[Dev] Feathercoin 0.9.6.2 * Maintenance fix, build & upgrade issues notes.

wrapper

Sync speed test 0.9.6.2-dev using Bootstrap.dat

Interesting points to note :

Change over to Neoscrypt starts at 2:30 hrs or Hard Fork 4 - Block 432000

Blocks processed against time

0.9.6.1 sync speed test

Block Rate per minute against blocks

0.9.6.1 sync speed test

wrapper

Review if 0.9.x series Bitcoin Commits

0.9.6.3.x

Don’t poll showmyip.com, it doesn’t exist anymore

Fixes #4679.

This leaves us with only one candidate, checkip.dyndns.org.
GetMyExternalIP should be phased out as soon as possible.

https://github.com/bitcoin/bitcoin/commit/5332b0a429f42c49c4b70e71870f2202c0cfa844

wrapper

Testing @Bushstar fixes / regtest

Console message :
SSE2 unsupported, optimisations disabled

init.cpp ~L480

opt_flags = cpu_vec_exts();
    if(GetBoolArg("-sse2", true)) {
        /* Verify hardware SSE2 support */
        if(opt_flags & 0x00000020) {
            printf("SSE2 optimisations enabled\n");
            nNeoScryptOptions |= 0x1000;
        } else {
            printf("SSE2 unsupported, optimisations disabled\n");
        }
    } else {
        printf("SSE2 optimisations disabled\n");
    }

Notes

SSE2 stands for Streaming SIMD Extensions 2 which is a standard on processors for a long time. This will enhance the security of your hardware against malicious software attacks by viruses and other malware.

These three are actually a hard core requirement for Windows 8 installation. If anyone of them is missing, Windows 8 will not install on your computer. So this has to be taken care even before you buy a new license of Windows 8.

https://stackoverflow.com/questions/2403660/determine-processor-support-for-sse2

Call CPUID with eax = 1 to load the feature flags in to edx. Bit 26 is set if SSE2 is available.

https://gist.github.com/hi2p-perim/7855506

I’ve output the value of opt_flags
opt_flags : = 0 SSE2 optimisations disabled

Putting -sse2=false or true seemed to work , so -sse2 is true

ghostlander

It means the flags haven’t been set up properly. Maybe compiled without the assembly code.

wrapper

error message review review.

main.cpp ~L502, ~L 899, ~L2866, L898, L1502
miner…cpp L486
db.cpp L106

src/addrman.h ~L422 logprint, ~L411, logprint, ~L442 logprint

net.cpp ~L318 , L362
https://github.com/wrapperband/Feathercoin/commit/042e6c874b8e7a2a79b7daad2ffe6642efbcb291

netbase L360 LogPrint(),

checkpointsync.cpp L275, L291, L336 , L470, L381, L438, L444, L516,
https://github.com/wrapperband/Feathercoin/commit/161ac3d8ea70e17a324b5f835788f49fa6b597b3

rpcserver.cpp L666,

Bushstar

It should be adding the assembly, if you try and compile without setting AM_PROG_AS it complains. I’ll take a look at it and see what’s wrong.

wrapper

Error creating wallet.dat from scratch.

Works with release 0.9.6.1 Doesn’t work with --incompatible database.

BDB 4.8 and 5.1 have worked previously, seems to be issue with bdb 5.3

error creating a new wallet.dat. 0.9.6.2

EXCEPTION: St13runtime_error
CDB : Error 22, can’t open database wallet.dat
feathercoin in Runaway exception

Error initializing wallet database environment /home/wrapper/.feathercoin!

wrapper

@Cookieboy Docker Test set-ups OpenName?

https://michael.mckinnon.id.au/2016/05/13/building-a-namecoin-server-with-ubuntu-16-04/

wrapper

[FAQ] Is it trivial to change a Feathercoin portable wallet file to libdb 4.8?

Version 4.8 is not a requirement, just a recommendation. You can compile your own version and use newer versions of BDB by passing --with-incompatible-bdb to configure.

The main reason it is discouraged is because it breaks compatibility with the pre-built binaries. If you’re building from source you may not care.

