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application.cpp
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application.cpp
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/*
* Copyright (c) 2015 Cryptonomex, Inc., and contributors.
*
* The MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <graphene/app/api.hpp>
#include <graphene/app/api_access.hpp>
#include <graphene/app/application.hpp>
#include <graphene/app/plugin.hpp>
#include <graphene/chain/db_with.hpp>
#include <graphene/chain/genesis_state.hpp>
#include <graphene/protocol/fee_schedule.hpp>
#include <graphene/protocol/types.hpp>
#include <graphene/egenesis/egenesis.hpp>
#include <graphene/net/core_messages.hpp>
#include <graphene/net/exceptions.hpp>
#include <graphene/utilities/key_conversion.hpp>
#include <graphene/chain/worker_evaluator.hpp>
#include <fc/asio.hpp>
#include <fc/io/fstream.hpp>
#include <fc/rpc/api_connection.hpp>
#include <fc/rpc/websocket_api.hpp>
#include <fc/network/resolve.hpp>
#include <fc/crypto/base64.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/signals2.hpp>
#include <boost/range/algorithm/reverse.hpp>
#include <boost/algorithm/string.hpp>
#include <iostream>
#include <fc/log/file_appender.hpp>
#include <fc/log/logger.hpp>
#include <fc/log/logger_config.hpp>
#include <boost/range/adaptor/reversed.hpp>
namespace graphene { namespace app {
using net::item_hash_t;
using net::item_id;
using net::message;
using net::block_message;
using net::trx_message;
using chain::block_header;
using chain::signed_block_header;
using chain::signed_block;
using chain::block_id_type;
using std::vector;
namespace bpo = boost::program_options;
namespace detail {
graphene::chain::genesis_state_type create_example_genesis() {
auto nathan_key = fc::ecc::private_key::regenerate(fc::sha256::hash(string("nathan")));
dlog("Allocating all stake to ${key}", ("key", utilities::key_to_wif(nathan_key)));
graphene::chain::genesis_state_type initial_state;
initial_state.initial_parameters.get_mutable_fees() = fee_schedule::get_default();
initial_state.initial_active_witnesses = GRAPHENE_DEFAULT_MIN_WITNESS_COUNT;
initial_state.initial_timestamp = time_point_sec(time_point::now().sec_since_epoch() /
initial_state.initial_parameters.block_interval *
initial_state.initial_parameters.block_interval);
for( uint64_t i = 0; i < initial_state.initial_active_witnesses; ++i )
{
auto name = "init"+fc::to_string(i);
initial_state.initial_accounts.emplace_back(name,
nathan_key.get_public_key(),
nathan_key.get_public_key(),
true);
initial_state.initial_committee_candidates.push_back({name});
initial_state.initial_witness_candidates.push_back({name, nathan_key.get_public_key()});
}
initial_state.initial_accounts.emplace_back("nathan", nathan_key.get_public_key());
initial_state.initial_balances.push_back({nathan_key.get_public_key(),
GRAPHENE_SYMBOL,
GRAPHENE_MAX_SHARE_SUPPLY});
initial_state.initial_chain_id = fc::sha256::hash( "BOGUS" );
return initial_state;
}
}
}}
#include "application_impl.hxx"
namespace graphene { namespace app { namespace detail {
void application_impl::reset_p2p_node(const fc::path& data_dir)
{ try {
_p2p_network = std::make_shared<net::node>("BitShares Reference Implementation");
_p2p_network->load_configuration(data_dir / "p2p");
_p2p_network->set_node_delegate(this);
if( _options->count("seed-node") )
{
auto seeds = _options->at("seed-node").as<vector<string>>();
for( const string& endpoint_string : seeds )
{
try {
std::vector<fc::ip::endpoint> endpoints = resolve_string_to_ip_endpoints(endpoint_string);
for (const fc::ip::endpoint& endpoint : endpoints)
{
ilog("Adding seed node ${endpoint}", ("endpoint", endpoint));
_p2p_network->add_node(endpoint);
_p2p_network->connect_to_endpoint(endpoint);
}
} catch( const fc::exception& e ) {
wlog( "caught exception ${e} while adding seed node ${endpoint}",
("e", e.to_detail_string())("endpoint", endpoint_string) );
}
}
}
if( _options->count("seed-nodes") )
{
auto seeds_str = _options->at("seed-nodes").as<string>();
auto seeds = fc::json::from_string(seeds_str).as<vector<string>>(2);
for( const string& endpoint_string : seeds )
{
try {
std::vector<fc::ip::endpoint> endpoints = resolve_string_to_ip_endpoints(endpoint_string);
for (const fc::ip::endpoint& endpoint : endpoints)
