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peerplays_migrated/libraries/chain/asset_evaluator.cpp
Nathaniel e8b432c19f
Safety Check: Part 1 -- Evaluator Tagging 
Pursuant to the requested safety checks on the database, to ensure that
plugin code (i.e., third party code) cannot modify the database, we
implement evaluator tagging so the chain can distinguish between
consensus evaluators and third party evaluators. Also, define a new kind
of evaluator base class, third_party_evaluator, so that fees are not
charged multiple times for operations with multiple evaluators.

Next step, implement the actual safety check mechanism on the database.
2022-03-07 16:37:53 -06:00

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/*
* Copyright (c) 2015 Cryptonomex, Inc., and contributors.
*
* The MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <graphene/chain/asset_evaluator.hpp>
#include <graphene/chain/asset_object.hpp>
#include <graphene/chain/account_object.hpp>
#include <graphene/chain/balance_object.hpp>
#include <graphene/chain/market_object.hpp>
#include <graphene/chain/database.hpp>
#include <graphene/chain/exceptions.hpp>
#include <graphene/chain/hardfork.hpp>
#include <graphene/chain/is_authorized_asset.hpp>
#include <functional>
#include <boost/algorithm/string/case_conv.hpp>
namespace graphene { namespace chain {
void_result asset_create_evaluator::do_evaluate( const asset_create_operation& op )
{ try {
database& d = db();
FC_ASSERT(d.is_asset_creation_allowed(op.symbol), "Asset creation not allowed at current time");
const auto& chain_parameters = d.get_global_properties().parameters;
FC_ASSERT( op.common_options.whitelist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
FC_ASSERT( op.common_options.blacklist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
// Check that all authorities do exist
for( auto id : op.common_options.whitelist_authorities )
d.get_object(id);
for( auto id : op.common_options.blacklist_authorities )
d.get_object(id);
auto& asset_indx = d.get_index_type<asset_index>().indices().get<by_symbol>();
auto asset_symbol_itr = asset_indx.find( op.symbol );
FC_ASSERT( asset_symbol_itr == asset_indx.end() );
if( d.head_block_time() > HARDFORK_385_TIME )
{
if( d.head_block_time() <= HARDFORK_409_TIME )
{
auto dotpos = op.symbol.find( '.' );
if( dotpos != std::string::npos )
{
auto prefix = op.symbol.substr( 0, dotpos );
auto asset_symbol_itr = asset_indx.find( op.symbol );
FC_ASSERT( asset_symbol_itr != asset_indx.end(), "Asset ${s} may only be created by issuer of ${p}, but ${p} has not been registered",
("s",op.symbol)("p",prefix) );
FC_ASSERT( asset_symbol_itr->issuer == op.issuer, "Asset ${s} may only be created by issuer of ${p}, ${i}",
("s",op.symbol)("p",prefix)("i", op.issuer(d).name) );
}
}
else
{
auto dotpos = op.symbol.rfind( '.' );
if( dotpos != std::string::npos )
{
auto prefix = op.symbol.substr( 0, dotpos );
auto asset_symbol_itr = asset_indx.find( prefix );
FC_ASSERT( asset_symbol_itr != asset_indx.end(), "Asset ${s} may only be created by issuer of ${p}, but ${p} has not been registered",
("s",op.symbol)("p",prefix) );
FC_ASSERT( asset_symbol_itr->issuer == op.issuer, "Asset ${s} may only be created by issuer of ${p}, ${i}",
("s",op.symbol)("p",prefix)("i", op.issuer(d).name) );
}
}
}
else
{
auto dotpos = op.symbol.find( '.' );
if( dotpos != std::string::npos )
wlog( "Asset ${s} has a name which requires hardfork 385", ("s",op.symbol) );
}
// core_fee_paid -= core_fee_paid.value/2;
if( op.bitasset_opts )
{
const asset_object& backing = op.bitasset_opts->short_backing_asset(d);
if( backing.is_market_issued() )
{
const asset_bitasset_data_object& backing_bitasset_data = backing.bitasset_data(d);
const asset_object& backing_backing = backing_bitasset_data.options.short_backing_asset(d);
FC_ASSERT( !backing_backing.is_market_issued(),
"May not create a bitasset backed by a bitasset backed by a bitasset." );