But even if you do, it is trivial to convert your wallet back to a 4.8 wallet if you’re stuck with a 5.1 or 5.3 one. Use the bdb tools (packages db4.8-util db5.1-util on Ubuntu):

Code:

db5.1_dump wallet.dat.db5 | db4.8_load wallet.dat.db4

[Ref:]
https://bitcointalk.org/index.php?topic=502482.0

wrapper

0.9.6.2 resync from scratch - debug.log size

Debug.log size ~8GB

Example messages :

2017-09-08 11:01:02 FindStealthTransactions() tx:1a6d82536f8800f9535af0d921c9c4b0bd5ed63f7ed98d496ea489a3c96199d6,BOOST_$
2017-09-08 11:01:02 txout scriptPubKey= 02bdd2463b241c6983e30fcec049028bd35a2c46b27751267e097d7ea730d86477 OP_CHECKSIG
2017-09-08 11:01:02 txout hash = a70281794fa18919284ce0825bb97985be0fd5351d70790f18cb295171a032cf
2017-09-08 11:01:02 ProcessBlock: ACCEPTED
2017-09-08 11:01:02 ProcessBlock: Preliminary checks
2017-09-08 11:01:02 AcceptBlockHeader,nHeight=14138
2017-09-08 11:01:02 GetNextWorkRequired pindexLast block Height=14137,nBits=486604799
2017-09-08 11:01:02 GetNextWorkRequired the next block Height=14138
2017-09-08 11:01:02 GetNextWorkRequired fork
2017-09-08 11:01:02 ConnectBlock hashPrevBlock=da6f4030e5784d44bf6487f714f97364c4d1d4230c7921ac83fbdb0a75b3da9d
2017-09-08 11:01:02 ConnectBlock view.GetBestBlock()=da6f4030e5784d44bf6487f714f97364c4d1d4230c7921ac83fbdb0a75b3da9d
2017-09-08 11:01:02 AddToWalletIfInvolvingMe,hash=53e2bcbb25acf1d2a5f14f8fa21f1251ec533567ca9c0cf7431fe27944d4f55e .

2017-09-08 11:01:45 ERROR: ProcessBlock() : already have block 528 3d00776e6a58b274553a08f865f243e4c76d2ff2f2bdc80ae9d65$
2017-09-08 11:01:45 ERROR: ProcessBlock() : already have block 529 8f9ce5631e4da83f485bbaabd05b2103e2031cc171f3bd19c424f$
2017-09-08 11:01:45 ERROR: ProcessBlock() : already have block 530 5e552737f864c8e40b8870fa6005cda91801042e67d41f96a352b$


2017-09-08 11:13:59 BOOST_FOREACH nOutputIdOuter=1 ,find txout...
2017-09-08 11:13:59 txout scriptPubKey= OP_DUP OP_HASH160 70fd39db258cc19a4d89a3ab0e329927c1688e07 OP_EQUALVERIFY OP_CHECKSIG
2017-09-08 11:13:59 txout hash = 42c514bfd4afd25857c86633b4a645a94a15326308d42a4c63e42bc7a7f0d2d9
2017-09-08 11:13:59 AddToWalletIfInvolvingMe,hash=1dd3621d64f782e0c8200c4063283d38189d1c29976fb0597e674c4ef249c612 .
2017-09-08 11:13:59 FindStealthTransactions() tx:1dd3621d64f782e0c8200c4063283d38189d1c29976fb0597e674c4ef249c612,BOOST_FOREACH nOutputIdOuter=0 ,find txout...
2017-09-08 11:13:59 txout scriptPubKey= OP_DUP OP_HASH160 f1f717b9371a1a39a1c96f1138e0207f44e9b1fc OP_EQUALVERIFY OP_CHECKSIG
2017-09-08 11:13:59 txout hash = beee7a6b781b42fcb81f0e64be3df2e5d8b7dbad17ffb94ab258bd83e705a4fb
2017-09-08 11:13:59 BOOST_FOREACH nOutputIdOuter=1 ,find txout...

