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validator-session.cpp
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/*
This file is part of TON Blockchain Library.
TON Blockchain Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
TON Blockchain Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
Copyright 2017-2020 Telegram Systems LLP
*/
#include "validator-session.hpp"
#include "td/utils/Random.h"
#include "td/utils/crypto.h"
#include "candidate-serializer.h"
#include "td/utils/overloaded.h"
#include "ton/ton-tl.hpp"
namespace ton {
namespace validatorsession {
void ValidatorSessionImpl::process_blocks(std::vector<catchain::CatChainBlock *> blocks) {
VLOG(VALIDATOR_SESSION_DEBUG) << this << ": processing " << blocks.size() << " blocks";
requested_new_block_ = false;
requested_new_block_now_ = false;
for (auto block : blocks) {
auto e = dynamic_cast<const BlockExtra *>(block->extra());
CHECK(e != nullptr);
real_state_ = ValidatorSessionState::merge(description(), real_state_, e->get_ref());
}
if (real_state_->cur_round_seqno() != cur_round_) {
on_new_round(real_state_->cur_round_seqno());
}
[[maybe_unused]] td::uint32 cnt = 0;
auto ts = description().get_ts();
auto att = description().get_attempt_seqno(ts);
std::vector<tl_object_ptr<ton_api::validatorSession_round_Message>> msgs;
if (generated_ && !sent_generated_) {
auto it = blocks_.find(generated_block_);
CHECK(it != blocks_.end());
auto &B = it->second;
auto file_hash = sha256_bits256(B->data_);
auto collated_data_file_hash = sha256_bits256(B->collated_data_);
msgs.emplace_back(create_tl_object<ton_api::validatorSession_message_submittedBlock>(
cur_round_, B->root_hash_, file_hash, collated_data_file_hash));
cnt++;
sent_generated_ = true;
}
auto to_approve = real_state_->choose_blocks_to_approve(description(), local_idx());
for (auto &block : to_approve) {
auto id = SentBlock::get_block_id(block);
if (approved_.count(id) && approved_[id].first <= td::Clocks::system()) {
msgs.emplace_back(create_tl_object<ton_api::validatorSession_message_approvedBlock>(
cur_round_, id, approved_[id].second.clone()));
cnt++;
}
}
for (auto &B : pending_reject_) {
msgs.emplace_back(
create_tl_object<ton_api::validatorSession_message_rejectedBlock>(cur_round_, B.first, std::move(B.second)));
}
pending_reject_.clear();
if (signed_) {
bool found = false;
auto B = real_state_->choose_block_to_sign(description(), local_idx(), found);
if (found) {
CHECK(SentBlock::get_block_id(B) == signed_block_);
msgs.emplace_back(
create_tl_object<ton_api::validatorSession_message_commit>(cur_round_, signed_block_, std::move(signature_)));
cnt++;
}
}
for (auto &msg : msgs) {
VLOG(VALIDATOR_SESSION_INFO) << this << ": applying action: " << msg.get();
stats_process_action(local_idx(), *msg);
real_state_ = ValidatorSessionState::action(description(), real_state_, local_idx(), att, msg.get());
}
if (real_state_->check_need_generate_vote_for(description(), local_idx(), att)) {
VLOG(VALIDATOR_SESSION_INFO) << this << ": generating VOTEFOR";
auto msg = real_state_->generate_vote_for(description(), local_idx(), att);
CHECK(msg);
real_state_ = ValidatorSessionState::action(description(), real_state_, local_idx(), att, msg.get());
msgs.push_back(std::move(msg));
}
while (true) {
auto msg = real_state_->create_action(description(), local_idx(), att);
bool stop = false;
if (msg->get_id() == ton_api::validatorSession_message_empty::ID) {
stop = true;
}
VLOG(VALIDATOR_SESSION_INFO) << this << ": applying action: " << msg.get();
real_state_ = ValidatorSessionState::action(description(), real_state_, local_idx(), att, msg.get());
msgs.emplace_back(std::move(msg));
cnt++;
if (stop) {
break;
}
}
real_state_ = ValidatorSessionState::move_to_persistent(description(), real_state_);
VLOG(VALIDATOR_SESSION_DEBUG) << this << ": created block: root_hash=" << real_state_->get_hash(description());
auto payload = create_tl_object<ton_api::validatorSession_blockUpdate>(ts, std::move(msgs),
real_state_->get_hash(description()));
td::actor::send_closure(catchain_, &catchain::CatChain::processed_block, serialize_tl_object(payload, true));
auto round = real_state_->cur_round_seqno();
if (round > cur_round_) {
on_new_round(round);
}
virtual_state_ = ValidatorSessionState::merge(description(), virtual_state_, real_state_);