FC_ASSERT( op.issuer != GRAPHENE_COMMITTEE_ACCOUNT || backing_backing.get_id() == asset_id_type(),
"May not create a blockchain-controlled market asset which is not backed by CORE.");
} else
FC_ASSERT( op.issuer != GRAPHENE_COMMITTEE_ACCOUNT || backing.get_id() == asset_id_type(),
"May not create a blockchain-controlled market asset which is not backed by CORE.");
FC_ASSERT( op.bitasset_opts->feed_lifetime_sec > chain_parameters.block_interval &&
op.bitasset_opts->force_settlement_delay_sec > chain_parameters.block_interval );
}
if( op.is_prediction_market )
{
FC_ASSERT( op.bitasset_opts );
FC_ASSERT( op.precision == op.bitasset_opts->short_backing_asset(d).precision );
}
return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
// copied from bitshares. (https://github.com/bitshares/bitshares-core/issues/429)
void asset_create_evaluator::pay_fee()
{
fee_is_odd = core_fee_paid.value & 1;
core_fee_paid -= core_fee_paid.value/2;
consensus_evaluator::pay_fee();
}
object_id_type asset_create_evaluator::do_apply( const asset_create_operation& op )
{ try {
database& d = db();
// includes changes from bitshares. (https://github.com/bitshares/bitshares-core/issues/429)
bool hf_429 = fee_is_odd && db().head_block_time() > HARDFORK_CORE_429_TIME;
const asset_dynamic_data_object& dyn_asset =
d.create<asset_dynamic_data_object>( [hf_429,this]( asset_dynamic_data_object& a ) {
a.current_supply = 0;
a.fee_pool = core_fee_paid - (hf_429 ? 1 : 0);
});
if( fee_is_odd && !hf_429 )
{
const auto& core_dd = d.get_core_asset().dynamic_data( d );
d.modify( core_dd, []( asset_dynamic_data_object& dd ) {
dd.current_supply++;
});
}
auto next_asset_id = d.get_index_type<asset_index>().get_next_id();
asset_bitasset_data_id_type bit_asset_id;
if( op.bitasset_opts.valid() )
bit_asset_id = d.create<asset_bitasset_data_object>( [&]( asset_bitasset_data_object& a ) {
a.options = *op.bitasset_opts;
a.is_prediction_market = op.is_prediction_market;
a.asset_id = next_asset_id;
}).id;
const asset_object& new_asset =
d.create<asset_object>( [&]( asset_object& a ) {
a.issuer = op.issuer;
a.symbol = op.symbol;
a.precision = op.precision;
a.options = op.common_options;
if( a.options.core_exchange_rate.base.asset_id.instance.value == 0 )
a.options.core_exchange_rate.quote.asset_id = next_asset_id;
else
a.options.core_exchange_rate.base.asset_id = next_asset_id;
a.dynamic_asset_data_id = dyn_asset.id;
if( op.bitasset_opts.valid() )
a.bitasset_data_id = bit_asset_id;
});
FC_ASSERT( new_asset.id == next_asset_id );
return new_asset.id;
} FC_CAPTURE_AND_RETHROW( (op) ) }
void_result lottery_asset_create_evaluator::do_evaluate( const lottery_asset_create_operation& op )
{ try {
database& d = db();
FC_ASSERT(d.is_asset_creation_allowed(op.symbol), "Lottery asset creation not allowed at current time");
const auto& chain_parameters = d.get_global_properties().parameters;
FC_ASSERT( op.common_options.whitelist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
FC_ASSERT( op.common_options.blacklist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
// Check that all authorities do exist
for( auto id : op.common_options.whitelist_authorities )
d.get_object(id);
for( auto id : op.common_options.blacklist_authorities )
d.get_object(id);
auto& asset_indx = d.get_index_type<asset_index>().indices().get<by_symbol>();
auto asset_symbol_itr = asset_indx.find( op.symbol );
FC_ASSERT( asset_symbol_itr == asset_indx.end() );
if( d.head_block_time() > HARDFORK_385_TIME )
{
if( d.head_block_time() <= HARDFORK_409_TIME )
{
auto dotpos = op.symbol.find( '.' );
if( dotpos != std::string::npos )
{
auto prefix = op.symbol.substr( 0, dotpos );
auto asset_symbol_itr = asset_indx.find( op.symbol );
FC_ASSERT( asset_symbol_itr != asset_indx.end(), "Asset ${s} may only be created by issuer of ${p}, but ${p} has not been registered",
("s",op.symbol)("p",prefix) );
