Methods

Below are the methods provided by the Wepin Flutter Login Library.

loginWithOauthProvider

await wepinLogin.loginWithOauthProvider({required String provider, required String clientId})

Opens an in-app browser and logs in to the OAuth provider. To retrieve Firebase login information, you need to call the loginWithIdToken() or loginWithAccessToken() methods.

Parameters

• provider <String>

  The OAuth login provider (e.g., 'google', 'naver', 'discord', 'apple')

• clientId <String>

  The client ID of the OAuth login provider

Returns

• Future<LoginOauthResult>

  • provider <String>

    The name of the OAuth provider used

  • token <String>

    The accessToken (if provider is "naver" or "discord") or idToken (if provider is "google" or "apple")

  • type <WepinOauthTokenType>

    The type of OAuth token (e.g., idToken, accessToken)

Exception

• WepinError

Example

final user = await wepinLogin.loginWithOauthProvider(
  provider: "google",
  clientId: "your-google-client-id"
);

---

signUpWithEmailAndPassword

await wepinLogin.signUpWithEmailAndPassword({required String email, required String password, String? locale})

Signs up to Wepin Firebase using an email and password. If the sign-up is successful, it returns Firebase login information.

Parameters

• email <String>

  User email

• password <String>

  User password

• locale <String> optional

  Language for the verification email (default value: "en")

Returns

• Future<LoginResult>

  • provider <String>

    The provider used for the login (in this case, 'email')

  • token <WepinFBToken>

    • idToken <String>

      The Wepin Firebase ID token

    • refreshToken <String>

      The Wepin Firebase refresh token

Exception

• WepinError

Example

final user = await wepinLogin.signUpWithEmailAndPassword(
  email: '[e-mail]', 
  password: 'abcdef123&'
);

---

loginWithEmailAndPassword

await wepinLogin.loginWithEmailAndPassword({required String email, required String password})

Logs in to Wepin Firebase using an email and password. If the login is successful, it returns Firebase login information.

Parameters

• email <String> User email

• password <String> User password

Returns

• Future<LoginResult>

  • provider <String>

    The provider used for the login (in this case, 'email')

  • token <WepinFBToken>

    • idToken <String>

      The Wepin Firebase ID token

    • refreshToken <String>

      The Wepin Firebase refresh token

Exception

• WepinError

Example

final user = await wepinLogin.loginWithEmailAndPassword(
  email: '[e-mail]', 
  password: 'abcdef123&'
);

---

loginWithIdToken

await wepinLogin.loginWithIdToken({required String idToken, required String sign})

Logs in to Wepin Firebase using an external ID token. If the login is successful, it returns Firebase login information.

Parameters

• idToken <String> ID token value to be used for login

• sign <String>optional Signature value for the token provided as the first parameter (returned value of getSignForLogin())

  Starting from wepin_flutter_login_lib version 0.0.5, the sign value is optional. If you choose to remove the authentication key issued from the Wepin Workspace, you may opt not to use the signvalue. (Wepin Workspace > Development Tools menu > Login tab > Auth Key > Delete)

  The Auth Key menu is visible only if an authentication key was previously generated.

Returns

• Future<LoginResult>

  • provider <String> - The provider used for the login (in this case, 'external_token').

  • token <WepinFBToken>

    • idToken <String>

      The Wepin Firebase ID token

    • refreshToken <String>

      The Wepin Firebase refresh token

Exception

• WepinError

Example

final user = await wepinLogin.loginWithIdToken(
    idToken:'eyJHGciO....adQssw5c', 
    sign:'9753d4dc...c63466b9'
);

---

loginWithAccessToken

await wepinLogin.loginWithAccessToken({required String provider, required String accessToken, required String sign})

Logs in to Wepin Firebase using an external access token. If the login is successful, it returns Firebase login information.

Parameters

• provider <"naver"|"discord">

  Provider that issued the access token

• accessToken <String>

  Access token value to be used for login

• sign <String> optional

  Signature value for the Access token (returned value of getSignForLogin())

  Starting from wepin_flutter_login_lib version 0.0.5, the sign value is optional. If you choose to remove the authentication key issued from the Wepin Workspace, you may opt not to use the signvalue.

