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Topic: How to create unique genesis block? (Read 233 times)

wsxdrfv
jr. member
Activity: 413
Merit: 5
How to create unique genesis block?
February 17, 2018, 08:40:47 AM
#10
holy.....

My ubuntu system's harddisk inside virtualbox from windows10 become full...(started 20giga )

I should enlarge the harddisk capacity for test further!

But this is incredibly hard... already googled and tried some, but failed...

wsxdrfv
jr. member
Activity: 413
Merit: 5
Re: How to create unique genesis block?
February 17, 2018, 06:55:50 AM
#9
Quote from: Naruby on February 15, 2018, 11:53:37 AM
1) Use https://github.com/lhartikk/GenesisH0 to generat the merkle and Genesis hash & nonce
2) fill in this values & recompile
3) delete previous chain data
4) run Forest run!
Actually, I don't know exactly whether I did is wrong or right.

from 1), What value should input? And accordingly, what value should my script should be revised?
wsxdrfv
jr. member
Activity: 413
Merit: 5
Re: How to create unique genesis block?
February 17, 2018, 06:20:02 AM
#8
Quote from: Naruby on February 15, 2018, 11:53:37 AM
1) Use https://github.com/lhartikk/GenesisH0 to generat the merkle and Genesis hash & nonce
2) fill in this values & recompile
3) delete previous chain data
4) run Forest run!
I did and run ./litecoind but it says  

litecoind: chainparams.cpp:168: CMainParams::CMainParams(): Assertion 'consensus.hashGenesisBlock == unit256s("0xfdjlkfejlfkejlfk...............")' failed.
Aborted (core dumped)



wsxdrfv
jr. member
Activity: 413
Merit: 5
Re: How to create unique genesis block?
February 17, 2018, 01:45:35 AM
#7
So now I deleted all codes above (older code of create genesis block), now maintaining only these.

Code:
pchMessageStart[3] = 0xd3;
        nDefaultPort = 9333;
        nPruneAfterHeight = 100000;

        genesis = CreateGenesisBlock(1518778737, 1710046, 0x1e0ffff0, 1, 250 * COIN);
        //consensus.hashGenesisBlock = genesis.GetHash();
 
        assert(consensus.hashGenesisBlock == uint256S("0x0d357190f429e82365d6984079f3e3fc53877f4933ff2e8ba827a29c105a661e"));
        assert(genesis.hashMerkleRoot == uint256S("0xb7c1c74cb0c35b995bef99ccc9c4eb98dc688d97e5826a1740119fe9fa257770"));

        // Note that of those with the service bits flag, most only support a subset of possible options
        vSeeds.emplace_back("wsxdrvps.cafe24.com", true);

        base58Prefixes[PUBKEY_ADDRESS] = std::vector(1,33);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector(1,90);
        base58Prefixes[SCRIPT_ADDRESS2] = std::vector(1,50);
        base58Prefixes[SECRET_KEY] =     std::vector(1,130);
        base58Prefixes[EXT_PUBLIC_KEY] = {0x02, 0x88, 0xB3, 0x1F};
        base58Prefixes[EXT_SECRET_KEY] = {0x02, 0x88, 0xAB, 0xE3};

        vFixedSeeds.clear();

        fDefaultConsistencyChecks = false;
        fRequireStandard = true;
        fMineBlocksOnDemand = false;

        checkpointData = (CCheckpointData) {
            {
                {  0, uint256S("0x001")},
            }
        };

        chainTxData = ChainTxData{
            // Data as of block 59c9b9d3fec105bdc716d84caa7579503d5b05b73618d0bf2d5fa639f780a011 (height 1353397).
            1518692559, // * UNIX timestamp of last known number of transactions
            0,  // * total number of transactions between genesis and that timestamp
                    //   (the tx=... number in the SetBestChain debug.log lines)
            0.06     // * estimated number of transactions per second after that timestamp
        };

almost same with original.

And typed 'make', and run './litecoind   
But here is result.

-----------
ubuntu@ubuntu-VirtualBox:~/Desktop/litecoin/src$ ./litecoind
litecoind: chainparams.cpp:126: CMainParams::CMainParams(): Assertion `consensus.hashGenesisBlock == uint256S("0x0d357190f429e82365d6984079f3e3fc53877f4933ff2e8ba827a29c105a661e")' failed.
Aborted (core dumped)
-------------

Now what shoud I do?
Thanks in advance.
wsxdrfv
jr. member
Activity: 413
Merit: 5
Re: How to create unique genesis block?
February 16, 2018, 09:34:05 AM
#6
What code should be for new source?