2017-09-08 11:48:16 AcceptBlockHeader,nHeight=212619 
2017-09-08 11:48:16 GetNextWorkRequired pindexLast block Height=212618,nBits=470153547 
2017-09-08 11:48:16 GetNextWorkRequired the next block Height=212619 
2017-09-08 11:48:16 GetNextWorkRequired fork
2017-09-08 11:48:16 Difficulty rules regular blocks 
2017-09-08 11:48:16 GetNextWorkRequired(), nActualTimespan = 4  before bounds
2017-09-08 11:48:16 RETARGET: nActualTimespanShort = 86, nActualTimespanMedium = 71, nActualTimespanLong = 65, nActualTimeSpanAvg = 74, nActualTimespan (damped) = 63
2017-09-08 11:48:16 RETARGET: nActualTimespan = 63 after bounds
2017-09-08 11:48:16 RETARGET: nTargetTimespan = 60, nTargetTimespan/nActualTimespan = 0.9524
2017-09-08 11:48:16 GetNextWorkRequired RETARGET
2017-09-08 11:48:16 nTargetTimespan = 60    nActualTimespan = 63
2017-09-08 11:48:16 Before: 1c05f94b  0000000005f94b00000000000000000000000000000000000000000000000000
2017-09-08 11:48:16 After:  1c0645c1  000000000645c1f3333333333333333333333333333333333333333333333333
2017-09-08 11:48:16 ConnectBlock hashPrevBlock=c99dcb4dfb188f08e113cc0227dbb078b91a2ba1eb211747df6e93c2a3c1f8f9 
2017-09-08 11:48:16 ConnectBlock view.GetBestBlock()=c99dcb4dfb188f08e113cc0227dbb078b91a2ba1eb211747df6e93c2a3c1f8f9

2017-09-08 18:06:29 txout hash = bb18e80f5d0fb64e8ef641b915529ac5e163a65c542117285e35fae601fb1e72
2017-09-08 18:06:29 ProcessBlock: ACCEPTED
2017-09-08 18:06:29 ProcessBlock: Preliminary checks 
2017-09-08 18:06:29 ERROR: matches claimed amount, CheckProofOfWork() : hash doesn't match nBits
2017-09-08 18:06:29 AcceptBlockHeader,nHeight=808507 
2017-09-08 18:06:29 GetNextWorkRequired pindexLast block Height=808506,nBits=471031556 
2017-09-08 18:06:29 GetNextWorkRequired the next block Height=808507

UpdateTip: new best=90ff2216fefd3585d6227b9ad98742c2dee0799950f96008c739853aeaa00a91  height=762942  log2_work=57.908051  tx=2002507  date=2015-06-23 16:01:34 progress=0.476417

Wellenreiter

@wrapper said in [Dev] Feathercoin 0.9.6.2 * Maintenance fix, build & upgrade issues notes.:

[FAQ] Is it trivial to change a Feathercoin portable wallet file to libdb 4.8?

Version 4.8 is not a requirement, just a recommendation. You can compile your own version and use newer versions of BDB by passing --with-incompatible-bdb to configure.

The main reason it is discouraged is because it breaks compatibility with the pre-built binaries. If you’re building from source you may not care.

But even if you do, it is trivial to convert your wallet back to a 4.8 wallet if you’re stuck with a 5.1 or 5.3 one. Use the bdb tools (packages db4.8-util db5.1-util on Ubuntu):

Code:
db5.1_dump wallet.dat.db5 | db4.8_load wallet.dat.db4
[Ref:]
https://bitcointalk.org/index.php?topic=502482.0

Well if one needs to convert the db, it would be easier to export the private keys, compile a wallet with the desired bdb version and import the private keys again.

Our precompiled Linux binaries contained in the installation packages care compiled with the default bdb contained in the distributions, so they will work on a given system/distribution.

wrapper

@Wellenreiter said in [Dev] Feathercoin 0.9.6.2 * Maintenance fix, build & upgrade issues notes.:

Well if one needs to convert the db, it would be easier to export the private keys, compile a wallet with the desired bdb version and import the private keys again.