virtual_state_ = ValidatorSessionState::move_to_persistent(description(), virtual_state_);
description().clear_temp_memory();
}
void ValidatorSessionImpl::finished_processing() {
if (virtual_state_->get_hash(description()) != real_state_->get_hash(description())) {
VLOG(VALIDATOR_SESSION_WARNING) << this << ": hash mismatch (maybe some node blamed)";
}
virtual_state_ = real_state_;
check_all();
}
void ValidatorSessionImpl::preprocess_block(catchain::CatChainBlock *block) {
auto start_time = td::Timestamp::now();
td::PerfWarningTimer p_timer{"Loong block preprocess", 0.1};
td::PerfWarningTimer q_timer{"Looong block preprocess", 0.1};
auto prev = block->prev();
const ValidatorSessionState *state;
if (prev) {
auto e = dynamic_cast<const BlockExtra *>(prev->extra());
CHECK(e != nullptr);
state = e->get_ref();
} else {
state = ValidatorSessionState::create(description());
}
auto deps = block->deps();
for (auto b : deps) {
auto e = dynamic_cast<const BlockExtra *>(b->extra());
CHECK(e != nullptr);
state = ValidatorSessionState::merge(description(), state, e->get_ref());
}
if (block->payload().size() != 0 || deps.size() != 0) {
auto R = fetch_tl_object<ton_api::validatorSession_blockUpdate>(block->payload().clone(), true);
if (!R.is_error()) {
auto B = R.move_as_ok();
auto att = description().get_attempt_seqno(B->ts_);
for (auto &msg : B->actions_) {
VLOG(VALIDATOR_SESSION_INFO) << this << "[node " << description().get_source_id(block->source()) << "][block "
<< block->hash() << "]: applying action " << msg.get();
stats_process_action(block->source(), *msg);
state = ValidatorSessionState::action(description(), state, block->source(), att, msg.get());
}
state = ValidatorSessionState::make_all(description(), state, block->source(), att);
if (state->get_hash(description()) != static_cast<td::uint32>(B->state_)) {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << description().get_source_id(block->source())
<< "][block " << block->hash()
<< "]: state hash mismatch: computed=" << state->get_hash(description())
<< " received=" << B->state_;
for (auto &msg : B->actions_) {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << description().get_source_id(block->source())
<< "][block " << block->hash() << "]: applied action " << msg.get();
}
}
} else {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << description().get_source_id(block->source()) << "][block "
<< block->hash() << "]: failed to parse: " << R.move_as_error();
state = ValidatorSessionState::make_all(description(), state, block->source(), state->get_ts(block->source()));
}
}
q_timer.reset();
state = ValidatorSessionState::move_to_persistent(description(), state);
block->set_extra(std::make_unique<BlockExtra>(state));
if (block->source() == local_idx() && !catchain_started_) {
real_state_ = state;
}
virtual_state_ = ValidatorSessionState::merge(description(), virtual_state_, state);
virtual_state_ = ValidatorSessionState::move_to_persistent(description(), virtual_state_);
description().clear_temp_memory();
if (real_state_->cur_round_seqno() != cur_round_) {
on_new_round(real_state_->cur_round_seqno());
}
check_all();
VLOG(VALIDATOR_SESSION_DEBUG) << this << ": preprocessed block " << block->hash() << " in "
<< static_cast<td::uint32>(1000 * (td::Timestamp::now().at() - start_time.at()))
<< "ms: state=" << state->get_hash(description());
}
bool ValidatorSessionImpl::ensure_candidate_unique(td::uint32 src_idx, td::uint32 round,
ValidatorSessionCandidateId block_id) {
auto it = src_round_candidate_[src_idx].find(round);
if (it != src_round_candidate_[src_idx].end() && it->second != block_id) {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << description_->get_source_adnl_id(src_idx) << "][candidate "
<< block_id << "]: this node already has candidate in round " << round;
return false;
}
src_round_candidate_[src_idx][round] = block_id;
return true;
}
void ValidatorSessionImpl::process_broadcast(PublicKeyHash src, td::BufferSlice data,
td::optional<ValidatorSessionCandidateId> expected_id,
bool is_overlay_broadcast) {
// Note: src is not necessarily equal to the sender of this message:
// If requested using get_broadcast_p2p, src is the creator of the block, sender possibly is some other node.
