feat: keeper state api

x/feemarket/keeper/keeper.go

@@ -45,12 +45,31 @@ func (k *Keeper) GetAuthority() string {
 
 // GetState returns the feemarket module's state.
 func (k *Keeper) GetState(ctx sdk.Context) (types.State, error) {
-	panic("TODO")
+	store := ctx.KVStore(k.storeKey)
+
+	key := types.KeyState
+	bz := store.Get(key)
+
+	state := types.State{}
+	if err := state.Unmarshal(bz); err != nil {
+		return types.State{}, err
+	}
+
+	return state, nil
 }
 
 // SetState sets the feemarket module's state.
 func (k *Keeper) SetState(ctx sdk.Context, state types.State) error {
-	panic("TODO")
+	store := ctx.KVStore(k.storeKey)
+
+	bz, err := state.Marshal()
+	if err != nil {
+		return err
+	}
+
+	store.Set(types.KeyState, bz)
+
+	return nil
 }
 
 // GetParams returns the feemarket module's parameters.

x/feemarket/keeper/keeper_test.go

@@ -53,3 +53,36 @@ func (s *KeeperTestSuite) SetupTest() {
 	s.msgServer = keeper.NewMsgServer(*s.feemarketKeeper)
 	s.queryServer = keeper.NewQueryServer(*s.feemarketKeeper)
 }
+
+func (s *KeeperTestSuite) TestState() {
+	s.Run("get state with no state set", func() {
+		gotState, err := s.feemarketKeeper.GetState(s.ctx)
+		s.Require().NoError(err)
+
+		s.Require().Equal(types.State{}, gotState)
+	})
+
+	s.Run("set and get default eip1559 state", func() {
+		state := types.DefaultState()
+
+		err := s.feemarketKeeper.SetState(s.ctx, state)
+		s.Require().NoError(err)
+
+		gotState, err := s.feemarketKeeper.GetState(s.ctx)
+		s.Require().NoError(err)
+
+		s.Require().EqualValues(state, gotState)
+	})
+
+	s.Run("set and get aimd eip1559 state", func() {
+		state := types.DefaultAIMDState()
+
+		err := s.feemarketKeeper.SetState(s.ctx, state)
+		s.Require().NoError(err)
+
+		gotState, err := s.feemarketKeeper.GetState(s.ctx)
+		s.Require().NoError(err)
+
+		s.Require().Equal(state, gotState)
+	})
+}