275 lines
9.4 KiB
C++
275 lines
9.4 KiB
C++
/*
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* Copyright (c) 2015 Cryptonomex, Inc., and contributors.
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*
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* The MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <graphene/chain/database.hpp>
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#include <graphene/chain/asset_object.hpp>
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#include <graphene/chain/chain_property_object.hpp>
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#include <graphene/chain/global_property_object.hpp>
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#include <graphene/chain/son_object.hpp>
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#include <graphene/chain/son_proposal_object.hpp>
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#include <fc/smart_ref_impl.hpp>
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#include <ctime>
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#include <algorithm>
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namespace graphene { namespace chain {
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const asset_object& database::get_core_asset() const
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{
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return get(asset_id_type());
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}
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const global_property_object& database::get_global_properties()const
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{
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return get( global_property_id_type() );
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}
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const chain_property_object& database::get_chain_properties()const
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{
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return get( chain_property_id_type() );
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}
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const dynamic_global_property_object& database::get_dynamic_global_properties() const
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{
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return get( dynamic_global_property_id_type() );
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}
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const fee_schedule& database::current_fee_schedule()const
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{
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return get_global_properties().parameters.current_fees;
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}
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time_point_sec database::head_block_time()const
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{
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return get( dynamic_global_property_id_type() ).time;
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}
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uint32_t database::head_block_num()const
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{
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return get( dynamic_global_property_id_type() ).head_block_number;
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}
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block_id_type database::head_block_id()const
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{
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return get( dynamic_global_property_id_type() ).head_block_id;
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}
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decltype( chain_parameters::block_interval ) database::block_interval( )const
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{
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return get_global_properties().parameters.block_interval;
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}
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const chain_id_type& database::get_chain_id( )const
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{
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return get_chain_properties().chain_id;
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}
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const node_property_object& database::get_node_properties()const
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{
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return _node_property_object;
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}
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node_property_object& database::node_properties()
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{
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return _node_property_object;
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}
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uint32_t database::last_non_undoable_block_num() const
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{
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return head_block_num() - _undo_db.size();
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}
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std::vector<uint32_t> database::get_seeds(asset_id_type for_asset, uint8_t count_winners) const
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{
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FC_ASSERT( count_winners <= 64 );
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std::string salted_string = std::string(_random_number_generator._seed) + std::to_string(for_asset.instance.value);
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uint32_t* seeds = (uint32_t*)(fc::sha256::hash(salted_string)._hash);
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std::vector<uint32_t> result;
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result.reserve(64);
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for( int s = 0; s < 8; ++s ) {
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uint32_t* sub_seeds = ( uint32_t* ) fc::sha256::hash( std::to_string( seeds[s] ) + std::to_string( for_asset.instance.value ) )._hash;
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for( int ss = 0; ss < 8; ++ss ) {
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result.push_back(sub_seeds[ss]);
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}
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}
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return result;
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}
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const std::vector<uint32_t> database::get_winner_numbers( asset_id_type for_asset, uint32_t count_members, uint8_t count_winners ) const
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{
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std::vector<uint32_t> result;
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if( count_members < count_winners ) count_winners = count_members;
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if( count_winners == 0 ) return result;
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result.reserve(count_winners);
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auto seeds = get_seeds(for_asset, count_winners);
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for (auto current_seed = seeds.begin(); current_seed != seeds.end(); ++current_seed) {
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uint8_t winner_num = *current_seed % count_members;
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while( std::find(result.begin(), result.end(), winner_num) != result.end() ) {
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*current_seed = (*current_seed * 1103515245 + 12345) / 65536; //using gcc's consts for pseudorandom
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winner_num = *current_seed % count_members;
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}
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result.push_back(winner_num);
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if (result.size() >= count_winners) break;
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}
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FC_ASSERT(result.size() == count_winners);
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return result;
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}
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std::set<son_id_type> database::get_sons_being_deregistered()
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{
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std::set<son_id_type> ret;
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const auto& son_proposal_idx = get_index_type<son_proposal_index>().indices().get< by_id >();
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for( auto& son_proposal : son_proposal_idx )
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{
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if(son_proposal.proposal_type == son_proposal_type::son_deregister_proposal)
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{
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ret.insert(son_proposal.son_id);
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}
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}
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return ret;
