syntax = "proto3";
package ibc.channel;

import "gogoproto/gogo.proto";
import "cosmos/query/pagination.proto";
import "ibc/channel/channel.proto";

option go_package = "github.com/cosmos/cosmos-sdk/x/ibc/04-channel/types";

// Query provides defines the gRPC querier service
service Query {
  // Channel queries an IBC Channel.
  rpc Channel(QueryChannelRequest) returns (QueryChannelResponse) {}

  // Channels queries all the IBC channels of a chain.
  rpc Channels(QueryChannelsRequest) returns (QueryChannelsResponse) {}

  // ConnectionChannels queries all the channels associated with a connection end.
  rpc ConnectionChannels(QueryConnectionChannelsRequest) returns (QueryConnectionChannelsResponse) {}

  // PacketCommitment queries a stored packet commitment hash.
  rpc PacketCommitment(QueryPacketCommitmentRequest) returns (QueryPacketCommitmentResponse) {}

  // PacketCommitments returns the all the packet commitments hashes associated with a channel.
  rpc PacketCommitments(QueryPacketCommitmentsRequest) returns (QueryPacketCommitmentsResponse) {}

  // PacketAcknowledgement queries a stored packet acknowledgement hash.
  rpc PacketAcknowledgement(QueryPacketAcknowledgementRequest) returns (QueryPacketAcknowledgementResponse) {}

  // UnrelayedPackets returns all the unrelayed IBC packets associated with a channel and sequences.
  rpc UnrelayedPackets(QueryUnrelayedPacketsRequest) returns (QueryUnrelayedPacketsResponse) {}

  // NextSequenceReceive returns the next receive sequence for a given channel
  rpc NextSequenceReceive(QueryNextSequenceReceiveRequest) returns (QueryNextSequenceReceiveResponse) {}

  // TODO: blocked by client proto migration
  // rpc ChannelClientState(QueryChannelClientStateRequest) returns (QueryChannelClientStateRequest) {}
  // rpc ChannelConsensusState(QueryChannelConsensusStateRequest) returns (QueryChannelConsensusStateRequest) {}  
}

// QueryChannelRequest is the request type for the Query/Channel RPC method
message QueryChannelRequest {
  // port unique identifier
  string port_id = 1 [(gogoproto.customname) = "PortID"];
  // channel unique identifier
  string channel_id = 2 [(gogoproto.customname) = "ChannelID"];
}

// QueryChannelResponse is the response type for the Query/Channel RPC method.
// Besides the Channel end, it includes a proof and the height from which the
// proof was retrieved.
message QueryChannelResponse {
  // channel associated with the request identifiers
  ibc.channel.Channel channel = 1;
  // merkle proof of existence
  bytes proof = 2;
  // merkle proof path
  string proof_path = 3;
  // height at which the proof was retrieved
  uint64 proof_height = 4;
}

// QueryChannelsRequest is the request type for the Query/Channels RPC method
message QueryChannelsRequest {
  // pagination request
  cosmos.query.PageRequest req = 1;
}

// QueryChannelsResponse is the response type for the Query/Channels RPC method.
message QueryChannelsResponse {
  // list of stored channels of the chain.
  repeated ibc.channel.IdentifiedChannel channels = 1;
  // pagination response
  cosmos.query.PageResponse res = 2;
  // query block height
  int64 height = 3;
}

// QueryConnectionChannelsRequest is the request type for the Query/QueryConnectionChannels RPC method
message QueryConnectionChannelsRequest {
  // connection unique identifier
  string connection = 1;
  // pagination request
  cosmos.query.PageRequest req = 2;
}

// QueryConnectionChannelsResponse is the Response type for the Query/QueryConnectionChannels RPC method
message QueryConnectionChannelsResponse {
  // list of channels associated with a connection.
  repeated ibc.channel.IdentifiedChannel channels = 1;
  // pagination response
  cosmos.query.PageResponse res = 2;
  // query block height
  int64 height = 3;
}

// QueryPacketCommitmentRequest is the request type for the Query/PacketCommitment RPC method
message QueryPacketCommitmentRequest {
  // port unique identifier
  string port_id = 1 [(gogoproto.customname) = "PortID"];
  // channel unique identifier
  string channel_id = 2 [(gogoproto.customname) = "ChannelID"];
  // packet sequence
  uint64 sequence = 3;
}