FC_ASSERT( asset_symbol_itr->issuer == op.issuer, "Asset ${s} may only be created by issuer of ${p}, ${i}",
("s",op.symbol)("p",prefix)("i", op.issuer(d).name) );
}
}
else
{
auto dotpos = op.symbol.rfind( '.' );
if( dotpos != std::string::npos )
{
auto prefix = op.symbol.substr( 0, dotpos );
auto asset_symbol_itr = asset_indx.find( prefix );
FC_ASSERT( asset_symbol_itr != asset_indx.end(), "Asset ${s} may only be created by issuer of ${p}, but ${p} has not been registered",
("s",op.symbol)("p",prefix) );
FC_ASSERT( asset_symbol_itr->issuer == op.issuer, "Asset ${s} may only be created by issuer of ${p}, ${i}",
("s",op.symbol)("p",prefix)("i", op.issuer(d).name) );
}
}
}
else
{
auto dotpos = op.symbol.find( '.' );
if( dotpos != std::string::npos )
wlog( "Asset ${s} has a name which requires hardfork 385", ("s",op.symbol) );
}
// core_fee_paid -= core_fee_paid.value/2;
if( op.bitasset_opts )
{
const asset_object& backing = op.bitasset_opts->short_backing_asset(d);
if( backing.is_market_issued() )
{
const asset_bitasset_data_object& backing_bitasset_data = backing.bitasset_data(d);
const asset_object& backing_backing = backing_bitasset_data.options.short_backing_asset(d);
FC_ASSERT( !backing_backing.is_market_issued(),
"May not create a bitasset backed by a bitasset backed by a bitasset." );
FC_ASSERT( op.issuer != GRAPHENE_COMMITTEE_ACCOUNT || backing_backing.get_id() == asset_id_type(),
"May not create a blockchain-controlled market asset which is not backed by CORE.");
} else
FC_ASSERT( op.issuer != GRAPHENE_COMMITTEE_ACCOUNT || backing.get_id() == asset_id_type(),
"May not create a blockchain-controlled market asset which is not backed by CORE.");
FC_ASSERT( op.bitasset_opts->feed_lifetime_sec > chain_parameters.block_interval &&
op.bitasset_opts->force_settlement_delay_sec > chain_parameters.block_interval );
}
if( op.is_prediction_market )
{
FC_ASSERT( op.bitasset_opts );
FC_ASSERT( op.precision == op.bitasset_opts->short_backing_asset(d).precision );
}
FC_ASSERT( op.common_options.max_supply >= 5 );
auto lottery_options = op.extensions;
lottery_options.validate();
FC_ASSERT( lottery_options.end_date > d.head_block_time() || lottery_options.end_date == time_point_sec() );
return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
// copied from bitshares. (https://github.com/bitshares/bitshares-core/issues/429)
void lottery_asset_create_evaluator::pay_fee()
{
fee_is_odd = core_fee_paid.value & 1;
core_fee_paid -= core_fee_paid.value/2;
consensus_evaluator::pay_fee();
}
object_id_type lottery_asset_create_evaluator::do_apply( const lottery_asset_create_operation& op )
{ try {
database& d = db();
// includes changes from bitshares. (https://github.com/bitshares/bitshares-core/issues/429)
bool hf_429 = fee_is_odd && d.head_block_time() > HARDFORK_CORE_429_TIME;
const asset_dynamic_data_object& dyn_asset =
d.create<asset_dynamic_data_object>( [&]( asset_dynamic_data_object& a ) {
a.current_supply = 0;
a.fee_pool = core_fee_paid - (hf_429 ? 1 : 0);
});
if( fee_is_odd && !hf_429 )
{
const auto& core_dd = d.get<asset_object>( asset_id_type() ).dynamic_data( db() );
d.modify( core_dd, [=]( asset_dynamic_data_object& dd ) {
dd.current_supply++;
});
}
auto next_asset_id = d.get_index_type<asset_index>().get_next_id();
asset_bitasset_data_id_type bit_asset_id;
if( op.bitasset_opts.valid() )
bit_asset_id = d.create<asset_bitasset_data_object>( [&op,next_asset_id]( asset_bitasset_data_object& a ) {
a.options = *op.bitasset_opts;
a.is_prediction_market = op.is_prediction_market;
a.asset_id = next_asset_id;
}).id;
const asset_object& new_asset =
d.create<asset_object>( [&op,next_asset_id,&dyn_asset,bit_asset_id,&d]( asset_object& a ) {
a.issuer = op.issuer;
a.symbol = op.symbol;
a.precision = op.precision;
a.options = op.common_options;
a.precision = 0;
a.lottery_options = op.extensions;
//a.lottery_options->balance = asset( 0, a.lottery_options->ticket_price.asset_id );
a.lottery_options->owner = a.id;
