proc zuncompress(data: string): string {.raises: [ValueError], tags: [].}

proc zuncompress(data: seq[uint8]): string {.raises: [ValueError], tags: [].}

proc zcompress(data: string): string {.raises: [ValueError], tags: [].}

proc zcrc(data: varargs[string]): uint32 {.raises: [], tags: [].}