diff --git a/ci/build.yml b/ci/build.yml
index bfa6eaa7e1b..2ba9ac27e53 100644
--- a/ci/build.yml
+++ b/ci/build.yml
@@ -182,6 +182,7 @@ jobs:
           //ledger-api/... \
           //ledger/... \
           //ledger-service/... \
+          //triggers/... \
           -//ledger-service/http-json/... \
           -//ledger-service/http-json-perf/... \
           -//ledger-service/http-json-testing/... \
@@ -199,6 +200,7 @@ jobs:
           //ledger/... \
           //ledger-service/... \
           //daml-script/dump/... \
+          //triggers/... \
           -//libs-scala/gatling-utils/... \
           -//language-support/scala/examples/... \
           -//language-support/scala/codegen-sample-app/... \
diff --git a/triggers/runner/BUILD.bazel b/triggers/runner/BUILD.bazel
index b239331acf2..dcacc3668f4 100644
--- a/triggers/runner/BUILD.bazel
+++ b/triggers/runner/BUILD.bazel
@@ -14,6 +14,13 @@ tsvc_main_scalacopts = ["-P:wartremover:traverser:org.wartremover.warts.%s" % wa
 da_scala_library(
     name = "trigger-runner-lib",
     srcs = glob(["src/main/scala/**/*.scala"]),
+    scala_deps = [
+        "@maven//:com_github_scopt_scopt",
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:org_scala_lang_modules_scala_collection_compat",
+        "@maven//:org_scalaz_scalaz_core",
+        "@maven//:org_typelevel_paiges_core",
+    ],
     scalacopts = tsvc_main_scalacopts,
     tags = ["maven_coordinates=com.daml:trigger-runner:__VERSION__"],
     visibility = ["//visibility:public"],
@@ -34,11 +41,6 @@ da_scala_library(
         "//libs-scala/auth-utils",
         "//libs-scala/contextualized-logging",
         "//libs-scala/scala-utils",
-        "@maven//:com_github_scopt_scopt_2_12",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:org_scala_lang_modules_scala_collection_compat_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
-        "@maven//:org_typelevel_paiges_core_2_12",
     ],
 )
 
diff --git a/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Converter.scala b/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Converter.scala
index b596e6041fc..3572ae7c05e 100644
--- a/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Converter.scala
+++ b/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Converter.scala
@@ -310,37 +310,55 @@ object Converter {
   }
 
   private def toFiniteDuration(value: SValue): Either[String, FiniteDuration] =
-    value expect ("RelTime", { case SRecord(_, _, JavaList(SInt64(microseconds))) =>
-      FiniteDuration(microseconds, MICROSECONDS)
-    })
+    value.expect(
+      "RelTime",
+      { case SRecord(_, _, JavaList(SInt64(microseconds))) =>
+        FiniteDuration(microseconds, MICROSECONDS)
+      },
+    )
 
   private def toIdentifier(v: SValue): Either[String, Identifier] =
-    v expect ("STypeRep", { case STypeRep(TTyCon(id)) =>
-      id
-    })
+    v.expect(
+      "STypeRep",
+      { case STypeRep(TTyCon(id)) =>
+        id
+      },
+    )
 
   private def toTemplateTypeRep(v: SValue): Either[String, Identifier] =
-    v expectE ("TemplateTypeRep", { case SRecord(_, _, JavaList(id)) =>
-      toIdentifier(id)
-    })
+    v.expectE(
+      "TemplateTypeRep",
+      { case SRecord(_, _, JavaList(id)) =>
+        toIdentifier(id)
+      },
+    )
 
   private def toRegisteredTemplate(v: SValue): Either[String, Identifier] =
-    v expectE ("RegisteredTemplate", { case SRecord(_, _, JavaList(sttr)) =>
-      toTemplateTypeRep(sttr)
-    })
+    v.expectE(
+      "RegisteredTemplate",
+      { case SRecord(_, _, JavaList(sttr)) =>
+        toTemplateTypeRep(sttr)
+      },
+    )
 
   private def toRegisteredTemplates(v: SValue): Either[String, Seq[Identifier]] =
-    v expectE ("list of RegisteredTemplate", { case SList(tpls) =>
-      tpls.traverse(toRegisteredTemplate).map(_.toImmArray.toSeq)
-    })
+    v.expectE(
+      "list of RegisteredTemplate",
+      { case SList(tpls) =>
+        tpls.traverse(toRegisteredTemplate).map(_.toImmArray.toSeq)
+      },
+    )
 
   private def toAnyContractId(v: SValue): Either[String, AnyContractId] =
-    v expectE ("AnyContractId", { case SRecord(_, _, JavaList(stid, scid)) =>
-      for {
-        templateId <- toTemplateTypeRep(stid)
-        contractId <- toContractId(scid)
-      } yield AnyContractId(templateId, contractId)
-    })
+    v.expectE(
+      "AnyContractId",
+      { case SRecord(_, _, JavaList(stid, scid)) =>
+        for {
+          templateId <- toTemplateTypeRep(stid)
+          contractId <- toContractId(scid)
+        } yield AnyContractId(templateId, contractId)
+      },
+    )
 
   private[this] def toAnyTemplate(v: SValue): Either[String, AnyTemplate] = {
     v match {
@@ -361,35 +379,45 @@ object Converter {
     }
 
   private def toAnyContractKey(v: SValue): Either[String, AnyContractKey] =
-    v expect ("AnyContractKey", { case SRecord(_, _, JavaList(SAny(_, v), _)) =>
-      AnyContractKey(v)
-    })
+    v.expect(
+      "AnyContractKey",
+      { case SRecord(_, _, JavaList(SAny(_, v), _)) =>
+        AnyContractKey(v)
+      },
+    )
 
   private[this] def toCreate(v: SValue): Either[String, CreateCommand] =
-    v expectE ("CreateCommand", { case SRecord(_, _, JavaList(sTpl)) =>
-      for {
-        anyTmpl <- toAnyTemplate(sTpl)
-        templateArg <- toLedgerRecord(anyTmpl.arg)
-      } yield CreateCommand(Some(toApiIdentifier(anyTmpl.ty)), Some(templateArg))
-    })
+    v.expectE(
+      "CreateCommand",
+      { case SRecord(_, _, JavaList(sTpl)) =>
+        for {
+          anyTmpl <- toAnyTemplate(sTpl)
+          templateArg <- toLedgerRecord(anyTmpl.arg)
+        } yield CreateCommand(Some(toApiIdentifier(anyTmpl.ty)), Some(templateArg))
+      },
+    )
 
   private[this] def toExercise(v: SValue): Either[String, ExerciseCommand] =
-    v expectE ("ExerciseCommand", { case SRecord(_, _, JavaList(sAnyContractId, sChoiceVal)) =>
-      for {
-        anyContractId <- toAnyContractId(sAnyContractId)
-        anyChoice <- toAnyChoice(sChoiceVal)
-        choiceArg <- toLedgerValue(anyChoice.arg)
-      } yield ExerciseCommand(
-        Some(toApiIdentifier(anyContractId.templateId)),
-        anyContractId.contractId.coid,
-        anyChoice.name,
-        Some(choiceArg),
-      )
-    })
+    v.expectE(
+      "ExerciseCommand",
+      { case SRecord(_, _, JavaList(sAnyContractId, sChoiceVal)) =>
+        for {
+          anyContractId <- toAnyContractId(sAnyContractId)
+          anyChoice <- toAnyChoice(sChoiceVal)
+          choiceArg <- toLedgerValue(anyChoice.arg)
+        } yield ExerciseCommand(
+          Some(toApiIdentifier(anyContractId.templateId)),
+          anyContractId.contractId.coid,
+          anyChoice.name,
+          Some(choiceArg),
+        )
+      },
+    )
 
   private[this] def toExerciseByKey(v: SValue): Either[String, ExerciseByKeyCommand] =
-    v expectE ("ExerciseByKeyCommand", {
-      case SRecord(_, _, JavaList(stplId, skeyVal, sChoiceVal)) =>
+    v.expectE(
+      "ExerciseByKeyCommand",
+      { case SRecord(_, _, JavaList(stplId, skeyVal, sChoiceVal)) =>
         for {
           tplId <- toTemplateTypeRep(stplId)
           keyVal <- toAnyContractKey(skeyVal)
@@ -402,22 +430,26 @@ object Converter {
           anyChoice.name,
           Some(choiceArg),
         )
-    })
+      },
+    )
 
