fix(memory-wallet): expose plugin otherMethods on memory wallets

Memory wallets need access to plugin-defined methods for flows like
max spend estimation that rely on engine-specific capabilities. Exposing
and bridgifying both plain and key-aware method variants keeps behavior
consistent with full wallets while preserving key handling boundaries.

Author: samholmes

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- added: Expose engine otherMethods on EdgeMemoryWallet so memory wallets support custom methods like makeMaxSpend.
+
 ## 2.43.6 (2026-04-02)
 
 - fixed: Upgraded @nymproject/mix-fetch with promised reliability improvements.

src/core/account/memory-wallet.ts

@@ -147,6 +147,23 @@ export const makeMemoryWalletInner = async (
     syncNetworkTask.start({ wait: false })
   }
 
+  const otherMethods: { [name: string]: (...args: any[]) => any } = {}
+  if (engine.otherMethods != null) {
+    for (const name of Object.keys(engine.otherMethods)) {
+      const method = engine.otherMethods[name]
+      if (typeof method !== 'function') continue
+      otherMethods[name] = method
+    }
+  }
+  if (engine.otherMethodsWithKeys != null) {
+    for (const name of Object.keys(engine.otherMethodsWithKeys)) {
+      const method = engine.otherMethodsWithKeys[name]
+      if (typeof method !== 'function') continue
+      otherMethods[name] = (...args: any[]) => method(walletInfo.keys, ...args)
+    }
+  }
+  bridgifyObject(otherMethods)
+
   const out = bridgifyObject<EdgeMemoryWallet>({
     watch: watchMethod,
     get balanceMap() {
@@ -196,6 +213,8 @@ export const makeMemoryWalletInner = async (
     },
     async saveTx() {},
 
+    otherMethods,
+
     async close() {
       log.warn('killing memory wallet')
       syncNetworkTask?.stop()

src/types/types.ts

@@ -1473,6 +1473,7 @@ export interface EdgeMemoryWallet {
   readonly signTx: (tx: EdgeTransaction) => Promise<EdgeTransaction>
   readonly broadcastTx: (tx: EdgeTransaction) => Promise<EdgeTransaction>
   readonly saveTx: (tx: EdgeTransaction) => Promise<void>
+  readonly otherMethods: EdgeOtherMethods
   readonly close: () => Promise<void>
 
   /** @deprecated Use syncStatus */