diff --git a/x/ibchooks/types/types.go b/x/ibchooks/types/types.go
index df766920c8..21bb01f324 100644
--- a/x/ibchooks/types/types.go
+++ b/x/ibchooks/types/types.go
@@ -2,6 +2,7 @@ package types
 
 import (
 	"encoding/json"
+	"strings"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	channeltypes "github.com/cosmos/ibc-go/v6/modules/core/04-channel/types"
@@ -86,13 +87,13 @@ func UnmarshalIBCAck(bz []byte) (*IBCAck, error) {
 }
 
 type IbcAck struct {
-	Channel  string `json:"channel"`
-	Sequence uint64 `json:"sequence"`
-	Ack      string `json:"ack"`
-	Success  string `json:"success"`
+	Channel  string    `json:"channel"`
+	Sequence uint64    `json:"sequence"`
+	Ack      JsonBytes `json:"ack"`
+	Success  bool      `json:"success"`
 }
 
-type IbcLifecycleCompleteSuccess struct {
+type IbcLifecycleCompleteAck struct {
 	IbcAck IbcAck `json:"ibc_ack"`
 }
 
@@ -101,10 +102,14 @@ type IbcTimeout struct {
 	Sequence uint64 `json:"sequence"`
 }
 
-type IbcLifecycleComplete struct {
+type IbcLifecycleCompleteTimeout struct {
 	IbcTimeout IbcTimeout `json:"ibc_timeout"`
 }
 
+type IbcLifecycleComplete struct {
+	IbcLifecycleComplete interface{} `json:"ibc_lifecycle_complete"`
+}
+
 type MarkerMemo struct {
 	Marker MarkerPayload `json:"marker"`
 }
@@ -122,3 +127,35 @@ func NewMarkerMemo(transferAuthAddrs []sdk.AccAddress) MarkerMemo {
 		TransferAuth: addresses,
 	}}
 }
+
+func NewIbcLifecycleCompleteAck(sourceChannel string, sequence uint64, ackAsJSON []byte, success bool) IbcLifecycleComplete {
+	sourceChannel = strings.ReplaceAll(sourceChannel, "\"", "")
+	ibcLifecycleCompleteAck := IbcLifecycleCompleteAck{
+		IbcAck: IbcAck{
+			Channel:  sourceChannel,
+			Sequence: sequence,
+			Ack:      ackAsJSON,
+			Success:  success,
+		},
+	}
+	return IbcLifecycleComplete{IbcLifecycleComplete: ibcLifecycleCompleteAck}
+}
+
+func NewIbcLifecycleCompleteTimeout(sourceChannel string, sequence uint64) IbcLifecycleComplete {
+	ibcLifecycleCompleteAck := IbcLifecycleCompleteTimeout{
+		IbcTimeout: IbcTimeout{
+			Channel:  sourceChannel,
+			Sequence: sequence,
+		},
+	}
+	return IbcLifecycleComplete{IbcLifecycleComplete: ibcLifecycleCompleteAck}
+}
+
+type JsonBytes []byte
+
+func (jb JsonBytes) MarshalJSON() ([]byte, error) {
+	if len(jb) == 0 {
+		return []byte("{}"), nil
+	}
+	return jb, nil
+}
diff --git a/x/ibchooks/types/types_test.go b/x/ibchooks/types/types_test.go
new file mode 100644
index 0000000000..afc3be8f10
--- /dev/null
+++ b/x/ibchooks/types/types_test.go
@@ -0,0 +1,35 @@
+package types
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+)
+
+type IbcHooksTypesTestSuite struct {
+	suite.Suite
+}
+
+func (s *IbcHooksTypesTestSuite) SetupTest() {}
+
+func TestSITestSuite(t *testing.T) {
+	suite.Run(t, new(IbcHooksTypesTestSuite))
+}
+
+func (s *IbcHooksTypesTestSuite) TestIbcLifecycleCompleteAckJsonSerialization() {
+	ack := RequestAckI{SourceChannel: "channel", PacketSequence: 100}
+	ackBz, err := json.Marshal(ack)
+	s.Require().NoError(err)
+	ibcLifecycleCompleteAck := NewIbcLifecycleCompleteAck("channel-1", 100, ackBz, true)
+	sudoMsg, err := json.Marshal(ibcLifecycleCompleteAck)
+	s.Require().NoError(err)
+	s.Require().Equal(`{"ibc_lifecycle_complete":{"ibc_ack":{"channel":"channel-1","sequence":100,"ack":{"packet_sequence":100,"source_channel":"channel"},"success":true}}}`, string(sudoMsg))
+}
+
+func (s *IbcHooksTypesTestSuite) TestIbcLifecycleCompleteTimeoutJsonSerialization() {
+	ibcLifecycleCompleteAck := NewIbcLifecycleCompleteTimeout("channel-1", 100)
+	sudoMsg, err := json.Marshal(ibcLifecycleCompleteAck)
+	s.Require().NoError(err)
+	s.Require().Equal(`{"ibc_lifecycle_complete":{"ibc_timeout":{"channel":"channel-1","sequence":100}}}`, string(sudoMsg))
+}
diff --git a/x/ibchooks/wasm_hook.go b/x/ibchooks/wasm_hook.go
index 2c6e5cd9a3..1bff573930 100644
--- a/x/ibchooks/wasm_hook.go
+++ b/x/ibchooks/wasm_hook.go
@@ -3,7 +3,6 @@ package ibchooks
 import (
 	"encoding/json"
 	"fmt"
-	"strings"
 
