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Test case for #338 #343 #453 #606 #625 #649 fixes
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@abitmore
abitmore committed Apr 7, 2018
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251 changes: 251 additions & 0 deletions tests/tests/market_tests.cpp
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Expand Up @@ -229,5 +229,256 @@ BOOST_AUTO_TEST_CASE(issue_338_etc)

} FC_LOG_AND_RETHROW() }

/***
* Fixed bitshares-core issue #338 #343 #606 #625 #649
*/
BOOST_AUTO_TEST_CASE(hardfork_core_338_test)
{ try {
generate_blocks(HARDFORK_CORE_338_TIME); // assume all hard forks occur at same time
generate_block();

set_expiration( db, trx );

ACTORS((buyer)(seller)(borrower)(borrower2)(borrower3)(feedproducer));

const auto& bitusd = create_bitasset("USDBIT", feedproducer_id);
const auto& core = asset_id_type()(db);
asset_id_type usd_id = bitusd.id;
asset_id_type core_id = core.id;

int64_t init_balance(1000000);

transfer(committee_account, buyer_id, asset(init_balance));
transfer(committee_account, borrower_id, asset(init_balance));
transfer(committee_account, borrower2_id, asset(init_balance));
transfer(committee_account, borrower3_id, asset(init_balance));
update_feed_producers( bitusd, {feedproducer.id} );

price_feed current_feed;
current_feed.maintenance_collateral_ratio = 1750;
current_feed.maximum_short_squeeze_ratio = 1100;
current_feed.settlement_price = bitusd.amount( 1 ) / core.amount(5);
publish_feed( bitusd, feedproducer, current_feed );
// start out with 300% collateral, call price is 15/1.75 CORE/USD = 60/7
const call_order_object& call = *borrow( borrower, bitusd.amount(1000), asset(15000));
call_order_id_type call_id = call.id;
// create another position with 310% collateral, call price is 15.5/1.75 CORE/USD = 63/7
const call_order_object& call2 = *borrow( borrower2, bitusd.amount(1000), asset(15500));
call_order_id_type call2_id = call2.id;
// create yet another position with 320% collateral, call price is 16/1.75 CORE/USD = 64/7
const call_order_object& call3 = *borrow( borrower3, bitusd.amount(1000), asset(16000));
call_order_id_type call3_id = call3.id;
transfer(borrower, seller, bitusd.amount(1000));
transfer(borrower2, seller, bitusd.amount(1000));
transfer(borrower3, seller, bitusd.amount(1000));

BOOST_CHECK_EQUAL( 1000, call.debt.value );
BOOST_CHECK_EQUAL( 15000, call.collateral.value );
BOOST_CHECK_EQUAL( 1000, call2.debt.value );
BOOST_CHECK_EQUAL( 15500, call2.collateral.value );
BOOST_CHECK_EQUAL( 1000, call3.debt.value );
BOOST_CHECK_EQUAL( 16000, call3.collateral.value );
BOOST_CHECK_EQUAL( 3000, get_balance(seller, bitusd) );
BOOST_CHECK_EQUAL( 0, get_balance(seller, core) );

// adjust price feed to get call_order into margin call territory
current_feed.settlement_price = bitusd.amount( 1 ) / core.amount(10);
publish_feed( bitusd, feedproducer, current_feed );
// settlement price = 1/10, mssp = 1/11

// This sell order above MSSP will not be matched with a call
limit_order_id_type sell_high = create_sell_order(seller, bitusd.amount(7), core.amount(78))->id;

BOOST_CHECK_EQUAL( 2993, get_balance(seller, bitusd) );
BOOST_CHECK_EQUAL( 0, get_balance(seller, core) );

// This buy order is too low will not be matched with a sell order
limit_order_id_type buy_low = create_sell_order(buyer, asset(90), bitusd.amount(10))->id;
// This buy order at MSSP will be matched only if no margin call (margin call takes precedence)
limit_order_id_type buy_med = create_sell_order(buyer, asset(110), bitusd.amount(10))->id;
// This buy order above MSSP will be matched with a sell order (limit order with better price takes precedence)
limit_order_id_type buy_high = create_sell_order(buyer, asset(111), bitusd.amount(10))->id;

BOOST_CHECK_EQUAL( 0, get_balance(buyer, bitusd) );
BOOST_CHECK_EQUAL( init_balance - 90 - 110 - 111, get_balance(buyer, core) );

// This order slightly below the call price will be matched: #606 fixed
BOOST_CHECK( !create_sell_order(seller, bitusd.amount(700), core.amount(5900) ) );

// firstly it will match with buy_high, at buy_high's price: #625 fixed
BOOST_CHECK( !db.find<limit_order_object>( buy_high ) );
BOOST_CHECK_EQUAL( db.find<limit_order_object>( buy_med )->for_sale.value, 110 );
BOOST_CHECK_EQUAL( db.find<limit_order_object>( buy_low )->for_sale.value, 90 );