auto src_idx = description().get_source_idx(src);
td::Timer deserialize_timer;
auto R =
deserialize_candidate(data, compress_block_candidates_,
description().opts().max_block_size + description().opts().max_collated_data_size + 1024);
double deserialize_time = deserialize_timer.elapsed();
if (R.is_error()) {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << src << "][broadcast " << sha256_bits256(data.as_slice())
<< "]: failed to parse: " << R.move_as_error();
return;
}
auto candidate = R.move_as_ok();
if (PublicKeyHash{candidate->src_} != src) {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << src << "][broadcast " << sha256_bits256(data.as_slice())
<< "]: source mismatch";
return;
}
if (candidate->data_.size() > description().opts().max_block_size ||
candidate->collated_data_.size() > description().opts().max_collated_data_size) {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << src << "][broadcast " << sha256_bits256(data.as_slice())
<< "]: too big broadcast size=" << candidate->data_.size() << " "
<< candidate->collated_data_.size();
return;
}
auto file_hash = sha256_bits256(candidate->data_.as_slice());
auto collated_data_file_hash = sha256_bits256(candidate->collated_data_.as_slice());
auto block_round = static_cast<td::uint32>(candidate->round_);
auto block_id = description().candidate_id(src_idx, candidate->root_hash_, file_hash, collated_data_file_hash);
if (expected_id && expected_id.value() != block_id) {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << src << "][broadcast " << sha256_bits256(data.as_slice())
<< "]: id mismatch";
return;
}
auto stat = stats_get_candidate_stat(block_round, src, block_id);
if (stat) {
if (stat->block_status == ValidatorSessionStats::status_none) {
stat->block_status = ValidatorSessionStats::status_received;
}
if (stat->block_timestamp <= 0.0) {
stat->block_timestamp = td::Clocks::system();
}
stat->deserialize_time = deserialize_time;
stat->serialized_size = data.size();
stat->root_hash = candidate->root_hash_;
stat->file_hash = file_hash;
}
if ((td::int32)block_round < (td::int32)cur_round_ - MAX_PAST_ROUND_BLOCK ||
block_round >= cur_round_ + MAX_FUTURE_ROUND_BLOCK) {
VLOG(VALIDATOR_SESSION_NOTICE) << this << "[node " << src << "][broadcast " << block_id
<< "]: bad round=" << block_round << " cur_round" << cur_round_;
return;
}
auto it = blocks_.find(block_id);
if (it != blocks_.end()) {
it->second->round_ = std::max<td::uint32>(it->second->round_, block_round);
VLOG(VALIDATOR_SESSION_INFO) << this << "[node " << src << "][broadcast " << block_id << "]: duplicate";
return;
}
auto priority = description().get_node_priority(src_idx, block_round);
if (priority < 0) {
VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << src << "][broadcast " << block_id
<< "]: source is not allowed to generate blocks in this round";
return;
}
if (is_overlay_broadcast && !ensure_candidate_unique(src_idx, block_round, block_id)) {
return;
}
blocks_[block_id] = std::move(candidate);
VLOG(VALIDATOR_SESSION_WARNING) << this << ": received broadcast " << block_id;
if (block_round != cur_round_) {
return;
}
CHECK(!pending_approve_.count(block_id));
CHECK(!approved_.count(block_id));
CHECK(!pending_reject_.count(block_id));
CHECK(!rejected_.count(block_id));
auto v = virtual_state_->choose_blocks_to_approve(description(), local_idx());
for (auto &b : v) {
if (b && SentBlock::get_block_id(b) == block_id) {
try_approve_block(b);
break;
}
}
}
void ValidatorSessionImpl::process_message(PublicKeyHash src, td::BufferSlice data) {
}
void ValidatorSessionImpl::process_query(PublicKeyHash src, td::BufferSlice data,
td::Promise<td::BufferSlice> promise) {
if (!started_) {
promise.set_error(td::Status::Error(ErrorCode::notready, "not started"));
return;
}
auto F = fetch_tl_object<ton_api::validatorSession_downloadCandidate>(std::move(data), true);
if (F.is_error()) {
promise.set_error(F.move_as_error_prefix("validator session: cannot parse query: "));
return;
}
auto f = F.move_as_ok();
auto round_id = static_cast<td::uint32>(f->round_);
if (round_id > real_state_->cur_round_seqno()) {
promise.set_error(td::Status::Error(ErrorCode::notready, "too big round id"));
return;
}
const SentBlock *block = nullptr;
auto id = description().candidate_id(description().get_source_idx(PublicKeyHash{f->id_->src_}), f->id_->root_hash_,
f->id_->file_hash_, f->id_->collated_data_file_hash_);
if (round_id < real_state_->cur_round_seqno()) {
