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Constructing reorg w/ dbl-spend blkchain test
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| #! /usr/bin/python | ||
| from pybtcengine import * | ||
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| blkfile = open('/home/alan/.bitcoin/blk0001.dat','r') | ||
| blkfile.seek(8,0) | ||
| genBlock = PyBlockHeader().unserialize(blkfile.read(80)) | ||
| numTx = blkfile.read(1) | ||
| genTx = PyTx().unserialize(blkfile.read(285)) | ||
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| print 'Genesis block header:' | ||
| genBlock.pprint() | ||
| print 'Genesis block tx:' | ||
| genTx.pprint() | ||
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| ################################################################################ | ||
| def findDiff1Nonce(blkHeader): | ||
| for n in range(2**33): | ||
| h.nonce = n | ||
| theHash = hash256(h.serialize()) | ||
| if theHash[-4:] == '\x00\x00\x00\x00': | ||
| return h | ||
| print 'No nonce found!' | ||
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| ################################################################################ | ||
| # We will reference src TxOuts by the blkNum and TxIndex | ||
| # Src TxOut ~ {tx, txoutIndex, BtcAddr} / COINBASE = -1 | ||
| # Dst TxOut ~ {BtcAddr, value} | ||
| def createTx(srcTxOuts, dstAddrVal): | ||
| tx = PyTx() | ||
| tx.numInputs = len(srcTxOuts) | ||
| tx.numOutputs = len(dstAddrs) | ||
| tx.inputs = [] | ||
| tx.outputs = [] | ||
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| coinbaseTx = False | ||
| if tx.numInputs==1 and srcTxOuts[0] == -1: | ||
| coinbaseTx = True | ||
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| #################### | ||
| for i in range(tx.numOutputs): | ||
| txout = PyTxOut() | ||
| txout.value = dstAddrVal[i][1] | ||
| dstAddr160 = dstAddr[i][0].getAddr160() | ||
| if(coinbaseTx): | ||
| txout.binPKScript = ''.join(['\x41', \ | ||
| dstAddr160, | ||
| opCodeLookup['OP_CHECKSIG']]) | ||
| else: | ||
| txout.binPKScript = ''.join([opCodeLookup['OP_DUP'], \ | ||
| opCodeLookup['OP_HASH160'], \ | ||
| '\x14', \ | ||
| dstAddr160, | ||
| opCodeLookup['OP_EQUALVERIFY'], \ | ||
| opCodeLookup['OP_CHECKSIG']]) | ||
| tx.outputs.append(txout) | ||
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| #################### | ||
| for i in range(tx.inputs): | ||
| txin = PyTxIn() | ||
| txin.outpoint = PyOutPoint() | ||
| if(coinbaseTx): | ||
| txin.outpoint.txOutHash = '\x00'*32 | ||
| txin.outpoint.index = '\xff'*4 | ||
| else: | ||
| txin.outpoint.txOutHash = hash256(srcTxOuts[0][0].serialize()) | ||
| txin.outpoint.index = srcTxOuts[0][1] | ||
| txin.binScript = ''.join(['\xaa\xbb\xcc\xdd']) | ||
| txin.intSeq = 2**32-1 | ||
| tx.inputs.append(txin) | ||
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| #################### | ||
| # Now we apply the ultra-complicated signature procedure | ||
| # We need a copy of the Tx with all the txin scripts blanked out | ||
| txCopySerialized = tx.serialize() | ||
| for i in range(tx.inputs): | ||
| if coinbaseTx: | ||
| pass # no sig on coinbase txs | ||
| else: | ||
| txCopy = PyTx().unserialize(txCopySerialized) | ||
| thisTxIn = txCopy.inputs[i] | ||
| txoutIdx = srcTxOuts[i][1] | ||
| prevTxOut = srcTxOuts[i][0].outputs[txoutIdx] | ||
| btcAddr = srcTxOuts[i][2] | ||
| hashCode = int_to_binary(hashtype, widthBytes=4) | ||
| binToSign = '' | ||
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| # Copy the script of the TxOut we're spending, into the txIn script | ||
| thisTxIn.binScript = prevTxOut.binPKScript | ||
| binToSign = hash256(txCopy.serialize() + hashCode) | ||
| signature = addrPrivKey.generateDERSignature(binToSign) + '\x01' | ||
| if len(prevTxOut.binPKScript) > 26: | ||
| #Spend-CB: only Sig needed | ||
| tx.inputs[i].binScript = signature | ||
| else | ||
| tx.inputs[i].binScript = signature + '\x41' + addrPrivKey | ||
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| return tx | ||
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| txlist = [] | ||
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| AddrA = PyBtcAddress().createFromPublicKey(hex_to_binary('04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f')) | ||
| AddrB = PyBtcAddress().generateNew() | ||
| AddrC = PyBtcAddress().generateNew() | ||
| AddrD = PyBtcAddress().generateNew() | ||
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| def btcValue(btc): | ||
| return btc*(10**8) | ||
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| Blk0_Tx0 = createTx( [-1], [[AddrA, btcValue(50)]] ) | ||
| Blk1_Tx0 = createTx( [-1], [[AddrB, btcValue(50)]] ) | ||
| Blk2_Tx0 = createTx( [-1], [[AddrB, btcValue(50)]] ) | ||
| Blk2_Tx1 = createTx( [[Blk1_Tx0, 0, AddrB]], [[ AddrC, btcValue(10)], | ||
| [ AddrB, btcValue(40)]] ) | ||
| Blk3_Tx0 = createTx( [-1], [[AddrC, btcValue(50)]] ) | ||
| Blk3_Tx1 = createTx( [[Blk2_Tx1, 1, AddrB]] [[AddrD, btcValue(40)]] ) | ||
| Blk3_Tx2 = createTx( [[Blk2_Tx1, 0, AddrC]] [[AddrD, btcValue(10)]] ) | ||
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