Topic: Python code for private key --> address (Read 3974 times)
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 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.
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.
If you clone the 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()
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.
Check electrum code. Everything's there.
Is there any Python code that translates private key (in HEX format) to an bitcoin address? Thanks!
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