block = real_state_->get_committed_block(description(), round_id);
if (!block || SentBlock::get_block_id(block) != id) {
promise.set_error(td::Status::Error(ErrorCode::notready, "wrong block in old round"));
return;
}
} else {
CHECK(round_id == real_state_->cur_round_seqno());
bool found;
block = real_state_->get_block(description(), id, found);
if (!found || !block) {
promise.set_error(td::Status::Error(ErrorCode::notready, "wrong block"));
return;
}
if (!real_state_->check_block_is_approved_by(description(), local_idx(), id)) {
promise.set_error(td::Status::Error(ErrorCode::notready, "not approved block"));
return;
}
}
CHECK(block);
auto P = td::PromiseCreator::lambda([promise = std::move(promise), src = f->id_->src_, round_id,
compress = compress_block_candidates_](td::Result<BlockCandidate> R) mutable {
if (R.is_error()) {
promise.set_error(R.move_as_error_prefix("failed to get candidate: "));
} else {
auto c = R.move_as_ok();
auto obj = create_tl_object<ton_api::validatorSession_candidate>(src, round_id, c.id.root_hash, std::move(c.data),
std::move(c.collated_data));
promise.set_result(serialize_candidate(obj, compress));
}
});
callback_->get_approved_candidate(description().get_source_public_key(block->get_src_idx()), f->id_->root_hash_,
f->id_->file_hash_, f->id_->collated_data_file_hash_, std::move(P));
}
void ValidatorSessionImpl::candidate_decision_fail(td::uint32 round, ValidatorSessionCandidateId hash,
std::string result, td::uint32 src, td::BufferSlice proof,
double validation_time, bool validation_cached) {
auto stat = stats_get_candidate_stat(round, description().get_source_id(src), hash);
if (stat) {
stat->block_status = ValidatorSessionStats::status_rejected;
stat->comment = result;
stat->validation_time = validation_time;
stat->validated_at = td::Clocks::system();
stat->validation_cached = validation_cached;
}
if (round != cur_round_) {
return;
}
LOG(ERROR) << this << ": failed candidate " << hash << ": " << result;
pending_approve_.erase(hash);
if (result.size() > MAX_REJECT_REASON_SIZE) {
result.resize(MAX_REJECT_REASON_SIZE);
}
pending_reject_.emplace(hash, td::BufferSlice{result});
rejected_.insert(hash);
}
void ValidatorSessionImpl::candidate_decision_ok(td::uint32 round, ValidatorSessionCandidateId hash, RootHash root_hash,
FileHash file_hash, td::uint32 src, td::uint32 ok_from,
double validation_time, bool validation_cached) {
auto stat = stats_get_candidate_stat(round, description().get_source_id(src), hash);
if (stat) {
stat->block_status = ValidatorSessionStats::status_approved;
stat->comment = PSTRING() << "ts=" << ok_from;
stat->validation_time = validation_time;
stat->gen_utime = (double)ok_from;
stat->validated_at = td::Clocks::system();
stat->validation_cached = validation_cached;
}
if (round != cur_round_) {
return;
}
LOG(INFO) << this << ": approved candidate " << hash;
auto obj = create_tl_object<ton_api::ton_blockIdApprove>(root_hash, file_hash);
auto data = serialize_tl_object(obj, true);
auto P = td::PromiseCreator::lambda([SelfId = actor_id(this), print_id = print_id(), hash, ok_from,
round = cur_round_](td::Result<td::BufferSlice> R) {
if (R.is_error()) {
LOG(FATAL) << print_id << ": failed to sign: " << R.move_as_error();
} else {
td::actor::send_closure(SelfId, &ValidatorSessionImpl::candidate_approved_signed, round, hash, ok_from,
R.move_as_ok());
}
});
td::actor::send_closure(keyring_, &keyring::Keyring::sign_message, local_id(), std::move(data), std::move(P));
}
void ValidatorSessionImpl::candidate_approved_signed(td::uint32 round, ValidatorSessionCandidateId hash,
td::uint32 ok_from, td::BufferSlice signature) {
pending_approve_.erase(hash);
approved_[hash] = std::pair<td::uint32, td::BufferSlice>{ok_from, std::move(signature)};
if (ok_from <= td::Clocks::system()) {
request_new_block(false);
} else {
LOG(WARNING) << "too new block. ts=" << ok_from;
alarm_timestamp().relax(td::Timestamp::at_unix(ok_from));
}
}
void ValidatorSessionImpl::generated_block(td::uint32 round, ValidatorSessionCandidateId root_hash,
td::BufferSlice data, td::BufferSlice collated_data, double collation_time,
bool collation_cached) {
if (data.size() > description().opts().max_block_size ||
collated_data.size() > description().opts().max_collated_data_size) {
LOG(ERROR) << this << ": generated candidate is too big. Dropping. size=" << data.size() << " "
<< collated_data.size();
return;
}
auto file_hash = sha256_bits256(data.as_slice());