  (Wepin Workspace > Development Tools menu > Login tab > Auth Key > Delete)

  The Auth Key menu is visible only if an authentication key was previously generated.

Returns

• Future<LoginResult>

  • provider <String>

    The provider used for the login (in this case, 'external_token')

  • token <WepinFBToken>

    • idToken <String>

      The Wepin Firebase ID token

    • refreshToken <String>

      The Wepin Firebase refresh token

Exception

• WepinError

Example

final user = await wepinLogin.loginWithAccessToken(
    provider: 'naver', 
    accessToken:'eyJHGciO....adQssw5c', 
    sign:'9753d4dc...c63466b9'
);

---

getRefreshFirebaseToken

await wepinLogin.getRefreshFirebaseToken()

Retrieves information on the current Wepin Firebase token.

Parameters

• None

Returns

• Future<LoginResult>

  • provider <String> The provider used for the login <'google'|'apple'|'naver'|'discord'|'email'|'external_token'>

  • token <WepinFBToken>

    • idToken <String> The Wepin Firebase ID token

    • refreshToken <String> The Wepin Firebase refresh token

Exception

• WepinError

Example

final user = await wepinLogin.getRefreshFirebaseToken();

---

loginFirebaseWithOauthProvider

await wepinLogin.loginFirebaseWithOauthProvider({required String provider, required String clientId})

This method combines the functionality of loginWithOauthProvider(), loginWithIdToken(), and loginWithAccessToken(). It opens an in-app browser to log in to Wepin Firebase through the specified OAuth login provider. Upon successful login, it returns Firebase login information.

This method can only be used after the authentication key has been deleted from the Wepin Workspace.

(Wepin Workspace > Development Tools menu > Login tab > Auth Key > Delete)

The Auth Key menu is visible only if an authentication key was previously generated.

Supported Version Supported from version0.0.5 and later.

Parameters

• provider <String>

  The OAuth login provider (e.g., 'google', 'naver', 'discord', 'apple')

• clientId <String>

  The client ID of the OAuth login provider

Return Value

• Future<LoginResult>

  • provider <String> The provider used for login<'google'|'apple'|'naver'|'discord'|'email'|'external_token'>

  • token <WepinFBToken>

    • idToken <String> Wepin Firebase ID token

      • refreshToken <String> Wepin Firebase refresh token

Exception

• WepinError

Example

final user = await wepinLogin.loginFirebaseWithOauthProvider(
    provider:'apple', 
    clietId:'apple-client-id'
);

loginWepinWithOauthProvider

await wepinLogin.loginWepinWithOauthProvider({required String provider, required String clientId})

This method combines the functionality of loginFirebaseWithOauthProvider() and loginWepin(). It opens an in-app browser to log in to Wepin through the specified OAuth login provider. Upon successful login, it returns Wepin user information.

This method can only be used after the authentication key has been deleted from the Wepin Workspace.

(Wepin Workspace > Development Tools menu > Login tab > Auth Key > Delete)

The Auth Key menu is visible only if an authentication key was previously generated.

Supported Version Supported from version0.0.5 and later.

Parameters

• provider <String>

  The OAuth login provider (e.g., 'google', 'naver', 'discord', 'apple')

• clientId <String>

  The client ID of the OAuth login provider

Returns

• Future<WepinUser> - A Future that resolves to a WepinUser object containing the user's login status and information.

  • status <'success'|'fail'>

    The login status.

  • userInfo <WepinUserInfo>optional - The user's information, including:

    • userId <String>

      The user's ID

    • email <String>

      The user's email

    • provider <'google'|'apple'|'naver'|'discord'|'email'|'external_token'>

      The login provider

    • use2FA <bool>

      Whether the user uses two-factor authentication

    • walletId <String>

      The user's wallet ID

  • userStatus <WepinUserStatus> -The user's Wepin login status, including:

    • loginStats <'complete' | 'pinRequired' | 'registerRequired'>

      If the user's loginStatus value is not 'complete', the user must register with Wepin.

