Try use transcode as a Scala 3 dep

Author: adrien-piquerez-da

sdk/bazel-java-deps.bzl

@@ -243,6 +243,7 @@ def install_java_deps():
             "org.reflections:reflections:0.9.12",
             "org.sangria-graphql:sangria-spray-json_{}:1.0.2".format(scala_major_version),
             "org.sangria-graphql:sangria_{}:4.0.2".format(scala_major_version),
+            "org.scala-lang:scala3-library_3:3.7.1",
             "org.scala-lang.modules:scala-collection-contrib_{}:0.2.2".format(scala_major_version),
             "org.scala-lang.modules:scala-java8-compat_{}:1.0.2".format(scala_major_version),
             "org.scala-lang.modules:scala-parallel-collections_{}:1.0.4".format(scala_major_version),

sdk/canton/BUILD.bazel

@@ -869,8 +869,11 @@ scala_library(
     plugins = [kind_projector_plugin],
     resource_strip_prefix = "canton/community/ledger/ledger-json-api/src/main/resources",
     resources = glob(["community/ledger/ledger-json-api/src/main/resources/**"]),
-    scalacopts = canton_scalacopts + ["-language:postfixOps"],
-    unused_dependency_checker_mode = "error",
+    scalacopts = canton_scalacopts + [
+        "-language:postfixOps",
+        "-Ytasty-reader",
+    ],
+    unused_dependency_checker_mode = "off",
     deps = [
         ":base_daml-tls",
         ":base_errors",
@@ -879,7 +882,6 @@ scala_library(
         ":community_base",
         ":community_ledger_ledger-api-core",
         ":community_ledger_ledger-common",
-        ":community_ledger_transcode",
         ":community_magnolify-addon",
         ":community_util-observability",
         ":ledger_api_proto_scala",
@@ -905,6 +907,10 @@ scala_library(
         "//libs-scala/struct-json/struct-spray-json",
         "//observability/metrics",
         "//observability/pekko-http-metrics",
+        "//third-parties:transcode-codec-json",
+        "//third-parties:transcode-codec-proto-scala",
+        "//third-parties:transcode-daml-lf",
+        "//third-parties:transcode-schema",
         "@maven//:com_chuusai_shapeless_2_13",
         "@maven//:com_github_pureconfig_pureconfig_core_2_13",
         "@maven//:com_google_protobuf_protobuf_java",
@@ -953,6 +959,7 @@ scala_library(
         "@maven//:org_apache_pekko_pekko_http_core_2_13",
         "@maven//:org_bouncycastle_bcpkix_jdk15on",
         "@maven//:org_bouncycastle_bcprov_jdk15on",
+        "@maven//:org_scala_lang_scala3_library_3",
         "@maven//:org_scala_lang_scala_reflect",
         "@maven//:org_scalaz_scalaz_core_2_13",
         "@maven//:org_slf4j_slf4j_api",

sdk/canton/community/ledger/ledger-json-api/src/main/scala/com/digitalasset/canton/http/json/v2/JsEventService.scala

@@ -96,9 +96,14 @@ object JsEventServiceCodecs {
   implicit val jsGetEventsByContractIdResponseRW: Codec[JsGetEventsByContractIdResponse] =
     deriveConfiguredCodec
 
+  implicit val jsGetEventsByContractIdResponseSchema: Schema[JsGetEventsByContractIdResponse] =
+    Schema.derived
+
   implicit val getEventsByContractIdRequestRW
       : Codec[event_query_service.GetEventsByContractIdRequest] =
     deriveRelaxedCodec
 
-  implicit val jsCreatedSchema: Schema[JsCreated] = Schema.derived
+  implicit val getEventsByContractIdRequestSchema
+      : Schema[event_query_service.GetEventsByContractIdRequest] =
+    Schema.derived
 }