auto collated_data_file_hash = sha256_bits256(collated_data.as_slice());
auto block_id = description().candidate_id(local_idx(), root_hash, file_hash, collated_data_file_hash);
auto stat = stats_get_candidate_stat(round, local_id(), block_id);
if (stat) {
stat->block_status = ValidatorSessionStats::status_received;
stat->collation_time = collation_time;
stat->collated_at = td::Clocks::system();
stat->block_timestamp = td::Clocks::system();
stat->collation_cached = collation_cached;
stat->root_hash = root_hash;
stat->file_hash = file_hash;
}
if (round != cur_round_) {
return;
}
td::Timer serialize_timer;
auto b = create_tl_object<ton_api::validatorSession_candidate>(local_id().tl(), round, root_hash, std::move(data),
std::move(collated_data));
auto B = serialize_candidate(b, compress_block_candidates_).move_as_ok();
if (stat) {
stat->serialize_time = serialize_timer.elapsed();
stat->serialized_size = B.size();
}
td::actor::send_closure(catchain_, &catchain::CatChain::send_broadcast, std::move(B));
blocks_.emplace(block_id, std::move(b));
pending_generate_ = false;
generated_ = true;
generated_block_ = block_id;
request_new_block(true);
}
void ValidatorSessionImpl::signed_block(td::uint32 round, ValidatorSessionCandidateId hash, td::BufferSlice signature) {
if (round != cur_round_) {
return;
}
pending_sign_ = false;
signed_ = true;
signed_block_ = hash;
signature_ = std::move(signature);
request_new_block(false);
}
void ValidatorSessionImpl::alarm() {
alarm_timestamp() = td::Timestamp::never();
check_all();
}
void ValidatorSessionImpl::check_vote_for_slot(td::uint32 att) {
if (!catchain_started_) {
return;
}
if (!started_) {
return;
}
if (virtual_state_->check_need_generate_vote_for(description(), local_idx(), att)) {
request_new_block(false);
}
}
void ValidatorSessionImpl::check_generate_slot() {
if (!catchain_started_) {
return;
}
if (!generated_ && !pending_generate_ && started_) {
if (real_state_->check_block_is_sent_by(description(), local_idx())) {
generated_ = true;
sent_generated_ = true;
return;
}
auto priority = description().get_node_priority(local_idx(), cur_round_);
if (priority >= 0) {
auto t = td::Timestamp::at(round_started_at_.at() + description().get_delay(priority));
if (t.is_in_past()) {
pending_generate_ = true;
td::PerfWarningTimer timer{"too long block generation", 1.0};
auto P = td::PromiseCreator::lambda([SelfId = actor_id(this), print_id = print_id(), timer = std::move(timer),
round = cur_round_](td::Result<GeneratedCandidate> R) {
if (R.is_ok()) {
auto c = std::move(R.ok_ref().candidate);
td::actor::send_closure(SelfId, &ValidatorSessionImpl::generated_block, round, c.id.root_hash,
c.data.clone(), c.collated_data.clone(), timer.elapsed(), R.ok().is_cached);
} else {
LOG(WARNING) << print_id << ": failed to generate block candidate: " << R.move_as_error();
}
});
callback_->on_generate_slot(
BlockSourceInfo{cur_round_, first_block_round_, description().get_source_public_key(local_idx()), priority},
std::move(P));
} else {
alarm_timestamp().relax(t);
}
}
}
}
void ValidatorSessionImpl::try_approve_block(const SentBlock *block) {
auto block_id = SentBlock::get_block_id(block);
{
auto it = approved_.find(block_id);
if (it != approved_.end()) {
if (it->second.first <= td::Clocks::system()) {
request_new_block(false);
} else {
alarm_timestamp().relax(td::Timestamp::at_unix(it->second.first));
}
return;
}
}
if (pending_approve_.count(block_id) || rejected_.count(block_id)) {
return;
}
auto delay = block ? description().get_delay(description().get_node_priority(block->get_src_idx(), cur_round_))
: description().get_empty_block_delay();
auto T = td::Timestamp::at(round_started_at_.at() + delay);
if (!T.is_in_past()) {
alarm_timestamp().relax(T);
return;
}
if (block) {
if (!ensure_candidate_unique(block->get_src_idx(), cur_round_, SentBlock::get_block_id(block))) {
return;
}
auto T = td::Timestamp::at(round_started_at_.at() + description().get_delay(block->get_src_idx()) +
REQUEST_BROADCAST_P2P_DELAY);
auto it = blocks_.find(block_id);
if (it != blocks_.end()) {
it->second->round_ = std::max<td::uint32>(it->second->round_, cur_round_);
td::PerfWarningTimer timer{"too long block validation", 1.0};
auto &B = it->second;
auto stat = stats_get_candidate_stat(B->round_, PublicKeyHash{B->src_});
if (stat) {
// Can happen if block is cached from previous round
if (stat->block_status == ValidatorSessionStats::status_none) {
