syntax = "proto3";
package ibc.core.client.v1;

option go_package = "github.com/cosmos/cosmos-sdk/x/ibc/core/02-client/types";

import "gogoproto/gogo.proto";
import "google/protobuf/any.proto";

// IdentifiedClientState defines a client state with an additional client
// identifier field.
message IdentifiedClientState {
  // client identifier
  string client_id = 1 [(gogoproto.moretags) = "yaml:\"client_id\""];
  // client state
  google.protobuf.Any client_state = 2 [(gogoproto.moretags) = "yaml:\"client_state\""];
}

// ConsensusStateWithHeight defines a consensus state with an additional height field.
message ConsensusStateWithHeight {
  // consensus state height
  Height height = 1 [(gogoproto.nullable) = false];
  // consensus state
  google.protobuf.Any consensus_state = 2 [(gogoproto.moretags) = "yaml\"consensus_state\""];
}

// ClientConsensusStates defines all the stored consensus states for a given
// client.
message ClientConsensusStates {
  // client identifier
  string client_id = 1 [(gogoproto.moretags) = "yaml:\"client_id\""];
  // consensus states and their heights associated with the client
  repeated ConsensusStateWithHeight consensus_states = 2
      [(gogoproto.moretags) = "yaml:\"consensus_states\"", (gogoproto.nullable) = false];
}

// ClientUpdateProposal is a governance proposal. If it passes, the client is
// updated with the provided header. The update may fail if the header is not
// valid given certain conditions specified by the client implementation.
message ClientUpdateProposal {
  option (gogoproto.goproto_getters) = false;
  // the title of the update proposal
  string title = 1;
  // the description of the proposal
  string description = 2;
  // the client identifier for the client to be updated if the proposal passes
  string client_id = 3 [(gogoproto.moretags) = "yaml:\"client_id\""];
  // the header used to update the client if the proposal passes
  google.protobuf.Any header = 4;
}

// Height is a monotonically increasing data type
// that can be compared against another Height for the purposes of updating and
// freezing clients
//
// Normally the RevisionHeight is incremented at each height while keeping RevisionNumber
// the same. However some consensus algorithms may choose to reset the
// height in certain conditions e.g. hard forks, state-machine breaking changes
// In these cases, the RevisionNumber is incremented so that height continues to
// be monitonically increasing even as the RevisionHeight gets reset
message Height {
  option (gogoproto.goproto_getters)  = false;
  option (gogoproto.goproto_stringer) = false;

  // the revision that the client is currently on
  uint64 revision_number = 1 [(gogoproto.moretags) = "yaml:\"revision_number\""];
  // the height within the given revision
  uint64 revision_height = 2 [(gogoproto.moretags) = "yaml:\"revision_height\""];
}

// Params defines the set of IBC light client parameters.
message Params {
  // allowed_clients defines the list of allowed client state types.
  repeated string allowed_clients = 1 [(gogoproto.moretags) = "yaml:\"allowed_clients\""];
}