   private[this] def toCreateAndExercise(v: SValue): Either[String, CreateAndExerciseCommand] =
-    v expectE ("CreateAndExerciseCommand", { case SRecord(_, _, JavaList(sTpl, sChoiceVal)) =>
-      for {
-        anyTmpl <- toAnyTemplate(sTpl)
-        templateArg <- toLedgerRecord(anyTmpl.arg)
-        anyChoice <- toAnyChoice(sChoiceVal)
-        choiceArg <- toLedgerValue(anyChoice.arg)
-      } yield CreateAndExerciseCommand(
-        Some(toApiIdentifier(anyTmpl.ty)),
-        Some(templateArg),
-        anyChoice.name,
-        Some(choiceArg),
-      )
-    })
+    v.expectE(
+      "CreateAndExerciseCommand",
+      { case SRecord(_, _, JavaList(sTpl, sChoiceVal)) =>
+        for {
+          anyTmpl <- toAnyTemplate(sTpl)
+          templateArg <- toLedgerRecord(anyTmpl.arg)
+          anyChoice <- toAnyChoice(sChoiceVal)
+          choiceArg <- toLedgerValue(anyChoice.arg)
+        } yield CreateAndExerciseCommand(
+          Some(toApiIdentifier(anyTmpl.ty)),
+          Some(templateArg),
+          anyChoice.name,
+          Some(choiceArg),
+        )
+      },
+    )
 
   private def toCommand(v: SValue): Either[String, Command] = {
     v match {
@@ -443,9 +475,12 @@ object Converter {
 
   private def toCommands(v: SValue): Either[String, Seq[Command]] =
     for {
-      cmdValues <- v expect ("[Command]", { case SList(cmdValues) =>
-        cmdValues
-      })
+      cmdValues <- v.expect(
+        "[Command]",
+        { case SList(cmdValues) =>
+          cmdValues
+        },
+      )
       commands <- cmdValues.traverse(toCommand)
     } yield commands.toImmArray.toSeq
 
diff --git a/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Runner.scala b/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Runner.scala
index 238c2f6e341..bab9d292a66 100644
--- a/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Runner.scala
+++ b/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Runner.scala
@@ -21,8 +21,6 @@ import scalaz.syntax.tag._
 import scalaz.syntax.std.boolean._
 import scalaz.syntax.std.option._
 
-import scala.language.higherKinds
-
 import scala.annotation.tailrec
 import scala.concurrent.{ExecutionContext, Future}
 import scala.concurrent.duration.FiniteDuration
@@ -653,12 +651,16 @@ object Runner extends StrictLogging {
     def trial(tries: Int, value: A): Future[B] =
       if (tries <= 1) notRetryable(value)
       else
-        retryable(value).flatMap(_ cata (Future.successful, {
-          Future {
-            try Thread.sleep(backoff(initialTries - tries + 1).toMillis)
-            catch { case _: InterruptedException => }
-          }.flatMap(_ => trial(tries - 1, value))
-        }))
+        retryable(value).flatMap(
+          _.cata(
+            Future.successful, {
+              Future {
+                try Thread.sleep(backoff(initialTries - tries + 1).toMillis)
+                catch { case _: InterruptedException => }
+              }.flatMap(_ => trial(tries - 1, value))
+            },
+          )
+        )
     Flow[A].mapAsync(parallelism)(trial(initialTries, _))
   }
 
@@ -668,7 +670,7 @@ object Runner extends StrictLogging {
     val ov = m get k
     f(ov) map {
       (ov, _) match {
-        case (_, Some(v)) => m updated (k, v)
+        case (_, Some(v)) => m.updated(k, v)
         case (None, None) => m
         case (Some(_), None) => m - k
       }
@@ -704,7 +706,10 @@ object Runner extends StrictLogging {
       party: String,
   )(implicit materializer: Materializer, executionContext: ExecutionContext): Future[SValue] = {
     val darMap = dar.all.toMap
-    val compiledPackages = PureCompiledPackages(darMap).right.get
+    val compiledPackages = PureCompiledPackages(darMap) match {
+      case Left(err) => throw new RuntimeException(s"Failed to compile packages: $err")
+      case Right(pkgs) => pkgs
+    }
     val trigger = Trigger.fromIdentifier(compiledPackages, triggerId) match {
       case Left(err) => throw new RuntimeException(s"Invalid trigger: $err")
       case Right(trigger) => trigger
diff --git a/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/UnfoldState.scala b/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/UnfoldState.scala
index e8919e86d23..a14293cc4c2 100644
--- a/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/UnfoldState.scala
+++ b/triggers/runner/src/main/scala/com/digitalasset/daml/lf/engine/trigger/UnfoldState.scala
@@ -16,7 +16,6 @@ import scala.annotation.tailrec
 import com.daml.scalautil.Statement.discard
 
 import scala.collection.compat._
-import scala.collection.generic.CanBuildFrom
 import scala.collection.immutable.{IndexedSeq, Iterable, LinearSeq}
 
 /** A variant of [[scalaz.CorecursiveList]] that emits a final state
@@ -42,7 +41,7 @@ private[trigger] sealed abstract class UnfoldState[+T, +A] {
   private[trigger] final def iterator(): Iterator[T \/ A] =
     new Iterator[T \/ A] {
       var last = some(step(init))
-      override def hasNext() = last.isDefined
+      override def hasNext = last.isDefined
       override def next() = last match {
         case Some(\/-((a, s))) =>
           last = Some(step(s))
@@ -55,8 +54,8 @@ private[trigger] sealed abstract class UnfoldState[+T, +A] {
       }
     }
 
-  final def runTo[FA](implicit cbf: CanBuildFrom[Nothing, A, FA]): (FA, T) = {
-    val b = cbf()
+  final def runTo[FA](implicit factory: Factory[A, FA]): (FA, T) = {
+    val b = factory.newBuilder
     val t = foreach(a => discard(b += a))
     (b.result(), t)
   }
@@ -76,7 +75,7 @@ private[trigger] object UnfoldState {
 
   implicit def `US bifunctor instance`: Bifunctor[UnfoldState] = new Bifunctor[UnfoldState] {
     override def bimap[A, B, C, D](fab: UnfoldState[A, B])(f: A => C, g: B => D) =
-      UnfoldState(fab.init)(fab.step andThen (_ bimap (f, (_ leftMap g))))
+      UnfoldState(fab.init)(fab.step andThen (_.bimap(f, (_ leftMap g))))
   }
 
   def fromLinearSeq[A](list: LinearSeq[A]): UnfoldState[Unit, A] =
@@ -175,12 +174,15 @@ private[trigger] object UnfoldState {
 
   private[this] def statefulMapConcatFun[T, A, B](f: FoldL[T, A, B]): T \/ A => Iterable[T \/ B] = {
     var mcFun: A => Iterable[T \/ B] = null
-    _ fold (zeroT => {
-      mcFun = mkMapConcatFun(zeroT, f)
-      Iterable.empty
-    }, { a =>
-      mcFun(a)
-    })
+    _.fold(
+      zeroT => {
+        mcFun = mkMapConcatFun(zeroT, f)
+        Iterable.empty
+      },
+      { a =>
+        mcFun(a)
+      },
+    )
   }
 
   private[this] def mkMapConcatFun[T, A, B](zero: T, f: FoldL[T, A, B]): A => Iterable[T \/ B] = {
@@ -196,7 +198,7 @@ private[trigger] object UnfoldState {
         override def iterator = new Iterator[T \/ B] {
           private[this] var last: Option[T \/ (B, bs.S)] = {
             val fst = step(bs.init)
-            fst fold (newT => t = newT, _ => ())
+            fst.fold(newT => t = newT, _ => ())
             Some(fst)
           }
 
