Refactor WalletPersistence to use Platform Agnostic Storage Provider

README.md

@@ -81,10 +81,10 @@ those directories.
 
 Directory               | Description
 ------------------------|-------------
-`/.github`              | workflow for shift left automation
-`/app/api`              | api & middlewares for application, non-UI logic
+`/.github`              | GitHub Workflow for shift left automation
+`/app/api`              | API and middlewares logic for application, for non-UI logic only
 `/app/assets`           | assets of the project that can be loaded at startup
-`/app/components`       | top level components for a shared design language
+`/app/components`       | top level components for a atomic shared design language
 `/app/contexts`         | shared contexts for application, non-UI logic
 `/app/hooks`            | shared hooks for application, for UI logic only
 `/app/screens`          | screens hierarchy tree matching directory hierarchy tree

__mocks__/expo-secure-store.ts

@@ -0,0 +1,5 @@
+export default {
+  getItemAsync: jest.fn(),
+  setItemAsync: jest.fn(),
+  deleteItemAsync: jest.fn()
+}

app/api/index.ts

@@ -0,0 +1,3 @@
+export * from './wallet/persistence'
+export * from './storage'
+export * from './logging'

app/api/storage/index.test.ts

@@ -0,0 +1,138 @@
+import ExpoSecureStore from "expo-secure-store";
+import { EnvironmentNetwork } from "../../environment";
+import { StorageAPI } from "./index";
+
+// TODO(fuxingloh): 'jest-expo' only test native (provider.native.ts) by default, need to improve testing capability
+
+const getItem = jest.spyOn(ExpoSecureStore, 'getItemAsync')
+const setItem = jest.spyOn(ExpoSecureStore, 'setItemAsync')
+const removeItem = jest.spyOn(ExpoSecureStore, 'deleteItemAsync')
+
+beforeEach(() => {
+  jest.clearAllMocks()
+})
+
+describe('network', () => {
+  it('should default to Local Playground', async () => {
+    expect(await StorageAPI.getNetwork()).toBe(EnvironmentNetwork.LocalPlayground)
+    expect(getItem).toBeCalled()
+  });
+
+  it('should call setItem', async () => {
+    await StorageAPI.setNetwork(EnvironmentNetwork.RemotePlayground)
+    expect(setItem).toBeCalled()
+  });
+
+  it('should get Local Playground', async () => {
+    getItem.mockResolvedValue(EnvironmentNetwork.LocalPlayground)
+    expect(await StorageAPI.getNetwork()).toBe(EnvironmentNetwork.LocalPlayground)
+  });
+
+  it('should get Local Playground', async () => {
+    getItem.mockResolvedValue(EnvironmentNetwork.RemotePlayground)
+    expect(await StorageAPI.getNetwork()).toBe(EnvironmentNetwork.RemotePlayground)
+  });
+
+  it('should errored as network is not part of environment', async () => {
+    await expect(StorageAPI.setNetwork(EnvironmentNetwork.MainNet))
+      .rejects.toThrow('network is not part of environment')
+  });
+})
+
+describe('item', () => {
+  beforeEach(() => {
+    getItem.mockResolvedValue(EnvironmentNetwork.RemotePlayground)
+  })
+
+  it('should getItem with environment and network prefixed key', async () => {
+    await StorageAPI.getItem('get')
+    expect(getItem).toBeCalledTimes(2)
+    expect(getItem).toBeCalledWith('Development.NETWORK')
+    expect(getItem).toBeCalledWith('Development.Remote Playground.get')
+  })
+
+  it('should setItem with environment and network prefixed key', async () => {
+    await StorageAPI.setItem('set', 'value')
+    expect(setItem).toBeCalledWith('Development.Remote Playground.set', 'value')
+  })
+
+  it('should removeItem with environment and network prefixed key', async () => {
+    await StorageAPI.removeItem('remove')
+    expect(removeItem).toBeCalledWith('Development.Remote Playground.remove')
+  })
+})
+
+describe('byte length validation', () => {
+  beforeEach(() => {
+    getItem.mockResolvedValue(EnvironmentNetwork.LocalPlayground)
+  })
+
+  it('should set if 1 byte length', async () => {
+    await StorageAPI.setItem('key', '1')
+    expect(setItem).toBeCalledWith('Development.Local Playground.key', '1')
+  })
+
+  it('should set if 100 byte length', async () => {
+    await StorageAPI.setItem('key', '0000000000100000000020000000003000000000400000000050000000006000000000700000000080000000009000000000')
+    expect(setItem).toBeCalledWith('Development.Local Playground.key', '0000000000100000000020000000003000000000400000000050000000006000000000700000000080000000009000000000')
+  })
+
+  function generateText (length: number, sequence: string) {
+    let text = ''
+    for (let i = 0; i < length; i++) {
+      text += sequence
+    }
+    return text
+  }
+
+  it('should set if 2047 byte length', async () => {
+    const text = generateText(2047, '0')
+
+    await StorageAPI.setItem('key', text)
+    expect(setItem).toBeCalledWith('Development.Local Playground.key', text)
+  })
+
+  it('should error if 2048 byte length', async () => {
+    const text = generateText(2048, '0')
+    const promise = StorageAPI.setItem('key', text)
+    await expect(promise).rejects.toThrow('value exceed 2048 bytes, unable to setItem')
+  })
+
+  it('should error if 2049 byte length', async () => {
+    const text = generateText(2049, '0')
+
+    const promise = StorageAPI.setItem('key', text)
+    await expect(promise).rejects.toThrow('value exceed 2048 bytes, unable to setItem')
+  })
+
+  describe('utf-8 1-4 char', () => {
+    it('should set if 3 byte length utf-8', async () => {
+      const text = generateText(1, '好')
+
+      await StorageAPI.setItem('key', text)
+      expect(setItem).toBeCalledWith('Development.Local Playground.key', text)
+    })
+
+    it('should set if 2046 byte length utf-8', async () => {
+      const text = generateText(682, '好')
+
+      await StorageAPI.setItem('key', text)
+      expect(setItem).toBeCalledWith('Development.Local Playground.key', text)
+    })
+
+
+    it('should error if 2049 byte length', async () => {
+      const text = generateText(683, '好')
+
+      const promise = StorageAPI.setItem('key', text)
+      await expect(promise).rejects.toThrow('value exceed 2048 bytes, unable to setItem')
+    })
+
+    it('should error if 3072 byte length', async () => {
+      const text = generateText(1024, '好')
+
+      const promise = StorageAPI.setItem('key', text)
+      await expect(promise).rejects.toThrow('value exceed 2048 bytes, unable to setItem')
+    })
+  })
+})

