exported

type Acknowledgement interface {
	Success() bool
	Acknowledgement() []byte
}

type ChannelI interface {
	GetState() int32
	GetOrdering() int32
	GetCounterparty() CounterpartyChannelI
	GetConnectionHops() []string
	GetVersion() string
	ValidateBasic() error
}

type ClientMessage interface {
	proto.Message

	ClientType() string
	ValidateBasic() error
}

type ClientState interface {
	proto.Message

	ClientType() string
	GetLatestHeight() Height
	Validate() error

	// Status must return the status of the client. Only Active clients are allowed to process packets.
	Status(ctx sdk.Context, clientStore sdk.KVStore, cdc codec.BinaryCodec) Status

	// ExportMetadata must export metadata stored within the clientStore for genesis export
	ExportMetadata(clientStore sdk.KVStore) []GenesisMetadata

	// ZeroCustomFields zeroes out any client customizable fields in client state
	// Ledger enforced fields are maintained while all custom fields are zero values
	// Used to verify upgrades
	ZeroCustomFields() ClientState

	// GetTimestampAtHeight must return the timestamp for the consensus state associated with the provided height.
	GetTimestampAtHeight(
		ctx sdk.Context,
		clientStore sdk.KVStore,
		cdc codec.BinaryCodec,
		height Height,
	) (uint64, error)

	// Initialize is called upon client creation, it allows the client to perform validation on the initial consensus state and set the
	// client state, consensus state and any client-specific metadata necessary for correct light client operation in the provided client store.
	Initialize(ctx sdk.Context, cdc codec.BinaryCodec, clientStore sdk.KVStore, consensusState ConsensusState) error

	// VerifyMembership is a generic proof verification method which verifies a proof of the existence of a value at a given CommitmentPath at the specified height.
	// The caller is expected to construct the full CommitmentPath from a CommitmentPrefix and a standardized path (as defined in ICS 24).
	VerifyMembership(
		ctx sdk.Context,
		clientStore sdk.KVStore,
		cdc codec.BinaryCodec,
		height Height,
		delayTimePeriod uint64,
		delayBlockPeriod uint64,
		proof []byte,
		path Path,
		value []byte,
	) error

	// VerifyNonMembership is a generic proof verification method which verifies the absence of a given CommitmentPath at a specified height.
	// The caller is expected to construct the full CommitmentPath from a CommitmentPrefix and a standardized path (as defined in ICS 24).
	VerifyNonMembership(
		ctx sdk.Context,
		clientStore sdk.KVStore,
		cdc codec.BinaryCodec,
		height Height,
		delayTimePeriod uint64,
		delayBlockPeriod uint64,
		proof []byte,
		path Path,
	) error

	// VerifyClientMessage must verify a ClientMessage. A ClientMessage could be a Header, Misbehaviour, or batch update.
	// It must handle each type of ClientMessage appropriately. Calls to CheckForMisbehaviour, UpdateState, and UpdateStateOnMisbehaviour
	// will assume that the content of the ClientMessage has been verified and can be trusted. An error should be returned
	// if the ClientMessage fails to verify.
	VerifyClientMessage(ctx sdk.Context, cdc codec.BinaryCodec, clientStore sdk.KVStore, clientMsg ClientMessage) error

	// Checks for evidence of a misbehaviour in Header or Misbehaviour type. It assumes the ClientMessage
	// has already been verified.
	CheckForMisbehaviour(ctx sdk.Context, cdc codec.BinaryCodec, clientStore sdk.KVStore, clientMsg ClientMessage) bool

	// UpdateStateOnMisbehaviour should perform appropriate state changes on a client state given that misbehaviour has been detected and verified
	UpdateStateOnMisbehaviour(ctx sdk.Context, cdc codec.BinaryCodec, clientStore sdk.KVStore, clientMsg ClientMessage)