@@ -204,7 +206,7 @@ private[trigger] object UnfoldState {
           // of what the client sees.  We could improve laziness by making it
           // "even", but it would be a little trickier, as `hasNext` would have
           // a forcing side-effect
-          override def hasNext() = last.isDefined
+          override def hasNext = last.isDefined
 
           override def next() =
             last match {
@@ -212,7 +214,7 @@ private[trigger] object UnfoldState {
                 val next = step(s)
                 // The assumption here is that statefulMapConcat's implementation
                 // will always read iterator to end before invoking on the next A
-                next fold (newT => t = newT, _ => ())
+                next.fold(newT => t = newT, _ => ())
                 last = Some(next)
                 \/-(b)
               case Some(et @ -\/(_)) =>
diff --git a/triggers/service/BUILD.bazel b/triggers/service/BUILD.bazel
index 6e6319ebd71..8e57bc85411 100644
--- a/triggers/service/BUILD.bazel
+++ b/triggers/service/BUILD.bazel
@@ -19,6 +19,32 @@ da_scala_library(
     name = "trigger-service",
     srcs = glob(["src/main/scala/**/*.scala"]),
     resources = glob(["src/main/resources/**/*"]),
+    scala_deps = [
+        "@maven//:com_chuusai_shapeless",
+        "@maven//:com_github_scopt_scopt",
+        "@maven//:com_lihaoyi_sourcecode",
+        "@maven//:com_typesafe_akka_akka_actor",
+        "@maven//:com_typesafe_akka_akka_actor_typed",
+        "@maven//:com_typesafe_akka_akka_http",
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:com_typesafe_akka_akka_http_spray_json",
+        "@maven//:com_typesafe_akka_akka_parsing",
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:com_typesafe_scala_logging_scala_logging",
+        "@maven//:io_spray_spray_json",
+        "@maven//:org_scalaz_scalaz_core",
+        "@maven//:org_tpolecat_doobie_core",
+        "@maven//:org_tpolecat_doobie_free",
+        "@maven//:org_tpolecat_doobie_postgres",
+        "@maven//:org_typelevel_cats_core",
+        "@maven//:org_typelevel_cats_effect",
+        "@maven//:org_typelevel_cats_free",
+        "@maven//:org_typelevel_cats_kernel",
+    ],
+    scala_runtime_deps = [
+        "@maven//:com_typesafe_akka_akka_slf4j",
+        "@maven//:org_tpolecat_doobie_postgres",
+    ],
     scalacopts = tsvc_main_scalacopts,
     # Uncomment this if/when the target is published to maven.
     # tags = ["maven_coordinates=com.daml:trigger-service:__VERSION__"],
@@ -26,9 +52,7 @@ da_scala_library(
     runtime_deps = [
         "@maven//:ch_qos_logback_logback_classic",
         "@maven//:ch_qos_logback_logback_core",
-        "@maven//:com_typesafe_akka_akka_slf4j_2_12",
         "@maven//:org_postgresql_postgresql",
-        "@maven//:org_tpolecat_doobie_postgres_2_12",
     ],
     deps = [
         "//daml-lf/archive:daml_lf_archive_reader",
@@ -51,29 +75,10 @@ da_scala_library(
         "//libs-scala/scala-utils",
         "//triggers/runner:trigger-runner-lib",
         "//triggers/service/auth:middleware-api",
-        "@maven//:com_chuusai_shapeless_2_12",
-        "@maven//:com_github_scopt_scopt_2_12",
-        "@maven//:com_lihaoyi_sourcecode_2_12",
-        "@maven//:com_typesafe_akka_akka_actor_2_12",
-        "@maven//:com_typesafe_akka_akka_actor_typed_2_12",
-        "@maven//:com_typesafe_akka_akka_http_2_12",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
-        "@maven//:com_typesafe_akka_akka_http_spray_json_2_12",
-        "@maven//:com_typesafe_akka_akka_parsing_2_12",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:com_typesafe_scala_logging_scala_logging_2_12",
+        "@maven//:com_typesafe_config",
         "@maven//:com_zaxxer_HikariCP",
-        "@maven//:io_spray_spray_json_2_12",
         "@maven//:org_flywaydb_flyway_core",
-        "@maven//:org_scalaz_scalaz_core_2_12",
         "@maven//:org_slf4j_slf4j_api",
-        "@maven//:org_tpolecat_doobie_core_2_12",
-        "@maven//:org_tpolecat_doobie_free_2_12",
-        "@maven//:org_tpolecat_doobie_postgres_2_12",
-        "@maven//:org_typelevel_cats_core_2_12",
-        "@maven//:org_typelevel_cats_effect_2_12",
-        "@maven//:org_typelevel_cats_free_2_12",
-        "@maven//:org_typelevel_cats_kernel_2_12",
     ],
 )
 
@@ -99,6 +104,15 @@ da_scala_library(
         ]
     ),
     resources = glob(["src/test/resources/**/*"]),
+    scala_deps = [
+        "@maven//:io_spray_spray_json",
+        "@maven//:org_scalactic_scalactic",
+        "@maven//:org_scalatest_scalatest",
+        "@maven//:org_scalaz_scalaz_core",
+        "@maven//:com_typesafe_akka_akka_actor_typed",
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:com_typesafe_akka_akka_parsing",
+    ],
     deps = [
         ":trigger-service",
         "//bazel_tools/runfiles:scala_runfiles",
@@ -129,20 +143,19 @@ da_scala_library(
         "//triggers/service/auth:oauth2-test-server",
         "@maven//:ch_qos_logback_logback_classic",
         "@maven//:com_auth0_java_jwt",
-        "@maven//:com_typesafe_akka_akka_actor_typed_2_12",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
-        "@maven//:com_typesafe_akka_akka_parsing_2_12",
         "@maven//:eu_rekawek_toxiproxy_toxiproxy_java_2_1_3",
-        "@maven//:io_spray_spray_json_2_12",
-        "@maven//:org_scalactic_scalactic_2_12",
-        "@maven//:org_scalatest_scalatest_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
     ],
 )
 
 da_scala_test_suite(
     name = "test",
     srcs = glob(["src/test-suite/scala/**/*.scala"]),
+    scala_deps = [
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:io_spray_spray_json",
+        "@maven//:org_scalatest_scalatest",
+        "@maven//:org_scalaz_scalaz_core",
+    ],
     deps = [
         ":trigger-service",
         ":trigger-service-tests",
@@ -165,12 +178,8 @@ da_scala_test_suite(
         "//libs-scala/postgresql-testing",
         "//libs-scala/resources",
         "//triggers/service/auth:oauth2-test-server",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
         "@maven//:eu_rekawek_toxiproxy_toxiproxy_java_2_1_3",
-        "@maven//:io_spray_spray_json_2_12",
         "@maven//:org_flywaydb_flyway_core",
-        "@maven//:org_scalatest_scalatest_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
     ],
 )
 
diff --git a/triggers/service/auth/BUILD.bazel b/triggers/service/auth/BUILD.bazel
index 70df8f44d93..e2fd4fd4960 100644
--- a/triggers/service/auth/BUILD.bazel
+++ b/triggers/service/auth/BUILD.bazel
@@ -6,6 +6,7 @@ load(
     "da_scala_binary",
     "da_scala_library",
     "da_scala_test",
+    "silencer_plugin",
 )
 
 exports_files(["release/oauth2-middleware-logback.xml"])
@@ -15,42 +16,65 @@ scalacopts = []
 da_scala_library(
     name = "oauth2-api",
     srcs = glob(["src/main/scala/com/daml/auth/oauth2/api/**/*.scala"]),
+    scala_deps = [
+        "@maven//:com_typesafe_akka_akka_actor",
+        "@maven//:com_typesafe_akka_akka_http",
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:com_typesafe_akka_akka_parsing",
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:io_spray_spray_json",
+    ],
     scalacopts = scalacopts,
     visibility = ["//visibility:public"],
-    deps = [
-        "@maven//:com_typesafe_akka_akka_actor_2_12",
-        "@maven//:com_typesafe_akka_akka_http_2_12",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
-        "@maven//:com_typesafe_akka_akka_parsing_2_12",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:io_spray_spray_json_2_12",
-    ],
 )
 
 da_scala_library(
     name = "middleware-api",
     srcs = glob(["src/main/scala/com/daml/auth/middleware/api/**/*.scala"]),
+    scala_deps = [
+        "@maven//:com_typesafe_akka_akka_actor",
+        "@maven//:com_typesafe_akka_akka_http",
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:com_typesafe_akka_akka_http_spray_json",
+        "@maven//:com_typesafe_akka_akka_parsing",
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:io_spray_spray_json",
+        "@maven//:org_scalaz_scalaz_core",
+    ],
     scalacopts = scalacopts,
     visibility = ["//visibility:public"],
     deps = [
         "//daml-lf/data",
         "//language-support/scala/bindings",
-        "@maven//:com_typesafe_akka_akka_actor_2_12",
-        "@maven//:com_typesafe_akka_akka_http_2_12",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
-        "@maven//:com_typesafe_akka_akka_http_spray_json_2_12",
-        "@maven//:com_typesafe_akka_akka_parsing_2_12",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:io_spray_spray_json_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
     ],
 )
 