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}
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std::set<son_id_type> database::get_sons_to_be_deregistered()
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{
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std::set<son_id_type> ret;
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const auto& son_idx = get_index_type<son_index>().indices().get< by_id >();
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for( auto& son : son_idx )
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{
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if(son.status == son_status::in_maintenance)
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{
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auto stats = son.statistics(*this);
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// TODO : We need to add a function that returns if we can deregister SON
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// i.e. with introduction of PW code, we have to make a decision if the SON
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// is needed for release of funds from the PW
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if(head_block_time() - stats.last_down_timestamp >= fc::hours(SON_DEREGISTER_TIME))
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{
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ret.insert(son.id);
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}
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}
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}
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return ret;
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}
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std::set<son_id_type> database::get_sons_being_reported_down()
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{
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std::set<son_id_type> ret;
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const auto& son_proposal_idx = get_index_type<son_proposal_index>().indices().get< by_id >();
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for( auto& son_proposal : son_proposal_idx )
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{
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if(son_proposal.proposal_type == son_proposal_type::son_report_down_proposal)
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{
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ret.insert(son_proposal.son_id);
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}
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}
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return ret;
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}
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fc::optional<operation> database::create_son_deregister_proposal(const son_id_type& son_id, const witness_object& current_witness )
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{
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son_delete_operation son_dereg_op;
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son_dereg_op.payer = current_witness.witness_account;
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son_dereg_op.son_id = son_id;
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proposal_create_operation proposal_op;
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proposal_op.fee_paying_account = current_witness.witness_account;
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proposal_op.proposed_ops.push_back( op_wrapper( son_dereg_op ) );
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uint32_t lifetime = ( get_global_properties().parameters.block_interval * get_global_properties().active_witnesses.size() ) * 3;
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proposal_op.expiration_time = time_point_sec( head_block_time().sec_since_epoch() + lifetime );
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return proposal_op;
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}
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signed_transaction database::create_signed_transaction( const fc::ecc::private_key& signing_private_key, const operation& op )
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{
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signed_transaction processed_trx;
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auto dyn_props = get_dynamic_global_properties();
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processed_trx.set_reference_block( dyn_props.head_block_id );
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processed_trx.set_expiration( head_block_time() + get_global_properties().parameters.maximum_time_until_expiration );
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processed_trx.operations.push_back( op );
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current_fee_schedule().set_fee( processed_trx.operations.back() );
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processed_trx.sign( signing_private_key, get_chain_id() );
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return processed_trx;
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}
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void database::process_son_proposals( const witness_object& current_witness, const fc::ecc::private_key& private_key )
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{
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const auto& son_proposal_idx = get_index_type<son_proposal_index>().indices().get< by_id >();
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const auto& proposal_idx = get_index_type<proposal_index>().indices().get< by_id >();
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auto approve_proposal = [ & ]( const proposal_id_type& id )
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{
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proposal_update_operation puo;
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puo.fee_paying_account = current_witness.witness_account;
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puo.proposal = id;
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puo.active_approvals_to_add = { current_witness.witness_account };
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_pending_tx.insert( _pending_tx.begin(), create_signed_transaction( private_key, puo ) );
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};
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for( auto& son_proposal : son_proposal_idx )
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{
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const auto& proposal = proposal_idx.find( son_proposal.proposal_id );
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FC_ASSERT( proposal != proposal_idx.end() );
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if( proposal->proposer == current_witness.witness_account)
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{
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approve_proposal( proposal->id );
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}
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}
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}
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void database::remove_son_proposal( const proposal_object& proposal )
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{ try {
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if( proposal.proposed_transaction.operations.size() == 1 &&
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( proposal.proposed_transaction.operations.back().which() == operation::tag<son_delete_operation>::value ||
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proposal.proposed_transaction.operations.back().which() == operation::tag<son_report_down_operation>::value) )
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{
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const auto& son_proposal_idx = get_index_type<son_proposal_index>().indices().get<by_proposal>();
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auto son_proposal_itr = son_proposal_idx.find( proposal.id );
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if( son_proposal_itr == son_proposal_idx.end() ) {
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return;
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}
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remove( *son_proposal_itr );
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}
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} FC_CAPTURE_AND_RETHROW( (proposal) ) }
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bool database::is_son_dereg_valid( const son_id_type& son_id )
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{
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const auto& son_idx = get_index_type<son_index>().indices().get< by_id >();
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auto son = son_idx.find( son_id );
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FC_ASSERT( son != son_idx.end() );
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bool ret = ( son->status == son_status::in_maintenance &&
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(head_block_time() - son->statistics(*this).last_down_timestamp >= fc::hours(SON_DEREGISTER_TIME)));
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return ret;
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}
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} }
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