// buy_high pays 111 CORE, receives 10 USD goes to buyer's balance
BOOST_CHECK_EQUAL( 10, get_balance(buyer, bitusd) );
BOOST_CHECK_EQUAL( init_balance - 90 - 110 - 111, get_balance(buyer, core) );
// sell order pays 10 USD, receives 111 CORE, remaining 690 USD for sale, still at price 7/59

// then it will match with call, at mssp: 1/11 = 690/7590 : #338 fixed
BOOST_CHECK_EQUAL( 2293, get_balance(seller, bitusd) );
BOOST_CHECK_EQUAL( 7701, get_balance(seller, core) );
BOOST_CHECK_EQUAL( 310, call.debt.value );
BOOST_CHECK_EQUAL( 7410, call.collateral.value );
BOOST_CHECK_EQUAL( 1000, call2.debt.value );
BOOST_CHECK_EQUAL( 15500, call2.collateral.value );
BOOST_CHECK_EQUAL( 1000, call3.debt.value );
BOOST_CHECK_EQUAL( 16000, call3.collateral.value );

// call's call_price will be updated after the match, to 741/31/1.75 CORE/USD = 2964/217
// it's above settlement price (10/1) so won't be margin called again
BOOST_CHECK( price(asset(2964),asset(217,usd_id)) == call.call_price );

// This would match with call before, but would match with call2 after #343 fixed
BOOST_CHECK( !create_sell_order(seller, bitusd.amount(700), core.amount(6000) ) );
BOOST_CHECK_EQUAL( db.find<limit_order_object>( buy_med )->for_sale.value, 110 );
BOOST_CHECK_EQUAL( db.find<limit_order_object>( buy_low )->for_sale.value, 90 );

// fill price would be mssp: 1/11 = 700/7700 : #338 fixed
BOOST_CHECK_EQUAL( 1593, get_balance(seller, bitusd) );
BOOST_CHECK_EQUAL( 15401, get_balance(seller, core) );
BOOST_CHECK_EQUAL( 310, call.debt.value );
BOOST_CHECK_EQUAL( 7410, call.collateral.value );
BOOST_CHECK_EQUAL( 300, call2.debt.value );
BOOST_CHECK_EQUAL( 7800, call2.collateral.value );
BOOST_CHECK_EQUAL( 1000, call3.debt.value );
BOOST_CHECK_EQUAL( 16000, call3.collateral.value );
// call2's call_price will be updated after the match, to 78/3/1.75 CORE/USD = 312/21
BOOST_CHECK( price(asset(312),asset(21,usd_id)) == call2.call_price );
// it's above settlement price (10/1) so won't be margin called

// at this moment, collateralization of call is 7410 / 310 = 23.9
// collateralization of call2 is 7800 / 300 = 26
// collateralization of call3 is 16000 / 1000 = 16

// force settle
force_settle( seller, bitusd.amount(10) );

BOOST_CHECK_EQUAL( 1583, get_balance(seller, bitusd) );
BOOST_CHECK_EQUAL( 15401, get_balance(seller, core) );
BOOST_CHECK_EQUAL( 310, call.debt.value );
BOOST_CHECK_EQUAL( 7410, call.collateral.value );
BOOST_CHECK_EQUAL( 300, call2.debt.value );
BOOST_CHECK_EQUAL( 7800, call2.collateral.value );
BOOST_CHECK_EQUAL( 1000, call3.debt.value );
BOOST_CHECK_EQUAL( 16000, call3.collateral.value );

// generate blocks to let the settle order execute (price feed will expire after it)
generate_blocks( HARDFORK_CORE_338_TIME + fc::hours(25) );

// call3 get settled, at settlement price 1/10: #343 fixed
BOOST_CHECK_EQUAL( 1583, get_balance(seller, bitusd) );
BOOST_CHECK_EQUAL( 15501, get_balance(seller, core) );
BOOST_CHECK_EQUAL( 310, call_id(db).debt.value );
BOOST_CHECK_EQUAL( 7410, call_id(db).collateral.value );
BOOST_CHECK_EQUAL( 300, call2_id(db).debt.value );
BOOST_CHECK_EQUAL( 7800, call2_id(db).collateral.value );
BOOST_CHECK_EQUAL( 990, call3_id(db).debt.value );
BOOST_CHECK_EQUAL( 15900, call3_id(db).collateral.value );

set_expiration( db, trx );
update_feed_producers( usd_id(db), {feedproducer_id} );

// at this moment, collateralization of call is 7410 / 310 = 23.9
// collateralization of call2 is 7800 / 300 = 26
// collateralization of call3 is 15900 / 990 = 16.06

// adjust price feed to get call3 into black swan territory, but not the other call orders
current_feed.settlement_price = asset(1, usd_id) / asset(20, core_id);
publish_feed( usd_id(db), feedproducer_id(db), current_feed );
// settlement price = 1/20, mssp = 1/22

