Modules depinject-ready

Pre-requisite Readings

• Depinject Documentation

depinject is used to wire any module in app.go. All core modules are already configured to support dependency injection.

To work with depinject a module must define its configuration and requirements so that depinject can provide the right dependencies.

In brief, as a module developer, the following steps are required:

1. Define the module configuration using Protobuf
2. Define the module dependencies in x/{moduleName}/module.go

A chain developer can then use the module by following these two steps:

1. Configure the module in app_config.go or app.yaml
2. Inject the module in app.go

Module Configuration

The module available configuration is defined in a Protobuf file, located at {moduleName}/module/v1/module.proto.

syntax = "proto3";

package cosmos.group.module.v1;

import "cosmos/app/v1alpha1/module.proto";
import "gogoproto/gogo.proto";
import "google/protobuf/duration.proto";
import "amino/amino.proto";

// Module is the config object of the group module.
message Module {
  option (cosmos.app.v1alpha1.module) = {
    go_import: "github.com/cosmos/cosmos-sdk/x/group"
  };

  // max_execution_period defines the max duration after a proposal's voting period ends that members can send a MsgExec
  // to execute the proposal.
  google.protobuf.Duration max_execution_period = 1
      [(gogoproto.stdduration) = true, (gogoproto.nullable) = false, (amino.dont_omitempty) = true];

  // max_metadata_len defines the max length of the metadata bytes field for various entities within the group module.
  // Defaults to 255 if not explicitly set.
  uint64 max_metadata_len = 2;
}

• go_import must point to the Go package of the custom module.

• Message fields define the module configuration. That configuration can be set in the app_config.go / app.yaml file for a chain developer to configure the module.
  Taking group as example, a chain developer is able to decide, thanks to uint64 max_metadata_len, what the maximum metadata length allowed for a group proposal is.

  package simapp
  
  import (
      
  	"time"
      "google.golang.org/protobuf/types/known/durationpb"
  
  	runtimev1alpha1 "cosmossdk.io/api/cosmos/app/runtime/v1alpha1"
  	appv1alpha1 "cosmossdk.io/api/cosmos/app/v1alpha1"
  	authmodulev1 "cosmossdk.io/api/cosmos/auth/module/v1"
  	authzmodulev1 "cosmossdk.io/api/cosmos/authz/module/v1"
  	bankmodulev1 "cosmossdk.io/api/cosmos/bank/module/v1"
  	circuitmodulev1 "cosmossdk.io/api/cosmos/circuit/module/v1"
  	consensusmodulev1 "cosmossdk.io/api/cosmos/consensus/module/v1"
  	crisismodulev1 "cosmossdk.io/api/cosmos/crisis/module/v1"
  	distrmodulev1 "cosmossdk.io/api/cosmos/distribution/module/v1"
  	evidencemodulev1 "cosmossdk.io/api/cosmos/evidence/module/v1"
  	feegrantmodulev1 "cosmossdk.io/api/cosmos/feegrant/module/v1"
  	genutilmodulev1 "cosmossdk.io/api/cosmos/genutil/module/v1"
  	govmodulev1 "cosmossdk.io/api/cosmos/gov/module/v1"
  	groupmodulev1 "cosmossdk.io/api/cosmos/group/module/v1"
  	mintmodulev1 "cosmossdk.io/api/cosmos/mint/module/v1"
  	nftmodulev1 "cosmossdk.io/api/cosmos/nft/module/v1"
  	paramsmodulev1 "cosmossdk.io/api/cosmos/params/module/v1"
  	slashingmodulev1 "cosmossdk.io/api/cosmos/slashing/module/v1"
  	stakingmodulev1 "cosmossdk.io/api/cosmos/staking/module/v1"
  	txconfigv1 "cosmossdk.io/api/cosmos/tx/config/v1"
  	upgrademodulev1 "cosmossdk.io/api/cosmos/upgrade/module/v1"
  	vestingmodulev1 "cosmossdk.io/api/cosmos/vesting/module/v1"
      "cosmossdk.io/depinject"
  
  	_ "cosmossdk.io/x/circuit"                        / import for side-effects
  	_ "cosmossdk.io/x/evidence"                       / import for side-effects
  	_ "cosmossdk.io/x/feegrant/module"                / import for side-effects
  	_ "cosmossdk.io/x/nft/module"                     / import for side-effects
  	_ "cosmossdk.io/x/upgrade"                        / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/auth/tx/config" / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/auth/vesting"   / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/authz/module"   / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/bank"           / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/consensus"      / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/crisis"         / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/distribution"   / import for side-effects
  	"github.com/cosmos/cosmos-sdk/x/genutil"
      "github.com/cosmos/cosmos-sdk/x/gov"
  	_ "github.com/cosmos/cosmos-sdk/x/group/module" / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/mint"         / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/params"       / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/slashing"     / import for side-effects
  	_ "github.com/cosmos/cosmos-sdk/x/staking"      / import for side-effects
  
  	"cosmossdk.io/core/appconfig"
  	circuittypes "cosmossdk.io/x/circuit/types"
  	evidencetypes "cosmossdk.io/x/evidence/types"
      "cosmossdk.io/x/feegrant"
      "cosmossdk.io/x/nft"
  	upgradetypes "cosmossdk.io/x/upgrade/types"
      "github.com/cosmos/cosmos-sdk/runtime"
      "github.com/cosmos/cosmos-sdk/types/module"
  	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
  	vestingtypes "github.com/cosmos/cosmos-sdk/x/auth/vesting/types"
      "github.com/cosmos/cosmos-sdk/x/authz"
  	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
  	consensustypes "github.com/cosmos/cosmos-sdk/x/consensus/types"
  	crisistypes "github.com/cosmos/cosmos-sdk/x/crisis/types"
  	distrtypes "github.com/cosmos/cosmos-sdk/x/distribution/types"
  	genutiltypes "github.com/cosmos/cosmos-sdk/x/genutil/types"
  	govclient "github.com/cosmos/cosmos-sdk/x/gov/client"
  	govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
      "github.com/cosmos/cosmos-sdk/x/group"
  	minttypes "github.com/cosmos/cosmos-sdk/x/mint/types"
  	paramsclient "github.com/cosmos/cosmos-sdk/x/params/client"
  	paramstypes "github.com/cosmos/cosmos-sdk/x/params/types"
  	slashingtypes "github.com/cosmos/cosmos-sdk/x/slashing/types"
  	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
  )
  
  var (
  	/ module account permissions
  	moduleAccPerms = []*authmodulev1.ModuleAccountPermission{
  		{
      Account: authtypes.FeeCollectorName
  },
  		{
      Account: distrtypes.ModuleName
  },
  		{
      Account: minttypes.ModuleName,
      Permissions: []string{
      authtypes.Minter
  }},
  		{
      Account: stakingtypes.BondedPoolName,
      Permissions: []string{
      authtypes.Burner, stakingtypes.ModuleName
  }},
  		{
      Account: stakingtypes.NotBondedPoolName,
      Permissions: []string{
      authtypes.Burner, stakingtypes.ModuleName
  }},
  		{
      Account: govtypes.ModuleName,
      Permissions: []string{
      authtypes.Burner
  }},
  		{
      Account: nft.ModuleName
  },
  }
  
  	/ blocked account addresses
  	blockAccAddrs = []string{
      authtypes.FeeCollectorName,
  		distrtypes.ModuleName,
  		minttypes.ModuleName,
  		stakingtypes.BondedPoolName,
  		stakingtypes.NotBondedPoolName,
  		nft.ModuleName,
  		/ We allow the following module accounts to receive funds:
  		/ govtypes.ModuleName
  }
  
  	/ application configuration (used by depinject)
  
  AppConfig = depinject.Configs(appconfig.Compose(&appv1alpha1.Config{
      Modules: []*appv1alpha1.ModuleConfig{
  			{
      Name: runtime.ModuleName,
      Config: appconfig.WrapAny(&runtimev1alpha1.Module{
      AppName: "SimApp",
  					/ During begin block slashing happens after distr.BeginBlocker so that
  					/ there is nothing left over in the validator fee pool, so as to keep the
  					/ CanWithdrawInvariant invariant.
  					/ NOTE: staking module is required if HistoricalEntries param > 0
  					BeginBlockers: []string{
      upgradetypes.ModuleName,
  						minttypes.ModuleName,
  						distrtypes.ModuleName,
  						slashingtypes.ModuleName,
  						evidencetypes.ModuleName,
  						stakingtypes.ModuleName,
  						genutiltypes.ModuleName,
  						authz.ModuleName,
  },
      EndBlockers: []string{
      crisistypes.ModuleName,
  						govtypes.ModuleName,
  						stakingtypes.ModuleName,
  						genutiltypes.ModuleName,
  						feegrant.ModuleName,
  						group.ModuleName,
  },
      OverrideStoreKeys: []*runtimev1alpha1.StoreKeyConfig{
  						{
      ModuleName: authtypes.ModuleName,
      KvStoreKey: "acc",
  },
  },
  					/ NOTE: The genutils module must occur after staking so that pools are
  					/ properly initialized with tokens from genesis accounts.
  					/ NOTE: The genutils module must also occur after auth so that it can access the params from auth.
  					InitGenesis: []string{
      authtypes.ModuleName,
  						banktypes.ModuleName,
  						distrtypes.ModuleName,
  						stakingtypes.ModuleName,
  						slashingtypes.ModuleName,
  						govtypes.ModuleName,
  						minttypes.ModuleName,
  						crisistypes.ModuleName,
  						genutiltypes.ModuleName,
  						evidencetypes.ModuleName,
  						authz.ModuleName,
  						feegrant.ModuleName,
  						nft.ModuleName,
  						group.ModuleName,
  						paramstypes.ModuleName,
  						upgradetypes.ModuleName,
  						vestingtypes.ModuleName,
  						consensustypes.ModuleName,
  						circuittypes.ModuleName,
  },
  					/ When ExportGenesis is not specified, the export genesis module order
  					/ is equal to the init genesis order
  					/ ExportGenesis: []string{
  },
  					/ Uncomment if you want to set a custom migration order here.
  					/ OrderMigrations: []string{
  },
  }),
  },
  			{
      Name: authtypes.ModuleName,
      Config: appconfig.WrapAny(&authmodulev1.Module{
      Bech32Prefix:             "cosmos",
      ModuleAccountPermissions: moduleAccPerms,
  					/ By default modules authority is the governance module. This is configurable with the following:
  					/ Authority: "group", / A custom module authority can be set using a module name
  					/ Authority: "cosmos1cwwv22j5ca08ggdv9c2uky355k908694z577tv", / or a specific address
  }),
  },
  			{
      Name:   vestingtypes.ModuleName,
      Config: appconfig.WrapAny(&vestingmodulev1.Module{
  }),
  },
  			{
      Name: banktypes.ModuleName,
      Config: appconfig.WrapAny(&bankmodulev1.Module{
      BlockedModuleAccountsOverride: blockAccAddrs,
  }),
  },
  			{
      Name:   stakingtypes.ModuleName,
      Config: appconfig.WrapAny(&stakingmodulev1.Module{
  }),
  },
  			{
      Name:   slashingtypes.ModuleName,
      Config: appconfig.WrapAny(&slashingmodulev1.Module{
  }),
  },
  			{
      Name:   paramstypes.ModuleName,
      Config: appconfig.WrapAny(&paramsmodulev1.Module{
  }),
  },
  			{
      Name:   "tx",
      Config: appconfig.WrapAny(&txconfigv1.Config{
  }),
  },
  			{
      Name:   genutiltypes.ModuleName,
      Config: appconfig.WrapAny(&genutilmodulev1.Module{
  }),
  },
  			{
      Name:   authz.ModuleName,
      Config: appconfig.WrapAny(&authzmodulev1.Module{
  }),
  },
  			{
      Name:   upgradetypes.ModuleName,
      Config: appconfig.WrapAny(&upgrademodulev1.Module{
  }),
  },
  			{
      Name:   distrtypes.ModuleName,
      Config: appconfig.WrapAny(&distrmodulev1.Module{
  }),
  },
  			{
      Name:   evidencetypes.ModuleName,
      Config: appconfig.WrapAny(&evidencemodulev1.Module{
  }),
  },
  			{
      Name:   minttypes.ModuleName,
      Config: appconfig.WrapAny(&mintmodulev1.Module{
  }),
  },
  			{
      Name: group.ModuleName,
      Config: appconfig.WrapAny(&groupmodulev1.Module{
      MaxExecutionPeriod: durationpb.New(time.Second * 1209600),
      MaxMetadataLen:     255,
  }),
  },
  			{
      Name:   nft.ModuleName,
      Config: appconfig.WrapAny(&nftmodulev1.Module{
  }),
  },
  			{
      Name:   feegrant.ModuleName,
      Config: appconfig.WrapAny(&feegrantmodulev1.Module{
  }),
  },
  			{
      Name:   govtypes.ModuleName,
      Config: appconfig.WrapAny(&govmodulev1.Module{
  }),
  },
  			{
      Name:   crisistypes.ModuleName,
      Config: appconfig.WrapAny(&crisismodulev1.Module{
  }),
  },
  			{
      Name:   consensustypes.ModuleName,
      Config: appconfig.WrapAny(&consensusmodulev1.Module{
  }),
  },
  			{
      Name:   circuittypes.ModuleName,
      Config: appconfig.WrapAny(&circuitmodulev1.Module{
  }),
  },
  },
  }),
  		depinject.Supply(
  			/ supply custom module basics
  			map[string]module.AppModuleBasic{
      genutiltypes.ModuleName: genutil.NewAppModuleBasic(genutiltypes.DefaultMessageValidator),
  				govtypes.ModuleName: gov.NewAppModuleBasic(
  					[]govclient.ProposalHandler{
      paramsclient.ProposalHandler,
  },
  				),
  },
  		))
  )
  

That message is generated using pulsar (by running make proto-gen). In the case of the group module, this file is generated here: Link.

