1. Setup

Now, let's develop the Plasma Wallet!

In this chapter, we will start the transaction aggregator required to run Plasma and install the Library required for the Wallet Application.

1-1. Transaction Aggregator

Run local aggregator

Get the aggregator from here.

And then, start it with Docker.

$ git clone -b v0.4.1 https://github.com/cryptoeconomicslab/gazelle.git
$ cd gazelle
$ npm run docker:build
$ npm run docker:cp
$ npm run docker:start

Contracts config file config.local.json is generated at the root directory after npm run docker:build f you have not installed them yet.

1-2. Application


Install the following libraries using npm to enable fund transfers in Plasma.

Copy config.local.json file to your application repository root.

$ mkdir plasma-wallet
$ cd plasma-wallet
$ npm init
$ npm i ethers
$ npm i leveldown
$ npm i @cryptoeconomicslab/eth-plasma-light-client@0.4.1 @cryptoeconomicslab/primitives @cryptoeconomicslab/level-kvs
$ cp -p <your gazelle path>/integration-test/aggregator/src/config.local.json ./config.local.json

Prepare the ReadLine for CLI application

This is the initial settings of ReadLine, which is required to implement an interactive CLI Wallet.

const readline = require("readline")
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
function cliWalletReadLine() {
rl.question(">> ", input => {
const args = input.split(/\s+/)
const command = args.shift()
switch (command) {
case "quit":
console.log(`${command} is not found`)
function main() {

Go to the next step!

The setup is now complete.

Move on to the 2. Start client step.