feat: initialize module x/nft

proto/cosmos/nft/v1beta1/genesis.proto

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+syntax = "proto3";
+package cosmos.nft.v1beta1;
+
+import "gogoproto/gogo.proto";
+import "google/protobuf/any.proto";
+import "cosmos_proto/cosmos.proto";
+
+option go_package = "github.com/cosmos/cosmos-sdk/x/nft/types";
+
+// GenesisState defines the NFT module's genesis state
+message GenesisState {
+  repeated google.protobuf.Any nfts = 1 [(cosmos_proto.accepts_interface) = "NFTI", (gogoproto.customname) = "NFTs"];
+}

proto/cosmos/nft/v1beta1/nft.proto

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+syntax = "proto3";
+package cosmos.nft.v1beta1;
+
+import "gogoproto/gogo.proto";
+import "google/protobuf/any.proto";
+
+option go_package                      = "github.com/cosmos/cosmos-sdk/x/nft/types";
+option (gogoproto.goproto_getters_all) = false;
+
+// BaseNFT defines a base NFT type.
+message BaseNFT {
+  option (gogoproto.equal) = true;
+
+  string id    = 1;
+  string name  = 2;
+  string uri   = 3 [(gogoproto.customname) = "URI"];
+  string data  = 4;
+  string owner = 5;
+}

proto/cosmos/nft/v1beta1/query.proto

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+syntax = "proto3";
+package cosmos.nft.v1beta1;
+
+import "gogoproto/gogo.proto";
+import "google/protobuf/any.proto";
+import "google/api/annotations.proto";
+import "cosmos/base/query/v1beta1/pagination.proto";
+import "cosmos_proto/cosmos.proto";
+
+option go_package = "github.com/cosmos/cosmos-sdk/x/nft/types";
+
+// Query defines the gRPC querier service for NFT module
+service Query {
+
+  // NFT queries NFT details based on id.
+  rpc NFT(QueryNFTRequest) returns (QueryNFTResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/nfts/{id}";
+  }
+
+  // NFTs queries all proposals based on the optional onwer.
+  rpc NFTs(QueryNFTsRequest) returns (QueryNFTsResponse) {
+    option (google.api.http).get = "/cosmos/nft/v1beta1/nfts";
+  }
+}
+
+// QueryNFTRequest is the request type for the Query/NFT RPC method
+message QueryNFTRequest {
+  string id = 1;
+}
+
+// QueryNFTResponse is the response type for the Query/NFT RPC method
+message QueryNFTResponse {
+  google.protobuf.Any nft = 1 [(cosmos_proto.accepts_interface) = "NFTI", (gogoproto.customname) = "NFT"];
+}
+
+// QueryNFTsRequest is the request type for the Query/NFTs RPC method
+message QueryNFTsRequest {
+  string                                 owner      = 1;
+  cosmos.base.query.v1beta1.PageResponse pagination = 2;
+}
+
+// QueryNFTsResponse is the response type for the Query/NFTs RPC method
+message QueryNFTsResponse {
+  repeated google.protobuf.Any nfts = 1 [(cosmos_proto.accepts_interface) = "NFTI", (gogoproto.customname) = "NFTs"];
+  cosmos.base.query.v1beta1.PageResponse pagination = 2;
+}

x/nft/types/nft.go

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+package types
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+// NFTI is an interface used to store NFTs at a given id and owner.
+type NFTI interface {
+	GetId() string // can not return empty string.
+	GetOwner() sdk.AccAddress
+}