NAME
Bitcoin::Crypto::Transaction::ControlBlock - BIP341 Control blocks
SYNOPSIS
# get control block from Bitcoin::Crypto::Script::Tree and $public_key
# (tree must have a leaf with id => $leaf_id)
my $control_block = $tree->get_control_block($leaf_id, $public_key);
# get serialized form of the control block (used in taproot script path spending)
$control_block->to_serialized;DESCRIPTION
This module contains implementation of control blocks described in BIP341. These blocks are used by taproot and are necessary to build transactions using custom taproot scripts. Taproot outputs spent by scripts must have a serialized control block in their witness data (after the serialized script leaf data).
INTERFACE
Attributes
control_byte
Required in constructor.
This attribute contains a control byte in form of an integer.
public_key
Required in constructor.
This attribute contains an instance of Bitcoin::Crypto::Key::Public.
script_blocks
Required in constructor.
This attribute contains an array reference of bytestrings. It represents a path to build a merkle root for a tree. These blocks can be used in "from_path" in Bitcoin::Crypto::Script::Tree.
METHODS
new
$tree = $class->new(%args)Standard Moo constructor - see "Attributes".
from_serialized
$object = $class->from_serialized($bytestr)Standard deserialization method. Returns a new instance.
to_serialized
$bytestr = $object->to_serialized()Standard serialization method.
get_leaf_version
$leaf_version = $object->get_leaf_version()Returns a leaf version, which is equal to control_byte & 0xfe.