void pay_current_ask( const market_transaction& mtrx, asset_record& base_asset )
{ try {
FC_ASSERT( _current_ask->type == ask_order );
FC_ASSERT( mtrx.ask_type == ask_order );
_current_ask->state.balance -= mtrx.ask_paid.amount;
FC_ASSERT( _current_ask->state.balance >= 0 );
auto ask_balance_address = withdraw_condition( withdraw_with_signature(mtrx.ask_owner), _quote_id ).get_address();
auto ask_payout = _pending_state->get_balance_record( ask_balance_address );
if( !ask_payout )
ask_payout = balance_record( mtrx.ask_owner, asset(0,_quote_id), 0 );
ask_payout->balance += mtrx.ask_received.amount;
ask_payout->last_update = _pending_state->now();
ask_payout->deposit_date = _pending_state->now();
_pending_state->store_balance_record( *ask_payout );
// if the balance is less than 1 XTS * PRICE < .001 USD XTS goes to fees
if( (_current_ask->get_quantity() * _current_ask->get_price()).amount == 0 )
{
base_asset.collected_fees += _current_ask->get_quantity().amount;
_current_ask->state.balance = 0;
}
_pending_state->store_ask_record( _current_ask->market_index, _current_ask->state );
} FC_CAPTURE_AND_RETHROW( (mtrx) ) } // pay_current_ask
void pay_current_bid( const market_transaction& mtrx, asset_record& quote_asset )
{ try {
FC_ASSERT( _current_bid->type == bid_order );
FC_ASSERT( mtrx.bid_type == bid_order );
_current_bid->state.balance -= mtrx.bid_paid.amount;
FC_ASSERT( _current_bid->state.balance >= 0 );
auto bid_payout = _pending_state->get_balance_record(
withdraw_condition( withdraw_with_signature(mtrx.bid_owner), _base_id ).get_address() );
if( !bid_payout )
bid_payout = balance_record( mtrx.bid_owner, asset(0,_base_id), 0 );
bid_payout->balance += mtrx.bid_received.amount;
bid_payout->last_update = _pending_state->now();
bid_payout->deposit_date = _pending_state->now();
_pending_state->store_balance_record( *bid_payout );
// if the balance is less than 1 XTS then it gets collected as fees.
if( (_current_bid->get_quote_quantity() * _current_bid->get_price()).amount == 0 )
{
quote_asset.collected_fees += _current_bid->get_quote_quantity().amount;
_current_bid->state.balance = 0;
}
_pending_state->store_bid_record( _current_bid->market_index, _current_bid->state );
} FC_CAPTURE_AND_RETHROW( (mtrx) ) }
void cancel_current_short( market_transaction& mtrx, const asset_id_type& quote_asset_id )
{
FC_ASSERT( _current_bid->type == short_order );
FC_ASSERT( mtrx.bid_type == short_order );
elog( "Canceling current short" );
edump( (mtrx) );
// Create automatic market cancel transaction
mtrx.ask_paid = asset();
mtrx.ask_received = asset( 0, quote_asset_id );
mtrx.bid_received = _current_bid->get_balance();
mtrx.bid_paid = asset( 0, quote_asset_id );
mtrx.bid_collateral.reset();
// Fund refund balance record
const balance_id_type id = withdraw_condition( withdraw_with_signature( mtrx.bid_owner ), 0 ).get_address();
obalance_record bid_payout = _pending_state->get_balance_record( id );
if( !bid_payout.valid() )
bid_payout = balance_record( mtrx.bid_owner, asset( 0, 0 ), 0 );
bid_payout->balance += mtrx.bid_received.amount;
bid_payout->last_update = _pending_state->now();
bid_payout->deposit_date = _pending_state->now();
_pending_state->store_balance_record( *bid_payout );
// Remove short order
_current_bid->state.balance = 0;
_pending_state->store_short_record( _current_bid->market_index, _current_bid->state );
}
void ad_operation::evaluate( transaction_evaluation_state& eval_state )const
{ try {
if( this->amount.amount <= 0 )
FC_CAPTURE_AND_THROW( negative_deposit, (amount) );
FC_ASSERT( !message.empty() );
