Exemple #1
0
def create_transaction(outPoint, sig, value, nTime, scriptPubKey=CScript()):
    ''' creates a CTransaction object provided input-output data
    '''
    tx = CTransaction()
    tx.vin.append(CTxIn(outPoint, sig, 0xffffffff))
    tx.vout.append(CTxOut(value, scriptPubKey))
    tx.nTime = nTime
    tx.calc_sha256()
    return tx
Exemple #2
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    def sign_stake_tx(self, block, stake_in_value, fZPoS=False):
        ''' signs a coinstake transaction
        :param      block:           (CBlock) block with stake to sign
                    stake_in_value:  (int) staked amount
                    fZPoS:           (bool) zerocoin stake
        :return:    stake_tx_signed: (CTransaction) signed tx
        '''
        self.block_sig_key = CECKey()

        if fZPoS:
            self.log.info("Signing zPoS stake...")
            # Create raw zerocoin stake TX (signed)
            raw_stake = self.node.createrawzerocoinstake(block.prevoutStake)
            stake_tx_signed_raw_hex = raw_stake["hex"]
            # Get stake TX private key to sign the block with
            stake_pkey = raw_stake["private-key"]
            self.block_sig_key.set_compressed(True)
            self.block_sig_key.set_secretbytes(bytes.fromhex(stake_pkey))

        else:
            # Create a new private key and get the corresponding public key
            self.block_sig_key.set_secretbytes(hash256(pack('<I', 0xffff)))
            pubkey = self.block_sig_key.get_pubkey()
            # Create the raw stake TX (unsigned)
            scriptPubKey = CScript([pubkey, OP_CHECKSIG])
            outNValue = int(stake_in_value + 2 * COIN)
            stake_tx_unsigned = CTransaction()
            stake_tx_unsigned.nTime = block.nTime
            stake_tx_unsigned.vin.append(CTxIn(block.prevoutStake))
            stake_tx_unsigned.vin[0].nSequence = 0xffffffff
            stake_tx_unsigned.vout.append(CTxOut())
            stake_tx_unsigned.vout.append(CTxOut(outNValue, scriptPubKey))
            # Sign the stake TX
            stake_tx_signed_raw_hex = self.node.signrawtransaction(
                bytes_to_hex_str(stake_tx_unsigned.serialize()))['hex']

        # Deserialize the signed raw tx into a CTransaction object and return it
        stake_tx_signed = CTransaction()
        stake_tx_signed.deserialize(
            BytesIO(hex_str_to_bytes(stake_tx_signed_raw_hex)))
        return stake_tx_signed
Exemple #3
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    def sign_stake_tx(self, block, stake_in_value, fZPoS=False):
        ''' signs a coinstake transaction
        :param      block:           (CBlock) block with stake to sign
                    stake_in_value:  (int) staked amount
                    fZPoS:           (bool) zerocoin stake
        :return:    stake_tx_signed: (CTransaction) signed tx
        '''
        self.block_sig_key = CECKey()

        if fZPoS:
            self.log.info("Signing zPoS stake...")
            # Create raw zerocoin stake TX (signed)
            raw_stake = self.node.createrawzerocoinstake(block.prevoutStake)
            stake_tx_signed_raw_hex = raw_stake["hex"]
            # Get stake TX private key to sign the block with
            stake_pkey = raw_stake["private-key"]
            self.block_sig_key.set_compressed(True)
            self.block_sig_key.set_secretbytes(bytes.fromhex(stake_pkey))

        else:
            # Create a new private key and get the corresponding public key
            self.block_sig_key.set_secretbytes(hash256(pack('<I', 0xffff)))
            pubkey = self.block_sig_key.get_pubkey()
            # Create the raw stake TX (unsigned)
            scriptPubKey = CScript([pubkey, OP_CHECKSIG])
            outNValue = int(stake_in_value + 2*COIN)
            stake_tx_unsigned = CTransaction()
            stake_tx_unsigned.nTime = block.nTime
            stake_tx_unsigned.vin.append(CTxIn(block.prevoutStake))
            stake_tx_unsigned.vin[0].nSequence = 0xffffffff
            stake_tx_unsigned.vout.append(CTxOut())
            stake_tx_unsigned.vout.append(CTxOut(outNValue, scriptPubKey))
            # Sign the stake TX
            stake_tx_signed_raw_hex = self.node.signrawtransaction(bytes_to_hex_str(stake_tx_unsigned.serialize()))['hex']

        # Deserialize the signed raw tx into a CTransaction object and return it
        stake_tx_signed = CTransaction()
        stake_tx_signed.deserialize(BytesIO(hex_str_to_bytes(stake_tx_signed_raw_hex)))
        return stake_tx_signed
Exemple #4
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    def create_block(self,
                     prev_hash,
                     staking_prevouts,
                     height,
                     node_n,
                     s_address,
                     fInvalid=0):
        api = self.nodes[node_n]
        # Get current time
        current_time = int(time.time())
        nTime = current_time & 0xfffffff0

