feat: generate nft protobuf (#9747)

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## Description

Generate nft protobuf, refer #9826.

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---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

proto/cosmos/nft/v1beta1/event.proto

@@ -0,0 +1,27 @@
+syntax = "proto3";
+package cosmos.nft.v1beta1;
+import "gogoproto/gogo.proto";
+
+option go_package = "github.com/cosmos/cosmos-sdk/x/nft";
+
+// EventSend is emitted on Msg/Send
+message EventSend {
+  string class_id = 1;
+  string id       = 2;
+  string sender   = 3;
+  string receiver = 4;
+}
+
+// EventMint is emitted on Mint
+message EventMint {
+  string class_id = 1;
+  string id       = 2;
+  string owner    = 3;
+}
+
+// EventBurn is emitted on Burn
+message EventBurn {
+  string class_id = 1;
+  string id       = 2;
+  string owner    = 3;
+}

proto/cosmos/nft/v1beta1/genesis.proto

@@ -0,0 +1,22 @@
+syntax = "proto3";
+package cosmos.nft.v1beta1;
+
+import "cosmos/nft/v1beta1/nft.proto";
+
+option go_package = "github.com/cosmos/cosmos-sdk/x/nft";
+
+// GenesisState defines the nft module's genesis state.
+message GenesisState {
+  // class defines the class of the nft type.
+  repeated cosmos.nft.v1beta1.Class classes = 1;
+  repeated Entry                    entries = 2;
+}
+
+// Entry Defines all nft owned by a person
+message Entry {
+  // owner is the owner address of the following nft
+  string owner = 1;
+
+  // nfts is a group of nfts of the same owner
+  repeated cosmos.nft.v1beta1.NFT nfts = 2;
+}

proto/cosmos/nft/v1beta1/nft.proto

@@ -0,0 +1,45 @@
+syntax = "proto3";
+package cosmos.nft.v1beta1;
+
+import "google/protobuf/any.proto";
+
+option go_package = "github.com/cosmos/cosmos-sdk/x/nft";
+
+// Class defines the class of the nft type.
+message Class {
+  // id defines the unique identifier of the NFT classification, similar to the contract address of ERC721
+  string id = 1;
+
+  // name defines the human-readable name of the NFT classification
+  string name = 2;
+
+  // symbol is an abbreviated name for nft classification
+  string symbol = 3;
+
+  // description is a brief description of nft classification
+  string description = 4;
+
+  // uri is a URI may point to a JSON file that conforms to the nft classification Metadata JSON Schema.
+  string uri = 5;
+
+  // uri_hash is a hash of the document pointed to uri
+  string uri_hash = 6;
+}
+
+// NFT defines the NFT.
+message NFT {
+  // class_id defines the unique identifier of the NFT classification, similar to the contract address of ERC721
+  string class_id = 1;
+
+  // id defines the unique identification of NFT
+  string id = 2;
+
+  // uri defines NFT's metadata storage address outside the chain
+  string uri = 3;
+
+  // uri_hash is a hash of the document pointed to uri
+  string uri_hash = 4;
+
+  // data is the metadata of the NFT
+  google.protobuf.Any data = 10;
+}

