type SyncInitRequest {
   clientCommit: string  = 0;
}

type SyncInitResponse {
   remoteCommit: string  = 0;
   needPull    : boolean = 1;
   needPush    : boolean = 2;
}

type Commit {
   id    : string = 0;
   root  : string = 1;
   before: string = 2;
   merge : string = 3;
   date  : uint64 = 4;
}


type PullGetLogRequest {
   limit: uint32 = 0;
   start: string = 1;
}

type PullGetLogResponse {
   commits: Commit[] = 0;
}

type PullObjectRequest {
   id  : string = 0;
   type: string = 1;
}

type PullObjectResponse {
   found: boolean = 0;
   data : bytes   = 1;
}

type PushObjectRequest {
   id  : string = 0;
   type: string = 1;
   data: bytes  = 2;
}

type PushObjectResponse {
   success: boolean = 0;
}

service Sync {
   SyncInit(SyncInitRequest): SyncInitResponse;
   PullGetLog(PullGetLogRequest): PullGetLogResponse;
   PullObject(PullObjectRequest): PullObjectResponse;
   PushObject(PushObjectRequest): PushObjectResponse;
}