#include "TxInput.h"
#include "VarInt.h"
#include <algorithm>
#include <iostream>

TxInput::TxInput(const std::byte *data) {
    std::copy_n(data, _txId.size(), _txId.begin());
    data += _txId.size();
    _vOut = *reinterpret_cast<const uint32_t*>(data);
    data += sizeof(_vOut);
    VarInt scriptSigSize(data);
    data += scriptSigSize.size();

    //std::cout << "=== Creating signature script of size: " << scriptSigSize.value() << std::endl;
    _signatureScript = std::make_unique<Script>(std::span((uint8_t*)data, scriptSigSize.value()));
    data += scriptSigSize.value();

    _sequence = *reinterpret_cast<const uint32_t*>(data);
    _size = _txId.size() + sizeof(_vOut) + scriptSigSize.size() + scriptSigSize.value() + sizeof(_sequence);
}

size_t TxInput::size() const {
    return _size;
}