Good idea but (re: Catch22) I can’t read the wallet.dat to export the private keys, as it says it is corrupt.

Wellenreiter

@wrapper

Always do backups in time ;)
you are in the worst situation, that can happen…

wrapper

A new version of zxing-cpp (zebra crossing QR code library), has been released.

https://github.com/glassechidna/zxing-cpp/pull/57

*   Installation working as a configuration package
*   Fix source listing to not use GLOB per CMake recommendation. Files
    are listed explicitly in source_files.cmake so that if file listing
    changes, CMake can detect it and regenerate as needed.
*   Added debug postfix for libs for side-by-side installation of different
    build variants (libzxing.lib and libzxing-debug.lib on Windows)

Notes:

*  Proper versioning is not being done in the installation config package. If a version is known, it should be added.
*  I had to comment out the windows-specific stuff (core/win32) because it caused compiler issues in Windows SDK headers.

wrapper

Sync test from Bootstrap.dat 0.9.6.2 – Debug.log spam messages 8.5GB 35-hours

Needs further investigation

This message It has been reported as superflous error, it does not seem to indicate a fault. It incorrectly specified error message.

ERROR: matches claimed amount, CheckProofOfWork() : hash doesn’t match nBits
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1502

Need “removing” from release build

FindStealthTransactions() tx:1a6d82536f8800f9535af0d921c9c4b0bd5ed63f7ed98d496ea489a3c96199d6,BOOST_$
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/wallet.cpp#L1961

txout scriptPubKey
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/wallet.cpp#L1985

txout hash =
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/wallet.cpp#L1986

ProcessBlock: ACCEPTED
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L3265

ProcessBlock: Preliminary checks
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L3198

AcceptBlockHeader,nHeight=
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L2936

GetNextWorkRequired pindexLast
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1313

GetNextWorkRequired the next block Height=14138
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1314

GetNextWorkRequired fork
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1323

ConnectBlock hashPrevBlock=
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1952

ConnectBlock view.GetBestBlock()=
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1953

AddToWalletIfInvolvingMe,hash=5
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/wallet.cpp#L708

ERROR: ProcessBlock() : already have block 528
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L3193

BOOST_FOREACH nOutputIdOuter=1 ,find txout…
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/wallet.cpp#L708

txout scriptPubKey= OP_DUP OP_HASH160
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/wallet.cpp#L1985

Difficulty rules regular blocks
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L3193

GetNextWorkRequired(), nActualTimespan = 4 before bounds
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1383

RETARGET: nActualTimespanShort = 86, nActualTimespanMedium = 71, nActualTimespanLong = 65, nActualTimeSpanAvg = 74, nActualTimespan (damped) = 63
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1442

RETARGET: nActualTimespan = 63 after bounds
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1465

RETARGET: nTargetTimespan = 60, nTargetTimespan/nActualTimespan = 0.9524
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1466

GetNextWorkRequired RETARGET
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1480

nTargetTimespan = 60 nActualTimespan = 63
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1481

Before: 1c05f94b 0000000005f94b00000000000000000000000000000000000000000000000000
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1482

After: 1c0645c1 000000000645c1f3333333333333333333333333333333333333333333333333
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L1483

UpdateTip: new best=90ff2216fefd3585d6227b9ad98742c2dee0799950f96008c739853aeaa00a91 height=762942 log2_work=57.908051 tx=2002507 date=2015-06-23 16:01:34 progress=0.476417
https://github.com/FeatherCoin/Feathercoin/blob/master-0.9/src/main.cpp#L2139

Wellenreiter

@wrapper said in [Dev] Feathercoin 0.9.6.2 * Maintenance fix, build & upgrade issues notes.:

A new version of zxing-cpp (zebra crossing QR code library), has been released.