I found 2 codes for generate genesis block, but both fails with new source.

Here are 2.

Code:
hashGenesisBlock = uint256("0x01")
if (true && genesis.GetHash() != hashGenesisBlock)
        {
            Logprintf("recalculating params for mainnet.\n");
            Logprintf("old mainnet genesis nonce: %s\n", genesis.nNonce.ToString().c_str());
            Logprintf("old mainnet genesis hash:  %s\n", hashGenesisBlock.ToString().c_str());
            // deliberately empty for loop finds nonce value.
            for(genesis.nNonce == 0; genesis.GetHash() > bnProofOfWorkLimit; genesis.nNonce++){ }
            Logprintf("new mainnet genesis merkle root: %s\n", genesis.hashMerkleRoot.ToString().c_str());
            Logprintf("new mainnet genesis nonce: %s\n", genesis.nNonce.ToString().c_str());
            Logprintf("new mainnet genesis hash: %s\n", genesis.GetHash().ToString().c_str());
        }

Code:
if (false && block.GetHash() != hashGenesisBlock)
        {
            printf("Searching for genesis block...\n");
            // This will figure out a valid hash and Nonce if you're
            // creating a different genesis block:
            uint256 hashTarget = CBigNum().SetCompact(block.nBits).getuint256();
            uint256 thash;
            char scratchpad[SCRYPT_SCRATCHPAD_SIZE];
 
            loop
            {
#if defined(USE_SSE2)
                // Detection would work, but in cases where we KNOW it always has SSE2,
                // it is faster to use directly than to use a function pointer or conditional.
#if defined(_M_X64) || defined(__x86_64__) || defined(_M_AMD64) || (defined(MAC_OSX) && defined(__i386__))
                // Always SSE2: x86_64 or Intel MacOS X
                scrypt_1024_1_1_256_sp_sse2(BEGIN(block.nVersion), BEGIN(thash), scratchpad);
#else
                // Detect SSE2: 32bit x86 Linux or Windows
                scrypt_1024_1_1_256_sp(BEGIN(block.nVersion), BEGIN(thash), scratchpad);
#endif
#else
                // Generic scrypt
                scrypt_1024_1_1_256_sp_generic(BEGIN(block.nVersion), BEGIN(thash), scratchpad);
#endif
                if (thash <= hashTarget)
                    break;
                if ((block.nNonce & 0xFFF) == 0)
                {
                    printf("nonce %08X: hash = %s (target = %s)\n", block.nNonce, thash.ToString().c_str(), hashTarget.ToString().c_str());
                }
                ++block.nNonce;
                if (block.nNonce == 0)
                {
                    printf("NONCE WRAPPED, incrementing time\n");
                    ++block.nTime;
                }
            }
            printf("block.nTime = %u \n", block.nTime);
            printf("block.nNonce = %u \n", block.nNonce);
            printf("block.GetHash = %s\n", block.GetHash().ToString().c_str());
        }

1st is based on bitcoin 0.10

2nd is based on litecoin 0.8

So how code should be revised and positioned to use for new source? (0.15~)
G14tz87
full member
Activity: 321
Merit: 100
Re: How to create unique genesis block?
February 16, 2018, 08:34:56 AM
#5
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wsxdrfv
jr. member
Activity: 413
Merit: 5
Re: How to create unique genesis block?
February 16, 2018, 06:23:12 AM
#4
so it should first install python package before install scrypt.

anyway, I succeedeed run python genesis.py -a scrypt -z "Now is 2018-xx-xx."

and bunch of values generated. 
wsxdrfv
jr. member
Activity: 413
Merit: 5
Re: How to create unique genesis block?
February 16, 2018, 01:13:13 AM
#3
Quote from: Naruby on February 15, 2018, 11:53:37 AM
1) Use https://github.com/lhartikk/GenesisH0 to generat the merkle and Genesis hash & nonce
2) fill in this values & recompile
3) delete previous chain data
4) run Forest run!
Thanks, but when I typed 'sudo pip install....' at terminal, system says [sudo : pip : command not found ] ....

