wepin_flutter_widget_sdk 0.0.1

A Flutter package of Wepin Widget SDK

wepin_flutter_widget_sdk

Wepin Widget SDK for Flutter. This package is exclusively available for use in Android and iOS environments.

⏩ Get App ID and Key

After signing up for Wepin Workspace, navigate to the development tools menu, and enter the required information for each app platform to receive your App ID and App Key.

⏩ Requirements

• Android API version 21 or newer is required.
  • Set compileSdkVersion to 34 in the android/app/build.gradle file.
• iOS version 13 or newer is required.
  • Update the platform :ios version to 13.0 in the ios/Podfile of your Flutter project. Verify and modify the ios/Podfile as needed.

⏩ Install

Add the wepin_flutter_widget_sdk dependency in your pubspec.yaml file:

dependencies:
  wepin_flutter_widget_sdk: ^0.0.1

or run the following command:

flutter pub add wepin_flutter_widget_sdk

⏩ Getting Started

Config Deep Link

To enable OAuth login functionality (login.loginWithOauthProvider), you need to configure the Deep Link Scheme.

Deep Link scheme format : wepin. + Your Wepin App ID

Android

When a custom scheme is used, the WepinWidget SDK can be easily configured to capture all redirects using this custom scheme through a manifest placeholder in the build.gradle (app) file::

// For Deep Link => RedirectScheme Format: wepin. + Wepin App ID
android.defaultConfig.manifestPlaceholders = [
  'appAuthRedirectScheme': 'wepin.{{YOUR_WEPIN_APPID}}'
]

iOS

You must add the app's URL scheme to the Info.plist file. This is necessary for redirection back to the app after the authentication process.

The value of the URL scheme should be 'wepin.' + your Wepin app id.

<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleURLName</key>
        <string>unique name</string>
        <key>CFBundleURLSchemes</key>
        <array>
            <string>wepin.{{YOUR_WEPIN_APPID}}</string>
        </array>
    </dict>
</array>

Add Permssion

To use this SDK, camera access permission is required. The camera function is essential for recognizing addresses in QR code format. [Reference: permission_handle]

Android

Add the below line in your app's AndroidMainfest.xml file

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
  <uses-permission android:name="android.permission.CAMERA" />
  <uses-permission android:name="android.permission.INTERNET" />
  <!-- ... -->
</manifest>

iOS

1. Update Podfile: Add a camera permission to your Podfile file:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)

    target.build_configurations.each do |config|
      # For more information, refer to https://github.com/BaseflowIT/flutter-permission-handler/blob/master/permission_handler/ios/Classes/PermissionHandlerEnums.h
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',
        ## dart: PermissionGroup.camera
        'PERMISSION_CAMERA=1',
        ]
    end
  end
end

2. Update Info.plist: Update your Info.plist with the required permission usage descriptions:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <!-- 🚨 Keep only the permissions used in your app 🚨 -->
  <key>NSCameraUsageDescription</key>
  <string>YOUR TEXT</string>
  <!-- … -->
</dict>
</plist>

⏩ Import SDK

import 'package:wepin_flutter_widget_sdk/wepin_flutter_widget_sdk.dart';
import 'package:wepin_flutter_widget_sdk/wepin_flutter_widget_sdk_type.dart';

⏩ Initialize

WepinWidgetSDK wepinSDK = WepinWidgetSDK(wepinAppKey: wepinAppKey, wepinAppId: wepinAppId);

init

await wepinSDK.init({WidgetAttributes? attributes})

Parameters

• attributes <WidgetAttributes> optional - An optional object to configure widget attributes.
  • defaultLanguage <String> - The language to be displayed on the widget (default: 'ko'). Currently, only 'ko', 'en', and 'ja' are supported.
  • defaultCurrency <String> - The currency to be displayed on the widget (default: 'KRW'). Currently, only 'KRW', 'USD', and 'JPY' are supported.

