How to create altcoin - Mining genesis block guide for POW POS or Masternode

Hello guys! In this video I will show you how to create genesis block for PoS coin

This guide only show you how to mine a genesis block and few other changes, so this is not a complete guide.

we'll use blackcoin for this guide
Since Blackcoin is PoS
Download and extract Blackcoin source from https://github.com/CoinBlack/blackcoin
I will extract Blackcoin on mnt folder and rename it to supercoin

We'll start with rename the coin

cd mnt/supercoin

Replace Blackcoin to supercoin

Rename BLC to SPC

Then we change port

Replace The RPCport too

Create a new folder for pubkey
For me, I create Pubkey folder on mnt so i was easier for me to find them

Mainnet pubkey

Testnet pubkey

Now we get the pub key for mainnet
cat genesiscoinbase.hex
pubkey:

and for the testnet
cat testnetalert.hex
pubkey:

Now we change pchMessageStart from line 51 until line 54
testnet pchMessageStart from line 124 until 127
CRegTestParams pchMessageStart from line 164 until line 167

Change the start address letter form B to S
https://en.bitcoin.it/wiki/List_of_address_prefixes

change the testnet Starting letter from d to s

Now we change last POW from 10000 to 5000
chainparams.ccp
Line 98

Change the min confirmation from 500 to 50
Main.ccp
Line 45

Change stake minimun age from 8 hour to 3 hour
Line 46

Before mine a genesis block we need to change this few line

mainnet vAlertPubKey
Testnet vAlertPubKey
Change the psztimestamp
change the unixtimestamp: line 75 and 80 for mainnet
change genesis.nNonce to 0: line 82
assert hashGenesisBlock to 0x01

put the mining genesis code
recompile

Alright! compile is done we move to the next step

Now we can mine the genesis block!
Run supercoind wait for it until you get error like this one

This will take a while.. we'll skip the video.

supercoind: chainparams.cpp:115: CMainParams::CMainParams(): Assertion `hashGenesisBlock == uint256("0x01")' failed.
Aborted (core dumped)

Now we got the genesis!

copy the log on your terminal and paste it on chainparams.ccp
genesis.nNonce
genesis.GetHash
genesis.hashMerkleRoot

do the same for testnet and regtest

Congratulations!! Now you have the genesis block!

You need to add seednode on chaiparams.ccp for connection. I will show you how to do that in the next video!

In the next video I will show you how to create genesis for Masternode coin changing the block reward, seednode, checkpoint and premine.
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