diff options
Diffstat (limited to 'src/hotstuff.cpp')
| -rw-r--r-- | src/hotstuff.cpp | 647 |
1 files changed, 398 insertions, 249 deletions
diff --git a/src/hotstuff.cpp b/src/hotstuff.cpp index 74d2f04..9582531 100644 --- a/src/hotstuff.cpp +++ b/src/hotstuff.cpp @@ -1,288 +1,437 @@ -#include <iostream> -#include <cstring> -#include <cassert> -#include <algorithm> -#include <random> -#include <unistd.h> -#include <signal.h> -#include <event2/event.h> - -#include "salticidae/stream.h" -#include "salticidae/util.h" -#include "salticidae/network.h" -#include "salticidae/msg.h" - -#include "hotstuff/promise.hpp" -#include "hotstuff/type.h" -#include "hotstuff/core.h" -#include "hotstuff/entity.h" -#include "hotstuff/util.h" -#include "hotstuff/client.h" - -using promise::promise_t; -using salticidae::NetAddr; -using salticidae::MsgNetwork; -using salticidae::ClientNetwork; -using salticidae::Event; -using salticidae::ElapsedTime; -using salticidae::Config; -using salticidae::_1; -using salticidae::_2; +#include "hotstuff/hotstuff.h" + using salticidae::static_pointer_cast; -using salticidae::get_hash; -using salticidae::trim_all; -using salticidae::split; - -using hotstuff::HotStuffError; -using hotstuff::CommandDummy; -using hotstuff::Finality; -using hotstuff::command_t; -using hotstuff::uint256_t; -using hotstuff::bytearray_t; -using hotstuff::DataStream; -using hotstuff::ReplicaID; -using hotstuff::MsgClient; - -using HotStuff = hotstuff::HotStuffSecp256k1; #define LOG_INFO HOTSTUFF_LOG_INFO #define LOG_DEBUG HOTSTUFF_LOG_DEBUG #define LOG_WARN HOTSTUFF_LOG_WARN -#define LOG_ERROR HOTSTUFF_LOG_ERROR - -class HotStuffApp; - -class HotStuffApp: public HotStuff { - double stat_period; - /** libevent handle */ - EventContext eb; - /** network messaging between a replica and its client */ - ClientNetwork<MsgClient> cn; - /** timer object to schedule a periodic printing of system statistics */ - Event ev_stat_timer; - /** the binding address for client RPC */ - NetAddr clisten_addr; - - using conn_client_t = MsgNetwork<MsgClient>::conn_t; - - /** Client */ - /** submits a new command */ - inline void client_request_cmd_handler(const MsgClient &, conn_client_t); - /** checks if a cmd is decided */ - inline void client_check_cmd_handler(const MsgClient &, conn_client_t); - - /** The callback function to print stat */ - inline void print_stat_cb(evutil_socket_t, short); - - command_t parse_cmd(DataStream &s) override { - auto cmd = new CommandDummy(); - s >> *cmd; - return cmd; - } - public: - HotStuffApp(uint32_t blk_size, - int32_t parent_limit, - double stat_period, - ReplicaID idx, - const bytearray_t &raw_privkey, - NetAddr plisten_addr, - NetAddr clisten_addr, - const EventContext &eb); - - void start(); -}; - - -std::pair<std::string, std::string> split_ip_port_cport(const std::string &s) { - auto ret = trim_all(split(s, ";")); - if (ret.size() != 2) - throw std::invalid_argument("invalid cport format"); - return std::make_pair(ret[0], ret[1]); +namespace hotstuff { + +void MsgHotStuff::gen_propose(const Proposal &proposal) { + DataStream s; + set_opcode(PROPOSE); + s << proposal; + set_payload(std::move(s)); } -void signal_handler(int) { - throw HotStuffError("got terminal signal"); +void MsgHotStuff::parse_propose(Proposal &proposal) const { + DataStream(get_payload()) >> proposal; } -BoxObj<HotStuffApp> papp = nullptr; - -int main(int argc, char **argv) { - Config config("hotstuff.conf"); - - ElapsedTime elapsed; - elapsed.start(); - - signal(SIGTERM, signal_handler); - signal(SIGINT, signal_handler); - - auto