The part that is relevant for the module configuration is:

/ Code generated by protoc-gen-go-pulsar. DO NOT EDIT.
package modulev1

import (
    
	_ "cosmossdk.io/api/amino"
	_ "cosmossdk.io/api/cosmos/app/v1alpha1"
	fmt "fmt"
	runtime "github.com/cosmos/cosmos-proto/runtime"
	_ "github.com/cosmos/gogoproto/gogoproto"
	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
	protoiface "google.golang.org/protobuf/runtime/protoiface"
	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
	durationpb "google.golang.org/protobuf/types/known/durationpb"
	io "io"
	reflect "reflect"
	sync "sync"
)

var (
	md_Module                      protoreflect.MessageDescriptor
	fd_Module_max_execution_period protoreflect.FieldDescriptor
	fd_Module_max_metadata_len     protoreflect.FieldDescriptor
)

func init() {
    file_cosmos_group_module_v1_module_proto_init()

md_Module = File_cosmos_group_module_v1_module_proto.Messages().ByName("Module")

fd_Module_max_execution_period = md_Module.Fields().ByName("max_execution_period")

fd_Module_max_metadata_len = md_Module.Fields().ByName("max_metadata_len")
}

var _ protoreflect.Message = (*fastReflection_Module)(nil)

type fastReflection_Module Module

func (x *Module)

ProtoReflect()

protoreflect.Message {
    return (*fastReflection_Module)(x)
}

func (x *Module)

slowProtoReflect()

protoreflect.Message {
    mi := &file_cosmos_group_module_v1_module_proto_msgTypes[0]
    if protoimpl.UnsafeEnabled && x != nil {
    ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
    if ms.LoadMessageInfo() == nil {
    ms.StoreMessageInfo(mi)
}

return ms
}

return mi.MessageOf(x)
}

var _fastReflection_Module_messageType fastReflection_Module_messageType
var _ protoreflect.MessageType = fastReflection_Module_messageType{
}

type fastReflection_Module_messageType struct{
}

func (x fastReflection_Module_messageType)

Zero()

protoreflect.Message {
    return (*fastReflection_Module)(nil)
}

func (x fastReflection_Module_messageType)

New()

protoreflect.Message {
    return new(fastReflection_Module)
}

func (x fastReflection_Module_messageType)

Descriptor()

protoreflect.MessageDescriptor {
    return md_Module
}

/ Descriptor returns message descriptor, which contains only the protobuf
/ type information for the message.
func (x *fastReflection_Module)

Descriptor()

protoreflect.MessageDescriptor {
    return md_Module
}

/ Type returns the message type, which encapsulates both Go and protobuf
/ type information. If the Go type information is not needed,
/ it is recommended that the message descriptor be used instead.
func (x *fastReflection_Module)

Type()

protoreflect.MessageType {
    return _fastReflection_Module_messageType
}

/ New returns a newly allocated and mutable empty message.
func (x *fastReflection_Module)

New()

protoreflect.Message {
    return new(fastReflection_Module)
}

/ Interface unwraps the message reflection interface and
/ returns the underlying ProtoMessage interface.
func (x *fastReflection_Module)

Interface()

protoreflect.ProtoMessage {
    return (*Module)(x)
}

/ Range iterates over every populated field in an undefined order,
/ calling f for each field descriptor and value encountered.
/ Range returns immediately if f returns false.
/ While iterating, mutating operations may only be performed
/ on the current field descriptor.
func (x *fastReflection_Module)

Range(f func(protoreflect.FieldDescriptor, protoreflect.Value)

bool) {
    if x.MaxExecutionPeriod != nil {
    value := protoreflect.ValueOfMessage(x.MaxExecutionPeriod.ProtoReflect())
    if !f(fd_Module_max_execution_period, value) {
    return
}
	
}
    if x.MaxMetadataLen != uint64(0) {
    value := protoreflect.ValueOfUint64(x.MaxMetadataLen)
    if !f(fd_Module_max_metadata_len, value) {
    return
}
	
}
}

/ Has reports whether a field is populated.
/
/ Some fields have the property of nullability where it is possible to
/ distinguish between the default value of a field and whether the field
/ was explicitly populated with the default value. Singular message fields,
/ member fields of a oneof, and proto2 scalar fields are nullable. Such
/ fields are populated only if explicitly set.
/
/ In other cases (aside from the nullable cases above),
/ a proto3 scalar field is populated if it contains a non-zero value, and
/ a repeated field is populated if it is non-empty.
func (x *fastReflection_Module)

Has(fd protoreflect.FieldDescriptor)

bool {
    switch fd.FullName() {
    case "cosmos.group.module.v1.Module.max_execution_period":
		return x.MaxExecutionPeriod != nil
    case "cosmos.group.module.v1.Module.max_metadata_len":
		return x.MaxMetadataLen != uint64(0)

default:
    if fd.IsExtension() {
    panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.group.module.v1.Module"))
}

panic(fmt.Errorf("message cosmos.group.module.v1.Module does not contain field %s", fd.FullName()))
}
}

/ Clear clears the field such that a subsequent Has call reports false.
/
/ Clearing an extension field clears both the extension type and value
/ associated with the given field number.
/
/ Clear is a mutating operation and unsafe for concurrent use.
func (x *fastReflection_Module)

Clear(fd protoreflect.FieldDescriptor) {
    switch fd.FullName() {
    case "cosmos.group.module.v1.Module.max_execution_period":
		x.MaxExecutionPeriod = nil
    case "cosmos.group.module.v1.Module.max_metadata_len":
		x.MaxMetadataLen = uint64(0)

default:
    if fd.IsExtension() {
    panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.group.module.v1.Module"))
}

panic(fmt.Errorf("message cosmos.group.module.v1.Module does not contain field %s", fd.FullName()))
}
}

/ Get retrieves the value for a field.
/
/ For unpopulated scalars, it returns the default value, where
/ the default value of a bytes scalar is guaranteed to be a copy.
/ For unpopulated composite types, it returns an empty, read-only view
/ of the value; to obtain a mutable reference, use Mutable.
func (x *fastReflection_Module)

Get(descriptor protoreflect.FieldDescriptor)

protoreflect.Value {
    switch descriptor.FullName() {
    case "cosmos.group.module.v1.Module.max_execution_period":
    value := x.MaxExecutionPeriod
		return protoreflect.ValueOfMessage(value.ProtoReflect())
    case "cosmos.group.module.v1.Module.max_metadata_len":
    value := x.MaxMetadataLen
		return protoreflect.ValueOfUint64(value)

default:
    if descriptor.IsExtension() {
    panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.group.module.v1.Module"))
}

panic(fmt.Errorf("message cosmos.group.module.v1.Module does not contain field %s", descriptor.FullName()))
}
}

/ Set stores the value for a field.
/
/ For a field belonging to a oneof, it implicitly clears any other field
/ that may be currently set within the same oneof.
/ For extension fields, it implicitly stores the provided ExtensionType.
/ When setting a composite type, it is unspecified whether the stored value
/ aliases the source's memory in any way. If the composite value is an
/ empty, read-only value, then it panics.
/
/ Set is a mutating operation and unsafe for concurrent use.
func (x *fastReflection_Module)

Set(fd protoreflect.FieldDescriptor, value protoreflect.Value) {
    switch fd.FullName() {
    case "cosmos.group.module.v1.Module.max_execution_period":
		x.MaxExecutionPeriod = value.Message().Interface().(*durationpb.Duration)
    case "cosmos.group.module.v1.Module.max_metadata_len":
		x.MaxMetadataLen = value.Uint()

default:
    if fd.IsExtension() {
    panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.group.module.v1.Module"))
}

panic(fmt.Errorf("message cosmos.group.module.v1.Module does not contain field %s", fd.FullName()))
}
}

/ Mutable returns a mutable reference to a composite type.
/
/ If the field is unpopulated, it may allocate a composite value.
/ For a field belonging to a oneof, it implicitly clears any other field
/ that may be currently set within the same oneof.
/ For extension fields, it implicitly stores the provided ExtensionType
/ if not already stored.
/ It panics if the field does not contain a composite type.
/
/ Mutable is a mutating operation and unsafe for concurrent use.
func (x *fastReflection_Module)

Mutable(fd protoreflect.FieldDescriptor)

protoreflect.Value {
    switch fd.FullName() {
    case "cosmos.group.module.v1.Module.max_execution_period":
    if x.MaxExecutionPeriod == nil {
    x.MaxExecutionPeriod = new(durationpb.Duration)
}

return protoreflect.ValueOfMessage(x.MaxExecutionPeriod.ProtoReflect())
    case "cosmos.group.module.v1.Module.max_metadata_len":
		panic(fmt.Errorf("field max_metadata_len of message cosmos.group.module.v1.Module is not mutable"))

default:
    if fd.IsExtension() {
    panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.group.module.v1.Module"))
}

panic(fmt.Errorf("message cosmos.group.module.v1.Module does not contain field %s", fd.FullName()))
}
}

/ NewField returns a new value that is assignable to the field
/ for the given descriptor. For scalars, this returns the default value.
/ For lists, maps, and messages, this returns a new, empty, mutable value.
func (x *fastReflection_Module)

NewField(fd protoreflect.FieldDescriptor)

protoreflect.Value {
    switch fd.FullName() {
    case "cosmos.group.module.v1.Module.max_execution_period":
    m := new(durationpb.Duration)

return protoreflect.ValueOfMessage(m.ProtoReflect())
    case "cosmos.group.module.v1.Module.max_metadata_len":
		return protoreflect.ValueOfUint64(uint64(0))

default:
    if fd.IsExtension() {
    panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.group.module.v1.Module"))
}

panic(fmt.Errorf("message cosmos.group.module.v1.Module does not contain field %s", fd.FullName()))
}
}

/ WhichOneof reports which field within the oneof is populated,
/ returning nil if none are populated.
/ It panics if the oneof descriptor does not belong to this message.
func (x *fastReflection_Module)

WhichOneof(d protoreflect.OneofDescriptor)

protoreflect.FieldDescriptor {
    switch d.FullName() {
    default:
		panic(fmt.Errorf("%s is not a oneof field in cosmos.group.module.v1.Module", d.FullName()))
}

panic("unreachable")
}

/ GetUnknown retrieves the entire list of unknown fields.
/ The caller may only mutate the contents of the RawFields
/ if the mutated bytes are stored back into the message with SetUnknown.
func (x *fastReflection_Module)

GetUnknown()

protoreflect.RawFields {
    return x.unknownFields
}

/ SetUnknown stores an entire list of unknown fields.
/ The raw fields must be syntactically valid according to the wire format.
/ An implementation may panic if this is not the case.
/ Once stored, the caller must not mutate the content of the RawFields.
/ An empty RawFields may be passed to clear the fields.
/
/ SetUnknown is a mutating operation and unsafe for concurrent use.
func (x *fastReflection_Module)

