@ -19,10 +19,13 @@
* @ date 2014
*/
# include <leveldb/db.h>
# include "BlockChain.h"
# if ETH_PROFILING_GPERF
# include <gperftools/profiler.h>
# endif
# include <leveldb/db.h>
# include <boost/timer.hpp>
# include <boost/filesystem.hpp>
# include <test/JsonSpiritHeaders.h>
# include <libdevcore/Common.h>
@ -33,6 +36,7 @@
# include <libethcore/Exceptions.h>
# include <libethcore/ProofOfWork.h>
# include <libethcore/BlockInfo.h>
# include <libethcore/Ethasher.h>
# include <liblll/Compiler.h>
# include "GenesisInfo.h"
# include "State.h"
@ -43,6 +47,7 @@ using namespace dev::eth;
namespace js = json_spirit ;
# define ETH_CATCH 1
# define ETH_TIMED_IMPORTS 0
std : : ostream & dev : : eth : : operator < < ( std : : ostream & _out , BlockChain const & _bc )
{
@ -63,7 +68,7 @@ std::ostream& dev::eth::operator<<(std::ostream& _out, BlockChain const& _bc)
return _out ;
}
ldb : : Slice dev : : eth : : t oSlice( h256 const & _h , unsigned _sub )
ldb : : Slice dev : : eth : : oldT oSlice( h256 const & _h , unsigned _sub )
{
# if ALL_COMPILERS_ARE_CPP11_COMPLIANT
static thread_local h256 h = _h ^ sha3 ( h256 ( u256 ( _sub ) ) ) ;
@ -77,6 +82,21 @@ ldb::Slice dev::eth::toSlice(h256 const& _h, unsigned _sub)
# endif
}
ldb : : Slice dev : : eth : : toSlice ( h256 const & _h , unsigned _sub )
{
# if ALL_COMPILERS_ARE_CPP11_COMPLIANT
static thread_local h256 h = _h ^ sha3 ( h256 ( u256 ( _sub ) ) ) ;
return ldb : : Slice ( ( char const * ) & h , 32 ) ;
# else
static boost : : thread_specific_ptr < FixedHash < 33 > > t_h ;
if ( ! t_h . get ( ) )
t_h . reset ( new FixedHash < 33 > ) ;
* t_h = FixedHash < 33 > ( _h ) ;
( * t_h ) [ 32 ] = ( uint8_t ) _sub ;
return ( ldb : : Slice ) t_h - > ref ( ) ; //(char const*)t_h.get(), 32);
# endif
}
# if ETH_DEBUG
static const chrono : : system_clock : : duration c_collectionDuration = chrono : : seconds ( 15 ) ;
static const unsigned c_collectionQueueSize = 2 ;
@ -146,7 +166,7 @@ void BlockChain::open(std::string const& _path, WithExisting _we)
}
}
if ( ! details ( m_genesisHash ) )
if ( _we ! = WithExisting : : Verify & & ! details ( m_genesisHash ) )
{
// Insert details of genesis block.
m_details [ m_genesisHash ] = BlockDetails ( 0 , c_genesisDifficulty , h256 ( ) , { } ) ;
@ -154,7 +174,9 @@ void BlockChain::open(std::string const& _path, WithExisting _we)
m_extrasDB - > Put ( m_writeOptions , toSlice ( m_genesisHash , ExtraDetails ) , ( ldb : : Slice ) dev : : ref ( r ) ) ;
}
# if ETH_PARANOIA
checkConsistency ( ) ;
# endif
// TODO: Implement ability to rebuild details map from DB.
std : : string l ;
@ -174,13 +196,21 @@ void BlockChain::close()
m_blocks . clear ( ) ;
}
# define IGNORE_EXCEPTIONS(X) try { X; } catch (...) {}
void BlockChain : : rebuild ( std : : string const & _path , std : : function < void ( unsigned , unsigned ) > const & _progress )
{
# if ETH_PROFILING_GPERF
ProfilerStart ( " BlockChain_rebuild.log " ) ;
# endif
// unsigned originalNumber = (unsigned)BlockInfo(oldBlock(m_lastBlockHash)).number;
unsigned originalNumber = number ( ) ;
// Keep extras DB around, but under a temp name
delete m_extrasDB ;
m_extrasDB = nullptr ;
IGNORE_EXCEPTIONS ( boost : : filesystem : : remove_all ( _path + " /details.old " ) ) ;
boost : : filesystem : : rename ( _path + " /details " , _path + " /details.old " ) ;
ldb : : DB * oldExtrasDB ;
ldb : : Options o ;
@ -189,7 +219,7 @@ void BlockChain::rebuild(std::string const& _path, std::function<void(unsigned,
ldb : : DB : : Open ( o , _path + " /details " , & m_extrasDB ) ;
// Open a fresh state DB
OverlayDB db = State : : openDB ( _path , WithExisting : : Kill ) ;
State s ( State : : openDB ( _path , WithExisting : : Kill ) , BaseState : : CanonGenesis ) ;
// Clear all memos ready for replay.
