fix: renamed ExpirationType enum value LEGACY to UNKNOWN

protos/SignalService.proto

@@ -47,7 +47,7 @@ message MessageRequestResponse {
 message Content {
 
   enum ExpirationType {
-    LEGACY              = 0;
+    UNKNOWN             = 0;
     DELETE_AFTER_READ   = 1;
     DELETE_AFTER_SEND   = 2;
   }

ts/receiver/contentMessage.ts

@@ -418,7 +418,7 @@ export async function innerHandleSwarmContentMessage(
 
       const isLegacy = Boolean(
         (!content.expirationType && !content.expirationTimer) ||
-          content.expirationType === SignalService.Content.ExpirationType.LEGACY
+          content.expirationType === SignalService.Content.ExpirationType.UNKNOWN
       );
       const isLegacyMessage = Boolean(
         isLegacy && dataMessage.expireTimer && dataMessage.expireTimer > -1

ts/session/messages/outgoing/ExpirableMessage.ts

@@ -31,7 +31,7 @@ export class ExpirableMessage extends ContentMessage {
           : this.expirationType === 'deleteAfterRead'
           ? SignalService.Content.ExpirationType.DELETE_AFTER_READ
           : this.expirationType === 'legacy'
-          ? SignalService.Content.ExpirationType.LEGACY
+          ? SignalService.Content.ExpirationType.UNKNOWN
           : undefined,
       expirationTimer: this.expireTimer && this.expireTimer > -1 ? this.expireTimer : undefined,
     });

ts/session/messages/outgoing/controlMessage/group/ClosedGroupMessage.ts

@@ -37,7 +37,7 @@ export abstract class ClosedGroupMessage extends ExpirableMessage {
         this.expirationType === 'deleteAfterSend'
           ? SignalService.Content.ExpirationType.DELETE_AFTER_SEND
           : !this.expirationType || this.expirationType === 'legacy'
-          ? SignalService.Content.ExpirationType.LEGACY
+          ? SignalService.Content.ExpirationType.UNKNOWN
           : undefined,
     });
   }