stat->block_status = ValidatorSessionStats::status_received;
}
if (stat->block_timestamp <= 0.0) {
stat->block_timestamp = td::Clocks::system();
}
stat->root_hash = B->root_hash_;
stat->file_hash = td::sha256_bits256(B->data_);
}
auto P = td::PromiseCreator::lambda([round = cur_round_, hash = block_id, root_hash = block->get_root_hash(),
file_hash = block->get_file_hash(), timer = std::move(timer),
src = block->get_src_idx(),
SelfId = actor_id(this)](td::Result<CandidateDecision> res) {
if (res.is_error()) {
LOG(ERROR) << "round " << round << " failed to validate candidate " << hash << ": " << res.move_as_error();
return;
}
auto R = res.move_as_ok();
if (R.is_ok()) {
td::actor::send_closure(SelfId, &ValidatorSessionImpl::candidate_decision_ok, round, hash, root_hash,
file_hash, src, R.ok_from(), timer.elapsed(), R.is_cached());
} else {
td::actor::send_closure(SelfId, &ValidatorSessionImpl::candidate_decision_fail, round, hash, R.reason(),
src, R.proof(), timer.elapsed(), R.is_cached());
}
});
pending_approve_.insert(block_id);
callback_->on_candidate(
BlockSourceInfo{cur_round_, first_block_round_, description().get_source_public_key(block->get_src_idx()),
description().get_node_priority(block->get_src_idx(), cur_round_)},
B->root_hash_, B->data_.clone(), B->collated_data_.clone(), std::move(P));
} else if (T.is_in_past()) {
if (!active_requests_.count(block_id)) {
auto v = virtual_state_->get_block_approvers(description(), block_id);
if (v.size() > 0) {
auto id = description().get_source_id(v[td::Random::fast(0, static_cast<td::int32>(v.size() - 1))]);
auto src_id = description().get_source_id(block->get_src_idx());
active_requests_.insert(block_id);
auto P = td::PromiseCreator::lambda(
[SelfId = actor_id(this), id, src_id, print_id = print_id(), hash = block_id, round = cur_round_,
candidate_id = SentBlock::get_block_id(block)](td::Result<td::BufferSlice> R) {
td::actor::send_closure(SelfId, &ValidatorSessionImpl::end_request, round, hash);
if (R.is_error()) {
VLOG(VALIDATOR_SESSION_WARNING) << print_id << ": failed to get candidate " << hash << " from " << id
<< ": " << R.move_as_error();
} else {
td::actor::send_closure(SelfId, &ValidatorSessionImpl::process_broadcast, src_id, R.move_as_ok(),
candidate_id, false);
}
});
get_broadcast_p2p(id, block->get_file_hash(), block->get_collated_data_file_hash(),
description().get_source_id(block->get_src_idx()), cur_round_, block->get_root_hash(),
std::move(P), td::Timestamp::in(15.0));
} else {
LOG(VALIDATOR_SESSION_DEBUG) << this << ": no nodes to download candidate " << block << " from";
}
}
} else {
alarm_timestamp().relax(T);
}
} else {
approved_[block_id] = std::pair<td::uint32, td::BufferSlice>{0, td::BufferSlice{}};
request_new_block(false);
}
}
void ValidatorSessionImpl::get_broadcast_p2p(PublicKeyHash node, ValidatorSessionFileHash file_hash,
ValidatorSessionCollatedDataFileHash collated_data_file_hash,
PublicKeyHash src, td::uint32 round, ValidatorSessionRootHash root_hash,
td::Promise<td::BufferSlice> promise, td::Timestamp timeout) {
if (timeout.is_in_past()) {
promise.set_error(td::Status::Error(ErrorCode::timeout, "timeout"));
return;
}
auto obj = create_tl_object<ton_api::validatorSession_downloadCandidate>(
round,
create_tl_object<ton_api::validatorSession_candidateId>(src.tl(), root_hash, file_hash, collated_data_file_hash));
td::actor::send_closure(
catchain_, &catchain::CatChain::send_query_via, node, "download candidate", std::move(promise), timeout,
serialize_tl_object(obj, true),
description().opts().max_block_size + description().opts().max_collated_data_size + MAX_CANDIDATE_EXTRA_SIZE,
rldp_);
}
void ValidatorSessionImpl::check_sign_slot() {
if (!catchain_started_) {
return;
}
if (pending_sign_ || !started_) {
return;
}
if (real_state_->check_block_is_signed_by(description(), local_idx())) {
signed_ = true;
return;
}
if (signed_) {
request_new_block(false);
return;
}
auto found = false;
auto B = virtual_state_->choose_block_to_sign(description(), local_idx(), found);
if (found) {
if (!B) {
signed_ = true;
signed_block_ = skip_round_candidate_id();
request_new_block(false);
} else {
pending_sign_ = true;
auto obj = create_tl_object<ton_api::ton_blockId>(B->get_root_hash(), B->get_file_hash());
auto data = serialize_tl_object(obj, true);
auto P =
td::PromiseCreator::lambda([SelfId = actor_id(this), print_id = print_id(), hash = SentBlock::get_block_id(B),
round = cur_round_](td::Result<td::BufferSlice> R) {
