diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.md
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) 2018, Monadic GmbH
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Monadic GmbH nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,1 @@
+Haskell base-128 variable-width integers ([VarInts](https://developers.google.com/protocol-buffers/docs/encoding#varints)) via [Data.Binary](https://hackage.haskell.org/package/binary).
diff --git a/binary-varint.cabal b/binary-varint.cabal
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--- /dev/null
+++ b/binary-varint.cabal
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+cabal-version: 2.2
+build-type:    Simple
+
+name:          binary-varint
+version:       0.1.0.0
+synopsis:      VarInt encoding/decoding via Data.Binary
+homepage:      https://github.com/oscoin/ipfs
+bug-reports:   https://github.com/oscoin/ipfs/issues
+license:       BSD-3-Clause
+license-file:  LICENSE
+author:        Kim Altintop
+maintainer:    Kim Altintop <kim@monadic.xyz>, Monadic Team <team@monadic.xyz>
+copyright:     2018 Monadic GmbH
+
+category:      Data
+
+extra-source-files:
+      CHANGELOG.md
+    , README.md
+
+source-repository head
+    type: git
+    location: https://github.com/oscoin/ipfs
+
+common common
+    default-language: Haskell2010
+    ghc-options:
+        -Wall
+        -Wcompat
+        -Wincomplete-uni-patterns
+        -Wincomplete-record-updates
+        -Wredundant-constraints
+        -fprint-expanded-synonyms
+        -funbox-small-strict-fields
+
+library
+    import: common
+    hs-source-dirs: src
+    exposed-modules:
+        Data.Binary.VarInt
+
+    build-depends:
+        base >= 4.9 && < 5
+      , binary >= 0.8.3
diff --git a/src/Data/Binary/VarInt.hs b/src/Data/Binary/VarInt.hs
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--- /dev/null
+++ b/src/Data/Binary/VarInt.hs
@@ -0,0 +1,36 @@
+-- |
+-- Copyright   : 2018 Monadic GmbH
+-- License     : BSD3
+-- Maintainer  : kim@monadic.xyz, team@monadic.xyz
+-- Stability   : stable
+-- Portability : portable
+--
+module Data.Binary.VarInt
+    ( getVarInt
+    , putVarInt
+    , buildVarInt
+    )
+where
+
+import qualified Data.Binary as Binary
+import           Data.Binary.Builder (Builder)
+import qualified Data.Binary.Builder as Builder
+import qualified Data.Binary.Put as Binary (putLazyByteString)
+import           Data.Bits
+import           Data.Word (Word8)
+
+getVarInt :: (Num a, Bits a) => Word8 -> Binary.Get a
+getVarInt n
+    | testBit n 7 = do
+        v <- Binary.getWord8 >>= getVarInt
+        pure $ shiftL v 7 .|. clearBit (fromIntegral n) 7
+    | otherwise = pure $ fromIntegral n
+
+putVarInt :: (Integral a, Bits a) => a -> Binary.Put
+putVarInt = Binary.putLazyByteString . Builder.toLazyByteString . buildVarInt
+
+buildVarInt :: (Integral a, Bits a) => a -> Builder
+buildVarInt n
+    | n < 0x80  = Builder.singleton $ fromIntegral n
+    | otherwise = Builder.singleton (setBit (fromIntegral n) 7)
+               <> buildVarInt (shiftR n 7)