Example

await wepinSDK.init(WidgetAttributes(defaultLanguage: 'ko', defaultCurrency: 'KRW'))

isInitialized

wepinSDK.isInitialized()

The isInitialized() method checks if the Wepin Widget SDK is initialized.

Returns

• Future<bool> - Returns true if Wepin Widget SDK is already initialized, otherwise false.

changeLanguage

wepinSDK.changeLanguage({language, currency})

The changeLanguage() method changes the language and currency of the widget.

Parameters

• language <String> - The language to be displayed on the widget. Currently, only 'ko', 'en', and 'ja' are supported.
• currency <String> - The currency to be displayed on the widget. Currently, only 'KRW', 'USD', and 'JPY' are supported.

Returns

• void

Example

wepinSDK.changeLanguage(
  language: 'ko',
  currency: 'KRW'
);

getStatus

await wepinSDK.getStatus()

The getStatus() method returns the lifecycle status of Wepin SDK.

Parameters

• None

Returns

• Future<WepinLifeCycle> - Returns the current lifecycle of the Wepin SDK, which is defined as follows:
  • notInitialized: Wepin is not initialized.
  • initializing: Wepin is in the process of initializing.
  • initialized: Wepin is initialized.
  • beforeLogin: Wepin is initialized but the user is not logged in.
  • login:The user is logged in.
  • loginBeforeRegister: The user is logged in but not registered in Wepin.

Example

final status = await wepinSDK.getStatus();

⏩ Method & Variable

Methods and Variables can be used after initialization of Wepin Widget SDK.

login

The login variable is a Wepin login library that includes various authentication methods, allowing users to log in using different approaches. It supports email and password login, OAuth provider login, login using ID tokens or access tokens, and more. For detailed information on each method, please refer to the official library documentation at wepin_flutter_login_lib.

Available Methods

• loginWithOauthProvider
• signUpWithEmailAndPassword
• loginWithEmailAndPassword
• loginWithIdToken
• loginWithAccessToken
• getRefreshFirebaseToken
• loginWepin
• getCurrentWepinUser
• logout
• getSignForLogin

These methods support various login scenarios, allowing you to select the appropriate method based on your needs.

For detailed usage instructions and examples for each method, please refer to the official library documentation. The documentation includes explanations of parameters, return values, exception handling, and more.

Example

// Login using an OAuth provider
final oauthResult = await wepinSDK.login.loginWithOauthProvider(provider: 'google', clientId: 'your-client-id');

// Sign up and log in using email and password
final signUpResult = await wepinSDK.login.signUpWithEmailAndPassword(email: '[e-mail]', password: 'password123');

// Log in using an ID token
final idTokenResult = await wepinSDK.login.loginWithIdToken(idToken: 'your-id-token', sign: 'your-sign');

// Log in to Wepin
final wepinLoginResult = await wepinSDK.login.loginWepin(idTokenResult);

// Get the currently logged-in user
final currentUser = await wepinSDK.login.getCurrentWepinUser();

// Logout
await wepinSDK.login.logout();

For more details on each method and to see usage examples, please visit the official wepin_flutter_login_lib documentation.

openWidget

await wepinSDK.openWidget(BuildContext context)

The openWidget() method displays the Wepin widget. If a user is not logged in, the widget will not open. Therefore, you must log in to Wepin before using this method. To log in to Wepin, use the loginWepin method from the login variable.

Parameters

• context <BuildContext> - The BuildContext parameter is essential in Flutter as it represents the location of a widget in the widget tree. This context is used by Flutter to locate the widget's position in the tree and to provide various functions like navigation, accessing theme data, and more. When you call openWidget, you pass the current context to ensure that the widget is displayed within the correct part of the UI hierarchy.

Returns

• Future <void> - A Future that completes when the widget is successfully opened.

Example

await wepinSDK.openWidget(context);

closeWidget

wepinSDK.closeWidget()

The closeWidget() method closes the Wepin widget.

Parameters

• None - This method does not take any parameters.

Returns

• void - This method does not return any value.