m_details . clear ( ) ;
@ -201,11 +231,30 @@ void BlockChain::rebuild(std::string const& _path, std::function<void(unsigned,
m_lastLastHashes . clear ( ) ;
m_lastBlockHash = genesisHash ( ) ;
for ( unsigned d = 0 ; d < originalNumber ; + + d )
h256 lastHash = genesisHash ( ) ;
boost : : timer t ;
for ( unsigned d = 1 ; d < originalNumber ; + + d )
{
if ( ! ( d % 1000 ) )
{
cerr < < " \n 1000 blocks in " < < t . elapsed ( ) < < " s = " < < ( 1000.0 / t . elapsed ( ) ) < < " b/s " < < endl ;
t . restart ( ) ;
}
try
{
import ( block ( queryExtras < BlockHash , ExtraBlockHash > ( h256 ( u256 ( d ) ) , m_blockHashes , x_blockHashes , NullBlockHash , oldExtrasDB ) . value ) , db ) ;
bytes b = block ( queryExtras < BlockHash , ExtraBlockHash > ( h256 ( u256 ( d ) ) , m_blockHashes , x_blockHashes , NullBlockHash , oldExtrasDB ) . value ) ;
BlockInfo bi ( b ) ;
if ( bi . number % c_ethashEpochLength = = 1 )
Ethasher : : get ( ) - > full ( bi ) ;
if ( bi . parentHash ! = lastHash )
{
cwarn < < " DISJOINT CHAIN DETECTED; " < < bi . hash ( ) . abridged ( ) < < " # " < < d < < " -> parent is " < < bi . parentHash . abridged ( ) < < " ; expected " < < lastHash . abridged ( ) < < " # " < < ( d - 1 ) ;
return ;
}
lastHash = bi . hash ( ) ;
import ( b , s . db ( ) , true ) ;
}
catch ( . . . )
{
@ -217,6 +266,10 @@ void BlockChain::rebuild(std::string const& _path, std::function<void(unsigned,
_progress ( d , originalNumber ) ;
}
# if ETH_PROFILING_GPERF
ProfilerStop ( ) ;
# endif
delete oldExtrasDB ;
boost : : filesystem : : remove_all ( _path + " /details.old " ) ;
}
@ -253,12 +306,12 @@ LastHashes BlockChain::lastHashes(unsigned _n) const
return m_lastLastHashes ;
}
h256s BlockChain : : sync ( BlockQueue & _bq , OverlayDB const & _stateDB , unsigned _max )
pair < h256s , bool > BlockChain : : sync ( BlockQueue & _bq , OverlayDB const & _stateDB , unsigned _max )
{
_bq . tick ( * this ) ;
vector < bytes > blocks ;
_bq . drain ( blocks ) ;
_bq . drain ( blocks , _max ) ;
h256s ret ;
for ( auto const & block : blocks )
@ -266,10 +319,7 @@ h256s BlockChain::sync(BlockQueue& _bq, OverlayDB const& _stateDB, unsigned _max
try
{
for ( auto h : import ( block , _stateDB ) )
if ( ! _max - - )
break ;
else
ret . push_back ( h ) ;
ret . push_back ( h ) ;
}
catch ( UnknownParent )
{
@ -284,15 +334,15 @@ h256s BlockChain::sync(BlockQueue& _bq, OverlayDB const& _stateDB, unsigned _max
catch ( . . . )
{ }
}
_bq . doneDrain ( ) ;
return ret ;
bool yetMore = _bq . doneDrain ( ) ;
return make_pair ( ret , yetMore ) ;
}
h256s BlockChain : : attemptImport ( bytes const & _block , OverlayDB const & _stateDB ) noexcept
h256s BlockChain : : attemptImport ( bytes const & _block , OverlayDB const & _stateDB , bool _force ) noexcept
{
try
{
return import ( _block , _stateDB ) ;
return import ( _block , _stateDB , _force ) ;
}
catch ( . . . )
{
@ -301,8 +351,20 @@ h256s BlockChain::attemptImport(bytes const& _block, OverlayDB const& _stateDB)
}
}
h256s BlockChain : : import ( bytes const & _block , OverlayDB const & _db )
h256s BlockChain : : import ( bytes const & _block , OverlayDB const & _db , bool _force )
{
//@tidy This is a behemoth of a method - could do to be split into a few smaller ones.