{
ilog("Adding seed node ${endpoint}", ("endpoint", endpoint));
_p2p_network->add_node(endpoint);
}
} catch( const fc::exception& e ) {
wlog( "caught exception ${e} while adding seed node ${endpoint}",
("e", e.to_detail_string())("endpoint", endpoint_string) );
}
}
}
else
{
// https://bitsharestalk.org/index.php/topic,23715.0.html
vector<string> seeds = {
"seed01.liondani.com:1776", // liondani (GERMANY)
"104.236.144.84:1777", // puppies (USA)
"128.199.143.47:2015", // Harvey (Singapore)
"209.105.239.13:1776", // sahkan (USA)
"45.35.12.22:1776", // sahkan (USA)
"51.15.61.160:1776", // lafona (France)
"bts-seed1.abit-more.com:62015", // abit (China)
"node.blckchnd.com:4243", // blckchnd (Germany)
"seed.bitsharesdex.com:50696", // iHashFury (Europe)
"seed.bitsharesnodes.com:1776", // wackou (Netherlands)
"seed.blocktrades.us:1776", // BlockTrades (USA)
"seed.cubeconnex.com:1777", // cube (USA)
"seed.roelandp.nl:1776", // roelandp (Canada)
"seed04.bts-nodes.net:1776", // Thom (Australia)
"seed05.bts-nodes.net:1776", // Thom (USA)
"seed06.bts-nodes.net:1776", // Thom (USA)
"seed07.bts-nodes.net:1776", // Thom (Singapore)
"seed.bts.bangzi.info:55501", // Bangzi (Germany)
"seeds.bitshares.eu:1776" // pc (http://seeds.quisquis.de/bitshares.html)
};
for( const string& endpoint_string : seeds )
{
try {
std::vector<fc::ip::endpoint> endpoints = resolve_string_to_ip_endpoints(endpoint_string);
for (const fc::ip::endpoint& endpoint : endpoints)
{
ilog("Adding seed node ${endpoint}", ("endpoint", endpoint));
_p2p_network->add_node(endpoint);
}
} catch( const fc::exception& e ) {
wlog( "caught exception ${e} while adding seed node ${endpoint}",
("e", e.to_detail_string())("endpoint", endpoint_string) );
}
}
}
if( _options->count("p2p-endpoint") )
_p2p_network->listen_on_endpoint(fc::ip::endpoint::from_string(_options->at("p2p-endpoint").as<string>()), true);
else
_p2p_network->listen_on_port(0, false);
_p2p_network->listen_to_p2p_network();
ilog("Configured p2p node to listen on ${ip}", ("ip", _p2p_network->get_actual_listening_endpoint()));
_p2p_network->connect_to_p2p_network();
_p2p_network->sync_from(net::item_id(net::core_message_type_enum::block_message_type,
_chain_db->head_block_id()),
std::vector<uint32_t>());
} FC_CAPTURE_AND_RETHROW() }
std::vector<fc::ip::endpoint> application_impl::resolve_string_to_ip_endpoints(const std::string& endpoint_string)
{
try
{
string::size_type colon_pos = endpoint_string.find(':');
if (colon_pos == std::string::npos)
FC_THROW("Missing required port number in endpoint string \"${endpoint_string}\"",
("endpoint_string", endpoint_string));
std::string port_string = endpoint_string.substr(colon_pos + 1);
try
{
uint16_t port = boost::lexical_cast<uint16_t>(port_string);
std::string hostname = endpoint_string.substr(0, colon_pos);
std::vector<fc::ip::endpoint> endpoints = fc::resolve(hostname, port);
if (endpoints.empty())
FC_THROW_EXCEPTION( fc::unknown_host_exception,
"The host name can not be resolved: ${hostname}",
("hostname", hostname) );
return endpoints;
}
catch (const boost::bad_lexical_cast&)
{
FC_THROW("Bad port: ${port}", ("port", port_string));
}
}
FC_CAPTURE_AND_RETHROW((endpoint_string))
}
void application_impl::new_connection( const fc::http::websocket_connection_ptr& c )
{
auto wsc = std::make_shared<fc::rpc::websocket_api_connection>(c, GRAPHENE_NET_MAX_NESTED_OBJECTS);
auto login = std::make_shared<graphene::app::login_api>( std::ref(*_self) );
login->enable_api("database_api");
wsc->register_api(login->database());
wsc->register_api(fc::api<graphene::app::login_api>(login));
c->set_session_data( wsc );
std::string username = "*";
std::string password = "*";
// Try to extract login information from "Authorization" header if present
std::string auth = c->get_request_header("Authorization");
if( boost::starts_with(auth, "Basic ") ) {
FC_ASSERT( auth.size() > 6 );
auto user_pass = fc::base64_decode(auth.substr(6));
std::vector<std::string> parts;
boost::split( parts, user_pass, boost::is_any_of(":") );
FC_ASSERT(parts.size() == 2);
username = parts[0];
password = parts[1];
}
login->login(username, password);
}
void application_impl::reset_websocket_server()
{ try {
if( !_options->count("rpc-endpoint") )
return;