 da_scala_library(
     name = "oauth2-middleware",
     srcs = glob(["src/main/scala/com/daml/auth/middleware/oauth2/**/*.scala"]),
+    plugins = [silencer_plugin],
     resources = glob(["src/main/resources/com/daml/auth/middleware/oauth2/**"]),
-    scalacopts = scalacopts,
+    scala_deps = [
+        "@maven//:com_github_scopt_scopt",
+        "@maven//:com_lihaoyi_fastparse",
+        "@maven//:com_lihaoyi_geny",
+        "@maven//:com_lihaoyi_os_lib",
+        "@maven//:com_lihaoyi_sjsonnet",
+        "@maven//:com_lihaoyi_ujson",
+        "@maven//:com_lihaoyi_upickle_core",
+        "@maven//:com_typesafe_akka_akka_actor",
+        "@maven//:com_typesafe_akka_akka_http",
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:com_typesafe_akka_akka_http_spray_json",
+        "@maven//:com_typesafe_akka_akka_parsing",
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:com_typesafe_scala_logging_scala_logging",
+        "@maven//:io_spray_spray_json",
+        "@maven//:org_scalaz_scalaz_core",
+    ],
+    scalacopts = scalacopts + [
+        "-P:silencer:lineContentFilters=import scala.collection.compat",
+    ],
     visibility = ["//visibility:public"],
     deps = [
         ":middleware-api",
@@ -62,22 +86,6 @@ da_scala_library(
         "//ledger/cli-opts",
         "//ledger/ledger-api-auth",
         "//libs-scala/ports",
-        "@maven//:com_github_scopt_scopt_2_12",
-        "@maven//:com_lihaoyi_fastparse_2_12",
-        "@maven//:com_lihaoyi_geny_2_12",
-        "@maven//:com_lihaoyi_os_lib_2_12",
-        "@maven//:com_lihaoyi_sjsonnet_2_12",
-        "@maven//:com_lihaoyi_ujson_2_12",
-        "@maven//:com_lihaoyi_upickle_core_2_12",
-        "@maven//:com_typesafe_akka_akka_actor_2_12",
-        "@maven//:com_typesafe_akka_akka_http_2_12",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
-        "@maven//:com_typesafe_akka_akka_http_spray_json_2_12",
-        "@maven//:com_typesafe_akka_akka_parsing_2_12",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:com_typesafe_scala_logging_scala_logging_2_12",
-        "@maven//:io_spray_spray_json_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
         "@maven//:org_slf4j_slf4j_api",
     ],
 )
@@ -97,6 +105,18 @@ da_scala_binary(
 da_scala_library(
     name = "oauth2-test-server",
     srcs = glob(["src/main/scala/com/daml/auth/oauth2/test/server/**/*.scala"]),
+    scala_deps = [
+        "@maven//:com_github_scopt_scopt",
+        "@maven//:com_typesafe_akka_akka_actor",
+        "@maven//:com_typesafe_akka_akka_http",
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:com_typesafe_akka_akka_http_spray_json",
+        "@maven//:com_typesafe_akka_akka_parsing",
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:com_typesafe_scala_logging_scala_logging",
+        "@maven//:io_spray_spray_json",
+        "@maven//:org_scalaz_scalaz_core",
+    ],
     scalacopts = scalacopts,
     visibility = ["//triggers/service:__subpackages__"],
     deps = [
@@ -105,15 +125,6 @@ da_scala_library(
         "//ledger-service/jwt",
         "//ledger/ledger-api-auth",
         "//libs-scala/ports",
-        "@maven//:com_github_scopt_scopt_2_12",
-        "@maven//:com_typesafe_akka_akka_actor_2_12",
-        "@maven//:com_typesafe_akka_akka_http_2_12",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
-        "@maven//:com_typesafe_akka_akka_http_spray_json_2_12",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:com_typesafe_scala_logging_scala_logging_2_12",
-        "@maven//:io_spray_spray_json_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
         "@maven//:org_slf4j_slf4j_api",
     ],
 )
@@ -132,6 +143,16 @@ da_scala_binary(
 da_scala_test(
     name = "oauth2-test-server-tests",
     srcs = glob(["src/test/scala/com/daml/auth/oauth2/test/server/**/*.scala"]),
+    scala_deps = [
+        "@maven//:com_typesafe_akka_akka_actor",
+        "@maven//:com_typesafe_akka_akka_http",
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:com_typesafe_akka_akka_http_spray_json",
+        "@maven//:com_typesafe_akka_akka_parsing",
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:io_spray_spray_json",
+        "@maven//:org_scalaz_scalaz_core",
+    ],
     scalacopts = scalacopts,
     deps = [
         ":oauth2-api",
@@ -145,20 +166,23 @@ da_scala_test(
         "//libs-scala/adjustable-clock",
         "//libs-scala/ports",
         "//libs-scala/resources",
-        "@maven//:com_typesafe_akka_akka_actor_2_12",
-        "@maven//:com_typesafe_akka_akka_http_2_12",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
-        "@maven//:com_typesafe_akka_akka_http_spray_json_2_12",
-        "@maven//:com_typesafe_akka_akka_parsing_2_12",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:io_spray_spray_json_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
     ],
 )
 
 da_scala_test(
     name = "oauth2-middleware-tests",
     srcs = glob(["src/test/scala/com/daml/auth/middleware/oauth2/**/*.scala"]),
+    scala_deps = [
+        "@maven//:com_typesafe_akka_akka_actor",
+        "@maven//:com_typesafe_akka_akka_http",
+        "@maven//:com_typesafe_akka_akka_http_core",
+        "@maven//:com_typesafe_akka_akka_http_spray_json",
+        "@maven//:com_typesafe_akka_akka_parsing",
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:com_typesafe_scala_logging_scala_logging",
+        "@maven//:io_spray_spray_json",
+        "@maven//:org_scalaz_scalaz_core",
+    ],
     scalacopts = scalacopts,
     deps = [
         ":middleware-api",
@@ -177,14 +201,5 @@ da_scala_test(
         "//libs-scala/resources",
         "//libs-scala/scala-utils",
         "@maven//:com_auth0_java_jwt",
-        "@maven//:com_typesafe_akka_akka_actor_2_12",
-        "@maven//:com_typesafe_akka_akka_http_2_12",
-        "@maven//:com_typesafe_akka_akka_http_core_2_12",
-        "@maven//:com_typesafe_akka_akka_http_spray_json_2_12",
-        "@maven//:com_typesafe_akka_akka_parsing_2_12",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:com_typesafe_scala_logging_scala_logging_2_12",
-        "@maven//:io_spray_spray_json_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
     ],
 )
diff --git a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/api/Client.scala b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/api/Client.scala
index 6fc591279b4..d6d9c760b70 100644
--- a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/api/Client.scala
+++ b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/api/Client.scala
@@ -48,7 +48,7 @@ class Client(config: Client.Config) {
     * Note, a GET request on the `callbackUri` must map to this route.
     */
   val callbackHandler: Route =
-    parameters('state.as[UUID]) { requestId =>
+    parameters(Symbol("state").as[UUID]) { requestId =>
       callbacks.pop(requestId) match {
         case None =>
           complete(StatusCodes.NotFound)
diff --git a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/api/Request.scala b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/api/Request.scala
index 709b58f15bb..134e3ee0c57 100644
--- a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/api/Request.scala
+++ b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/api/Request.scala
@@ -13,6 +13,7 @@ import com.daml.ledger.api.refinements.ApiTypes.{ApplicationId, Party}
 import scalaz.{@@, Tag}
 import spray.json._
 
