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Title: Python code for private key --> address Post by: jl2012 on August 28, 2012, 05:09:03 PM Is there any Python code that translates private key (in HEX format) to an bitcoin address? Thanks!
Title: Re: Python code for private key --> address Post by: vuce on August 28, 2012, 05:37:38 PM Check electrum code (https://gitorious.org/electrum/electrum/blobs/master/lib/wallet.py). Everything's there.
Title: Re: Python code for private key --> address Post by: etotheipi on August 28, 2012, 06:05:02 PM The old PyBtcEngine project (the precursor to Armory), had a pure-python implementation of all the ECDSA math. Granted, that was based on an old post by Russian forum user "Lis", in which he released the pure-python-ECDSA code to public domain. I just wrapped it up.
If you clone the PyBtcEngine (https://github.com/etotheipi/PyBtcEngine) project, you will probably only need to to "from pybtcengine import *" and then run the relevant calls. Here's some sample code that showing how to convert private key to address in the first four lines (in bold). Then it does a ton more. This is in unittest.py, where I created a private key ('aa'*32) and an empty transaction and tested signing then verifying it. Quote print 'Testing PyCreateAndSignTx' AddrA = PyBtcAddress().createFromPrivateKey(hex_to_int('aa'*32)) AddrB = PyBtcAddress().createFromPrivateKey(hex_to_int('bb'*32)) print ' Address A:', AddrA.getAddrStr() print ' Address B:', AddrB.getAddrStr() # This TxIn will be completely ignored, so it can contain garbage txinA = PyTxIn() txinA.outpoint = PyOutPoint().unserialize(hex_to_binary('00'*36)) txinA.binScript = hex_to_binary('99'*4) txinA.sequence = hex_to_binary('ff'*4) txoutA = PyTxOut() txoutA.value = 50 * (10**8 ) txoutA.binScript = '\x76\xa9\x14' + AddrA.getAddr160() + '\x88\xac' tx1 = PyTx() tx1.version = 1 tx1.numInputs = 1 tx1.inputs = [txinA] tx1.numOutputs = 1 tx1.outputs = [txoutA] tx1.locktime = 0 tx1hash = tx1.getHash() print 'Creating transaction to send coins from A to B' tx2 = PyCreateAndSignTx( [[ AddrA, tx1, 0 ]], [[AddrB, 50*(10**8 )]]) print 'Verifying the transaction we just created', psp = PyScriptProcessor() psp.setTxObjects(tx1, tx2, 0) verifResult = psp.verifyTransactionValid() More than you asked for... but maybe you'll be interested in all of it later :) Btw, Armory has the same functionality, but I outsourced all the crypto to C++, where it's a hell of a lot faster. If you want to use the latest, you can do that, but it will require compiling... but the crypto itself hasn't really changed. Title: Re: Python code for private key --> address Post by: JeromeS on September 06, 2012, 01:20:21 PM https://bitcointalk.org/index.php?topic=84238.0 ;)
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