From 747b6e78b063ef0347de313d78aa29013d4c6743 Mon Sep 17 00:00:00 2001
From: "Samuel EF. Tinnerholm" <samuel.tinnerholm@gmail.com>
Date: Sun, 24 May 2026 17:51:46 +0300
Subject: [PATCH] fix: make params optional on compareMarketPrices and
 fetchRelatedMarkets

Fixes #448
---
 core/src/BaseExchange.ts  | 6 +++---
 core/src/router/Router.ts | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/core/src/BaseExchange.ts b/core/src/BaseExchange.ts
index 0e27ff64..d3c1174f 100644
--- a/core/src/BaseExchange.ts
+++ b/core/src/BaseExchange.ts
@@ -1518,7 +1518,7 @@ export abstract class PredictionMarketExchange {
      * @param params - Match filter parameters (uses relation: 'identity' internally)
      * @returns Array of price comparisons across venues
      */
-    async compareMarketPrices(params: FetchMatchesParams): Promise<PriceComparison[]> {
+    async compareMarketPrices(params?: FetchMatchesParams): Promise<PriceComparison[]> {
         throw new Error("Method compareMarketPrices not implemented.");
     }
 
@@ -1529,7 +1529,7 @@ export abstract class PredictionMarketExchange {
      * @param params - Match filter parameters
      * @returns Array of subset/superset matches with live prices
      */
-    async fetchRelatedMarkets(params: FetchMatchesParams): Promise<PriceComparison[]> {
+    async fetchRelatedMarkets(params?: FetchMatchesParams): Promise<PriceComparison[]> {
         throw new Error("Method fetchRelatedMarkets not implemented.");
     }
 
@@ -1558,7 +1558,7 @@ export abstract class PredictionMarketExchange {
      * @param params - Match filter parameters
      * @returns Array of subset/superset matches with live prices
      */
-    async fetchHedges(params: FetchMatchesParams): Promise<PriceComparison[]> {
+    async fetchHedges(params?: FetchMatchesParams): Promise<PriceComparison[]> {
         throw new Error("Method fetchHedges not implemented.");
     }
 
diff --git a/core/src/router/Router.ts b/core/src/router/Router.ts
index 2877212b..5c3c0af1 100644
--- a/core/src/router/Router.ts
+++ b/core/src/router/Router.ts
@@ -256,7 +256,7 @@ export class Router extends PredictionMarketExchange {
     // Price comparison: identity matches with live prices
     // -----------------------------------------------------------------------
 
-    async compareMarketPrices(params: FetchMarketMatchesParams): Promise<PriceComparison[]> {
+    async compareMarketPrices(params: FetchMarketMatchesParams = {}): Promise<PriceComparison[]> {
         if (params.market && !params.marketId) {
             params = { ...params, marketId: params.market.marketId };
         }
@@ -281,7 +281,7 @@ export class Router extends PredictionMarketExchange {
     // Related markets: subset/superset matches with live prices
     // -----------------------------------------------------------------------
 
-    async fetchRelatedMarkets(params: FetchMarketMatchesParams): Promise<PriceComparison[]> {
+    async fetchRelatedMarkets(params: FetchMarketMatchesParams = {}): Promise<PriceComparison[]> {
         if (params.market && !params.marketId) {
             params = { ...params, marketId: params.market.marketId };
         }
@@ -304,7 +304,7 @@ export class Router extends PredictionMarketExchange {
     }
 
     /** @deprecated Use {@link fetchRelatedMarkets} instead. */
-    async fetchHedges(params: FetchMarketMatchesParams): Promise<PriceComparison[]> {
+    async fetchHedges(params: FetchMarketMatchesParams = {}): Promise<PriceComparison[]> {
         logger.warn('fetchHedges is deprecated, use fetchRelatedMarkets instead');
         return this.fetchRelatedMarkets(params);
     }