Creating PeerCoin Genesis Block - Help needed

Hello there,

I'm experimenting around with the creation of my own genesis block / own chain of peercoin. Unfortunately the only tutorial for this is for PeerShares, which is not maintained anymore.

From what I've read on forums and combined with the peershares tutorial, this is what I did, which unfortunately does not succeeed:

main.cpp commented out line 3222:

Code:

//hashGenesisBlock = uint256("00008d0d88095d31f6dbdbcf80f6e51f71adf2be15740301f5e05cc0f3b2d2c0");

main.cpp changed pszTimestamp on line 3271:

Code:

const char* pszTimestamp = "NYT 9-4-18 Facebooks Other Critics: Its Viral Stars";

Compiling goes OK, I get this since the hashMerkleRoot is the old one from peercoin chain

Quote

/peercoin/src$ ./peercoind
peercoind: main.cpp:3310: bool InitBlockIndex(): Assertion `block.hashMerkleRoot == uint256("0x3c2d8f85fab4d17aac558cc648a1a58acff0de6deb890c29985690052c5993c2")' failed.
Aborted (core dumped)

And the content of my debug.log:

Quote

> 2018-04-09 11:57:45 Opened LevelDB successfully
> 2018-04-09 11:57:45 Peercoin Network: genesis=0x0000000032fe677166d5 nBitsLimit=0x1d00ffff nBitsInitial=0x1c00ffff nStakeMinAge=2592000 nCoinbaseMaturity=500 nModifierInterval=21600
> 2018-04-09 11:57:45 LoadBlockIndexDB(): last block file = 0
> 2018-04-09 11:57:45 LoadBlockIndexDB(): synchronized checkpoint not read
> 2018-04-09 11:57:45 LoadBlockIndexDB(): synchronized checkpoint 0000000032fe677166d54963b62a4677d8957e87c508eaa4fd7eb1c880cd27e3
> 2018-04-09 11:57:45 LoadBlockIndexDB(): transaction index disabled
> 2018-04-09 11:57:45 Initializing databases...
> 2018-04-09 11:57:45 ba2c38d635163680e895cf4edf86153ccd73fab8fbcd73b00f3b4daefe21f3a4
> 2018-04-09 11:57:45 0000000032fe677166d54963b62a4677d8957e87c508eaa4fd7eb1c880cd27e3
> 2018-04-09 11:57:45 e947fc6a60eadcf5b9a891fd23633f44e42e5d70d2fd5390e7f0a016f45e60dc

from debug.log i retrieve the hashMerkleRoot which should be the last value (last line) and add it to line 3310 in main.cpp:

Code:

assert(block.hashMerkleRoot == uint256("0x72617357890cf4285cbfd9eaeebf6f25db7057b2b678cd8f5bfaa3080193e74f"));

Now I recompile again, get the genesisBlockHash from the debug file: in this case it should be (?): 2018-04-09 12:31:09 0000000032fe677166d54963b62a4677d8957e87c508eaa4fd7eb1c880cd27e3 and add it to main.cpp line 3222:

Code:

hashGenesisBlock = uint256("0000000032fe677166d54963b62a4677d8957e87c508eaa4fd7eb1c880cd27e3");

After last compile, this is my error:

Quote

> bibz@bibz-u:~/peercoin/src$ ./peercoind
> peercoind: main.cpp:3312: bool InitBlockIndex(): Assertion `hash == hashGenesisBlock' failed.
> Aborted (core dumped)

and debug.log:

