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Note that the endianness of the hashes is still very ad-hoc and messy. Next step is to pick an endianness and stick with it, to reduce the number of times reverseBytes is used.
To get started, ensure you have the latest JDK installed, and download Maven from: http://maven.apache.org/ Then run "mvn clean package" to compile the software. You can also run "mvn site:site" to generate a website with useful information like JavaDocs. The outputs are under the target/ directory. Now ensure you're running a BitCoin node locally and run the example app: cd out java com.google.bitcoin.examples.PingService It will download the block chain and eventually print a BitCoin address. If you send coins to it, you should get them back a few minutes later when a block is solved. Note that if you connect to a node that is itself downloading the block chain, you will see very slow progress (1 block per second or less). Find a node that isn't heavily loaded to connect to. If you get a SocketDisconnectedException, the node you've connected to has its max send buffer set to low (unfortunately the default is too low). Connect to a node that has a bigger send buffer, settable by passing -maxsendbuffer=25600 to the Bitcoin C++ software.
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