feat: backend version based feature toggles

.gitignore

@@ -19,3 +19,5 @@
 .env.production.local
 
 npm-debug.log*
+
+.idea/

src/components/App.test.tsx

@@ -7,12 +7,14 @@ import App from './App'
 
 jest.mock('../libs/JmWalletApi', () => ({
   ...jest.requireActual('../libs/JmWalletApi'),
+  getGetinfo: jest.fn(),
   getSession: jest.fn(),
 }))
 
 describe('<App />', () => {
   beforeEach(() => {
     const neverResolvingPromise = new Promise(() => {})
+    ;(apiMock.getGetinfo as jest.Mock).mockResolvedValue(neverResolvingPromise)
     ;(apiMock.getSession as jest.Mock).mockResolvedValue(neverResolvingPromise)
   })
 

src/components/CreateWallet.test.jsx

@@ -11,6 +11,7 @@ import CreateWallet from './CreateWallet'
 
 jest.mock('../libs/JmWalletApi', () => ({
   ...jest.requireActual('../libs/JmWalletApi'),
+  getGetinfo: jest.fn(),
   getSession: jest.fn(),
   postWalletCreate: jest.fn(),
 }))
@@ -32,7 +33,8 @@ describe('<CreateWallet />', () => {
 
   beforeEach(() => {
     const neverResolvingPromise = new Promise(() => {})
-    apiMock.getSession.mockReturnValue(neverResolvingPromise)
+    apiMock.getGetinfo.mockResolvedValue(neverResolvingPromise)
+    apiMock.getSession.mockResolvedValue(neverResolvingPromise)
   })
 
   it('should render without errors', () => {

src/components/Settings.jsx

@@ -17,6 +17,7 @@ import styles from './Settings.module.css'
 import SeedModal from './settings/SeedModal'
 import FeeConfigModal from './settings/FeeConfigModal'
 import { isDebugFeatureEnabled } from '../constants/debugFeatures'
+import { isFeatureEnabled } from '../constants/features'
 
 export default function Settings({ wallet, stopWallet }) {
   const { t, i18n } = useTranslation()
@@ -226,7 +227,7 @@ export default function Settings({ wallet, stopWallet }) {
             )}
           </rb.Button>
 
-          {isDebugFeatureEnabled('rescanChainPage') && (
+          {serviceInfo && isFeatureEnabled('rescanChain', serviceInfo) && isDebugFeatureEnabled('rescanChainPage') && (
             <Link
               to={routes.rescanChain}
               className={`btn btn-outline-dark ${styles['settings-btn']} position-relative`}

src/components/Wallet.test.tsx

@@ -9,6 +9,7 @@ import Wallet, { WalletProps } from './Wallet'
 
 jest.mock('../libs/JmWalletApi', () => ({
   ...jest.requireActual('../libs/JmWalletApi'),
+  getGetinfo: jest.fn(),
   getSession: jest.fn(),
 }))
 
@@ -43,7 +44,8 @@ describe('<Wallet />', () => {
 
   beforeEach(() => {
     const neverResolvingPromise = new Promise<Response>(() => {})
-    jest.mocked(apiMock.getSession).mockReturnValue(neverResolvingPromise)
+    ;(apiMock.getGetinfo as jest.Mock).mockResolvedValue(neverResolvingPromise)
+    ;(apiMock.getSession as jest.Mock).mockResolvedValue(neverResolvingPromise)
   })
 
   it('should render inactive wallet without errors', () => {

src/components/Wallets.jsx

@@ -12,6 +12,7 @@ import { walletDisplayName } from '../utils'
 import * as Api from '../libs/JmWalletApi'
 import { routes } from '../constants/routes'
 import { ConfirmModal } from './Modal'
+import { isFeatureEnabled } from '../constants/features'
 
