sc-gasstation

An experimental service providing a way to exchange ERC20 tokens in ETH to pay for future transactions.

Introduction

We presented the gasstation on DEVCON3 (Nov 4th 2017). You can view the video here :

Installing

$ npm install -g ethereumjs-testrpc
$ npm install -g generate-contract-interface
$ npm install -g browserify
$ npm install

Now create contract interfaces and browserify utility library

. ./build.sh

Running Truffle tests

Gasstation using the push-fill ( where gasstation service triggers the tokens->ETH exchange )

$ truffle test test/gasStation-pushfill.js

Running the gasstation API service

In one terminal - start testRPC

$ testrpc -p 18546

in another terminal - create a file .env containing these parameters :

privatekey="(a private key holding the ETH to supply the upfront gas)"
gastankaddress="(the address of the gastank contract)"
erc20token="(the address of the ERC20 token your gastank accepts)"
PORT=3000

Now start up your gastank

nodemon

or

node index.js

Frontend

A sample frontend that uses the gastank API can be found here : https://github.com/swarmcity/sc-gasstationclient