syntax = "proto3";

package ibc.applications.fee.v1;

option go_package = "github.com/cosmos/ibc-go/v7/modules/apps/29-fee/types";

import "gogoproto/gogo.proto";
import "ibc/applications/fee/v1/fee.proto";
import "ibc/core/channel/v1/channel.proto";

// Msg defines the ICS29 Msg service.
service Msg {
  // RegisterPayee defines a rpc handler method for MsgRegisterPayee
  // RegisterPayee is called by the relayer on each channelEnd and allows them to set an optional
  // payee to which reverse and timeout relayer packet fees will be paid out. The payee should be registered on
  // the source chain from which packets originate as this is where fee distribution takes place. This function may be
  // called more than once by a relayer, in which case, the latest payee is always used.
  rpc RegisterPayee(MsgRegisterPayee) returns (MsgRegisterPayeeResponse);

  // RegisterCounterpartyPayee defines a rpc handler method for MsgRegisterCounterpartyPayee
  // RegisterCounterpartyPayee is called by the relayer on each channelEnd and allows them to specify the counterparty
  // payee address before relaying. This ensures they will be properly compensated for forward relaying since
  // the destination chain must include the registered counterparty payee address in the acknowledgement. This function
  // may be called more than once by a relayer, in which case, the latest counterparty payee address is always used.
  rpc RegisterCounterpartyPayee(MsgRegisterCounterpartyPayee) returns (MsgRegisterCounterpartyPayeeResponse);

  // PayPacketFee defines a rpc handler method for MsgPayPacketFee
  // PayPacketFee is an open callback that may be called by any module/user that wishes to escrow funds in order to
  // incentivize the relaying of the packet at the next sequence
  // NOTE: This method is intended to be used within a multi msg transaction, where the subsequent msg that follows
  // initiates the lifecycle of the incentivized packet
  rpc PayPacketFee(MsgPayPacketFee) returns (MsgPayPacketFeeResponse);

  // PayPacketFeeAsync defines a rpc handler method for MsgPayPacketFeeAsync
  // PayPacketFeeAsync is an open callback that may be called by any module/user that wishes to escrow funds in order to
  // incentivize the relaying of a known packet (i.e. at a particular sequence)
  rpc PayPacketFeeAsync(MsgPayPacketFeeAsync) returns (MsgPayPacketFeeAsyncResponse);
}

// MsgRegisterPayee defines the request type for the RegisterPayee rpc
message MsgRegisterPayee {
  option (gogoproto.equal)           = false;
  option (gogoproto.goproto_getters) = false;

  // unique port identifier
  string port_id = 1 [(gogoproto.moretags) = "yaml:\"port_id\""];
  // unique channel identifier
  string channel_id = 2 [(gogoproto.moretags) = "yaml:\"channel_id\""];
  // the relayer address
  string relayer = 3;
  // the payee address
  string payee = 4;
}

// MsgRegisterPayeeResponse defines the response type for the RegisterPayee rpc
message MsgRegisterPayeeResponse {}

// MsgRegisterCounterpartyPayee defines the request type for the RegisterCounterpartyPayee rpc
message MsgRegisterCounterpartyPayee {
  option (gogoproto.equal)           = false;
  option (gogoproto.goproto_getters) = false;

  // unique port identifier
  string port_id = 1 [(gogoproto.moretags) = "yaml:\"port_id\""];
  // unique channel identifier
  string channel_id = 2 [(gogoproto.moretags) = "yaml:\"channel_id\""];
  // the relayer address
  string relayer = 3;
  // the counterparty payee address
  string counterparty_payee = 4 [(gogoproto.moretags) = "yaml:\"counterparty_payee\""];
}

// MsgRegisterCounterpartyPayeeResponse defines the response type for the RegisterCounterpartyPayee rpc
message MsgRegisterCounterpartyPayeeResponse {}

// MsgPayPacketFee defines the request type for the PayPacketFee rpc
// This Msg can be used to pay for a packet at the next sequence send & should be combined with the Msg that will be
// paid for
message MsgPayPacketFee {
  option (gogoproto.equal)           = false;
  option (gogoproto.goproto_getters) = false;

  // fee encapsulates the recv, ack and timeout fees associated with an IBC packet
  ibc.applications.fee.v1.Fee fee = 1 [(gogoproto.nullable) = false];
  // the source port unique identifier
  string source_port_id = 2 [(gogoproto.moretags) = "yaml:\"source_port_id\""];
  // the source channel unique identifer
  string source_channel_id = 3 [(gogoproto.moretags) = "yaml:\"source_channel_id\""];
  // account address to refund fee if necessary
  string signer = 4;
  // optional list of relayers permitted to the receive packet fees
  repeated string relayers = 5;
}

// MsgPayPacketFeeResponse defines the response type for the PayPacketFee rpc
message MsgPayPacketFeeResponse {}

// MsgPayPacketFeeAsync defines the request type for the PayPacketFeeAsync rpc
// This Msg can be used to pay for a packet at a specified sequence (instead of the next sequence send)
message MsgPayPacketFeeAsync {
  option (gogoproto.equal)           = false;
  option (gogoproto.goproto_getters) = false;

  // unique packet identifier comprised of the channel ID, port ID and sequence
  ibc.core.channel.v1.PacketId packet_id = 1
      [(gogoproto.moretags) = "yaml:\"packet_id\"", (gogoproto.nullable) = false];
  // the packet fee associated with a particular IBC packet
  PacketFee packet_fee = 2 [(gogoproto.moretags) = "yaml:\"packet_fee\"", (gogoproto.nullable) = false];
}

// MsgPayPacketFeeAsyncResponse defines the response type for the PayPacketFeeAsync rpc
message MsgPayPacketFeeAsyncResponse {}
