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Fix bidding #1830

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merged 3 commits into from
Aug 20, 2019
Merged

Fix bidding #1830

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54e6850
Fixes #1692
pmconrad Jun 24, 2019
8d3f7fa
Wrapped long lines
pmconrad Aug 5, 2019
fc3e6b8
Added TODO about HF check
pmconrad Aug 5, 2019
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4 changes: 4 additions & 0 deletions libraries/chain/hardfork.d/CORE_1692.hf
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
// bitshares-core issue #1692 validation check of bid_collateral
#ifndef HARDFORK_CORE_1692_TIME
#define HARDFORK_CORE_1692_TIME (fc::time_point_sec( 1600000000 ) ) // Sep 2020
#endif
22 changes: 15 additions & 7 deletions libraries/chain/market_evaluator.cpp
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Expand Up @@ -391,13 +391,6 @@ void_result bid_collateral_evaluator::do_evaluate(const bid_collateral_operation

FC_ASSERT( !_bitasset_data->is_prediction_market, "Cannot bid on a prediction market!" );

if( o.additional_collateral.amount > 0 )
{
FC_ASSERT( d.get_balance(*_paying_account, _bitasset_data->options.short_backing_asset(d)) >= o.additional_collateral,
"Cannot bid ${c} collateral when payer only has ${b}", ("c", o.additional_collateral.amount)
("b", d.get_balance(*_paying_account, o.additional_collateral.asset_id(d)).amount) );
}

const collateral_bid_index& bids = d.get_index_type<collateral_bid_index>();
const auto& index = bids.indices().get<by_account>();
const auto& bid = index.find( boost::make_tuple( o.debt_covered.asset_id, o.bidder ) );
Expand All @@ -406,6 +399,21 @@ void_result bid_collateral_evaluator::do_evaluate(const bid_collateral_operation
else
FC_ASSERT( o.debt_covered.amount > 0, "Can't find bid to cancel?!");

if( o.additional_collateral.amount > 0 )
{
if( _bid && d.head_block_time() >= HARDFORK_CORE_1692_TIME )
{
asset delta = o.additional_collateral - _bid->get_additional_collateral();
FC_ASSERT( d.get_balance(*_paying_account, _bitasset_data->options.short_backing_asset(d)) >= delta,
"Cannot increase bid from ${oc} to ${nc} collateral when payer only has ${b}",
("oc", _bid->get_additional_collateral().amount)("nc", o.additional_collateral.amount)
("b", d.get_balance(*_paying_account, o.additional_collateral.asset_id(d)).amount) );
} else
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FC_ASSERT( d.get_balance(*_paying_account, _bitasset_data->options.short_backing_asset(d)) >= o.additional_collateral,
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"Cannot bid ${c} collateral when payer only has ${b}", ("c", o.additional_collateral.amount)
("b", d.get_balance(*_paying_account, o.additional_collateral.asset_id(d)).amount) );
}

return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }

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22 changes: 22 additions & 0 deletions tests/tests/swan_tests.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -406,6 +406,28 @@ BOOST_AUTO_TEST_CASE( recollateralize )
}
}

/** Creates a black swan, bid, adjust bid before/after hf_1692
*/
BOOST_AUTO_TEST_CASE( bid_issue_1692 )
{ try {
init_standard_swan( 700 );

generate_blocks( HARDFORK_CORE_1692_TIME - 30 );

int64_t b2_balance = get_balance( borrower2(), back() );
bid_collateral( borrower2(), back().amount(1000), swan().amount(100) );
BOOST_CHECK_EQUAL( get_balance( borrower2(), back() ), b2_balance - 1000 );
GRAPHENE_REQUIRE_THROW( bid_collateral( borrower2(), back().amount(b2_balance), swan().amount(200) ), fc::assert_exception );
GRAPHENE_REQUIRE_THROW( bid_collateral( borrower2(), back().amount(b2_balance-999), swan().amount(200) ), fc::assert_exception );
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generate_blocks( HARDFORK_CORE_1692_TIME + 30 );

bid_collateral( borrower2(), back().amount(b2_balance-999), swan().amount(200) );
BOOST_CHECK_EQUAL( get_balance( borrower2(), back() ), 999 );
bid_collateral( borrower2(), back().amount(b2_balance), swan().amount(200) );
BOOST_CHECK_EQUAL( get_balance( borrower2(), back() ), 0 );
} FC_LOG_AND_RETHROW() }

/** Creates a black swan, settles all debts, recovers price feed - asset should be revived
*/
BOOST_AUTO_TEST_CASE( revive_empty_recovered )
Expand Down