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steem_evaluator.cpp
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steem_evaluator.cpp
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#include <steem/chain/steem_fwd.hpp>
#include <steem/chain/steem_evaluator.hpp>
#include <steem/chain/database.hpp>
#include <steem/chain/custom_operation_interpreter.hpp>
#include <steem/chain/steem_objects.hpp>
#include <steem/chain/witness_objects.hpp>
#include <steem/chain/block_summary_object.hpp>
#include <steem/chain/util/reward.hpp>
#include <steem/chain/util/manabar.hpp>
#include <fc/macros.hpp>
#ifndef IS_LOW_MEM
FC_TODO( "After we vendor fc, also vendor diff_match_patch and fix these warnings" )
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wsign-compare"
#pragma GCC diagnostic push
#if !defined( __clang__ )
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
#include <diff_match_patch.h>
#pragma GCC diagnostic pop
#pragma GCC diagnostic pop
#include <boost/locale/encoding_utf.hpp>
using boost::locale::conv::utf_to_utf;
std::wstring utf8_to_wstring(const std::string& str)
{
return utf_to_utf<wchar_t>(str.c_str(), str.c_str() + str.size());
}
std::string wstring_to_utf8(const std::wstring& str)
{
return utf_to_utf<char>(str.c_str(), str.c_str() + str.size());
}
#endif
#include <fc/uint128.hpp>
#include <fc/utf8.hpp>
#include <limits>
namespace steem { namespace chain {
using fc::uint128_t;
inline void validate_permlink_0_1( const string& permlink )
{
FC_ASSERT( permlink.size() > STEEM_MIN_PERMLINK_LENGTH && permlink.size() < STEEM_MAX_PERMLINK_LENGTH, "Permlink is not a valid size." );
for( const auto& c : permlink )
{
switch( c )
{
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': case 'g': case 'h': case 'i':
case 'j': case 'k': case 'l': case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x': case 'y': case 'z': case '0':
case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
case '-':
break;
default:
FC_ASSERT( false, "Invalid permlink character: ${s}", ("s", std::string() + c ) );
}
}
}
template< bool force_canon >
void copy_legacy_chain_properties( chain_properties& dest, const legacy_chain_properties& src )
{
dest.account_creation_fee = src.account_creation_fee.to_asset< force_canon >();
dest.maximum_block_size = src.maximum_block_size;
dest.sbd_interest_rate = src.sbd_interest_rate;
}
void witness_update_evaluator::do_apply( const witness_update_operation& o )
{
_db.get_account( o.owner ); // verify owner exists
if ( _db.has_hardfork( STEEM_HARDFORK_0_14__410 ) )
{
FC_ASSERT( o.props.account_creation_fee.symbol.is_canon() );
if( _db.has_hardfork( STEEM_HARDFORK_0_20__2651 ) || _db.is_producing() )
{
FC_TODO( "Move to validate() after HF20" );
FC_ASSERT( o.props.account_creation_fee.amount <= STEEM_MAX_ACCOUNT_CREATION_FEE, "account_creation_fee greater than maximum account creation fee" );
}
}
else if( !o.props.account_creation_fee.symbol.is_canon() )
{
// after HF, above check can be moved to validate() if reindex doesn't show this warning
wlog( "Wrong fee symbol in block ${b}", ("b", _db.head_block_num()+1) );
}
FC_TODO( "Check and move this to validate after HF 20" );
if( _db.is_producing() || _db.has_hardfork( STEEM_HARDFORK_0_20__2642 ))
{
FC_ASSERT( o.props.maximum_block_size <= STEEM_SOFT_MAX_BLOCK_SIZE, "Max block size cannot be more than 2MiB" );
}
const auto& by_witness_name_idx = _db.get_index< witness_index >().indices().get< by_name >();
auto wit_itr = by_witness_name_idx.find( o.owner );
if( wit_itr != by_witness_name_idx.end() )
{
_db.modify( *wit_itr, [&]( witness_object& w ) {
from_string( w.url, o.url );
w.signing_key = o.block_signing_key;
copy_legacy_chain_properties< false >( w.props, o.props );
});
}
else
{
_db.create< witness_object >( [&]( witness_object& w ) {
w.owner = o.owner;
from_string( w.url, o.url );
w.signing_key = o.block_signing_key;
w.created = _db.head_block_time();
copy_legacy_chain_properties< false >( w.props, o.props );
});
}
}
struct witness_properties_change_flags
{
uint32_t account_creation_changed : 1;
uint32_t max_block_changed : 1;
uint32_t sbd_interest_changed : 1;
uint32_t account_subsidy_budget_changed : 1;
uint32_t account_subsidy_decay_changed : 1;
uint32_t key_changed : 1;
uint32_t sbd_exchange_changed : 1;
uint32_t url_changed : 1;
};
void witness_set_properties_evaluator::do_apply( const witness_set_properties_operation& o )
{
FC_ASSERT( _db.has_hardfork( STEEM_HARDFORK_0_20__1620 ), "witness_set_properties_evaluator not enabled until HF 20" );
const auto& witness = _db.get< witness_object, by_name >( o.owner ); // verifies witness exists;
// Capture old properties. This allows only updating the object once.
