diff --git a/datastore/databuffer.nim b/datastore/databuffer.nim
index 3ce4651..1a5e546 100644
--- a/datastore/databuffer.nim
+++ b/datastore/databuffer.nim
@@ -1,16 +1,17 @@
-
-
-
 # import std/atomics
 import threading/smartptrs
 
-
 type
   DataBufferHolder* = object
     buf: ptr UncheckedArray[byte]
     size: int
   
-  DataBuffer* = SharedPtr[DataBufferHolder]
+  DataBuffer* = SharedPtr[DataBufferHolder] ##\
+    ## A fixed length data buffer using a SharedPtr.
+    ## It is thread safe even with `refc` since
+    ## it doesn't use string or seq types internally.
+    ## 
+
   KeyBuffer* = DataBuffer
   ValueBuffer* = DataBuffer
   StringBuffer* = DataBuffer
@@ -27,6 +28,7 @@ proc `=destroy`*(x: var DataBufferHolder) =
 proc len*(a: DataBuffer): int = a[].size
 
 proc new*(tp: typedesc[DataBuffer], size: int = 0): DataBuffer =
+  ## allocate new buffer with given size
   newSharedPtr(DataBufferHolder(
     buf: cast[typeof(result[].buf)](allocShared0(size)),
     size: size,
@@ -40,18 +42,22 @@ proc new*[T: byte | char](tp: typedesc[DataBuffer], data: openArray[T]): DataBuf
     copyMem(result[].buf, unsafeAddr data[0], data.len)
 
 proc toSeq*[T: byte | char](a: DataBuffer, tp: typedesc[T]): seq[T] =
+  ## convert buffer to a seq type using copy and either a byte or char
   result = newSeq[T](a.len)
   copyMem(addr result[0], unsafeAddr a[].buf[0], a.len)
 
 proc toString*(data: DataBuffer): string =
+  ## convert buffer to string type using copy
   result = newString(data.len())
   if data.len() > 0:
     copyMem(addr result[0], unsafeAddr data[].buf[0], data.len)
 
-proc toCatchable*(data: CatchableErrorBuffer): ref CatchableError =
-  result = (ref CatchableError)(msg: data.msg.toString())
+proc toCatchable*(err: CatchableErrorBuffer): ref CatchableError =
+  ## convert back to a ref CatchableError
+  result = (ref CatchableError)(msg: err.msg.toString())
 
 proc toBuffer*(err: ref Exception): CatchableErrorBuffer =
+  ## convert exception to an object with StringBuffer
   return CatchableErrorBuffer(
     msg: StringBuffer.new(err.msg)
   )