bindings/python/src/transaction.c

	// Copyright (c) 2025-present The Bitcoin Core developers
	// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#include "transaction.h"

	#include <btck/btck.h>

	#include "_slice.h"
	#include "transaction_output.h"

	struct Self
	{
	PyObject_HEAD
	struct btck_Transaction* impl;
	};

	static void dealloc(struct Self* self);
	static PyObject* new(PyTypeObject* type, PyObject* args, PyObject* kwargs);
	static Py_ssize_t length(struct Self const* self);
	static PyObject* item(struct Self* self, Py_ssize_t idx);

	static PySequenceMethods as_sequence = {
	.sq_length = (lenfunc)length,
	.sq_item = (ssizeargfunc)item,
	};

	static PyMappingMethods as_mapping = {
	.mp_length = (lenfunc)length,
	.mp_subscript = Slice_subscript,
	};

	PyTypeObject Transaction_Type = {
	PyVarObject_HEAD_INIT(NULL, 0)
	.tp_name = "btck.Transaction",
	.tp_doc = "Transaction object",
	.tp_basicsize = sizeof(struct Self),
	.tp_dealloc = (destructor)dealloc,
	.tp_flags = Py_TPFLAGS_DEFAULT,
	.tp_new = new,
	.tp_as_sequence = &as_sequence,
	.tp_as_mapping = &as_mapping,
	};

	static void dealloc(struct Self* self)
	{
	btck_Transaction_Release(self->impl);
	Py_TYPE(self)->tp_free((PyObject*)self);
	}

	static PyObject* new(PyTypeObject* Py_UNUSED(type), PyObject* args, PyObject* kwargs)
	{
	static char* kwlist[] = {"raw", NULL};

	Py_buffer buffer;
	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y*", kwlist, &buffer)) {
	return NULL;
	}

	return Transaction_New(btck_Transaction_New(buffer.buf, buffer.len));
	}

	static Py_ssize_t length(struct Self const* self)
	{
	return (Py_ssize_t)btck_Transaction_GetSize(self->impl);
	}

	static PyObject* item(struct Self* self, Py_ssize_t idx)
	{
	if (idx < 0 \|\| idx >= length(self)) {
	PyErr_SetString(PyExc_IndexError, "index out of range");
	return NULL;
	}
	return TransactionOutput_New(btck_Transaction_At(self->impl, idx));
	}

	PyObject* Transaction_New(struct btck_Transaction* tx)
	{
	struct Self* self = PyObject_New(struct Self, &Transaction_Type);
	if (self == NULL) {
	btck_Transaction_Release(tx);
	return NULL;
	}
	self->impl = tx;
	return (PyObject*)self;
	}

	struct btck_Transaction* Transaction_GetImpl(PyObject* object)
	{
	assert(PyObject_TypeCheck(object, &Transaction_Type));
	return ((struct Self*)object)->impl;
	}

btck