Rename all methods IsEmpty to Empty to be consistent with all codebase (

#6409)

Co-authored-by: Alessio Treglia <alessio@tendermint.com>

CHANGELOG.md

@@ -61,6 +61,7 @@ older clients.
 
 ### API Breaking Changes
 
+* [\#6409](https://github.com/cosmos/cosmos-sdk/pull/6409) Rename all IsEmpty methods to Empty across the codebase and enforce consistency.
 * [\#6231](https://github.com/cosmos/cosmos-sdk/pull/6231) Simplify `AppModule` interface, `Route` and `NewHandler` methods become only `Route`
 and returns a new `Route` type.
 * [\#6212](https://github.com/cosmos/cosmos-sdk/pull/6212) Remove `Get*` prefixes from key construction functions

x/gov/types/genesis.go

@@ -48,8 +48,8 @@ func (data GenesisState) Equal(other GenesisState) bool {
 		data.VotingParams.Equal(other.VotingParams)
 }
 
-// IsEmpty returns true if a GenesisState is empty
-func (data GenesisState) IsEmpty() bool {
+// Empty returns true if a GenesisState is empty
+func (data GenesisState) Empty() bool {
 	return data.Equal(GenesisState{})
 }
 

x/ibc/03-connection/types/connection.go

@@ -103,7 +103,7 @@ func (c Counterparty) ValidateBasic() error {
 	if err := host.ClientIdentifierValidator(c.ClientID); err != nil {
 		return sdkerrors.Wrap(err, "invalid counterparty client ID")
 	}
-	if c.Prefix.IsEmpty() {
+	if c.Prefix.Empty() {
 		return sdkerrors.Wrap(ErrInvalidCounterparty, "counterparty prefix cannot be empty")
 	}
 	return nil

x/ibc/03-connection/types/msgs.go

@@ -109,7 +109,7 @@ func (msg MsgConnectionOpenTry) ValidateBasic() error {
 			return sdkerrors.Wrap(sdkerrors.ErrInvalidVersion, "version can't be blank")
 		}
 	}
-	if msg.ProofInit.IsEmpty() || msg.ProofConsensus.IsEmpty() {
+	if msg.ProofInit.Empty() || msg.ProofConsensus.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.ProofInit.ValidateBasic(); err != nil {
@@ -177,7 +177,7 @@ func (msg MsgConnectionOpenAck) ValidateBasic() error {
 	if strings.TrimSpace(msg.Version) == "" {
 		return sdkerrors.Wrap(sdkerrors.ErrInvalidVersion, "version can't be blank")
 	}
-	if msg.ProofTry.IsEmpty() || msg.ProofConsensus.IsEmpty() {
+	if msg.ProofTry.Empty() || msg.ProofConsensus.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.ProofTry.ValidateBasic(); err != nil {
@@ -238,7 +238,7 @@ func (msg MsgConnectionOpenConfirm) ValidateBasic() error {
 	if err := host.ConnectionIdentifierValidator(msg.ConnectionID); err != nil {
 		return sdkerrors.Wrap(err, "invalid connection ID")
 	}
-	if msg.ProofAck.IsEmpty() {
+	if msg.ProofAck.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.ProofAck.ValidateBasic(); err != nil {

x/ibc/04-channel/types/msgs.go

@@ -101,7 +101,7 @@ func (msg MsgChannelOpenTry) ValidateBasic() error {
 	if strings.TrimSpace(msg.CounterpartyVersion) == "" {
 		return sdkerrors.Wrap(ErrInvalidCounterparty, "counterparty version cannot be blank")
 	}
-	if msg.ProofInit.IsEmpty() {
+	if msg.ProofInit.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.ProofInit.ValidateBasic(); err != nil {
@@ -162,7 +162,7 @@ func (msg MsgChannelOpenAck) ValidateBasic() error {
 	if strings.TrimSpace(msg.CounterpartyVersion) == "" {
 		return sdkerrors.Wrap(ErrInvalidCounterparty, "counterparty version cannot be blank")
 	}
-	if msg.ProofTry.IsEmpty() {
+	if msg.ProofTry.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.ProofTry.ValidateBasic(); err != nil {
@@ -219,7 +219,7 @@ func (msg MsgChannelOpenConfirm) ValidateBasic() error {
 	if err := host.ChannelIdentifierValidator(msg.ChannelID); err != nil {
 		return sdkerrors.Wrap(err, "invalid channel ID")
 	}
-	if msg.ProofAck.IsEmpty() {
+	if msg.ProofAck.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.ProofAck.ValidateBasic(); err != nil {
@@ -321,7 +321,7 @@ func (msg MsgChannelCloseConfirm) ValidateBasic() error {
 	if err := host.ChannelIdentifierValidator(msg.ChannelID); err != nil {
 		return sdkerrors.Wrap(err, "invalid channel ID")
 	}
-	if msg.ProofInit.IsEmpty() {
+	if msg.ProofInit.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.ProofInit.ValidateBasic(); err != nil {
@@ -366,7 +366,7 @@ func (msg MsgPacket) Route() string {
 
 // ValidateBasic implements sdk.Msg
 func (msg MsgPacket) ValidateBasic() error {
-	if msg.Proof.IsEmpty() {
+	if msg.Proof.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.Proof.ValidateBasic(); err != nil {
@@ -427,7 +427,7 @@ func (msg MsgTimeout) Route() string {
 
 // ValidateBasic implements sdk.Msg
 func (msg MsgTimeout) ValidateBasic() error {
-	if msg.Proof.IsEmpty() {
+	if msg.Proof.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.Proof.ValidateBasic(); err != nil {
@@ -479,7 +479,7 @@ func (msg MsgAcknowledgement) Route() string {
 