d.create<lottery_balance_object>([&a](lottery_balance_object& lbo) {
lbo.lottery_id = a.id;
});
if( a.options.core_exchange_rate.base.asset_id.instance.value == 0 )
a.options.core_exchange_rate.quote.asset_id = next_asset_id;
else
a.options.core_exchange_rate.base.asset_id = next_asset_id;
a.dynamic_asset_data_id = dyn_asset.id;
if( op.bitasset_opts.valid() )
a.bitasset_data_id = bit_asset_id;
});
FC_ASSERT( new_asset.id == next_asset_id, "Unexpected object database error, object id mismatch" );
return new_asset.id;
} FC_CAPTURE_AND_RETHROW( (op) ) }
void_result asset_issue_evaluator::do_evaluate( const asset_issue_operation& o )
{ try {
const database& d = db();
const asset_object& a = o.asset_to_issue.asset_id(d);
FC_ASSERT( o.issuer == a.issuer );
FC_ASSERT( !a.is_market_issued(), "Cannot manually issue a market-issued asset." );
FC_ASSERT( !a.is_lottery(), "Cannot manually issue a lottery asset." );
to_account = &o.issue_to_account(d);
FC_ASSERT( is_authorized_asset( d, *to_account, a ) );
asset_dyn_data = &a.dynamic_asset_data_id(d);
FC_ASSERT( (asset_dyn_data->current_supply + o.asset_to_issue.amount) <= a.options.max_supply );
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_issue_evaluator::do_apply( const asset_issue_operation& o )
{ try {
db().adjust_balance( o.issue_to_account, o.asset_to_issue );
db().modify( *asset_dyn_data, [&o]( asset_dynamic_data_object& data ){
data.current_supply += o.asset_to_issue.amount;
});
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_reserve_evaluator::do_evaluate( const asset_reserve_operation& o )
{ try {
const database& d = db();
const asset_object& a = o.amount_to_reserve.asset_id(d);
GRAPHENE_ASSERT(
!a.is_market_issued(),
asset_reserve_invalid_on_mia,
"Cannot reserve ${sym} because it is a market-issued asset",
("sym", a.symbol)
);
from_account = &o.payer(d);
FC_ASSERT( is_authorized_asset( d, *from_account, a ) );
asset_dyn_data = &a.dynamic_asset_data_id(d);
FC_ASSERT( (asset_dyn_data->current_supply - o.amount_to_reserve.amount) >= 0 );
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_reserve_evaluator::do_apply( const asset_reserve_operation& o )
{ try {
db().adjust_balance( o.payer, -o.amount_to_reserve );
db().modify( *asset_dyn_data, [&o]( asset_dynamic_data_object& data ){
data.current_supply -= o.amount_to_reserve.amount;
});
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_fund_fee_pool_evaluator::do_evaluate(const asset_fund_fee_pool_operation& o)
{ try {
database& d = db();
const asset_object& a = o.asset_id(d);
asset_dyn_data = &a.dynamic_asset_data_id(d);
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_fund_fee_pool_evaluator::do_apply(const asset_fund_fee_pool_operation& o)
{ try {
db().adjust_balance(o.from_account, -o.amount);
db().modify( *asset_dyn_data, [&o]( asset_dynamic_data_object& data ) {
data.fee_pool += o.amount;
});
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_update_evaluator::do_evaluate(const asset_update_operation& o)
{ try {
database& d = db();
const asset_object& a = o.asset_to_update(d);
auto a_copy = a;
a_copy.options = o.new_options;
a_copy.validate();
if( o.new_issuer )
{
FC_ASSERT(d.find_object(*o.new_issuer));
if( a.is_market_issued() && *o.new_issuer == GRAPHENE_COMMITTEE_ACCOUNT )
{
const asset_object& backing = a.bitasset_data(d).options.short_backing_asset(d);
if( backing.is_market_issued() )
{
const asset_object& backing_backing = backing.bitasset_data(d).options.short_backing_asset(d);
FC_ASSERT( backing_backing.get_id() == asset_id_type(),
"May not create a blockchain-controlled market asset which is not backed by CORE.");
} else
FC_ASSERT( backing.get_id() == asset_id_type(),
"May not create a blockchain-controlled market asset which is not backed by CORE.");
}
}
if( (d.head_block_time() < HARDFORK_572_TIME) || (a.dynamic_asset_data_id(d).current_supply != 0) )
{
// new issuer_permissions must be subset of old issuer permissions
