An Electrum Server written in Java
This is designed as replacement for the python electrum server: https://github.com/spesmilo/electrum-server
Reasons to exist
The inital blockchain sync is multithreaded and a good bit faster than the python implementation (2 - 3 days with a fast system and SSD)
It is good to have multiple implementations of things in general
Not sure what to use? Use slopbucket or rocksdb.
More details DATABASE
How to run
Make your SSL cert: ./makekey.sh
Build: ant jar
Config: cp jelly.default.conf jelly.conf edit jelly.conf as makes sense
Run: while true do java -Xmx3g -jar jar/Jelectrum.jar jelly.conf done
Feel free to connect to my instance which should be running the latest version.
b.1209k.com 50001 (tcp) b.1209k.com 50002 (ssl) h.1209k.com 50001 (tcp) h.1209k.com 50002 (ssl)
What Doesn't Work
HTTP/HTTPS. I see no strong reason to support those over TCP and SSL+TCP. I imagine it wouldn't be too hard but I don't see the need. If someone feels otherwise, let me know.
The following commands that clients don't seem to issue (yet):
blockchain.address.get_proof blockchain.address.get_mempool blockchain.utxo.get_address
(To check this list compare src/blockchain_processor.py from electrum-server to StratumConnection.java)
If you are going to run it, monitor it!
I've made a monitoring tool that anyone to can use to monitor their electrum server (jelectrum or otherwise):
Getting a heap dump
Example command: jmap -dump:live,format=b,file=jelectrum-20151124.bin 19958