Just triggered a build on the package repository.

wrapper

main.cpp#L1488

bool CheckProofOfWork(uint256 hash, unsigned int nBits)
{
    CBigNum bnTarget;
    bnTarget.SetCompact(nBits);

    // Check range
    if (bnTarget <= 0 || bnTarget > Params().ProofOfWorkLimit())
        return error("Check range CheckProofOfWork() : nBits below minimum work");

    // Check proof of work matches claimed amount
    //LogPrintf("CheckProofOfWork() hash=%s \n",hash.ToString().c_str());
    //LogPrintf("CheckProofOfWork() nBits=%i \n",nBits);
    //LogPrintf("CheckProofOfWork() bnTarget.getuint256=%s \n",bnTarget.getuint256().ToString().c_str());
    if (hash > bnTarget.getuint256())
        return error("matches claimed amount, CheckProofOfWork() : hash doesn't match nBits");

return true;

wrapper

First block with error message is block : 432000 (const int nForkFour = 432000;)

ERROR: matches claimed amount, CheckProofOfWork()

All blocks after that have the message, checked up to block 1877425

wrapper

Debug.log with additional getwork debug messages

2017-09-13 12:49:22 ProcessBlock: Preliminary checks
2017-09-13 12:49:22 CheckProofOfWork() hash=5e6ccf101129ccb808cea67cfbe94cf4784718214cfde7dc1909a0402ae1ef6d
2017-09-13 12:49:22 CheckProofOfWork() nBits=473517455
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=00000000394d8f00000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 ERROR: matches claimed amount, CheckProofOfWork() : hash doesn't match nBits
2017-09-13 12:49:22 CheckProofOfWork() hash=00000000058213077e5dc035dbe8a5425695dc8dce74806cbb2cdc225fafcb8e
2017-09-13 12:49:22 CheckProofOfWork() nBits=473517455
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=00000000394d8f00000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 AcceptBlockHeader,nHeight=436027
2017-09-13 12:49:22 GetNextWorkRequired pindexLast block Height=436026,nBits=473715109
2017-09-13 12:49:22 GetNextWorkRequired the next block Height=436027
2017-09-13 12:49:22 GetNextWorkRequired fork
2017-09-13 12:49:22 Difficulty rules regular blocks
2017-09-13 12:49:22 GetNextWorkRequired(), nActualTimespan = 15  before bounds
2017-09-13 12:49:22 RETARGET: nActualTimespanShort = 25, nActualTimespanMedium = 61, nActualTimespanLong = 61, nActualTimeSpanAvg = 49, nActua$
2017-09-13 12:49:22 CheckProofOfWork() hash=00000000058213077e5dc035dbe8a5425695dc8dce74806cbb2cdc225fafcb8e
2017-09-13 12:49:22 CheckProofOfWork() nBits=473517455
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=00000000394d8f00000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 CheckProofOfWork() hash=00000000058213077e5dc035dbe8a5425695dc8dce74806cbb2cdc225fafcb8e
2017-09-13 12:49:22 CheckProofOfWork() nBits=473517455
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=00000000394d8f00000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 CheckProofOfWork() hash=00000000058213077e5dc035dbe8a5425695dc8dce74806cbb2cdc225fafcb8e
2017-09-13 12:49:22 CheckProofOfWork() nBits=473517455
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=00000000394d8f00000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 ConnectBlock hashPrevBlock=a521017bff5487651b402d64e04b7a2c67972de92013976ddfc73409680a756b
2017-09-13 12:49:22 ConnectBlock view.GetBestBlock()=a521017bff5487651b402d64e04b7a2c67972de92013976ddfc73409680a756b
