// Copyright © 2017-2020 Trust Wallet.

//

// This file is part of Trust. The full Trust copyright notice, including

// terms governing use, modification, and redistribution, is contained in the

// file LICENSE at the root of the source code distribution tree.

#include "Transaction.h"

#include "Signer.h"

#include "../BinaryCoding.h"

#include "../HexCoding.h"

#include "../PublicKey.h"

using namespace TW;

using namespace TW::Nimiq;

const uint8_t NETWORK_ID = 42;

const uint8_t EMPTY_FLAGS = 0;

std::vector<uint8_t> Transaction::serialize() const {

std::vector<uint8_t> data;

data.push_back(0x00); // Basic TX type

data.insert(data.end(), sender_pub_key.begin(), sender_pub_key.end());

data.insert(data.end(), destination.bytes.begin(), destination.bytes.end());

encode64BE(amount, data);

encode64BE(fee, data);

encode32BE(vsh, data);

data.push_back(NETWORK_ID);

data.insert(data.end(), signature.begin(), signature.end());

return data;

}

std::vector<uint8_t> Transaction::getPreImage() const {

std::vector<uint8_t> data;

// Build pre-image

Address sender(Signer::publicKeyFromBytes(sender_pub_key));

encode16BE(0x00, data); // Data size (+ 0 bytes of data)

data.insert(data.end(), sender.bytes.begin(), sender.bytes.end());

data.push_back(0); // Sender is basic account type

data.insert(data.end(), destination.bytes.begin(), destination.bytes.end());

data.push_back(0); // Recipient is basic account type

encode64BE(amount, data);

encode64BE(fee, data);

encode32BE(vsh, data);

data.push_back(NETWORK_ID);

data.push_back(EMPTY_FLAGS);

return data;

}