fix: export method for validate credentials

src/client/user-api.ts

@@ -19,6 +19,7 @@ import { DEFAULT_OPTIONS } from './client-options';
 import { assertCredentials, assertNotEmptyString } from '../utils/assert';
 import { TGLink } from './link';
 import { localStorageAdapter } from '../utils/local-storage';
+import { isValidCredentials } from '../utils/is-valid-credentials';
 
 const storageStruct = object({
     getItem   : fn(),
@@ -213,7 +214,7 @@ export class TGUserApi
 
             if (maybeSession !== null)
             {
-                if (this.#isValidCredentials(maybeSession))
+                if (isValidCredentials(maybeSession))
                 {
                     await this.useCredentials(maybeSession);
                 }
@@ -309,18 +310,4 @@ export class TGUserApi
             );
         }
     }
-
-    #isValidCredentials(
-        maybeSession: unknown,
-    ): maybeSession is TGUserCredentials
-    {
-        return (
-            isObject(maybeSession) &&
-            'priv' in maybeSession &&
-            'epriv' in maybeSession &&
-            'alias' in maybeSession &&
-            'pub' in maybeSession &&
-            'epub' in maybeSession
-        );
-    }
 }

src/utils/assert.ts

@@ -100,19 +100,20 @@ export function assertNotEmptyString(value: unknown, msg?: string): string
     return unwrap(actual);
 }
 
+const userCredentialsErrMes        = arg => `Credentials must contain '${arg}' string property.`;
+export const userCredentialsStruct = object(
+    {
+        alias: string(userCredentialsErrMes('alias')),
+        pub  : string(userCredentialsErrMes('pub')),
+        priv : string(userCredentialsErrMes('priv')),
+        epriv: string(userCredentialsErrMes('epriv')),
+        epub : string(userCredentialsErrMes('priv')),
+    },
+    'Credentials invalid',
+);
+
 export function assertCredentials(value: unknown): TGUserCredentials
 {
-    const errMes = arg => `Credentials must contain '${arg}' string property.`;
-    const struct = object(
-        {
-            alias: string(errMes('alias')),
-            pub  : string(errMes('pub')),
-            priv : string(errMes('priv')),
-            epriv: string(errMes('epriv')),
-            epub : string(errMes('priv')),
-        },
-        'Credentials invalid',
-    );
-    const actual = struct(value);
+    const actual = userCredentialsStruct(value);
     return unwrap(actual);
 }

src/utils/index.ts

@@ -10,3 +10,4 @@ export * from './storage-helpers';
 export * from './stringify-options-get';
 export * from './uuidv4';
 export * from './window-or-global';
+export * from './is-valid-credentials';

src/utils/is-valid-credentials.ts

@@ -0,0 +1,7 @@
+import { TGUserCredentials } from '../types';
+import { userCredentialsStruct } from './assert';
+
+export function isValidCredentials(maybeSession: unknown): maybeSession is TGUserCredentials
+{
+    return userCredentialsStruct(maybeSession).ok;
+}