FC_ASSERT(!(o.new_options.issuer_permissions & ~a.options.issuer_permissions),
"Cannot reinstate previously revoked issuer permissions on an asset.");
}
// changed flags must be subset of old issuer permissions
FC_ASSERT(!((o.new_options.flags ^ a.options.flags) & ~a.options.issuer_permissions),
"Flag change is forbidden by issuer permissions");
asset_to_update = &a;
FC_ASSERT( o.issuer == a.issuer, "", ("o.issuer", o.issuer)("a.issuer", a.issuer) );
const auto& chain_parameters = d.get_global_properties().parameters;
FC_ASSERT( o.new_options.whitelist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
for( auto id : o.new_options.whitelist_authorities )
d.get_object(id);
FC_ASSERT( o.new_options.blacklist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
for( auto id : o.new_options.blacklist_authorities )
d.get_object(id);
return void_result();
} FC_CAPTURE_AND_RETHROW((o)) }
void_result asset_update_evaluator::do_apply(const asset_update_operation& o)
{ try {
database& d = db();
// If we are now disabling force settlements, cancel all open force settlement orders
if( o.new_options.flags & disable_force_settle && asset_to_update->can_force_settle() )
{
const auto& idx = d.get_index_type<force_settlement_index>().indices().get<by_expiration>();
// Funky iteration code because we're removing objects as we go. We have to re-initialize itr every loop instead
// of simply incrementing it.
for( auto itr = idx.lower_bound(o.asset_to_update);
itr != idx.end() && itr->settlement_asset_id() == o.asset_to_update;
itr = idx.lower_bound(o.asset_to_update) )
d.cancel_order(*itr);
}
// For market-issued assets, if core change rate changed, update flag in bitasset data
if( asset_to_update->is_market_issued()
&& asset_to_update->options.core_exchange_rate != o.new_options.core_exchange_rate )
{
const auto& bitasset = asset_to_update->bitasset_data(d);
if( !bitasset.asset_cer_updated )
{
d.modify( bitasset, [](asset_bitasset_data_object& b)
{
b.asset_cer_updated = true;
});
}
}
d.modify(*asset_to_update, [&o](asset_object& a) {
if( o.new_issuer )
a.issuer = *o.new_issuer;
a.options = o.new_options;
});
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_update_bitasset_evaluator::do_evaluate(const asset_update_bitasset_operation& o)
{ try {
database& d = db();
const asset_object& a = o.asset_to_update(d);
FC_ASSERT(a.is_market_issued(), "Cannot update BitAsset-specific settings on a non-BitAsset.");
const asset_bitasset_data_object& b = a.bitasset_data(d);
FC_ASSERT( !b.has_settlement(), "Cannot update a bitasset after a settlement has executed" );
if( o.new_options.short_backing_asset != b.options.short_backing_asset )
{
FC_ASSERT(a.dynamic_asset_data_id(d).current_supply == 0);
FC_ASSERT(d.find_object(o.new_options.short_backing_asset));
if( a.issuer == GRAPHENE_COMMITTEE_ACCOUNT )
{
const asset_object& backing = a.bitasset_data(d).options.short_backing_asset(d);
if( backing.is_market_issued() )
{
const asset_object& backing_backing = backing.bitasset_data(d).options.short_backing_asset(d);
FC_ASSERT( backing_backing.get_id() == asset_id_type(),
"May not create a blockchain-controlled market asset which is not backed by CORE.");
} else
FC_ASSERT( backing.get_id() == asset_id_type(),
"May not create a blockchain-controlled market asset which is not backed by CORE.");
}
}
bitasset_to_update = &b;
FC_ASSERT( o.issuer == a.issuer, "", ("o.issuer", o.issuer)("a.issuer", a.issuer) );
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_update_bitasset_evaluator::do_apply(const asset_update_bitasset_operation& o)
{ try {
bool should_update_feeds = false;
// If the minimum number of feeds to calculate a median has changed, we need to recalculate the median
if( o.new_options.minimum_feeds != bitasset_to_update->options.minimum_feeds )
should_update_feeds = true;
db().modify(*bitasset_to_update, [&](asset_bitasset_data_object& b) {
b.options = o.new_options;