chain_properties props;
public_key_type signing_key;
price sbd_exchange_rate;
time_point_sec last_sbd_exchange_update;
string url;
witness_properties_change_flags flags;
auto itr = o.props.find( "key" );
// This existence of 'key' is checked in witness_set_properties_operation::validate
fc::raw::unpack_from_vector( itr->second, signing_key );
FC_ASSERT( signing_key == witness.signing_key, "'key' does not match witness signing key.",
("key", signing_key)("signing_key", witness.signing_key) );
itr = o.props.find( "account_creation_fee" );
flags.account_creation_changed = itr != o.props.end();
if( flags.account_creation_changed )
{
fc::raw::unpack_from_vector( itr->second, props.account_creation_fee );
if( _db.has_hardfork( STEEM_HARDFORK_0_20__2651 ) || _db.is_producing() )
{
FC_TODO( "Move to validate() after HF20" );
FC_ASSERT( props.account_creation_fee.amount <= STEEM_MAX_ACCOUNT_CREATION_FEE, "account_creation_fee greater than maximum account creation fee" );
}
}
itr = o.props.find( "maximum_block_size" );
flags.max_block_changed = itr != o.props.end();
if( flags.max_block_changed )
{
fc::raw::unpack_from_vector( itr->second, props.maximum_block_size );
}
itr = o.props.find( "sbd_interest_rate" );
flags.sbd_interest_changed = itr != o.props.end();
if( flags.sbd_interest_changed )
{
fc::raw::unpack_from_vector( itr->second, props.sbd_interest_rate );
}
itr = o.props.find( "account_subsidy_budget" );
flags.account_subsidy_budget_changed = itr != o.props.end();
if( flags.account_subsidy_budget_changed )
{
fc::raw::unpack_from_vector( itr->second, props.account_subsidy_budget );
}
itr = o.props.find( "account_subsidy_decay" );
flags.account_subsidy_decay_changed = itr != o.props.end();
if( flags.account_subsidy_decay_changed )
{
fc::raw::unpack_from_vector( itr->second, props.account_subsidy_decay );
}
itr = o.props.find( "new_signing_key" );
flags.key_changed = itr != o.props.end();
if( flags.key_changed )
{
fc::raw::unpack_from_vector( itr->second, signing_key );
}
itr = o.props.find( "sbd_exchange_rate" );
flags.sbd_exchange_changed = itr != o.props.end();
if( flags.sbd_exchange_changed )
{
fc::raw::unpack_from_vector( itr->second, sbd_exchange_rate );
last_sbd_exchange_update = _db.head_block_time();
}
itr = o.props.find( "url" );
flags.url_changed = itr != o.props.end();
if( flags.url_changed )
{
fc::raw::unpack_from_vector< std::string >( itr->second, url );
}
_db.modify( witness, [&]( witness_object& w )
{
if( flags.account_creation_changed )
{
w.props.account_creation_fee = props.account_creation_fee;
}
if( flags.max_block_changed )
{
w.props.maximum_block_size = props.maximum_block_size;
}
if( flags.sbd_interest_changed )
{
w.props.sbd_interest_rate = props.sbd_interest_rate;
}
if( flags.account_subsidy_budget_changed )
{
w.props.account_subsidy_budget = props.account_subsidy_budget;
}
if( flags.account_subsidy_decay_changed )
{
w.props.account_subsidy_decay = props.account_subsidy_decay;
}
if( flags.key_changed )
{
w.signing_key = signing_key;
}
if( flags.sbd_exchange_changed )
{
w.sbd_exchange_rate = sbd_exchange_rate;
w.last_sbd_exchange_update = last_sbd_exchange_update;
}
if( flags.url_changed )
{
from_string( w.url, url );
}
});
}
void verify_authority_accounts_exist(
const database& db,
const authority& auth,
const account_name_type& auth_account,
authority::classification auth_class)
{
for( const std::pair< account_name_type, weight_type >& aw : auth.account_auths )
{
const account_object* a = db.find_account( aw.first );
FC_ASSERT( a != nullptr, "New ${ac} authority on account ${aa} references non-existing account ${aref}",
("aref", aw.first)("ac", auth_class)("aa", auth_account) );
}
}
void initialize_account_object( account_object& acc, const account_name_type& name, const public_key_type& key,
const dynamic_global_property_object& props, bool mined, const account_name_type& recovery_account, uint32_t hardfork )