Example

wepinSDK.closeWidget();

register

await wepinSDK.register(BuildContext context)

The register method registers the user with Wepin. After joining and logging in, this method opens the Register page of the Wepin widget, allowing the user to complete registration (wipe and account creation) for the Wepin service.

This method is only available if the lifecycle of the WepinSDK is WepinLifeCycle.loginBeforeRegister. After calling the loginWepin() method in the login variable, if the loginStatus value in the userStatus is not 'complete', this method must be called.

Parameters

• context <BuildContext> - The BuildContext parameter is essential in Flutter as it represents the location of a widget in the widget tree. This context is used by Flutter to locate the widget's position in the tree and to provide various functions like navigation, accessing theme data, and more. When you call register, you pass the current context to ensure that the widget is displayed within the correct part of the UI hierarchy.

Returns

• Future<WepinUser>
  • status <'success'|'fail'>
  • userInfo <WepinUserInfo> optional
    • userId <String>
    • email <String>
    • provider <'google'|'apple'|'naver'|'discord'|'email'|'external_token'>
    • use2FA <bool>
  • userStatus: <WepinUserStatus> - The user's status in Wepin login, including:
    • loginStatus: <'complete' | 'pinRequired' | 'registerRequired'> - If the user's loginStatus value is not complete, registration in Wepin is required.
    • pinRequired?:
  • walletId <String> optional
  • token <WepinToken> - Wepin Token

Exception

• WepinError

Example

final userInfo = await wepinSDK.register(context);

getAccounts

await wepinSDK.getAccounts({List<String>? networks, bool? withEoa})

The getAccounts() method returns user accounts. It is recommended to use this method without arguments to retrieve all user accounts. It can only be used after widget login.

Parameters

• networks: <List<String>> optional A list of network names to filter the accounts.
• withEoa: <bool> optional Whether to include EOA accounts if AA accounts are included.

Returns

• Future <List<WepinAccount>> - A future that resolves to a list of the user's accounts.
  • address <String>
  • network <String>
  • contract <String> optional The token contract address.
  • isAA <bool> optional Whether it is an AA account or not.

Exception

• WepinError

Example

final result = await wepinSDK.getAccounts(
  networks: ['Ethereum'], 
  withEoa: true
)

• response

[
  WepinAccount(
    address: "0x0000001111112222223333334444445555556666",
    network: "Ethereum",
  ),
  WepinAccount(
    address: "0x0000001111112222223333334444445555556666",
    network: "Ethereum",
    contract: "0x777777888888999999000000111111222222333333",
  ),
  WepinAccount(
    address: "0x4444445555556666000000111111222222333333",
    network: "Ethereum",
    isAA: true,
  ),
]

getBalance

await wepinSDK.getBalance({List<WepinAccount>? accounts})

The getBalance() method returns the balance information for specified accounts. It can only be used after the widget is logged in. To get the balance information for all user accounts, use the getBalance() method without any arguments.

Parameters

• accounts <List<WepinAccount>> optional - A list of accounts for which to retrieve balance information.
  • network <String> - The network associated with the account.
  • address <String> - The address of the account.
  • isAA <bool> optional - Indicates whether the account is an AA (Account Abstraction) account.

Returns

• Future <List<WepinAccountBalanceInfo>> - A future that resolves to a list of balance information for the specified accounts.
  • network <String> - The network associated with the account.
  • address <String> - The address of the account.
  • symbol <String> - The symbol of the account's balance.
  • balance <String> - The balance of the account.
  • tokens <List<WepinTokenBalanceInfo>> - A list of token balance information for the account.
    • symbol <String> - The symbol of the token.
    • balance <String> - The balance of the token.
    • contract <String> - The contract address of the token.