Quote

> 2018-04-09 12:31:09 Peercoin version v0.6.2ppc-dirty (2018-03-10 20:21:14 +0300)
> 2018-04-09 12:31:09 Using OpenSSL version OpenSSL 1.0.2g 1 Mar 2016
> 2018-04-09 12:31:09 Default data directory /home/bibz/.peercoin
> 2018-04-09 12:31:09 Using data directory /home/bibz/.peercoin
> 2018-04-09 12:31:09 Using at most 125 connections (1024 file descriptors available)
> 2018-04-09 12:31:09 Using 12 threads for script verification
> 2018-04-09 12:31:09 init message: Verifying wallet...
> 2018-04-09 12:31:09 dbenv.open LogDir=/home/bibz/.peercoin/database ErrorFile=/home/bibz/.peercoin/db.log
> 2018-04-09 12:31:09 Bound to [::]:9901
> 2018-04-09 12:31:09 Bound to 0.0.0.0:9901
> 2018-04-09 12:31:09 init message: Loading block index...
> 2018-04-09 12:31:09 Opening LevelDB in /home/bibz/.peercoin/blocks/index
> 2018-04-09 12:31:09 Opened LevelDB successfully
> 2018-04-09 12:31:09 Opening LevelDB in /home/bibz/.peercoin/chainstate
> 2018-04-09 12:31:09 Opened LevelDB successfully
> 2018-04-09 12:31:09 Peercoin Network: genesis=0x0000000032fe677166d5 nBitsLimit=0x1d00ffff nBitsInitial=0x1c00ffff nStakeMinAge=2592000 nCoinbaseMaturity=500 nModifierInterval=21600
> 2018-04-09 12:31:09 LoadBlockIndexDB(): last block file = 0
> 2018-04-09 12:31:09 LoadBlockIndexDB(): synchronized checkpoint not read
> 2018-04-09 12:31:09 LoadBlockIndexDB(): synchronized checkpoint 0000000032fe677166d54963b62a4677d8957e87c508eaa4fd7eb1c880cd27e3
> 2018-04-09 12:31:09 LoadBlockIndexDB(): transaction index enabled
> 2018-04-09 12:31:09 Initializing databases...
> 2018-04-09 12:31:09 dc4cee563966e3aae37f8cab2cbc716204f81d21ca5298bbc718a2089e76f095
> 2018-04-09 12:31:09 0000000032fe677166d54963b62a4677d8957e87c508eaa4fd7eb1c880cd27e3
> 2018-04-09 12:31:09 72617357890cf4285cbfd9eaeebf6f25db7057b2b678cd8f5bfaa3080193e74f
> 2018-04-09 12:31:09 CBlock(hash=dc4cee563966e3aae37f8cab2cbc716204f81d21ca5298bbc718a2089e76f095, ver=1, hashPrevBlock=0000000000000000000000000000000000000000000000000000000000000000, hashMerkleRoot=72617357890cf4285cbfd9eaeebf6f25db7057b2b678cd8f5bfaa3080193e74f, nTime=1523275630, nBits=1d00ffff, nNonce=2179302059, vtx=1, vchBlockSig=)
> 2018-04-09 12:31:09 Coinbase(hash=72617357890cf4285cbfd9eaeebf6f25db7057b2b678cd8f5bfaa3080193e74f, nTime=1523275630, ver=1, vin.size=1, vout.size=1, nLockTime=0)
> CTxIn(COutPoint(0000000000000000000000000000000000000000000000000000000000000000, 4294967295), coinbase 04ffff001d020f27334e595420392d342d31382046616365626f6f6b73204f74686572204372697 46963733a2049747320566972616c205374617273)
> CTxOut(empty)
> vMerkleTree: 72617357890cf4285cbfd9eaeebf6f25db7057b2b678cd8f5bfaa3080193e74f

What am I doing wrong? Did I pick up the wrong genesisHash from debug.log? And what is the difference between

printf("%s\n", hash.ToString().c_str());

and

printf("%s\n", hashGenesisBlock.ToString().c_str());

The latter should be the hash of the genesis block which I need in line 3222, right?

Thanks in advance for the help. I'd be glad to setup a small tutorial / guide after I figure out what the problem is.

PS: I know this got asked way too often, but noone of the threads are for peercoin. Also the python script that generates the genesisblock fails for me. Probably since this is a PoW/PoS hybrid?

Topic: Creating PeerCoin Genesis Block - Help needed (Read 125 times)