{
acc.name = name;
acc.memo_key = key;
acc.created = props.time;
acc.voting_manabar.last_update_time = props.time.sec_since_epoch();
acc.downvote_manabar.last_update_time = props.time.sec_since_epoch();
acc.mined = mined;
if( hardfork < STEEM_HARDFORK_0_20__2539 )
{
acc.voting_manabar.current_mana = STEEM_100_PERCENT;
}
if( hardfork >= STEEM_HARDFORK_0_11 )
{
FC_TODO( "If after HF 20, there are no temp account creations, the HF check can be removed." )
if( ( hardfork < STEEM_HARDFORK_0_20__1782 ) || ( recovery_account != STEEM_TEMP_ACCOUNT ) )
{
acc.recovery_account = recovery_account;
}
}
else
{
acc.recovery_account = "steem";
}
}
void account_create_evaluator::do_apply( const account_create_operation& o )
{
const auto& creator = _db.get_account( o.creator );
const auto& props = _db.get_dynamic_global_properties();
const witness_schedule_object& wso = _db.get_witness_schedule_object();
if( _db.has_hardfork( STEEM_HARDFORK_0_20__2651 ) || _db.is_producing() )
{
FC_TODO( "Move to validate() after HF20" );
FC_ASSERT( o.fee <= asset( STEEM_MAX_ACCOUNT_CREATION_FEE, STEEM_SYMBOL ), "Account creation fee cannot be too large" );
}
if( _db.has_hardfork( STEEM_HARDFORK_0_20__1771 ) )
{
FC_ASSERT( o.fee == wso.median_props.account_creation_fee, "Must pay the exact account creation fee. paid: ${p} fee: ${f}",
("p", o.fee)
("f", wso.median_props.account_creation_fee) );
}
else if( !_db.has_hardfork( STEEM_HARDFORK_0_20__1761 ) && _db.has_hardfork( STEEM_HARDFORK_0_19__987 ) )
{
FC_ASSERT( o.fee >= asset( wso.median_props.account_creation_fee.amount * STEEM_CREATE_ACCOUNT_WITH_STEEM_MODIFIER, STEEM_SYMBOL ), "Insufficient Fee: ${f} required, ${p} provided.",
("f", wso.median_props.account_creation_fee * asset( STEEM_CREATE_ACCOUNT_WITH_STEEM_MODIFIER, STEEM_SYMBOL ) )
("p", o.fee) );
}
else if( _db.has_hardfork( STEEM_HARDFORK_0_1 ) )
{
FC_ASSERT( o.fee >= wso.median_props.account_creation_fee, "Insufficient Fee: ${f} required, ${p} provided.",
("f", wso.median_props.account_creation_fee)
("p", o.fee) );
}
FC_TODO( "Check and move to validate post HF20" );
if( _db.is_producing() || _db.has_hardfork( STEEM_HARDFORK_0_20 ) )
{
validate_auth_size( o.owner );
validate_auth_size( o.active );
validate_auth_size( o.posting );
}
if( _db.has_hardfork( STEEM_HARDFORK_0_15__465 ) )
{
verify_authority_accounts_exist( _db, o.owner, o.new_account_name, authority::owner );
verify_authority_accounts_exist( _db, o.active, o.new_account_name, authority::active );
verify_authority_accounts_exist( _db, o.posting, o.new_account_name, authority::posting );
}
_db.adjust_balance( creator, -o.fee );
if( _db.has_hardfork( STEEM_HARDFORK_0_20__1762 ) )
{
_db.adjust_balance( _db.get< account_object, by_name >( STEEM_NULL_ACCOUNT ), o.fee );
}
const auto& new_account = _db.create< account_object >( [&]( account_object& acc )
{
initialize_account_object( acc, o.new_account_name, o.memo_key, props, false /*mined*/, o.creator, _db.get_hardfork() );
});
#ifndef IS_LOW_MEM
_db.create< account_metadata_object >( [&]( account_metadata_object& meta )
{
meta.account = new_account.id;
from_string( meta.json_metadata, o.json_metadata );
});
#else
FC_UNUSED( new_account );
#endif
_db.create< account_authority_object >( [&]( account_authority_object& auth )
{
auth.account = o.new_account_name;
auth.owner = o.owner;
auth.active = o.active;
auth.posting = o.posting;
auth.last_owner_update = fc::time_point_sec::min();
});
if( !_db.has_hardfork( STEEM_HARDFORK_0_20__1762 ) && o.fee.amount > 0 )
{
_db.create_vesting( new_account, o.fee );
}
}
void account_create_with_delegation_evaluator::do_apply( const account_create_with_delegation_operation& o )
{
FC_ASSERT( !_db.has_hardfork( STEEM_HARDFORK_0_20__1760 ), "Account creation with delegation is deprecated as of Hardfork 20" );