	// UpdateState updates and stores as necessary any associated information for an IBC client, such as the ClientState and corresponding ConsensusState.
	// Upon successful update, a list of consensus heights is returned. It assumes the ClientMessage has already been verified.
	UpdateState(ctx sdk.Context, cdc codec.BinaryCodec, clientStore sdk.KVStore, clientMsg ClientMessage) []Height

	// CheckSubstituteAndUpdateState must verify that the provided substitute may be used to update the subject client.
	// The light client must set the updated client and consensus states within the clientStore for the subject client.
	CheckSubstituteAndUpdateState(ctx sdk.Context, cdc codec.BinaryCodec, subjectClientStore, substituteClientStore sdk.KVStore, substituteClient ClientState) error

	// Upgrade functions
	// NOTE: proof heights are not included as upgrade to a new revision is expected to pass only on the last
	// height committed by the current revision. Clients are responsible for ensuring that the planned last
	// height of the current revision is somehow encoded in the proof verification process.
	// This is to ensure that no premature upgrades occur, since upgrade plans committed to by the counterparty
	// may be cancelled or modified before the last planned height.
	// If the upgrade is verified, the upgraded client and consensus states must be set in the client store.
	VerifyUpgradeAndUpdateState(
		ctx sdk.Context,
		cdc codec.BinaryCodec,
		store sdk.KVStore,
		newClient ClientState,
		newConsState ConsensusState,
		proofUpgradeClient,
		proofUpgradeConsState []byte,
	) error
}

type ConnectionI interface {
	GetClientID() string
	GetState() int32
	GetCounterparty() CounterpartyConnectionI
	GetDelayPeriod() uint64
	ValidateBasic() error
}

type ConsensusState interface {
	proto.Message

	ClientType() string // Consensus kind

	// GetTimestamp returns the timestamp (in nanoseconds) of the consensus state
	GetTimestamp() uint64

	ValidateBasic() error
}

type CounterpartyChannelI interface {
	GetPortID() string
	GetChannelID() string
	ValidateBasic() error
}

type CounterpartyConnectionI interface {
	GetClientID() string
	GetConnectionID() string
	GetPrefix() Prefix
	ValidateBasic() error
}

type GenesisMetadata interface {
	// return store key that contains metadata without clientID-prefix
	GetKey() []byte
	// returns metadata value
	GetValue() []byte
}

type Height interface {
	IsZero() bool
	LT(Height) bool
	LTE(Height) bool
	EQ(Height) bool
	GT(Height) bool
	GTE(Height) bool
	GetRevisionNumber() uint64
	GetRevisionHeight() uint64
	Increment() Height
	Decrement() (Height, bool)
	String() string
}

type PacketI interface {
	GetSequence() uint64
	GetTimeoutHeight() Height
	GetTimeoutTimestamp() uint64
	GetSourcePort() string
	GetSourceChannel() string
	GetDestPort() string
	GetDestChannel() string
	GetData() []byte
	ValidateBasic() error
}

type Path interface {
	String() string
	Empty() bool
}

type Prefix interface {
	Bytes() []byte
	Empty() bool
}

type Proof interface {
	VerifyMembership([]*ics23.ProofSpec, Root, Path, []byte) error
	VerifyNonMembership([]*ics23.ProofSpec, Root, Path) error
	Empty() bool

	ValidateBasic() error
}

type Root interface {
	GetHash() []byte
	Empty() bool
}

type ScopedKeeper interface {
	NewCapability(ctx sdk.Context, name string) (*capabilitytypes.Capability, error)
	GetCapability(ctx sdk.Context, name string) (*capabilitytypes.Capability, bool)
	AuthenticateCapability(ctx sdk.Context, cap *capabilitytypes.Capability, name string) bool
	LookupModules(ctx sdk.Context, name string) ([]string, *capabilitytypes.Capability, error)
	ClaimCapability(ctx sdk.Context, cap *capabilitytypes.Capability, name string) error
}

type Status string

type Version interface {
	GetIdentifier() string
	GetFeatures() []string
	VerifyProposedVersion(Version) error
}