LF: Freeze archive proto for LF 1.14 (#9912)

CHANGELOG_BEGIN
CHANGELOG_END

daml-lf/archive/BUILD.bazel

@@ -128,6 +128,7 @@ da_scala_test_suite(
         ":daml_lf_1.11_archive_proto_srcs",
         ":daml_lf_1.12_archive_proto_srcs",
         ":daml_lf_1.13_archive_proto_srcs",
+        ":daml_lf_1.14_archive_proto_srcs",
         ":daml_lf_1.6_archive_proto_srcs",
         ":daml_lf_1.7_archive_proto_srcs",
         ":daml_lf_1.8_archive_proto_srcs",
@@ -146,6 +147,7 @@ da_scala_test_suite(
     deps = [
         ":daml_lf_1.12_archive_proto_java",
         ":daml_lf_1.13_archive_proto_java",
+        ":daml_lf_1.14_archive_proto_java",
         ":daml_lf_1.6_archive_proto_java",
         ":daml_lf_1.7_archive_proto_java",
         ":daml_lf_1.8_archive_proto_java",

daml-lf/archive/src/main/protobuf/com/daml/daml_lf_1_14/daml_lf.proto

@@ -0,0 +1,54 @@
+// Copyright (c) 2021 Digital Asset (Switzerland) GmbH and/or its affiliates. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+syntax = "proto3";
+package daml_lf_1_13;
+
+option java_package = "com.daml.daml_lf_1_14";
+option csharp_namespace = "Com.Daml.Daml_Lf_1_14.DamlLf";
+
+import "com/daml/daml_lf_1_14/daml_lf_1.proto";
+
+message ArchivePayload {
+  // this is number 3 for historical reasons -- we had
+  // Daml-LF v0 and v1 before we had minor versions.
+  string minor = 3;
+  reserved 9999; // for the removed "dev" major version
+
+  reserved 1; // was daml_lf_0
+
+  oneof Sum {
+    daml_lf_1.Package daml_lf_1 = 2;
+
+    // lf_2 = 4, lf_3 = 5, etc
+  }
+}
+
+enum HashFunction {
+  SHA256 = 0;
+}
+
+message Archive {
+  HashFunction hash_function = 1;
+
+  // deprecated field (bytes hash = 2), replaced by
+  // field 4.
+
+  // Must be an encoded ArchivePayload. We store it as `bytes` to
+  // simplify hashing and in future signing.
+  bytes payload = 3;
+  // The hash is simply the ascii7 lowercase hex-encoded hash of the bytes
+  // according to the hash_function. We store it here for convenience, code
+  // reading the Archive should verify that the hash is valid.
+  //
+  // Note that the hash is computed directly on the blob and not
+  // on the decoded structure. This means that servers implementing
+  // a Daml ledger need to store the blob as-is somewhere to be able
+  // to always offer proof that they have a Daml package matching
+  // the requested hash. We decided to go for this route rather than
+  // relying on a canonical encoding of the AST since such a scheme
+  // would be extremely hard (for example protobuf encoding is not
+  // canonical) to maintain and does not buy us much.
+  string hash = 4;
+
+}