_websocket_server = std::make_shared<fc::http::websocket_server>();
_websocket_server->on_connection( std::bind(&application_impl::new_connection, this, std::placeholders::_1) );
ilog("Configured websocket rpc to listen on ${ip}", ("ip",_options->at("rpc-endpoint").as<string>()));
_websocket_server->listen( fc::ip::endpoint::from_string(_options->at("rpc-endpoint").as<string>()) );
_websocket_server->start_accept();
} FC_CAPTURE_AND_RETHROW() }
void application_impl::reset_websocket_tls_server()
{ try {
if( !_options->count("rpc-tls-endpoint") )
return;
if( !_options->count("server-pem") )
{
wlog( "Please specify a server-pem to use rpc-tls-endpoint" );
return;
}
string password = _options->count("server-pem-password") ? _options->at("server-pem-password").as<string>() : "";
_websocket_tls_server = std::make_shared<fc::http::websocket_tls_server>( _options->at("server-pem").as<string>(), password );
_websocket_tls_server->on_connection( std::bind(&application_impl::new_connection, this, std::placeholders::_1) );
ilog("Configured websocket TLS rpc to listen on ${ip}", ("ip",_options->at("rpc-tls-endpoint").as<string>()));
_websocket_tls_server->listen( fc::ip::endpoint::from_string(_options->at("rpc-tls-endpoint").as<string>()) );
_websocket_tls_server->start_accept();
} FC_CAPTURE_AND_RETHROW() }
void application_impl::set_dbg_init_key( graphene::chain::genesis_state_type& genesis, const std::string& init_key )
{
flat_set< std::string > initial_witness_names;
public_key_type init_pubkey( init_key );
for( uint64_t i=0; i<genesis.initial_active_witnesses; i++ )
genesis.initial_witness_candidates[i].block_signing_key = init_pubkey;
}
void application_impl::set_api_limit() {
if (_options->count("api-limit-get-account-history-operations")) {
_app_options.api_limit_get_account_history_operations = _options->at("api-limit-get-account-history-operations").as<uint64_t>();
}
if(_options->count("api-limit-get-account-history")){
_app_options.api_limit_get_account_history = _options->at("api-limit-get-account-history").as<uint64_t>();
}
if(_options->count("api-limit-get-grouped-limit-orders")){
_app_options.api_limit_get_grouped_limit_orders = _options->at("api-limit-get-grouped-limit-orders").as<uint64_t>();
}
if(_options->count("api-limit-get-relative-account-history")){
_app_options.api_limit_get_relative_account_history = _options->at("api-limit-get-relative-account-history").as<uint64_t>();
}
if(_options->count("api-limit-get-account-history-by-operations")){
_app_options.api_limit_get_account_history_by_operations = _options->at("api-limit-get-account-history-by-operations").as<uint64_t>();
}
if(_options->count("api-limit-get-asset-holders")){
_app_options.api_limit_get_asset_holders = _options->at("api-limit-get-asset-holders").as<uint64_t>();
}
if(_options->count("api-limit-get-key-references")){
_app_options.api_limit_get_key_references = _options->at("api-limit-get-key-references").as<uint64_t>();
}
if(_options->count("api-limit-get-htlc-by")) {
_app_options.api_limit_get_htlc_by = _options->at("api-limit-get-htlc-by").as<uint64_t>();
}
if(_options->count("api-limit-get-full-accounts")) {
_app_options.api_limit_get_full_accounts = _options->at("api-limit-get-full-accounts").as<uint64_t>();
}
if(_options->count("api-limit-get-full-accounts-lists")) {
_app_options.api_limit_get_full_accounts_lists = _options->at("api-limit-get-full-accounts-lists").as<uint64_t>();
}
if(_options->count("api-limit-get-call-orders")) {
_app_options.api_limit_get_call_orders = _options->at("api-limit-get-call-orders").as<uint64_t>();
}
if(_options->count("api-limit-get-settle-orders")) {
_app_options.api_limit_get_settle_orders = _options->at("api-limit-get-settle-orders").as<uint64_t>();
}
if(_options->count("api-limit-get-assets")) {
_app_options.api_limit_get_assets = _options->at("api-limit-get-assets").as<uint64_t>();
}
if(_options->count("api-limit-get-limit-orders")){
_app_options.api_limit_get_limit_orders = _options->at("api-limit-get-limit-orders").as<uint64_t>();
}
if(_options->count("api-limit-get-order-book")){
_app_options.api_limit_get_order_book = _options->at("api-limit-get-order-book").as<uint64_t>();
}
}
void application_impl::startup()
{ try {
fc::create_directories(_data_dir / "blockchain");
