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// 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 "../Ethereum/RLP.h"
#include "../HexCoding.h"
using namespace TW;
using namespace TW::Harmony;
std::tuple<uint256_t, uint256_t, uint256_t> Signer::values(const uint256_t &chainID,
const Data &signature) noexcept {
auto r = load(Data(signature.begin(), signature.begin() + 32));
auto s = load(Data(signature.begin() + 32, signature.begin() + 64));
auto v = load(Data(signature.begin() + 64, signature.begin() + 65));
v += 35 + chainID + chainID;
return std::make_tuple(r, s, v);
}
std::tuple<uint256_t, uint256_t, uint256_t>
Signer::sign(const uint256_t &chainID, const PrivateKey &privateKey, const Data &hash) noexcept {
auto signature = privateKey.sign(hash, TWCurveSECP256k1);
return values(chainID, signature);
}
template <typename T>
Proto::SigningOutput Signer::prepareOutput(const Data &encoded, const T &transaction) noexcept {
auto protoOutput = Proto::SigningOutput();
auto v = store(transaction.v);
auto r = store(transaction.r);
auto s = store(transaction.s);
protoOutput.set_encoded(encoded.data(), encoded.size());
protoOutput.set_v(v.data(), v.size());
protoOutput.set_r(r.data(), r.size());
protoOutput.set_s(s.data(), s.size());
return protoOutput;
}
Proto::SigningOutput Signer::sign(const Proto::SigningInput &input) noexcept {
if (input.has_transaction_message()) {
return signTransaction(input);
}
if (input.has_staking_message()) {
Harmony::Proto::StakingMessage stakingMessage = input.staking_message();
if (stakingMessage.has_create_validator_message()) {
return signCreateValidator(input);
}
if (stakingMessage.has_edit_validator_message()) {
return signEditValidator(input);
}
if (stakingMessage.has_delegate_message()) {
return signDelegate(input);
}
if (stakingMessage.has_undelegate_message()) {
return signUndelegate(input);
}
if (stakingMessage.has_collect_rewards()) {
return signCollectRewards(input);
}
}
return Proto::SigningOutput();
}
Proto::SigningOutput Signer::signTransaction(const Proto::SigningInput &input) noexcept {
auto key = PrivateKey(Data(input.private_key().begin(), input.private_key().end()));
Address toAddr;
if (!Address::decode(input.transaction_message().to_address(), toAddr)) {
// invalid to address
return Proto::SigningOutput();
}
auto transaction = Transaction(
/* nonce: */ load(input.transaction_message().nonce()),
/* gasPrice: */ load(input.transaction_message().gas_price()),
/* gasLimit: */ load(input.transaction_message().gas_limit()),
/* fromShardID */ load(input.transaction_message().from_shard_id()),
/* toShardID */ load(input.transaction_message().to_shard_id()),
/* to: */ toAddr,
/* amount: */ load(input.transaction_message().amount()),
/* payload: */
Data(input.transaction_message().payload().begin(),
input.transaction_message().payload().end()));
auto signer = Signer(uint256_t(load(input.chain_id())));
auto hash = signer.hash(transaction);
signer.sign(key, hash, transaction);
auto protoOutput = Proto::SigningOutput();
auto encoded = signer.rlpNoHash(transaction, true);
return prepareOutput<Transaction>(encoded, transaction);
}
Proto::SigningOutput Signer::signCreateValidator(const Proto::SigningInput &input) noexcept {
auto key = PrivateKey(Data(input.private_key().begin(), input.private_key().end()));
auto description = Description(
/* name */ input.staking_message().create_validator_message().description().name(),
/* identity */ input.staking_message().create_validator_message().description().identity(),
/* website */ input.staking_message().create_validator_message().description().website(),
/* securityContact */
input.staking_message().create_validator_message().description().security_contact(),
/* details */ input.staking_message().create_validator_message().description().details());
auto rate = Decimal(
/* value */ load(
input.staking_message().create_validator_message().commission_rates().rate().value()),
load(input.staking_message()
.create_validator_message()
.commission_rates()
.rate()
.precision()));
auto maxRate = Decimal(
/* value */
load(input.staking_message()
.create_validator_message()
.commission_rates()
.max_rate()
.value()),
load(input.staking_message()
.create_validator_message()
.commission_rates()
.max_rate()
.precision()));
auto maxChangeRate = Decimal(
/* value */
load(input.staking_message()
.create_validator_message()
.commission_rates()
.max_change_rate()
.value()),
load(input.staking_message()
.create_validator_message()
.commission_rates()
