economy and rematch

app.ts

@@ -8,6 +8,7 @@ import {
     insertMatchForNewRoom,
     insertRematchMatch,
     loadUsernamesForUserPair,
+    computeRcPrizeFromEntryFee,
     MATCH_ENTRY_FEE_RC,
     registerMatchRoutes,
     updateMatchUserBlue,
@@ -98,17 +99,20 @@ function roomResponseForViewer(room: Room, viewerUserId: number): Room {
     const idx = room.Players.findIndex((p) => p.UserId === viewerUserId);
     const your_team: 'red' | 'blue' | null = idx === 0 ? 'red' : idx === 1 ? 'blue' : null;
     const entry_fee = room.entry_fee ?? MATCH_ENTRY_FEE_RC;
-    return { ...room, entry_fee, your_team };
+    const rc_prize = computeRcPrizeFromEntryFee(entry_fee);
+    return { ...room, entry_fee, rc_prize, your_team };
 }
 
 /** Same envelope as `POST /internal/rematch` success: both sides when seated, else `null` for open slot. */
 function roomMatchSuccessEnvelope(room: Room): MatchRoomSuccessEnvelope {
     const entry_fee = room.entry_fee ?? MATCH_ENTRY_FEE_RC;
+    const rc_prize = computeRcPrizeFromEntryFee(entry_fee);
     const redId = room.Players[0]?.UserId;
     const blueId = room.Players[1]?.UserId;
     return {
         ok: true,
         entry_fee,
+        rc_prize,
         for_red: redId != null ? roomResponseForViewer(room, redId) : null,
         for_blue: blueId != null ? roomResponseForViewer(room, blueId) : null,
     };