SetUnknown(fields protoreflect.RawFields) {
    x.unknownFields = fields
}

/ IsValid reports whether the message is valid.
/
/ An invalid message is an empty, read-only value.
/
/ An invalid message often corresponds to a nil pointer of the concrete
/ message type, but the details are implementation dependent.
/ Validity is not part of the protobuf data model, and may not
/ be preserved in marshaling or other operations.
func (x *fastReflection_Module)

IsValid()

bool {
    return x != nil
}

/ ProtoMethods returns optional fastReflectionFeature-path implementations of various operations.
/ This method may return nil.
/
/ The returned methods type is identical to
/ "google.golang.org/protobuf/runtime/protoiface".Methods.
/ Consult the protoiface package documentation for details.
func (x *fastReflection_Module)

ProtoMethods() *protoiface.Methods {
    size := func(input protoiface.SizeInput)

protoiface.SizeOutput {
    x := input.Message.Interface().(*Module)
    if x == nil {
    return protoiface.SizeOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Size:              0,
}
	
}
    options := runtime.SizeInputToOptions(input)
		_ = options
		var n int
		var l int
		_ = l
    if x.MaxExecutionPeriod != nil {
    l = options.Size(x.MaxExecutionPeriod)

n += 1 + l + runtime.Sov(uint64(l))
}
    if x.MaxMetadataLen != 0 {
    n += 1 + runtime.Sov(uint64(x.MaxMetadataLen))
}
    if x.unknownFields != nil {
    n += len(x.unknownFields)
}

return protoiface.SizeOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Size:              n,
}
	
}
    marshal := func(input protoiface.MarshalInput) (protoiface.MarshalOutput, error) {
    x := input.Message.Interface().(*Module)
    if x == nil {
    return protoiface.MarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Buf:               input.Buf,
}, nil
}
    options := runtime.MarshalInputToOptions(input)
		_ = options
    size := options.Size(x)
    dAtA := make([]byte, size)
    i := len(dAtA)
		_ = i
		var l int
		_ = l
    if x.unknownFields != nil {
    i -= len(x.unknownFields)

copy(dAtA[i:], x.unknownFields)
}
    if x.MaxMetadataLen != 0 {
    i = runtime.EncodeVarint(dAtA, i, uint64(x.MaxMetadataLen))

i--
			dAtA[i] = 0x10
}
    if x.MaxExecutionPeriod != nil {
    encoded, err := options.Marshal(x.MaxExecutionPeriod)
    if err != nil {
    return protoiface.MarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Buf:               input.Buf,
}, err
}

i -= len(encoded)

copy(dAtA[i:], encoded)

i = runtime.EncodeVarint(dAtA, i, uint64(len(encoded)))

i--
			dAtA[i] = 0xa
}
    if input.Buf != nil {
    input.Buf = append(input.Buf, dAtA...)
}

else {
    input.Buf = dAtA
}

return protoiface.MarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Buf:               input.Buf,
}, nil
}
    unmarshal := func(input protoiface.UnmarshalInput) (protoiface.UnmarshalOutput, error) {
    x := input.Message.Interface().(*Module)
    if x == nil {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags:             input.Flags,
}, nil
}
    options := runtime.UnmarshalInputToOptions(input)
		_ = options
    dAtA := input.Buf
    l := len(dAtA)
    iNdEx := 0
    for iNdEx < l {
    preIndex := iNdEx
			var wire uint64
    for shift := uint(0); ; shift += 7 {
    if shift >= 64 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, runtime.ErrIntOverflow
}
    if iNdEx >= l {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, io.ErrUnexpectedEOF
}
    b := dAtA[iNdEx]
				iNdEx++
				wire |= uint64(b&0x7F) << shift
    if b < 0x80 {
    break
}
	
}
    fieldNum := int32(wire >> 3)
    wireType := int(wire & 0x7)
    if wireType == 4 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, fmt.Errorf("proto: Module: wiretype end group for non-group")
}
    if fieldNum <= 0 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, fmt.Errorf("proto: Module: illegal tag %d (wire type %d)", fieldNum, wire)
}
    switch fieldNum {
    case 1:
    if wireType != 2 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, fmt.Errorf("proto: wrong wireType = %d for field MaxExecutionPeriod", wireType)
}

var msglen int
    for shift := uint(0); ; shift += 7 {
    if shift >= 64 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, runtime.ErrIntOverflow
}
    if iNdEx >= l {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, io.ErrUnexpectedEOF
}
    b := dAtA[iNdEx]
					iNdEx++
					msglen |= int(b&0x7F) << shift
    if b < 0x80 {
    break
}
	
}
    if msglen < 0 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, runtime.ErrInvalidLength
}
    postIndex := iNdEx + msglen
    if postIndex < 0 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, runtime.ErrInvalidLength
}
    if postIndex > l {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, io.ErrUnexpectedEOF
}
    if x.MaxExecutionPeriod == nil {
    x.MaxExecutionPeriod = &durationpb.Duration{
}
	
}
    if err := options.Unmarshal(dAtA[iNdEx:postIndex], x.MaxExecutionPeriod); err != nil {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, err
}

iNdEx = postIndex
    case 2:
    if wireType != 0 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, fmt.Errorf("proto: wrong wireType = %d for field MaxMetadataLen", wireType)
}

x.MaxMetadataLen = 0
    for shift := uint(0); ; shift += 7 {
    if shift >= 64 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, runtime.ErrIntOverflow
}
    if iNdEx >= l {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, io.ErrUnexpectedEOF
}
    b := dAtA[iNdEx]
					iNdEx++
					x.MaxMetadataLen |= uint64(b&0x7F) << shift
    if b < 0x80 {
    break
}
	
}

default:
				iNdEx = preIndex
				skippy, err := runtime.Skip(dAtA[iNdEx:])
    if err != nil {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, err
}
    if (skippy < 0) || (iNdEx+skippy) < 0 {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, runtime.ErrInvalidLength
}
    if (iNdEx + skippy) > l {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, io.ErrUnexpectedEOF
}
    if !options.DiscardUnknown {
    x.unknownFields = append(x.unknownFields, dAtA[iNdEx:iNdEx+skippy]...)
}

iNdEx += skippy
}
	
}
    if iNdEx > l {
    return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, io.ErrUnexpectedEOF
}

return protoiface.UnmarshalOutput{
    NoUnkeyedLiterals: input.NoUnkeyedLiterals,
    Flags: input.Flags
}, nil
}

return &protoiface.Methods{
    NoUnkeyedLiterals: struct{
}{
},
    Flags:             protoiface.SupportMarshalDeterministic | protoiface.SupportUnmarshalDiscardUnknown,
    Size:              size,
    Marshal:           marshal,
    Unmarshal:         unmarshal,
    Merge:             nil,
    CheckInitialized:  nil,
}
}

/ Code generated by protoc-gen-go. DO NOT EDIT.
/ versions:
/ 	protoc-gen-go v1.27.0
/ 	protoc        (unknown)
/ source: cosmos/group/module/v1/module.proto

const (
	/ Verify that this generated code is sufficiently up-to-date.
	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
	/ Verify that runtime/protoimpl is sufficiently up-to-date.
	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)

/ Module is the config object of the group module.
type Module struct {
    state         protoimpl.MessageState
	sizeCache     protoimpl.SizeCache
	unknownFields protoimpl.UnknownFields

	/ max_execution_period defines the max duration after a proposal's voting period ends that members can send a MsgExec
	/ to execute the proposal.
	MaxExecutionPeriod *durationpb.Duration `protobuf:"bytes,1,opt,name=max_execution_period,json=maxExecutionPeriod,proto3" json:"max_execution_period,omitempty"`
	/ max_metadata_len defines the max length of the metadata bytes field for various entities within the group module.
	/ Defaults to 255 if not explicitly set.
	MaxMetadataLen uint64 `protobuf:"varint,2,opt,name=max_metadata_len,json=maxMetadataLen,proto3" json:"max_metadata_len,omitempty"`
}

func (x *Module)

Reset() {
	*x = Module{
}
    if protoimpl.UnsafeEnabled {
    mi := &file_cosmos_group_module_v1_module_proto_msgTypes[0]
    ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))

ms.StoreMessageInfo(mi)
}
}

func (x *Module)

String()

string {
    return protoimpl.X.MessageStringOf(x)
}

func (*Module)

ProtoMessage() {
}

/ Deprecated: Use Module.ProtoReflect.Descriptor instead.
func (*Module)

Descriptor() ([]byte, []int) {
    return file_cosmos_group_module_v1_module_proto_rawDescGZIP(), []int{0
}
}

func (x *Module)

GetMaxExecutionPeriod() *durationpb.Duration {
    if x != nil {
    return x.MaxExecutionPeriod
}

return nil
}

func (x *Module)

GetMaxMetadataLen()

uint64 {
    if x != nil {
    return x.MaxMetadataLen
}

return 0
}

var File_cosmos_group_module_v1_module_proto protoreflect.FileDescriptor

var file_cosmos_group_module_v1_module_proto_rawDesc = []byte{
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}

var (
	file_cosmos_group_module_v1_module_proto_rawDescOnce sync.Once
	file_cosmos_group_module_v1_module_proto_rawDescData = file_cosmos_group_module_v1_module_proto_rawDesc
)

func file_cosmos_group_module_v1_module_proto_rawDescGZIP() []byte {
    file_cosmos_group_module_v1_module_proto_rawDescOnce.Do(func() {
    file_cosmos_group_module_v1_module_proto_rawDescData = protoimpl.X.CompressGZIP(file_cosmos_group_module_v1_module_proto_rawDescData)
})

return file_cosmos_group_module_v1_module_proto_rawDescData
}

var file_cosmos_group_module_v1_module_proto_msgTypes = make([]protoimpl.MessageInfo, 1)

var file_cosmos_group_module_v1_module_proto_goTypes = []interface{
}{
	(*Module)(nil),              / 0: cosmos.group.module.v1.Module
	(*durationpb.Duration)(nil), / 1: google.protobuf.Duration
}

var file_cosmos_group_module_v1_module_proto_depIdxs = []int32{
	1, / 0: cosmos.group.module.v1.Module.max_execution_period:type_name -> google.protobuf.Duration
	1, / [1:1] is the sub-list for method output_type
	1, / [1:1] is the sub-list for method input_type
	1, / [1:1] is the sub-list for extension type_name
	1, / [1:1] is the sub-list for extension extendee
	0, / [0:1] is the sub-list for field type_name
}

func init() {
    file_cosmos_group_module_v1_module_proto_init()
}

func file_cosmos_group_module_v1_module_proto_init() {
    if File_cosmos_group_module_v1_module_proto != nil {
    return
}
    if !protoimpl.UnsafeEnabled {
    file_cosmos_group_module_v1_module_proto_msgTypes[0].Exporter = func(v interface{
}, i int)

interface{
} {
    switch v := v.(*Module); i {
    case 0:
				return &v.state
    case 1:
				return &v.sizeCache
    case 2:
				return &v.unknownFields
			default:
				return nil
}
	
}
	
}

type x struct{
}
    out := protoimpl.TypeBuilder{
    File: protoimpl.DescBuilder{
    GoPackagePath: reflect.TypeOf(x{
}).PkgPath(),
    RawDescriptor: file_cosmos_group_module_v1_module_proto_rawDesc,
    NumEnums:      0,
    NumMessages:   1,
    NumExtensions: 0,
    NumServices:   0,
},
    GoTypes:           file_cosmos_group_module_v1_module_proto_goTypes,
    DependencyIndexes: file_cosmos_group_module_v1_module_proto_depIdxs,
    MessageInfos:      file_cosmos_group_module_v1_module_proto_msgTypes,
}.Build()

File_cosmos_group_module_v1_module_proto = out.File
	file_cosmos_group_module_v1_module_proto_rawDesc = nil
	file_cosmos_group_module_v1_module_proto_goTypes = nil
	file_cosmos_group_module_v1_module_proto_depIdxs = nil
}

Pulsar is optional. The official protoc-gen-go can be used as well.

Dependency Definition

Once the configuration proto is defined, the module’s module.go must define what dependencies are required by the module. The boilerplate is similar for all modules.

All methods, structs and their fields must be public for depinject.

