def sendToDataPubKey(bitcoind, data, changeHash, fee): """ Make a transaction to publish data on the block chain with an OP_RETURN output. No funds are sent to the OP_RETURN output: everything goes to fee and to the change address. The transaction is returned, and is NOT published on the Bitcoin network by this function. Arguments: bitcoind: Bitcoind; the bitcoin daemon from which to retrieve this information data: str; the data to be included in the scriptPubKey (max. 40 bytes) changeHash: str; the SHA256- and RIPEMD160-hashed public key to which any change should be sent (equivalent to the bitcoin address) fee: int; the transaction fee (in Satoshi) Return value: Transaction; the transaction that sends funds as specified. Exceptions: Exception: insufficient funds """ totalIn, inputs = getInputsForAmount(bitcoind, fee) change = totalIn - fee print "%d -> %d, %d" % (totalIn, change, fee) tx = Transaction( tx_in = [ TxIn(x[0], x[1]) for x in inputs ], tx_out = [ TxOut(0, Script.dataPubKey(data)), TxOut(change, Script.standardPubKey(changeHash)) ] ) for i in range(len(inputs)): scriptPubKey = Script.deserialize(inputs[i][2]) key = Key() key.setPrivateKey(inputs[i][3]) tx.signInput(i, scriptPubKey, [None, key.getPublicKey()], [key]) return tx
def sendToDataPubKey(bitcoind, data, changeHash, fee):
"""
Make a transaction to publish data on the block chain with an OP_RETURN
output. No funds are sent to the OP_RETURN output: everything goes to fee
and to the change address. The transaction is returned, and
is NOT published on the Bitcoin network by this function.
Arguments:
bitcoind: Bitcoind; the bitcoin daemon from which to retrieve this information
data: str; the data to be included in the scriptPubKey (max. 40 bytes)
changeHash: str; the SHA256- and RIPEMD160-hashed public key to which any
change should be sent (equivalent to the bitcoin address)
fee: int; the transaction fee (in Satoshi)
Return value:
Transaction; the transaction that sends funds as specified.
Exceptions:
Exception: insufficient funds
"""
totalIn, inputs = getInputsForAmount(bitcoind, fee)
change = totalIn - fee
print "%d -> %d, %d" % (totalIn, change, fee)
tx = Transaction(tx_in=[TxIn(x[0], x[1]) for x in inputs],
tx_out=[
TxOut(0, Script.dataPubKey(data)),
TxOut(change, Script.standardPubKey(changeHash))
])
for i in range(len(inputs)):
scriptPubKey = Script.deserialize(inputs[i][2])
key = Key()
key.setPrivateKey(inputs[i][3])
tx.signInput(i, scriptPubKey, [None, key.getPublicKey()], [key])
return tx
