Im trying to learn how is it possible to Hard Fork an Altcoin Blockchain to Continue the Mining Phase after the LAST POW BLOCK. The Block Reward is already 0 and the LAST POW stops at Block 8000. And want to know if there is a way to continue the mining after the 8000 without any SYNC Problem and Stuck Problem.

  • What have you tried so far? How much C++ experience do you have? Can you build the altcoin you're modifying?
    – Nick ODell
    Nov 27, 2014 at 18:27
  • The Coin is already built working without any issue. The only thing is I want to extend the POW after the LAST BLOCK 8000. And then I will be updating the nodes. My experience in C++ is Medium but I totally understand how the Blockchain works and how to compile the Wallets (Win, Mac and Linux). Thanks!
    – druim
    Nov 27, 2014 at 20:48
  • Did you create this altcoin? Is PoW stopping at block 8000 because of a bug, or because of an intentional limitation?
    – Nick ODell
    Nov 27, 2014 at 21:28
  • Yes! I created it myself. It is a POW/POS Coin with all the coin mined on the first block and then 0 reward until LAST BLOCK 8000 and it stays full POS ... BUT I dont want that for NOW ...I want to extend the POW 0 reward block
    – druim
    Nov 27, 2014 at 21:44
  • I don't understand. If all the coins are premined why is there ever a need for POW reward? Nov 29, 2014 at 5:12

2 Answers 2


I don't know ,if you created the coin ,it will be very easy for u to extend the pos margin block area(those pow blocks:>)You not only need to differ the blocks when CreateNewBlock by nBestBlockHeight but also need to do some modifies in "getblock" message blocktype checking. That's all i got ; If this helps please tip me some reputations guys,this new "50 reputation" for comments nearly silent me .


This is simply done by around 6 changes. Check/follow this commit.

This enable again pow blocks even if the last pow block is hit.

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