+import scala.collection.compat.immutable.LazyList
 import scala.collection.mutable.ArrayBuffer
 import scala.concurrent._
 import scala.util.Try
@@ -42,10 +43,10 @@ object Request {
       applicationId: Option[ApplicationId],
   ) {
     def toQueryString() = {
-      val adminS = if (admin) Stream("admin") else Stream()
-      val actAsS = actAs.toStream.map(party => s"actAs:$party")
-      val readAsS = readAs.toStream.map(party => s"readAs:$party")
-      val applicationIdS = applicationId.toList.toStream.map(appId => s"applicationId:$appId")
+      val adminS = if (admin) LazyList("admin") else LazyList()
+      val actAsS = actAs.to(LazyList).map(party => s"actAs:$party")
+      val readAsS = readAs.to(LazyList).map(party => s"readAs:$party")
+      val applicationIdS = applicationId.toList.to(LazyList).map(appId => s"applicationId:$appId")
       (adminS ++ actAsS ++ readAsS ++ applicationIdS).mkString(" ")
     }
   }
@@ -85,7 +86,7 @@ object Request {
       Claims(admin, actAs.toList, readAs.toList, applicationId)
     }
     implicit val marshalRequestEntity: Marshaller[Claims, String] =
-      Marshaller.opaque(_.toQueryString)
+      Marshaller.opaque(_.toQueryString())
     implicit val unmarshalHttpEntity: Unmarshaller[String, Claims] =
       Unmarshaller { _ => s => Future.fromTry(Try(apply(s))) }
   }
@@ -128,7 +129,7 @@ object Response {
 
   object Login {
     val callbackParameters: Directive1[Login] =
-      parameters('error, 'error_description ?)
+      parameters(Symbol("error"), Symbol("error_description") ?)
         .as[LoginError](LoginError)
         .or(provide(LoginSuccess))
   }
diff --git a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/Config.scala b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/Config.scala
index a95bffc1da6..1c1200b4fcd 100644
--- a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/Config.scala
+++ b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/Config.scala
@@ -62,7 +62,7 @@ object Config {
       tokenVerifier = null,
     )
 
-  def parseConfig(args: Seq[String]): Option[Config] =
+  def parseConfig(args: collection.Seq[String]): Option[Config] =
     configParser.parse(args, Empty)
 
   @SuppressWarnings(Array("org.wartremover.warts.NonUnitStatements"))
@@ -123,7 +123,8 @@ object Config {
         .action((x, c) => c.copy(oauthRefreshTemplate = Some(Paths.get(x))))
         .text("OAuth2 refresh request Jsonnet template")
 
-      opt[String]("id").hidden
+      opt[String]("id")
+        .hidden()
         .action((x, c) => c.copy(clientId = x))
         .withFallback(() => sys.env.getOrElse("DAML_CLIENT_ID", ""))
         .validate(x =>
@@ -131,7 +132,8 @@ object Config {
           else success
         )
 
-      opt[String]("secret").hidden
+      opt[String]("secret")
+        .hidden()
         .action((x, c) => c.copy(clientSecret = x))
         .withFallback(() => sys.env.getOrElse("DAML_CLIENT_SECRET", ""))
         .validate(x =>
diff --git a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/RequestTemplates.scala b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/RequestTemplates.scala
index 69cfc209abe..13a1a0eb113 100644
--- a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/RequestTemplates.scala
+++ b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/RequestTemplates.scala
@@ -11,6 +11,7 @@ import com.daml.auth.middleware.api.Request
 import com.daml.auth.middleware.api.Tagged.RefreshToken
 import com.daml.ledger.api.refinements.ApiTypes.{ApplicationId, Party}
 
+import scala.collection.compat._
 import scala.collection.concurrent.TrieMap
 import scala.io.{BufferedSource, Source}
 import scala.util.Try
@@ -88,7 +89,7 @@ private[oauth2] class RequestTemplates(
   /** Convert a JSON value to a string mapping representing request parameters.
     */
   private def toRequestParams(value: ujson.Value): Try[Map[String, String]] =
-    Try(value.obj.mapValues(_.str).toMap)
+    Try(value.obj.view.mapValues(_.str).toMap)
 
   private def createRequest(
       template: (String, sjsonnet.Path),
diff --git a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/Server.scala b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/Server.scala
index 6eb36ceef21..691d6f767f4 100644
--- a/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/Server.scala
+++ b/triggers/service/auth/src/main/scala/com/daml/auth/middleware/oauth2/Server.scala
@@ -27,6 +27,7 @@ import com.daml.ports.{Port, PortFiles}
 import scalaz.{-\/, \/-}
 import spray.json._
 
+import scala.collection.compat._
 import scala.concurrent.{ExecutionContext, Future}
 import scala.language.postfixOps
 import scala.util.{Failure, Success, Try}
@@ -97,7 +98,7 @@ class Server(config: Config) extends StrictLogging {
     }
 
   private val auth: Route =
-    parameters('claims.as[Request.Claims])
+    parameters(Symbol("claims").as[Request.Claims])
       .as[Request.Auth](Request.Auth) { auth =>
         optionalToken {
           case Some(token)
@@ -119,14 +120,18 @@ class Server(config: Config) extends StrictLogging {
     new RequestStore(config.maxLoginRequests, config.loginTimeout)
 
   private val login: Route =
-    parameters('redirect_uri.as[Uri] ?, 'claims.as[Request.Claims], 'state ?)
+    parameters(
+      Symbol("redirect_uri").as[Uri] ?,
+      Symbol("claims").as[Request.Claims],
+      Symbol("state") ?,
+    )
       .as[Request.Login](Request.Login) { login =>
         extractRequest { request =>
           val requestId = UUID.randomUUID
           val stored = requests.put(
             requestId,
             login.redirectUri.map { redirectUri =>
-              var query = redirectUri.query().to[Seq]
+              var query = redirectUri.query().to(Seq)
               login.state.foreach(x => query ++= Seq("state" -> x))
               redirectUri.withQuery(Uri.Query(query: _*))
             },
@@ -166,7 +171,7 @@ class Server(config: Config) extends StrictLogging {
         }
 
         concat(
-          parameters('code, 'state ?)
+          parameters(Symbol("code"), Symbol("state") ?)
             .as[OAuthResponse.Authorize](OAuthResponse.Authorize) { authorize =>
               popRequest(authorize.state) { redirectUri =>
                 extractRequest { request =>
@@ -219,12 +224,17 @@ class Server(config: Config) extends StrictLogging {
                 }
               }
             },
-          parameters('error, 'error_description ?, 'error_uri.as[Uri] ?, 'state ?)
+          parameters(
+            Symbol("error"),
+            Symbol("error_description") ?,
+            Symbol("error_uri").as[Uri] ?,
+            Symbol("state") ?,
+          )
             .as[OAuthResponse.Error](OAuthResponse.Error) { error =>
               popRequest(error.state) {
                 case Some(redirectUri) =>
                   val uri = redirectUri.withQuery {
-                    var params = redirectUri.query().to[Seq]
+                    var params = redirectUri.query().to(Seq)
                     params ++= Seq("error" -> error.error)
                     error.errorDescription.foreach(x => params ++= Seq("error_description" -> x))
                     Uri.Query(params: _*)
diff --git a/triggers/service/auth/src/main/scala/com/daml/auth/oauth2/test/server/Config.scala b/triggers/service/auth/src/main/scala/com/daml/auth/oauth2/test/server/Config.scala
index 543b6f2acaf..7ca20fa10be 100644
--- a/triggers/service/auth/src/main/scala/com/daml/auth/oauth2/test/server/Config.scala
+++ b/triggers/service/auth/src/main/scala/com/daml/auth/oauth2/test/server/Config.scala
@@ -22,7 +22,7 @@ object Config {
   private val Empty =
     Config(port = Port.Dynamic, ledgerId = null, jwtSecret = null, clock = None)
 
-  def parseConfig(args: Seq[String]): Option[Config] =
+  def parseConfig(args: collection.Seq[String]): Option[Config] =
     configParser.parse(args, Empty)
 
   @SuppressWarnings(Array("org.wartremover.warts.NonUnitStatements"))
diff --git a/triggers/service/auth/src/main/scala/com/daml/auth/oauth2/test/server/Server.scala b/triggers/service/auth/src/main/scala/com/daml/auth/oauth2/test/server/Server.scala
index d6b5baada51..808357d8b11 100644
--- a/triggers/service/auth/src/main/scala/com/daml/auth/oauth2/test/server/Server.scala
+++ b/triggers/service/auth/src/main/scala/com/daml/auth/oauth2/test/server/Server.scala
@@ -120,7 +120,6 @@ class Server(config: Config) {
     }
   }
 
-  import Request.Token.unmarshalHttpEntity
   import Request.Refresh.unmarshalHttpEntity
   implicit val unmarshal: Unmarshaller[String, Uri] = Unmarshaller.strict(Uri(_))
 
