Exemplo n.º 1
0
    def from_bytes(b):
        """ Creates a BlockHeader object from a serialized
        bytestream. This function "eats" the bytestream and
        returns the remainder of the stream after deserializing
        the fields of the BlockHeader.

        Args:
            b (bytes): bytes beginning with the (4-byte) version.

        Returns:
            bh, b (tuple): A tuple containing two elements - a BlockHeader object
            and the remainder of the bytestream after deserialization.
        """
        version, b = unpack_u32(b)
        prev_block_hash, b = Hash(b[0:32]), b[32:]
        merkle_root_hash, b = Hash(b[0:32]), b[32:]
        time, b = unpack_u32(b)
        bits, b = unpack_u32(b)
        nonce, b = unpack_u32(b)

        return (
            BlockHeader(version,
                        prev_block_hash,
                        merkle_root_hash,
                        time,
                        bits,
                        nonce),
            b
        )
Exemplo n.º 2
0
    def from_bytes(b):
        """ Creates a BlockHeader object from a serialized
        bytestream. This function "eats" the bytestream and
        returns the remainder of the stream after deserializing
        the fields of the BlockHeader.

        Args:
            b (bytes): bytes beginning with the (4-byte) version.

        Returns:
            bh, b (tuple): A tuple containing two elements - a BlockHeader object
            and the remainder of the bytestream after deserialization.
        """
        version, b = unpack_u32(b)
        prev_block_hash, b = Hash(b[0:32]), b[32:]
        merkle_root_hash, b = Hash(b[0:32]), b[32:]
        time, b = unpack_u32(b)
        bits, b = unpack_u32(b)
        nonce, b = unpack_u32(b)

        return (
            BlockHeader(version,
                        prev_block_hash,
                        merkle_root_hash,
                        time,
                        bits,
                        nonce),
            b
        )
Exemplo n.º 3
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    def from_bytes(b):
        """ Deserializes a byte stream into a TransactionInput.

        Args:
            b (bytes): byte stream starting with the outpoint.

        Returns:
            tuple: First element of the tuple is the TransactionInput
                   object and the second is the remaining byte stream.
        """
        outpoint = b[0:32]
        outpoint_index, b1 = unpack_u32(b[32:])
        script, b1 = Script.from_bytes(b1)
        sequence_num, b1 = unpack_u32(b1)

        return (TransactionInput(Hash(outpoint), outpoint_index, script, sequence_num), b1)
Exemplo n.º 4
0
    def from_bytes(b):
        """ Deserializes a byte stream into a TransactionInput.

        Args:
            b (bytes): byte stream starting with the outpoint.

        Returns:
            tuple: First element of the tuple is the TransactionInput
                   object and the second is the remaining byte stream.
        """
        outpoint = b[0:32]
        outpoint_index, b1 = unpack_u32(b[32:])
        script, b1 = Script.from_bytes(b1)
        sequence_num, b1 = unpack_u32(b1)

        return (TransactionInput(Hash(outpoint), outpoint_index, script,
                                 sequence_num), b1)