ETH Transaction sender

Intro

This project makes use of the Web3 Javascript Library, and a given project on Infura, which is a third-party service that allows interaction with the Ethereum network via the web3 library.

Prerequisites

NodeJS version 14 (or newer) is required.

Project setup

Setting the .env file

First, make a copy of the .env.example file, and rename it to .env:

cp .env.example .env

This is a fairly simple nodejs project. In order to build it, just cd into the project directory and run:

npm install

Then, run npm run start in order to initiate the server.

Usage

This script is designed to be called as a web API, via express (listening port: 8000).

Arguments explanation

network - required

Defines the Ethereum network. Can be one of mainnet, rinkeby, ropsten, kovan, goerli

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project - required

Defines the project id on thge Infura service.

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from - required

Defines the Ethereum address of the sender. Note: the address must not contain the 0x starting part, this is added from the script itself.

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to - required

Defines the Ethereum address of the receiver. Note: the address must not contain the 0x starting part, this is added from the script itself.

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key - required

Defines the Ethereum sender address private key. This is needed for the web3 library, in order to sign the transaction.

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data - optional

Optional parameter. Defines any arbitrary data that will be added as additional payload to the transaction. Can be a note from the sender, a greeting, or anything else.

Docker Deployment

The app can be instantly deployed via Docker. Just run

docker-compose up --build

And the docker container will be built and run. The app will then be available via localhost:8000

Notice: The docker-compose.yml file assumes that an external docker network (docker_evolved5g_net) has already been set up. So, you either need to have the Evolved5g-Pilot project initialized, or just create an external network:

docker network create docker_evolved5g_net