1. Import the module configuration generated package:

   package module
   
   import (
       
   	"context"
       "encoding/json"
       "fmt"
   
   	abci "github.com/cometbft/cometbft/abci/types"
   	gwruntime "github.com/grpc-ecosystem/grpc-gateway/runtime"
       "github.com/spf13/cobra"
   
   	modulev1 "cosmossdk.io/api/cosmos/group/module/v1"
       "cosmossdk.io/core/address"
       "cosmossdk.io/core/appmodule"
       "cosmossdk.io/depinject"
   
   	store "cosmossdk.io/store/types"
       "github.com/cosmos/cosmos-sdk/baseapp"
   	sdkclient "github.com/cosmos/cosmos-sdk/client"
       "github.com/cosmos/cosmos-sdk/codec"
   	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
   	sdk "github.com/cosmos/cosmos-sdk/types"
       "github.com/cosmos/cosmos-sdk/types/module"
   	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
       "github.com/cosmos/cosmos-sdk/x/group"
       "github.com/cosmos/cosmos-sdk/x/group/client/cli"
       "github.com/cosmos/cosmos-sdk/x/group/keeper"
       "github.com/cosmos/cosmos-sdk/x/group/simulation"
   )
   
   / ConsensusVersion defines the current x/group module consensus version.
   const ConsensusVersion = 2
   
   var (
   	_ module.AppModuleBasic      = AppModuleBasic{
   }
   	_ module.AppModuleSimulation = AppModule{
   }
   )
   
   type AppModule struct {
       AppModuleBasic
   	keeper     keeper.Keeper
   	bankKeeper group.BankKeeper
   	accKeeper  group.AccountKeeper
   	registry   cdctypes.InterfaceRegistry
   }
   
   / NewAppModule creates a new AppModule object
   func NewAppModule(cdc codec.Codec, keeper keeper.Keeper, ak group.AccountKeeper, bk group.BankKeeper, registry cdctypes.InterfaceRegistry)
   
   AppModule {
       return AppModule{
       AppModuleBasic: AppModuleBasic{
       cdc: cdc, ac: ak.AddressCodec()
   },
   		keeper:         keeper,
   		bankKeeper:     bk,
   		accKeeper:      ak,
   		registry:       registry,
   }
   }
   
   var (
   	_ appmodule.AppModule     = AppModule{
   }
   	_ appmodule.HasEndBlocker = AppModule{
   }
   )
   
   / IsOnePerModuleType implements the depinject.OnePerModuleType interface.
   func (am AppModule)
   
   IsOnePerModuleType() {
   }
   
   / IsAppModule implements the appmodule.AppModule interface.
   func (am AppModule)
   
   IsAppModule() {
   }
   
   type AppModuleBasic struct {
       cdc codec.Codec
   	ac  address.Codec
   }
   
   / Name returns the group module's name.
   func (AppModuleBasic)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / DefaultGenesis returns default genesis state as raw bytes for the group
   / module.
   func (AppModuleBasic)
   
   DefaultGenesis(cdc codec.JSONCodec)
   
   json.RawMessage {
       return cdc.MustMarshalJSON(group.NewGenesisState())
   }
   
   / ValidateGenesis performs genesis state validation for the group module.
   func (AppModuleBasic)
   
   ValidateGenesis(cdc codec.JSONCodec, config sdkclient.TxEncodingConfig, bz json.RawMessage)
   
   error {
       var data group.GenesisState
       if err := cdc.UnmarshalJSON(bz, &data); err != nil {
       return fmt.Errorf("failed to unmarshal %s genesis state: %w", group.ModuleName, err)
   }
   
   return data.Validate()
   }
   
   / GetQueryCmd returns the cli query commands for the group module
   func (a AppModuleBasic)
   
   GetQueryCmd() *cobra.Command {
       return cli.QueryCmd(a.Name())
   }
   
   / GetTxCmd returns the transaction commands for the group module
   func (a AppModuleBasic)
   
   GetTxCmd() *cobra.Command {
       return cli.TxCmd(a.Name(), a.ac)
   }
   
   / RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the group module.
   func (a AppModuleBasic)
   
   RegisterGRPCGatewayRoutes(clientCtx sdkclient.Context, mux *gwruntime.ServeMux) {
       if err := group.RegisterQueryHandlerClient(context.Background(), mux, group.NewQueryClient(clientCtx)); err != nil {
       panic(err)
   }
   }
   
   / RegisterInterfaces registers the group module's interface types
   func (AppModuleBasic)
   
   RegisterInterfaces(registry cdctypes.InterfaceRegistry) {
       group.RegisterInterfaces(registry)
   }
   
   / RegisterLegacyAminoCodec registers the group module's types for the given codec.
   func (AppModuleBasic)
   
   RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
       group.RegisterLegacyAminoCodec(cdc)
   }
   
   / Name returns the group module's name.
   func (AppModule)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / RegisterInvariants does nothing, there are no invariants to enforce
   func (am AppModule)
   
   RegisterInvariants(ir sdk.InvariantRegistry) {
       keeper.RegisterInvariants(ir, am.keeper)
   }
   
   / InitGenesis performs genesis initialization for the group module. It returns
   / no validator updates.
   func (am AppModule)
   
   InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) []abci.ValidatorUpdate {
       am.keeper.InitGenesis(ctx, cdc, data)
   
   return []abci.ValidatorUpdate{
   }
   }
   
   / ExportGenesis returns the exported genesis state as raw bytes for the group
   / module.
   func (am AppModule)
   
   ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec)
   
   json.RawMessage {
       gs := am.keeper.ExportGenesis(ctx, cdc)
   
   return cdc.MustMarshalJSON(gs)
   }
   
   / RegisterServices registers a gRPC query service to respond to the
   / module-specific gRPC queries.
   func (am AppModule)
   
   RegisterServices(cfg module.Configurator) {
       group.RegisterMsgServer(cfg.MsgServer(), am.keeper)
   
   group.RegisterQueryServer(cfg.QueryServer(), am.keeper)
       m := keeper.NewMigrator(am.keeper)
       if err := cfg.RegisterMigration(group.ModuleName, 1, m.Migrate1to2); err != nil {
       panic(fmt.Sprintf("failed to migrate x/%s from version 1 to 2: %v", group.ModuleName, err))
   }
   }
   
   / ConsensusVersion implements AppModule/ConsensusVersion.
   func (AppModule)
   
   ConsensusVersion()
   
   uint64 {
       return ConsensusVersion
   }
   
   / EndBlock implements the group module's EndBlock.
   func (am AppModule)
   
   EndBlock(ctx context.Context)
   
   error {
       c := sdk.UnwrapSDKContext(ctx)
   
   return EndBlocker(c, am.keeper)
   }
   
   / ____________________________________________________________________________
   
   / AppModuleSimulation functions
   
   / GenerateGenesisState creates a randomized GenState of the group module.
   func (AppModule)
   
   GenerateGenesisState(simState *module.SimulationState) {
       simulation.RandomizedGenState(simState)
   }
   
   / RegisterStoreDecoder registers a decoder for group module's types
   func (am AppModule)
   
   RegisterStoreDecoder(sdr simtypes.StoreDecoderRegistry) {
       sdr[group.StoreKey] = simulation.NewDecodeStore(am.cdc)
   }
   
   / WeightedOperations returns the all the gov module operations with their respective weights.
   func (am AppModule)
   
   WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
       return simulation.WeightedOperations(
   		am.registry,
   		simState.AppParams, simState.Cdc, simState.TxConfig,
   		am.accKeeper, am.bankKeeper, am.keeper, am.cdc,
   	)
   }
   
   /
   / App Wiring Setup
   /
   
   func init() {
       appmodule.Register(
   		&modulev1.Module{
   },
   		appmodule.Provide(ProvideModule),
   	)
   }
   
   type GroupInputs struct {
       depinject.In
   
   	Config           *modulev1.Module
   	Key              *store.KVStoreKey
   	Cdc              codec.Codec
   	AccountKeeper    group.AccountKeeper
   	BankKeeper       group.BankKeeper
   	Registry         cdctypes.InterfaceRegistry
   	MsgServiceRouter baseapp.MessageRouter
   }
   
   type GroupOutputs struct {
       depinject.Out
   
   	GroupKeeper keeper.Keeper
   	Module      appmodule.AppModule
   }
   
   func ProvideModule(in GroupInputs)
   
   GroupOutputs {
   	/*
   		Example of setting group params:
   		in.Config.MaxMetadataLen = 1000
   		in.Config.MaxExecutionPeriod = "1209600s"
   	*/
       k := keeper.NewKeeper(in.Key, in.Cdc, in.MsgServiceRouter, in.AccountKeeper, group.Config{
       MaxExecutionPeriod: in.Config.MaxExecutionPeriod.AsDuration(),
       MaxMetadataLen: in.Config.MaxMetadataLen
   })
       m := NewAppModule(in.Cdc, k, in.AccountKeeper, in.BankKeeper, in.Registry)
   
   return GroupOutputs{
       GroupKeeper: k,
       Module: m
   }
   }
   

   Define an init() function for defining the providers of the module configuration:
   This registers the module configuration message and the wiring of the module.

   package module
   
   import (
       
   	"context"
       "encoding/json"
       "fmt"
   
   	abci "github.com/cometbft/cometbft/abci/types"
   	gwruntime "github.com/grpc-ecosystem/grpc-gateway/runtime"
       "github.com/spf13/cobra"
   
   	modulev1 "cosmossdk.io/api/cosmos/group/module/v1"
       "cosmossdk.io/core/address"
       "cosmossdk.io/core/appmodule"
       "cosmossdk.io/depinject"
   
   	store "cosmossdk.io/store/types"
       "github.com/cosmos/cosmos-sdk/baseapp"
   	sdkclient "github.com/cosmos/cosmos-sdk/client"
       "github.com/cosmos/cosmos-sdk/codec"
   	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
   	sdk "github.com/cosmos/cosmos-sdk/types"
       "github.com/cosmos/cosmos-sdk/types/module"
   	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
       "github.com/cosmos/cosmos-sdk/x/group"
       "github.com/cosmos/cosmos-sdk/x/group/client/cli"
       "github.com/cosmos/cosmos-sdk/x/group/keeper"
       "github.com/cosmos/cosmos-sdk/x/group/simulation"
   )
   
   / ConsensusVersion defines the current x/group module consensus version.
   const ConsensusVersion = 2
   
   var (
   	_ module.AppModuleBasic      = AppModuleBasic{
   }
   	_ module.AppModuleSimulation = AppModule{
   }
   )
   
   type AppModule struct {
       AppModuleBasic
   	keeper     keeper.Keeper
   	bankKeeper group.BankKeeper
   	accKeeper  group.AccountKeeper
   	registry   cdctypes.InterfaceRegistry
   }
   
   / NewAppModule creates a new AppModule object
   func NewAppModule(cdc codec.Codec, keeper keeper.Keeper, ak group.AccountKeeper, bk group.BankKeeper, registry cdctypes.InterfaceRegistry)
   
   AppModule {
       return AppModule{
       AppModuleBasic: AppModuleBasic{
       cdc: cdc, ac: ak.AddressCodec()
   },
   		keeper:         keeper,
   		bankKeeper:     bk,
   		accKeeper:      ak,
   		registry:       registry,
   }
   }
   
   var (
   	_ appmodule.AppModule     = AppModule{
   }
   	_ appmodule.HasEndBlocker = AppModule{
   }
   )
   
   / IsOnePerModuleType implements the depinject.OnePerModuleType interface.
   func (am AppModule)
   
   IsOnePerModuleType() {
   }
   
   / IsAppModule implements the appmodule.AppModule interface.
   func (am AppModule)
   
   IsAppModule() {
   }
   
   type AppModuleBasic struct {
       cdc codec.Codec
   	ac  address.Codec
   }
   
   / Name returns the group module's name.
   func (AppModuleBasic)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / DefaultGenesis returns default genesis state as raw bytes for the group
   / module.
   func (AppModuleBasic)
   
   DefaultGenesis(cdc codec.JSONCodec)
   
   json.RawMessage {
       return cdc.MustMarshalJSON(group.NewGenesisState())
   }
   
   / ValidateGenesis performs genesis state validation for the group module.
   func (AppModuleBasic)
   
   ValidateGenesis(cdc codec.JSONCodec, config sdkclient.TxEncodingConfig, bz json.RawMessage)
   
   error {
       var data group.GenesisState
       if err := cdc.UnmarshalJSON(bz, &data); err != nil {
       return fmt.Errorf("failed to unmarshal %s genesis state: %w", group.ModuleName, err)
   }
   
   return data.Validate()
   }
   
   / GetQueryCmd returns the cli query commands for the group module
   func (a AppModuleBasic)
   