@@ -128,12 +127,12 @@ class Server(config: Config) {
     path("authorize") {
       get {
         parameters(
-          'response_type,
-          'client_id,
-          'redirect_uri.as[Uri],
-          'scope ?,
-          'state ?,
-          'audience.as[Uri] ?,
+          Symbol("response_type"),
+          Symbol("client_id"),
+          Symbol("redirect_uri").as[Uri],
+          Symbol("scope") ?,
+          Symbol("state") ?,
+          Symbol("audience").as[Uri] ?,
         )
           .as[Request.Authorize](Request.Authorize) { request =>
             val payload = toPayload(request)
diff --git a/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/Resources.scala b/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/Resources.scala
index 101972cab77..14e67d10928 100644
--- a/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/Resources.scala
+++ b/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/Resources.scala
@@ -72,7 +72,7 @@ object Resources {
               concat(
                 path("authorize") {
                   get {
-                    parameters('claims.as[Claims]) { claims =>
+                    parameters(Symbol("claims").as[Claims]) { claims =>
                       client.authorize(claims) {
                         case Client.Authorized(authorization) =>
                           import akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport._
@@ -93,7 +93,7 @@ object Resources {
                 },
                 path("login") {
                   get {
-                    parameters('claims.as[Claims]) { claims =>
+                    parameters(Symbol("claims").as[Claims]) { claims =>
                       import akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport._
                       import com.daml.auth.middleware.api.JsonProtocol.ResponseLoginFormat
                       client.login(claims, login => complete(StatusCodes.OK, login))
diff --git a/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/TestMiddleware.scala b/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/TestMiddleware.scala
index 23a5e2858de..88593da30b1 100644
--- a/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/TestMiddleware.scala
+++ b/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/TestMiddleware.scala
@@ -391,7 +391,7 @@ class TestMiddlewareClientLimitedCallbackStore
           .withScheme("http")
           .withAuthority(host.getHostName, host.getPort)
           .withPath(Uri.Path./("login"))
-          .withQuery(Uri.Query("claims" -> claims.toQueryString))
+          .withQuery(Uri.Query("claims" -> claims.toQueryString()))
         val req = HttpRequest(uri = uri)
         Http().singleRequest(req)
       }
@@ -451,7 +451,7 @@ class TestMiddlewareClientNoRedirectToLogin
         .withScheme("http")
         .withAuthority(host.getHostName, host.getPort)
         .withPath(Uri.Path./("authorize"))
-        .withQuery(Uri.Query("claims" -> claims.toQueryString))
+        .withQuery(Uri.Query("claims" -> claims.toQueryString()))
       val req = HttpRequest(uri = uri)
       for {
         resp <- Http().singleRequest(req)
@@ -461,7 +461,7 @@ class TestMiddlewareClientNoRedirectToLogin
         challenge = wwwAuthenticate.challenges
           .find(_.scheme == Response.authenticateChallengeName)
           .value
-        _ = challenge.params.keys should contain allOf ("auth", "login")
+        _ = challenge.params.keys should contain.allOf("auth", "login")
         authUri = challenge.params.get("auth").value
         loginUri = challenge.params.get("login").value
         headerChallenge = Response.AuthenticateChallenge(
@@ -499,7 +499,7 @@ class TestMiddlewareClientYesRedirectToLogin
         .withScheme("http")
         .withAuthority(host.getHostName, host.getPort)
         .withPath(Uri.Path./("authorize"))
-        .withQuery(Uri.Query("claims" -> claims.toQueryString))
+        .withQuery(Uri.Query("claims" -> claims.toQueryString()))
       val req = HttpRequest(uri = uri)
       for {
         resp <- Http().singleRequest(req)
@@ -531,7 +531,7 @@ class TestMiddlewareClientAutoRedirectToLogin
         .withScheme("http")
         .withAuthority(host.getHostName, host.getPort)
         .withPath(Uri.Path./("authorize"))
-        .withQuery(Uri.Query("claims" -> claims.toQueryString))
+        .withQuery(Uri.Query("claims" -> claims.toQueryString()))
       val acceptHtml: HttpHeader = headers.Accept(MediaTypes.`text/html`)
       val req = HttpRequest(uri = uri, headers = immutable.Seq(acceptHtml))
       for {
@@ -548,7 +548,7 @@ class TestMiddlewareClientAutoRedirectToLogin
         .withScheme("http")
         .withAuthority(host.getHostName, host.getPort)
         .withPath(Uri.Path./("authorize"))
-        .withQuery(Uri.Query("claims" -> claims.toQueryString))
+        .withQuery(Uri.Query("claims" -> claims.toQueryString()))
       val acceptHtml: HttpHeader = headers.Accept(MediaTypes.`application/json`)
       val req = HttpRequest(uri = uri, headers = immutable.Seq(acceptHtml))
       for {
diff --git a/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/TestRequestTemplates.scala b/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/TestRequestTemplates.scala
index c9861f45acc..2e4bb74590b 100644
--- a/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/TestRequestTemplates.scala
+++ b/triggers/service/auth/src/test/scala/com/daml/auth/middleware/oauth2/TestRequestTemplates.scala
@@ -54,8 +54,15 @@ class TestRequestTemplates
       val requestId = UUID.randomUUID()
       val redirectUri = Uri("https://localhost/cb")
       val params = templates.createAuthRequest(claims, requestId, redirectUri).success.value
-      params.keys should contain only ("audience", "client_id", "redirect_uri", "response_type", "scope", "state")
-      params should contain allOf (
+      params.keys should contain.only(
+        "audience",
+        "client_id",
+        "redirect_uri",
+        "response_type",
+        "scope",
+        "state",
+      )
+      params should contain.allOf(
         "audience" -> "https://daml.com/ledger-api",
         "client_id" -> clientId,
         "redirect_uri" -> redirectUri.toString,
@@ -70,8 +77,15 @@ class TestRequestTemplates
       val requestId = UUID.randomUUID()
       val redirectUri = Uri("https://localhost/cb")
       val params = templates.createAuthRequest(claims, requestId, redirectUri).success.value
-      params.keys should contain only ("audience", "client_id", "redirect_uri", "response_type", "scope", "state")
-      params should contain allOf (
+      params.keys should contain.only(
+        "audience",
+        "client_id",
+        "redirect_uri",
+        "response_type",
+        "scope",
+        "state",
+      )
+      params should contain.allOf(
         "audience" -> "https://daml.com/ledger-api",
         "client_id" -> clientId,
         "redirect_uri" -> redirectUri.toString,
@@ -79,7 +93,7 @@ class TestRequestTemplates
         "state" -> requestId.toString,
       )
       val scope = params.valueAt("scope").split(" ")
-      scope should contain allOf ("admin", "offline_access")
+      scope should contain.allOf("admin", "offline_access")
     }
     "handle actAs claims" in {
       val templates = getTemplates()
@@ -92,8 +106,15 @@ class TestRequestTemplates
       val requestId = UUID.randomUUID()
       val redirectUri = Uri("https://localhost/cb")
       val params = templates.createAuthRequest(claims, requestId, redirectUri).success.value
-      params.keys should contain only ("audience", "client_id", "redirect_uri", "response_type", "scope", "state")
-      params should contain allOf (
+      params.keys should contain.only(
+        "audience",
+        "client_id",
+        "redirect_uri",
+        "response_type",
+        "scope",
+        "state",
+      )
+      params should contain.allOf(
         "audience" -> "https://daml.com/ledger-api",
         "client_id" -> clientId,
         "redirect_uri" -> redirectUri.toString,
@@ -101,7 +122,7 @@ class TestRequestTemplates
         "state" -> requestId.toString,
       )
       val scope = params.valueAt("scope").split(" ")
-      scope should contain allOf ("actAs:Alice", "actAs:Bob", "offline_access")
+      scope should contain.allOf("actAs:Alice", "actAs:Bob", "offline_access")
     }
     "handle readAs claims" in {
       val templates = getTemplates()
@@ -114,8 +135,15 @@ class TestRequestTemplates
       val requestId = UUID.randomUUID()
       val redirectUri = Uri("https://localhost/cb")
       val params = templates.createAuthRequest(claims, requestId, redirectUri).success.value
-      params.keys should contain only ("audience", "client_id", "redirect_uri", "response_type", "scope", "state")