FC_ASSERT( amount.asset_id == 0 );
const size_t message_kb = (message.size() / 1024) + 1;
const share_type required_fee = message_kb * BTS_BLOCKCHAIN_MIN_AD_FEE;
FC_ASSERT( amount.amount >= required_fee, "Message of size ${s} KiB requires at least ${a} satoshis to be pay!",
("s",message_kb)("a",required_fee) );
// half of the note fees goto collected fees(delegate pay), other go to ad owner
eval_state.min_fees[amount.asset_id] += required_fee;
FC_ASSERT( owner_account_id != 0 );
const oaccount_record owner_account_rec = eval_state.pending_state()->get_account_record( abs( this->owner_account_id ) );
FC_ASSERT( owner_account_rec.valid() );
auto owner_address = owner_account_rec->active_address();
auto ad_income_balance = eval_state.pending_state()->get_balance_record(withdraw_condition( withdraw_with_signature(owner_address), 0 ).get_address());
if( !ad_income_balance )
ad_income_balance = balance_record( owner_address, asset(0, 0), 0 );
auto ad_pay = amount.amount - required_fee;
ad_income_balance->balance += ad_pay;
ad_income_balance->last_update = eval_state.pending_state()->now();
ad_income_balance->deposit_date = eval_state.pending_state()->now();
eval_state.pending_state()->store_balance_record( *ad_income_balance );
eval_state.sub_balance( asset(ad_pay, amount.asset_id) );
// checking the signature of the publisher.
FC_ASSERT( publisher_account_id != 0 );
const oaccount_record publisher_account_rec = eval_state.pending_state()->get_account_record( abs( this->publisher_account_id ) );
FC_ASSERT( publisher_account_rec.valid() );
eval_state.check_signature( publisher_account_rec->active_key() );
ad_record record;
record.index.account_id = owner_account_id;
record.index.transaction_id = eval_state.trx.id();
record.publisher_id = publisher_account_id;
record.amount = amount;
record.message = message;
record.signer = message_signature;
// the message must be signed by the claimed publisher account
FC_ASSERT( publisher_account_rec->active_key() == record.signer_key() );
FC_ASSERT( !eval_state.pending_state()->get_ad_record( record.index ).valid() );
eval_state.pending_state()->store_ad_record( std::move( record ) );
} FC_CAPTURE_AND_RETHROW( (*this) ) }
void transaction_evaluation_state::evaluate_deposit( const deposit_operation& op )
{ try {
auto deposit_balance_id = op.balance_id();
auto delegate_record = _current_state->get_name_record( op.condition.delegate_id );
if( !delegate_record ) fail( BTS_INVALID_NAME_ID, fc::variant(op) );
if( !delegate_record->is_delegate() ) fail( BTS_INVALID_DELEGATE_ID, fc::variant(op) );
auto cur_record = _current_state->get_balance_record( deposit_balance_id );
if( !cur_record )
{
cur_record = balance_record( op.condition );
}
cur_record->last_update = _current_state->now();
cur_record->balance += op.amount;
sub_balance( deposit_balance_id, asset(op.amount, cur_record->condition.asset_id) );
if( cur_record->condition.asset_id == 0 )
add_vote( cur_record->condition.delegate_id, op.amount );
_current_state->store_balance_record( *cur_record );
} FC_RETHROW_EXCEPTIONS( warn, "", ("op",op) ) }
void deposit_operation::evaluate( transaction_evaluation_state& eval_state )const
{ try {
if( this->amount <= 0 )
FC_CAPTURE_AND_THROW( negative_deposit, (amount) );
switch( withdraw_condition_types( this->condition.type ) )
{
case withdraw_signature_type:
case withdraw_multisig_type:
case withdraw_escrow_type:
break;
default:
FC_CAPTURE_AND_THROW( invalid_withdraw_condition, (*this) );
}
const balance_id_type deposit_balance_id = this->balance_id();
