8ac4bc1d58
Reasons: 1. The protocol should not depend upon implementation details such as how the database objects are structured or reflected 2. The protocol should deal in abstract concepts 3. Should use fc::datastream rather than istringstream for performance and memory allocation reasons 4. Fees should be charged proportional to the size of the operation 5. Validate on the assert operation should also perform sanity checks on types 6. Protocol definition objects should never depend upon the database because they may be used in situations where the database and evaluators are not present. 7. Reflected field names should never have '_' in them because they become part of the *PUBLIC* json definition.
75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
/*
|
|
* Copyright (c) 2015, Cryptonomex, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is provided for evaluation in private test networks only, until September 8, 2015. After this date, this license expires and
|
|
* the code may not be used, modified or distributed for any purpose. Redistribution and use in source and binary forms, with or without modification,
|
|
* are permitted until September 8, 2015, provided that the following conditions are met:
|
|
*
|
|
* 1. The code and/or derivative works are used only for private test networks consisting of no more than 10 P2P nodes.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
|
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <graphene/chain/assert_evaluator.hpp>
|
|
#include <graphene/chain/database.hpp>
|
|
#include <graphene/chain/predicate.hpp>
|
|
|
|
#include <sstream>
|
|
|
|
namespace graphene { namespace chain {
|
|
|
|
struct predicate_visitor
|
|
{
|
|
typedef bool result_type;
|
|
const database& db;
|
|
|
|
predicate_visitor( const database& d ):db(d){}
|
|
|
|
bool operator()( const verify_account_name& p )const
|
|
{
|
|
return p.account_id(db).name == p.account_name;
|
|
}
|
|
bool operator()( const verify_symbol& p )const
|
|
{
|
|
return p.asset_id(db).symbol == p.symbol;
|
|
}
|
|
};
|
|
|
|
void_result assert_evaluator::do_evaluate( const assert_operation& o )
|
|
{
|
|
const database& _db = db();
|
|
uint32_t skip = _db.get_node_properties().skip_flags;
|
|
|
|
if( skip & database::skip_assert_evaluation )
|
|
return void_result();
|
|
|
|
for( const vector<char>& pdata : o.predicates )
|
|
{
|
|
fc::datastream<const char*> ds( pdata.data(), pdata.size() );
|
|
predicate p;
|
|
try {
|
|
fc::raw::unpack( ds, p );
|
|
} catch ( const fc::exception& e )
|
|
{
|
|
if( skip & database::skip_unknown_predicate )
|
|
continue;
|
|
throw;
|
|
}
|
|
FC_ASSERT( p.visit( predicate_visitor( _db ) ) );
|
|
}
|
|
return void_result();
|
|
}
|
|
|
|
void_result assert_evaluator::do_apply( const assert_operation& o )
|
|
{
|
|
// assert_operation is always a no-op
|
|
return void_result();
|
|
}
|
|
|
|
} } // graphene::chain
|