.max_change_rate()
.precision()));
auto commissionRates = CommissionRate(rate, maxRate, maxChangeRate);
std::vector<Data> slotPubKeys;
for (auto pk : input.staking_message().create_validator_message().slot_pub_keys()) {
slotPubKeys.push_back(Data(pk.begin(), pk.end()));
}
Address validatorAddr;
if (!Address::decode(input.staking_message().create_validator_message().validator_address(),
validatorAddr)) {
// invalid to address
return Proto::SigningOutput();
}
auto createValidator = CreateValidator(
/* ValidatorAddress */ validatorAddr,
/* Description */ description,
/* Commission */ commissionRates,
/* MinSelfDelegation */
load(input.staking_message().create_validator_message().min_self_delegation()),
/* MaxTotalDelegation */
load(input.staking_message().create_validator_message().max_total_delegation()),
/* PubKey */ slotPubKeys,
/* Amount */ load(input.staking_message().create_validator_message().amount()));
auto stakingTx = Staking<CreateValidator>(
DirectiveCreateValidator, createValidator, load(input.staking_message().nonce()),
load(input.staking_message().gas_price()), load(input.staking_message().gas_limit()),
load(input.chain_id()), 0, 0);
auto signer = Signer(uint256_t(load(input.chain_id())));
auto hash = signer.hash<CreateValidator>(stakingTx);
signer.sign(key, hash, stakingTx);
auto encoded = signer.rlpNoHash<CreateValidator>(stakingTx, true);
return prepareOutput<Staking<CreateValidator>>(encoded, stakingTx);
}
Proto::SigningOutput Signer::signEditValidator(const Proto::SigningInput &input) noexcept {
auto key = PrivateKey(Data(input.private_key().begin(), input.private_key().end()));
auto description = Description(
/* name */ input.staking_message().edit_validator_message().description().name(),
/* identity */ input.staking_message().edit_validator_message().description().identity(),
/* website */ input.staking_message().edit_validator_message().description().website(),
/* securityContact */
input.staking_message().edit_validator_message().description().security_contact(),
/* details */ input.staking_message().edit_validator_message().description().details());
Decimal *commissionRate = nullptr;
if (input.staking_message().edit_validator_message().has_commission_rate()) {
Decimal decimal = Decimal(
/* value */ load(
input.staking_message().edit_validator_message().commission_rate().value()),
load(input.staking_message().edit_validator_message().commission_rate().precision()));
commissionRate = &decimal;
}
Address validatorAddr;
if (!Address::decode(input.staking_message().edit_validator_message().validator_address(),
validatorAddr)) {
// invalid to address
return Proto::SigningOutput();
}
auto editValidator = EditValidator(
/* ValidatorAddress */ validatorAddr,
/* Description */ description,
/* CommissionRate */ commissionRate,
/* MinSelfDelegation */
load(input.staking_message().edit_validator_message().min_self_delegation()),
/* MaxTotalDelegation */
load(input.staking_message().edit_validator_message().max_total_delegation()),
/* SlotKeyToRemove */
Data(input.staking_message().edit_validator_message().slot_key_to_remove().begin(),
input.staking_message().edit_validator_message().slot_key_to_remove().end()),
/* SlotKeyToRemove */
Data(input.staking_message().edit_validator_message().slot_key_to_add().begin(),
input.staking_message().edit_validator_message().slot_key_to_add().end()));
auto stakingTx = Staking<EditValidator>(
DirectiveEditValidator, editValidator, load(input.staking_message().nonce()),
load(input.staking_message().gas_price()), load(input.staking_message().gas_limit()),
load(input.chain_id()), 0, 0);
auto signer = Signer(uint256_t(load(input.chain_id())));
auto hash = signer.hash<EditValidator>(stakingTx);
signer.sign(key, hash, stakingTx);
auto encoded = signer.rlpNoHash<EditValidator>(stakingTx, true);
return prepareOutput<Staking<EditValidator>>(encoded, stakingTx);
}
Proto::SigningOutput Signer::signDelegate(const Proto::SigningInput &input) noexcept {
auto key = PrivateKey(Data(input.private_key().begin(), input.private_key().end()));
Address delegatorAddr;
if (!Address::decode(input.staking_message().delegate_message().delegator_address(),
delegatorAddr)) {
// invalid to address
return Proto::SigningOutput();
}
Address validatorAddr;
if (!Address::decode(input.staking_message().delegate_message().validator_address(),
validatorAddr)) {
// invalid to address
return Proto::SigningOutput();
}
auto delegate = Delegate(delegatorAddr, validatorAddr,
load(input.staking_message().delegate_message().amount()));
