feat(awm): backup awm client configurations

Ticket: WCN-362

Author: margueriteblair

src/__tests__/api/master/awmBackupClient.test.ts

@@ -0,0 +1,133 @@
+import 'should';
+import { AppMode, MasterExpressConfig, TlsMode } from '../../../shared/types';
+import {
+  createAwmClient,
+  createAwmBackupClient,
+} from '../../../masterBitgoExpress/clients/advancedWalletManagerClient';
+
+describe('AWM Backup Client', () => {
+  const baseConfig: MasterExpressConfig = {
+    appMode: AppMode.MASTER_EXPRESS,
+    port: 3081,
+    bind: 'localhost',
+    timeout: 60000,
+    httpLoggerFile: '',
+    env: 'test',
+    disableEnvCheck: true,
+    authVersion: 2,
+    advancedWalletManagerUrl: 'http://primary-awm.invalid',
+    awmServerCaCert: 'dummy-cert',
+    tlsMode: TlsMode.DISABLED,
+    clientCertAllowSelfSigned: true,
+  };
+
+  describe('createAwmBackupClient', () => {
+    it('should return undefined when no backup URL is configured', () => {
+      const result = createAwmBackupClient(baseConfig, 'tbtc');
+      (result === undefined).should.be.true();
+    });
+
+    it('should create a client when backup URL is configured', () => {
+      const config: MasterExpressConfig = {
+        ...baseConfig,
+        advancedWalletManagerBackupUrl: 'http://backup-awm.invalid',
+      };
+      const result = createAwmBackupClient(config, 'tbtc');
+      (result !== undefined).should.be.true();
+    });
+
+    it('should create a client pointing to the backup URL, not the primary', () => {
+      const config: MasterExpressConfig = {
+        ...baseConfig,
+        advancedWalletManagerBackupUrl: 'http://backup-awm.invalid',
+      };
+      const backupClient = createAwmBackupClient(config, 'tbtc');
+      const primaryClient = createAwmClient(config, 'tbtc');
+
+      // Both clients should exist
+      (backupClient !== undefined).should.be.true();
+      (primaryClient !== undefined).should.be.true();
+
+      // They should be different instances
+      (backupClient !== primaryClient).should.be.true();
+    });
+
+    it('should fall back to primary certs when backup-specific certs are not set', () => {
+      const config: MasterExpressConfig = {
+        ...baseConfig,
+        tlsMode: TlsMode.MTLS,
+        advancedWalletManagerBackupUrl: 'https://backup-awm.invalid',
+        awmServerCaCert: 'primary-ca-cert',
+        awmClientTlsKey: 'primary-client-key',
+        awmClientTlsCert: 'primary-client-cert',
+        // No backup-specific certs set — should fall back to primary
+      };
+      const result = createAwmBackupClient(config, 'tbtc');
+      // Should succeed using the primary certs as fallback
+      (result !== undefined).should.be.true();
+    });
+
+    it('should use backup-specific certs when provided', () => {
+      const config: MasterExpressConfig = {
+        ...baseConfig,
+        tlsMode: TlsMode.MTLS,
+        advancedWalletManagerBackupUrl: 'https://backup-awm.invalid',
+        awmServerCaCert: 'primary-ca-cert',
+        awmClientTlsKey: 'primary-client-key',
+        awmClientTlsCert: 'primary-client-cert',
+        awmBackupServerCaCert: 'backup-ca-cert',
+        awmBackupClientTlsKey: 'backup-client-key',
+        awmBackupClientTlsCert: 'backup-client-cert',
+      };
+      const result = createAwmBackupClient(config, 'tbtc');
+      (result !== undefined).should.be.true();
+    });
+
+    it('should throw when backup URL is set but mTLS certs are missing', () => {
+      const config: MasterExpressConfig = {
+        ...baseConfig,
+        tlsMode: TlsMode.MTLS,
+        advancedWalletManagerBackupUrl: 'https://backup-awm.invalid',
+        // No certs at all — constructor should throw
+        awmServerCaCert: undefined as any,
+        awmClientTlsKey: undefined,
+        awmClientTlsCert: undefined,
+      };
+      (() => createAwmBackupClient(config, 'tbtc')).should.throw(
+        /Failed to create backup advanced wallet manager client/,
+      );
+    });
+  });
+
+  describe('fallback behavior in middleware', () => {
+    it('should use primary client for both user and backup when no backup URL is set', () => {
+      const primaryClient = createAwmClient(baseConfig, 'tbtc');
+      const backupClient = createAwmBackupClient(baseConfig, 'tbtc');
+
+      (primaryClient !== undefined).should.be.true();
+      // No backup URL → backup client is undefined → middleware falls back to primary
+      (backupClient === undefined).should.be.true();
+
+      // Middleware would do: awmBackupClient = backupClient ?? primaryClient
+      const effectiveBackupClient = backupClient ?? primaryClient;
+      (effectiveBackupClient === primaryClient).should.be.true();
+    });
+
+    it('should use separate client for backup when backup URL is set', () => {
+      const config: MasterExpressConfig = {
+        ...baseConfig,
+        advancedWalletManagerBackupUrl: 'http://backup-awm.invalid',
+      };
+      const primaryClient = createAwmClient(config, 'tbtc');
+      const backupClient = createAwmBackupClient(config, 'tbtc');
+
+      (primaryClient !== undefined).should.be.true();
+      (backupClient !== undefined).should.be.true();
+
+      // Middleware would do: awmBackupClient = backupClient ?? primaryClient
+      const effectiveBackupClient = backupClient ?? primaryClient;
+      (effectiveBackupClient === backupClient).should.be.true();
+      (effectiveBackupClient !== primaryClient).should.be.true();
+    });
+  });
+});