-      params should contain allOf (
+      params.keys should contain.only(
+        "audience",
+        "client_id",
+        "redirect_uri",
+        "response_type",
+        "scope",
+        "state",
+      )
+      params should contain.allOf(
         "audience" -> "https://daml.com/ledger-api",
         "client_id" -> clientId,
         "redirect_uri" -> redirectUri.toString,
@@ -123,7 +151,7 @@ class TestRequestTemplates
         "state" -> requestId.toString,
       )
       val scope = params.valueAt("scope").split(" ")
-      scope should contain allOf ("offline_access", "readAs:Alice", "readAs:Bob")
+      scope should contain.allOf("offline_access", "readAs:Alice", "readAs:Bob")
     }
     "handle an applicationId claim" in {
       val templates = getTemplates()
@@ -136,8 +164,15 @@ class TestRequestTemplates
       val requestId = UUID.randomUUID()
       val redirectUri = Uri("https://localhost/cb")
       val params = templates.createAuthRequest(claims, requestId, redirectUri).success.value
-      params.keys should contain only ("audience", "client_id", "redirect_uri", "response_type", "scope", "state")
-      params should contain allOf (
+      params.keys should contain.only(
+        "audience",
+        "client_id",
+        "redirect_uri",
+        "response_type",
+        "scope",
+        "state",
+      )
+      params should contain.allOf(
         "audience" -> "https://daml.com/ledger-api",
         "client_id" -> clientId,
         "redirect_uri" -> redirectUri.toString,
@@ -145,7 +180,7 @@ class TestRequestTemplates
         "state" -> requestId.toString,
       )
       val scope = params.valueAt("scope").split(" ")
-      scope should contain allOf ("applicationId:application-id", "offline_access")
+      scope should contain.allOf("applicationId:application-id", "offline_access")
     }
   }
   "the builtin token template" should {
diff --git a/triggers/service/auth/src/test/scala/com/daml/auth/oauth2/test/server/Client.scala b/triggers/service/auth/src/test/scala/com/daml/auth/oauth2/test/server/Client.scala
index 3ffc9f94877..56fdf4ad4d6 100644
--- a/triggers/service/auth/src/test/scala/com/daml/auth/oauth2/test/server/Client.scala
+++ b/triggers/service/auth/src/test/scala/com/daml/auth/oauth2/test/server/Client.scala
@@ -101,36 +101,42 @@ object Client {
       },
       path("cb") {
         get {
-          parameters('code, 'state ?).as[Response.Authorize](Response.Authorize) { resp =>
-            extractRequest { request =>
-              // We got the code, now request a token
-              val body = Request.Token(
-                grantType = "authorization_code",
-                code = resp.code,
-                redirectUri = toRedirectUri(request.uri),
-                clientId = config.clientId,
-                clientSecret = config.clientSecret,
-              )
-              val f = for {
-                entity <- Marshal(body).to[RequestEntity]
-                req = HttpRequest(
-                  uri = config.authServerUrl.withPath(Path./("token")),
-                  entity = entity,
-                  method = HttpMethods.POST,
-                )
-                resp <- Http().singleRequest(req)
-                tokenResp <- Unmarshal(resp).to[Response.Token]
-              } yield tokenResp
-              onSuccess(f) { tokenResp =>
-                // Now we have the access_token and potentially the refresh token. At this point,
-                // we would start the trigger.
-                complete(
-                  AccessResponse(tokenResp.accessToken, tokenResp.refreshToken.get): Response
+          parameters(Symbol("code"), Symbol("state") ?).as[Response.Authorize](Response.Authorize) {
+            resp =>
+              extractRequest { request =>
+                // We got the code, now request a token
+                val body = Request.Token(
+                  grantType = "authorization_code",
+                  code = resp.code,
+                  redirectUri = toRedirectUri(request.uri),
+                  clientId = config.clientId,
+                  clientSecret = config.clientSecret,
                 )
+                val f = for {
+                  entity <- Marshal(body).to[RequestEntity]
+                  req = HttpRequest(
+                    uri = config.authServerUrl.withPath(Path./("token")),
+                    entity = entity,
+                    method = HttpMethods.POST,
+                  )
+                  resp <- Http().singleRequest(req)
+                  tokenResp <- Unmarshal(resp).to[Response.Token]
+                } yield tokenResp
+                onSuccess(f) { tokenResp =>
+                  // Now we have the access_token and potentially the refresh token. At this point,
+                  // we would start the trigger.
+                  complete(
+                    AccessResponse(tokenResp.accessToken, tokenResp.refreshToken.get): Response
+                  )
+                }
               }
-            }
           } ~
-            parameters('error, 'error_description ?, 'error_uri.as[Uri] ?, 'state ?)
+            parameters(
+              Symbol("error"),
+              Symbol("error_description") ?,
+              Symbol("error_uri").as[Uri] ?,
+              Symbol("state") ?,
+            )
               .as[Response.Error](Response.Error) { resp =>
                 complete(ErrorResponse(resp.error): Response)
               }
diff --git a/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Request.scala b/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Request.scala
index a751112ad51..9b3fb6cf948 100644
--- a/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Request.scala
+++ b/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Request.scala
@@ -13,7 +13,7 @@ object Request {
   implicit object IdentifierFormat extends JsonFormat[Identifier] {
     def read(value: JsValue): Identifier = value match {
       case JsString(s) =>
-        Identifier fromString s fold (deserializationError(_), identity)
+        Identifier.fromString(s).fold(deserializationError(_), identity)
       case _ => deserializationError("Expected trigger identifier of the form pkgid:mod:name")
     }
     def write(id: Identifier): JsValue = JsString(id.toString)
diff --git a/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Server.scala b/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Server.scala
index 9d000e6ad08..2d6891e18bd 100644
--- a/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Server.scala
+++ b/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/Server.scala
@@ -324,7 +324,7 @@ class Server(
             },
             // List triggers currently running for the given party.
             get {
-              parameters('party.as[Party]) { party =>
+              parameters(Symbol("party").as[Party]) { party =>
                 val claims = Claims(readAs = List(party))
                 authorize(claims) { _ =>
                   extractExecutionContext { implicit ec =>
diff --git a/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/TriggerRunnerImpl.scala b/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/TriggerRunnerImpl.scala
index 2c76b422e3f..b55419966cd 100644
--- a/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/TriggerRunnerImpl.scala
+++ b/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/TriggerRunnerImpl.scala
@@ -164,7 +164,7 @@ object TriggerRunnerImpl {
               // here. It won't receive it (many Bothans died to bring
               // us this information).
               logger.info(s"Trigger $name stopped")
-              killSwitch.shutdown
+              killSwitch.shutdown()
               Behaviors.stopped
             case (_, PreRestart) =>
               // No need to send any messages here. The server has
diff --git a/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/dao/DbTriggerDao.scala b/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/dao/DbTriggerDao.scala
index cf8b6495953..782f99fe02e 100644
--- a/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/dao/DbTriggerDao.scala
+++ b/triggers/service/src/main/scala/com/digitalasset/daml/lf/engine/trigger/dao/DbTriggerDao.scala
@@ -217,7 +217,7 @@ final class DbTriggerDao private (dataSource: DataSource with Closeable, xa: Con
   private def run[T](query: ConnectionIO[T], errorContext: String = "")(implicit
       ec: ExecutionContext
   ): Future[T] = {
-    query.transact(xa).unsafeToFuture.recoverWith { case NonFatal(e) =>
+    query.transact(xa).unsafeToFuture().recoverWith { case NonFatal(e) =>
       Future.failed(new DatabaseError(errorContext, e))
     }
   }
@@ -287,10 +287,13 @@ final class DbTriggerDao private (dataSource: DataSource with Closeable, xa: Con
 
