Web3 RPC client for Ethereum node

This Ruby Gem is used to connect and communicate with Ethereum node ( geth, parity, etc), having RPC interface.

Installation

Add this line to your application's Gemfile:

gem 'web3-eth'

And then execute:

$ bundle

Or install it yourself as:

$ gem install web3-eth

Usage

Connecting to local node ( or by SSH Tunnel )

web3 = Web3::Eth::Rpc.new

To connect to remote Ethereum node, follow instructions: https://github.com/paritytech/parity/wiki/Wallet-Remote-Access

If you need to connect to remote host, you can specify host, port and HTTP connection options:

web3 = Web3::Eth::Rpc.new 'node.host.com', 8545, { use_ssl: true, read_timeout: 120 } 

Calling eth interface:

>> web3.eth.blockNumber
4376369

>> web3.eth.getBalance '0x829BD824B016326A401d083B33D092293333A830'
3916.6597314456685

>> block = web3.eth.getBlockByNumber 4376369
#<Web3::Eth::Block:0x007f844d6f1138 @block_data={"author"=>"0x829bd824b016326a401d083b33d092293333a830", ...

>> block.timestamp_time
2017-10-17 12:51:36 +0300

>> block.transactions.count
129

>> block.transactions[0].from
"0xb2930b35844a230f00e51431acae96fe543a0347"

>> block.transactions[0].value_eth
0.51896811

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/izetex/web3-eth. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.