scala-rpc (Bitcoin and Ethereum JSON RPC client)

Scala client library for different blockchain nodes. Currently, Bitcoin and Ethereum are supported Litecoin, Bitcoin cash and other Bitcoin-like nodes should be supported as well

This is RPC client library for connecting to bitcoind and geth/parity nodes. Please, consider this library as experimental. API in future can be changed.

This library is not replacement of Bitcoin/Ethereum nodes. It connects to nodes using http json rpc protocol.

Supports non-blocking IO

Different http transport libraries are supported. Currently there are implementations using:

• Spring's WebClient (for non-blocking IO).
• scalaj-http for blocking IO

Library uses Typelevel's https://github.com/typelevel/cats to support different types of results (Try for blocking API and Mono for Spring's WebClient)

Features

Library is modular and provides different layers:

• thin layer over JSON RPC
• different transaction senders for Ethereum (you can use the same API for sending transactions and sign them in the node or sign them right in Java code, from your client)
• common blockchain listeners for Bitcoin/Ethereum: you can listen to different events using the same api for both blockchains
• contract wrappers for Ethereum

Adding dependencies (Maven)

1. Add bintray daonomic repository

<repositories>
    <repository>
        <id>daonomic-bintray</id>
        <name>daonomic-bintray</name>
        <url>https://dl.bintray.com/daonomic/maven/</url>
    </repository>
</repositories>

2. Add scalether dependency

<dependency>
    <groupId>io.daonomic.scalether</groupId>
    <artifactId>contract_2.13</artifactId>
    <version>${scalether.version}</version>
</dependency>

Adding dependencies (sbt)

1. Add bintray daonomic repository

resolvers += Resolver.bintrayRepo("daonomic", "maven")

2. Add scalether dependency

libraryDependencies += "io.daonomic.scalether" %% "contract" % scaletherVersion

Writing some code

see https://github.com/daonomic/scala-rpc/tree/master/scalether for Ethereum examples

and https://github.com/daonomic/scala-rpc/tree/master/bitcoin for Bitcoin examples

For information about smart contract wrappers generator see https://github.com/daonomic/scalether-maven-plugin

Suggestions

You are welcome to suggest features and report bugs found!

License

scala-rpc is available under MIT License.