        # Create coinbase TX
        coinbase = create_coinbase(height)
        coinbase.vout[0].nValue = 0
        coinbase.vout[0].scriptPubKey = b""
        coinbase.nTime = nTime
        coinbase.rehash()

        # Create Block with coinbase
        block = create_block(int(prev_hash, 16), coinbase, nTime)

        # Find valid kernel hash - Create a new private key used for block signing.
        if not block.solve_stake(staking_prevouts):
            raise Exception("Not able to solve for any prev_outpoint")

        # Create coinstake TX
        amount, prev_time, prevScript = staking_prevouts[block.prevoutStake]
        outNValue = int(amount + 250 * COIN)
        stake_tx_unsigned = CTransaction()
        stake_tx_unsigned.nTime = block.nTime
        stake_tx_unsigned.vin.append(CTxIn(block.prevoutStake))
        stake_tx_unsigned.vin[0].nSequence = 0xffffffff
        stake_tx_unsigned.vout.append(CTxOut())
        stake_tx_unsigned.vout.append(
            CTxOut(outNValue, hex_str_to_bytes(prevScript)))

        if fInvalid == 1:
            # Create a new private key and get the corresponding public key
            block_sig_key = CECKey()
            block_sig_key.set_secretbytes(hash256(pack('<I', 0xffff)))
            pubkey = block_sig_key.get_pubkey()
            stake_tx_unsigned.vout[1].scriptPubKey = CScript(
                [pubkey, OP_CHECKSIG])
        else:
            # Export the staking private key to sign the block with it
            privKey, compressed = wif_to_privkey(api.dumpprivkey(s_address))
            block_sig_key = CECKey()
            block_sig_key.set_compressed(compressed)
            block_sig_key.set_secretbytes(bytes.fromhex(privKey))
            # check the address
            addy = key_to_p2pkh(bytes_to_hex_str(block_sig_key.get_pubkey()),
                                False, True)
            assert (addy == s_address)
            if fInvalid == 2:
                # add a new output with 100 coins from the pot
                new_key = CECKey()
                new_key.set_secretbytes(hash256(pack('<I', 0xffff)))
                pubkey = new_key.get_pubkey()
                stake_tx_unsigned.vout.append(
                    CTxOut(100 * COIN, CScript([pubkey, OP_CHECKSIG])))
                stake_tx_unsigned.vout[1].nValue = outNValue - 100 * COIN

        # Sign coinstake TX and add it to the block
        stake_tx_signed_raw_hex = api.signrawtransaction(
            bytes_to_hex_str(stake_tx_unsigned.serialize()))['hex']
        stake_tx_signed = CTransaction()
        stake_tx_signed.deserialize(
            BytesIO(hex_str_to_bytes(stake_tx_signed_raw_hex)))
        block.vtx.append(stake_tx_signed)

        # Get correct MerkleRoot and rehash block
        block.hashMerkleRoot = block.calc_merkle_root()
        block.rehash()

        # sign block with block signing key and return it
        block.sign_block(block_sig_key)
        return block
        :param      block:           (CBlock) block with stake to sign
                    stake_in_value:  (int) staked amount
                    fZPoS:           (bool) zerocoin stake
        :return:    stake_tx_signed: (CTransaction) signed tx
        '''
        self.block_sig_key = CECKey()

        else:
            # Create a new private key and get the corresponding public key
            self.block_sig_key.set_secretbytes(hash256(pack('<I', 0xffff)))
            pubkey = self.block_sig_key.get_pubkey()
            # Create the raw stake TX (unsigned)
            scriptPubKey = CScript([pubkey, OP_CHECKSIG])
            outNValue = int(stake_in_value + 2*COIN)
            stake_tx_unsigned = CTransaction()
            stake_tx_unsigned.nTime = block.nTime
            stake_tx_unsigned.vin.append(CTxIn(block.prevoutStake))
            stake_tx_unsigned.vin[0].nSequence = 0xffffffff
            stake_tx_unsigned.vout.append(CTxOut())
            stake_tx_unsigned.vout.append(CTxOut(outNValue, scriptPubKey))
            # Sign the stake TX
            stake_tx_signed_raw_hex = self.node.signrawtransaction(bytes_to_hex_str(stake_tx_unsigned.serialize()))['hex']

        # Deserialize the signed raw tx into a CTransaction object and return it
        stake_tx_signed = CTransaction()
        stake_tx_signed.deserialize(BytesIO(hex_str_to_bytes(stake_tx_signed_raw_hex)))
        return stake_tx_signed


    def get_prevouts(self, utxo_list, blockHeight, zpos=False):
        ''' get prevouts (map) for each utxo in a list