if (R.is_error()) {
LOG(FATAL) << print_id << ": failed to sign: " << R.move_as_error();
} else {
td::actor::send_closure(SelfId, &ValidatorSessionImpl::signed_block, round, hash, R.move_as_ok());
}
});
td::actor::send_closure(keyring_, &keyring::Keyring::sign_message, local_id(), std::move(data), std::move(P));
}
}
}
void ValidatorSessionImpl::check_approve() {
if (!catchain_started_) {
return;
}
if (!started_) {
return;
}
auto to_approve = virtual_state_->choose_blocks_to_approve(description(), local_idx());
for (auto &block : to_approve) {
try_approve_block(block);
}
}
void ValidatorSessionImpl::check_action(td::uint32 att) {
if (!catchain_started_) {
return;
}
if (!requested_new_block_) {
auto action = virtual_state_->create_action(description(), local_idx(), att);
if (action && action->get_id() != ton_api::validatorSession_message_empty::ID) {
request_new_block(false);
}
}
}
void ValidatorSessionImpl::check_all() {
if (!catchain_started_) {
return;
}
if (virtual_state_->cur_round_seqno() != cur_round_) {
request_new_block(false);
return;
}
if (round_debug_at_.is_in_past()) {
td::BufferSlice buf{10000};
td::StringBuilder sb{buf.as_slice()};
real_state_->dump_cur_attempt(description(), sb);
virtual_state_->dump_cur_attempt(description(), sb);
auto to_approve = virtual_state_->choose_blocks_to_approve(description(), local_idx());
sb << "to approve: \n";
for (auto &B : to_approve) {
if (B) {
auto block_id = SentBlock::get_block_id(B);
auto pending = pending_approve_.count(block_id) == 1;
auto rejected = rejected_.count(block_id) == 1;
auto accepted = approved_.count(block_id) == 1;
sb << " " << block_id << " pending: " << pending << " rejected: " << rejected << " accepted: " << accepted
<< "\n";
} else {
sb << " SKIP\n";
}
}
LOG(ERROR) << sb.as_cslice();
round_debug_at_ = td::Timestamp::in(60.0);
}
auto att = description().get_attempt_seqno(description().get_ts());
check_sign_slot();
check_approve();
check_generate_slot();
check_action(att);
check_vote_for_slot(att);
alarm_timestamp().relax(round_debug_at_);
alarm_timestamp().relax(description().attempt_start_at(att + 1));
}
void ValidatorSessionImpl::request_new_block(bool now) {
if (requested_new_block_now_) {
return;
}
if (!now && requested_new_block_) {
return;
}
requested_new_block_ = true;
if (now) {
requested_new_block_now_ = true;
td::actor::send_closure(catchain_, &catchain::CatChain::need_new_block, td::Timestamp::now());
} else {
double lambda = 10.0 / description().get_total_nodes();
double x = -1 / lambda * log(td::Random::fast(1, 999) * 0.001);
x = std::min(x, get_current_max_block_delay()); // default = 0.4
td::actor::send_closure(catchain_, &catchain::CatChain::need_new_block, td::Timestamp::in(x));
}
}
double ValidatorSessionImpl::get_current_max_block_delay() const {
td::uint32 att = real_state_->cur_attempt_in_round(*description_);
td::uint32 att1 = description_->opts().max_round_attempts;
if (att <= att1) {
return catchain_max_block_delay_;
}
td::uint32 att2 = att1 + 4;
if (att >= att2) {
return catchain_max_block_delay_slow_;
}
return catchain_max_block_delay_ +
(catchain_max_block_delay_slow_ - catchain_max_block_delay_) * (double)(att - att1) / (double)(att2 - att1);
}
void ValidatorSessionImpl::on_new_round(td::uint32 round) {
if (round != 0) {
CHECK(cur_round_ < round);
pending_generate_ = false;
generated_ = false;
sent_generated_ = false;
pending_approve_.clear();
rejected_.clear();
pending_reject_.clear();
approved_.clear();
pending_sign_ = false;
signed_ = false;
signature_ = td::BufferSlice{};
signed_block_ = skip_round_candidate_id();
active_requests_.clear();
}
while (cur_round_ < round) {
auto block = real_state_->get_committed_block(description(), cur_round_);
auto sigs = real_state_->get_committed_block_signatures(description(), cur_round_);
CHECK(sigs);
auto approve_sigs = real_state_->get_committed_block_approve_signatures(description(), cur_round_);
CHECK(approve_sigs);
std::vector<std::pair<PublicKeyHash, td::BufferSlice>> export_sigs;
ValidatorWeight signatures_weight = 0;
CHECK(sigs->size() == description().get_total_nodes());
for (td::uint32 i = 0; i < description().get_total_nodes(); i++) {
auto sig = sigs->at(i);
if (sig) {
CHECK(description().is_persistent(sig));
export_sigs.emplace_back(description().get_source_id(i), sig->value().clone());
signatures_weight += description().get_node_weight(i);
}
}
std::vector<std::pair<PublicKeyHash, td::BufferSlice>> export_approve_sigs;
