182 lines
6.6 KiB
C++
182 lines
6.6 KiB
C++
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/*
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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/exceptions.hpp>
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#include <graphene/chain/protocol/confidential.hpp>
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#include <graphene/chain/confidential_evaluator.hpp>
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#include <graphene/chain/confidential_object.hpp>
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#include <graphene/chain/database.hpp>
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#include <graphene/chain/fba_accumulator_id.hpp>
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#include <graphene/chain/hardfork.hpp>
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namespace graphene { namespace chain {
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void_result transfer_to_blind_evaluator::do_evaluate( const transfer_to_blind_operation& o )
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{ try {
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const auto& d = db();
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const auto& atype = o.amount.asset_id(db());
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FC_ASSERT( atype.allow_confidential() );
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FC_ASSERT( !atype.is_transfer_restricted() );
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FC_ASSERT( !(atype.options.flags & white_list) );
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for( const auto& out : o.outputs )
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{
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for( const auto& a : out.owner.account_auths )
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a.first(d); // verify all accounts exist and are valid
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}
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return void_result();
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} FC_CAPTURE_AND_RETHROW( (o) ) }
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void_result transfer_to_blind_evaluator::do_apply( const transfer_to_blind_operation& o )
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{ try {
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db().adjust_balance( o.from, -o.amount );
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const auto& add = o.amount.asset_id(db()).dynamic_asset_data_id(db()); // verify fee is a legit asset
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db().modify( add, [&]( asset_dynamic_data_object& obj ){
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obj.confidential_supply += o.amount.amount;
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FC_ASSERT( obj.confidential_supply >= 0 );
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});
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for( const auto& out : o.outputs )
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{
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db().create<blinded_balance_object>( [&]( blinded_balance_object& obj ){
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obj.asset_id = o.amount.asset_id;
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obj.owner = out.owner;
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obj.commitment = out.commitment;
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});
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}
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return void_result();
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} FC_CAPTURE_AND_RETHROW( (o) ) }
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void transfer_to_blind_evaluator::pay_fee()
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{
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if( db().head_block_time() >= HARDFORK_563_TIME )
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pay_fba_fee( fba_accumulator_id_transfer_to_blind );
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else
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generic_evaluator::pay_fee();
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}
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void_result transfer_from_blind_evaluator::do_evaluate( const transfer_from_blind_operation& o )
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{ try {
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const auto& d = db();
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o.fee.asset_id(d); // verify fee is a legit asset
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const auto& bbi = d.get_index_type<blinded_balance_index>();
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const auto& cidx = bbi.indices().get<by_commitment>();
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for( const auto& in : o.inputs )
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{
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auto itr = cidx.find( in.commitment );
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FC_ASSERT( itr != cidx.end() );
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FC_ASSERT( itr->asset_id == o.fee.asset_id );
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FC_ASSERT( itr->owner == in.owner );
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}
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return void_result();
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} FC_CAPTURE_AND_RETHROW( (o) ) }
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void_result transfer_from_blind_evaluator::do_apply( const transfer_from_blind_operation& o )
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{ try {
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db().adjust_balance( o.fee_payer(), o.fee );
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db().adjust_balance( o.to, o.amount );
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const auto& bbi = db().get_index_type<blinded_balance_index>();
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const auto& cidx = bbi.indices().get<by_commitment>();
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for( const auto& in : o.inputs )
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{
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auto itr = cidx.find( in.commitment );
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FC_ASSERT( itr != cidx.end() );
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db().remove( *itr );
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}
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const auto& add = o.amount.asset_id(db()).dynamic_asset_data_id(db()); // verify fee is a legit asset
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db().modify( add, [&]( asset_dynamic_data_object& obj ){
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obj.confidential_supply -= o.amount.amount + o.fee.amount;
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FC_ASSERT( obj.confidential_supply >= 0 );
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});
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return void_result();
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} FC_CAPTURE_AND_RETHROW( (o) ) }
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void transfer_from_blind_evaluator::pay_fee()
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{
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if( db().head_block_time() >= HARDFORK_563_TIME )
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pay_fba_fee( fba_accumulator_id_transfer_from_blind );
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else
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generic_evaluator::pay_fee();
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}
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void_result blind_transfer_evaluator::do_evaluate( const blind_transfer_operation& o )
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{ try {
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const auto& d = db();
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o.fee.asset_id(db()); // verify fee is a legit asset
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const auto& bbi = db().get_index_type<blinded_balance_index>();
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const auto& cidx = bbi.indices().get<by_commitment>();
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for( const auto& out : o.outputs )
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{
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for( const auto& a : out.owner.account_auths )
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a.first(d); // verify all accounts exist and are valid
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}
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for( const auto& in : o.inputs )
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{
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auto itr = cidx.find( in.commitment );
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GRAPHENE_ASSERT( itr != cidx.end(), blind_transfer_unknown_commitment, "", ("commitment",in.commitment) );
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FC_ASSERT( itr->asset_id == o.fee.asset_id );
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FC_ASSERT( itr->owner == in.owner );
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}
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return void_result();
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} FC_CAPTURE_AND_RETHROW( (o) ) }
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void_result blind_transfer_evaluator::do_apply( const blind_transfer_operation& o )
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{ try {
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db().adjust_balance( o.fee_payer(), o.fee ); // deposit the fee to the temp account
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const auto& bbi = db().get_index_type<blinded_balance_index>();
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const auto& cidx = bbi.indices().get<by_commitment>();
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for( const auto& in : o.inputs )
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{
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auto itr = cidx.find( in.commitment );
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GRAPHENE_ASSERT( itr != cidx.end(), blind_transfer_unknown_commitment, "", ("commitment",in.commitment) );
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db().remove( *itr );
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}
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for( const auto& out : o.outputs )
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{
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db().create<blinded_balance_object>( [&]( blinded_balance_object& obj ){
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obj.asset_id = o.fee.asset_id;
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obj.owner = out.owner;
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obj.commitment = out.commitment;
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});
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}
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const auto& add = o.fee.asset_id(db()).dynamic_asset_data_id(db());
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db().modify( add, [&]( asset_dynamic_data_object& obj ){
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obj.confidential_supply -= o.fee.amount;
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FC_ASSERT( obj.confidential_supply >= 0 );
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});
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return void_result();
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} FC_CAPTURE_AND_RETHROW( (o) ) }
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void blind_transfer_evaluator::pay_fee()
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{
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if( db().head_block_time() >= HARDFORK_563_TIME )
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pay_fba_fee( fba_accumulator_id_blind_transfer );
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else
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generic_evaluator::pay_fee();
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}
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} } // graphene::chain
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