auto stakingTx =
Staking<Delegate>(DirectiveDelegate, delegate, load(input.staking_message().nonce()),
load(input.staking_message().gas_price()),
load(input.staking_message().gas_limit()), load(input.chain_id()), 0, 0);
auto signer = Signer(uint256_t(load(input.chain_id())));
auto hash = signer.hash<Delegate>(stakingTx);
signer.sign(key, hash, stakingTx);
auto encoded = signer.rlpNoHash<Delegate>(stakingTx, true);
return prepareOutput<Staking<Delegate>>(encoded, stakingTx);
}
Proto::SigningOutput Signer::signUndelegate(const Proto::SigningInput &input) noexcept {
auto key = PrivateKey(Data(input.private_key().begin(), input.private_key().end()));
Address delegatorAddr;
if (!Address::decode(input.staking_message().undelegate_message().delegator_address(),
delegatorAddr)) {
// invalid to address
return Proto::SigningOutput();
}
Address validatorAddr;
if (!Address::decode(input.staking_message().undelegate_message().validator_address(),
validatorAddr)) {
// invalid to address
return Proto::SigningOutput();
}
auto undelegate = Undelegate(delegatorAddr, validatorAddr,
load(input.staking_message().undelegate_message().amount()));
auto stakingTx = Staking<Undelegate>(
DirectiveUndelegate, undelegate, load(input.staking_message().nonce()),
load(input.staking_message().gas_price()), load(input.staking_message().gas_limit()),
load(input.chain_id()), 0, 0);
auto signer = Signer(uint256_t(load(input.chain_id())));
auto hash = signer.hash<Undelegate>(stakingTx);
signer.sign(key, hash, stakingTx);
auto encoded = signer.rlpNoHash<Undelegate>(stakingTx, true);
return prepareOutput<Staking<Undelegate>>(encoded, stakingTx);
}
Proto::SigningOutput Signer::signCollectRewards(const Proto::SigningInput &input) noexcept {
auto key = PrivateKey(Data(input.private_key().begin(), input.private_key().end()));
Address delegatorAddr;
if (!Address::decode(input.staking_message().collect_rewards().delegator_address(),
delegatorAddr)) {
// invalid to address
return Proto::SigningOutput();
}
auto collectRewards = CollectRewards(delegatorAddr);
auto stakingTx = Staking<CollectRewards>(
DirectiveCollectRewards, collectRewards, load(input.staking_message().nonce()),
load(input.staking_message().gas_price()), load(input.staking_message().gas_limit()),
load(input.chain_id()), 0, 0);
auto signer = Signer(uint256_t(load(input.chain_id())));
auto hash = signer.hash<CollectRewards>(stakingTx);
signer.sign(key, hash, stakingTx);
auto encoded = signer.rlpNoHash<CollectRewards>(stakingTx, true);
return prepareOutput<Staking<CollectRewards>>(encoded, stakingTx);
}
template <typename T>
void Signer::sign(const PrivateKey &privateKey, const Data &hash, T &transaction) const noexcept {
auto tuple = sign(chainID, privateKey, hash);
transaction.r = std::get<0>(tuple);
transaction.s = std::get<1>(tuple);
transaction.v = std::get<2>(tuple);
}
Data Signer::rlpNoHash(const Transaction &transaction, const bool include_vrs) const noexcept {
auto encoded = Data();
using namespace TW::Ethereum;
append(encoded, RLP::encode(transaction.nonce));
append(encoded, RLP::encode(transaction.gasPrice));
append(encoded, RLP::encode(transaction.gasLimit));
append(encoded, RLP::encode(transaction.fromShardID));
append(encoded, RLP::encode(transaction.toShardID));
append(encoded, RLP::encode(transaction.to.getKeyHash()));
append(encoded, RLP::encode(transaction.amount));
append(encoded, RLP::encode(transaction.payload));
if (include_vrs) {
append(encoded, RLP::encode(transaction.v));
append(encoded, RLP::encode(transaction.r));
append(encoded, RLP::encode(transaction.s));
} else {
append(encoded, RLP::encode(chainID));
append(encoded, RLP::encode(0));
append(encoded, RLP::encode(0));
}
return RLP::encodeList(encoded);
}
template <typename Directive>
Data Signer::rlpNoHash(const Staking<Directive> &transaction, const bool include_vrs) const
noexcept {
auto encoded = Data();
using namespace TW::Ethereum;
append(encoded, RLP::encode(transaction.directive));
append(encoded, rlpNoHashDirective(transaction));
append(encoded, RLP::encode(transaction.nonce));
append(encoded, RLP::encode(transaction.gasPrice));
append(encoded, RLP::encode(transaction.gasLimit));
if (include_vrs) {
append(encoded, RLP::encode(transaction.v));
append(encoded, RLP::encode(transaction.r));
append(encoded, RLP::encode(transaction.s));
} else {
append(encoded, RLP::encode(chainID));
append(encoded, RLP::encode(0));
append(encoded, RLP::encode(0));
}
return RLP::encodeList(encoded);
}