auto initial_state = [this] {
ilog("Initializing database...");
if( _options->count("genesis-json") )
{
std::string genesis_str;
fc::read_file_contents( _options->at("genesis-json").as<boost::filesystem::path>(), genesis_str );
graphene::chain::genesis_state_type genesis = fc::json::from_string( genesis_str ).as<graphene::chain::genesis_state_type>( 20 );
bool modified_genesis = false;
if( _options->count("genesis-timestamp") )
{
genesis.initial_timestamp = fc::time_point_sec( fc::time_point::now() )
+ genesis.initial_parameters.block_interval
+ _options->at("genesis-timestamp").as<uint32_t>();
genesis.initial_timestamp -= ( genesis.initial_timestamp.sec_since_epoch()
% genesis.initial_parameters.block_interval );
modified_genesis = true;
ilog(
"Used genesis timestamp: ${timestamp} (PLEASE RECORD THIS)",
("timestamp", genesis.initial_timestamp.to_iso_string())
);
}
if( _options->count("dbg-init-key") )
{
std::string init_key = _options->at( "dbg-init-key" ).as<string>();
FC_ASSERT( genesis.initial_witness_candidates.size() >= genesis.initial_active_witnesses );
set_dbg_init_key( genesis, init_key );
modified_genesis = true;
ilog("Set init witness key to ${init_key}", ("init_key", init_key));
}
if( modified_genesis )
{
wlog("WARNING: GENESIS WAS MODIFIED, YOUR CHAIN ID MAY BE DIFFERENT");
genesis_str += "BOGUS";
genesis.initial_chain_id = fc::sha256::hash( genesis_str );
}
else
genesis.initial_chain_id = fc::sha256::hash( genesis_str );
return genesis;
}
else
{
std::string egenesis_json;
graphene::egenesis::compute_egenesis_json( egenesis_json );
FC_ASSERT( egenesis_json != "" );
FC_ASSERT( graphene::egenesis::get_egenesis_json_hash() == fc::sha256::hash( egenesis_json ) );
auto genesis = fc::json::from_string( egenesis_json ).as<graphene::chain::genesis_state_type>( 20 );
genesis.initial_chain_id = fc::sha256::hash( egenesis_json );
return genesis;
}
};
if( _options->count("resync-blockchain") )
_chain_db->wipe(_data_dir / "blockchain", true);
flat_map<uint32_t,block_id_type> loaded_checkpoints;
if( _options->count("checkpoint") )
{
auto cps = _options->at("checkpoint").as<vector<string>>();
loaded_checkpoints.reserve( cps.size() );
for( auto cp : cps )
{
auto item = fc::json::from_string(cp).as<std::pair<uint32_t,block_id_type> >( 2 );
loaded_checkpoints[item.first] = item.second;
}
}
_chain_db->add_checkpoints( loaded_checkpoints );
if( _options->count("enable-standby-votes-tracking") )
{
_chain_db->enable_standby_votes_tracking( _options->at("enable-standby-votes-tracking").as<bool>() );
}
if( _options->count("replay-blockchain") || _options->count("revalidate-blockchain") )
_chain_db->wipe( _data_dir / "blockchain", false );
try
{
// these flags are used in open() only, i. e. during replay
uint32_t skip;
if( _options->count("revalidate-blockchain") ) // see also handle_block()
{
if( !loaded_checkpoints.empty() )
wlog( "Warning - revalidate will not validate before last checkpoint" );
if( _options->count("force-validate") )
skip = graphene::chain::database::skip_nothing;
else
skip = graphene::chain::database::skip_transaction_signatures;
}
else // no revalidate, skip most checks
skip = graphene::chain::database::skip_witness_signature |
graphene::chain::database::skip_block_size_check |
graphene::chain::database::skip_merkle_check |
graphene::chain::database::skip_transaction_signatures |
graphene::chain::database::skip_transaction_dupe_check |
graphene::chain::database::skip_tapos_check |
graphene::chain::database::skip_witness_schedule_check;
graphene::chain::detail::with_skip_flags( *_chain_db, skip, [this,&initial_state] () {
_chain_db->open( _data_dir / "blockchain", initial_state, GRAPHENE_CURRENT_DB_VERSION );
});
}
catch( const fc::exception& e )
{
elog( "Caught exception ${e} in open(), you might want to force a replay", ("e", e.to_detail_string()) );
throw;
}
if( _options->count("force-validate") )
{
ilog( "All transaction signatures will be validated" );
_force_validate = true;
}
if ( _options->count("enable-subscribe-to-all") )
_app_options.enable_subscribe_to_all = _options->at( "enable-subscribe-to-all" ).as<bool>();
set_api_limit();
if( _active_plugins.find( "market_history" ) != _active_plugins.end() )
_app_options.has_market_history_plugin = true;
if( _options->count("api-access") ) {
