peerplays_migrated/libraries/chain/transfer_evaluator.cpp

/*
 * Copyright (c) 2015 Cryptonomex, Inc., and contributors.  All rights reserved.
 *
 * 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/transfer_evaluator.hpp>
#include <graphene/chain/account_object.hpp>
#include <graphene/chain/exceptions.hpp>

namespace graphene { namespace chain {
void_result transfer_evaluator::do_evaluate( const transfer_operation& op )
{ try {
   
   database& d = db();

   const account_object& from_account    = op.from(d);
   const account_object& to_account      = op.to(d);
   const asset_object&   asset_type      = op.amount.asset_id(d);
   const asset_object&   fee_asset_type  = op.fee.asset_id(d);

   try {

      if( asset_type.options.flags & white_list )
      {
         GRAPHENE_ASSERT(
            from_account.is_authorized_asset( asset_type ),
            transfer_from_account_not_whitelisted,
            "'from' account ${from} is not whitelisted for asset ${asset}",
            ("from",op.from)
            ("asset",op.amount.asset_id)
            );
         GRAPHENE_ASSERT(
            to_account.is_authorized_asset( asset_type ),
            transfer_to_account_not_whitelisted,
            "'to' account ${to} is not whitelisted for asset ${asset}",
            ("to",op.to)
            ("asset",op.amount.asset_id)
            );
      }

      if( fee_asset_type.options.flags & white_list )
         FC_ASSERT( from_account.is_authorized_asset( asset_type ) );

      if( asset_type.is_transfer_restricted() )
      {
         GRAPHENE_ASSERT(
            from_account.id == asset_type.issuer || to_account.id == asset_type.issuer,
            transfer_restricted_transfer_asset,
            "Asset {asset} has transfer_restricted flag enabled",
            ("asset", op.amount.asset_id)
          );
      }

      bool insufficient_balance = d.get_balance( from_account, asset_type ).amount >= op.amount.amount;
      FC_ASSERT( insufficient_balance,
                 "Insufficient Balance: ${balance}, unable to transfer '${total_transfer}' from account '${a}' to '${t}'", 
                 ("a",from_account.name)("t",to_account.name)("total_transfer",d.to_pretty_string(op.amount))("balance",d.to_pretty_string(d.get_balance(from_account, asset_type))) );

      return void_result();
   } FC_RETHROW_EXCEPTIONS( error, "Unable to transfer ${a} from ${f} to ${t}", ("a",d.to_pretty_string(op.amount))("f",op.from(d).name)("t",op.to(d).name) );

}  FC_CAPTURE_AND_RETHROW( (op) ) }

void_result transfer_evaluator::do_apply( const transfer_operation& o )
{ try {
   db().adjust_balance( o.from, -o.amount );
   db().adjust_balance( o.to, o.amount );
   return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }



void_result override_transfer_evaluator::do_evaluate( const override_transfer_operation& op )
{ try {
   database& d = db();

   const asset_object&   asset_type      = op.amount.asset_id(d);
   GRAPHENE_ASSERT(
      asset_type.can_override(),
      override_transfer_not_permitted,
      "override_transfer not permitted for asset ${asset}",
      ("asset", op.amount.asset_id)
      );
   FC_ASSERT( asset_type.issuer == op.issuer );

   const account_object& from_account    = op.from(d);
   const account_object& to_account      = op.to(d);
   const asset_object&   fee_asset_type  = op.fee.asset_id(d);

   if( asset_type.options.flags & white_list )
   {
      FC_ASSERT( to_account.is_authorized_asset( asset_type ) );
      FC_ASSERT( from_account.is_authorized_asset( asset_type ) );
   }

   if( fee_asset_type.options.flags & white_list )
      FC_ASSERT( from_account.is_authorized_asset( asset_type ) );

   FC_ASSERT( d.get_balance( from_account, asset_type ).amount >= op.amount.amount,
              "", ("total_transfer",op.amount)("balance",d.get_balance(from_account, asset_type).amount) );

   return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }

void_result override_transfer_evaluator::do_apply( const override_transfer_operation& o )
{ try {
   db().adjust_balance( o.from, -o.amount );
   db().adjust_balance( o.to, o.amount );
   return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }

} } // graphene::chain