Exception

• WepinError

Example

final result = await wepinSDK.getBalance([WepinAccount(
  address: '0x0000001111112222223333334444445555556666',
  network: 'Ethereum',
)]);

• response

[
    WepinAccountBalanceInfo(
        network: "Ethereum",
        address: "0x0000001111112222223333334444445555556666",
        symbol: "ETH",
        balance: "1.1",
        tokens:[
            WepinTokenBalanceInfo(
                contract: "0x123...213",
                symbol: "TEST",
                balance: "10"
            ),
        ]
    )
]

getNFTs

await wepinSDK.getNFTs({required bool refresh, List<String>? networks})

The getNFTs() method returns user NFTs. It is recommended to use this method without the networks argument to get all user NFTs. This method can only be used after the widget is logged in.

Parameters

• refresh <bool> - A required parameter to indicate whether to refresh the NFT data.
• networks <List<String>> optional - A list of network names to filter the NFTs.

Returns

• Future <List<WepinNFT>> - A future that resolves to a list of the user's NFTs.
  • account <WepinAccount>
    • address <String> - The address of the account associated with the NFT.
    • network <String> - The network associated with the NFT.
    • contract <String> optional The token contract address.
    • isAA <bool> optional Indicates whether the account is an AA (Account Abstraction) account.
  • contract <WepinNFTContract>
    • name <String> - The name of the NFT contract.
    • address <String> - The contract address of the NFT.
    • scheme <String> - The scheme of the NFT.
    • description <String> optional - A description of the NFT contract.
    • network <String> - The network associated with the NFT contract.
    • externalLink <String> optional - An external link associated with the NFT contract.
    • imageUrl <String> optional - An image URL associated with the NFT contract.
  • name <String> - The name of the NFT.
  • description <String> - A description of the NFT.
  • externalLink <String> - An external link associated with the NFT.
  • imageUrl <String> - An image URL associated with the NFT.
  • contentUrl <String> optional - A URL pointing to the content associated with the NFT.
  • quantity <int> - The quantity of the NFT.
  • contentType <String> - The content type of the NFT.
  • state <int> - The state of the NFT.

Exception

• WepinError

Example

final result = await wepinSDK.getNFTs(refresh: true, networks: ['Ethereum']);

• response

[
  WepinNFT(
    account: WepinAccount(
      address: "0x0000001111112222223333334444445555556666",
      network: "Ethereum",
      contract: "0x777777888888999999000000111111222222333333",
      isAA: true,
    ),
    contract: WepinNFTContract(
      name: "NFT Collection",
      address: "0x777777888888999999000000111111222222333333",
      scheme: "ERC721",
      description: "An example NFT collection",
      network: "Ethereum",
      externalLink: "https://example.com",
      imageUrl: "https://example.com/image.png",
    ),
    name: "Sample NFT",
    description: "A sample NFT description",
    externalLink: "https://example.com/nft",
    imageUrl: "https://example.com/nft-image.png",
    contentUrl: "https://example.com/nft-content.png",
    quantity: 1,
    contentType: "image/png",
    state: 0,
  ),
]

send

await wepinSDK.send(BuildContext context, {required WepinAccount account, WepinTxData? txData})

The send() method sends a transaction and returns the transaction ID information. This method can only be used after the widget is logged in.

Parameters

• context <BuildContext> - The BuildContext parameter is essential in Flutter as it represents the location of a widget in the widget tree. This context is used by Flutter to locate the widget's position in the tree and to provide various functions like navigation, accessing theme data, and more. When you call send, you pass the current context to ensure that the widget is displayed within the correct part of the UI hierarchy.
• account <WepinAccount> - The account from which the transaction will be sent.
  • network <String> - The network associated with the account.
  • address <String> - The address of the account.
• txData <WepinTxData> optional - The transaction data to be sent.
  • to <String> - The address to which the transaction is being sent.
  • amount <String> - The amount of the transaction.

Returns

• Future <WepinSendResponse> - A future that resolves to a response containing the transaction ID.
  • txId <String> - The ID of the sent transaction.

