157 lines
6.2 KiB
C++
157 lines
6.2 KiB
C++
/*
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* Copyright (c) 2015 Cryptonomex, Inc., and contributors.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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*
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* 1. Any modified source or binaries are used only with the BitShares network.
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*
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* 2. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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*
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* 3. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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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/database.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.enforce_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_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_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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} } // graphene::chain
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