// QueryPacketCommitmentResponse defines the client query response for a packet which also
// includes a proof, its path and the height form which the proof was retrieved
message QueryPacketCommitmentResponse {
  // packet associated with the request fields
  bytes commitment = 1;
  // merkle proof of existence
  bytes proof = 2;
  // merkle proof path
  string proof_path = 3;
  // height at which the proof was retrieved
  uint64 proof_height = 4;
}

// QueryPacketCommitmentsRequest is the request type for the Query/QueryPacketCommitments RPC method
message QueryPacketCommitmentsRequest {
  // port unique identifier
  string port_id = 1 [(gogoproto.customname) = "PortID"];
  // channel unique identifier
  string channel_id = 2 [(gogoproto.customname) = "ChannelID"];
  // pagination request
  cosmos.query.PageRequest req = 3;
}

// QueryPacketCommitmentsResponse is the request type for the Query/QueryPacketCommitments RPC method
message QueryPacketCommitmentsResponse {
  repeated ibc.channel.PacketAckCommitment commitments = 1;
  // pagination response
  cosmos.query.PageResponse res = 2;
  // query block height
  int64 height = 3;
}

// QueryPacketAcknowledgementRequest is the request type for the Query/PacketAcknowledgement RPC method
message QueryPacketAcknowledgementRequest {
  // port unique identifier
  string port_id = 1 [(gogoproto.customname) = "PortID"];
  // channel unique identifier
  string channel_id = 2 [(gogoproto.customname) = "ChannelID"];
  // packet sequence
  uint64 sequence = 3;
}

// QueryPacketAcknowledgementResponse defines the client query response for a packet which also
// includes a proof, its path and the height form which the proof was retrieved
message QueryPacketAcknowledgementResponse {
  // packet associated with the request fields
  bytes acknowledgement = 1;
  // merkle proof of existence
  bytes proof = 2;
  // merkle proof path
  string proof_path = 3;
  // height at which the proof was retrieved
  uint64 proof_height = 4;
}

// QueryUnrelayedPacketsRequest is the request type for the Query/UnrelayedPackets RPC method
message QueryUnrelayedPacketsRequest {
  // port unique identifier
  string port_id = 1 [(gogoproto.customname) = "PortID"];
  // channel unique identifier
  string channel_id = 2 [(gogoproto.customname) = "ChannelID"];
  // list of packet sequences
  repeated uint64 packet_commitment_sequences = 3 [(gogoproto.customname) = "PacketCommitmentSequences"];
  // flag indicating if the return value is packet commitments or acknowledgements
  bool acknowledgements = 4;
}

// QueryUnrelayedPacketsResponse is the request type for the Query/UnrelayedPacketCommitments RPC method
message QueryUnrelayedPacketsResponse {
  // list of unrelayed packet sequences
  repeated uint64 sequences = 1;
  // query block height
  int64 height = 2;
}

// QueryNextSequenceReceiveRequest is the request type for the Query/QueryNextSequenceReceiveRequest RPC method
message QueryNextSequenceReceiveRequest {
  // port unique identifier
  string port_id = 1 [(gogoproto.customname) = "PortID"];
  // channel unique identifier
  string channel_id = 2 [(gogoproto.customname) = "ChannelID"];
}

// QuerySequenceResponse is the request type for the Query/QueryNextSequenceReceiveResponse RPC method
message QueryNextSequenceReceiveResponse {
  // next sequence receive number
  uint64 next_sequence_receive = 1;
  // merkle proof of existence
  bytes proof = 2;
  // merkle proof path
  string proof_path = 3;
  // height at which the proof was retrieved
  uint64 proof_height = 4;
}

// QueryChannelClientStateRequest is the request type for the Query/ClientState RPC method
message QueryChannelClientStateRequest {
  // port unique identifier
  string port_id = 1 [(gogoproto.customname) = "PortID"];
  // channel unique identifier
  string channel_id = 2 [(gogoproto.customname) = "ChannelID"];
}

// QueryChannelConsensusStateRequest is the request type for the Query/ConsensusState RPC method
message QueryChannelConsensusStateRequest {
  // port unique identifier
  string port_id = 1 [(gogoproto.customname) = "PortID"];
  // channel unique identifier
  string channel_id = 2 [(gogoproto.customname) = "ChannelID"];
}