if( _db.has_hardfork( STEEM_HARDFORK_0_20__2651 ) || _db.is_producing() )
{
FC_TODO( "Move to validate() after HF20" );
FC_ASSERT( o.fee <= asset( STEEM_MAX_ACCOUNT_CREATION_FEE, STEEM_SYMBOL ), "Account creation fee cannot be too large" );
}
const auto& creator = _db.get_account( o.creator );
const auto& props = _db.get_dynamic_global_properties();
const witness_schedule_object& wso = _db.get_witness_schedule_object();
FC_ASSERT( creator.balance >= o.fee, "Insufficient balance to create account.",
( "creator.balance", creator.balance )
( "required", o.fee ) );
FC_ASSERT( creator.vesting_shares - creator.delegated_vesting_shares - asset( creator.to_withdraw - creator.withdrawn, VESTS_SYMBOL ) >= o.delegation, "Insufficient vesting shares to delegate to new account.",
( "creator.vesting_shares", creator.vesting_shares )
( "creator.delegated_vesting_shares", creator.delegated_vesting_shares )( "required", o.delegation ) );
auto target_delegation = asset( wso.median_props.account_creation_fee.amount * STEEM_CREATE_ACCOUNT_WITH_STEEM_MODIFIER * STEEM_CREATE_ACCOUNT_DELEGATION_RATIO, STEEM_SYMBOL ) * props.get_vesting_share_price();
auto current_delegation = asset( o.fee.amount * STEEM_CREATE_ACCOUNT_DELEGATION_RATIO, STEEM_SYMBOL ) * props.get_vesting_share_price() + o.delegation;
FC_ASSERT( current_delegation >= target_delegation, "Insufficient Delegation ${f} required, ${p} provided.",
("f", target_delegation )
( "p", current_delegation )
( "account_creation_fee", wso.median_props.account_creation_fee )
( "o.fee", o.fee )
( "o.delegation", o.delegation ) );
FC_ASSERT( o.fee >= wso.median_props.account_creation_fee, "Insufficient Fee: ${f} required, ${p} provided.",
("f", wso.median_props.account_creation_fee)
("p", o.fee) );
FC_TODO( "Check and move to validate post HF20" );
if( _db.is_producing() || _db.has_hardfork( STEEM_HARDFORK_0_20 ) )
{
validate_auth_size( o.owner );
validate_auth_size( o.active );
validate_auth_size( o.posting );
}
for( const auto& a : o.owner.account_auths )
{
_db.get_account( a.first );
}
for( const auto& a : o.active.account_auths )
{
_db.get_account( a.first );
}
for( const auto& a : o.posting.account_auths )
{
_db.get_account( a.first );
}
_db.modify( creator, [&]( account_object& c )
{
c.balance -= o.fee;
c.delegated_vesting_shares += o.delegation;
});
if( _db.has_hardfork( STEEM_HARDFORK_0_20__1762 ) )
{
_db.adjust_balance( _db.get< account_object, by_name >( STEEM_NULL_ACCOUNT ), o.fee );
}
const auto& new_account = _db.create< account_object >( [&]( account_object& acc )
{
initialize_account_object( acc, o.new_account_name, o.memo_key, props, false /*mined*/, o.creator, _db.get_hardfork() );
acc.received_vesting_shares = o.delegation;
});
#ifndef IS_LOW_MEM
_db.create< account_metadata_object >( [&]( account_metadata_object& meta )
{
meta.account = new_account.id;
from_string( meta.json_metadata, o.json_metadata );
});
#else
FC_UNUSED( new_account );
#endif
_db.create< account_authority_object >( [&]( account_authority_object& auth )
{
auth.account = o.new_account_name;
auth.owner = o.owner;
auth.active = o.active;
auth.posting = o.posting;
auth.last_owner_update = fc::time_point_sec::min();
});
if( o.delegation.amount > 0 || !_db.has_hardfork( STEEM_HARDFORK_0_19__997 ) )
{
_db.create< vesting_delegation_object >( [&]( vesting_delegation_object& vdo )
{
vdo.delegator = o.creator;
vdo.delegatee = o.new_account_name;
vdo.vesting_shares = o.delegation;
vdo.min_delegation_time = _db.head_block_time() + STEEM_CREATE_ACCOUNT_DELEGATION_TIME;
});
}
if( !_db.has_hardfork( STEEM_HARDFORK_0_20__1762 ) && o.fee.amount > 0 )
{
_db.create_vesting( new_account, o.fee );
}
}
void account_update_evaluator::do_apply( const account_update_operation& o )
{
if( _db.has_hardfork( STEEM_HARDFORK_0_1 ) ) FC_ASSERT( o.account != STEEM_TEMP_ACCOUNT, "Cannot update temp account." );
