Hey PereguineBerty

Thanks for the guide, it was helpful.

But I still have a question.  What does this do?

static inline int GetRequireHeight(const bool testnet = fTestNet)
  {
     return testnet ? 0 : 470000;
  }

Return 0 when on testnet and return 470000 when on mainnet, I guess, but what does in control exactly? Trying to adapt this for another coin and I don't quite understand this part.

Thanks