 function arrayEquals(a, b) {
   return Array.isArray(a) && Array.isArray(b) && a.length === b.length && a.every((val, index) => val === b[index])
@@ -232,6 +233,7 @@ export default function Wallets({ currentWallet, startWallet, stopWallet }) {
             )
           })
         )}
+
         <div
           className={classNames('d-flex', 'justify-content-center', 'gap-2', 'mt-4', {
             'flex-column': walletList?.length === 0,
@@ -243,7 +245,7 @@ export default function Wallets({ currentWallet, startWallet, stopWallet }) {
               'btn-lg': walletList?.length === 0,
               'btn-dark': walletList?.length === 0,
               'btn-outline-dark': !walletList || walletList.length > 0,
-              disabled: isUnlocking,
+              disabled: isLoading || isUnlocking,
             })}
             data-testid="new-wallet-btn"
           >
@@ -252,19 +254,21 @@ export default function Wallets({ currentWallet, startWallet, stopWallet }) {
               <span>{t('wallets.button_new_wallet')}</span>
             </div>
           </Link>
-          <Link
-            to={routes.importWallet}
-            className={classNames('btn', 'btn-outline-dark', {
-              'btn-lg': walletList?.length === 0,
-              disabled: isUnlocking,
-            })}
-            data-testid="import-wallet-btn"
-          >
-            <div className="d-flex justify-content-center align-items-center">
-              <Sprite symbol="arrow-right" width="20" height="20" className="me-2" />
-              <span>{t('wallets.button_import_wallet')}</span>
-            </div>
-          </Link>
+          {serviceInfo && isFeatureEnabled('importWallet', serviceInfo) && (
+            <Link
+              to={routes.importWallet}
+              className={classNames('btn', 'btn-outline-dark', {
+                'btn-lg': walletList?.length === 0,
+                disabled: isLoading || isUnlocking,
+              })}
+              data-testid="import-wallet-btn"
+            >
+              <div className="d-flex justify-content-center align-items-center">
+                <Sprite symbol="arrow-right" width="20" height="20" className="me-2" />
+                <span>{t('wallets.button_import_wallet')}</span>
+              </div>
+            </Link>
+          )}
         </div>
       </div>
 

src/components/Wallets.test.jsx

@@ -9,6 +9,7 @@ import Wallets from './Wallets'
 
 jest.mock('../libs/JmWalletApi', () => ({
   ...jest.requireActual('../libs/JmWalletApi'),
+  getGetinfo: jest.fn(),
   getSession: jest.fn(),
   getWalletAll: jest.fn(),
   postWalletUnlock: jest.fn(),
@@ -38,6 +39,7 @@ describe('<Wallets />', () => {
   beforeEach(() => {
     const neverResolvingPromise = new Promise(() => {})
     apiMock.getSession.mockResolvedValue(neverResolvingPromise)
+    apiMock.getGetinfo.mockResolvedValue(neverResolvingPromise)
   })
 
   it('should render without errors', () => {
@@ -86,6 +88,10 @@ describe('<Wallets />', () => {
       ok: true,
       json: () => Promise.resolve({ wallets: [] }),
     })
+    apiMock.getGetinfo.mockResolvedValueOnce({
+      ok: true,
+      json: () => Promise.resolve({ version: '0.9.10dev' }),
+    })
 
     act(() => setup({}))
 
@@ -102,7 +108,7 @@ describe('<Wallets />', () => {
     const newWalletButtonBeforeAfter = screen.getByTestId('new-wallet-btn')
     expect(newWalletButtonBeforeAfter.classList.contains('btn-lg')).toBe(true)
 
-    const importWalletButton = screen.getByTestId('import-wallet-btn')
+    const importWalletButton = await screen.findByTestId('import-wallet-btn')
     expect(importWalletButton.classList.contains('btn-lg')).toBe(true)
   })
 
