Merge pull request #34 from xash/currently_send_entry

Make DataChannel handler independent of currentlyReceivedEntry

Author: sgwilym

src/wgps/wgps_messenger.ts

@@ -378,6 +378,7 @@ export class WgpsMessenger<
   private currentlySentEntry: Entry<NamespaceId, SubspaceId, PayloadDigest>;
   private currentlyReceivedEntry: Entry<NamespaceId, SubspaceId, PayloadDigest>;
   private currentlyReceivedOffset = 0n;
+  private currentlyReceivedLimit = 0n;
 
   private handlesPayloadRequestsOurs = new HandleStore<{
     offset: bigint;
@@ -743,7 +744,6 @@ export class WgpsMessenger<
 
       if (msg.kind === MsgKind.DataSendEntry) {
         this.currentlyReceivedEntry = msg.entry;
-        this.currentlyReceivedOffset = msg.offset;
       } else if (msg.kind === MsgKind.DataReplyPayload) {
         const request = this.handlesPayloadRequestsOurs.get(msg.handle);
 
@@ -754,7 +754,6 @@ export class WgpsMessenger<
         }
 
         this.currentlyReceivedEntry = request.entry;
-        this.currentlyReceivedOffset = request.offset;
       }
 
       switch (msg.kind) {
@@ -1489,6 +1488,9 @@ export class WgpsMessenger<
   ) {
     switch (message.kind) {
       case MsgKind.DataSendEntry: {
+        this.currentlyReceivedLimit = message.entry.payloadLength;
+        this.currentlyReceivedOffset = message.offset;
+
         const staticToken = await this.handlesStaticTokensTheirs.getEventually(
           message.staticTokenHandle,
         );
@@ -1513,15 +1515,15 @@ export class WgpsMessenger<
       case MsgKind.DataSendPayload: {
         if (
           message.amount + this.currentlyReceivedOffset >
-            this.currentlyReceivedEntry.payloadLength
+            this.currentlyReceivedLimit
         ) {
           throw new WgpsMessageValidationError("Partner sent too many bytes.");
         }
 
         this.currentlyReceivedOffset += message.amount;
 
         const endHere = this.currentlyReceivedOffset ===
-          this.currentlyReceivedEntry.payloadLength;
+          this.currentlyReceivedLimit;
 
         this.dataPayloadIngester.push(message.bytes, endHere);
 
@@ -1536,6 +1538,8 @@ export class WgpsMessenger<
           );
         }
 
+        this.currentlyReceivedLimit = result.entry.payloadLength;
+        this.currentlyReceivedOffset = result.offset;
         this.dataPayloadIngester.target(result.entry);
 
         break;