if( ( _db.has_hardfork( STEEM_HARDFORK_0_15__465 ) ) && o.posting )
o.posting->validate();
const auto& account = _db.get_account( o.account );
const auto& account_auth = _db.get< account_authority_object, by_account >( o.account );
if( _db.is_producing() || _db.has_hardfork( STEEM_HARDFORK_0_20 ) )
{
if( o.owner )
validate_auth_size( *o.owner );
if( o.active )
validate_auth_size( *o.active );
if( o.posting )
validate_auth_size( *o.posting );
}
if( o.owner )
{
#ifndef IS_TEST_NET
if( _db.has_hardfork( STEEM_HARDFORK_0_11 ) )
FC_ASSERT( _db.head_block_time() - account_auth.last_owner_update > STEEM_OWNER_UPDATE_LIMIT, "Owner authority can only be updated once an hour." );
#endif
if( ( _db.has_hardfork( STEEM_HARDFORK_0_15__465 ) ) )
verify_authority_accounts_exist( _db, *o.owner, o.account, authority::owner );
_db.update_owner_authority( account, *o.owner );
}
if( o.active && ( _db.has_hardfork( STEEM_HARDFORK_0_15__465 ) ) )
verify_authority_accounts_exist( _db, *o.active, o.account, authority::active );
if( o.posting && ( _db.has_hardfork( STEEM_HARDFORK_0_15__465 ) ) )
verify_authority_accounts_exist( _db, *o.posting, o.account, authority::posting );
_db.modify( account, [&]( account_object& acc )
{
if( o.memo_key != public_key_type() )
acc.memo_key = o.memo_key;
acc.last_account_update = _db.head_block_time();
});
#ifndef IS_LOW_MEM
if( o.json_metadata.size() > 0 )
{
_db.modify( _db.get< account_metadata_object, by_account >( account.id ), [&]( account_metadata_object& meta )
{
from_string( meta.json_metadata, o.json_metadata );
if ( !_db.has_hardfork( STEEM_HARDFORK_0_21__3274 ) )
{
from_string( meta.posting_json_metadata, o.json_metadata );
}
});
}
#endif
if( o.active || o.posting )
{
_db.modify( account_auth, [&]( account_authority_object& auth)
{
if( o.active ) auth.active = *o.active;
if( o.posting ) auth.posting = *o.posting;
});
}
}
void account_update2_evaluator::do_apply( const account_update2_operation& o )
{
FC_ASSERT( _db.has_hardfork( STEEM_HARDFORK_0_21__3274 ), "Operation 'account_update2' is not enabled until HF 21" );
FC_ASSERT( o.account != STEEM_TEMP_ACCOUNT, "Cannot update temp account." );
if( o.posting )
o.posting->validate();
const auto& account = _db.get_account( o.account );
const auto& account_auth = _db.get< account_authority_object, by_account >( o.account );
if( o.owner )
validate_auth_size( *o.owner );
if( o.active )
validate_auth_size( *o.active );
if( o.posting )
validate_auth_size( *o.posting );
if( o.owner )
{
#ifndef IS_TEST_NET
FC_ASSERT( _db.head_block_time() - account_auth.last_owner_update > STEEM_OWNER_UPDATE_LIMIT, "Owner authority can only be updated once an hour." );
#endif
verify_authority_accounts_exist( _db, *o.owner, o.account, authority::owner );
_db.update_owner_authority( account, *o.owner );
}
if( o.active )
verify_authority_accounts_exist( _db, *o.active, o.account, authority::active );
if( o.posting )
verify_authority_accounts_exist( _db, *o.posting, o.account, authority::posting );
_db.modify( account, [&]( account_object& acc )
{
if( o.memo_key && *o.memo_key != public_key_type() )
acc.memo_key = *o.memo_key;
acc.last_account_update = _db.head_block_time();
});
#ifndef IS_LOW_MEM
if( o.json_metadata.size() > 0 || o.posting_json_metadata.size() > 0 )
{
_db.modify( _db.get< account_metadata_object, by_account >( account.id ), [&]( account_metadata_object& meta )
{
if ( o.json_metadata.size() > 0 )
from_string( meta.json_metadata, o.json_metadata );
if ( o.posting_json_metadata.size() > 0 )
from_string( meta.posting_json_metadata, o.posting_json_metadata );
});
}
#endif
if( o.active || o.posting )
{
_db.modify( account_auth, [&]( account_authority_object& auth)
{
if( o.active ) auth.active = *o.active;
if( o.posting ) auth.posting = *o.posting;
});
}
}
/**
* Because net_rshares is 0 there is no need to update any pending payout calculations or parent posts.
