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/{owner}/{class_id}";
  }

  // 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;
}