   GetQueryCmd() *cobra.Command {
       return cli.QueryCmd(a.Name())
   }
   
   / GetTxCmd returns the transaction commands for the group module
   func (a AppModuleBasic)
   
   GetTxCmd() *cobra.Command {
       return cli.TxCmd(a.Name(), a.ac)
   }
   
   / RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the group module.
   func (a AppModuleBasic)
   
   RegisterGRPCGatewayRoutes(clientCtx sdkclient.Context, mux *gwruntime.ServeMux) {
       if err := group.RegisterQueryHandlerClient(context.Background(), mux, group.NewQueryClient(clientCtx)); err != nil {
       panic(err)
   }
   }
   
   / RegisterInterfaces registers the group module's interface types
   func (AppModuleBasic)
   
   RegisterInterfaces(registry cdctypes.InterfaceRegistry) {
       group.RegisterInterfaces(registry)
   }
   
   / RegisterLegacyAminoCodec registers the group module's types for the given codec.
   func (AppModuleBasic)
   
   RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
       group.RegisterLegacyAminoCodec(cdc)
   }
   
   / Name returns the group module's name.
   func (AppModule)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / RegisterInvariants does nothing, there are no invariants to enforce
   func (am AppModule)
   
   RegisterInvariants(ir sdk.InvariantRegistry) {
       keeper.RegisterInvariants(ir, am.keeper)
   }
   
   / InitGenesis performs genesis initialization for the group module. It returns
   / no validator updates.
   func (am AppModule)
   
   InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) []abci.ValidatorUpdate {
       am.keeper.InitGenesis(ctx, cdc, data)
   
   return []abci.ValidatorUpdate{
   }
   }
   
   / ExportGenesis returns the exported genesis state as raw bytes for the group
   / module.
   func (am AppModule)
   
   ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec)
   
   json.RawMessage {
       gs := am.keeper.ExportGenesis(ctx, cdc)
   
   return cdc.MustMarshalJSON(gs)
   }
   
   / RegisterServices registers a gRPC query service to respond to the
   / module-specific gRPC queries.
   func (am AppModule)
   
   RegisterServices(cfg module.Configurator) {
       group.RegisterMsgServer(cfg.MsgServer(), am.keeper)
   
   group.RegisterQueryServer(cfg.QueryServer(), am.keeper)
       m := keeper.NewMigrator(am.keeper)
       if err := cfg.RegisterMigration(group.ModuleName, 1, m.Migrate1to2); err != nil {
       panic(fmt.Sprintf("failed to migrate x/%s from version 1 to 2: %v", group.ModuleName, err))
   }
   }
   
   / ConsensusVersion implements AppModule/ConsensusVersion.
   func (AppModule)
   
   ConsensusVersion()
   
   uint64 {
       return ConsensusVersion
   }
   
   / EndBlock implements the group module's EndBlock.
   func (am AppModule)
   
   EndBlock(ctx context.Context)
   
   error {
       c := sdk.UnwrapSDKContext(ctx)
   
   return EndBlocker(c, am.keeper)
   }
   
   / ____________________________________________________________________________
   
   / AppModuleSimulation functions
   
   / GenerateGenesisState creates a randomized GenState of the group module.
   func (AppModule)
   
   GenerateGenesisState(simState *module.SimulationState) {
       simulation.RandomizedGenState(simState)
   }
   
   / RegisterStoreDecoder registers a decoder for group module's types
   func (am AppModule)
   
   RegisterStoreDecoder(sdr simtypes.StoreDecoderRegistry) {
       sdr[group.StoreKey] = simulation.NewDecodeStore(am.cdc)
   }
   
   / WeightedOperations returns the all the gov module operations with their respective weights.
   func (am AppModule)
   
   WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
       return simulation.WeightedOperations(
   		am.registry,
   		simState.AppParams, simState.Cdc, simState.TxConfig,
   		am.accKeeper, am.bankKeeper, am.keeper, am.cdc,
   	)
   }
   
   /
   / App Wiring Setup
   /
   
   func init() {
       appmodule.Register(
   		&modulev1.Module{
   },
   		appmodule.Provide(ProvideModule),
   	)
   }
   
   type GroupInputs struct {
       depinject.In
   
   	Config           *modulev1.Module
   	Key              *store.KVStoreKey
   	Cdc              codec.Codec
   	AccountKeeper    group.AccountKeeper
   	BankKeeper       group.BankKeeper
   	Registry         cdctypes.InterfaceRegistry
   	MsgServiceRouter baseapp.MessageRouter
   }
   
   type GroupOutputs struct {
       depinject.Out
   
   	GroupKeeper keeper.Keeper
   	Module      appmodule.AppModule
   }
   
   func ProvideModule(in GroupInputs)
   
   GroupOutputs {
   	/*
   		Example of setting group params:
   		in.Config.MaxMetadataLen = 1000
   		in.Config.MaxExecutionPeriod = "1209600s"
   	*/
       k := keeper.NewKeeper(in.Key, in.Cdc, in.MsgServiceRouter, in.AccountKeeper, group.Config{
       MaxExecutionPeriod: in.Config.MaxExecutionPeriod.AsDuration(),
       MaxMetadataLen: in.Config.MaxMetadataLen
   })
       m := NewAppModule(in.Cdc, k, in.AccountKeeper, in.BankKeeper, in.Registry)
   
   return GroupOutputs{
       GroupKeeper: k,
       Module: m
   }
   }
   

2. Ensure that the module implements the appmodule.AppModule interface:

   package module
   
   import (
       
   	"context"
       "encoding/json"
       "fmt"
   
   	abci "github.com/cometbft/cometbft/abci/types"
   	gwruntime "github.com/grpc-ecosystem/grpc-gateway/runtime"
       "github.com/spf13/cobra"
   
   	modulev1 "cosmossdk.io/api/cosmos/group/module/v1"
       "cosmossdk.io/core/appmodule"
       "cosmossdk.io/depinject"
       "github.com/cosmos/cosmos-sdk/baseapp"
   	sdkclient "github.com/cosmos/cosmos-sdk/client"
       "github.com/cosmos/cosmos-sdk/codec"
   	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
   	store "github.com/cosmos/cosmos-sdk/store/types"
   	sdk "github.com/cosmos/cosmos-sdk/types"
       "github.com/cosmos/cosmos-sdk/types/module"
   	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
       "github.com/cosmos/cosmos-sdk/x/group"
       "github.com/cosmos/cosmos-sdk/x/group/client/cli"
       "github.com/cosmos/cosmos-sdk/x/group/keeper"
       "github.com/cosmos/cosmos-sdk/x/group/simulation"
   )
   
   / ConsensusVersion defines the current x/group module consensus version.
   const ConsensusVersion = 2
   
   var (
   	_ module.EndBlockAppModule   = AppModule{
   }
   	_ module.AppModuleBasic      = AppModuleBasic{
   }
   	_ module.AppModuleSimulation = AppModule{
   }
   )
   
   type AppModule struct {
       AppModuleBasic
   	keeper     keeper.Keeper
   	bankKeeper group.BankKeeper
   	accKeeper  group.AccountKeeper
   	registry   cdctypes.InterfaceRegistry
   }
   
   / NewAppModule creates a new AppModule object
   func NewAppModule(cdc codec.Codec, keeper keeper.Keeper, ak group.AccountKeeper, bk group.BankKeeper, registry cdctypes.InterfaceRegistry)
   
   AppModule {
       return AppModule{
       AppModuleBasic: AppModuleBasic{
       cdc: cdc
   },
   		keeper:         keeper,
   		bankKeeper:     bk,
   		accKeeper:      ak,
   		registry:       registry,
   }
   }
   
   var _ appmodule.AppModule = AppModule{
   }
   
   / IsOnePerModuleType implements the depinject.OnePerModuleType interface.
   func (am AppModule)
   
   IsOnePerModuleType() {
   }
   
   / IsAppModule implements the appmodule.AppModule interface.
   func (am AppModule)
   
   IsAppModule() {
   }
   
   type AppModuleBasic struct {
       cdc codec.Codec
   }
   
   / Name returns the group module's name.
   func (AppModuleBasic)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / DefaultGenesis returns default genesis state as raw bytes for the group
   / module.
   func (AppModuleBasic)
   
   DefaultGenesis(cdc codec.JSONCodec)
   
   json.RawMessage {
       return cdc.MustMarshalJSON(group.NewGenesisState())
   }
   
   / ValidateGenesis performs genesis state validation for the group module.
   func (AppModuleBasic)
   
   ValidateGenesis(cdc codec.JSONCodec, config sdkclient.TxEncodingConfig, bz json.RawMessage)
   
   error {
       var data group.GenesisState
       if err := cdc.UnmarshalJSON(bz, &data); err != nil {
       return fmt.Errorf("failed to unmarshal %s genesis state: %w", group.ModuleName, err)
   }
   
   return data.Validate()
   }
   
   / GetQueryCmd returns the cli query commands for the group module
   func (a AppModuleBasic)
   
   GetQueryCmd() *cobra.Command {
       return cli.QueryCmd(a.Name())
   }
   
   / GetTxCmd returns the transaction commands for the group module
   func (a AppModuleBasic)
   
   GetTxCmd() *cobra.Command {
       return cli.TxCmd(a.Name())
   }
   
   / RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the group module.
   func (a AppModuleBasic)
   
   RegisterGRPCGatewayRoutes(clientCtx sdkclient.Context, mux *gwruntime.ServeMux) {
       if err := group.RegisterQueryHandlerClient(context.Background(), mux, group.NewQueryClient(clientCtx)); err != nil {
       panic(err)
   }
   }
   
   / RegisterInterfaces registers the group module's interface types
   func (AppModuleBasic)
   
   RegisterInterfaces(registry cdctypes.InterfaceRegistry) {
       group.RegisterInterfaces(registry)
   }
   
   / RegisterLegacyAminoCodec registers the group module's types for the given codec.
   func (AppModuleBasic)
   
   RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
       group.RegisterLegacyAminoCodec(cdc)
   }
   
   / Name returns the group module's name.
   func (AppModule)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / RegisterInvariants does nothing, there are no invariants to enforce
   func (am AppModule)
   
   RegisterInvariants(ir sdk.InvariantRegistry) {
       keeper.RegisterInvariants(ir, am.keeper)
   }
   
   func (am AppModule)
   
   NewHandler()
   
   sdk.Handler {
       return nil
   }
   
   / InitGenesis performs genesis initialization for the group module. It returns
   / no validator updates.
   func (am AppModule)
   
   InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) []abci.ValidatorUpdate {
       am.keeper.InitGenesis(ctx, cdc, data)
   
   return []abci.ValidatorUpdate{
   }
   }
   
   / ExportGenesis returns the exported genesis state as raw bytes for the group
   / module.
   func (am AppModule)
   
   ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec)
   
   json.RawMessage {
       gs := am.keeper.ExportGenesis(ctx, cdc)
   
   return cdc.MustMarshalJSON(gs)
   }
   
   / RegisterServices registers a gRPC query service to respond to the
   / module-specific gRPC queries.
   func (am AppModule)
   
   RegisterServices(cfg module.Configurator) {
       group.RegisterMsgServer(cfg.MsgServer(), am.keeper)
   
   group.RegisterQueryServer(cfg.QueryServer(), am.keeper)
       m := keeper.NewMigrator(am.keeper)
       if err := cfg.RegisterMigration(group.ModuleName, 1, m.Migrate1to2); err != nil {
       panic(fmt.Sprintf("failed to migrate x/%s from version 1 to 2: %v", group.ModuleName, err))
   }
   }
   
   / ConsensusVersion implements AppModule/ConsensusVersion.
   func (AppModule)
   
   ConsensusVersion()
   
   uint64 {
       return ConsensusVersion
   }
   
   / EndBlock implements the group module's EndBlock.
   func (am AppModule)
   
   EndBlock(ctx sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate {
       EndBlocker(ctx, am.keeper)
   
   return []abci.ValidatorUpdate{
   }
   }
   
   / ____________________________________________________________________________
   
   / AppModuleSimulation functions
   
   / GenerateGenesisState creates a randomized GenState of the group module.
   func (AppModule)
   
   GenerateGenesisState(simState *module.SimulationState) {
       simulation.RandomizedGenState(simState)
   }
   
   / RegisterStoreDecoder registers a decoder for group module's types
   func (am AppModule)
   
   RegisterStoreDecoder(sdr sdk.StoreDecoderRegistry) {
       sdr[group.StoreKey] = simulation.NewDecodeStore(am.cdc)
   }
   