*/
void delete_comment_evaluator::do_apply( const delete_comment_operation& o )
{
const auto& comment = _db.get_comment( o.author, o.permlink );
FC_ASSERT( comment.children == 0, "Cannot delete a comment with replies." );
if( _db.has_hardfork( STEEM_HARDFORK_0_19__876 ) )
FC_ASSERT( comment.cashout_time != fc::time_point_sec::maximum() );
if( _db.has_hardfork( STEEM_HARDFORK_0_19__977 ) )
FC_ASSERT( comment.net_rshares <= 0, "Cannot delete a comment with net positive votes." );
if( comment.net_rshares > 0 ) return;
const auto& vote_idx = _db.get_index<comment_vote_index>().indices().get<by_comment_voter>();
auto vote_itr = vote_idx.lower_bound( comment_id_type(comment.id) );
while( vote_itr != vote_idx.end() && vote_itr->comment == comment.id ) {
const auto& cur_vote = *vote_itr;
++vote_itr;
_db.remove(cur_vote);
}
/// this loop can be skiped for validate-only nodes as it is merely gathering stats for indicies
if( _db.has_hardfork( STEEM_HARDFORK_0_6__80 ) && comment.parent_author != STEEM_ROOT_POST_PARENT )
{
auto parent = &_db.get_comment( comment.parent_author, comment.parent_permlink );
auto now = _db.head_block_time();
while( parent )
{
_db.modify( *parent, [&]( comment_object& p ){
p.children--;
p.active = now;
});
#ifndef IS_LOW_MEM
if( parent->parent_author != STEEM_ROOT_POST_PARENT )
parent = &_db.get_comment( parent->parent_author, parent->parent_permlink );
else
#endif
parent = nullptr;
}
}
_db.remove( comment );
}
struct comment_options_extension_visitor
{
comment_options_extension_visitor( const comment_object& c, database& db ) : _c( c ), _db( db ) {}
typedef void result_type;
const comment_object& _c;
database& _db;
#ifdef STEEM_ENABLE_SMT
void operator()( const allowed_vote_assets& va) const
{
FC_ASSERT( _c.abs_rshares == 0, "Comment must not have been voted on before specifying allowed vote assets." );
auto remaining_asset_number = SMT_MAX_VOTABLE_ASSETS;
FC_ASSERT( remaining_asset_number > 0 );
_db.modify( _c, [&]( comment_object& c )
{
for( const auto& a : va.votable_assets )
{
if( a.first != STEEM_SYMBOL )
{
FC_ASSERT( remaining_asset_number > 0, "Comment votable assets number exceeds allowed limit ${ava}.",
("ava", SMT_MAX_VOTABLE_ASSETS) );
--remaining_asset_number;
c.allowed_vote_assets.emplace_back( a.first, a.second );
}
}
});
}
#endif
void operator()( const comment_payout_beneficiaries& cpb ) const
{
FC_ASSERT( _c.beneficiaries.size() == 0, "Comment already has beneficiaries specified." );
FC_ASSERT( _c.abs_rshares == 0, "Comment must not have been voted on before specifying beneficiaries." );
_db.modify( _c, [&]( comment_object& c )
{
for( auto& b : cpb.beneficiaries )
{
auto acc = _db.find< account_object, by_name >( b.account );
FC_ASSERT( acc != nullptr, "Beneficiary \"${a}\" must exist.", ("a", b.account) );
c.beneficiaries.push_back( b );
}
});
}
};
void comment_options_evaluator::do_apply( const comment_options_operation& o )
{
const auto& comment = _db.get_comment( o.author, o.permlink );
if( !o.allow_curation_rewards || !o.allow_votes || o.max_accepted_payout < comment.max_accepted_payout )
FC_ASSERT( comment.abs_rshares == 0, "One of the included comment options requires the comment to have no rshares allocated to it." );
FC_ASSERT( comment.allow_curation_rewards >= o.allow_curation_rewards, "Curation rewards cannot be re-enabled." );
FC_ASSERT( comment.allow_votes >= o.allow_votes, "Voting cannot be re-enabled." );
FC_ASSERT( comment.max_accepted_payout >= o.max_accepted_payout, "A comment cannot accept a greater payout." );
FC_ASSERT( comment.percent_steem_dollars >= o.percent_steem_dollars, "A comment cannot accept a greater percent SBD." );
_db.modify( comment, [&]( comment_object& c ) {
c.max_accepted_payout = o.max_accepted_payout;
c.percent_steem_dollars = o.percent_steem_dollars;
c.allow_votes = o.allow_votes;
c.allow_curation_rewards = o.allow_curation_rewards;
});
for( auto& e : o.extensions )
{
e.visit( comment_options_extension_visitor( comment, _db ) );
}
}
void comment_evaluator::do_apply( const comment_operation& o )
{ try {
if( _db.has_hardfork( STEEM_HARDFORK_0_5__55 ) )
FC_ASSERT( o.title.size() + o.body.size() + o.json_metadata.size(), "Cannot update comment because nothing appears to be changing." );
const auto& by_permlink_idx = _db.get_index< comment_index >().indices().get< by_permlink >();
auto itr = by_permlink_idx.find( boost::make_tuple( o.author, o.permlink ) );
const auto& auth = _db.get_account( o.author ); /// prove it exists
