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These are a simple set of utilities for working with the bitcoin network/protocol. Together you can use them as a 'flyweight' client. I like small sets of inter-working programs because it is the UNIX philosophy about building small bricks which you can piece together to create a set of highly configurable inter-locking mechanism of programs and daemons.
This is a proof of concept built off of the work-in-progress libbitcoin
Subvertx is a suite of 4 tools:
- poller, downloads the blockchain from a bitcoind into a PostgreSQL database.
- balance, queries the PostgreSQL database downloaded with poller to find the balance of a bitcoin address.
- priv, create a new private key, sign data, verify data or show the bitcoin address of that key.
- mktx, connects to a bitcoind and sends some money from an output to a new address. You can use this in conjunction with a site like blockexplorer.com as a tool to make transactions very simply.
Usage: priv [COMMAND] [ARGS]...
The priv commands are:
new Generate a new private key and output to STDOUT
sign Sign the next argument using the private key in STDIN
verify Verify the next argument using the private key in STDIN
address show the associated bitcoin address
Usage: mktx [HOST[:PORT]] [OUTPUT] [ADDRESS] [AMOUNT]
OUTPUT consists of a transaction hash and output index
AMOUNT uses internal bitcoin values
0.1 BTC = 0.1 * 10^8 = 1000000
poller [DBNAME] [DBUSER] [DBPASSWORD] [HOST:PORT] ...
Usage: balance [BACKEND] [ADDRESS]
BACKEND consists of a colon separated list of parameters.
Make a new private key, sign and verify a transaction hash:
genjix@random:~/subvertx$ priv new > /tmp/private_key
genjix@random:~/subvertx$ priv sign f5cffc95a4a83c23cb9f666c7cf552f27d9845778bb09a98d5169c461483ba41 < /tmp/private_key > signed_data
genjix@random:~/subvertx$ priv verify f5cffc95a4a83c23cb9f666c7cf552f27d9845778bb09a98d5169c461483ba41 "`cat signed_data`" < /tmp/private_key
Show your bitcoin address:
genjix@random:~/subvertx$ priv address < /tmp/private_key
To send some bitcoins, you need to send some bitcoins to the address you generated above (in our case 14DDgj2r8WQEwfTDEjJFBn3wRnHmXzgB3z). Then you need to search the transaction on blockexplorer
and find which output it got sent to.
In our case
, the bitcoins we sent went to transaction 125d49f6b826c564ea99345c56286de4b5126e3da38691caa4ccc68c8c8118d5 (the hash) and output 1.
Our destination address will be: 14UZVX5q1EcE4aT5k1c3eqw3oNUiCN3T23
The amount of bitcoins to send is specified in the bitcoin internal format (which is amount * 10^8):
0.01 BTC = 100 0000
It will then connect to the bitcoind on localhost:8333 and send it the transaction, which will be propagated throughout the network.
genjix@random:~/subvertx$ mktx localhost 125d49f6b826c564ea99345c56286de4b5126e3da38691caa4ccc68c8c8118d5:1 14UZVX5q1EcE4aT5k1c3eqw3oNUiCN3T23 1000000 < /tmp/private_key
1 peers connected.
s: version (85 bytes)
r: version (85 bytes)
s: verack (0 bytes)
r: verack (0 bytes)
s: tx (225 bytes)
20 5b f8 0b 8e 5a 54 5d 1f 10 5d 8b 72 e5 ff fd e8 c6 fb e7 b9 b3 ac 4d 8f 8d f5 9b 26 58 82 12
Those numbers are the transaction hash which can be looked up on blockexplorer.poller
To use the poller you first need to import the schema which can be downloaded from here
(a pre-downloaded blockchain is here
# do all the postgres stuff to make a new database
$ sudo su postgres
# createuser genjix
> CREATE DATABASE bitcoin;
$ wget http://libbitcoin.org/bitcoin.sql
$ psql bitcoin < bitcoin.sql
# it is a good idea to run this in screen
$ screen -S poller
$ poller bitcoin genjix psqlpassword localhost
... starts downloading the blockchain into postgresql
# now close the terminal. You can re-open the terminal with screen -x poller
Poller is doing full blockchain validation. It will take a long time since it's an SQL database and it's validating all the blocks.
Balance needs the full blockchain otherwise you might not get an up-to-date balance reported back. It's fairly simple to use:
$ balance postgresql:database:username:password 1jkjsjkdskjb2kkjbkjdskUbuntu packages
The PPA can be viewed on launchpad
Add these 2 lines to the end of your /etc/apt/sources.list
deb http://ppa.launchpad.net/genjix/libbitcoin/ubuntu oneiric main
deb-src http://ppa.launchpad.net/genjix/libbitcoin/ubuntu oneiric main
$ wget -q "http://keyserver.ubuntu.com:11371/pks/lookup?op=get&search=0x4F8AE60DB3FC740E" -O- | sudo apt-key add -
$ sudo apt-get update
$ sudo apt-get install subvertx
This PPA also has a package for libbitcoin-dev although the API is undocumented at the moment.
Kamil Domański is working on an gentoo ebuild which should be ready tomorrow.
Source code for the non-Ubuntu paupers:https://gitorious.org/libbitcoin/libbitcoinhttps://gitorious.org/libbitcoin/subvertx
I can't stress enough for people to use this at their own peril as it's alpha software.
Thanks goes to,
Kamil Domański (kdomanski)
Jan Engelhardt (se7) <firstname.lastname@example.org
Patrick Strateman (phantomcircuit)
Denis Roio (jaromil)
Amir Taaki (genjix) <email@example.com