Data Signer::rlpNoHashDirective(const Staking<CreateValidator> &transaction) const noexcept {
auto encoded = Data();
using namespace TW::Ethereum;
append(encoded, RLP::encode(transaction.stakeMsg.validatorAddress.getKeyHash()));
auto descriptionEncoded = Data();
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.name));
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.identity));
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.website));
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.securityContact));
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.details));
append(encoded, RLP::encodeList(descriptionEncoded));
auto commissionEncoded = Data();
auto rateEncoded = Data();
append(rateEncoded, RLP::encode(transaction.stakeMsg.commissionRates.rate.value));
append(commissionEncoded, RLP::encodeList(rateEncoded));
auto maxRateEncoded = Data();
append(maxRateEncoded, RLP::encode(transaction.stakeMsg.commissionRates.maxRate.value));
append(commissionEncoded, RLP::encodeList(maxRateEncoded));
auto maxChangeRateEncoded = Data();
append(maxChangeRateEncoded,
RLP::encode(transaction.stakeMsg.commissionRates.maxChangeRate.value));
append(commissionEncoded, RLP::encodeList(maxChangeRateEncoded));
append(encoded, RLP::encodeList(commissionEncoded));
append(encoded, RLP::encode(transaction.stakeMsg.minSelfDelegation));
append(encoded, RLP::encode(transaction.stakeMsg.maxTotalDelegation));
auto slotPubKeysEncoded = Data();
for (auto pk : transaction.stakeMsg.slotPubKeys) {
append(slotPubKeysEncoded, RLP::encode(pk));
}
append(encoded, RLP::encodeList(slotPubKeysEncoded));
append(encoded, RLP::encode(transaction.stakeMsg.amount));
return RLP::encodeList(encoded);
}
Data Signer::rlpNoHashDirective(const Staking<EditValidator> &transaction) const noexcept {
auto encoded = Data();
using namespace TW::Ethereum;
append(encoded, RLP::encode(transaction.stakeMsg.validatorAddress.getKeyHash()));
auto descriptionEncoded = Data();
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.name));
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.identity));
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.website));
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.securityContact));
append(descriptionEncoded, RLP::encode(transaction.stakeMsg.description.details));
append(encoded, RLP::encodeList(descriptionEncoded));
auto decEncoded = Data();
if (transaction.stakeMsg.commissionRate != nullptr) {
append(decEncoded, RLP::encode(transaction.stakeMsg.commissionRate->value));
}
append(encoded, RLP::encodeList(decEncoded));
append(encoded, RLP::encode(transaction.stakeMsg.minSelfDelegation));
append(encoded, RLP::encode(transaction.stakeMsg.maxTotalDelegation));
append(encoded, RLP::encode(transaction.stakeMsg.slotKeyToRemove));
append(encoded, RLP::encode(transaction.stakeMsg.slotKeyToAdd));
return RLP::encodeList(encoded);
}
Data Signer::rlpNoHashDirective(const Staking<Delegate> &transaction) const noexcept {
auto encoded = Data();
using namespace TW::Ethereum;
append(encoded, RLP::encode(transaction.stakeMsg.delegatorAddress.getKeyHash()));
append(encoded, RLP::encode(transaction.stakeMsg.validatorAddress.getKeyHash()));
append(encoded, RLP::encode(transaction.stakeMsg.amount));
return RLP::encodeList(encoded);
}
Data Signer::rlpNoHashDirective(const Staking<Undelegate> &transaction) const noexcept {
auto encoded = Data();
using namespace TW::Ethereum;
append(encoded, RLP::encode(transaction.stakeMsg.delegatorAddress.getKeyHash()));
append(encoded, RLP::encode(transaction.stakeMsg.validatorAddress.getKeyHash()));
append(encoded, RLP::encode(transaction.stakeMsg.amount));
return RLP::encodeList(encoded);
}
Data Signer::rlpNoHashDirective(const Staking<CollectRewards> &transaction) const noexcept {
auto encoded = Data();
using namespace TW::Ethereum;
append(encoded, RLP::encode(transaction.stakeMsg.delegatorAddress.getKeyHash()));
return RLP::encodeList(encoded);
}
std::string Signer::txnAsRLPHex(Transaction &transaction) const noexcept {
return TW::hex(rlpNoHash(transaction, false));
}
template <typename Directive>
std::string Signer::txnAsRLPHex(Staking<Directive> &transaction) const noexcept {
return TW::hex(rlpNoHash<Directive>(transaction, false));
}
Data Signer::hash(const Transaction &transaction) const noexcept {
return Hash::keccak256(rlpNoHash(transaction, false));
}
template <typename Directive>
Data Signer::hash(const Staking<Directive> &transaction) const noexcept {
return Hash::keccak256(rlpNoHash<Directive>(transaction, false));
}