obalance_record cur_record = eval_state.pending_state()->get_balance_record( deposit_balance_id );
if( !cur_record.valid() )
{
cur_record = balance_record( this->condition );
if( this->condition.type == withdraw_escrow_type )
cur_record->meta_data = variant_object("creating_transaction_id", eval_state.trx.id() );
}
if( cur_record->balance == 0 )
{
cur_record->deposit_date = eval_state.pending_state()->now();
}
else
{
fc::uint128 old_sec_since_epoch( cur_record->deposit_date.sec_since_epoch() );
fc::uint128 new_sec_since_epoch( eval_state.pending_state()->now().sec_since_epoch() );
fc::uint128 avg = (old_sec_since_epoch * cur_record->balance) + (new_sec_since_epoch * this->amount);
avg /= (cur_record->balance + this->amount);
cur_record->deposit_date = time_point_sec( avg.to_integer() );
}
cur_record->balance += this->amount;
eval_state.sub_balance( asset( this->amount, cur_record->asset_id() ) );
if( cur_record->condition.asset_id == 0 && cur_record->condition.slate_id )
eval_state.adjust_vote( cur_record->condition.slate_id, this->amount );
cur_record->last_update = eval_state.pending_state()->now();
const oasset_record asset_rec = eval_state.pending_state()->get_asset_record( cur_record->condition.asset_id );
FC_ASSERT( asset_rec.valid() );
if( asset_rec->is_market_issued() )
{
FC_ASSERT( cur_record->condition.slate_id == 0 );
}
const auto& owners = cur_record->owners();
for( const address& owner : owners )
{
FC_ASSERT( asset_rec->address_is_whitelisted( owner ) );
}
eval_state.pending_state()->store_balance_record( *cur_record );
} FC_CAPTURE_AND_RETHROW( (*this) ) }
void execute( asset_id_type quote_id, asset_id_type base_id, const fc::time_point_sec& timestamp )
{
try {
_quote_id = quote_id;
_base_id = base_id;
auto quote_asset = _pending_state->get_asset_record( _quote_id );
// DISABLE MARKET ISSUED ASSETS
if( quote_asset->is_market_issued() )
return; // don't execute anything.
// the order book is soreted from low to high price, so to get the last item (highest bid), we need to go to the first item in the
// next market class and then back up one
auto next_pair = base_id+1 == quote_id ? price( 0, quote_id+1, 0) : price( 0, quote_id, base_id+1 );
_bid_itr = _db_impl._bid_db.lower_bound( market_index_key( next_pair ) );
_ask_itr = _db_impl._ask_db.lower_bound( market_index_key( price( 0, quote_id, base_id) ) );
_short_itr = _db_impl._short_db.lower_bound( market_index_key( next_pair ) );
_collateral_itr = _db_impl._collateral_db.lower_bound( market_index_key( next_pair ) );
if( !_ask_itr.valid() )
{
wlog( "ask iter invalid..." );
_ask_itr = _db_impl._ask_db.begin();
}
if( _short_itr.valid() ) --_short_itr;
else _short_itr = _db_impl._short_db.last();
if( _bid_itr.valid() ) --_bid_itr;
else _bid_itr = _db_impl._bid_db.last();
if( _collateral_itr.valid() ) --_collateral_itr;
else _collateral_itr = _db_impl._collateral_db.last();
asset consumed_bid_depth(0,base_id);
asset consumed_ask_depth(0,base_id);
asset usd_fees_collected(0,quote_id);
asset trading_volume(0, base_id);
omarket_status market_stat = _pending_state->get_market_status( _quote_id, _base_id );
if( !market_stat.valid() )
{
if( quote_asset->is_market_issued() ) FC_CAPTURE_AND_THROW( insufficient_depth, (market_stat) );
FC_ASSERT( market_stat.valid() );
}
while( get_next_bid() && get_next_ask() )
{
idump( (_current_bid)(_current_ask) );
price ask_price = _current_ask->get_price();
// this works for bids, asks, and shorts.... but in the case of a cover
// the current ask can go lower than the call price in order to match
// the bid....
