diff --git a/x/callback/client/cli/query.go b/x/callback/client/cli/query.go
new file mode 100644
index 00000000..c8e07922
--- /dev/null
+++ b/x/callback/client/cli/query.go
@@ -0,0 +1,10 @@
+package cli
+
+import (
+	"github.com/spf13/cobra"
+)
+
+// GetQueryCmd builds query command group for the module.
+func GetQueryCmd() *cobra.Command {
+	panic("unimplemented 👻")
+}
diff --git a/x/callback/client/cli/tx.go b/x/callback/client/cli/tx.go
new file mode 100644
index 00000000..486ec8d1
--- /dev/null
+++ b/x/callback/client/cli/tx.go
@@ -0,0 +1,10 @@
+package cli
+
+import (
+	"github.com/spf13/cobra"
+)
+
+// GetTxCmd builds tx command group for the module.
+func GetTxCmd() *cobra.Command {
+	panic("unimplemented 👻")
+}
diff --git a/x/callback/genesis.go b/x/callback/genesis.go
new file mode 100644
index 00000000..edb79e41
--- /dev/null
+++ b/x/callback/genesis.go
@@ -0,0 +1,18 @@
+package callback
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	"github.com/archway-network/archway/x/callback/keeper"
+	"github.com/archway-network/archway/x/callback/types"
+)
+
+// InitGenesis initializes the module genesis state.
+func InitGenesis(ctx sdk.Context, k keeper.Keeper, genState types.GenesisState) {
+	panic("unimplemented 👻")
+}
+
+// ExportGenesis exports the module genesis for the current block.
+func ExportGenesis(ctx sdk.Context, k keeper.Keeper) *types.GenesisState {
+	panic("unimplemented 👻")
+}
diff --git a/x/callback/keeper/callback.go b/x/callback/keeper/callback.go
new file mode 100644
index 00000000..b55569d4
--- /dev/null
+++ b/x/callback/keeper/callback.go
@@ -0,0 +1 @@
+package keeper
diff --git a/x/callback/keeper/grpc_query.go b/x/callback/keeper/grpc_query.go
new file mode 100644
index 00000000..f2361d5a
--- /dev/null
+++ b/x/callback/keeper/grpc_query.go
@@ -0,0 +1,36 @@
+package keeper
+
+import (
+	"context"
+
+	"github.com/archway-network/archway/x/callback/types"
+)
+
+var _ types.QueryServer = &QueryServer{}
+
+// QueryServer implements the module gRPC query service.
+type QueryServer struct {
+	keeper Keeper
+}
+
+// NewQueryServer creates a new gRPC query server.
+func NewQueryServer(keeper Keeper) *QueryServer {
+	return &QueryServer{
+		keeper: keeper,
+	}
+}
+
+// Callbacks implements types.QueryServer.
+func (*QueryServer) Callbacks(context.Context, *types.QueryCallbacksRequest) (*types.QueryCallbacksResponse, error) {
+	panic("unimplemented 👻")
+}
+
+// EstimateCallbackFees implements types.QueryServer.
+func (*QueryServer) EstimateCallbackFees(context.Context, *types.QueryEstimateCallbackFeesRequest) (*types.QueryEstimateCallbackFeesResponse, error) {
+	panic("unimplemented 👻")
+}
+
+// Params implements types.QueryServer.
+func (*QueryServer) Params(context.Context, *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
+	panic("unimplemented 👻")
+}
diff --git a/x/callback/keeper/keeper.go b/x/callback/keeper/keeper.go
new file mode 100644
index 00000000..d27da287
--- /dev/null
+++ b/x/callback/keeper/keeper.go
@@ -0,0 +1,29 @@
+package keeper
+
+import (
+	"github.com/cometbft/cometbft/libs/log"
+	"github.com/cosmos/cosmos-sdk/codec"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	paramTypes "github.com/cosmos/cosmos-sdk/x/params/types"
+
+	"github.com/archway-network/archway/x/callback/types"
+)
+
+// Keeper provides module state operations.
+type Keeper struct {
+	cdc        codec.Codec
+	paramStore paramTypes.Subspace
+}
+
+// NewKeeper creates a new Keeper instance.
+func NewKeeper(cdc codec.Codec, ps paramTypes.Subspace) Keeper {
+	return Keeper{
+		cdc:        cdc,
+		paramStore: ps,
+	}
+}
+
+// Logger returns a module-specific logger.
+func (k Keeper) Logger(ctx sdk.Context) log.Logger {
+	return ctx.Logger().With("module", "x/"+types.ModuleName)
+}
diff --git a/x/callback/keeper/msg_server.go b/x/callback/keeper/msg_server.go
new file mode 100644
index 00000000..3ecdc916
--- /dev/null
+++ b/x/callback/keeper/msg_server.go
@@ -0,0 +1,36 @@
+package keeper
+
+import (
+	"context"
+
+	"github.com/archway-network/archway/x/callback/types"
+)
+
+var _ types.MsgServer = (*MsgServer)(nil)
+
+// MsgServer implements the module gRPC messaging service.
+type MsgServer struct {
+	keeper Keeper
+}
+
+// NewMsgServer creates a new gRPC messaging server.