# if ETH_TIMED_IMPORTS
boost : : timer total ;
double preliminaryChecks ;
double enactment ;
double collation ;
double writing ;
double checkBest ;
boost : : timer t ;
# endif
// VERIFY: populates from the block and checks the block is internally coherent.
BlockInfo bi ;
@ -329,7 +391,7 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
auto newHash = BlockInfo : : headerHash ( _block ) ;
// Check block doesn't already exist first!
if ( isKnown ( newHash ) )
if ( isKnown ( newHash ) & & ! _force )
{
clog ( BlockChainNote ) < < newHash < < " : Not new. " ;
BOOST_THROW_EXCEPTION ( AlreadyHaveBlock ( ) ) ;
@ -362,6 +424,11 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
clog ( BlockChainNote ) < < " Attempting import of " < < newHash . abridged ( ) < < " ... " ;
# if ETH_TIMED_IMPORTS
preliminaryChecks = t . elapsed ( ) ;
t . restart ( ) ;
# endif
u256 td ;
# if ETH_CATCH
try
@ -369,8 +436,9 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
{
// Check transactions are valid and that they result in a state equivalent to our state_root.
// Get total difficulty increase and update state, checking it.
State s ( bi . coinbaseAddress , _db ) ;
State s ( _db ) ; //, bi.coinbaseAddress
auto tdIncrease = s . enactOn ( & _block , bi , * this ) ;
BlockLogBlooms blb ;
BlockReceipts br ;
for ( unsigned i = 0 ; i < s . pending ( ) . size ( ) ; + + i )
@ -381,6 +449,11 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
s . cleanup ( true ) ;
td = pd . totalDifficulty + tdIncrease ;
# if ETH_TIMED_IMPORTS
enactment = t . elapsed ( ) ;
t . restart ( ) ;
# endif
# if ETH_PARANOIA
checkConsistency ( ) ;
# endif
@ -397,37 +470,6 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
m_details [ newHash ] = BlockDetails ( ( unsigned ) pd . number + 1 , td , bi . parentHash , { } ) ;
m_details [ bi . parentHash ] . children . push_back ( newHash ) ;
}
{
WriteGuard l ( x_blockHashes ) ;
m_blockHashes [ h256 ( bi . number ) ] . value = newHash ;
}
h256s alteredBlooms ;
{
WriteGuard l ( x_blocksBlooms ) ;
LogBloom blockBloom = bi . logBloom ;
blockBloom . shiftBloom < 3 > ( sha3 ( bi . coinbaseAddress . ref ( ) ) ) ;
unsigned index = ( unsigned ) bi . number ;
for ( unsigned level = 0 ; level < c_bloomIndexLevels ; level + + , index / = c_bloomIndexSize )
{
unsigned i = index / c_bloomIndexSize ;
unsigned o = index % c_bloomIndexSize ;
alteredBlooms . push_back ( chunkId ( level , i ) ) ;
m_blocksBlooms [ alteredBlooms . back ( ) ] . blooms [ o ] | = blockBloom ;
}
}
// Collate transaction hashes and remember who they were.
