added quest gold modifier upgrade

src/classes/Guild.ts

@@ -2,6 +2,7 @@ import type {GuildUpgrade} from "@/classes/GuildUpgrade";
 import AdventurerCapacityUpgrade from "@/classes/guildUpgrades/AdventurerCapacityUpgrade";
 import {formatGold} from "@/classes/NumberMagic";
 import QuestExpUpgrade from "@/classes/guildUpgrades/QuestExpUpgrade";
+import QuestGoldUpgrade from "@/classes/guildUpgrades/QuestGoldUpgrade";
 
 const MAX_LEVEL: number = 8;
 
@@ -12,6 +13,7 @@ export class Guild {
     upgradeCost: number|null = null;
     adventurerCapacity: AdventurerCapacityUpgrade;
     expModifier: QuestExpUpgrade;
+    goldModifier: QuestGoldUpgrade;
 
     constructor(level: number, gold: number, upgrades: {[index:string]: GuildUpgrade} = {}) {
         this.gold = gold;
@@ -22,6 +24,7 @@ export class Guild {
 
         this.adventurerCapacity = upgrades.adventurerCapacity as AdventurerCapacityUpgrade ?? new AdventurerCapacityUpgrade();
         this.expModifier = upgrades.expModifier as QuestExpUpgrade ?? new QuestExpUpgrade();
+        this.goldModifier = upgrades.goldModifier as QuestGoldUpgrade ?? new QuestGoldUpgrade();
 
     }
 

src/classes/guildUpgrades/QuestGoldUpgrade.ts

@@ -0,0 +1,24 @@
+import {GuildUpgrade} from "@/classes/GuildUpgrade";
+
+export default class QuestGoldUpgrade extends GuildUpgrade {
+  constructor(level: number = 1) {
+    super();
+    this.level = level;
+    this.nextLevelCost = this.getCostForLevel(this.level);
+    this.guildLevelRequirement = 8;
+  }
+
+  upgrade(): void {
+    this.level += 1;
+    this.nextLevelCost = this.getCostForLevel(this.level);
+  }
+
+  getCostForLevel(level: number): number {
+    const scalingFactor = Math.pow(1.05, level - 1);
+    return Math.floor(2500000 * scalingFactor * Math.pow(level, 1.01));
+  }
+
+  getModifier(): number {
+    return 1 + (this.level * 0.1);
+  }
+}