+func NewMsgServer(keeper Keeper) *MsgServer {
+	return &MsgServer{
+		keeper: keeper,
+	}
+}
+
+// CancelCallback implements types.MsgServer.
+func (*MsgServer) CancelCallback(context.Context, *types.MsgCancelCallback) (*types.MsgCancelCallbackResponse, error) {
+	panic("unimplemented 👻")
+}
+
+// RequestCallback implements types.MsgServer.
+func (*MsgServer) RequestCallback(context.Context, *types.MsgRequestCallback) (*types.MsgRequestCallbackResponse, error) {
+	panic("unimplemented 👻")
+}
+
+// UpdateParams implements types.MsgServer.
+func (*MsgServer) UpdateParams(context.Context, *types.MsgUpdateParams) (*types.MsgUpdateParamsResponse, error) {
+	panic("unimplemented 👻")
+}
diff --git a/x/callback/keeper/params.go b/x/callback/keeper/params.go
new file mode 100644
index 00000000..b55569d4
--- /dev/null
+++ b/x/callback/keeper/params.go
@@ -0,0 +1 @@
+package keeper
diff --git a/x/callback/module.go b/x/callback/module.go
new file mode 100644
index 00000000..97eefea6
--- /dev/null
+++ b/x/callback/module.go
@@ -0,0 +1,131 @@
+package callback
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	abci "github.com/cometbft/cometbft/abci/types"
+	"github.com/cosmos/cosmos-sdk/client"
+	"github.com/cosmos/cosmos-sdk/codec"
+	codecTypes "github.com/cosmos/cosmos-sdk/codec/types"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	"github.com/grpc-ecosystem/grpc-gateway/runtime"
+	"github.com/spf13/cobra"
+
+	"github.com/archway-network/archway/x/callback/client/cli"
+	"github.com/archway-network/archway/x/callback/keeper"
+	"github.com/archway-network/archway/x/callback/types"
+)
+
+var (
+	_ module.AppModuleBasic = AppModuleBasic{}
+	_ module.AppModule      = AppModule{}
+)
+
+// AppModuleBasic defines the basic application module for this module.
+type AppModuleBasic struct {
+	cdc codec.Codec
+}
+
+// Name returns the module's name.
+func (a AppModuleBasic) Name() string {
+	return types.ModuleName
+}
+
+// RegisterLegacyAminoCodec registers the module's types on the given LegacyAmino codec.
+func (a AppModuleBasic) RegisterLegacyAminoCodec(amino *codec.LegacyAmino) {
+	types.RegisterLegacyAminoCodec(amino)
+}
+
+// RegisterInterfaces registers the module's interface types.
+func (a AppModuleBasic) RegisterInterfaces(registry codecTypes.InterfaceRegistry) {
+	types.RegisterInterfaces(registry)
+}
+
+// DefaultGenesis returns default genesis state as raw bytes for the module.
+func (a AppModuleBasic) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
+	return cdc.MustMarshalJSON(types.DefaultGenesis())
+}
+
+// ValidateGenesis performs genesis state validation for the module.
+func (a AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, _ client.TxEncodingConfig, bz json.RawMessage) error {
+	var state types.GenesisState
+	if err := cdc.UnmarshalJSON(bz, &state); err != nil {
+		return fmt.Errorf("failed to unmarshal x/%s genesis state: %w", types.ModuleName, err)
+	}
+
+	return state.Validate()
+}
+
+// RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the module.
+func (a AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, serveMux *runtime.ServeMux) {
+	if err := types.RegisterQueryHandlerClient(context.Background(), serveMux, types.NewQueryClient(clientCtx)); err != nil {
+		panic(fmt.Errorf("registering query handler for x/%s: %w", types.ModuleName, err))
+	}
+}
+
+// GetTxCmd returns the root tx command for the module.
+func (a AppModuleBasic) GetTxCmd() *cobra.Command {
+	return cli.GetTxCmd()
+}
+
+// GetQueryCmd returns no root query command for the module.
+func (a AppModuleBasic) GetQueryCmd() *cobra.Command {
+	return cli.GetQueryCmd()
+}
+
+// AppModule implements an application module for this module.
+type AppModule struct {
+	AppModuleBasic
+
+	keeper keeper.Keeper
+}
+
+// NewAppModule creates a new AppModule object.
+func NewAppModule(cdc codec.Codec, keeper keeper.Keeper) AppModule {
+	return AppModule{
+		AppModuleBasic: AppModuleBasic{cdc: cdc},
+		keeper:         keeper,
+	}
+}
+
+// RegisterInvariants registers the module invariants.
+func (a AppModule) RegisterInvariants(ir sdk.InvariantRegistry) {
+}
+
+// RegisterServices registers the module services.
+func (a AppModule) RegisterServices(cfg module.Configurator) {
+	types.RegisterQueryServer(cfg.QueryServer(), keeper.NewQueryServer(a.keeper))
+	types.RegisterMsgServer(cfg.MsgServer(), keeper.NewMsgServer(a.keeper))
+}
+
+// InitGenesis performs genesis initialization for the module. It returns no validator updates.