comment_id_type id;
const comment_object* parent = nullptr;
if( o.parent_author != STEEM_ROOT_POST_PARENT )
{
parent = &_db.get_comment( o.parent_author, o.parent_permlink );
if( !_db.has_hardfork( STEEM_HARDFORK_0_17__767 ) )
FC_ASSERT( parent->depth < STEEM_MAX_COMMENT_DEPTH_PRE_HF17, "Comment is nested ${x} posts deep, maximum depth is ${y}.", ("x",parent->depth)("y",STEEM_MAX_COMMENT_DEPTH_PRE_HF17) );
else
FC_ASSERT( parent->depth < STEEM_MAX_COMMENT_DEPTH, "Comment is nested ${x} posts deep, maximum depth is ${y}.", ("x",parent->depth)("y",STEEM_MAX_COMMENT_DEPTH) );
}
FC_ASSERT( fc::is_utf8( o.json_metadata ), "JSON Metadata must be UTF-8" );
auto now = _db.head_block_time();
if ( itr == by_permlink_idx.end() )
{
if( o.parent_author != STEEM_ROOT_POST_PARENT )
{
FC_ASSERT( _db.get( parent->root_comment ).allow_replies, "The parent comment has disabled replies." );
if( _db.has_hardfork( STEEM_HARDFORK_0_12__177 ) && !_db.has_hardfork( STEEM_HARDFORK_0_17__869 ) )
FC_ASSERT( _db.calculate_discussion_payout_time( *parent ) != fc::time_point_sec::maximum(), "Discussion is frozen." );
}
FC_TODO( "Cleanup this logic after HF 20. Old ops don't need to check pre-hf20 times." )
if( _db.has_hardfork( STEEM_HARDFORK_0_20__2019 ) )
{
if( o.parent_author == STEEM_ROOT_POST_PARENT )
FC_ASSERT( ( now - auth.last_root_post ) > STEEM_MIN_ROOT_COMMENT_INTERVAL, "You may only post once every 5 minutes.", ("now",now)("last_root_post", auth.last_root_post) );
else
FC_ASSERT( (now - auth.last_post) >= STEEM_MIN_REPLY_INTERVAL_HF20, "You may only comment once every 3 seconds.", ("now",now)("auth.last_post",auth.last_post) );
}
else if( _db.has_hardfork( STEEM_HARDFORK_0_12__176 ) )
{
if( o.parent_author == STEEM_ROOT_POST_PARENT )
FC_ASSERT( ( now - auth.last_root_post ) > STEEM_MIN_ROOT_COMMENT_INTERVAL, "You may only post once every 5 minutes.", ("now",now)("last_root_post", auth.last_root_post) );
else
FC_ASSERT( (now - auth.last_post) > STEEM_MIN_REPLY_INTERVAL, "You may only comment once every 20 seconds.", ("now",now)("auth.last_post",auth.last_post) );
}
else if( _db.has_hardfork( STEEM_HARDFORK_0_6__113 ) )
{
if( o.parent_author == STEEM_ROOT_POST_PARENT )
FC_ASSERT( (now - auth.last_post) > STEEM_MIN_ROOT_COMMENT_INTERVAL, "You may only post once every 5 minutes.", ("now",now)("auth.last_post",auth.last_post) );
else
FC_ASSERT( (now - auth.last_post) > STEEM_MIN_REPLY_INTERVAL, "You may only comment once every 20 seconds.", ("now",now)("auth.last_post",auth.last_post) );
}
else
{
FC_ASSERT( (now - auth.last_post) > fc::seconds(60), "You may only post once per minute.", ("now",now)("auth.last_post",auth.last_post) );
}
uint16_t reward_weight = STEEM_100_PERCENT;
uint64_t post_bandwidth = auth.post_bandwidth;
if( _db.has_hardfork( STEEM_HARDFORK_0_12__176 ) && !_db.has_hardfork( STEEM_HARDFORK_0_17__733 ) && o.parent_author == STEEM_ROOT_POST_PARENT )
{
uint64_t post_delta_time = std::min( _db.head_block_time().sec_since_epoch() - auth.last_root_post.sec_since_epoch(), STEEM_POST_AVERAGE_WINDOW );
uint32_t old_weight = uint32_t( ( post_bandwidth * ( STEEM_POST_AVERAGE_WINDOW - post_delta_time ) ) / STEEM_POST_AVERAGE_WINDOW );
post_bandwidth = ( old_weight + STEEM_100_PERCENT );
reward_weight = uint16_t( std::min( ( STEEM_POST_WEIGHT_CONSTANT * STEEM_100_PERCENT ) / ( post_bandwidth * post_bandwidth ), uint64_t( STEEM_100_PERCENT ) ) );
}
_db.modify( auth, [&]( account_object& a ) {
if( o.parent_author == STEEM_ROOT_POST_PARENT )
{
a.last_root_post = now;
a.post_bandwidth = uint32_t( post_bandwidth );
}
a.last_post = now;
a.last_post_edit = now;
a.post_count++;
});
const auto& new_comment = _db.create< comment_object >( [&]( comment_object& com )
{
if( _db.has_hardfork( STEEM_HARDFORK_0_1 ) )
{
validate_permlink_0_1( o.parent_permlink );
validate_permlink_0_1( o.permlink );
}
com.author = o.author;
from_string( com.permlink, o.permlink );
com.last_update = _db.head_block_time();
com.created = com.last_update;
com.active = com.last_update;
com.last_payout = fc::time_point_sec::min();
com.max_cashout_time = fc::time_point_sec::maximum();
com.reward_weight = reward_weight;
if ( o.parent_author == STEEM_ROOT_POST_PARENT )
{
com.parent_author = "";
from_string( com.parent_permlink, o.parent_permlink );
from_string( com.category, o.parent_permlink );
com.root_comment = com.id;
com.cashout_time = _db.has_hardfork( STEEM_HARDFORK_0_12__177 ) ?