2017-09-13 12:49:22 AddToWalletIfInvolvingMe,hash=cf978ce4ae56e68df19853d101aa59f836b481ed49d430a081985a275c358f68 .
2017-09-13 12:49:22 FindStealthTransactions() tx:cf978ce4ae56e68df19853d101aa59f836b481ed49d430a081985a275c358f68,BOOST_FOREACH nOutputIdOuter$
2017-09-13 12:49:22 txout scriptPubKey= OP_DUP OP_HASH160 6016bc7b58ccc4f826213591cc8adfaebf922f6c OP_EQUALVERIFY OP_CHECKSIG
2017-09-13 12:49:22 txout hash = c7a5ccaede5d3271df6e5026bf80f2e7c6e895bf5a6d9b8f4f6a38536fcd3589
2017-09-13 12:49:22 UpdateTip: new best=3d352ee58088a8947481f692d1e23c77a301d8104458cae19f74e30faa65b01c  height=436027  log2_work=57.827711  $
2017-09-13 12:49:22 AddToWalletIfInvolvingMe,hash=cf978ce4ae56e68df19853d101aa59f836b481ed49d430a081985a275c358f68 .
2017-09-13 12:49:22 FindStealthTransactions() tx:cf978ce4ae56e68df19853d101aa59f836b481ed49d430a081985a275c358f68,BOOST_FOREACH nOutputIdOuter$
2017-09-13 12:49:22 txout scriptPubKey= OP_DUP OP_HASH160 6016bc7b58ccc4f826213591cc8adfaebf922f6c OP_EQUALVERIFY OP_CHECKSIG
2017-09-13 12:49:22 txout hash = c7a5ccaede5d3271df6e5026bf80f2e7c6e895bf5a6d9b8f4f6a38536fcd3589
2017-09-13 12:49:22 ProcessBlock: ACCEPTED
2017-09-13 12:49:22 ProcessBlock: Preliminary checks
2017-09-13 12:49:22 CheckProofOfWork() hash=0f97d9fef076fb1ab9d0c41c106a49f7a2017982ca27579162d6c358ac513af9
2017-09-13 12:49:22 CheckProofOfWork() nBits=473329684
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=0000000036701400000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 ERROR: matches claimed amount, CheckProofOfWork() : hash doesn't match nBits
2017-09-13 12:49:22 CheckProofOfWork() hash=0000000009706efc0793c5b26d4a24488be0224a8cb4889c87e003bfbb8f8879
2017-09-13 12:49:22 CheckProofOfWork() nBits=473329684
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=0000000036701400000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 AcceptBlockHeader,nHeight=436028
2017-09-13 12:49:22 GetNextWorkRequired pindexLast block Height=436027,nBits=473517455
2017-09-13 12:49:22 GetNextWorkRequired the next block Height=436028
2017-09-13 12:49:22 GetNextWorkRequired fork
2017-09-13 12:49:22 Difficulty rules regular blocks
2017-09-13 12:49:22 GetNextWorkRequired(), nActualTimespan = 38  before bounds
2017-09-13 12:49:22 RETARGET: nActualTimespanShort = 26, nActualTimespanMedium = 62, nActualTimespanLong = 61, nActualTimeSpanAvg = 49, nActualTimespan (damped) = 57
2017-09-13 12:49:22 CheckProofOfWork() hash=0000000009706efc0793c5b26d4a24488be0224a8cb4889c87e003bfbb8f8879
2017-09-13 12:49:22 CheckProofOfWork() nBits=473329684
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=0000000036701400000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 CheckProofOfWork() hash=0000000009706efc0793c5b26d4a24488be0224a8cb4889c87e003bfbb8f8879
2017-09-13 12:49:22 CheckProofOfWork() nBits=473329684
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=0000000036701400000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 CheckProofOfWork() hash=0000000009706efc0793c5b26d4a24488be0224a8cb4889c87e003bfbb8f8879
2017-09-13 12:49:22 CheckProofOfWork() nBits=473329684
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=0000000036701400000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 ConnectBlock hashPrevBlock=3d352ee58088a8947481f692d1e23c77a301d8104458cae19f74e30faa65b01c