if( _current_ask->type == cover_order )
{
ask_price = std::min( _current_bid->get_price(), _current_ask->get_highest_cover_price() );
}
if( _current_bid->get_price() < ask_price )
break;
if( quote_asset->is_market_issued() )
{
if( !market_stat ||
market_stat->ask_depth < BTS_BLOCKCHAIN_MARKET_DEPTH_REQUIREMENT/2 ||
market_stat->bid_depth < BTS_BLOCKCHAIN_MARKET_DEPTH_REQUIREMENT/2
)
FC_CAPTURE_AND_THROW( insufficient_depth, (market_stat) );
}
auto quantity = std::min( _current_bid->get_quantity(), _current_ask->get_quantity() );
auto usd_paid_by_bid = quantity * _current_bid->get_price();
auto usd_received_by_ask = quantity * _current_ask->get_price();
auto xts_paid_by_ask = quantity;
auto xts_received_by_bid = quantity;
consumed_bid_depth += quantity;
consumed_ask_depth += quantity;
if( _current_bid->type == short_order )
{
usd_paid_by_bid = usd_received_by_ask;
}
if( _current_ask->type == cover_order )
{
usd_received_by_ask = usd_paid_by_bid;
}
FC_ASSERT( usd_paid_by_bid.amount >= 0 );
FC_ASSERT( xts_paid_by_ask.amount >= 0 );
FC_ASSERT( usd_received_by_ask.amount >= 0 );
FC_ASSERT( xts_received_by_bid.amount >= 0 );
FC_ASSERT( usd_paid_by_bid >= usd_received_by_ask );
FC_ASSERT( xts_paid_by_ask >= xts_received_by_bid );
// sanity check to keep supply from growing without bound
FC_ASSERT( usd_paid_by_bid < asset(quote_asset->maximum_share_supply,quote_id), "", ("usd_paid_by_bid",usd_paid_by_bid)("asset",quote_asset) );
usd_fees_collected += usd_paid_by_bid - usd_received_by_ask;
idump( (usd_fees_collected)(xts_paid_by_ask)(xts_received_by_bid)(quantity) );
market_transaction mtrx;
mtrx.bid_owner = _current_bid->get_owner();
mtrx.ask_owner = _current_ask->get_owner();
mtrx.bid_price = _current_bid->get_price();
mtrx.ask_price = ask_price;
mtrx.bid_paid = usd_paid_by_bid;
mtrx.bid_received = xts_received_by_bid;
mtrx.ask_paid = xts_paid_by_ask;
mtrx.ask_received = usd_received_by_ask;
mtrx.bid_type = _current_bid->type;
mtrx.fees_collected = xts_paid_by_ask - xts_received_by_bid;
_market_transactions.push_back(mtrx);
trading_volume += mtrx.bid_received;
market_stat->ask_depth -= xts_paid_by_ask.amount;
if( _current_ask->type == ask_order )
{
/* rounding errors on price cause this not to go to 0 in some cases */
if( quantity == _current_ask->get_quantity() )
_current_ask->state.balance = 0;
else
_current_ask->state.balance -= xts_paid_by_ask.amount;
FC_ASSERT( _current_ask->state.balance >= 0 );
auto ask_balance_address = withdraw_condition( withdraw_with_signature(_current_ask->get_owner()), quote_id ).get_address();
auto ask_payout = _pending_state->get_balance_record( ask_balance_address );
if( !ask_payout )
ask_payout = balance_record( _current_ask->get_owner(), asset(0,quote_id), 0 );
ask_payout->balance += usd_received_by_ask.amount;
ask_payout->last_update = _pending_state->now();
_pending_state->store_balance_record( *ask_payout );
_pending_state->store_ask_record( _current_ask->market_index, _current_ask->state );
}
else if( _current_ask->type == cover_order )
{
elog( "MATCHING COVER ORDER recv_usd: ${usd} paid_collat: ${c}",
("usd",usd_received_by_ask)("c",xts_paid_by_ask) );
wlog( "current ask: ${c}", ("c",_current_ask) );
// we are in the margin call range...