+func (a AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, bz json.RawMessage) []abci.ValidatorUpdate {
+	var genesisState types.GenesisState
+	cdc.MustUnmarshalJSON(bz, &genesisState)
+
+	InitGenesis(ctx, a.keeper, genesisState)
+
+	return []abci.ValidatorUpdate{}
+}
+
+// ExportGenesis returns the exported genesis state as raw bytes for the module.
+func (a AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec) json.RawMessage {
+	state := ExportGenesis(ctx, a.keeper)
+	return cdc.MustMarshalJSON(state)
+}
+
+// ConsensusVersion implements AppModule/ConsensusVersion.
+func (a AppModule) ConsensusVersion() uint64 {
+	return 1
+}
+
+// BeginBlock returns the begin blocker for the module.
+func (a AppModule) BeginBlock(ctx sdk.Context, block abci.RequestBeginBlock) {}
+
+// EndBlock returns the end blocker for the module. It returns no validator updates.
+func (a AppModule) EndBlock(ctx sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate {
+	return []abci.ValidatorUpdate{}
+}
diff --git a/x/callback/types/codec.go b/x/callback/types/codec.go
new file mode 100644
index 00000000..1100c0a5
--- /dev/null
+++ b/x/callback/types/codec.go
@@ -0,0 +1,29 @@
+package types
+
+import (
+	"github.com/cosmos/cosmos-sdk/codec"
+	"github.com/cosmos/cosmos-sdk/codec/types"
+	cryptoCodec "github.com/cosmos/cosmos-sdk/crypto/codec"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+// RegisterLegacyAminoCodec registers the necessary interfaces and concrete types on the provided LegacyAmino codec.
+// These types are used for Amino JSON serialization.
+func RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
+}
+
+// RegisterInterfaces registers interfaces types with the interface registry.
+func RegisterInterfaces(registry types.InterfaceRegistry) {
+}
+
+var (
+	ModuleCdc = codec.NewAminoCodec(amino)
+	amino     = codec.NewLegacyAmino()
+)
+
+func init() {
+	RegisterLegacyAminoCodec(amino)
+	cryptoCodec.RegisterCrypto(amino)
+	sdk.RegisterLegacyAminoCodec(amino)
+	amino.Seal()
+}
diff --git a/x/callback/types/errors.go b/x/callback/types/errors.go
new file mode 100644
index 00000000..3be97671
--- /dev/null
+++ b/x/callback/types/errors.go
@@ -0,0 +1,8 @@
+package types
+
+import errorsmod "cosmossdk.io/errors"
+
+var (
+	DefaultCodespace = ModuleName
+	ErrInternal      = errorsmod.Register(DefaultCodespace, 0, "internal error") // smth went wrong
+)
diff --git a/x/callback/types/expected_keepers.go b/x/callback/types/expected_keepers.go
new file mode 100644
index 00000000..ab1254f4
--- /dev/null
+++ b/x/callback/types/expected_keepers.go
@@ -0,0 +1 @@
+package types
diff --git a/x/callback/types/genesis.go b/x/callback/types/genesis.go
new file mode 100644
index 00000000..079f389b
--- /dev/null
+++ b/x/callback/types/genesis.go
@@ -0,0 +1,18 @@
+package types
+
+// NewGenesisState creates a new GenesisState object.
+func NewGenesisState(
+	params Params,
+) *GenesisState {
+	panic("unimplemented 👻")
+}
+
+// DefaultGenesisState returns a default genesis state.
+func DefaultGenesis() *GenesisState {
+	panic("unimplemented 👻")
+}
+
+// Validate perform object fields validation.
+func (m GenesisState) Validate() error {
+	panic("unimplemented 👻")
+}
diff --git a/x/callback/types/keys.go b/x/callback/types/keys.go
new file mode 100644
index 00000000..c9ec4391
--- /dev/null
+++ b/x/callback/types/keys.go
@@ -0,0 +1,10 @@
+package types
+
+const (
+	// ModuleName is the module name.
+	ModuleName = "callback"
+	// StoreKey is the module KV storage prefix key.
+	StoreKey = ModuleName
+	// QuerierRoute is the querier route for the module.
+	QuerierRoute = ModuleName
+)
diff --git a/x/callback/types/params.go b/x/callback/types/params.go
new file mode 100644
index 00000000..e56307b0
--- /dev/null
+++ b/x/callback/types/params.go
@@ -0,0 +1,20 @@
+package types
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+// NewParams creates a new Params instance.
+func NewParams(inflationRewardsRatio, txFeeRebateRatio sdk.Dec, maxwithdrawRecords uint64) Params {
+	panic("unimplemented 👻")
+}
+
+// DefaultParams returns a default set of parameters.
+func DefaultParams() Params {
+	panic("unimplemented 👻")
+}
+
+// Validate perform object fields validation.
+func (m Params) Validate() error {
+	panic("unimplemented 👻")
+}
diff --git a/x/callback/types/types.go b/x/callback/types/types.go
new file mode 100644
index 00000000..ab1254f4
--- /dev/null
+++ b/x/callback/types/types.go
@@ -0,0 +1 @@
+package types