@@ -121,6 +127,10 @@ describe('<Wallets />', () => {
       ok: true,
       json: () => Promise.resolve({ wallets: ['wallet0.jmdat', 'wallet1.jmdat'] }),
     })
+    apiMock.getGetinfo.mockResolvedValueOnce({
+      ok: true,
+      json: () => Promise.resolve({ version: '0.9.10dev' }),
+    })
 
     act(() => setup({}))
 
@@ -136,11 +146,40 @@ describe('<Wallets />', () => {
     expect(newWalletButton.classList.contains('btn')).toBe(true)
     expect(newWalletButton.classList.contains('btn-lg')).toBe(false)
 
-    const importWalletButton = screen.getByTestId('import-wallet-btn')
+    const importWalletButton = await screen.findByTestId('import-wallet-btn')
     expect(importWalletButton.classList.contains('btn')).toBe(true)
     expect(importWalletButton.classList.contains('btn-lg')).toBe(false)
   })
 
+  it('should hide "Import Wallet"-button on unsupported backend version', async () => {
+    apiMock.getSession.mockResolvedValueOnce({
+      ok: true,
+      json: () =>
+        Promise.resolve({
+          session: false,
+          maker_running: false,
+          coinjoin_in_process: false,
+          wallet_name: 'None',
+        }),
+    })
+    apiMock.getWalletAll.mockResolvedValueOnce({
+      ok: true,
+      json: () => Promise.resolve({ wallets: [] }),
+    })
+    apiMock.getGetinfo.mockResolvedValueOnce({
+      ok: true,
+      json: () => Promise.resolve({ version: '0.9.9' }),
+    })
+
+    act(() => setup({}))
+
+    expect(screen.getByText('wallets.text_loading')).toBeInTheDocument()
+    await waitForElementToBeRemoved(screen.getByText('wallets.text_loading'))
+
+    expect(screen.queryByTestId('import-wallet-btn')).not.toBeInTheDocument()
+    expect(screen.getByTestId('new-wallet-btn')).toBeInTheDocument()
+  })
+
   describe('<Wallets /> lock/unlock flow', () => {
     const dummyWalletName = 'dummy.jmdat'
     const dummyToken = 'dummyToken'

src/constants/features.ts

@@ -0,0 +1,26 @@
+import { ServiceInfo } from '../context/ServiceInfoContext'
+
+interface Features {
+  importWallet: SemVer
+  rescanChain: SemVer
+}
+
+const features: Features = {
+  importWallet: { major: 0, minor: 9, patch: 10 }, // added in https://github.com/JoinMarket-Org/joinmarket-clientserver/pull/1461
+  rescanChain: { major: 0, minor: 9, patch: 10 }, // added in https://github.com/JoinMarket-Org/joinmarket-clientserver/pull/1461
+}
+
+type Feature = keyof Features
+
+const __isFeatureEnabled = (name: Feature, version: SemVer): boolean => {
+  const target = features[name]
+  return (
+    version.major > target.major ||
+    (version.major === target.major && version.minor > target.minor) ||
+    (version.major === target.major && version.minor === target.minor && version.patch >= target.patch)
+  )
+}
+
+export const isFeatureEnabled = (name: Feature, serviceInfo: ServiceInfo): boolean => {
+  return !!serviceInfo.server?.version && __isFeatureEnabled(name, serviceInfo.server.version)
+}

src/context/ServiceInfoContext.tsx

@@ -53,21 +53,56 @@ interface JmSessionData {
   rescanning: boolean
 }
 
+interface JmGetInfoData {
+  version: string
+}
+
+const UNKNOWN_VERSION: SemVer = { major: 0, minor: 0, patch: 0, raw: 'unknown' }
+
 type SessionFlag = { sessionActive: boolean }
 type MakerRunningFlag = { makerRunning: boolean }
 type CoinjoinInProgressFlag = { coinjoinInProgress: boolean }
 type RescanBlockchainInProgressFlag = { rescanning: boolean }
 