_current_ask->state.balance -= usd_received_by_ask.amount;
*(_current_ask->collateral) -= xts_paid_by_ask.amount;
FC_ASSERT( _current_ask->state.balance >= 0 );
FC_ASSERT( *_current_ask->collateral >= 0 );
if( _current_ask->state.balance == 0 ) // no more USD left
{ // send collateral home to mommy & daddy
wlog( " collateral balance is now 0!" );
auto ask_balance_address = withdraw_condition(
withdraw_with_signature(_current_ask->get_owner()),
base_id ).get_address();
auto ask_payout = _pending_state->get_balance_record( ask_balance_address );
if( !ask_payout )
ask_payout = balance_record( _current_ask->get_owner(), asset(0,base_id), 0 );
ask_payout->balance += (*_current_ask->collateral);
ask_payout->last_update = _pending_state->now();
_pending_state->store_balance_record( *ask_payout );
_current_ask->collateral = 0;
}
wlog( "storing collateral ${c}", ("c",_current_ask) );
_pending_state->store_collateral_record( _current_ask->market_index,
collateral_record( *_current_ask->collateral,
_current_ask->state.balance ) );
}
if( _current_bid->type == bid_order )
{
_current_bid->state.balance -= usd_paid_by_bid.amount;
FC_ASSERT( _current_bid->state.balance >= 0 );
auto bid_payout = _pending_state->get_balance_record(
withdraw_condition( withdraw_with_signature(_current_bid->get_owner()), base_id ).get_address() );
if( !bid_payout )
bid_payout = balance_record( _current_bid->get_owner(), asset(0,base_id), 0 );
bid_payout->balance += xts_received_by_bid.amount;
bid_payout->last_update = _pending_state->now();
_pending_state->store_balance_record( *bid_payout );
_pending_state->store_bid_record( _current_bid->market_index, _current_bid->state );
}
else if( _current_bid->type == short_order )
{
market_stat->bid_depth -= xts_received_by_bid.amount;
// TODO: what if the amount paid is 0 for bid and ask due to rounding errors,
// make sure this doesn't put us in an infinite loop.
if( quantity == _current_bid->get_quantity() )
_current_bid->state.balance = 0;
else
_current_bid->state.balance -= xts_received_by_bid.amount;
FC_ASSERT( _current_bid->state.balance >= 0 );
auto collateral = (xts_paid_by_ask + xts_received_by_bid).amount;
auto cover_price = usd_received_by_ask / asset( (3*collateral)/4, base_id );
market_index_key cover_index( cover_price, _current_ask->get_owner() );
auto ocover_record = _pending_state->get_collateral_record( cover_index );
if( NOT ocover_record )
ocover_record = collateral_record();
ocover_record->collateral_balance += collateral;
ocover_record->payoff_balance += usd_received_by_ask.amount;
FC_ASSERT( ocover_record->payoff_balance >= 0 );
FC_ASSERT( ocover_record->collateral_balance >= 0 );
_pending_state->store_collateral_record( cover_index, *ocover_record );
_pending_state->store_short_record( _current_bid->market_index, _current_bid->state );
}
} // while bid && ask
if( quote_asset->is_market_issued() )
{
if( !market_stat ||
market_stat->ask_depth < BTS_BLOCKCHAIN_MARKET_DEPTH_REQUIREMENT/2 ||
market_stat->bid_depth < BTS_BLOCKCHAIN_MARKET_DEPTH_REQUIREMENT/2
)
FC_CAPTURE_AND_THROW( insufficient_depth, (market_stat) );
}
_pending_state->store_market_status( *market_stat );
if( trading_volume.amount > 0 && get_next_bid() && get_next_ask() )
{
market_history_key key(quote_id, base_id, market_history_key::each_block, _db_impl._head_block_header.timestamp);
market_history_record new_record(_current_bid->get_price(), _current_ask->get_price(), trading_volume.amount);
//LevelDB iterators are dumb and don't support proper past-the-end semantics.
auto last_key_itr = _db_impl._market_history_db.lower_bound(key);
if( !last_key_itr.valid() )
last_key_itr = _db_impl._market_history_db.last();
else
--last_key_itr;
key.timestamp = timestamp;
//Unless the previous record for this market is the same as ours...
if( (!(last_key_itr.valid()
&& last_key_itr.key().quote_id == quote_id
&& last_key_itr.key().base_id == base_id
&& last_key_itr.key().granularity == market_history_key::each_block
&& last_key_itr.value() == new_record)) )
{
//...add a new entry to the history table.
