer Data Fetcher

Overview

ZKsync Era Block Explorer Data Fetcher service exposes and implements an HTTP endpoint to retrieve aggregated data for a certain block / range of blocks from the blockchain. This endpoint is called by the Block Explorer Worker service.

Installation

$ npm install

Setting up env variables

• Create .env file in the data-fetcher package folder and copy paste .env.example content in there.

cp .env.example .env

• In order to tell the service where to get the blockchain data from set the value of the BLOCKCHAIN_RPC_URL env var to your blockchain RPC API URL. For ZKsync Era testnet it can be set to https://sepolia.era.zksync.dev. For ZKsync Era mainnet - https://mainnet.era.zksync.io.

Running the app

# development
$ npm run dev

# watch mode
$ npm run dev:watch

# debug mode
$ npm run dev:debug

# production mode
$ npm run start

Test

# unit tests
$ npm run test

# unit tests debug mode
$ npm run test:debug

# test coverage
$ npm run test:cov

Development

Linter

Run npm run lint to make sure the code base follows configured linter rules.