XO wallet integration

packages/primitives/src/utils.ts

@@ -2,10 +2,11 @@ import { Transaction } from './transaction.js';
 
 import { binToHex } from '@bitauth/libauth';
 
+// TODO: The below should probably be moved and renamed.
 /**
  * Sort transactions by the order in which they should be broadcast.
  */
-export function sortTransactions(
+export function sortTransactionsByDependencies(
   transactions: Array<Transaction>,
 ): Array<Transaction> {
   const transactionMap = transactions.reduce(
@@ -139,6 +140,24 @@ export class ExtMap<T> extends Map<PropertyKey, T> {
     return sorted;
   }
 
+  /**
+   * Returns a new ExtMap containing a subset of entries from the original Map
+   * @param start - The starting index (inclusive)
+   * @param end - The ending index (exclusive)
+   * @returns A new ExtMap with the sliced entries
+   */
+  slice(start: number, end?: number): ExtMap<T> {
+    const keys = Array.from(this.keys());
+    const slicedKeys = keys.slice(start, end);
+
+    const result = new ExtMap<T>();
+    for (const key of slicedKeys) {
+      result.set(key, this.get(key) as T);
+    }
+
+    return result;
+  }
+
   /**
    * Converts the collection to a plain object
    */