_db.head_block_time() + STEEM_CASHOUT_WINDOW_SECONDS_PRE_HF17 :
fc::time_point_sec::maximum();
}
else
{
com.parent_author = parent->author;
com.parent_permlink = parent->permlink;
com.depth = parent->depth + 1;
com.category = parent->category;
com.root_comment = parent->root_comment;
com.cashout_time = fc::time_point_sec::maximum();
}
if( _db.has_hardfork( STEEM_HARDFORK_0_17__769 ) )
{
com.cashout_time = com.created + STEEM_CASHOUT_WINDOW_SECONDS;
}
});
id = new_comment.id;
#ifndef IS_LOW_MEM
_db.create< comment_content_object >( [&]( comment_content_object& con )
{
con.comment = id;
from_string( con.title, o.title );
if( o.body.size() < 1024*1024*128 )
{
from_string( con.body, o.body );
}
from_string( con.json_metadata, o.json_metadata );
});
#endif
/// this loop can be skiped for validate-only nodes as it is merely gathering stats for indicies
auto now = _db.head_block_time();
while( parent ) {
_db.modify( *parent, [&]( comment_object& p ){
p.children++;
p.active = now;
});
#ifndef IS_LOW_MEM
if( parent->parent_author != STEEM_ROOT_POST_PARENT )
parent = &_db.get_comment( parent->parent_author, parent->parent_permlink );
else
#endif
parent = nullptr;
}
}
else // start edit case
{
const auto& comment = *itr;
if( _db.is_producing() || _db.has_hardfork( STEEM_HARDFORK_0_21__3313 ) )
{
FC_ASSERT( now - auth.last_post_edit >= STEEM_MIN_COMMENT_EDIT_INTERVAL, "Can only perform one comment edit per block." );
}
if( !_db.has_hardfork( STEEM_HARDFORK_0_17__772 ) )
{
if( _db.has_hardfork( STEEM_HARDFORK_0_14__306 ) )
FC_ASSERT( _db.calculate_discussion_payout_time( comment ) != fc::time_point_sec::maximum(), "The comment is archived." );
else if( _db.has_hardfork( STEEM_HARDFORK_0_10 ) )
FC_ASSERT( comment.last_payout == fc::time_point_sec::min(), "Can only edit during the first 24 hours." );
}
_db.modify( comment, [&]( comment_object& com )
{
com.last_update = _db.head_block_time();
com.active = com.last_update;
std::function< bool( const shared_string& a, const string& b ) > equal;
FC_TODO( "Check if this can be simplified after HF 21" );
if ( _db.has_hardfork( STEEM_HARDFORK_0_21__2203 ) )
equal = []( const shared_string& a, const string& b ) -> bool { return a.size() == b.size() && std::strcmp( a.c_str(), b.c_str() ) == 0; };
else
equal = []( const shared_string& a, const string& b ) -> bool { return a.size() == b.size() || std::strcmp( a.c_str(), b.c_str() ) == 0; };
if( !parent )
{
FC_ASSERT( com.parent_author == account_name_type(), "The parent of a comment cannot change." );
FC_ASSERT( equal( com.parent_permlink, o.parent_permlink ), "The permlink of a comment cannot change." );
}
else
{
FC_ASSERT( com.parent_author == o.parent_author, "The parent of a comment cannot change." );
FC_ASSERT( equal( com.parent_permlink, o.parent_permlink ), "The permlink of a comment cannot change." );
}
});
_db.modify( auth, [&]( account_object& a )
{
a.last_post_edit = now;
});
#ifndef IS_LOW_MEM
_db.modify( _db.get< comment_content_object, by_comment >( comment.id ), [&]( comment_content_object& con )
{
if( o.title.size() ) from_string( con.title, o.title );
if( o.json_metadata.size() )
from_string( con.json_metadata, o.json_metadata );
if( o.body.size() ) {
try {
diff_match_patch<std::wstring> dmp;
auto patch = dmp.patch_fromText( utf8_to_wstring(o.body) );
if( patch.size() ) {
auto result = dmp.patch_apply( patch, utf8_to_wstring( to_string( con.body ) ) );
auto patched_body = wstring_to_utf8(result.first);
if( !fc::is_utf8( patched_body ) ) {
idump(("invalid utf8")(patched_body));
from_string( con.body, fc::prune_invalid_utf8(patched_body) );
} else { from_string( con.body, patched_body ); }
}
else { // replace
from_string( con.body, o.body );
}
} catch ( ... ) {
from_string( con.body, o.body );
}
}
});
#endif
} // end EDIT case