   / WeightedOperations returns the all the gov module operations with their respective weights.
   func (am AppModule)
   
   WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
       return simulation.WeightedOperations(
   		am.registry,
   		simState.AppParams, simState.Cdc,
   		am.accKeeper, am.bankKeeper, am.keeper, am.cdc,
   	)
   }
   
   /
   / App Wiring Setup
   /
   
   func init() {
       appmodule.Register(
   		&modulev1.Module{
   },
   		appmodule.Provide(ProvideModule),
   	)
   }
   
   type GroupInputs struct {
       depinject.In
   
   	Config           *modulev1.Module
   	Key              *store.KVStoreKey
   	Cdc              codec.Codec
   	AccountKeeper    group.AccountKeeper
   	BankKeeper       group.BankKeeper
   	Registry         cdctypes.InterfaceRegistry
   	MsgServiceRouter *baseapp.MsgServiceRouter
   }
   
   type GroupOutputs struct {
       depinject.Out
   
   	GroupKeeper keeper.Keeper
   	Module      appmodule.AppModule
   }
   
   func ProvideModule(in GroupInputs)
   
   GroupOutputs {
   	/*
   		Example of setting group params:
   		in.Config.MaxMetadataLen = 1000
   		in.Config.MaxExecutionPeriod = "1209600s"
   	*/
       k := keeper.NewKeeper(in.Key, in.Cdc, in.MsgServiceRouter, in.AccountKeeper, group.Config{
       MaxExecutionPeriod: in.Config.MaxExecutionPeriod.AsDuration(),
       MaxMetadataLen: in.Config.MaxMetadataLen
   })
       m := NewAppModule(in.Cdc, k, in.AccountKeeper, in.BankKeeper, in.Registry)
   
   return GroupOutputs{
       GroupKeeper: k,
       Module: m
   }
   }
   

3. Define a struct that inherits depinject.In and define the module inputs (i.e. module dependencies):

   • depinject provides the right dependencies to the module.
   • depinject also checks that all dependencies are provided.

   :::tip For making a dependency optional, add the optional:"true" struct tag.\

   package module
   
   import (
       
   	"context"
       "encoding/json"
       "fmt"
   
   	abci "github.com/cometbft/cometbft/abci/types"
   	gwruntime "github.com/grpc-ecosystem/grpc-gateway/runtime"
       "github.com/spf13/cobra"
   
   	modulev1 "cosmossdk.io/api/cosmos/group/module/v1"
       "cosmossdk.io/core/address"
       "cosmossdk.io/core/appmodule"
       "cosmossdk.io/depinject"
   
   	store "cosmossdk.io/store/types"
       "github.com/cosmos/cosmos-sdk/baseapp"
   	sdkclient "github.com/cosmos/cosmos-sdk/client"
       "github.com/cosmos/cosmos-sdk/codec"
   	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
   	sdk "github.com/cosmos/cosmos-sdk/types"
       "github.com/cosmos/cosmos-sdk/types/module"
   	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
       "github.com/cosmos/cosmos-sdk/x/group"
       "github.com/cosmos/cosmos-sdk/x/group/client/cli"
       "github.com/cosmos/cosmos-sdk/x/group/keeper"
       "github.com/cosmos/cosmos-sdk/x/group/simulation"
   )
   
   / ConsensusVersion defines the current x/group module consensus version.
   const ConsensusVersion = 2
   
   var (
   	_ module.AppModuleBasic      = AppModuleBasic{
   }
   	_ module.AppModuleSimulation = AppModule{
   }
   )
   
   type AppModule struct {
       AppModuleBasic
   	keeper     keeper.Keeper
   	bankKeeper group.BankKeeper
   	accKeeper  group.AccountKeeper
   	registry   cdctypes.InterfaceRegistry
   }
   
   / NewAppModule creates a new AppModule object
   func NewAppModule(cdc codec.Codec, keeper keeper.Keeper, ak group.AccountKeeper, bk group.BankKeeper, registry cdctypes.InterfaceRegistry)
   
   AppModule {
       return AppModule{
       AppModuleBasic: AppModuleBasic{
       cdc: cdc, ac: ak.AddressCodec()
   },
   		keeper:         keeper,
   		bankKeeper:     bk,
   		accKeeper:      ak,
   		registry:       registry,
   }
   }
   
   var (
   	_ appmodule.AppModule     = AppModule{
   }
   	_ appmodule.HasEndBlocker = AppModule{
   }
   )
   
   / IsOnePerModuleType implements the depinject.OnePerModuleType interface.
   func (am AppModule)
   
   IsOnePerModuleType() {
   }
   
   / IsAppModule implements the appmodule.AppModule interface.
   func (am AppModule)
   
   IsAppModule() {
   }
   
   type AppModuleBasic struct {
       cdc codec.Codec
   	ac  address.Codec
   }
   
   / Name returns the group module's name.
   func (AppModuleBasic)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / DefaultGenesis returns default genesis state as raw bytes for the group
   / module.
   func (AppModuleBasic)
   
   DefaultGenesis(cdc codec.JSONCodec)
   
   json.RawMessage {
       return cdc.MustMarshalJSON(group.NewGenesisState())
   }
   
   / ValidateGenesis performs genesis state validation for the group module.
   func (AppModuleBasic)
   
   ValidateGenesis(cdc codec.JSONCodec, config sdkclient.TxEncodingConfig, bz json.RawMessage)
   
   error {
       var data group.GenesisState
       if err := cdc.UnmarshalJSON(bz, &data); err != nil {
       return fmt.Errorf("failed to unmarshal %s genesis state: %w", group.ModuleName, err)
   }
   
   return data.Validate()
   }
   
   / GetQueryCmd returns the cli query commands for the group module
   func (a AppModuleBasic)
   
   GetQueryCmd() *cobra.Command {
       return cli.QueryCmd(a.Name())
   }
   
   / GetTxCmd returns the transaction commands for the group module
   func (a AppModuleBasic)
   
   GetTxCmd() *cobra.Command {
       return cli.TxCmd(a.Name(), a.ac)
   }
   
   / RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the group module.
   func (a AppModuleBasic)
   
   RegisterGRPCGatewayRoutes(clientCtx sdkclient.Context, mux *gwruntime.ServeMux) {
       if err := group.RegisterQueryHandlerClient(context.Background(), mux, group.NewQueryClient(clientCtx)); err != nil {
       panic(err)
   }
   }
   
   / RegisterInterfaces registers the group module's interface types
   func (AppModuleBasic)
   
   RegisterInterfaces(registry cdctypes.InterfaceRegistry) {
       group.RegisterInterfaces(registry)
   }
   
   / RegisterLegacyAminoCodec registers the group module's types for the given codec.
   func (AppModuleBasic)
   
   RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
       group.RegisterLegacyAminoCodec(cdc)
   }
   
   / Name returns the group module's name.
   func (AppModule)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / RegisterInvariants does nothing, there are no invariants to enforce
   func (am AppModule)
   
   RegisterInvariants(ir sdk.InvariantRegistry) {
       keeper.RegisterInvariants(ir, am.keeper)
   }
   
   / InitGenesis performs genesis initialization for the group module. It returns
   / no validator updates.
   func (am AppModule)
   
   InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) []abci.ValidatorUpdate {
       am.keeper.InitGenesis(ctx, cdc, data)
   
   return []abci.ValidatorUpdate{
   }
   }
   
   / ExportGenesis returns the exported genesis state as raw bytes for the group
   / module.
   func (am AppModule)
   
   ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec)
   
   json.RawMessage {
       gs := am.keeper.ExportGenesis(ctx, cdc)
   
   return cdc.MustMarshalJSON(gs)
   }
   
   / RegisterServices registers a gRPC query service to respond to the
   / module-specific gRPC queries.
   func (am AppModule)
   
   RegisterServices(cfg module.Configurator) {
       group.RegisterMsgServer(cfg.MsgServer(), am.keeper)
   
   group.RegisterQueryServer(cfg.QueryServer(), am.keeper)
       m := keeper.NewMigrator(am.keeper)
       if err := cfg.RegisterMigration(group.ModuleName, 1, m.Migrate1to2); err != nil {
       panic(fmt.Sprintf("failed to migrate x/%s from version 1 to 2: %v", group.ModuleName, err))
   }
   }
   
   / ConsensusVersion implements AppModule/ConsensusVersion.
   func (AppModule)
   
   ConsensusVersion()
   
   uint64 {
       return ConsensusVersion
   }
   
   / EndBlock implements the group module's EndBlock.
   func (am AppModule)
   
   EndBlock(ctx context.Context)
   
   error {
       c := sdk.UnwrapSDKContext(ctx)
   
   return EndBlocker(c, am.keeper)
   }
   
   / ____________________________________________________________________________
   
   / AppModuleSimulation functions
   
   / GenerateGenesisState creates a randomized GenState of the group module.
   func (AppModule)
   
   GenerateGenesisState(simState *module.SimulationState) {
       simulation.RandomizedGenState(simState)
   }
   
   / RegisterStoreDecoder registers a decoder for group module's types
   func (am AppModule)
   
   RegisterStoreDecoder(sdr simtypes.StoreDecoderRegistry) {
       sdr[group.StoreKey] = simulation.NewDecodeStore(am.cdc)
   }
   
   / WeightedOperations returns the all the gov module operations with their respective weights.
   func (am AppModule)
   
   WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
       return simulation.WeightedOperations(
   		am.registry,
   		simState.AppParams, simState.Cdc, simState.TxConfig,
   		am.accKeeper, am.bankKeeper, am.keeper, am.cdc,
   	)
   }
   
   /
   / App Wiring Setup
   /
   
   func init() {
       appmodule.Register(
   		&modulev1.Module{
   },
   		appmodule.Provide(ProvideModule),
   	)
   }
   
   type GroupInputs struct {
       depinject.In
   
   	Config           *modulev1.Module
   	Key              *store.KVStoreKey
   	Cdc              codec.Codec
   	AccountKeeper    group.AccountKeeper
   	BankKeeper       group.BankKeeper
   	Registry         cdctypes.InterfaceRegistry
   	MsgServiceRouter baseapp.MessageRouter
   }
   
   type GroupOutputs struct {
       depinject.Out
   
   	GroupKeeper keeper.Keeper
   	Module      appmodule.AppModule
   }
   
   func ProvideModule(in GroupInputs)
   
   GroupOutputs {
   	/*
   		Example of setting group params:
   		in.Config.MaxMetadataLen = 1000
   		in.Config.MaxExecutionPeriod = "1209600s"
   	*/
       k := keeper.NewKeeper(in.Key, in.Cdc, in.MsgServiceRouter, in.AccountKeeper, group.Config{
       MaxExecutionPeriod: in.Config.MaxExecutionPeriod.AsDuration(),
       MaxMetadataLen: in.Config.MaxMetadataLen
   })
       m := NewAppModule(in.Cdc, k, in.AccountKeeper, in.BankKeeper, in.Registry)
   
   return GroupOutputs{
       GroupKeeper: k,
       Module: m
   }
   }
   

4. Define the module outputs with a public struct that inherits depinject.Out: The module outputs are the dependencies that the module provides to other modules. It is usually the module itself and its keeper.

   package module
   
   import (
       
   	"context"
       "encoding/json"
       "fmt"
   
   	abci "github.com/cometbft/cometbft/abci/types"
   	gwruntime "github.com/grpc-ecosystem/grpc-gateway/runtime"
       "github.com/spf13/cobra"
   
   	modulev1 "cosmossdk.io/api/cosmos/group/module/v1"
       "cosmossdk.io/core/address"
       "cosmossdk.io/core/appmodule"
       "cosmossdk.io/depinject"
   
   	store "cosmossdk.io/store/types"
       "github.com/cosmos/cosmos-sdk/baseapp"
   	sdkclient "github.com/cosmos/cosmos-sdk/client"
       "github.com/cosmos/cosmos-sdk/codec"
   	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
   	sdk "github.com/cosmos/cosmos-sdk/types"
       "github.com/cosmos/cosmos-sdk/types/module"
   	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
       "github.com/cosmos/cosmos-sdk/x/group"
       "github.com/cosmos/cosmos-sdk/x/group/client/cli"
       "github.com/cosmos/cosmos-sdk/x/group/keeper"
       "github.com/cosmos/cosmos-sdk/x/group/simulation"
   )
   
