Hi @lornestar this is a slightly tricky one based on how the rewards work because there is the gas they receive, the block reward, but then there is also uncles to account for.
The easiest way to do this may be to get the miner address from eth_getBlockByNumber than to do an eth_getBalance on that address for that block and the previous block, however this isn’t perfect because you would have to account for any transfers that address made, and additionally, the miner can assign the reward to any address not necessarily the miner address.
Thanks for the info Mike. yeah it’s a bit tricky. My solution for now is I’m just giving 2 ETH to the miner. I guess when the mining reward changes I will change that value in the backend.