 	wasmkeeper "github.com/CosmWasm/wasmd/x/wasm/keeper"
 	wasmtypes "github.com/CosmWasm/wasmd/x/wasm/types"
@@ -322,10 +321,7 @@ func (h WasmHooks) OnAcknowledgementPacketOverride(im IBCMiddleware, ctx sdktype
 		return sdkerrors.Wrap(err, "Ack callback error")
 	}
 
-	success := "false"
-	if !IsJSONAckError(acknowledgement) {
-		success = "true"
-	}
+	success := !IsJSONAckError(acknowledgement)
 
 	// Notify the sender that the ack has been received
 	ackAsJSON, err := json.Marshal(acknowledgement)
@@ -333,17 +329,7 @@ func (h WasmHooks) OnAcknowledgementPacketOverride(im IBCMiddleware, ctx sdktype
 		return err
 	}
 
-	// This should never match anything, but we want to satisfy the github code scanning flag.
-	sanitizedSourceChannel := strings.ReplaceAll(packet.SourceChannel, "\"", "")
-
-	ibcLifecycleComplete := types.IbcLifecycleCompleteSuccess{
-		IbcAck: types.IbcAck{
-			Channel:  sanitizedSourceChannel,
-			Sequence: packet.Sequence,
-			Ack:      string(ackAsJSON),
-			Success:  success,
-		},
-	}
+	ibcLifecycleComplete := types.NewIbcLifecycleCompleteAck(packet.SourceChannel, packet.Sequence, ackAsJSON, success)
 	sudoMsg, err := json.Marshal(ibcLifecycleComplete)
 	if err != nil {
 		return sdkerrors.Wrap(err, "Ack callback error")
@@ -369,30 +355,25 @@ func (h WasmHooks) OnTimeoutPacketOverride(im IBCMiddleware, ctx sdktypes.Contex
 	}
 
 	if !h.ProperlyConfigured() {
-		// Not configured. Return from the underlying implementation
 		return nil
 	}
 
 	contract := h.ibcHooksKeeper.GetPacketCallback(ctx, packet.GetSourceChannel(), packet.GetSequence())
 	if contract == "" {
-		// No callback configured
 		return nil
 	}
 
 	contractAddr, err := sdktypes.AccAddressFromBech32(contract)
 	if err != nil {
-		return sdkerrors.Wrap(err, "Timeout callback error") // The callback configured is not a bech32. Error out
+		return sdkerrors.Wrap(err, "Timeout callback error")
 	}
 
-	sudoMsg := IbcLifecycleComplete{
-		IbcTimeout: IbcTimeout{
-			Channel:  packet.SourceChannel,
-			Sequence: packet.Sequence,
-		},
+	sudoMsg := types.NewIbcLifecycleCompleteTimeout(packet.SourceChannel, packet.Sequence)
+	jsonData, err := json.Marshal(sudoMsg)
+	if err != nil {
+		return sdkerrors.Wrap(err, "Timeout callback error")
 	}
 
-	// TODO do something with error
-	jsonData, _ := json.Marshal(sudoMsg)
 	_, err = h.ContractKeeper.Sudo(ctx, contractAddr, jsonData)
 	if err != nil {
 		// error processing the callback. This could be because the contract doesn't implement the message type to