2017-09-13 12:49:22 ConnectBlock view.GetBestBlock()=3d352ee58088a8947481f692d1e23c77a301d8104458cae19f74e30faa65b01c
2017-09-13 12:49:22 AddToWalletIfInvolvingMe,hash=b89f5d1e8aedb165a3c0580e32837c76f6f2d7f6eaf03dbf3156d2eba00e5388 .
2017-09-13 12:49:22 FindStealthTransactions() tx:b89f5d1e8aedb165a3c0580e32837c76f6f2d7f6eaf03dbf3156d2eba00e5388,BOOST_FOREACH nOutputIdOuter=0 ,find txout...
2017-09-13 12:49:22 txout scriptPubKey= OP_DUP OP_HASH160 070be0e13966f496623c0fcbe3a0d4152e902aa1 OP_EQUALVERIFY OP_CHECKSIG
2017-09-13 12:49:22 txout hash = f2572e4760d154f7708b57f62678d48ee5648a9098202dbeb4c59892274d72dd
2017-09-13 12:49:22 UpdateTip: new best=d5459fc95d834862683a71cd6bde98a0b526b2ef55a60b1ff99a6d17aae29198  height=436028  log2_work=57.827711  tx=1509604  date=2014-10-29 15:41:32 progress=0.356094
2017-09-13 12:49:22 AddToWalletIfInvolvingMe,hash=b89f5d1e8aedb165a3c0580e32837c76f6f2d7f6eaf03dbf3156d2eba00e5388 .
2017-09-13 12:49:22 FindStealthTransactions() tx:b89f5d1e8aedb165a3c0580e32837c76f6f2d7f6eaf03dbf3156d2eba00e5388,BOOST_FOREACH nOutputIdOuter=0 ,find txout...
2017-09-13 12:49:22 txout scriptPubKey= OP_DUP OP_HASH160 070be0e13966f496623c0fcbe3a0d4152e902aa1 OP_EQUALVERIFY OP_CHECKSIG
2017-09-13 12:49:22 txout hash = f2572e4760d154f7708b57f62678d48ee5648a9098202dbeb4c59892274d72dd
2017-09-13 12:49:22 ProcessBlock: ACCEPTED
2017-09-13 12:49:22 ProcessBlock: Preliminary checks
2017-09-13 12:49:22 CheckProofOfWork() hash=2c7b236bbcb89e395243e153677f86d16ba9844395730a3c1f5eb00bd7a93cc0
2017-09-13 12:49:22 CheckProofOfWork() nBits=473151302
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=0000000033b74600000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 ERROR: matches claimed amount, CheckProofOfWork() : hash doesn't match nBits
2017-09-13 12:49:22 CheckProofOfWork() hash=000000002010046f762ffa151be4d61323869f9bff6ee8955729cbfda8c0723c
2017-09-13 12:49:22 CheckProofOfWork() nBits=473151302
2017-09-13 12:49:22 CheckProofOfWork() bnTarget.getuint256=0000000033b74600000000000000000000000000000000000000000000000000
2017-09-13 12:49:22 AcceptBlockHeader,nHeight=436029
2017-09-13 12:49:22 GetNextWorkRequired pindexLast block Height=436028,nBits=473329684
2017-09-13 12:49:22 GetNextWorkRequired the next block Height=436029
2017-09-13 12:49:22 GetNextWorkRequired fork
2017-09-13 12:49:22 Difficulty rules regular blocks
2017-09-13 12:49:22 GetNextWorkRequired(), nActualTimespan = 43  before bounds
2017-09-13 12:49:22 RETARGET: nActualTimespanShort = 27, nActualTimespanMedium = 61, nActualTimespanLong = 61, nActualTimeSpanAvg = 49, nActualTimespan (damped) = 57

wrapper

The first time it does preliminary checks it says hash is different to what it then goes straight through CheckProofOfWork()…

hash=d31a46d558974e7b07c6f63a594bfba0fa435659ebca05108f669f58a6d34cfc

then :

hash=000000001bc0c162a3676627559a0ec6f62dd9876ad63d8382859d2ead802875

2017-09-13 12:48:46 CheckProofOfWork() hash=d31a46d558974e7b07c6f63a594bfba0fa435659ebca05108f669f58a6d34cfc 
2017-09-13 12:48:46 CheckProofOfWork() nBits=472148865 
2017-09-13 12:48:46 CheckProofOfWork() bnTarget.getuint256=00000000246b8100000000000000000000000000000000000000000000000000 
2017-09-13 12:48:46 ERROR: matches claimed amount, CheckProofOfWork() : hash doesn't match nBits
2017-09-13 12:48:46 CheckProofOfWork() hash=000000001bc0c162a3676627559a0ec6f62dd9876ad63d8382859d2ead802875