Why unix system so complicated... really frustrating...


So I install python, then typed [ python genesis.py -a scrypt -z "Now is 2018" ]

Then error says

File "genesis.py", line 2, in import scrypt
ImportError : No modile named scrypt

Naruby
newbie
Activity: 25
Merit: 0
Re: How to create unique genesis block?
February 15, 2018, 11:53:37 AM
#2
1) Use https://github.com/lhartikk/GenesisH0 to generat the merkle and Genesis hash & nonce
2) fill in this values & recompile
3) delete previous chain data
4) run Forest run!
wsxdrfv
jr. member
Activity: 413
Merit: 5
Re: How to create unique genesis block?
February 15, 2018, 10:30:28 AM
#1
I am researching bitcoin/litecoin source.

I am trying to revise and start new block, create genesis block.

So I changed genesisOutputScript variable at chainparams.cpp  52 line, via [ cat genesiscoinbase.hex ]

and then changed below line's source like following..


Code:
pchMessageStart[2] = 0xb1;
        pchMessageStart[3] = 0xde;
        nDefaultPort = 2454;
        nPruneAfterHeight = 100000;

        genesis = CreateGenesisBlock(1518706741, 2084524493, 0x1e0ffff0, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
printf("genesis.GetHash = %s\n", genesis.GetHash().ToString().c_str());
printf("genesis.hashMerkleRoot = %s\n", genesis.hashMerkleRoot.ToString().c_str());
        assert(consensus.hashGenesisBlock == uint256S("0xf333b8dff21df2ec0034590afa921a09e43ff41c5c8e5ac10cd83bf17615554d"));
        assert(genesis.hashMerkleRoot == uint256S("0xc4ef14392acd1d6123ab6b4497601f2a164e50f5da77903dc7e2ad1a8fa25f2d"));

        // Note that of those with the service bits flag, most only support a subset of possible options
        vSeeds.emplace_back("something.something.com", true);

        base58Prefixes[PUBKEY_ADDRESS] = std::vector(1, 55);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector(1, 55);
        base58Prefixes[SCRIPT_ADDRESS2] = std::vector(1, 55);
        base58Prefixes[SECRET_KEY] =     std::vector(1,176);
        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};

        vFixedSeeds = std::vector(pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));

        fDefaultConsistencyChecks = false;
        fRequireStandard = true;
        fMineBlocksOnDemand = false;

        checkpointData = (CCheckpointData) {
            {
                {  0, uint256S("0x001")},
            }
        };

        chainTxData = ChainTxData{
            // Data as of block 59c9b9d3fec105bdc716d84caa7579503d5b05b73618d0bf2d5fa639f780a011 (height 1353397).
            1518706741, // * UNIX timestamp of last known number of transactions
            0,  // * total number of transactions between genesis and that timestamp
                    //   (the tx=... number in the SetBestChain debug.log lines)
            0.06     // * estimated number of transactions per second after that timestamp
        };

but after compile this with 'make' , then run ./litecoind  ,
error says,

genesis.GetHash = f333b8dff21df2ec0034590afa921a09e43ff41c5c8e5ac10cd83bf17615554d
genesis.hashMerkleRoot = c4ef14392acd1d6123ab6b4497601f2a164e50f5da77903dc7e2ad1a8fa25f2d
Error: Error: A fatal internal error occurred, see debug.log for details
Segmentation fault (core dumped)


