Apply suggestions from code review

Co-Authored-By: Łukasz Magiera <magik6k@users.noreply.github.com>

build/params.go

@@ -35,8 +35,10 @@ var MiningRewardInitialAttoFilBytes = []byte{0x8, 0x57, 0x31, 0x68, 0x6e, 0x4f,
 const FilecoinPrecision = 1000000000000000000
 
 // six years
+// Blocks
 const HalvingPeriodBlocks = 6 * 365 * 24 * 60 * 2
 
+// Blocks
 const AdjustmentPeriod = 7 * 24 * 60 * 2
 
 // TODO: Move other important consts here

chain/vm/vm.go

@@ -633,12 +633,12 @@ func DepositFunds(act *types.Actor, amt types.BigInt) {
 	act.Balance = types.BigAdd(act.Balance, amt)
 }
 
-var IV = types.BigInt{big.NewInt(0).SetBytes(build.MiningRewardInitialAttoFilBytes)}
+var initialReward = types.BigInt{big.NewInt(0).SetBytes(build.MiningRewardInitialAttoFilBytes)}
 var miningRewardTotal = types.FromFil(build.MiningRewardTotal)
 
 // MiningReward returns correct mining reward
 //   coffer is amount of FIL in NetworkAddress
-func MiningReward(coffer types.BigInt) types.BigInt {
+func MiningReward(remainingReward types.BigInt) types.BigInt {
 	ci := big.NewInt(0).Set(coffer.Int)
 	res := ci.Mul(ci, IV.Int)
 	res = res.Div(res, miningRewardTotal.Int)