fc::path api_access_file = _options->at("api-access").as<boost::filesystem::path>();
FC_ASSERT( fc::exists(api_access_file),
"Failed to load file from ${path}", ("path", api_access_file) );
_apiaccess = fc::json::from_file( api_access_file ).as<api_access>( 20 );
ilog( "Using api access file from ${path}",
("path", api_access_file) );
}
else
{
// TODO: Remove this generous default access policy
// when the UI logs in properly
_apiaccess = api_access();
api_access_info wild_access;
wild_access.password_hash_b64 = "*";
wild_access.password_salt_b64 = "*";
wild_access.allowed_apis.push_back( "database_api" );
wild_access.allowed_apis.push_back( "network_broadcast_api" );
wild_access.allowed_apis.push_back( "history_api" );
wild_access.allowed_apis.push_back( "orders_api" );
_apiaccess.permission_map["*"] = wild_access;
}
reset_p2p_node(_data_dir);
reset_websocket_server();
reset_websocket_tls_server();
} FC_LOG_AND_RETHROW() }
optional< api_access_info > application_impl::get_api_access_info(const string& username)const
{
optional< api_access_info > result;
auto it = _apiaccess.permission_map.find(username);
if( it == _apiaccess.permission_map.end() )
{
it = _apiaccess.permission_map.find("*");
if( it == _apiaccess.permission_map.end() )
return result;
}
return it->second;
}
void application_impl::set_api_access_info(const string& username, api_access_info&& permissions)
{
_apiaccess.permission_map.insert(std::make_pair(username, std::move(permissions)));
}
/**
* If delegate has the item, the network has no need to fetch it.
*/
bool application_impl::has_item(const net::item_id& id)
{
try
{
if( id.item_type == graphene::net::block_message_type )
return _chain_db->is_known_block(id.item_hash);
else
return _chain_db->is_known_transaction(id.item_hash);
}
FC_CAPTURE_AND_RETHROW( (id) )
}
/**
* @brief allows the application to validate an item prior to broadcasting to peers.
*
* @param sync_mode true if the message was fetched through the sync process, false during normal operation
* @returns true if this message caused the blockchain to switch forks, false if it did not
*
* @throws exception if error validating the item, otherwise the item is safe to broadcast on.
*/
bool application_impl::handle_block(const graphene::net::block_message& blk_msg, bool sync_mode,
std::vector<fc::uint160_t>& contained_transaction_message_ids)
{ try {
auto latency = fc::time_point::now() - blk_msg.block.timestamp;
if (!sync_mode || blk_msg.block.block_num() % 10000 == 0)
{
const auto& witness = blk_msg.block.witness(*_chain_db);
const auto& witness_account = witness.witness_account(*_chain_db);
auto last_irr = _chain_db->get_dynamic_global_properties().last_irreversible_block_num;
ilog("Got block: #${n} ${bid} time: ${t} transaction(s): ${x} latency: ${l} ms from: ${w} irreversible: ${i} (-${d})",
("t",blk_msg.block.timestamp)
("n", blk_msg.block.block_num())
("bid", blk_msg.block.id())
("x", blk_msg.block.transactions.size())
("l", (latency.count()/1000))
("w",witness_account.name)
("i",last_irr)("d",blk_msg.block.block_num()-last_irr) );
}
FC_ASSERT( (latency.count()/1000) > -5000, "Rejecting block with timestamp in the future" );
try {
const uint32_t skip = (_is_block_producer | _force_validate) ?
database::skip_nothing : database::skip_transaction_signatures;
bool result = valve.do_serial( [this,&blk_msg,skip] () {
_chain_db->precompute_parallel( blk_msg.block, skip ).wait();
}, [this,&blk_msg,skip] () {
// TODO: in the case where this block is valid but on a fork that's too old for us to switch to,
// you can help the network code out by throwing a block_older_than_undo_history exception.
// when the net code sees that, it will stop trying to push blocks from that chain, but
// leave that peer connected so that they can get sync blocks from us
return _chain_db->push_block( blk_msg.block, skip );
});
// the block was accepted, so we now know all of the transactions contained in the block
if (!sync_mode)
{
// if we're not in sync mode, there's a chance we will be seeing some transactions
// included in blocks before we see the free-floating transaction itself. If that
// happens, there's no reason to fetch the transactions, so construct a list of the
// transaction message ids we no longer need.
