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ethereum-listener

v0.0.4

Published

This little npm module subscribes to the event of a contract in the ethereum blockchain and prints out the information.

Downloads

3

Vulnerabilities

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Links

Git

Maintainers

nomsinomsi

Keywords

ethereumeventsubscriptionmonitoringevent

Readme

Ethereum contract event listener

This NPM module can subscribe to events that are fired by contracts in the Ethereum blockchain. At this time the module can only be used as a CLI tool.

Installation

At the moment there are two possibilities to run the CLI tool.

https://www.npmjs.com/package/ethereum-listener

1. Run the script locally

First download the project from Github and navigate to the project directory. Then simply run:

$ node index.js

2. Install as global NPM package

Install the CLI tool as a global NPM packe by running:

$ npm install ethereum-listener -g

Now you can easily start the script by typing:

$ ethereum-listener

Usage

After starting the script, it will ask you for the address of your ethereum client and the password for the first user (the one at eth.accounts[0]). Then it asks for the contract address as well as for the contract abi. The last thing you need to provide is the name of the event that you want to subscribe to.

  _____   _     _                                                  _   _         _                                
 | ____| | |_  | |__     ___   _ __    ___   _   _   _ __ ___     | | (_)  ___  | |_    ___   _ __     ___   _ __ 
 |  _|   | __| | '_ \   / _ \ | '__|  / _ \ | | | | | '_ ` _ \    | | | | / __| | __|  / _ \ | '_ \   / _ \ | '__|
 | |___  | |_  | | | | |  __/ | |    |  __/ | |_| | | | | | | |   | | | | \__ \ | |_  |  __/ | | | | |  __/ | |   
 |_____|  \__| |_| |_|  \___| |_|     \___|  \__,_| |_| |_| |_|   |_| |_| |___/  \__|  \___| |_| |_|  \___| |_|   
                                                                                                                                                                                                                       
? Enter your ethereum client address: http://localhost:8545
? Enter your ethereum user password: ***
? Enter the address of the contract that you want to listen to: 0x593d12e2676e50b0254346f1bac6ff1257323706
? Enter the ABI of the contract that you want to listen to: Received
? Enter the name of the event that you want to subscribe to: someEvent