proto/cosmos/nft/v1beta1/query.proto

@@ -0,0 +1,124 @@
+syntax = "proto3";
+package cosmos.nft.v1beta1;
+
+import "cosmos/base/query/v1beta1/pagination.proto";
+import "google/api/annotations.proto";
+import "cosmos/nft/v1beta1/nft.proto";
+
+option go_package = "github.com/cosmos/cosmos-sdk/x/nft";
+
+// Query defines the gRPC querier service.
+service Query {
+  // Balance queries the number of NFTs of a given class owned by the owner, same as balanceOf in ERC721
+  rpc Balance(QueryBalanceRequest) returns (QueryBalanceResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/balance/{class_id}/{owner}";
+  }
+
+  // Owner queries the owner of the NFT based on its class and id, same as ownerOf in ERC721
+  rpc Owner(QueryOwnerRequest) returns (QueryOwnerResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/owner/{class_id}/{id}";
+  }
+
+  // Supply queries the number of NFTs from the given class, same as totalSupply of ERC721.
+  rpc Supply(QuerySupplyRequest) returns (QuerySupplyResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/supply/{class_id}";
+  }
+
+  // NFTsOfClass queries all NFTs of a given class or optional owner, similar to tokenByIndex in ERC721Enumerable
+  rpc NFTsOfClass(QueryNFTsOfClassRequest) returns (QueryNFTsOfClassResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/nfts/{class_id}";
+  }
+
+  // NFT queries an NFT based on its class and id.
+  rpc NFT(QueryNFTRequest) returns (QueryNFTResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/nfts/{class_id}/{id}";
+  }
+
+  // Class queries an NFT class based on its id
+  rpc Class(QueryClassRequest) returns (QueryClassResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/classes/{class_id}";
+  }
+
+  // Classes queries all NFT classes
+  rpc Classes(QueryClassesRequest) returns (QueryClassesResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/classes";
+  }
+}
+
+// QueryBalanceRequest is the request type for the Query/Balance RPC method
+message QueryBalanceRequest {
+  string class_id = 1;
+  string owner    = 2;
+}
+
+// QueryBalanceResponse is the response type for the Query/Balance RPC method
+message QueryBalanceResponse {
+  uint64 amount = 1;
+}
+
+// QueryOwnerRequest is the request type for the Query/Owner RPC method
+message QueryOwnerRequest {
+  string class_id = 1;
+  string id       = 2;
+}
+
+// QueryOwnerResponse is the response type for the Query/Owner RPC method
+message QueryOwnerResponse {
+  string owner = 1;
+}
+
+// QuerySupplyRequest is the request type for the Query/Supply RPC method
+message QuerySupplyRequest {
+  string class_id = 1;
+}
+
+// QuerySupplyResponse is the response type for the Query/Supply RPC method
+message QuerySupplyResponse {
+  uint64 amount = 1;
+}
+
+// QueryNFTsOfClassRequest is the request type for the Query/NFTsOfClass RPC method
+message QueryNFTsOfClassRequest {
+  string                                class_id   = 1;
+  string                                owner      = 2;
+  cosmos.base.query.v1beta1.PageRequest pagination = 3;
+}
+
+// QueryNFTsOfClassResponse is the response type for the Query/NFTsOfClass and Query/NFTsOfClassByOwner RPC methods
+message QueryNFTsOfClassResponse {
+  repeated cosmos.nft.v1beta1.NFT        nfts       = 1;
+  cosmos.base.query.v1beta1.PageResponse pagination = 2;
+}
+
+// QueryNFTRequest is the request type for the Query/NFT RPC method
+message QueryNFTRequest {
+  string class_id = 1;
+  string id       = 2;
+}
+
+// QueryNFTResponse is the response type for the Query/NFT RPC method
+message QueryNFTResponse {
+  cosmos.nft.v1beta1.NFT nft = 1;
+}
+
+// QueryClassRequest is the request type for the Query/Class RPC method
+message QueryClassRequest {
+  string class_id = 1;
+}
+
+// QueryClassResponse is the response type for the Query/Class RPC method
+message QueryClassResponse {
+  cosmos.nft.v1beta1.Class class = 1;
+}
+
+// QueryClassesRequest is the request type for the Query/Classes RPC method
+message QueryClassesRequest {
+  // pagination defines an optional pagination for the request.
+  cosmos.base.query.v1beta1.PageRequest pagination = 1;
+}
+
+// QueryClassesResponse is the response type for the Query/Classes RPC method
+message QueryClassesResponse {
+  repeated cosmos.nft.v1beta1.Class      classes    = 1;
+  cosmos.base.query.v1beta1.PageResponse pagination = 2;
+}

proto/cosmos/nft/v1beta1/tx.proto

@@ -0,0 +1,28 @@
+syntax = "proto3";
+package cosmos.nft.v1beta1;
+
+import "cosmos/nft/v1beta1/nft.proto";
+
+option go_package = "github.com/cosmos/cosmos-sdk/x/nft";
+
+// Msg defines the nft Msg service.
+service Msg {
+  // Send defines a method to send a nft from one account to another account.
+  rpc Send(MsgSend) returns (MsgSendResponse);
+}
+// MsgSend represents a message to send a nft from one account to another account.
+message MsgSend {
+  // class_id defines the unique identifier of the nft classification, similar to the contract address of ERC721
+  string class_id = 1;
+
+  // id defines the unique identification of nft
+  string id = 2;
+
+  // sender is the address of the owner of nft
+  string sender = 3;
+
+  // receiver is the receiver address of nft
+  string receiver = 4;
+}
+// MsgSendResponse defines the Msg/Send response type.
+message MsgSendResponse {}