and here is debug.log file says,

2018-02-15 15:23:10 Litecoin version v0.15.1.0-845fc69ab-dirty
2018-02-15 15:23:10 InitParameterInteraction: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1
2018-02-15 15:23:10 Assuming ancestors of block 59c9b9d3fec105bdc716d84caa7579503d5b05b73618d0bf2d5fa639f780a011 have valid signatures.
2018-02-15 15:23:10 Setting nMinimumChainWork=00000000000000000000000000000000000000000000002ebcfe2dd9eff82666
2018-02-15 15:23:10 Using the 'standard' SHA256 implementation
2018-02-15 15:23:10 Using RdRand as an additional entropy source
2018-02-15 15:23:10 Default data directory /home/ubuntu/.litecoin
2018-02-15 15:23:10 Using data directory /home/ubuntu/.litecoin
2018-02-15 15:23:10 Using config file /home/ubuntu/.litecoin/litecoin.conf
2018-02-15 15:23:10 Using at most 125 automatic connections (1024 file descriptors available)
2018-02-15 15:23:10 Using 16 MiB out of 32/2 requested for signature cache, able to store 524288 elements
2018-02-15 15:23:10 Using 16 MiB out of 32/2 requested for script execution cache, able to store 524288 elements
2018-02-15 15:23:10 Using 4 threads for script verification
2018-02-15 15:23:10 scheduler thread start
2018-02-15 15:23:10 HTTP: creating work queue of depth 16
2018-02-15 15:23:10 No rpcpassword set - using random cookie authentication
2018-02-15 15:23:10 Generated RPC authentication cookie /home/ubuntu/.litecoin/.cookie
2018-02-15 15:23:10 HTTP: starting 4 worker threads
2018-02-15 15:23:10 init message: Verifying wallet(s)...
2018-02-15 15:23:10 Using BerkeleyDB version Berkeley DB 4.8.30: (April  9, 2010)
2018-02-15 15:23:10 Using wallet wallet.dat
2018-02-15 15:23:10 CDBEnv::Open: LogDir=/home/ubuntu/.litecoin/database ErrorFile=/home/ubuntu/.litecoin/db.log
2018-02-15 15:23:10 Cache configuration:
2018-02-15 15:23:10 * Using 2.0MiB for block index database
2018-02-15 15:23:10 * Using 8.0MiB for chain state database
2018-02-15 15:23:10 * Using 440.0MiB for in-memory UTXO set (plus up to 286.1MiB of unused mempool space)
2018-02-15 15:23:10 init message: Loading block index...
2018-02-15 15:23:10 Opening LevelDB in /home/ubuntu/.litecoin/blocks/index
2018-02-15 15:23:10 Opened LevelDB successfully
2018-02-15 15:23:10 Using obfuscation key for /home/ubuntu/.litecoin/blocks/index: 0000000000000000
2018-02-15 15:23:10 LoadBlockIndexDB: last block file = 0
2018-02-15 15:23:10 LoadBlockIndexDB: last block file info: CBlockFileInfo(blocks=0, size=0, heights=0...0, time=1970-01-01...1970-01-01)
2018-02-15 15:23:10 Checking all blk files are present...
2018-02-15 15:23:10 LoadBlockIndexDB: transaction index disabled
2018-02-15 15:23:10 Initializing databases...
2018-02-15 15:23:10 Pre-allocating up to position 0x1000000 in blk00000.dat
2018-02-15 15:23:10 Opening LevelDB in /home/ubuntu/.litecoin/chainstate
2018-02-15 15:23:10 Opened LevelDB successfully
2018-02-15 15:23:10 Wrote new obfuscate key for /home/ubuntu/.litecoin/chainstate: 926d8d907f958c5b
2018-02-15 15:23:10 Using obfuscation key for /home/ubuntu/.litecoin/chainstate: 926d8d907f958c5b
2018-02-15 15:23:10 init message: Rewinding blocks...
2018-02-15 15:23:10  block index              18ms
2018-02-15 15:23:10 init message: Loading wallet...
2018-02-15 15:23:10 nFileVersion = 150100
2018-02-15 15:23:10 Keys: 0 plaintext, 0 encrypted, 0 w/ metadata, 0 total
2018-02-15 15:23:10 Performing wallet upgrade to 60000
2018-02-15 15:23:10 keypool added 2000 keys (1000 internal), size=2000 (1000 internal)
2018-02-15 15:23:10 keypool reserve 1
2018-02-15 15:23:10 keypool keep 1
2018-02-15 15:23:10  wallet                  738ms
2018-02-15 15:23:10 keypool added 1 keys (0 internal), size=2000 (1000 internal)
2018-02-15 15:23:10 setKeyPool.size() = 2000
2018-02-15 15:23:10 mapWallet.size() = 0
2018-02-15 15:23:10 mapAddressBook.size() = 1
2018-02-15 15:23:10 ERROR: ReadBlockFromDisk: Errors in block header at CBlockDiskPos(nFile=0, nPos=8)
2018-02-15 15:23:10 *** Failed to read block
2018-02-15 15:23:10 Error: Error: A fatal internal error occurred, see debug.log for details


So what is the problem? What am I missing? How to fix and can make my own genesis block?

Thanks.
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