bitcoin-rpc-client
This is a lightweight java bitcoind JSON-RPC client binding. It does not require any external dependencies.
Maven
The package is published in the wf.bitcoin group and you can add it to you pom.xml adding a section like this:
<dependency>
<groupId>wf.bitcoin</groupId>
<artifactId>bitcoin-rpc-client</artifactId>
<version>1.1.0</version>
</dependency>
Configuration
In order to know what RPC API to use, the library will look in the bitcoind configuration file (<user home>/.bitcoin/bitcoin.conf) and read the relevant configs:
- rpcconnect
- rpcport
Here is a sample bitcoin.conf that will setup bitcoind to run in regtest mode and in a way compatible with this library:
# Maintain full transaction index, used in lookups by the getrawtransaction call
txindex=1
# Run bitcoind in regtest mode
regtest=1
# Accept command line and JSON-RPC commands
server=1
# Tells bitcoind that the RPC API settings on the following lines apply to the regtest RPC API
[regtest]
# RPC API settings
rpcconnect=localhost
rpcport=9997
Note that the configuration does not contain any API credentials. The authentication is done via a temporary token stored in a cookie file by bitcoind (see details). The approach of using rpcuser and rpcpassword is still supported, even though bitcoind considers it legacy.