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6 changes: 6 additions & 0 deletions src/Simplex/Messaging/Compression.hs
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ module Simplex.Messaging.Compression
compressionLevel,
compress1,
decompress1,
decompressedSize,
) where

import qualified Codec.Compression.Zstd as Z1
Expand Down Expand Up @@ -42,6 +43,11 @@ compress1 bs
| B.length bs <= maxLengthPassthrough = Passthrough bs
| otherwise = Compressed . Large $ Z1.compress compressionLevel bs

decompressedSize :: Compressed -> Maybe Int
decompressedSize = \case
Passthrough bs -> Just $ B.length bs
Compressed (Large bs) -> Z1.decompressedSize bs

decompress1 :: Int -> Compressed -> Either String ByteString
decompress1 limit = \case
Passthrough bs -> Right bs
Expand Down
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