// during sync, it is unlikely that we'll see any old
contained_transaction_message_ids.reserve( contained_transaction_message_ids.size()
+ blk_msg.block.transactions.size() );
for (const processed_transaction& transaction : blk_msg.block.transactions)
{
graphene::net::trx_message transaction_message(transaction);
contained_transaction_message_ids.emplace_back(graphene::net::message(transaction_message).id());
}
}
return result;
} catch ( const graphene::chain::unlinkable_block_exception& e ) {
// translate to a graphene::net exception
elog("Error when pushing block:\n${e}", ("e", e.to_detail_string()));
FC_THROW_EXCEPTION( graphene::net::unlinkable_block_exception,
"Error when pushing block:\n${e}",
("e", e.to_detail_string()) );
} catch( const fc::exception& e ) {
elog("Error when pushing block:\n${e}", ("e", e.to_detail_string()));
throw;
}
if( !_is_finished_syncing && !sync_mode )
{
_is_finished_syncing = true;
_self->syncing_finished();
}
} FC_CAPTURE_AND_RETHROW( (blk_msg)(sync_mode) ) return false; }
void application_impl::handle_transaction(const graphene::net::trx_message& transaction_message)
{ try {
static fc::time_point last_call;
static int trx_count = 0;
++trx_count;
auto now = fc::time_point::now();
if( now - last_call > fc::seconds(1) ) {
ilog("Got ${c} transactions from network", ("c",trx_count) );
last_call = now;
trx_count = 0;
}
_chain_db->precompute_parallel( transaction_message.trx ).wait();
_chain_db->push_transaction( transaction_message.trx );
} FC_CAPTURE_AND_RETHROW( (transaction_message) ) }
void application_impl::handle_message(const message& message_to_process)
{
// not a transaction, not a block
FC_THROW( "Invalid Message Type" );
}
bool application_impl::is_included_block(const block_id_type& block_id)
{
uint32_t block_num = block_header::num_from_id(block_id);
block_id_type block_id_in_preferred_chain = _chain_db->get_block_id_for_num(block_num);
return block_id == block_id_in_preferred_chain;
}
/**
* Assuming all data elements are ordered in some way, this method should
* return up to limit ids that occur *after* the last ID in synopsis that
* we recognize.
*
* On return, remaining_item_count will be set to the number of items
* in our blockchain after the last item returned in the result,
* or 0 if the result contains the last item in the blockchain
*/
std::vector<item_hash_t> application_impl::get_block_ids(const std::vector<item_hash_t>& blockchain_synopsis,
uint32_t& remaining_item_count,
uint32_t limit)
{ try {
vector<block_id_type> result;
remaining_item_count = 0;
if( _chain_db->head_block_num() == 0 )
return result;
result.reserve(limit);
block_id_type last_known_block_id;
if (blockchain_synopsis.empty() ||
(blockchain_synopsis.size() == 1 && blockchain_synopsis[0] == block_id_type()))
{
// peer has sent us an empty synopsis meaning they have no blocks.
// A bug in old versions would cause them to send a synopsis containing block 000000000
// when they had an empty blockchain, so pretend they sent the right thing here.
// do nothing, leave last_known_block_id set to zero
}
else
{
bool found_a_block_in_synopsis = false;
for (const item_hash_t& block_id_in_synopsis : boost::adaptors::reverse(blockchain_synopsis))
if (block_id_in_synopsis == block_id_type() ||
(_chain_db->is_known_block(block_id_in_synopsis) && is_included_block(block_id_in_synopsis)))
{
last_known_block_id = block_id_in_synopsis;
found_a_block_in_synopsis = true;
break;
}
if (!found_a_block_in_synopsis)
FC_THROW_EXCEPTION( graphene::net::peer_is_on_an_unreachable_fork,
"Unable to provide a list of blocks starting at any of the blocks in peer's synopsis" );
}
for( uint32_t num = block_header::num_from_id(last_known_block_id);
num <= _chain_db->head_block_num() && result.size() < limit;
++num )
if( num > 0 )
result.push_back(_chain_db->get_block_id_for_num(num));
if( !result.empty() && block_header::num_from_id(result.back()) < _chain_db->head_block_num() )
remaining_item_count = _chain_db->head_block_num() - block_header::num_from_id(result.back());
return result;
} FC_CAPTURE_AND_RETHROW( (blockchain_synopsis)(remaining_item_count)(limit) ) }
/**
* Given the hash of the requested data, fetch the body.
*/
message application_impl::get_item(const item_id& id)
{ try {
// ilog("Request for item ${id}", ("id", id));
if( id.item_type == graphene::net::block_message_type )
{
auto opt_block = _chain_db->fetch_block_by_id(id.item_hash);
if( !opt_block )
elog("Couldn't find block ${id} -- corresponding ID in our chain is ${id2}",
("id", id.item_hash)("id2", _chain_db->get_block_id_for_num(block_header::num_from_id(id.item_hash))));
FC_ASSERT( opt_block.valid() );
// ilog("Serving up block #${num}", ("num", opt_block->block_num()));
return block_message(std::move(*opt_block));
}
return trx_message( _chain_db->get_recent_transaction( id.item_hash ) );
} FC_CAPTURE_AND_RETHROW( (id) ) }
chain_id_type application_impl::get_chain_id() const
{
return _chain_db->get_chain_id();
}
/**
* Returns a synopsis of the blockchain used for syncing. This consists of a list of
* block hashes at intervals exponentially increasing towards the genesis block.