h256s newTransactionAddresses ;
{
RLP blockRLP ( _block ) ;
TransactionAddress ta ;
ta . blockHash = newHash ;
WriteGuard l ( x_transactionAddresses ) ;
for ( ta . index = 0 ; ta . index < blockRLP [ 1 ] . itemCount ( ) ; + + ta . index )
{
newTransactionAddresses . push_back ( sha3 ( blockRLP [ 1 ] [ ta . index ] . data ( ) ) ) ;
m_transactionAddresses [ newTransactionAddresses . back ( ) ] = ta ;
}
}
{
WriteGuard l ( x_logBlooms ) ;
m_logBlooms [ newHash ] = blb ;
@ -437,25 +479,27 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
m_receipts [ newHash ] = br ;
}
# if ETH_TIMED_IMPORTS
collation = t . elapsed ( ) ;
t . restart ( ) ;
# endif
{
ReadGuard l1 ( x_blocksBlooms ) ;
ReadGuard l2 ( x_details ) ;
ReadGuard l3 ( x_blockHashes ) ;
ReadGuard l4 ( x_receipts ) ;
ReadGuard l5 ( x_logBlooms ) ;
ReadGuard l6 ( x_transactionAddresses ) ;
m_blocksDB - > Put ( m_writeOptions , toSlice ( newHash ) , ( ldb : : Slice ) ref ( _block ) ) ;
m_extrasDB - > Put ( m_writeOptions , toSlice ( newHash , ExtraDetails ) , ( ldb : : Slice ) dev : : ref ( m_details [ newHash ] . rlp ( ) ) ) ;
m_extrasDB - > Put ( m_writeOptions , toSlice ( bi . parentHash , ExtraDetails ) , ( ldb : : Slice ) dev : : ref ( m_details [ bi . parentHash ] . rlp ( ) ) ) ;
m_extrasDB - > Put ( m_writeOptions , toSlice ( h256 ( bi . number ) , ExtraBlockHash ) , ( ldb : : Slice ) dev : : ref ( m_blockHashes [ h256 ( bi . number ) ] . rlp ( ) ) ) ;
for ( auto const & h : newTransactionAddresses )
m_extrasDB - > Put ( m_writeOptions , toSlice ( h , ExtraTransactionAddress ) , ( ldb : : Slice ) dev : : ref ( m_transactionAddresses [ h ] . rlp ( ) ) ) ;
m_extrasDB - > Put ( m_writeOptions , toSlice ( newHash , ExtraLogBlooms ) , ( ldb : : Slice ) dev : : ref ( m_logBlooms [ newHash ] . rlp ( ) ) ) ;
m_extrasDB - > Put ( m_writeOptions , toSlice ( newHash , ExtraReceipts ) , ( ldb : : Slice ) dev : : ref ( m_receipts [ newHash ] . rlp ( ) ) ) ;
for ( auto const & h : alteredBlooms )
m_extrasDB - > Put ( m_writeOptions , toSlice ( h , ExtraBlocksBlooms ) , ( ldb : : Slice ) dev : : ref ( m_blocksBlooms [ h ] . rlp ( ) ) ) ;
}
# if ETH_TIMED_IMPORTS
writing = t . elapsed ( ) ;
t . restart ( ) ;
# endif
# if ETH_PARANOIA
checkConsistency ( ) ;
# endif
@ -471,7 +515,7 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
{
clog ( BlockChainWarn ) < < " Malformed block: " < < diagnostic_information ( _e ) ;
_e < < errinfo_comment ( " Malformed block " ) ;
clog ( BlockChainWarn ) < < " Block: " < < bi . hash ;
clog ( BlockChainWarn ) < < " Block: " < < bi . hash ( ) ;
clog ( BlockChainWarn ) < < bi ;
clog ( BlockChainWarn ) < < " Block parent: " < < bi . parentHash ;
clog ( BlockChainWarn ) < < BlockInfo ( block ( bi . parentHash ) ) ;
@ -493,16 +537,78 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
h256 last = currentHash ( ) ;
if ( td > details ( last ) . totalDifficulty )
{
ret = treeRoute ( last , newHash ) ;
h256 common ;
unsigned commonIndex ;
tie ( ret , common , commonIndex ) = treeRoute ( last , newHash ) ;
{
WriteGuard l ( x_lastBlockHash ) ;
m_lastBlockHash = newHash ;
}
noteCanonChanged ( ) ;
m_extrasDB - > Put ( m_writeOptions , ldb : : Slice ( " best " ) , ldb : : Slice ( ( char const * ) & newHash , 32 ) ) ;
// Most of the time these two will be equal - only when we're doing a chain revert will they not be
if ( common ! = last )
// If we are reverting previous blocks, we need to clear their blooms (in particular, to
// rebuild any higher level blooms that they contributed to).
clearBlockBlooms ( number ( common ) + 1 , number ( last ) + 1 ) ;
// Go through ret backwards until hash != last.parent and update m_transactionAddresses, m_blockHashes
for ( auto i = ret . rbegin ( ) ; i ! = ret . rend ( ) & & * i ! = common ; + + i )
{
auto b = block ( * i ) ;
BlockInfo bi ( b ) ;
// Collate logs into blooms.