_pending_state->market_history[key] = new_record;
}
fc::time_point_sec start_of_this_hour = timestamp - (timestamp.sec_since_epoch() % (60*60));
market_history_key old_key(quote_id, base_id, market_history_key::each_hour, start_of_this_hour);
if( auto opt = _db_impl._market_history_db.fetch_optional(old_key) )
{
auto old_record = *opt;
old_record.volume += new_record.volume;
if( new_record.highest_bid > old_record.highest_bid || new_record.lowest_ask < old_record.lowest_ask )
{
old_record.highest_bid = std::max(new_record.highest_bid, old_record.highest_bid);
old_record.lowest_ask = std::min(new_record.lowest_ask, old_record.lowest_ask);
_pending_state->market_history[old_key] = old_record;
}
}
else
_pending_state->market_history[old_key] = new_record;
fc::time_point_sec start_of_this_day = timestamp - (timestamp.sec_since_epoch() % (60*60*24));
old_key = market_history_key(quote_id, base_id, market_history_key::each_day, start_of_this_day);
if( auto opt = _db_impl._market_history_db.fetch_optional(old_key) )
{
auto old_record = *opt;
old_record.volume += new_record.volume;
if( new_record.highest_bid > old_record.highest_bid || new_record.lowest_ask < old_record.lowest_ask )
{
old_record.highest_bid = std::max(new_record.highest_bid, old_record.highest_bid);
old_record.lowest_ask = std::min(new_record.lowest_ask, old_record.lowest_ask);
_pending_state->market_history[old_key] = old_record;
}
}
else
_pending_state->market_history[old_key] = new_record;
}
auto market_state = _pending_state->get_market_status( quote_id, base_id );
if( !market_state )
market_state = market_status( quote_id, base_id, 0, 0 );
market_state->last_error.reset();
_pending_state->store_market_status( *market_state );
wlog( "done matching orders" );
_pending_state->apply_changes();
}
catch( const fc::exception& e )
{
wlog( "error executing market ${quote} / ${base}\n ${e}", ("quote",quote_id)("base",base_id)("e",e.to_detail_string()) );
auto market_state = _prior_state->get_market_status( quote_id, base_id );
if( !market_state )
market_state = market_status( quote_id, base_id, 0, 0 );
market_state->last_error = e;
_prior_state->store_market_status( *market_state );
}
} // execute(...)
void pay_current_cover( market_transaction& mtrx, asset_record& quote_asset )
{ try {
FC_ASSERT( _current_ask->type == cover_order );
FC_ASSERT( mtrx.ask_type == cover_order );
// we are in the margin call range...
_current_ask->state.balance -= mtrx.bid_paid.amount;
*(_current_ask->collateral) -= mtrx.ask_paid.amount;
FC_ASSERT( _current_ask->state.balance >= 0 );
FC_ASSERT( *_current_ask->collateral >= 0, "", ("mtrx",mtrx)("_current_ask", _current_ask) );
quote_asset.current_share_supply -= mtrx.ask_received.amount;
if( *_current_ask->collateral == 0 )
{
quote_asset.collected_fees -= _current_ask->state.balance;
_current_ask->state.balance = 0;
}
if( _current_ask->state.balance == 0 && *_current_ask->collateral > 0 ) // no more USD left
{ // send collateral home to mommy & daddy
//wlog( " collateral balance is now 0!" );
auto ask_balance_address = withdraw_condition(
withdraw_with_signature(_current_ask->get_owner()),
_base_id ).get_address();
auto ask_payout = _pending_state->get_balance_record( ask_balance_address );
if( !ask_payout )
ask_payout = balance_record( _current_ask->get_owner(), asset(0,_base_id), 0 );
auto left_over_collateral = (*_current_ask->collateral);
/** charge 5% fee for having a margin call */
auto fee = (left_over_collateral * 5000 )/100000;
left_over_collateral -= fee;
// when executing a cover order, it always takes the exact price of the
// highest bid, so there should be no fees paid *except* this.