* When syncing to a peer, the peer uses this data to determine if we're on the same
* fork as they are, and if not, what blocks they need to send us to get us on their
* fork.
*
* In the over-simplified case, this is a straighforward synopsis of our current
* preferred blockchain; when we first connect up to a peer, this is what we will be sending.
* It looks like this:
* If the blockchain is empty, it will return the empty list.
* If the blockchain has one block, it will return a list containing just that block.
* If it contains more than one block:
* the first element in the list will be the hash of the highest numbered block that
* we cannot undo
* the second element will be the hash of an item at the half way point in the undoable
* segment of the blockchain
* the third will be ~3/4 of the way through the undoable segment of the block chain
* the fourth will be at ~7/8...
* &c.
* the last item in the list will be the hash of the most recent block on our preferred chain
* so if the blockchain had 26 blocks labeled a - z, the synopsis would be:
* a n u x z
* the idea being that by sending a small (<30) number of block ids, we can summarize a huge
* blockchain. The block ids are more dense near the end of the chain where because we are
* more likely to be almost in sync when we first connect, and forks are likely to be short.
* If the peer we're syncing with in our example is on a fork that started at block 'v',
* then they will reply to our synopsis with a list of all blocks starting from block 'u',
* the last block they know that we had in common.
*
* In the real code, there are several complications.
*
* First, as an optimization, we don't usually send a synopsis of the entire blockchain, we
* send a synopsis of only the segment of the blockchain that we have undo data for. If their
* fork doesn't build off of something in our undo history, we would be unable to switch, so there's
* no reason to fetch the blocks.
*
* Second, when a peer replies to our initial synopsis and gives us a list of the blocks they think
* we are missing, they only send a chunk of a few thousand blocks at once. After we get those
* block ids, we need to request more blocks by sending another synopsis (we can't just say "send me
* the next 2000 ids" because they may have switched forks themselves and they don't track what
* they've sent us). For faster performance, we want to get a fairly long list of block ids first,
* then start downloading the blocks.
* The peer doesn't handle these follow-up block id requests any different from the initial request;
* it treats the synopsis we send as our blockchain and bases its response entirely off that. So to
* get the response we want (the next chunk of block ids following the last one they sent us, or,
* failing that, the shortest fork off of the last list of block ids they sent), we need to construct
* a synopsis as if our blockchain was made up of:
* 1. the blocks in our block chain up to the fork point (if there is a fork) or the head block (if no fork)
* 2. the blocks we've already pushed from their fork (if there's a fork)
* 3. the block ids they've previously sent us
* Segment 3 is handled in the p2p code, it just tells us the number of blocks it has (in
* number_of_blocks_after_reference_point) so we can leave space in the synopsis for them.
* We're responsible for constructing the synopsis of Segments 1 and 2 from our active blockchain and
* fork database. The reference_point parameter is the last block from that peer that has been
* successfully pushed to the blockchain, so that tells us whether the peer is on a fork or on
* the main chain.
*/
std::vector<item_hash_t> application_impl::get_blockchain_synopsis(const item_hash_t& reference_point,
uint32_t number_of_blocks_after_reference_point)
{ try {
std::vector<item_hash_t> synopsis;
synopsis.reserve(30);
uint32_t high_block_num;
uint32_t non_fork_high_block_num;
uint32_t low_block_num = _chain_db->last_non_undoable_block_num();
std::vector<block_id_type> fork_history;
if (reference_point != item_hash_t())
{
// the node is asking for a summary of the block chain up to a specified
// block, which may or may not be on a fork
// for now, assume it's not on a fork
if (is_included_block(reference_point))
{
// reference_point is a block we know about and is on the main chain
uint32_t reference_point_block_num = block_header::num_from_id(reference_point);
assert(reference_point_block_num > 0);
high_block_num = reference_point_block_num;
non_fork_high_block_num = high_block_num;
if (reference_point_block_num < low_block_num)
{
// we're on the same fork (at least as far as reference_point) but we've passed
// reference point and could no longer undo that far if we diverged after that
// block. This should probably only happen due to a race condition where
// the network thread calls this function, and then immediately pushes a bunch of blocks,
// then the main thread finally processes this function.
// with the current framework, there's not much we can do to tell the network
// thread what our current head block is, so we'll just pretend that
// our head is actually the reference point.