opt_blk_size = Config::OptValInt::create(1); - auto opt_parent_limit = Config::OptValInt::create(-1); - auto opt_stat_period = Config::OptValDouble::create(10); - auto opt_replicas = Config::OptValStrVec::create(); - auto opt_idx = Config::OptValInt::create(0); - auto opt_client_port = Config::OptValInt::create(-1); - auto opt_privkey = Config::OptValStr::create(); - auto opt_help = Config::OptValFlag::create(false); - - config.add_opt("block-size", opt_blk_size, Config::SET_VAL); - config.add_opt("parent-limit", opt_parent_limit, Config::SET_VAL); - config.add_opt("stat-period", opt_stat_period, Config::SET_VAL); - config.add_opt("replica", opt_replicas, Config::APPEND); - config.add_opt("idx", opt_idx, Config::SET_VAL); - config.add_opt("cport", opt_client_port, Config::SET_VAL); - config.add_opt("privkey", opt_privkey, Config::SET_VAL); - config.add_opt("help", opt_help, Config::SWITCH_ON, 'h', "show this help info"); - - EventContext eb; -#ifndef HOTSTUFF_ENABLE_LOG_DEBUG - try { -#endif - config.parse(argc, argv); - if (opt_help->get()) - { - config.print_help(); - exit(0); - } - auto idx = opt_idx->get(); - auto client_port = opt_client_port->get(); - std::vector<std::pair<std::string, std::string>> replicas; - for (const auto &s: opt_replicas->get()) +void MsgHotStuff::gen_vote(const Vote &vote) { + DataStream s; + set_opcode(VOTE); + s << vote; + set_payload(std::move(s)); +} + +void MsgHotStuff::parse_vote(Vote &vote) const { + DataStream(get_payload()) >> vote; +} + +void MsgHotStuff::gen_qfetchblk(const std::vector<uint256_t> &blk_hashes) { + DataStream s; + set_opcode(QUERY_FETCH_BLK); + gen_hash_list(s, blk_hashes); + set_payload(std::move(s)); +} + +void MsgHotStuff::parse_qfetchblk(std::vector<uint256_t> &blk_hashes) const { + DataStream s(get_payload()); + parse_hash_list(s, blk_hashes); +} + +void MsgHotStuff::gen_rfetchblk(const std::vector<block_t> &blks) { + DataStream s; + set_opcode(RESP_FETCH_BLK); + s << htole((uint32_t)blks.size()); + for (auto blk: blks) s << *blk; + set_payload(std::move(s)); +} + +void MsgHotStuff::parse_rfetchblk(std::vector<block_t> &blks, HotStuffCore *hsc) const { + DataStream s; + uint32_t size; + s >> size; + size = letoh(size); + blks.resize(size); + for (auto &blk: blks) + { + Block _blk; + _blk.unserialize(s, hsc); + if (!_blk.verify(hsc->get_config())) + blk = hsc->storage->add_blk(std::move(_blk)); + else { - auto res = trim_all(split(s, ",")); - if (res.size() != 2) - throw HotStuffError("invalid replica info"); - replicas.push_back(std::make_pair(res[0], res[1])); + blk = nullptr; + LOG_WARN("block is invalid"); } + } +} - if (!(0 <= idx && (size_t)idx < replicas.size())) - throw HotStuffError("replica idx out of range"); - std::string binding_addr = replicas[idx].first; - if (client_port == -1) +void HotStuffBase::add_replica(ReplicaID idx, const NetAddr &addr, + pubkey_bt &&pub_key) { + HotStuffCore::add_replica(idx, addr, std::move(pub_key)); + if (addr != listen_addr) + pn.add_peer(addr); +} + +void HotStuffBase::on_fetch_blk(const block_t &blk) { +#ifdef HOTSTUFF_ENABLE_TX_PROFILE + blk_profiler.get_tx(blk->get_hash()); +#endif + LOG_DEBUG("fetched %.10s", get_hex(blk->get_hash()).c_str()); + part_fetched++; + fetched++; + for (auto cmd: blk->get_cmds()) on_fetch_cmd(cmd); + const uint256_t &blk_hash = blk->get_hash(); + auto it = blk_fetch_waiting.find(blk_hash); + if (it != blk_fetch_waiting.end()) + { + it->second.resolve(blk); + blk_fetch_waiting.erase(it); + } +} + +void