bitcoin_multisig.py

from bitcoinrpc.connection import BitcoinConnection


con = BitcoinConnection(host='127.0.0.1', port=18332, user='u', password='p')

destination_addr = 'mh5YsB8cSLT2NxLKkdaZANBqhLSDgMFgGj'
num_signatures = 2
signer_addr = 'mfcWQhBtWGPcSBPiPDeUJZ5n1Ud7XF2hSK'
additional_signer_addr = 'mr37a4xtZZByapa9neEPC3oYLxbEaFyCkP'
amount = 20.0
fees = 5e-5
multisig = con.proxy.createmultisig(
    num_signatures,
    [signer_addr, additional_signer_addr, con.validateaddress(destination_addr).pubkey]
)
UTX0_txid = con.sendtoaddress(multisig[u'address'], amount)
raw = con.getrawtransaction(UTX0_txid)
print raw.vout
# [{u'scriptPubKey': {u'reqSigs': 1, u'hex': u'76a9146fc86f9c973a9b9391627f30f63cc0e2c192105a88ac', u'addresses': [u'mqi1QtCCDb6FCa8fWXLQwMYEpYQD4fVpy1'], u'asm': u'OP_DUP OP_HASH160 6fc86f9c973a9b9391627f30f63cc0e2c192105a OP_EQUALVERIFY OP_CHECKSIG', u'type': u'pubkeyhash'}, u'value': Decimal('28.99991680'), u'n': 0}, {u'scriptPubKey': {u'reqSigs': 1, u'hex': u'a914489dc590a651425da845d81e66f23fc5cd4b04f487', u'addresses': [u'2MysBeGWqqewwYGTtBt19cQ3DZQ7aTkMCFZ'], u'asm': u'OP_HASH160 489dc590a651425da845d81e66f23fc5cd4b04f4 OP_EQUAL', u'type': u'scripthash'}, u'value': Decimal('20.00000000'), u'n': 1}]

for UTX0_vout, vout in enumerate(raw.vout):
    if vout['scriptPubKey']['addresses'] == [multisig[u'address']]:
        UTX0_scriptPubKey = vout['scriptPubKey']['hex']
        break
else:
    raise ValueError('valid vout not found')

print UTX0_vout
print UTX0_scriptPubKey

withdraw_tx = con.createrawtransaction(
    [{"txid": UTX0_txid, "vout": UTX0_vout}],
    {destination_addr: amount - fees}
)
print withdraw_tx

partially_signed_tx = con.signrawtransaction(
    withdraw_tx,
    [{"txid": UTX0_txid, "vout": UTX0_vout, 'scriptPubKey': UTX0_scriptPubKey, 'redeemScript': multisig['redeemScript']}],
    [con.proxy.dumpprivkey(signer_addr)]
)
print partially_signed_tx

finally_signed = con.signrawtransaction(
    partially_signed_tx['hex'],
    [{"txid": UTX0_txid, "vout": UTX0_vout, 'scriptPubKey': UTX0_scriptPubKey, 'redeemScript': multisig['redeemScript']}],
    [con.proxy.dumpprivkey(destination_addr)]
)

print finally_signed

sent = con.proxy.sendrawtransaction(finally_signed['hex'])
print sent