ValidatorWeight approve_signatures_weight = 0;
CHECK(approve_sigs->size() == description().get_total_nodes());
for (td::uint32 i = 0; i < description().get_total_nodes(); i++) {
auto sig = approve_sigs->at(i);
if (sig) {
CHECK(description().is_persistent(sig));
export_approve_sigs.emplace_back(description().get_source_id(i), sig->value().clone());
approve_signatures_weight += description().get_node_weight(i);
}
}
auto it = blocks_.find(SentBlock::get_block_id(block));
bool have_block = (bool)block;
if (!have_block) {
callback_->on_block_skipped(cur_round_);
} else {
cur_stats_.success = true;
cur_stats_.timestamp = td::Clocks::system();
cur_stats_.signatures = (td::uint32)export_sigs.size();
cur_stats_.signatures_weight = signatures_weight;
cur_stats_.approve_signatures = (td::uint32)export_approve_sigs.size();
cur_stats_.approve_signatures_weight = approve_signatures_weight;
cur_stats_.creator = description().get_source_id(block->get_src_idx());
auto stat = stats_get_candidate_stat(cur_round_, cur_stats_.creator);
if (stat) {
stat->is_accepted = true;
}
auto stats = cur_stats_;
while (!stats.rounds.empty() && stats.rounds.size() + stats.first_round - 1 > cur_round_) {
stats.rounds.pop_back();
}
BlockSourceInfo source_info{cur_round_, first_block_round_,
description().get_source_public_key(block->get_src_idx()),
description().get_node_priority(block->get_src_idx(), cur_round_)};
if (it == blocks_.end()) {
callback_->on_block_committed(std::move(source_info), block->get_root_hash(), block->get_file_hash(),
td::BufferSlice(), std::move(export_sigs), std::move(export_approve_sigs),
std::move(stats));
} else {
callback_->on_block_committed(std::move(source_info), block->get_root_hash(), block->get_file_hash(),
it->second->data_.clone(), std::move(export_sigs), std::move(export_approve_sigs),
std::move(stats));
}
first_block_round_ = cur_round_ + 1;
}
cur_round_++;
if (have_block) {
stats_init();
} else {
size_t round_idx = cur_round_ - cur_stats_.first_round;
while (round_idx >= cur_stats_.rounds.size()) {
stats_add_round();
}
cur_stats_.rounds[round_idx].timestamp = td::Clocks::system();
}
auto it2 = blocks_.begin();
while (it2 != blocks_.end()) {
if (it2->second->round_ < (td::int32)cur_round_ - MAX_PAST_ROUND_BLOCK) {
it2 = blocks_.erase(it2);
} else {
++it2;
}
}
}
round_started_at_ = td::Timestamp::now();
round_debug_at_ = td::Timestamp::in(60.0);
check_all();
}
void ValidatorSessionImpl::on_catchain_started() {
catchain_started_ = true;
auto X = virtual_state_->get_blocks_approved_by(description(), local_idx());
for (auto &x : X) {
if (x) {
auto P = td::PromiseCreator::lambda([SelfId = actor_id(this), round = virtual_state_->cur_round_seqno(),
src = description().get_source_id(x->get_src_idx()),
root_hash = x->get_root_hash(),
compress = compress_block_candidates_](td::Result<BlockCandidate> R) {
if (R.is_error()) {
LOG(ERROR) << "failed to get candidate: " << R.move_as_error();
} else {
auto B = R.move_as_ok();
auto broadcast = create_tl_object<ton_api::validatorSession_candidate>(
src.tl(), round, root_hash, std::move(B.data), std::move(B.collated_data));
td::actor::send_closure(SelfId, &ValidatorSessionImpl::process_broadcast, src,
serialize_candidate(broadcast, compress).move_as_ok(), td::optional<ValidatorSessionCandidateId>(),
false);
}
});
callback_->get_approved_candidate(description().get_source_public_key(x->get_src_idx()), x->get_root_hash(),
x->get_file_hash(), x->get_collated_data_file_hash(), std::move(P));
}
}
check_all();
}
ValidatorSessionImpl::ValidatorSessionImpl(catchain::CatChainSessionId session_id, ValidatorSessionOptions opts,
PublicKeyHash local_id, std::vector<ValidatorSessionNode> nodes,
std::unique_ptr<Callback> callback,
td::actor::ActorId<keyring::Keyring> keyring,
td::actor::ActorId<adnl::Adnl> adnl, td::actor::ActorId<rldp::Rldp> rldp,
td::actor::ActorId<overlay::Overlays> overlays, std::string db_root,
std::string db_suffix, bool allow_unsafe_self_blocks_resync)
: unique_hash_(session_id)
, callback_(std::move(callback))
, db_root_(db_root)
, db_suffix_(db_suffix)
, keyring_(keyring)
, adnl_(adnl)
, rldp_(rldp)
, overlay_manager_(overlays)
, allow_unsafe_self_blocks_resync_(allow_unsafe_self_blocks_resync) {
compress_block_candidates_ = opts.proto_version >= 4;
description_ = ValidatorSessionDescription::create(std::move(opts), nodes, local_id);
src_round_candidate_.resize(description_->get_total_nodes());
}