/ 
Bitcoin-Crypto-2.004
River stage one • 3 direct dependents • 5 total dependents
/ Bitcoin::Crypto::Transaction::Input

NAME

Bitcoin::Crypto::Transaction::Input - Bitcoin transaction input instance

SYNOPSIS

use Bitcoin::Crypto qw(btc_transaction);

my $tx = btc_transaction->new;

$tx->add_input(
	utxo => [$txid, $output_index],
);

print $tx->inputs->[0]->dump;

DESCRIPTION

This is an input instance implementation used in transactions. It is rarely interacted with directly.

INTERFACE

Attributes

utxo

An instance of Bitcoin::Crypto::Transaction::UTXO. Required.

Can also be passed an array reference of two parameters, which will be fed to "get" in Bitcoin::Crypto::Transaction::UTXO to fetch the UTXO instance.

Available in the constructor.

signature_script

The script used to unlock the coins from the UTXO.

By default, it is an empty script.

Available in the constructor.

writer: set_signature_script

sequence_no

Also known as nSequence in Bitcoin Core. The sequence number used in various applications. Non-negative integer.

By default, it is set to 0xffffffff (max_sequence_no in Bitcoin::Crypto::Constants).

Available in the constructor.

writer: set_sequence_no

witness

SegWit data for this input. It is an array reference of bytestrings. Note that each element in the witness must be a separate element in this array (concatenating the witness into one bytestring will not work as intended).

Empty by default.

Available in the constructor.

writer: set_witness

predicate: has_witness

Methods

new

$block = $class->new(%args)

This is a standard Moo constructor, which can be used to create the object. It takes arguments specified in "Attributes".

Returns class instance.

to_serialized

$bytestring = $object->to_serialized()

Returns the serialized input data to be included into a serialized transaction.

NOTE: serialized input does not include witness data, which is a part of this class.

from_serialized

$object = $class->from_serialized($bytestring, %params)

Creates an object instance from serialized data.

%params can be any of:

  • pos

    Position for partial string decoding. Optional. If passed, must be a scalar reference to an integer value.

    This integer will mark the starting position of $bytestring from which to start decoding. It will be set to the next byte after end of input stream.

is_segwit

$boolean = $object->is_segwit()

Returns true if this input represents a segwit output.

For scripts which have signature_script filled out, this method is able to detect both native and compatibility segwit outputs (unlike "is_native_segwit" in Bitcoin::Crypto::Script).

prevout

$bytestring = $object->prevout()

Returns a bytestring with prevout data ready to be encoded in places like digest preimages. Mostly used internally.

script_base

$script = $object->script_base()

Returns a base script for the digest. Mostly used internally.

dump

$text = $object->dump()

Returns a readable description of the input.

EXCEPTIONS

This module throws an instance of Bitcoin::Crypto::Exception if it encounters an error. It can produce the following error types from the Bitcoin::Crypto::Exception namespace:

  • Transaction - general error with transaction

SEE ALSO

Bitcoin::Crypto::Transaction
Bitcoin::Crypto::Transaction::UTXO