refactor: remove unnecessary exported.Proof interface type

CHANGELOG.md

@@ -52,6 +52,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (testing) [\#6070](https://github.com/cosmos/ibc-go/pull/6070) Remove `AssertEventsLegacy` function.
 * (core) [\#6138](https://github.com/cosmos/ibc-go/pull/6138) Remove `Router` reference from IBC core keeper and use instead the router on the existing `PortKeeper` reference.
 * (core/04-channel) [\#6023](https://github.com/cosmos/ibc-go/pull/6023) Remove emission of non-hexlified event attributes `packet_data` and `packet_ack`.
+* (core) [\#6320][https://github.com/cosmos/ibc-go/pull/6320] Remove unnecessary `Proof` interface from `exported` package.
 
 ### State Machine Breaking
 

docs/docs/05-migrations/13-v8-to-v9.md

@@ -28,6 +28,7 @@ There are four sections based on the four potential user groups of this document
 
 The `exported.ChannelI` and `exported.CounterpartyChannelI` interfaces have been removed. Please use the concrete types.
 The `exported.ConnectionI` and `exported.CounterpartyConnectionI` interfaces have been removed. Please use the concrete types.
+The `exported.Proof` interface has been removed. Please use the `MerkleProof` concrete type.
 
 The functions `GetState()`, `GetOrdering()`, `GetCounterparty()`, `GetConnectionHops()`, `GetVersion()` of the `Channel` type have been removed.
 The functions `GetPortID()`, `GetChannelID()` of the `CounterpartyChannel` type have been removed.

modules/core/23-commitment/types/codec.go

@@ -20,10 +20,6 @@ func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 		"ibc.core.commitment.v1.Path",
 		(*exported.Path)(nil),
 	)
-	registry.RegisterInterface(
-		"ibc.core.commitment.v1.Proof",
-		(*exported.Proof)(nil),
-	)
 
 	registry.RegisterImplementations(
 		(*exported.Root)(nil),
@@ -37,8 +33,4 @@ func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 		(*exported.Path)(nil),
 		&MerklePath{},
 	)
-	registry.RegisterImplementations(
-		(*exported.Proof)(nil),
-		&MerkleProof{},
-	)
 }

modules/core/23-commitment/types/codec_test.go

@@ -29,11 +29,6 @@ func (suite *MerkleTestSuite) TestCodecTypeRegistration() {
 			sdk.MsgTypeURL(&types.MerklePath{}),
 			true,
 		},
-		{
-			"success: MerkleProof",
-			sdk.MsgTypeURL(&types.MerkleProof{}),
-			true,
-		},
 		{
 			"type not registered on codec",
 			"ibc.invalid.MsgTypeURL",

modules/core/23-commitment/types/merkle.go

@@ -98,8 +98,6 @@ func ApplyPrefix(prefix exported.Prefix, path MerklePath) (MerklePath, error) {
 	return NewMerklePath(append([]string{string(prefix.Bytes())}, path.KeyPath...)...), nil
 }
 
-var _ exported.Proof = (*MerkleProof)(nil)
-
 // VerifyMembership verifies the membership of a merkle proof against the given root, path, and value.
 // Note that the path is expected as []string{<store key of module>, <key corresponding to requested value>}.
 func (proof MerkleProof) VerifyMembership(specs []*ics23.ProofSpec, root exported.Root, path exported.Path, value []byte) error {

modules/core/exported/commitment.go

@@ -1,7 +1,5 @@
 package exported
 
-import ics23 "github.com/cosmos/ics23/go"
-
 // ICS 023 Types Implementation
 //
 // This file includes types defined under
@@ -30,15 +28,3 @@ type Prefix interface {
 type Path interface {
 	Empty() bool
 }
-
-// Proof implements spec:CommitmentProof.
-// Proof can prove whether the key-value pair is a part of the Root or not.
-// Each proof has designated key-value pair it is able to prove.
-// Proofs include key but value is provided dynamically at the verification time.
-type Proof interface {
-	VerifyMembership([]*ics23.ProofSpec, Root, Path, []byte) error
-	VerifyNonMembership([]*ics23.ProofSpec, Root, Path) error
-	Empty() bool
-
-	ValidateBasic() error
-}