HotStuffBase::on_fetch_cmd(const command_t &cmd) { + const uint256_t &cmd_hash = cmd->get_hash(); + auto it = cmd_fetch_waiting.find(cmd_hash); + if (it != cmd_fetch_waiting.end()) + { + it->second.resolve(cmd); + cmd_fetch_waiting.erase(it); + } +} + +void HotStuffBase::on_deliver_blk(const block_t &blk) { + const uint256_t &blk_hash = blk->get_hash(); + bool valid; + /* sanity check: all parents must be delivered */ + for (const auto &p: blk->get_parent_hashes()) + assert(storage->is_blk_delivered(p)); + if ((valid = HotStuffCore::on_deliver_blk(blk))) + { + LOG_DEBUG("block %.10s delivered", + get_hex(blk_hash).c_str()); + part_parent_size += blk->get_parent_hashes().size(); + part_delivered++; + delivered++; + } + else + { + LOG_WARN("dropping invalid block"); + } + + auto it = blk_delivery_waiting.find(blk_hash); + if (it != blk_delivery_waiting.end()) + { + auto &pm = it->second; + if (valid) { - auto p = split_ip_port_cport(binding_addr); - size_t idx; - try { - client_port = stoi(p.second, &idx); - } catch (std::invalid_argument &) { - throw HotStuffError("client port not specified"); - } - } + pm.elapsed.stop(false); + auto sec = pm.elapsed.elapsed_sec; + part_delivery_time += sec; + part_delivery_time_min = std::min(part_delivery_time_min, sec); + part_delivery_time_max = std::max(part_delivery_time_max, sec); - NetAddr plisten_addr{split_ip_port_cport(binding_addr).first}; - - papp = new HotStuffApp(opt_blk_size->get(), - opt_parent_limit->get(), - opt_stat_period->get(), - idx, - hotstuff::from_hex(opt_privkey->get()), - plisten_addr, - NetAddr("0.0.0.0", client_port), - eb); - for (size_t i = 0; i < replicas.size(); i++) + pm.resolve(blk); + } + else { - auto p = split_ip_port_cport(replicas[i].first); - papp->add_replica(i, NetAddr(p.first), - hotstuff::from_hex(replicas[i].second)); + pm.reject(blk); + // TODO: do we need to also free it from storage? } - papp->start(); -#ifndef HOTSTUFF_ENABLE_LOG_DEBUG - } catch (std::exception &e) { - HOTSTUFF_LOG_INFO("exception: %s", e.what()); - elapsed.stop(true); + blk_delivery_waiting.erase(it); } +} + +promise_t HotStuffBase::async_fetch_blk(const uint256_t &blk_hash, + const NetAddr *replica_id, + bool fetch_now) { + if (storage->is_blk_fetched(blk_hash)) + return promise_t([this, &blk_hash](promise_t pm){ + pm.resolve(storage->find_blk(blk_hash)); + }); + auto it = blk_fetch_waiting.find(blk_hash); + if (it == blk_fetch_waiting.end()) + { +#ifdef HOTSTUFF_ENABLE_TX_PROFILE + blk_profiler.rec_tx(blk_hash, false); #endif - return 0; + it = blk_fetch_waiting.insert( + std::make_pair( + blk_hash, + BlockFetchContext(blk_hash, this))).first; + } + if (replica_id != nullptr) + it->second.add_replica(*replica_id, fetch_now); + return static_cast<promise_t &>(it->second); } -HotStuffApp::HotStuffApp(uint32_t blk_size, - int32_t parent_limit, - double stat_period, - ReplicaID idx, - const bytearray_t &raw_privkey, - NetAddr plisten_addr, - NetAddr clisten_addr, - const EventContext &eb): - HotStuff(blk_size, parent_limit, idx, raw_privkey, - plisten_addr, eb), - stat_period(stat_period), - eb(eb), - cn(eb), - clisten_addr(clisten_addr) { - /* register the handlers for msg from clients */ - cn.reg_handler(hotstuff::REQ_CMD, std::bind(&HotStuffApp::client_request_cmd_handler, this, _1, _2)); - cn.reg_handler(hotstuff::CHK_CMD, std::bind(&HotStuffApp::client_check_cmd_handler, this, _1, _2)); - cn.init(clisten_addr); +promise_t HotStuffBase::async_fetch_cmd(const uint256_t &cmd_hash, + const NetAddr *replica_id, + bool fetch_now) { + if (storage->is_cmd_fetched(cmd_hash)) + return promise_t([this, &cmd_hash](promise_t pm){ + pm.resolve(storage->find_cmd(cmd_hash)); + }); + auto it = cmd_fetch_waiting.find(cmd_hash); + if (it == cmd_fetch_waiting.end()) + { + it = cmd_fetch_waiting.insert( + std::make_pair(cmd_hash, CmdFetchContext(cmd_hash, this))).first; + } + if (replica_id != nullptr) + it->second.add_replica(*replica_id, fetch_now); + return static_cast<promise_t &>(it->second); } -void HotStuffApp::client_request_cmd_handler(const MsgClient &msg, conn_client_t conn_) { - auto conn = static_pointer_cast<ClientNetwork<MsgClient>::Conn>(conn_); - const NetAddr addr = conn->get_addr(); - command_t cmd = new CommandDummy(); +promise_t HotStuffBase::async_deliver_blk(const uint256_t &blk_hash, + const NetAddr &replica_id) { + if (storage->is_blk_delivered(blk_hash)) + return promise_t([this, &blk_hash](promise_t pm) { + pm.resolve(storage->find_blk(blk_hash)); + }); + auto it = blk_delivery_waiting.find(blk_hash); + if (it != blk_delivery_waiting.end()) + return static_cast<promise_t &>(it->second); + BlockDeliveryContext pm{[](promise_t){}}; + it = blk_delivery_waiting.insert(std::make_pair(blk_hash, pm)).first; + /* otherwise the on_deliver_batch will resolve */ + async_fetch_blk(blk_hash, &replica_id).then([this, replica_id](block_t blk) { + /* qc_ref should be fetched */ + std::vector<promise_t> pms; + const auto &qc = blk->get_qc(); + if (qc) + pms.push_back(async_fetch_blk(qc->get_blk_hash(), &replica_id)); + /* the parents should be delivered */ + for (const auto &phash: blk->get_parent_hashes()) + pms.push_back(async_deliver_blk(phash, replica_id)); + promise::all(pms).then([this, blk]() { + on_deliver_blk(blk); + }); + }); + return static_cast<promise_t &>(pm); +} + +void HotStuffBase::propose_handler(const MsgHotStuff &msg, conn_t conn_) { + auto conn = static_pointer_cast<PeerNetwork<MsgHotStuff>::Conn>(conn_); + const NetAddr &peer = conn->get_peer(); + Proposal prop(this); + msg.parse_propose(prop); + block_t blk = prop.blk; + promise::all(std::vector<promise_t>{ + async_deliver_blk(prop.bqc_hash, peer), + async_deliver_blk(blk->get_hash(), peer), + }).then([this, prop = std::move(prop)]() { + on_receive_proposal(prop); + }); +} + +void HotStuffBase::vote_handler(const MsgHotStuff &msg, conn_t conn_) { + auto conn = static_pointer_cast<PeerNetwork<MsgHotStuff>::Conn>(conn_); + const NetAddr &peer = conn->get_peer(); + Vote vote(this); + msg.parse_vote(vote); + promise::all(std::vector<promise_t>{ + async_deliver_blk(vote.bqc_hash, peer), + async_deliver_blk(vote.blk_hash, peer) + }).then([this, vote = std::move(vote)]() { + on_receive_vote(vote); + }); +} + +void HotStuffBase::query_fetch_blk_handler(const MsgHotStuff &msg, conn_t conn_) { + auto conn = static_pointer_cast<PeerNetwork<MsgHotStuff>::Conn>(conn_); + const NetAddr replica = conn->get_peer(); + std::vector<uint256_t> blk_hashes; + msg.parse_qfetchblk(blk_hashes); + std::vector<promise_t> pms; - msg.parse_reqcmd(static_cast<CommandDummy &>(*cmd)); + for (const auto &h: blk_hashes) + pms.push_back(async_fetch_blk(h, nullptr)); + promise::all(pms).then([replica, this](const promise::values_t values) { + MsgHotStuff resp; + std::vector<block_t> blks; + for (auto &v: values) + { + auto blk = promise::any_cast<block_t>(v); + blks.push_back(blk); + } + resp.gen_rfetchblk(blks); + pn.send_msg(resp, replica); + }); +} - bool flag = true; -#ifndef HOTSTUFF_DISABLE_TX_VERIFY - flag &= cmd->verify(); -#endif - if (!flag) +void HotStuffBase::resp_fetch_blk_handler(const MsgHotStuff &msg, conn_t) { + std::vector<block_t> blks; + msg.parse_rfetchblk(blks, this); + for (const auto &blk: blks) + if (blk) on_fetch_blk(blk); +} + +void HotStuffBase::print_stat() const { + LOG_INFO("===== begin stats ====="); + LOG_INFO("-------- queues -------"); + LOG_INFO("blk_fetch_waiting: %lu", blk_fetch_waiting.size()); + LOG_INFO("blk_delivery_waiting: %lu", blk_delivery_waiting.size()); + LOG_INFO("cmd_fetch_waiting: %lu", cmd_fetch_waiting.size()); + LOG_INFO("decision_waiting: %lu", decision_waiting.size()); + LOG_INFO("-------- misc ---------"); + LOG_INFO("fetched: %lu", fetched); + LOG_INFO("delivered: %lu", delivered); + LOG_INFO("cmd_cache: %lu", storage->get_cmd_cache_size()); + LOG_INFO("blk_cache: %lu", storage->get_blk_cache_size()); + LOG_INFO("------ misc (10s) -----"); + LOG_INFO("fetched: %lu", part_fetched); + LOG_INFO("delivered: %lu", part_delivered); + LOG_INFO("decided: %lu", part_decided); + LOG_INFO("gened: %lu", part_gened); + LOG_INFO("avg. parent_size: %.3f", + part_delivered ? part_parent_size / double(part_delivered) : 0); + LOG_INFO("delivery time: %.3f avg, %.3f min, %.3f max", + part_delivered ? part_delivery_time / double(part_delivered) : 0, + part_delivery_time_min == double_inf ? 0 : part_delivery_time_min, + part_delivery_time_max); + + part_parent_size = 0; + part_fetched = 0; + part_delivered = 0; + part_decided = 0; + part_gened = 0; + part_delivery_time = 0; + part_delivery_time_min = double_inf; + part_delivery_time_max = 0; + LOG_INFO("-- sent opcode (10s) --"); + auto &sent_op = pn.get_sent_by_opcode(); + for (auto &op: sent_op) { - LOG_WARN("invalid client cmd"); - MsgClient resp; - resp.gen_respcmd(cmd->get_hash(), Finality(-1, uint256_t())); - cn.send_msg(resp, addr); + auto &val = op.second; + LOG_INFO("%02x: %lu, %.2fBpm", op.first, + val.first, val.first ? val.second / double(val.first) : 0); + val.first = val.second = 0; } - else + LOG_INFO("-- recv opcode (10s) --"); + auto &recv_op = pn.get_recv_by_opcode(); + for (auto &op: recv_op) { - const uint256_t cmd_hash = cmd->get_hash(); - add_command(cmd); - /** wait for the decision of tx */ - LOG_DEBUG("processing client cmd %.10s", get_hex(cmd_hash).c_str()); - async_decide(cmd_hash).then([this, addr](command_t cmd) { - MsgClient resp; - resp.gen_respcmd(cmd->get_hash(), cmd->get_finality()); - cn.send_msg(resp, addr); + auto &val = op.second; + LOG_INFO("%02x: %lu, %.2fBpm", op.first, + val.first, val.first ? val.second / double(val.first) : 0); + val.first = val.second = 0; + } + LOG_INFO("--- replica msg. (10s) ---"); + size_t _nsent = 0; + size_t _nrecv = 0; + for (const auto &replica: pn.all_peers()) + { + auto conn = pn.get_peer_conn(replica); + size_t ns = conn->get_nsent(); + size_t nr = conn->get_nrecv(); + conn->clear_nsent(); + conn->clear_nrecv(); + LOG_INFO("%s: %u, %u, %u", + std::string(replica).c_str(), ns, nr, part_fetched_replica[replica]); + _nsent += ns; + _nrecv += nr; + part_fetched_replica[replica] = 0; + } + nsent += _nsent; + nrecv += _nrecv; + LOG_INFO("sent: %lu", _nsent); + LOG_INFO("recv: %lu", _nrecv); + LOG_INFO("--- replica msg. total ---"); + LOG_INFO("sent: %lu", nsent); + LOG_INFO("recv: %lu", nrecv); + LOG_INFO("====== end stats ======"); +} + +promise_t HotStuffBase::async_decide(const uint256_t &cmd_hash) { + if (get_cmd_decision(cmd_hash)) + return promise_t([this, cmd_hash](promise_t pm){ + pm.resolve(storage->find_cmd(cmd_hash)); }); + /* otherwise the