 // ValidateBasic implements sdk.Msg
 func (msg MsgAcknowledgement) ValidateBasic() error {
-	if msg.Proof.IsEmpty() {
+	if msg.Proof.Empty() {
 		return sdkerrors.Wrap(commitmenttypes.ErrInvalidProof, "cannot submit an empty proof")
 	}
 	if err := msg.Proof.ValidateBasic(); err != nil {

x/ibc/07-tendermint/types/consensus_state.go

@@ -54,7 +54,7 @@ func (cs ConsensusState) GetTimestamp() uint64 {
 
 // ValidateBasic defines a basic validation for the tendermint consensus state.
 func (cs ConsensusState) ValidateBasic() error {
-	if cs.Root == nil || cs.Root.IsEmpty() {
+	if cs.Root == nil || cs.Root.Empty() {
 		return sdkerrors.Wrap(clienttypes.ErrInvalidConsensus, "root cannot be empty")
 	}
 	if cs.ValidatorSet == nil {

x/ibc/23-commitment/exported/exported.go

@@ -14,23 +14,23 @@ package exported
 type Root interface {
 	GetCommitmentType() Type
 	GetHash() []byte
-	IsEmpty() bool
+	Empty() bool
 }
 
 // Prefix implements spec:CommitmentPrefix.
 // Prefix represents the common "prefix" that a set of keys shares.
 type Prefix interface {
 	GetCommitmentType() Type
 	Bytes() []byte
-	IsEmpty() bool
+	Empty() bool
 }
 
 // Path implements spec:CommitmentPath.
 // A path is the additional information provided to the verification function.
 type Path interface {
 	GetCommitmentType() Type
 	String() string
-	IsEmpty() bool
+	Empty() bool
 }
 
 // Proof implements spec:CommitmentProof.
@@ -41,7 +41,7 @@ type Proof interface {
 	GetCommitmentType() Type
 	VerifyMembership(Root, Path, []byte) error
 	VerifyNonMembership(Root, Path) error
-	IsEmpty() bool
+	Empty() bool
 
 	ValidateBasic() error
 }

x/ibc/23-commitment/types/merkle.go

@@ -36,8 +36,8 @@ func (MerkleRoot) GetCommitmentType() exported.Type {
 	return exported.Merkle
 }
 
-// IsEmpty returns true if the root is empty
-func (mr MerkleRoot) IsEmpty() bool {
+// Empty returns true if the root is empty
+func (mr MerkleRoot) Empty() bool {
 	return len(mr.GetHash()) == 0
 }
 
@@ -60,8 +60,8 @@ func (mp MerklePrefix) Bytes() []byte {
 	return mp.KeyPrefix
 }
 
-// IsEmpty returns true if the prefix is empty
-func (mp MerklePrefix) IsEmpty() bool {
+// Empty returns true if the prefix is empty
+func (mp MerklePrefix) Empty() bool {
 	return len(mp.Bytes()) == 0
 }
 
@@ -98,8 +98,8 @@ func (mp MerklePath) Pretty() string {
 	return path
 }
 
-// IsEmpty returns true if the path is empty
-func (mp MerklePath) IsEmpty() bool {
+// Empty returns true if the path is empty
+func (mp MerklePath) Empty() bool {
 	return len(mp.KeyPath.Keys) == 0
 }
 
@@ -114,7 +114,7 @@ func ApplyPrefix(prefix exported.Prefix, path string) (MerklePath, error) {
 		return MerklePath{}, err
 	}
 
-	if prefix == nil || prefix.IsEmpty() {
+	if prefix == nil || prefix.Empty() {
 		return MerklePath{}, sdkerrors.Wrap(ErrInvalidPrefix, "prefix can't be empty")
 	}
 	return NewMerklePath([]string{string(prefix.Bytes()), path}), nil
@@ -129,7 +129,7 @@ func (MerkleProof) GetCommitmentType() exported.Type {
 
 // VerifyMembership verifies the membership pf a merkle proof against the given root, path, and value.
 func (proof MerkleProof) VerifyMembership(root exported.Root, path exported.Path, value []byte) error {
-	if proof.IsEmpty() || root == nil || root.IsEmpty() || path == nil || path.IsEmpty() || len(value) == 0 {
+	if proof.Empty() || root == nil || root.Empty() || path == nil || path.Empty() || len(value) == 0 {
 		return sdkerrors.Wrap(ErrInvalidMerkleProof, "empty params or proof")
 	}
 
@@ -139,22 +139,22 @@ func (proof MerkleProof) VerifyMembership(root exported.Root, path exported.Path
 
 // VerifyNonMembership verifies the absence of a merkle proof against the given root and path.
 func (proof MerkleProof) VerifyNonMembership(root exported.Root, path exported.Path) error {
-	if proof.IsEmpty() || root == nil || root.IsEmpty() || path == nil || path.IsEmpty() {
+	if proof.Empty() || root == nil || root.Empty() || path == nil || path.Empty() {
 		return sdkerrors.Wrap(ErrInvalidMerkleProof, "empty params or proof")
 	}
 
 	runtime := rootmulti.DefaultProofRuntime()
 	return runtime.VerifyAbsence(proof.Proof, root.GetHash(), path.String())
 }
 
-// IsEmpty returns true if the root is empty
-func (proof MerkleProof) IsEmpty() bool {
+// Empty returns true if the root is empty
+func (proof MerkleProof) Empty() bool {
 	return proof.Proof.Equal(nil) || proof.Equal(MerkleProof{}) || proof.Proof.Equal(nil) || proof.Proof.Equal(merkle.Proof{})
 }
 
 // ValidateBasic checks if the proof is empty.
 func (proof MerkleProof) ValidateBasic() error {
-	if proof.IsEmpty() {
+	if proof.Empty() {
 		return ErrInvalidProof
 	}
 	return nil