// 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 "Signer.h"

#include "Address.h"

#include "../PublicKey.h"

using namespace TW;

using namespace TW::Algorand;

const Data TRANSACTION_TAG = {84, 88};

const std::string TRANSACTION_PAY = "pay";

Proto::SigningOutput Signer::sign(const Proto::SigningInput &input) noexcept {

auto protoOutput = Proto::SigningOutput();

auto key = PrivateKey(Data(input.private_key().begin(), input.private_key().end()));

auto pubkey = key.getPublicKey(TWPublicKeyTypeED25519);

auto from = Address(pubkey);

auto note = Data(input.note().begin(), input.note().end());

auto genesisId = input.genesis_id();

auto genesisHash = Data(input.genesis_hash().begin(), input.genesis_hash().end());

if (input.has_transaction_pay()) {

auto message = input.transaction_pay();

auto to = Address(message.to_address());

auto transaction = Transaction(from, to, message.fee(), message.amount(), message.first_round(),

message.last_round(), note, TRANSACTION_PAY, genesisId, genesisHash);

auto signature = sign(key, transaction);

auto serialized = transaction.serialize(signature);

protoOutput.set_encoded(serialized.data(), serialized.size());

}

return protoOutput;

}

Data Signer::sign(const PrivateKey &privateKey, Transaction &transaction) noexcept {

Data data;

append(data, TRANSACTION_TAG);

append(data, transaction.serialize());

auto signature = privateKey.sign(data, TWCurveED25519);

return Data(signature.begin(), signature.end());

}