   / ConsensusVersion defines the current x/group module consensus version.
   const ConsensusVersion = 2
   
   var (
   	_ module.AppModuleBasic      = AppModuleBasic{
   }
   	_ module.AppModuleSimulation = AppModule{
   }
   )
   
   type AppModule struct {
       AppModuleBasic
   	keeper     keeper.Keeper
   	bankKeeper group.BankKeeper
   	accKeeper  group.AccountKeeper
   	registry   cdctypes.InterfaceRegistry
   }
   
   / NewAppModule creates a new AppModule object
   func NewAppModule(cdc codec.Codec, keeper keeper.Keeper, ak group.AccountKeeper, bk group.BankKeeper, registry cdctypes.InterfaceRegistry)
   
   AppModule {
       return AppModule{
       AppModuleBasic: AppModuleBasic{
       cdc: cdc, ac: ak.AddressCodec()
   },
   		keeper:         keeper,
   		bankKeeper:     bk,
   		accKeeper:      ak,
   		registry:       registry,
   }
   }
   
   var (
   	_ appmodule.AppModule     = AppModule{
   }
   	_ appmodule.HasEndBlocker = AppModule{
   }
   )
   
   / IsOnePerModuleType implements the depinject.OnePerModuleType interface.
   func (am AppModule)
   
   IsOnePerModuleType() {
   }
   
   / IsAppModule implements the appmodule.AppModule interface.
   func (am AppModule)
   
   IsAppModule() {
   }
   
   type AppModuleBasic struct {
       cdc codec.Codec
   	ac  address.Codec
   }
   
   / Name returns the group module's name.
   func (AppModuleBasic)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / DefaultGenesis returns default genesis state as raw bytes for the group
   / module.
   func (AppModuleBasic)
   
   DefaultGenesis(cdc codec.JSONCodec)
   
   json.RawMessage {
       return cdc.MustMarshalJSON(group.NewGenesisState())
   }
   
   / ValidateGenesis performs genesis state validation for the group module.
   func (AppModuleBasic)
   
   ValidateGenesis(cdc codec.JSONCodec, config sdkclient.TxEncodingConfig, bz json.RawMessage)
   
   error {
       var data group.GenesisState
       if err := cdc.UnmarshalJSON(bz, &data); err != nil {
       return fmt.Errorf("failed to unmarshal %s genesis state: %w", group.ModuleName, err)
   }
   
   return data.Validate()
   }
   
   / GetQueryCmd returns the cli query commands for the group module
   func (a AppModuleBasic)
   
   GetQueryCmd() *cobra.Command {
       return cli.QueryCmd(a.Name())
   }
   
   / GetTxCmd returns the transaction commands for the group module
   func (a AppModuleBasic)
   
   GetTxCmd() *cobra.Command {
       return cli.TxCmd(a.Name(), a.ac)
   }
   
   / RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the group module.
   func (a AppModuleBasic)
   
   RegisterGRPCGatewayRoutes(clientCtx sdkclient.Context, mux *gwruntime.ServeMux) {
       if err := group.RegisterQueryHandlerClient(context.Background(), mux, group.NewQueryClient(clientCtx)); err != nil {
       panic(err)
   }
   }
   
   / RegisterInterfaces registers the group module's interface types
   func (AppModuleBasic)
   
   RegisterInterfaces(registry cdctypes.InterfaceRegistry) {
       group.RegisterInterfaces(registry)
   }
   
   / RegisterLegacyAminoCodec registers the group module's types for the given codec.
   func (AppModuleBasic)
   
   RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
       group.RegisterLegacyAminoCodec(cdc)
   }
   
   / Name returns the group module's name.
   func (AppModule)
   
   Name()
   
   string {
       return group.ModuleName
   }
   
   / RegisterInvariants does nothing, there are no invariants to enforce
   func (am AppModule)
   
   RegisterInvariants(ir sdk.InvariantRegistry) {
       keeper.RegisterInvariants(ir, am.keeper)
   }
   
   / InitGenesis performs genesis initialization for the group module. It returns
   / no validator updates.
   func (am AppModule)
   
   InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) []abci.ValidatorUpdate {
       am.keeper.InitGenesis(ctx, cdc, data)
   
   return []abci.ValidatorUpdate{
   }
   }
   
   / ExportGenesis returns the exported genesis state as raw bytes for the group
   / module.
   func (am AppModule)
   
   ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec)
   
   json.RawMessage {
       gs := am.keeper.ExportGenesis(ctx, cdc)
   
   return cdc.MustMarshalJSON(gs)
   }
   
   / RegisterServices registers a gRPC query service to respond to the
   / module-specific gRPC queries.
   func (am AppModule)
   
   RegisterServices(cfg module.Configurator) {
       group.RegisterMsgServer(cfg.MsgServer(), am.keeper)
   
   group.RegisterQueryServer(cfg.QueryServer(), am.keeper)
       m := keeper.NewMigrator(am.keeper)
       if err := cfg.RegisterMigration(group.ModuleName, 1, m.Migrate1to2); err != nil {
       panic(fmt.Sprintf("failed to migrate x/%s from version 1 to 2: %v", group.ModuleName, err))
   }
   }
   
   / ConsensusVersion implements AppModule/ConsensusVersion.
   func (AppModule)
   
   ConsensusVersion()
   
   uint64 {
       return ConsensusVersion
   }
   
   / EndBlock implements the group module's EndBlock.
   func (am AppModule)
   
   EndBlock(ctx context.Context)
   
   error {
       c := sdk.UnwrapSDKContext(ctx)
   
   return EndBlocker(c, am.keeper)
   }
   
   / ____________________________________________________________________________
   
   / AppModuleSimulation functions
   
   / GenerateGenesisState creates a randomized GenState of the group module.
   func (AppModule)
   
   GenerateGenesisState(simState *module.SimulationState) {
       simulation.RandomizedGenState(simState)
   }
   
   / RegisterStoreDecoder registers a decoder for group module's types
   func (am AppModule)
   
   RegisterStoreDecoder(sdr simtypes.StoreDecoderRegistry) {
       sdr[group.StoreKey] = simulation.NewDecodeStore(am.cdc)
   }
   
   / WeightedOperations returns the all the gov module operations with their respective weights.
   func (am AppModule)
   
   WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
       return simulation.WeightedOperations(
   		am.registry,
   		simState.AppParams, simState.Cdc, simState.TxConfig,
   		am.accKeeper, am.bankKeeper, am.keeper, am.cdc,
   	)
   }
   
   /
   / App Wiring Setup
   /
   
   func init() {
       appmodule.Register(
   		&modulev1.Module{
   },
   		appmodule.Provide(ProvideModule),
   	)
   }
   
   type GroupInputs struct {
       depinject.In
   
   	Config           *modulev1.Module
   	Key              *store.KVStoreKey
   	Cdc              codec.Codec
   	AccountKeeper    group.AccountKeeper
   	BankKeeper       group.BankKeeper
   	Registry         cdctypes.InterfaceRegistry
   	MsgServiceRouter baseapp.MessageRouter
   }
   
   type GroupOutputs struct {
       depinject.Out
   
   	GroupKeeper keeper.Keeper
   	Module      appmodule.AppModule
   }
   
   func ProvideModule(in GroupInputs)
   
   GroupOutputs {
   	/*
   		Example of setting group params:
   		in.Config.MaxMetadataLen = 1000
   		in.Config.MaxExecutionPeriod = "1209600s"
   	*/
       k := keeper.NewKeeper(in.Key, in.Cdc, in.MsgServiceRouter, in.AccountKeeper, group.Config{
       MaxExecutionPeriod: in.Config.MaxExecutionPeriod.AsDuration(),
       MaxMetadataLen: in.Config.MaxMetadataLen
   })
       m := NewAppModule(in.Cdc, k, in.AccountKeeper, in.BankKeeper, in.Registry)
   
   return GroupOutputs{
       GroupKeeper: k,
       Module: m
   }
   }
   

5. Create a function named ProvideModule (as called in 1.) and use the inputs for instantiating the module outputs.

package module

import (
    
	"context"
    "encoding/json"
    "fmt"

	abci "github.com/cometbft/cometbft/abci/types"
	gwruntime "github.com/grpc-ecosystem/grpc-gateway/runtime"
    "github.com/spf13/cobra"

	modulev1 "cosmossdk.io/api/cosmos/group/module/v1"
    "cosmossdk.io/core/address"
    "cosmossdk.io/core/appmodule"
    "cosmossdk.io/depinject"

	store "cosmossdk.io/store/types"
    "github.com/cosmos/cosmos-sdk/baseapp"
	sdkclient "github.com/cosmos/cosmos-sdk/client"
    "github.com/cosmos/cosmos-sdk/codec"
	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
	sdk "github.com/cosmos/cosmos-sdk/types"
    "github.com/cosmos/cosmos-sdk/types/module"
	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
    "github.com/cosmos/cosmos-sdk/x/group"
    "github.com/cosmos/cosmos-sdk/x/group/client/cli"
    "github.com/cosmos/cosmos-sdk/x/group/keeper"
    "github.com/cosmos/cosmos-sdk/x/group/simulation"
)

/ ConsensusVersion defines the current x/group module consensus version.
const ConsensusVersion = 2

var (
	_ module.AppModuleBasic      = AppModuleBasic{
}
	_ module.AppModuleSimulation = AppModule{
}
)

type AppModule struct {
    AppModuleBasic
	keeper     keeper.Keeper
	bankKeeper group.BankKeeper
	accKeeper  group.AccountKeeper
	registry   cdctypes.InterfaceRegistry
}

/ NewAppModule creates a new AppModule object
func NewAppModule(cdc codec.Codec, keeper keeper.Keeper, ak group.AccountKeeper, bk group.BankKeeper, registry cdctypes.InterfaceRegistry)

AppModule {
    return AppModule{
    AppModuleBasic: AppModuleBasic{
    cdc: cdc, ac: ak.AddressCodec()
},
		keeper:         keeper,
		bankKeeper:     bk,
		accKeeper:      ak,
		registry:       registry,
}
}

var (
	_ appmodule.AppModule     = AppModule{
}
	_ appmodule.HasEndBlocker = AppModule{
}
)

/ IsOnePerModuleType implements the depinject.OnePerModuleType interface.
func (am AppModule)

IsOnePerModuleType() {
}

/ IsAppModule implements the appmodule.AppModule interface.
func (am AppModule)

IsAppModule() {
}

type AppModuleBasic struct {
    cdc codec.Codec
	ac  address.Codec
}

/ Name returns the group module's name.
func (AppModuleBasic)

Name()

string {
    return group.ModuleName
}

/ DefaultGenesis returns default genesis state as raw bytes for the group
/ module.
func (AppModuleBasic)

DefaultGenesis(cdc codec.JSONCodec)

json.RawMessage {
    return cdc.MustMarshalJSON(group.NewGenesisState())
}

/ ValidateGenesis performs genesis state validation for the group module.
func (AppModuleBasic)

ValidateGenesis(cdc codec.JSONCodec, config sdkclient.TxEncodingConfig, bz json.RawMessage)

error {
    var data group.GenesisState
    if err := cdc.UnmarshalJSON(bz, &data); err != nil {
    return fmt.Errorf("failed to unmarshal %s genesis state: %w", group.ModuleName, err)
}

return data.Validate()
}

/ GetQueryCmd returns the cli query commands for the group module
func (a AppModuleBasic)

GetQueryCmd() *cobra.Command {
    return cli.QueryCmd(a.Name())
}

/ GetTxCmd returns the transaction commands for the group module
func (a AppModuleBasic)

GetTxCmd() *cobra.Command {
    return cli.TxCmd(a.Name(), a.ac)
}

/ RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the group module.
func (a AppModuleBasic)

RegisterGRPCGatewayRoutes(clientCtx sdkclient.Context, mux *gwruntime.ServeMux) {
    if err := group.RegisterQueryHandlerClient(context.Background(), mux, group.NewQueryClient(clientCtx)); err != nil {
    panic(err)
}
}

/ RegisterInterfaces registers the group module's interface types
func (AppModuleBasic)

RegisterInterfaces(registry cdctypes.InterfaceRegistry) {
    group.RegisterInterfaces(registry)
}

/ RegisterLegacyAminoCodec registers the group module's types for the given codec.
func (AppModuleBasic)

RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
    group.RegisterLegacyAminoCodec(cdc)
}

/ Name returns the group module's name.
func (AppModule)

Name()

string {
    return group.ModuleName
}

/ RegisterInvariants does nothing, there are no invariants to enforce
func (am AppModule)