do_decide will resolve the promise */ + auto it = decision_waiting.find(cmd_hash); + if (it == decision_waiting.end()) + { + promise_t pm{[](promise_t){}}; + it = decision_waiting.insert(std::make_pair(cmd_hash, pm)).first; } + return it->second; } -void HotStuffApp::client_check_cmd_handler(const MsgClient &msg, conn_client_t conn_) { - auto conn = static_pointer_cast<ClientNetwork<MsgClient>::Conn>(conn_); - const NetAddr addr = conn->get_addr(); - uint256_t cmd_hash; - msg.parse_chkcmd(cmd_hash); - MsgClient resp; - command_t cmd = storage->find_cmd(cmd_hash); - Finality fin; - if (cmd) fin = cmd->get_finality(); - resp.gen_respcmd(cmd_hash, fin); - cn.send_msg(resp, addr); +HotStuffBase::HotStuffBase(uint32_t blk_size, + int32_t parent_limit, + ReplicaID rid, + privkey_bt &&priv_key, + NetAddr listen_addr, + EventContext eb, + pacemaker_bt pmaker): + HotStuffCore(rid, std::move(priv_key), parent_limit), + listen_addr(listen_addr), + blk_size(blk_size), + eb(eb), + pmaker(std::move(pmaker)), + pn(eb), + + fetched(0), delivered(0), + nsent(0), nrecv(0), + part_parent_size(0), + part_fetched(0), + part_delivered(0), + part_decided(0), + part_gened(0), + part_delivery_time(0), + part_delivery_time_min(double_inf), + part_delivery_time_max(0) +{ + if (pmaker == nullptr) + this->pmaker = new PaceMakerDummy(this); + /* register the handlers for msg from replicas */ + pn.reg_handler(PROPOSE, std::bind(&HotStuffBase::propose_handler, this, _1, _2)); + pn.reg_handler(VOTE, std::bind(&HotStuffBase::vote_handler, this, _1, _2)); + pn.reg_handler(QUERY_FETCH_BLK, std::bind(&HotStuffBase::query_fetch_blk_handler, this, _1, _2)); + pn.reg_handler(RESP_FETCH_BLK, std::bind(&HotStuffBase::resp_fetch_blk_handler, this, _1, _2)); + pn.init(listen_addr); } +void HotStuffBase::do_broadcast_proposal(const Proposal &prop) { + MsgHotStuff prop_msg; + prop_msg.gen_propose(prop); + for (const auto &replica: pn.all_peers()) + pn.send_msg(prop_msg, replica); +} -void HotStuffApp::start() { - ev_stat_timer = Event(eb, -1, 0, - std::bind(&HotStuffApp::print_stat_cb, this, _1, _2)); - ev_stat_timer.add_with_timeout(stat_period); - LOG_INFO("** starting the system with parameters **"); - LOG_INFO("blk_size = %lu", blk_size); - LOG_INFO("parent_limit = %d", parent_limit); - LOG_INFO("conns = %lu", HotStuff::size()); - LOG_INFO("** starting the event loop..."); -#ifdef HOTSTUFF_DISABLE_TX_VERIFY - LOG_INFO("!! verification disabled !!"); -#else - LOG_INFO("** verification enabled **"); -#endif - HotStuff::start(); - /* enter the event main loop */ - eb.dispatch(); +void HotStuffBase::do_vote(ReplicaID last_proposer, const Vote &vote) { + MsgHotStuff vote_msg; + vote_msg.gen_vote(vote); + pmaker->next_proposer(last_proposer) + .then([this, vote_msg](ReplicaID proposer) { + pn.send_msg(vote_msg, get_config().get_addr(proposer)); + }); } +void HotStuffBase::do_decide(const command_t &cmd) { + auto it = decision_waiting.find(cmd->get_hash()); + if (it != decision_waiting.end()) + { + it->second.resolve(cmd); + decision_waiting.erase(it); + } +} + +HotStuffBase::~HotStuffBase() {} + +void HotStuffBase::start(bool eb_loop) { + /* ((n - 1) + 1 - 1) / 3 */ + uint32_t nfaulty = pn.all_peers().size() / 3; + if (nfaulty == 0) + LOG_WARN("too few replicas in the system to tolerate any failure"); + on_init(nfaulty); + if (eb_loop) + eb.dispatch(); +} -void HotStuffApp::print_stat_cb(evutil_socket_t, short) { - HotStuff::print_stat(); - HotStuffCore::prune(100); - ev_stat_timer.add_with_timeout(stat_period); } |