enum MontageWireMessages {
    MONTAGE_GET = 1;
    MONTAGE_GET_REFERENCE = 2;
    MONTAGE_GET_RESPONSE = 3;
    MONTAGE_COMMAND = 4;
    MONTAGE_COMMAND_RESPONSE = 5;
    MONTAGE_PUT = 6;
    MONTAGE_PUT_RESPONSE = 7;
    MONTAGE_GET_MANY = 8;
    DEPRICATED_MONTAGE_SET_REFERENCE = 9;
    MONTAGE_PUT_MANY = 10;
    MONTAGE_PUT_MANY_RESPONSE = 11;
    MONTAGE_ERROR = 12;
    MONTAGE_DELETE = 13;
    MONTAGE_DELETE_RESPONSE = 14;
}

message MontageSubrequestSpec {
    required bytes sub_spec = 1;
    optional bytes params = 2;
}

message MontageGet {
    required bytes bucket = 1;
    required bytes key = 2;
    optional MontageSubrequestSpec sub = 3;
}

message MontageGetMany {
    /* note: will not execute subrequests!
       master document will be None on
       MontageGetResponse */
    repeated MontageGet gets = 1;
}

message MontageGetReference {
    required bytes bucket = 1;
    required bytes key = 2;
    repeated bytes target_buckets = 3;
}

enum MontageGetStatus {
    EXISTS = 1;
    MISSING = 2;
    ERROR = 3;
}

message MontageObject {
    optional bytes vclock = 1;
    required bytes bucket = 2;
    required bytes key = 3;
    required bytes data = 4;
    optional uint32 fetch_resolutions = 5; // informative
}

message MontageGetResponse {
    repeated MontageGetStatus status = 1;
    optional MontageObject master = 2; // optional b/c missing
    repeated MontageObject subs = 3;
}

message MontageCommand {
    required string command = 1;
    optional bytes argument = 2;
}

message MontageCommandResponse {
    required string status = 1;
    optional bytes value = 2;
}

message MontagePut {
    required MontageObject object = 1;
}

message MontagePutResponse {
    required bool modified = 1;
    required MontageObject object = 2; /* with siblings set */
}

message MontagePutMany {
    repeated MontageObject objects = 1;
}

message MontagePutManyResponse {
    repeated MontagePutResponse objects = 1;
}

message MontageDelete {
    required bytes bucket = 1;
    required bytes key = 2;
}

message MontageDeleteResponse {}

message MontageError {
    required string error = 1;
}

message MontageEnvelope {
    required MontageWireMessages mtype = 1;
    required bytes msg = 2;
    optional bytes msgid = 3;
}