Reputation economy: rep-scaled buy/refuel discounts + job reward quality (ISS-072, v0.38.0)

lib/game/actions.ts

@@ -8,7 +8,16 @@ import { weatherFor } from '@/lib/weather';
 import { requiredFuelFor, windBurnFactor } from '@/lib/sim/movement';
 import { runAction } from '@/lib/sim/engine';
 import { getStateSnapshot, parseIcaoQueue } from './state';
-import { FUEL_PRICE_PER_L, PLANE_TYPES, SELL_FRACTION } from './catalog';
+import {
+  FUEL_DISCOUNT_PER_REP,
+  FUEL_PRICE_PER_L,
+  MAX_FUEL_DISCOUNT,
+  MAX_PLANE_DISCOUNT,
+  PLANE_DISCOUNT_PER_REP,
+  PLANE_TYPES,
+  repRate,
+  SELL_FRACTION,
+} from './catalog';
 import { abandonPenalty } from './penalty';
 import { HUB_ICAO } from './seed';
 
@@ -244,16 +253,19 @@ export async function ignorePackage(inst: GameDb, packageId: string): Promise<vo
 
 // --- Market (POST /api/market/buy-plane {model}) ---
 
-// Buy a catalog model at full price; it arrives 'available' with a full tank at
-// the home base (EDDF).
+// Buy a catalog model at its reputation-scaled price (v0.38.0, ISS-072 — discount grows with
+// reputation, exactly full price at the starting value); it arrives 'available' with a full tank
+// at the home base (EDDF).
 export async function buyPlane(inst: GameDb, model: string): Promise<{ planeId: string }> {
   const type = PLANE_TYPES[model];
   if (!type) throw new GameActionError(400, `unknown plane model "${model}"`);
 
   const account = (await inst.db.select().from(schema.account))[0];
   if (!account) throw new Error('account row missing');
-  if (account.cash < type.price) {
-    throw new GameActionError(409, `insufficient funds: a ${type.name} costs ${type.price}, you have ${Math.round(account.cash)}`);
+  // v0.38.0 (ISS-072): the EFFECTIVE cost drives both the funds check and the deduction.
+  const cost = Math.round(type.price * (1 - repRate(account.reputation, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT)) * 100) / 100;
+  if (account.cash < cost) {
+    throw new GameActionError(409, `insufficient funds: a ${type.name} costs ${cost}, you have ${Math.round(account.cash)}`);
   }
 
   const fc = await loadAirportsGeoJson();
@@ -273,7 +285,7 @@ export async function buyPlane(inst: GameDb, model: string): Promise<{ planeId:
     lon: home.lon,
     departureSimTime: null,
   });
-  await inst.db.update(schema.account).set({ cash: account.cash - type.price });
+  await inst.db.update(schema.account).set({ cash: Math.round((account.cash - cost) * 100) / 100 });
   await persist(inst);
   return { planeId };
 }
@@ -376,9 +388,10 @@ export async function refuelPlane(inst: GameDb, planeId: string, opts: RefuelOpt
   }
 
   const liters = Math.max(0, targetFuel - plane.fuel);
-  const cost = Math.round(liters * FUEL_PRICE_PER_L * 100) / 100;
   const account = (await inst.db.select().from(schema.account))[0];
   if (!account) throw new Error('account row missing');
+  // v0.38.0 (ISS-072): rep-scaled discount on the PRICE term only — the burn/target math above is untouched.
+  const cost = Math.round(liters * FUEL_PRICE_PER_L * (1 - repRate(account.reputation, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT)) * 100) / 100;
   if (cost > 0 && account.cash < cost) {
     throw new GameActionError(409, `insufficient funds: refueling costs ${cost}, you have ${Math.round(account.cash)}`);
   }