feat: grantTokenByRefreshToken (#45)

packages/client/src/grant-token.test.ts

@@ -1,6 +1,6 @@
 import nock from 'nock';
 
-import { grantTokenByAuthorizationCode } from './grant-token';
+import { grantTokenByAuthorizationCode, grantTokenByRefreshToken } from './grant-token';
 
 describe('grantTokenByAuthorizationCode', () => {
   test('get tokenSet paramaters', async () => {
@@ -46,3 +46,26 @@ describe('grantTokenByAuthorizationCode', () => {
     ).rejects.toThrowError();
   });
 });
+
+describe('grantTokenByRefreshToken', () => {
+  test('get tokenSet paramaters', async () => {
+    const successResponse = {
+      access_token: 'access_token',
+      expires_in: 3600,
+      id_token: 'id_token',
+      refresh_token: 'refresh_token',
+    };
+
+    nock('https://logto.dev', { allowUnmocked: true })
+      .post('/oidc/token')
+      .reply(200, successResponse);
+
+    const tokenSet = await grantTokenByRefreshToken(
+      'https://logto.dev/oidc/token',
+      'client_id',
+      'refresh_token'
+    );
+
+    expect(tokenSet).toMatchObject(successResponse);
+  });
+});

packages/client/src/grant-token.ts

@@ -38,3 +38,27 @@ export const grantTokenByAuthorizationCode = async (
 
   return result.data;
 };
+
+export const grantTokenByRefreshToken = async (
+  endpoint: string,
+  clientId: string,
+  refreshToken: string
+): Promise<TokenSetParameters> => {
+  const parameters = new URLSearchParams();
+  parameters.append('grant_type', 'refresh_token');
+  parameters.append('client_id', clientId);
+  parameters.append('refresh_token', refreshToken);
+
+  const response = await opRequest.post(endpoint, parameters, {
+    headers: {
+      'Content-Type': 'application/x-www-form-urlencoded',
+    },
+  });
+  const result = TokenSetParametersSchema.safeParse(response.data);
+
+  if (!result.success) {
+    throw new OPError({ originalError: result.error });
+  }
+
+  return result.data;
+};