h256s alteredBlooms ;
{
LogBloom blockBloom = bi . logBloom ;
blockBloom . shiftBloom < 3 > ( sha3 ( bi . coinbaseAddress . ref ( ) ) ) ;
// Pre-memoize everything we need before locking x_blocksBlooms
for ( unsigned level = 0 , index = ( unsigned ) bi . number ; level < c_bloomIndexLevels ; level + + , index / = c_bloomIndexSize )
blocksBlooms ( chunkId ( level , index / c_bloomIndexSize ) ) ;
WriteGuard l ( x_blocksBlooms ) ;
for ( unsigned level = 0 , index = ( unsigned ) bi . number ; level < c_bloomIndexLevels ; level + + , index / = c_bloomIndexSize )
{
unsigned i = index / c_bloomIndexSize ;
unsigned o = index % c_bloomIndexSize ;
alteredBlooms . push_back ( chunkId ( level , i ) ) ;
m_blocksBlooms [ alteredBlooms . back ( ) ] . blooms [ o ] | = blockBloom ;
}
}
// Collate transaction hashes and remember who they were.
h256s newTransactionAddresses ;
{
RLP blockRLP ( b ) ;
TransactionAddress ta ;
ta . blockHash = bi . hash ( ) ;
WriteGuard l ( x_transactionAddresses ) ;
for ( ta . index = 0 ; ta . index < blockRLP [ 1 ] . itemCount ( ) ; + + ta . index )
{
newTransactionAddresses . push_back ( sha3 ( blockRLP [ 1 ] [ ta . index ] . data ( ) ) ) ;
m_transactionAddresses [ newTransactionAddresses . back ( ) ] = ta ;
}
}
{
WriteGuard l ( x_blockHashes ) ;
m_blockHashes [ h256 ( bi . number ) ] . value = bi . hash ( ) ;
}
// Update database with them.
ReadGuard l1 ( x_blocksBlooms ) ;
ReadGuard l3 ( x_blockHashes ) ;
ReadGuard l6 ( x_transactionAddresses ) ;
for ( auto const & h : alteredBlooms )
m_extrasDB - > Put ( m_writeOptions , toSlice ( h , ExtraBlocksBlooms ) , ( ldb : : Slice ) dev : : ref ( m_blocksBlooms [ h ] . rlp ( ) ) ) ;
m_extrasDB - > Put ( m_writeOptions , toSlice ( h256 ( bi . number ) , ExtraBlockHash ) , ( ldb : : Slice ) dev : : ref ( m_blockHashes [ h256 ( bi . number ) ] . rlp ( ) ) ) ;
for ( auto const & h : newTransactionAddresses )
m_extrasDB - > Put ( m_writeOptions , toSlice ( h , ExtraTransactionAddress ) , ( ldb : : Slice ) dev : : ref ( m_transactionAddresses [ h ] . rlp ( ) ) ) ;
}
clog ( BlockChainNote ) < < " Imported and best " < < td < < " . Has " < < ( details ( bi . parentHash ) . children . size ( ) - 1 ) < < " siblings. Route: " < < toString ( ret ) ;
noteCanonChanged ( ) ;
StructuredLogger : : chainNewHead (
bi . headerHash ( WithoutNonce ) . abridged ( ) ,
bi . nonce . abridged ( ) ,
@ -514,14 +620,67 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db)
{
clog ( BlockChainNote ) < < " Imported but not best (oTD: " < < details ( last ) . totalDifficulty < < " > TD: " < < td < < " ) " ;
}
# if ETH_TIMED_IMPORTS
checkBest = t . elapsed ( ) ;
cnote < < " Import took: " < < total . elapsed ( ) ;
cnote < < " preliminaryChecks: " < < preliminaryChecks ;
cnote < < " enactment: " < < enactment ;
cnote < < " collation: " < < collation ;
cnote < < " writing: " < < writing ;
cnote < < " checkBest: " < < checkBest ;
# endif
return ret ;
}
h256s BlockChain : : treeRoute ( h256 const & _from , h256 const & _to , h256 * o_common , bool _pre , bool _post ) const
void BlockChain : : clearBlockBlooms ( unsigned _begin , unsigned _end )
{
// ... c c c c c c c c c c C o o o o o o
// ... /=15 /=21
// L0...| ' | ' | ' | ' | ' | ' | ' | 'b|x'x|x'x|x'e| /=11
// L1...| ' | ' | ' | ' b | x ' x | x ' e | /=6
// L2...| ' | ' b | x ' x | e /=3
// L3...| ' b | x ' e
// model: c_bloomIndexLevels = 4, c_bloomIndexSize = 2
// ... /=15 /=21
// L0...| ' ' ' | ' ' ' | ' ' ' | ' ' 'b|x'x'x'x|x'e' ' |
// L1...| ' ' ' b | x ' x ' e ' |
// L2...| b ' x ' e ' |
// model: c_bloomIndexLevels = 2, c_bloomIndexSize = 4
// algorithm doesn't have the best memoisation coherence, but eh well...
