A couple of shortcut methods on Func

build.sbt

@@ -1,5 +1,6 @@
 import de.heikoseeberger.sbtheader.License
-import sbtcrossproject.crossProject
+import org.scalajs.sbtplugin.ScalaJSPlugin.autoImport._
+import sbtcrossproject.CrossPlugin.autoImport.crossProject
 
 name := "codec"
 
@@ -13,7 +14,7 @@ val scalaV = scalaVersion := "2.12.8"
 
 val commons = Seq(
   scalaV,
-  crossScalaVersions := Seq(scalaVersion.value, "2.13.0"),
+  //crossScalaVersions := Seq(scalaVersion.value, "2.13.0-RC1"),
   version                   := "0.0.5",
   fork in Test              := true,
   parallelExecution in Test := false,
@@ -30,18 +31,19 @@ val commons = Seq(
 
 commons
 
-val kindProjector = addCompilerPlugin("org.typelevel" % "kind-projector" % "0.10.3" cross CrossVersion.binary)
+val kindProjector = addCompilerPlugin("org.typelevel" % "kind-projector" % "0.10.0" cross CrossVersion.binary)
 
-val Cats1V = "2.0.0-RC1"
+val Cats1V = "1.6.0"
 val ScodecBitsV = "1.1.10"
-val CirceV = "0.12.0-RC2"
+val CirceV = "0.11.1"
 val ShapelessV = "2.3.+"
 
 val chill = "com.twitter" %% "chill" % "0.9.3"
 
 val ScalatestV = "3.0.5"
 
-val ScalacheckV = "1.14.0"
+// Note that cats-laws 1.5 are compiled against scalacheck 1.13, and scalacheck-shapeless should also not introduce the upgrade
+val ScalacheckV = "1.13.5"
 
 val protobuf = Seq(
   PB.targets in Compile := Seq(
@@ -64,7 +66,7 @@ lazy val `codec-core` = crossProject(JVMPlatform, JSPlatform)
     libraryDependencies ++= Seq(
       "org.typelevel"              %%% "cats-core"                 % Cats1V,
       "org.typelevel"              %%% "cats-testkit"              % Cats1V % Test,
-      "com.github.alexarchambault" %%% "scalacheck-shapeless_1.13" % "1.2.3" % Test,
+      "com.github.alexarchambault" %%% "scalacheck-shapeless_1.13" % "1.1.8" % Test,
       "org.scalacheck"             %%% "scalacheck"                % ScalacheckV % Test,
       "org.scalatest"              %%% "scalatest"                 % ScalatestV % Test
     )

core/src/main/scala/fluence/codec/MonadicalEitherArrow.scala

@@ -49,6 +49,7 @@ abstract class MonadicalEitherArrow[E <: Throwable] {
    * @tparam B Successful result type
    */
   abstract class Func[A, B] {
+    f ⇒
 
     /**
      * Run the func on input, using the given monad.
@@ -76,6 +77,30 @@ abstract class MonadicalEitherArrow[E <: Throwable] {
      */
     def apply[F[_]: Monad](input: A): EitherT[F, E, B]
 
+    /**
+     * Shortcut for function composition
+     *
+     * @param other Other function to run after
+     * @tparam C Resulting input type
+     * @return Composed function
+     */
+    def on[C](other: Func[C, A]): Func[C, B] =
+      catsMonadicalEitherArrowChoice.compose(this, other)
+
+    /**
+     * Convert this Func into another one, lifting the error
+     *
+     * @param m Another instance of MonadicalEitherArrow
+     * @param convertE Convert error
+     * @tparam EE Error type
+     * @return Converted function
+     */
+    def to[EE <: Throwable](m: MonadicalEitherArrow[EE])(implicit convertE: E ⇒ EE): m.Func[A, B] =
+      new m.Func[A, B] {
+        override def apply[F[_]: Monad](input: A): EitherT[F, EE, B] =
+          f[F](input).leftMap(convertE)
+      }
+
     /**
      * Converts this Func to Kleisli, using MonadError to execute upon and to lift errors into.
      *

kryo/src/main/scala/fluence/codec/kryo/KryoCodecs.scala

@@ -101,6 +101,8 @@ object KryoCodecs {
     /**
      * Build a new instance of KryoCodecs with the given poolSize and F effect
      * @param poolSize Kryo pool size
+     * @param F ApplicativeError for catching serialization errors
+     * @tparam F Effect type
      * @return Configured instance of KryoCodecs
      */
     def build(

project/plugins.sbt

@@ -1,19 +1,21 @@
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.0.3")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.0.0")
 
-addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.25")
+addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.20")
 
 addSbtPlugin("de.heikoseeberger" % "sbt-header" % "5.2.0")
 
-addSbtPlugin("com.thesamet" % "sbt-protoc" % "0.99.23")
+addSbtPlugin("com.thesamet" % "sbt-protoc" % "0.99.20")
 
-addSbtPlugin("org.scala-js"       % "sbt-scalajs"              % "0.6.28")
+addSbtPlugin("org.scala-js"       % "sbt-scalajs"              % "0.6.27")
-addSbtPlugin("org.portable-scala" % "sbt-crossproject"         % "0.6.1")
+addSbtPlugin("org.portable-scala" % "sbt-crossproject"         % "0.6.0")
-addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.1")
+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.0")
 
-addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.15.0")
+addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.14.0")
 
 addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.9.2")
 
-libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.9.0"
+addSbtPlugin("com.lihaoyi" % "workbench" % "0.4.1")
+
+libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.8.4"
 
 addSbtPlugin("org.foundweekends" % "sbt-bintray" % "0.5.4")