3
1
Many coins have dynamic block reward over the time, for example Bitcoin was 50BTC/block years ago and now 25BTC. My question is how is it defined in the source code ? I searched in Litecoin's source code but found nothing... Is it done manually by releasing a new version each xxxx blocks ?
4
The relevant function in the current latest git revision:
int64_t GetBlockValue(int nHeight, int64_t nFees)
{
int64_t nSubsidy = 50 * COIN;
// Subsidy is cut in half every 210,000 blocks which will occur approximately every 4 years.
nSubsidy >>= (nHeight / Params().SubsidyHalvingInterval());
return nSubsidy + nFees;
}
Which is used later in ConnectBlock(), as follows :
if (block.vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
return state.DoS(100,
error("ConnectBlock() : coinbase pays too much (actual=%"PRId64" vs limit=%"PRId64")",
block.vtx[0].GetValueOut(), GetBlockValue(pindex->nHeight, nFees)),
REJECT_INVALID, "coinbase too large");