app/api/storage/index.ts

@@ -0,0 +1,71 @@
+import { EnvironmentNetwork, getEnvironment } from '../../environment'
+import { StorageProvider } from './provider'
+
+/**
+ * @return EnvironmentNetwork if invalid, will be set to `networks[0]`
+ */
+async function getNetwork (): Promise<EnvironmentNetwork> {
+  const env = getEnvironment()
+  const network = await StorageProvider.getItem(`${env.name}.NETWORK`)
+
+  if ((env.networks as any[]).includes(network)) {
+    return network as EnvironmentNetwork
+  }
+
+  await setNetwork(env.networks[0])
+  return env.networks[0]
+}
+
+/**
+ * @param network {EnvironmentNetwork} with set with 'environment' prefixed
+ */
+async function setNetwork (network: EnvironmentNetwork): Promise<void> {
+  const env = getEnvironment()
+
+  if (!env.networks.includes(network)) {
+    throw new Error('network is not part of environment')
+  }
+
+  await StorageProvider.setItem(`${env.name}.NETWORK`, network)
+}
+
+async function getKey (key: string): Promise<string> {
+  const env = getEnvironment()
+  const network = await getNetwork()
+  return `${env.name}.${network}.${key}`
+}
+
+/**
+ * @param key {string} of item with 'environment' and 'network' prefixed
+ * @return {string | null}
+ */
+async function getItem (key: string): Promise<string | null> {
+  return await StorageProvider.getItem(await getKey(key))
+}
+
+/**
+ * @param key {string} of item with 'environment' and 'network' prefixed
+ * @param value {string} to set
+ * @throws Error when byte length exceed 2048 bytes
+ */
+async function setItem (key: string, value: string): Promise<void> {
+  if (Buffer.byteLength(value, 'utf-8') >= 2048) {
+    throw new Error('value exceed 2048 bytes, unable to setItem')
+  }
+  return await StorageProvider.setItem(await getKey(key), value)
+}
+
+/**
+ * @param key {string} of item with 'environment' and 'network' prefixed
+ */
+async function removeItem (key: string): Promise<void> {
+  await StorageProvider.removeItem(await getKey(key))
+}
+
+export const StorageAPI = {
+  getNetwork,
+  setNetwork,
+  getItem,
+  setItem,
+  removeItem
+}

app/api/storage/provider/index.ts

@@ -0,0 +1,15 @@
+import { Provider } from './provider'
+
+/**
+ * Provider storage interface for platform agnostic storage provider
+ */
+export interface IStorage {
+  getItem: (key: string) => Promise<string | null>
+  setItem: (key: string, value: string) => Promise<void>
+  removeItem: (key: string) => Promise<void>
+}
+
+/**
+ * Platform agnostic storage provider
+ */
+export const StorageProvider = Provider

app/api/storage/provider/provider.native.ts

@@ -0,0 +1,8 @@
+import ExpoSecureStore from 'expo-secure-store'
+import { IStorage } from './index'
+
+export const Provider: IStorage = {
+  getItem: ExpoSecureStore.getItemAsync,
+  setItem: ExpoSecureStore.setItemAsync,
+  removeItem: ExpoSecureStore.deleteItemAsync
+}

app/api/storage/provider/provider.ts

@@ -0,0 +1,11 @@
+import AsyncStorage from '@react-native-async-storage/async-storage'
+import { IStorage } from './index'
+
+/**
+ * NOTE: We don't officially support web platform yet.
+ */
+export const Provider: IStorage = {
+  getItem: AsyncStorage.getItem,
+  setItem: AsyncStorage.setItem,
+  removeItem: AsyncStorage.removeItem
+}