// 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 "Hash.h"

#include "HexCoding.h"

#include "PrivateKey.h"

#include "Signer.h"

using namespace TW;

using namespace TW::IoTeX;

Data Signer::sign() const {

auto key = PrivateKey(input.privatekey());

return key.sign(hash(), TWCurveSECP256k1);

}

Proto::SigningOutput Signer::build() const {

auto signedAction = IoTeX::Proto::Action();

signedAction.mutable_core()->MergeFrom(action);

auto key = PrivateKey(input.privatekey());

auto pk = key.getPublicKey(TWPublicKeyTypeSECP256k1Extended).bytes;

signedAction.set_senderpubkey(pk.data(), pk.size());

auto sig = key.sign(hash(), TWCurveSECP256k1);

signedAction.set_signature(sig.data(), sig.size());

auto output = IoTeX::Proto::SigningOutput();

auto serialized = signedAction.SerializeAsString();

output.set_encoded(serialized);

auto h = Hash::keccak256(serialized);

output.set_hash(h.data(), h.size());

return output;

}

Data Signer::hash() const {

return Hash::keccak256(action.SerializeAsString());

}

void Signer::toActionCore() {

// ActionCore is same as SigningInput, except missing field privateKey = 5;

// we could leverage this and directly load SigningInput proto msg into ActionCore

action.ParseFromString(input.SerializeAsString());

action.DiscardUnknownFields();

}