RegisterInvariants(ir sdk.InvariantRegistry) {
    keeper.RegisterInvariants(ir, am.keeper)
}

/ InitGenesis performs genesis initialization for the group module. It returns
/ no validator updates.
func (am AppModule)

InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) []abci.ValidatorUpdate {
    am.keeper.InitGenesis(ctx, cdc, data)

return []abci.ValidatorUpdate{
}
}

/ ExportGenesis returns the exported genesis state as raw bytes for the group
/ module.
func (am AppModule)

ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec)

json.RawMessage {
    gs := am.keeper.ExportGenesis(ctx, cdc)

return cdc.MustMarshalJSON(gs)
}

/ RegisterServices registers a gRPC query service to respond to the
/ module-specific gRPC queries.
func (am AppModule)

RegisterServices(cfg module.Configurator) {
    group.RegisterMsgServer(cfg.MsgServer(), am.keeper)

group.RegisterQueryServer(cfg.QueryServer(), am.keeper)
    m := keeper.NewMigrator(am.keeper)
    if err := cfg.RegisterMigration(group.ModuleName, 1, m.Migrate1to2); err != nil {
    panic(fmt.Sprintf("failed to migrate x/%s from version 1 to 2: %v", group.ModuleName, err))
}
}

/ ConsensusVersion implements AppModule/ConsensusVersion.
func (AppModule)

ConsensusVersion()

uint64 {
    return ConsensusVersion
}

/ EndBlock implements the group module's EndBlock.
func (am AppModule)

EndBlock(ctx context.Context)

error {
    c := sdk.UnwrapSDKContext(ctx)

return EndBlocker(c, am.keeper)
}

/ ____________________________________________________________________________

/ AppModuleSimulation functions

/ GenerateGenesisState creates a randomized GenState of the group module.
func (AppModule)

GenerateGenesisState(simState *module.SimulationState) {
    simulation.RandomizedGenState(simState)
}

/ RegisterStoreDecoder registers a decoder for group module's types
func (am AppModule)

RegisterStoreDecoder(sdr simtypes.StoreDecoderRegistry) {
    sdr[group.StoreKey] = simulation.NewDecodeStore(am.cdc)
}

/ WeightedOperations returns the all the gov module operations with their respective weights.
func (am AppModule)

WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
    return simulation.WeightedOperations(
		am.registry,
		simState.AppParams, simState.Cdc, simState.TxConfig,
		am.accKeeper, am.bankKeeper, am.keeper, am.cdc,
	)
}

/
/ App Wiring Setup
/

func init() {
    appmodule.Register(
		&modulev1.Module{
},
		appmodule.Provide(ProvideModule),
	)
}

type GroupInputs struct {
    depinject.In

	Config           *modulev1.Module
	Key              *store.KVStoreKey
	Cdc              codec.Codec
	AccountKeeper    group.AccountKeeper
	BankKeeper       group.BankKeeper
	Registry         cdctypes.InterfaceRegistry
	MsgServiceRouter baseapp.MessageRouter
}

type GroupOutputs struct {
    depinject.Out

	GroupKeeper keeper.Keeper
	Module      appmodule.AppModule
}

func ProvideModule(in GroupInputs)

GroupOutputs {
	/*
		Example of setting group params:
		in.Config.MaxMetadataLen = 1000
		in.Config.MaxExecutionPeriod = "1209600s"
	*/
    k := keeper.NewKeeper(in.Key, in.Cdc, in.MsgServiceRouter, in.AccountKeeper, group.Config{
    MaxExecutionPeriod: in.Config.MaxExecutionPeriod.AsDuration(),
    MaxMetadataLen: in.Config.MaxMetadataLen
})
    m := NewAppModule(in.Cdc, k, in.AccountKeeper, in.BankKeeper, in.Registry)

return GroupOutputs{
    GroupKeeper: k,
    Module: m
}
}

The ProvideModule function should return an instance of cosmossdk.io/core/appmodule.AppModule which implements one or more app module extension interfaces for initializing the module.

Following is the complete app wiring configuration for group:

package module

import (
    
	"context"
    "encoding/json"
    "fmt"

	abci "github.com/cometbft/cometbft/abci/types"
	gwruntime "github.com/grpc-ecosystem/grpc-gateway/runtime"
    "github.com/spf13/cobra"

	modulev1 "cosmossdk.io/api/cosmos/group/module/v1"
    "cosmossdk.io/core/address"
    "cosmossdk.io/core/appmodule"
    "cosmossdk.io/depinject"

	store "cosmossdk.io/store/types"
    "github.com/cosmos/cosmos-sdk/baseapp"
	sdkclient "github.com/cosmos/cosmos-sdk/client"
    "github.com/cosmos/cosmos-sdk/codec"
	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
	sdk "github.com/cosmos/cosmos-sdk/types"
    "github.com/cosmos/cosmos-sdk/types/module"
	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
    "github.com/cosmos/cosmos-sdk/x/group"
    "github.com/cosmos/cosmos-sdk/x/group/client/cli"
    "github.com/cosmos/cosmos-sdk/x/group/keeper"
    "github.com/cosmos/cosmos-sdk/x/group/simulation"
)

/ ConsensusVersion defines the current x/group module consensus version.
const ConsensusVersion = 2

var (
	_ module.AppModuleBasic      = AppModuleBasic{
}
	_ module.AppModuleSimulation = AppModule{
}
)

type AppModule struct {
    AppModuleBasic
	keeper     keeper.Keeper
	bankKeeper group.BankKeeper
	accKeeper  group.AccountKeeper
	registry   cdctypes.InterfaceRegistry
}

/ NewAppModule creates a new AppModule object
func NewAppModule(cdc codec.Codec, keeper keeper.Keeper, ak group.AccountKeeper, bk group.BankKeeper, registry cdctypes.InterfaceRegistry)

AppModule {
    return AppModule{
    AppModuleBasic: AppModuleBasic{
    cdc: cdc, ac: ak.AddressCodec()
},
		keeper:         keeper,
		bankKeeper:     bk,
		accKeeper:      ak,
		registry:       registry,
}
}

var (
	_ appmodule.AppModule     = AppModule{
}
	_ appmodule.HasEndBlocker = AppModule{
}
)

/ IsOnePerModuleType implements the depinject.OnePerModuleType interface.
func (am AppModule)

IsOnePerModuleType() {
}

/ IsAppModule implements the appmodule.AppModule interface.
func (am AppModule)

IsAppModule() {
}

type AppModuleBasic struct {
    cdc codec.Codec
	ac  address.Codec
}

/ Name returns the group module's name.
func (AppModuleBasic)

Name()

string {
    return group.ModuleName
}

/ DefaultGenesis returns default genesis state as raw bytes for the group
/ module.
func (AppModuleBasic)

DefaultGenesis(cdc codec.JSONCodec)

json.RawMessage {
    return cdc.MustMarshalJSON(group.NewGenesisState())
}

/ ValidateGenesis performs genesis state validation for the group module.
func (AppModuleBasic)

ValidateGenesis(cdc codec.JSONCodec, config sdkclient.TxEncodingConfig, bz json.RawMessage)

error {
    var data group.GenesisState
    if err := cdc.UnmarshalJSON(bz, &data); err != nil {
    return fmt.Errorf("failed to unmarshal %s genesis state: %w", group.ModuleName, err)
}

return data.Validate()
}

/ GetQueryCmd returns the cli query commands for the group module
func (a AppModuleBasic)

GetQueryCmd() *cobra.Command {
    return cli.QueryCmd(a.Name())
}

/ GetTxCmd returns the transaction commands for the group module
func (a AppModuleBasic)

GetTxCmd() *cobra.Command {
    return cli.TxCmd(a.Name(), a.ac)
}

/ RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the group module.
func (a AppModuleBasic)

RegisterGRPCGatewayRoutes(clientCtx sdkclient.Context, mux *gwruntime.ServeMux) {
    if err := group.RegisterQueryHandlerClient(context.Background(), mux, group.NewQueryClient(clientCtx)); err != nil {
    panic(err)
}
}

/ RegisterInterfaces registers the group module's interface types
func (AppModuleBasic)

RegisterInterfaces(registry cdctypes.InterfaceRegistry) {
    group.RegisterInterfaces(registry)
}

/ RegisterLegacyAminoCodec registers the group module's types for the given codec.
func (AppModuleBasic)

RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
    group.RegisterLegacyAminoCodec(cdc)
}

/ Name returns the group module's name.
func (AppModule)

Name()

string {
    return group.ModuleName
}

/ RegisterInvariants does nothing, there are no invariants to enforce
func (am AppModule)

RegisterInvariants(ir sdk.InvariantRegistry) {
    keeper.RegisterInvariants(ir, am.keeper)
}

/ InitGenesis performs genesis initialization for the group module. It returns
/ no validator updates.
func (am AppModule)

InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) []abci.ValidatorUpdate {
    am.keeper.InitGenesis(ctx, cdc, data)

return []abci.ValidatorUpdate{
}
}

/ ExportGenesis returns the exported genesis state as raw bytes for the group
/ module.
func (am AppModule)

ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec)

json.RawMessage {
    gs := am.keeper.ExportGenesis(ctx, cdc)

return cdc.MustMarshalJSON(gs)
}

/ RegisterServices registers a gRPC query service to respond to the
/ module-specific gRPC queries.
func (am AppModule)

RegisterServices(cfg module.Configurator) {
    group.RegisterMsgServer(cfg.MsgServer(), am.keeper)

group.RegisterQueryServer(cfg.QueryServer(), am.keeper)
    m := keeper.NewMigrator(am.keeper)
    if err := cfg.RegisterMigration(group.ModuleName, 1, m.Migrate1to2); err != nil {
    panic(fmt.Sprintf("failed to migrate x/%s from version 1 to 2: %v", group.ModuleName, err))
}
}

/ ConsensusVersion implements AppModule/ConsensusVersion.
func (AppModule)

ConsensusVersion()

uint64 {
    return ConsensusVersion
}

/ EndBlock implements the group module's EndBlock.
func (am AppModule)

EndBlock(ctx context.Context)

error {
    c := sdk.UnwrapSDKContext(ctx)

return EndBlocker(c, am.keeper)
}

/ ____________________________________________________________________________

/ AppModuleSimulation functions

/ GenerateGenesisState creates a randomized GenState of the group module.
func (AppModule)

GenerateGenesisState(simState *module.SimulationState) {
    simulation.RandomizedGenState(simState)
}

/ RegisterStoreDecoder registers a decoder for group module's types
func (am AppModule)

RegisterStoreDecoder(sdr simtypes.StoreDecoderRegistry) {
    sdr[group.StoreKey] = simulation.NewDecodeStore(am.cdc)
}

/ WeightedOperations returns the all the gov module operations with their respective weights.
func (am AppModule)

WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
    return simulation.WeightedOperations(
		am.registry,
		simState.AppParams, simState.Cdc, simState.TxConfig,
		am.accKeeper, am.bankKeeper, am.keeper, am.cdc,
	)
}

/
/ App Wiring Setup
/

func init() {
    appmodule.Register(
		&modulev1.Module{
},
		appmodule.Provide(ProvideModule),
	)
}

type GroupInputs struct {
    depinject.In

	Config           *modulev1.Module
	Key              *store.KVStoreKey
	Cdc              codec.Codec
	AccountKeeper    group.AccountKeeper
	BankKeeper       group.BankKeeper
	Registry         cdctypes.InterfaceRegistry
	MsgServiceRouter baseapp.MessageRouter
}

type GroupOutputs struct {
    depinject.Out

	GroupKeeper keeper.Keeper
	Module      appmodule.AppModule
}

func ProvideModule(in GroupInputs)

GroupOutputs {
	/*
		Example of setting group params:
		in.Config.MaxMetadataLen = 1000
		in.Config.MaxExecutionPeriod = "1209600s"
	*/
    k := keeper.NewKeeper(in.Key, in.Cdc, in.MsgServiceRouter, in.AccountKeeper, group.Config{
    MaxExecutionPeriod: in.Config.MaxExecutionPeriod.AsDuration(),
    MaxMetadataLen: in.Config.MaxMetadataLen
})
    m := NewAppModule(in.Cdc, k, in.AccountKeeper, in.BankKeeper, in.Registry)

return GroupOutputs{
    GroupKeeper: k,
    Module: m
}
}

The module is now ready to be used with depinject by a chain developer.

Integrate in an application

The App Wiring is done in app_config.go / app.yaml and app_v2.go and is explained in detail in the overview of app_v2.go.