if( should_update_feeds )
b.update_median_feeds(db().head_block_time());
});
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_update_dividend_evaluator::do_evaluate(const asset_update_dividend_operation& o)
{ try {
database& d = db();
const asset_object& a = o.asset_to_update(d);
asset_to_update = &a;
FC_ASSERT( o.issuer == a.issuer, "", ("o.issuer", o.issuer)("a.issuer", a.issuer) );
auto& params = db().get_global_properties().parameters;
if (o.new_options.payout_interval &&
*o.new_options.payout_interval < params.maintenance_interval)
FC_THROW("New payout interval may not be less than the maintenance interval",
("new_payout_interval", o.new_options.payout_interval)("maintenance_interval", params.maintenance_interval));
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_update_dividend_evaluator::do_apply( const asset_update_dividend_operation& op )
{ try {
database& d = db();
if (!asset_to_update->dividend_data_id)
{
// this was not a dividend-paying asset, we're converting it to a dividend-paying asset
std::string dividend_distribution_account_name(boost::to_lower_copy(asset_to_update->symbol) + "-dividend-distribution");
const auto& new_acnt_object = db().create<account_object>( [&]( account_object& obj ){
obj.registrar = op.issuer;
obj.referrer = op.issuer;
obj.lifetime_referrer = op.issuer(db()).lifetime_referrer;
obj.network_fee_percentage = GRAPHENE_DEFAULT_NETWORK_PERCENT_OF_FEE;
obj.lifetime_referrer_fee_percentage = GRAPHENE_DEFAULT_LIFETIME_REFERRER_PERCENT_OF_FEE;
obj.referrer_rewards_percentage = GRAPHENE_DEFAULT_LIFETIME_REFERRER_PERCENT_OF_FEE;
obj.name = dividend_distribution_account_name;
obj.owner.weight_threshold = 1;
obj.active.weight_threshold = 1;
obj.statistics = db().create<account_statistics_object>([&](account_statistics_object& s){s.owner = obj.id;}).id;
});
const asset_dividend_data_object& dividend_data = d.create<asset_dividend_data_object>( [&]( asset_dividend_data_object& dividend_data_obj ) {
dividend_data_obj.options = op.new_options;
dividend_data_obj.dividend_distribution_account = new_acnt_object.id;
});
d.modify(*asset_to_update, [&](asset_object& a) {
a.dividend_data_id = dividend_data.id;
});
}
else
{
const asset_dividend_data_object& dividend_data = asset_to_update->dividend_data(d);
d.modify(dividend_data, [&]( asset_dividend_data_object& dividend_data_obj ) {
dividend_data_obj.options = op.new_options;
// whenever new options are set, clear out the scheduled payout/distribution times
// this will reset and cause the next distribution to happen at the next maintenance
// interval and a payout at the next_payout_time
dividend_data_obj.last_scheduled_payout_time.reset();
dividend_data_obj.last_scheduled_distribution_time.reset();
});
}
return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
void_result asset_update_feed_producers_evaluator::do_evaluate(const asset_update_feed_producers_evaluator::operation_type& o)
{ try {
database& d = db();
FC_ASSERT( o.new_feed_producers.size() <= d.get_global_properties().parameters.maximum_asset_feed_publishers );
for( auto id : o.new_feed_producers )
d.get_object(id);
const asset_object& a = o.asset_to_update(d);
FC_ASSERT(a.is_market_issued(), "Cannot update feed producers on a non-BitAsset.");
FC_ASSERT(!(a.options.flags & committee_fed_asset), "Cannot set feed producers on a committee-fed asset.");
FC_ASSERT(!(a.options.flags & witness_fed_asset), "Cannot set feed producers on a witness-fed asset.");
const asset_bitasset_data_object& b = a.bitasset_data(d);
bitasset_to_update = &b;
FC_ASSERT( a.issuer == o.issuer );
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_update_feed_producers_evaluator::do_apply(const asset_update_feed_producers_evaluator::operation_type& o)
{ try {
db().modify(*bitasset_to_update, [&](asset_bitasset_data_object& a) {
//This is tricky because I have a set of publishers coming in, but a map of publisher to feed is stored.
