From 6e554260e54fc3ebca59a0ac87c696b795090ca9 Mon Sep 17 00:00:00 2001 From: Daniel Larimer Date: Fri, 23 Oct 2015 13:26:11 -0400 Subject: [PATCH] Issue #393 - HARDFORK to give cash back upon canceling an order --- libraries/chain/market_evaluator.cpp | 27 ++++++++++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-) diff --git a/libraries/chain/market_evaluator.cpp b/libraries/chain/market_evaluator.cpp index c9bd3e9c..a93e7578 100644 --- a/libraries/chain/market_evaluator.cpp +++ b/libraries/chain/market_evaluator.cpp @@ -92,12 +92,33 @@ asset limit_order_cancel_evaluator::do_apply(const limit_order_cancel_operation& auto quote_asset = _order->sell_price.quote.asset_id; auto refunded = _order->amount_for_sale(); - db().cancel_order(*_order, false /* don't create a virtual op*/); + if( true ) // HARD FORK d.head_block_time() > + { + const auto& fees = d.current_fee_schedule(); + asset create_fee = fees.calculate_fee( limit_order_create_operation() ); + + // then the create fee was only the network fee and not the + // full create_fee + const auto& gprops = d.get_global_properties(); + auto cashback_percent = GRAPHENE_100_PERCENT - gprops.parameters.network_percent_of_fee; + auto cashback_amount = (create_fee.amount * cashback_percent) / GRAPHENE_100_PERCENT; + create_fee.amount -= cashback_amount; + + const auto& core_asset_data = asset_id_type(0)(d).dynamic_asset_data_id(d); + d.modify( core_asset_data, [&]( asset_dynamic_data_object& addo ) { + addo.accumulated_fees -= create_fee.amount; + }); + + d.adjust_balance( o.fee_paying_account, create_fee ); + } + + + d.cancel_order(*_order, false /* don't create a virtual op*/); // Possible optimization: order can be called by canceling a limit order iff the canceled order was at the top of the book. // Do I need to check calls in both assets? - db().check_call_orders(base_asset(d)); - db().check_call_orders(quote_asset(d)); + d.check_call_orders(base_asset(d)); + d.check_call_orders(quote_asset(d)); return refunded; } FC_CAPTURE_AND_RETHROW( (o) ) }