FC_ASSERT( mtrx.fees_collected.amount == 0 );
// these go to the network... as dividends..
mtrx.fees_collected += asset( fee, _base_id );
ask_payout->balance += left_over_collateral;
ask_payout->last_update = _pending_state->now();
ask_payout->deposit_date = _pending_state->now();
_pending_state->store_balance_record( *ask_payout );
_current_ask->collateral = 0;
}
//ulog( "storing collateral ${c}", ("c",_current_ask) );
// the collateral position is now worse than before, if we don't update the market index then
// the index price will be "wrong"... ie: the call price should move up based upon the fact
// that we consumed more collateral than USD...
//
// If we leave it as is, then chances are we will end up covering the entire amount this time,
// but we cannot use the price on the call for anything other than a trigger.
_pending_state->store_collateral_record( _current_ask->market_index,
collateral_record( *_current_ask->collateral,
_current_ask->state.balance ) );
} FC_CAPTURE_AND_RETHROW( (mtrx) ) }
/**
* Process all fees and update the asset records.
*/
void transaction_evaluation_state::post_evaluate()
{ try {
required_fees += asset(_current_state->calculate_data_fee(fc::raw::pack_size(trx)),0);
balance[0]; // make sure we have something for this.
for( auto fee : balance )
{
if( fee.second < 0 ) FC_CAPTURE_AND_THROW( negative_fee, (fee) );
if( fee.second > 0 )
{
if( fee.first == 0 )
continue;
// check to see if there are any open bids to buy the asset
}
// lowest ask is someone with XTS offered at a price of USD / XTS, fee.first
// is an amount of USD which can be converted to price*USD XTS provided we
// send lowest_ask.index.owner the USD
omarket_order lowest_ask = _current_state->get_lowest_ask_record( fee.first, 0 );
if( lowest_ask )
{
// do we have enough funds in the ask to cover the fees?
asset required_order_balance = asset( fee.second, fee.first ) *
lowest_ask->market_index.order_price;
if( required_order_balance.amount <= lowest_ask->state.balance )
{
balance[0] += required_order_balance.amount;
auto balance_id = withdraw_condition(
withdraw_with_signature( lowest_ask->market_index.owner ),
fee.first ).get_address();
auto balance_rec = _current_state->get_balance_record( balance_id );
if( balance_rec )
{
balance_rec->balance += fee.second;
}
else
{
balance_rec = balance_record( lowest_ask->market_index.owner,
asset( fee.second, fee.first ), 0 );
}
_current_state->store_balance_record( *balance_rec );
lowest_ask->state.balance -= required_order_balance.amount;
_current_state->store_ask_record( lowest_ask->market_index, lowest_ask->state );
}
// trade fee.second
}
}
for( auto fee : balance )
{
if( fee.second < 0 ) FC_CAPTURE_AND_THROW( negative_fee, (fee) );
if( fee.second > 0 )
{
if( fee.first == 0 && fee.second < required_fees.amount )
FC_CAPTURE_AND_THROW( insufficient_fee, (fee)(required_fees.amount) );
auto asset_record = _current_state->get_asset_record( fee.first );
if( !asset_record )
FC_CAPTURE_AND_THROW( unknown_asset_id, (fee.first) );
asset_record->collected_fees += fee.second;
asset_record->current_share_supply -= fee.second;
_current_state->store_asset_record( *asset_record );
}
}
for( auto required_deposit : required_deposits )
{
auto provided_itr = provided_deposits.find( required_deposit.first );
if( provided_itr->second < required_deposit.second )
FC_CAPTURE_AND_THROW( missing_deposit, (required_deposit) );
}
} FC_RETHROW_EXCEPTIONS( warn, "" ) }