// this *may* enable us to fetch blocks that we're unable to push, but that should
// be a rare case (and correctly handled)
low_block_num = reference_point_block_num;
}
}
else
{
// block is a block we know about, but it is on a fork
try
{
fork_history = _chain_db->get_block_ids_on_fork(reference_point);
// returns a vector where the last element is the common ancestor with the preferred chain,
// and the first element is the reference point you passed in
assert(fork_history.size() >= 2);
if( fork_history.front() != reference_point )
{
edump( (fork_history)(reference_point) );
assert(fork_history.front() == reference_point);
}
block_id_type last_non_fork_block = fork_history.back();
fork_history.pop_back(); // remove the common ancestor
boost::reverse(fork_history);
if (last_non_fork_block == block_id_type()) // if the fork goes all the way back to genesis (does graphene's fork db allow this?)
non_fork_high_block_num = 0;
else
non_fork_high_block_num = block_header::num_from_id(last_non_fork_block);
high_block_num = non_fork_high_block_num + fork_history.size();
assert(high_block_num == block_header::num_from_id(fork_history.back()));
}
catch (const fc::exception& e)
{
// unable to get fork history for some reason. maybe not linked?
// we can't return a synopsis of its chain
elog( "Unable to construct a blockchain synopsis for reference hash ${hash}: ${exception}",
("hash", reference_point)("exception", e) );
throw;
}
if (non_fork_high_block_num < low_block_num)
{
wlog("Unable to generate a usable synopsis because the peer we're generating it for forked too long ago "
"(our chains diverge after block #${non_fork_high_block_num} but only undoable to block #${low_block_num})",
("low_block_num", low_block_num)
("non_fork_high_block_num", non_fork_high_block_num));
FC_THROW_EXCEPTION(graphene::net::block_older_than_undo_history, "Peer is are on a fork I'm unable to switch to");
}
}
}
else
{
// no reference point specified, summarize the whole block chain
high_block_num = _chain_db->head_block_num();
non_fork_high_block_num = high_block_num;
if (high_block_num == 0)
return synopsis; // we have no blocks
}
if( low_block_num == 0)
low_block_num = 1;
// at this point:
// low_block_num is the block before the first block we can undo,
// non_fork_high_block_num is the block before the fork (if the peer is on a fork, or otherwise it is the same as high_block_num)
// high_block_num is the block number of the reference block, or the end of the chain if no reference provided
// true_high_block_num is the ending block number after the network code appends any item ids it
// knows about that we don't
uint32_t true_high_block_num = high_block_num + number_of_blocks_after_reference_point;
do
{
// for each block in the synopsis, figure out where to pull the block id from.
// if it's <= non_fork_high_block_num, we grab it from the main blockchain;
// if it's not, we pull it from the fork history
if (low_block_num <= non_fork_high_block_num)
synopsis.push_back(_chain_db->get_block_id_for_num(low_block_num));
else
synopsis.push_back(fork_history[low_block_num - non_fork_high_block_num - 1]);
low_block_num += (true_high_block_num - low_block_num + 2) / 2;
}
while (low_block_num <= high_block_num);
//idump((synopsis));
return synopsis;
} FC_CAPTURE_AND_RETHROW() }
/**
* Call this after the call to handle_message succeeds.
*
* @param item_type the type of the item we're synchronizing, will be the same as item passed to the sync_from() call
* @param item_count the number of items known to the node that haven't been sent to handle_item() yet.
* After `item_count` more calls to handle_item(), the node will be in sync
*/
void application_impl::sync_status(uint32_t item_type, uint32_t item_count)
{
// any status reports to GUI go here
}
/**
* Call any time the number of connected peers changes.
*/
void application_impl::connection_count_changed(uint32_t c)
{
// any status reports to GUI go here
}
uint32_t application_impl::get_block_number(const item_hash_t& block_id)
{ try {
return block_header::num_from_id(block_id);
} FC_CAPTURE_AND_RETHROW( (block_id) ) }
/**
* Returns the time a block was produced (if block_id = 0, returns genesis time).
* If we don't know about the block, returns time_point_sec::min()
*/
fc::time_point_sec application_impl::get_block_time(const item_hash_t& block_id)
{ try {
auto opt_block = _chain_db->fetch_block_by_id( block_id );
if( opt_block.valid() ) return opt_block->timestamp;
return fc::time_point_sec::min();
} FC_CAPTURE_AND_RETHROW( (block_id) ) }
item_hash_t application_impl::get_head_block_id() const
{
return _chain_db->head_block_id();
}
uint32_t application_impl::estimate_last_known_fork_from_git_revision_timestamp(uint32_t unix_timestamp) const
{
return 0; // there are no forks in graphene
}
void application_impl::error_encountered(const std::string& message, const fc::oexception& error)
{
// notify GUI or something cool
}
uint8_t application_impl::get_current_block_interval_in_seconds() const
{
return _chain_db->get_global_properties().parameters.block_interval;
}
} } } // namespace graphene namespace app namespace detail
namespace graphene { namespace app {
application::application()
: my(new detail::application_impl(this))
{}
application::~application()
{
if( my->_p2p_network )
{
my->_p2p_network->close();
my->_p2p_network.reset();
}
if( my->_chain_db )
{
my->_chain_db->close();