unsigned beginDirty = _begin ;
unsigned endDirty = _end ;
for ( unsigned level = 0 ; level < c_bloomIndexLevels ; level + + , beginDirty / = c_bloomIndexSize , endDirty = ( endDirty - 1 ) / c_bloomIndexSize + 1 )
{
// compute earliest & latest index for each level, rebuild from previous levels.
for ( unsigned item = beginDirty ; item ! = endDirty ; + + item )
{
unsigned bunch = item / c_bloomIndexSize ;
unsigned offset = item % c_bloomIndexSize ;
auto id = chunkId ( level , bunch ) ;
LogBloom acc ;
if ( ! ! level )
{
// rebuild the bloom from the previous (lower) level (if there is one).
auto lowerChunkId = chunkId ( level - 1 , item ) ;
for ( auto const & bloom : blocksBlooms ( lowerChunkId ) . blooms )
acc | = bloom ;
}
blocksBlooms ( id ) ; // make sure it has been memoized.
m_blocksBlooms [ id ] . blooms [ offset ] = acc ;
}
}
}
tuple < h256s , h256 , unsigned > BlockChain : : treeRoute ( h256 const & _from , h256 const & _to , bool _common , bool _pre , bool _post ) const
{
// cdebug << "treeRoute" << _from.abridged() << "..." << _to.abridged();
if ( ! _from | | ! _to )
return h256s ( ) ;
return make_tuple ( h256s ( ) , h256 ( ) , 0 ) ;
h256s ret ;
h256s back ;
unsigned fn = details ( _from ) . number ;
@ -553,20 +712,19 @@ h256s BlockChain::treeRoute(h256 const& _from, h256 const& _to, h256* o_common,
assert ( to ) ;
from = details ( from ) . parent ;
to = details ( to ) . parent ;
if ( _pre )
if ( _pre & & ( from ! = to | | _common ) )
ret . push_back ( from ) ;
if ( _post )
if ( _post & & ( from ! = to | | ( ! _pre & & _common ) ) )
back . push_back ( to ) ;
fn - - ;
tn - - ;
// cdebug << "from:" << fn << _from.abridged() << "; to:" << tn << _to.abridged();
}
if ( o_common )
* o_common = from ;
ret . reserve ( ret . size ( ) + back . size ( ) ) ;
for ( auto it = back . cbegin ( ) ; it ! = back . cend ( ) ; + + it )
unsigned i = ret . size ( ) - ( int ) ( _common & & ! ret . empty ( ) & & ! back . empty ( ) ) ;
for ( auto it = back . rbegin ( ) ; it ! = back . rend ( ) ; + + it )
ret . push_back ( * it ) ;
return ret ;
return make_tuple ( ret , from , i ) ;
}
void BlockChain : : noteUsed ( h256 const & _h , unsigned _extra ) const
@ -828,3 +986,33 @@ bytes BlockChain::block(h256 const& _hash) const
return m_blocks [ _hash ] ;
}
bytes BlockChain : : oldBlock ( h256 const & _hash ) const
{
if ( _hash = = m_genesisHash )
return m_genesisBlock ;
{
ReadGuard l ( x_blocks ) ;
auto it = m_blocks . find ( _hash ) ;
if ( it ! = m_blocks . end ( ) )
return it - > second ;
}
string d ;
m_blocksDB - > Get ( m_readOptions , oldToSlice ( _hash ) , & d ) ;
if ( ! d . size ( ) )
{
cwarn < < " Couldn't find requested block: " < < _hash . abridged ( ) ;
return bytes ( ) ;
}
WriteGuard l ( x_blocks ) ;
m_blocks [ _hash ] . resize ( d . size ( ) ) ;
memcpy ( m_blocks [ _hash ] . data ( ) , d . data ( ) , d . size ( ) ) ;
noteUsed ( _hash ) ;
return m_blocks [ _hash ] ;
}
CJentzsch
10 years ago