+type SessionInfo = {
+  walletName: Api.WalletName | null
+  schedule: Schedule | null
+  offers: Offer[] | null
+  nickname: string | null
+}
+type ServerInfo = {
+  server?: {
+    version?: SemVer
+  }
+}
+
 type ServiceInfo = SessionFlag &
   MakerRunningFlag &
   CoinjoinInProgressFlag &
-  RescanBlockchainInProgressFlag & {
-    walletName: Api.WalletName | null
-    schedule: Schedule | null
-    offers: Offer[] | null
-    nickname: string | null
+  RescanBlockchainInProgressFlag &
+  SessionInfo &
+  ServerInfo
+type ServiceInfoUpdate =
+  | ServiceInfo
+  | MakerRunningFlag
+  | CoinjoinInProgressFlag
+  | RescanBlockchainInProgressFlag
+  | ServerInfo
+
+const versionRegex = new RegExp(/^(\d+)\.(\d+)\.(\d+).*$/)
+const toSemVer = (data: JmGetInfoData): SemVer => {
+  const arr = versionRegex.exec(data.version)
+  if (!arr || arr.length < 4) {
+    return UNKNOWN_VERSION
   }
-type ServiceInfoUpdate = ServiceInfo | MakerRunningFlag | CoinjoinInProgressFlag | RescanBlockchainInProgressFlag
+
+  return {
+    major: parseInt(arr[1], 10),
+    minor: parseInt(arr[2], 10),
+    patch: parseInt(arr[3], 10),
+    raw: data.version,
+  }
+}
 
 interface ServiceInfoContextEntry {
   serviceInfo: ServiceInfo | null
@@ -91,6 +126,34 @@ const ServiceInfoProvider = ({ children }: React.PropsWithChildren<{}>) => {
   )
   const [connectionError, setConnectionError] = useState<Error>()
 
+  useEffect(() => {
+    const abortCtrl = new AbortController()
+
+    Api.getGetinfo({ signal: abortCtrl.signal })
+      .then((res) => (res.ok ? res.json() : Api.Helper.throwError(res)))
+      .then((data: JmGetInfoData) => {
+        dispatchServiceInfo({
+          server: {
+            version: toSemVer(data),
+          },
+        })
+      })
+      .catch((err) => {
+        const notFound = err.response.status === 404
+        if (notFound) {
+          dispatchServiceInfo({
+            server: {
+              version: UNKNOWN_VERSION,
+            },
+          })
+        }
+      })
+
+    return () => {
+      abortCtrl.abort()
+    }
+  }, [connectionError])
+
   useEffect(() => {
     if (connectionError) {
       // Just reset the wallet info, not the session storage (token),
@@ -262,6 +325,7 @@ export {
   useReloadServiceInfo,
   useDispatchServiceInfo,
   useSessionConnectionError,
+  ServiceInfo,
   Schedule,
   StateFlag,
 }

src/globals.d.ts

@@ -8,3 +8,5 @@ type Seconds = number
 declare type MnemonicPhrase = string[]
 
 declare type SimpleAlert = import('react-bootstrap').AlertProps & { message: string | import('react').ReactNode }
+
+declare type SemVer = { major: number; minor: number; patch: number; raw?: string }

src/libs/JmWalletApi.ts

@@ -210,6 +210,12 @@ const Helper = (() => {
   }
 })()
 
+const getGetinfo = async ({ signal }: ApiRequestContext) => {
+  return await fetch(`${basePath()}/v1/getinfo`, {
+    signal,
+  })
+}
+
 const getSession = async ({ token, signal }: ApiRequestContext & { token?: ApiToken }) => {
   return await fetch(`${basePath()}/v1/session`, {
     headers: token ? { ...Helper.buildAuthHeader(token) } : undefined,
@@ -465,6 +471,7 @@ export class JmApiError extends Error {
 }
 
 export {
+  getGetinfo,
   postMakerStart,
   getMakerStop,
   getSession,