Changes miningReward method to calculate the reward for block zero correctly

Author: thepabloaguilar

ethereum/client.go

@@ -1067,14 +1067,10 @@ func (ec *Client) populateTransaction(
 // for a given block height.
 //
 // Source:
-// https://github.com/ethereum/go-ethereum/master/consensus/ethash/consensus.go#L619-L645
+// https://github.com/ethereum/go-ethereum/blob/master/consensus/ethash/consensus.go#L646-L653
 func (ec *Client) miningReward(
 	currentBlock *big.Int,
 ) int64 {
-	if currentBlock.Int64() == int64(0) {
-		return big.NewInt(0).Int64()
-	}
-
 	blockReward := ethash.FrontierBlockReward.Int64()
 	if ec.p.IsByzantium(currentBlock) {
 		blockReward = ethash.ByzantiumBlockReward.Int64()