   @throws[IOException]
   override def close() =
-    destroyPermanently() fold ({
-      case e: IOException => throw e
-      case e => throw new IOException(e)
-    }, identity)
+    destroyPermanently().fold(
+      {
+        case e: IOException => throw e
+        case e => throw new IOException(e)
+      },
+      identity,
+    )
 }
 
 object DbTriggerDao {
diff --git a/triggers/service/src/test/scala/com/digitalasset/daml/lf/engine/trigger/TriggerServiceFixture.scala b/triggers/service/src/test/scala/com/digitalasset/daml/lf/engine/trigger/TriggerServiceFixture.scala
index 878ac2027e7..6988445e883 100644
--- a/triggers/service/src/test/scala/com/digitalasset/daml/lf/engine/trigger/TriggerServiceFixture.scala
+++ b/triggers/service/src/test/scala/com/digitalasset/daml/lf/engine/trigger/TriggerServiceFixture.scala
@@ -85,7 +85,8 @@ trait HttpCookies extends BeforeAndAfterEach { this: Suite =>
     Http()
       .singleRequest {
         if (cookieJar.nonEmpty) {
-          val cookies = headers.Cookie(values = cookieJar.to[Seq]: _*)
+          val hd +: tl = cookieJar.view.map(headers.HttpCookiePair(_)).toSeq
+          val cookies = headers.Cookie(hd, tl: _*)
           request.addHeader(cookies)
         } else {
           request
@@ -422,7 +423,7 @@ trait TriggerDaoPostgresFixture
   }
 
   override protected def afterAll(): Unit = {
-    triggerDao.destroyPermanently() fold (fail(_), identity)
+    triggerDao.destroyPermanently().fold(fail(_), identity)
 
     super.afterAll()
   }
diff --git a/triggers/tests/BUILD.bazel b/triggers/tests/BUILD.bazel
index c49713bdd7e..0925323d158 100644
--- a/triggers/tests/BUILD.bazel
+++ b/triggers/tests/BUILD.bazel
@@ -6,6 +6,7 @@ load(
     "da_scala_binary",
     "da_scala_library",
     "da_scala_test",
+    "silencer_plugin",
 )
 load(
     "//bazel_tools/client_server:client_server_test.bzl",
@@ -78,6 +79,16 @@ da_scala_library(
         "src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractFuncTests.scala",
         "src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractTriggerTest.scala",
     ],
+    plugins = [silencer_plugin],
+    scala_deps = [
+        "@maven//:com_typesafe_akka_akka_stream",
+        "@maven//:org_scalactic_scalactic",
+        "@maven//:org_scalatest_scalatest",
+        "@maven//:org_scalaz_scalaz_core",
+    ],
+    scalacopts = [
+        "-P:silencer:lineContentFilters=import scala.collection.compat",
+    ],
     deps = [
         "//bazel_tools/runfiles:scala_runfiles",
         "//daml-lf/archive:daml_lf_archive_reader",
@@ -103,10 +114,6 @@ da_scala_library(
         "//libs-scala/ports",
         "//libs-scala/resources",
         "//triggers/runner:trigger-runner-lib",
-        "@maven//:com_typesafe_akka_akka_stream_2_12",
-        "@maven//:org_scalactic_scalactic_2_12",
-        "@maven//:org_scalatest_scalatest_2_12",
-        "@maven//:org_scalaz_scalaz_core_2_12",
     ],
 )
 
@@ -131,6 +138,12 @@ da_scala_library(
             "//ledger/test-common/test-certificates",
         ],
         resources = ["//triggers/runner:src/main/resources/logback.xml"],
+        scala_deps = [
+            "@maven//:com_typesafe_akka_akka_stream",
+            "@maven//:org_scalacheck_scalacheck",
+            "@maven//:org_scalatestplus_scalacheck_1_14",
+            "@maven//:org_scalaz_scalaz_core",
+        ],
         deps = [
             ":test-utils",
             "//bazel_tools/runfiles:scala_runfiles",
@@ -158,10 +171,6 @@ da_scala_library(
             "//libs-scala/resources",
             "//libs-scala/scalatest-utils",
             "//triggers/runner:trigger-runner-lib",
-            "@maven//:com_typesafe_akka_akka_stream_2_12",
-            "@maven//:org_scalacheck_scalacheck_2_12",
-            "@maven//:org_scalatestplus_scalacheck_1_14_2_12",
-            "@maven//:org_scalaz_scalaz_core_2_12",
         ],
     )
     for lf_version in DAML_LF_VERSIONS
diff --git a/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractFuncTests.scala b/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractFuncTests.scala
index 4ec478e20af..c3142c571a5 100644
--- a/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractFuncTests.scala
+++ b/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractFuncTests.scala
@@ -9,7 +9,6 @@ import com.daml.lf.speedy.SValue
 import com.daml.lf.speedy.SValue._
 import com.daml.lf.value.Value.ContractId
 import com.daml.ledger.api.testing.utils.SuiteResourceManagementAroundAll
-import com.daml.ledger.api.v1.commands._
 import com.daml.ledger.api.v1.commands.CreateCommand
 import com.daml.ledger.api.v1.{value => LedgerApi}
 import com.daml.platform.services.time.TimeProviderType
diff --git a/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractTriggerTest.scala b/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractTriggerTest.scala
index d89de69a78d..a3403e854c1 100644
--- a/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractTriggerTest.scala
+++ b/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/AbstractTriggerTest.scala
@@ -9,7 +9,7 @@ package test
 import java.util.UUID
 
 import akka.stream.scaladsl.Sink
-import com.daml.bazeltools.BazelRunfiles.requiredResource
+import com.daml.bazeltools.BazelRunfiles
 import com.daml.ledger.api.refinements.ApiTypes.ApplicationId
 import com.daml.ledger.api.v1.command_service.SubmitAndWaitRequest
 import com.daml.ledger.api.v1.commands.{Command, CreateCommand, ExerciseCommand, _}
@@ -31,6 +31,7 @@ import org.scalatest._
 import scalaz.syntax.tag._
 import scalaz.syntax.traverse._
 
+import scala.collection.compat._
 import scala.concurrent.{ExecutionContext, Future}
 import scala.util.Try
 
@@ -61,18 +62,18 @@ trait AbstractTriggerTest extends SandboxFixture with TestCommands {
     } yield client
 
   override protected def darFile =
-    Try(requiredResource("triggers/tests/acs.dar"))
-      .getOrElse(requiredResource("triggers/tests/acs-1.dev.dar"))
+    Try(BazelRunfiles.requiredResource("triggers/tests/acs.dar"))
+      .getOrElse(BazelRunfiles.requiredResource("triggers/tests/acs-1.dev.dar"))
 
   protected val dar = DarReader().readArchiveFromFile(darFile).get.map { case (pkgId, archive) =>
     Decode.readArchivePayload(pkgId, archive)
   }
   protected val compiledPackages =
-    PureCompiledPackages(dar.all.toMap, speedy.Compiler.Config.Dev).right.get
+    PureCompiledPackages(dar.all.toMap, speedy.Compiler.Config.Dev).toOption.get
 
   protected def getRunner(client: LedgerClient, name: QualifiedName, party: String): Runner = {
     val triggerId = Identifier(packageId, name)
-    val trigger = Trigger.fromIdentifier(compiledPackages, triggerId).right.get
+    val trigger = Trigger.fromIdentifier(compiledPackages, triggerId).toOption.get
     newLoggingContext(label[Trigger], trigger.loggingExtension) { implicit lc =>
       new Runner(
         compiledPackages,
@@ -152,7 +153,9 @@ trait AbstractTriggerTest extends SandboxFixture with TestCommands {
       contracts
         .map(created => (created.getTemplateId, created.getCreateArguments))
         .groupBy(_._1)
+        .view
         .mapValues(cs => cs.map(_._2))
+        .toMap
     )
   }
 
diff --git a/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/Tls.scala b/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/Tls.scala
index f97bb2d5d3f..9405be4cefa 100644
--- a/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/Tls.scala
+++ b/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/Tls.scala
@@ -8,7 +8,6 @@ import com.daml.bazeltools.BazelRunfiles._
 import com.daml.lf.data.Ref._
 import com.daml.ledger.api.testing.utils.{SuiteResourceManagementAroundAll}
 import com.daml.ledger.api.tls.TlsConfiguration
-import com.daml.ledger.api.v1.commands._
 import com.daml.ledger.api.v1.commands.CreateCommand
 import com.daml.ledger.api.v1.{value => LedgerApi}
 import java.io.File
diff --git a/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/UnfoldStateSpec.scala b/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/UnfoldStateSpec.scala
index b74ebbca938..40d383b6ea6 100644
--- a/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/UnfoldStateSpec.scala
+++ b/triggers/tests/src/test/scala/com/digitalasset/daml/lf/engine/trigger/test/UnfoldStateSpec.scala
@@ -38,7 +38,7 @@ class UnfoldStateSpec
 
   "iterator" should {
     "retract fromLinearSeq and end with unit" in forAll { xs: List[Int] =>
-      fromLinearSeq(xs).iterator().to[List] should ===((xs map \/.right) :+ -\/(()))
+      fromLinearSeq(xs).iterator().toList should ===((xs map \/.right) :+ -\/(()))
     }
   }