Exception

• WepinError

Example

final result = await wepinSDK.send(context, {
    account: WepinAccount(
        address: '0x0000001111112222223333334444445555556666',
        network: 'Ethereum',
    ),
    txData: WepinTxData(
        to: '0x9999991111112222223333334444445555556666',
        amount: '0.1',
    )
})

• response

WepinSendResponse(
    txId: "0x76bafd4b700ed959999d08ab76f95d7b6ab2249c0446921c62a6336a70b84f32"
)

finalize

await wepinSDK.finalize()

The finalize() method finalizes the Wepin SDK, releasing any resources or connections it has established.

Parameters

• None - This method does not take any parameters.

Returns

• Future<void> - A future that completes when the SDK has been finalized.

Example

await wepinSDK.finalize();

WepinError

This section provides descriptions of various error codes that may be encountered while using the Wepin SDK functionalities. Each error code corresponds to a specific issue, and understanding these can help in debugging and handling errors effectively.

Error Code	Error Message	Error Description
invalidAppKey	"InvalidAppKey"	The Wepin app key is invalid.
invalidParameters `	"InvalidParameters"	One or more parameters provided are invalid or missing.
invalidLoginProvider	"InvalidLoginProvider"	The login provider specified is not supported or is invalid.
invalidToken	"InvalidToken"	The token does not exist.
invalidLoginSession	"InvalidLoginSession"	The login session information does not exist.
notInitialized	"NotInitialized"	The WepinLoginLibrary has not been properly initialized.
alreadyInitialized	"AlreadyInitialized"	The WepinLoginLibrary is already initialized, so the logout operation cannot be performed again.
userCancelled	"UserCancelled"	The user has cancelled the operation.
unknownError	"UnknownError"	An unknown error has occurred, and the cause is not identified.
notConnectedInternet	"NotConnectedInternet"	The system is unable to detect an active internet connection.
failedLogin	"FailedLogin"	The login attempt has failed due to incorrect credentials or other issues.
alreadyLogout	"AlreadyLogout"	The user is already logged out, so the logout operation cannot be performed again.
invalidEmailDomain	"InvalidEmailDomain"	The provided email address's domain is not allowed or recognized by the system.
failedSendEmail	"FailedSendEmail"	The system encountered an error while sending an email. This is because the email address is invalid or we sent verification emails too often. Please change your email or try again after 1 minute.
requiredEmailVerified	"RequiredEmailVerified"	Email verification is required to proceed with the requested operation.
incorrectEmailForm	"incorrectEmailForm"	The provided email address does not match the expected format.
incorrectPasswordForm	"IncorrectPasswordForm"	The provided password does not meet the required format or criteria.
notInitializedNetwork	"NotInitializedNetwork"	The network or connection required for the operation has not been properly initialized.
requiredSignupEmail	"RequiredSignupEmail"	The user needs to sign up with an email address to proceed.
failedEmailVerified	"FailedEmailVerified"	The WepinLoginLibrary encountered an issue while attempting to verify the provided email address.
failedPasswordStateSetting	"FailedPasswordStateSetting"	Failed to set the password state. This error may occur during password management operations, potentially due to invalid input or system issues.
failedPasswordSetting	"failedPasswordSetting"	Failed to set the password. This could be due to issues with the provided password or internal errors during the password setting process.
existedEmail	"ExistedEmail"	The provided email address is already registered. This error occurs when attempting to sign up with an email that is already in use.
apiRequestError	"ApiRequestError"	There was an error while making the API request. This can happen due to network issues, invalid endpoints, or server errors.
incorrectLifecycleException	"IncorrectLifecycleException"	The lifecycle of the Wepin SDK is incorrect for the requested operation. Ensure that the SDK is in the correct state (e.g., initialized and login) before proceeding.
failedRegister	"FailedRegister"	Failed to register the user. This can occur due to issues with the provided registration details or internal errors during the registration process.
accountNotFound	"AccountNotFound"	The specified account was not found. This error is returned when attempting to access an account that does not exist in the Wepin.
nftNotFound	"NftNotFound"	The specified NFT was not found. This error occurs when the requested NFT does not exist or is not accessible within the user's account.
failedSend	"FailedSend"	Failed to send the required data or request. This error could be due to network issues, incorrect data, or internal server errors.