//I need to update the map such that the keys match the new publishers, but not munge the old price feeds from
//publishers who are being kept.
//First, remove any old publishers who are no longer publishers
for( auto itr = a.feeds.begin(); itr != a.feeds.end(); )
{
if( !o.new_feed_producers.count(itr->first) )
itr = a.feeds.erase(itr);
else
++itr;
}
//Now, add any new publishers
for( auto itr = o.new_feed_producers.begin(); itr != o.new_feed_producers.end(); ++itr )
if( !a.feeds.count(*itr) )
a.feeds[*itr];
a.update_median_feeds(db().head_block_time());
});
db().check_call_orders( o.asset_to_update(db()) );
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_global_settle_evaluator::do_evaluate(const asset_global_settle_evaluator::operation_type& op)
{ try {
const database& d = db();
asset_to_settle = &op.asset_to_settle(d);
FC_ASSERT(asset_to_settle->is_market_issued());
FC_ASSERT(asset_to_settle->can_global_settle());
FC_ASSERT(asset_to_settle->issuer == op.issuer );
FC_ASSERT(asset_to_settle->dynamic_data(d).current_supply > 0);
const auto& idx = d.get_index_type<call_order_index>().indices().get<by_collateral>();
assert( !idx.empty() );
auto itr = idx.lower_bound(boost::make_tuple(price::min(asset_to_settle->bitasset_data(d).options.short_backing_asset,
op.asset_to_settle)));
assert( itr != idx.end() && itr->debt_type() == op.asset_to_settle );
const call_order_object& least_collateralized_short = *itr;
FC_ASSERT(least_collateralized_short.get_debt() * op.settle_price <= least_collateralized_short.get_collateral(),
"Cannot force settle at supplied price: least collateralized short lacks sufficient collateral to settle.");
return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
void_result asset_global_settle_evaluator::do_apply(const asset_global_settle_evaluator::operation_type& op)
{ try {
database& d = db();
d.globally_settle_asset( op.asset_to_settle(db()), op.settle_price );
return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
void_result asset_settle_evaluator::do_evaluate(const asset_settle_evaluator::operation_type& op)
{ try {
const database& d = db();
asset_to_settle = &op.amount.asset_id(d);
FC_ASSERT(asset_to_settle->is_market_issued());
const auto& bitasset = asset_to_settle->bitasset_data(d);
FC_ASSERT(asset_to_settle->can_force_settle() || bitasset.has_settlement() );
if( bitasset.is_prediction_market )
FC_ASSERT( bitasset.has_settlement(), "global settlement must occur before force settling a prediction market" );
else if( bitasset.current_feed.settlement_price.is_null() )
FC_THROW_EXCEPTION(insufficient_feeds, "Cannot force settle with no price feed.");
FC_ASSERT(d.get_balance(d.get(op.account), *asset_to_settle) >= op.amount);
return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
operation_result asset_settle_evaluator::do_apply(const asset_settle_evaluator::operation_type& op)
{ try {
database& d = db();
d.adjust_balance(op.account, -op.amount);
const auto& bitasset = asset_to_settle->bitasset_data(d);
if( bitasset.has_settlement() )
{
auto settled_amount = op.amount * bitasset.settlement_price;
FC_ASSERT( settled_amount.amount <= bitasset.settlement_fund );
d.modify( bitasset, [&]( asset_bitasset_data_object& obj ){
obj.settlement_fund -= settled_amount.amount;
});
d.adjust_balance(op.account, settled_amount);
const auto& mia_dyn = asset_to_settle->dynamic_asset_data_id(d);
