feemarket: update base fee in BeginBlock (#822)

* Update base fee in begin blocker

Closes: #820

* changelog

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

x/feemarket/keeper/abci.go

@@ -9,10 +9,8 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
 
-// EndBlock also retrieves the bloom filter value from the transient store and commits it to the
-// KVStore. The EVM end block logic doesn't update the validator set, thus it returns
-// an empty slice.
-func (k *Keeper) EndBlock(ctx sdk.Context, req abci.RequestEndBlock) {
+// BeginBlock updates base fee
+func (k *Keeper) BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock) {
 	baseFee := k.CalculateBaseFee(ctx)
 
 	// return immediately if base fee is nil
@@ -29,7 +27,12 @@ func (k *Keeper) EndBlock(ctx sdk.Context, req abci.RequestEndBlock) {
 			sdk.NewAttribute(types.AttributeKeyBaseFee, baseFee.String()),
 		),
 	})
+}
 
+// EndBlock update block gas used.
+// The EVM end block logic doesn't update the validator set, thus it returns
+// an empty slice.
+func (k *Keeper) EndBlock(ctx sdk.Context, req abci.RequestEndBlock) {
 	if ctx.BlockGasMeter() == nil {
 		k.Logger(ctx).Error("block gas meter is nil when setting block gas used")
 		return

x/feemarket/keeper/eip1559.go

@@ -10,7 +10,7 @@ import (
 )
 
 // CalculateBaseFee calculates the base fee for the current block. This is only calculated once per
-// block during EndBlock. If the NoBaseFee parameter is enabled or below activation height, this function returns nil.
+// block during BeginBlock. If the NoBaseFee parameter is enabled or below activation height, this function returns nil.
 // NOTE: This code is inspired from the go-ethereum EIP1559 implementation and adapted to Cosmos SDK-based
 // chains. For the canonical code refer to: https://github.com/ethereum/go-ethereum/blob/master/consensus/misc/eip1559.go
 func (k Keeper) CalculateBaseFee(ctx sdk.Context) *big.Int {

x/feemarket/module.go

@@ -135,7 +135,9 @@ func (am AppModule) LegacyQuerierHandler(legacyQuerierCdc *codec.LegacyAmino) sd
 }
 
 // BeginBlock returns the begin block for the fee market module.
-func (am AppModule) BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock) {}
+func (am AppModule) BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock) {
+	am.keeper.BeginBlock(ctx, req)
+}
 
 // EndBlock returns the end blocker for the fee market module. It returns no validator
 // updates.