// black swan event will occur: #649 fixed
BOOST_CHECK( usd_id(db).bitasset_data(db).has_settlement() );
// short positions will be closed
BOOST_CHECK( !db.find<call_order_object>( call_id ) );
BOOST_CHECK( !db.find<call_order_object>( call2_id ) );
BOOST_CHECK( !db.find<call_order_object>( call3_id ) );

// generate a block
generate_block();


} FC_LOG_AND_RETHROW() }

/***
* Fixed bitshares-core issue #453
*/
BOOST_AUTO_TEST_CASE(hardfork_core_453_test)
{ try {
generate_blocks(HARDFORK_CORE_453_TIME);
generate_block();

set_expiration( db, trx );

ACTORS((buyer)(seller)(borrower)(borrower2)(borrower3)(feedproducer));

const auto& bitusd = create_bitasset("USDBIT", feedproducer_id);
const auto& core = asset_id_type()(db);
asset_id_type usd_id = bitusd.id;
asset_id_type core_id = core.id;

int64_t init_balance(1000000);

transfer(committee_account, buyer_id, asset(init_balance));
transfer(committee_account, borrower_id, asset(init_balance));
transfer(committee_account, borrower2_id, asset(init_balance));
transfer(committee_account, borrower3_id, asset(init_balance));
update_feed_producers( bitusd, {feedproducer.id} );

price_feed current_feed;
current_feed.maintenance_collateral_ratio = 1750;
current_feed.maximum_short_squeeze_ratio = 1100;
current_feed.settlement_price = bitusd.amount( 1 ) / core.amount(5);
publish_feed( bitusd, feedproducer, current_feed );
// start out with 300% collateral, call price is 15/1.75 CORE/USD = 60/7
const call_order_object& call = *borrow( borrower, bitusd.amount(1000), asset(15000));
call_order_id_type call_id = call.id;
// create another position with 310% collateral, call price is 15.5/1.75 CORE/USD = 63/7
const call_order_object& call2 = *borrow( borrower2, bitusd.amount(1000), asset(15500));
call_order_id_type call2_id = call2.id;
// create yet another position with 320% collateral, call price is 16/1.75 CORE/USD = 64/7
const call_order_object& call3 = *borrow( borrower3, bitusd.amount(1000), asset(16000));
call_order_id_type call3_id = call3.id;
transfer(borrower, seller, bitusd.amount(1000));
transfer(borrower2, seller, bitusd.amount(1000));
transfer(borrower3, seller, bitusd.amount(1000));

BOOST_CHECK_EQUAL( 1000, call.debt.value );
BOOST_CHECK_EQUAL( 15000, call.collateral.value );
BOOST_CHECK_EQUAL( 1000, call2.debt.value );
BOOST_CHECK_EQUAL( 15500, call2.collateral.value );
BOOST_CHECK_EQUAL( 1000, call3.debt.value );
BOOST_CHECK_EQUAL( 16000, call3.collateral.value );
BOOST_CHECK_EQUAL( 3000, get_balance(seller, bitusd) );
BOOST_CHECK_EQUAL( 0, get_balance(seller, core) );

// no margin call so far

// This order would match call when it's margin called, it has an amount same as call's debt which will be full filled later
limit_order_id_type sell_med = create_sell_order(seller_id(db), asset(1000, usd_id), asset(10000))->id; // 1/10
// Another big order above sell_med, amount bigger than call2's debt
limit_order_id_type sell_med2 = create_sell_order(seller_id(db), asset(1200, usd_id), asset(12120))->id; // 1/10.1
// Another small order above sell_med2
limit_order_id_type sell_med3 = create_sell_order(seller_id(db), asset(120, usd_id), asset(1224))->id; // 1/10.2

// adjust price feed to get the call orders into margin call territory
current_feed.settlement_price = bitusd.amount( 1 ) / core.amount(10);
publish_feed( bitusd, feedproducer, current_feed );
// settlement price = 1/10, mssp = 1/11

// Fixed #453 multiple order matching issue occurs
BOOST_CHECK( !db.find<limit_order_object>( sell_med ) ); // sell_med get filled
BOOST_CHECK( !db.find<limit_order_object>( sell_med2 ) ); // sell_med2 get filled
BOOST_CHECK( !db.find<limit_order_object>( sell_med3 ) ); // sell_med3 get filled
BOOST_CHECK( !db.find<call_order_object>( call_id ) ); // the first call order get filled
BOOST_CHECK( !db.find<call_order_object>( call2_id ) ); // the second call order get filled
BOOST_CHECK( db.find<call_order_object>( call3_id ) ); // the third call order is still there

// generate a block
generate_block();


} FC_LOG_AND_RETHROW() }

BOOST_AUTO_TEST_SUITE_END()

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