In the validation.cpp file, the following parameters should be edited:

• Block value
• Block reward
• Block time
• Difficulty re-target time
• Difficulty re-target scale

The block value should be changed in the GetBlockSubsidy() function:

CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams)
{
 int halvings = nHeight / consensusParams.nSubsidyHalvingInterval;
 // Force block reward to zero when right shift is undefined.
 if (halvings >= 64)
 return 0;

 CAmount nSubsidy = 50 * COIN;
 // Subsidy is cut in half every 210,000 blocks which will occur approximately every 4 years.
 nSubsidy >>= halvings;
 return nSubsidy;
}