d.modify( mia_dyn, [&]( asset_dynamic_data_object& obj ){
obj.current_supply -= op.amount.amount;
});
return settled_amount;
}
else
{
return d.create<force_settlement_object>([&](force_settlement_object& s) {
s.owner = op.account;
s.balance = op.amount;
s.settlement_date = d.head_block_time() + asset_to_settle->bitasset_data(d).options.force_settlement_delay_sec;
}).id;
}
} FC_CAPTURE_AND_RETHROW( (op) ) }
void_result asset_publish_feeds_evaluator::do_evaluate(const asset_publish_feed_operation& o)
{ try {
database& d = db();
const asset_object& base = o.asset_id(d);
//Verify that this feed is for a market-issued asset and that asset is backed by the base
FC_ASSERT(base.is_market_issued());
const asset_bitasset_data_object& bitasset = base.bitasset_data(d);
FC_ASSERT( !bitasset.has_settlement(), "No further feeds may be published after a settlement event" );
FC_ASSERT( o.feed.settlement_price.quote.asset_id == bitasset.options.short_backing_asset );
if( d.head_block_time() > HARDFORK_480_TIME )
{
if( !o.feed.core_exchange_rate.is_null() )
{
FC_ASSERT( o.feed.core_exchange_rate.quote.asset_id == asset_id_type() );
}
}
else
{
if( (!o.feed.settlement_price.is_null()) && (!o.feed.core_exchange_rate.is_null()) )
{
FC_ASSERT( o.feed.settlement_price.quote.asset_id == o.feed.core_exchange_rate.quote.asset_id );
}
}
//Verify that the publisher is authoritative to publish a feed
if( base.options.flags & witness_fed_asset )
{
FC_ASSERT( d.get(GRAPHENE_WITNESS_ACCOUNT).active.account_auths.count(o.publisher) );
}
else if( base.options.flags & committee_fed_asset )
{
FC_ASSERT( d.get(GRAPHENE_COMMITTEE_ACCOUNT).active.account_auths.count(o.publisher) );
}
else
{
FC_ASSERT(bitasset.feeds.count(o.publisher));
}
return void_result();
} FC_CAPTURE_AND_RETHROW((o)) }
void_result asset_publish_feeds_evaluator::do_apply(const asset_publish_feed_operation& o)
{ try {
database& d = db();
const asset_object& base = o.asset_id(d);
const asset_bitasset_data_object& bad = base.bitasset_data(d);
auto old_feed = bad.current_feed;
// Store medians for this asset
d.modify(bad , [&o,&d](asset_bitasset_data_object& a) {
a.feeds[o.publisher] = make_pair(d.head_block_time(), o.feed);
a.update_median_feeds(d.head_block_time());
});
if( !(old_feed == bad.current_feed) )
db().check_call_orders(base);
return void_result();
} FC_CAPTURE_AND_RETHROW((o)) }
void_result asset_claim_fees_evaluator::do_evaluate( const asset_claim_fees_operation& o )
{ try {
FC_ASSERT( db().head_block_time() > HARDFORK_413_TIME );
FC_ASSERT( o.amount_to_claim.asset_id(db()).issuer == o.issuer, "Asset fees may only be claimed by the issuer" );
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
void_result asset_claim_fees_evaluator::do_apply( const asset_claim_fees_operation& o )
{ try {
database& d = db();
const asset_object& a = o.amount_to_claim.asset_id(d);
const asset_dynamic_data_object& addo = a.dynamic_asset_data_id(d);
FC_ASSERT( o.amount_to_claim.amount <= addo.accumulated_fees, "Attempt to claim more fees than have accumulated", ("addo",addo) );
d.modify( addo, [&]( asset_dynamic_data_object& _addo ) {
_addo.accumulated_fees -= o.amount_to_claim.amount;
});
d.adjust_balance( o.issuer, o.amount_to_claim );
return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }
} } // graphene::chain
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