    • pinRequired <bool>optional

      Whether a PIN is required

  • token <Token>

    The user's Wepin token

  • accessToken <String> The access token

  • refreshToken <String> The refresh token

Exception

• WepinError

Example

final userInfo = await wepinLogin.loginWepinWithOauthProvider(
  provider: 'google',
  clientId; 'google-client-id'
);

final userStatus = userInfo.userStatus;
if (userStatus.loginStatus == 'pinRequired' || userStatus.loginStatus == 'registerRequired') {
    // Wepin register
}

loginWepinWithIdToken

await wepinLogin.loginWepinWithIdToken({required String idToken, String? sign})

This method integrates the functions of loginWithIdToken() and loginWepin(). The loginWepinWithIdToken() method logs the user into Wepin using an external ID token. Upon successful login, it returns Wepin user information.

Supported Version Supported from version0.0.5 and later.

Parameters

• idToken <String> The ID token to be used for login

• sign <String>optional Signature value for the token provided as the first parameter (returned value of getSignForLogin())

If you choose to remove the authentication key issued from the Wepin Workspace, you may opt not to use the signvalue.

(Wepin Workspace > Development Tools menu > Login tab > Auth Key > Delete)

The Auth Key menu is visible only if an authentication key was previously generated.

Returns

• Future<WepinUser> - A Future that resolves to a WepinUser object containing the user's login status and information.

  • status <'success'|'fail'>

    The login status

  • userInfo <WepinUserInfo>optional - The user's information, including:

    • userId <String>

      The user's ID

    • email <String>

      The user's email

    • provider <'google'|'apple'|'naver'|'discord'|'email'|'external_token'>

      The login provider

    • use2FA <bool>

      Whether the user uses two-factor authentication

    • walletId <String>

      The user's wallet ID

  • userStatus <WepinUserStatus> -The user's Wepin login status, including:

    • loginStats <'complete' | 'pinRequired' | 'registerRequired'>

      If the user's loginStatus value is not 'complete', the user must register with Wepin.

    • pinRequired <bool>optional

      Whether a PIN is required

  • token <Token>

    The user's Wepin token

  • accessToken <String> The access token

  • refreshToken <String> The refresh token

Exception

• WepinError

Example

final userInfo = await wepinLogin.loginWepinWithIdToken(
  idToken:'eyJHGciO....adQssw5c',
);

final userStatus = userInfo.userStatus;
if (userStatus.loginStatus == 'pinRequired' || userStatus.loginStatus == 'registerRequired') {
    // Wepin register
}

loginWepinWithAccessToken

await wepinLogin.loginWepinWithAccessToken({required String provider, required String accessToken, String? sign})

This method integrates the functions of loginWithAccessToken() and loginWepin(). The loginWepinWithAccessToken() method logs the user into Wepin using an external access token. Upon successful login, it returns Wepin user information.

Supported Version Supported from version0.0.5 and later.

Parameters

• provider <"naver"|"discord">

  Provider that issued the access token

• accessToken <String>

  Access token value to be used for login

• sign <String> optional

  Signature value for the Access token (returned value of getSignForLogin())

  If you choose to remove the authentication key issued from the Wepin Workspace, you may opt not to use the signvalue.

  (Wepin Workspace > Development Tools menu > Login tab > Auth Key > Delete)

  The Auth Key menu is visible only if an authentication key was previously generated.

Returns

• Future<WepinUser> - A Future that resolves to a WepinUser object containing the user's login status and information.

  • status <'success'|'fail'>

    The login status

  • userInfo <WepinUserInfo>optional - The user's information, including:

    • userId <String>

      The user's ID

    • email <String>

      The user's email

    • provider <'google'|'apple'|'naver'|'discord'|'email'|'external_token'>

      The login provider.

    • use2FA <bool>

      Whether the user uses two-factor authentication

    • walletId <String>

      The user's wallet ID

  • userStatus <WepinUserStatus> -The user's Wepin login status, including:

    • loginStats <'complete' | 'pinRequired' | 'registerRequired'>

      If the user's loginStatus value is not 'complete', the user must register with Wepin.

    • pinRequired <bool>optional

      Whether a PIN is required

  • token <Token>

    The user's Wepin token

  • accessToken <String> The access token

  • refreshToken <String> The refresh token

Exception

• WepinError

Example

final userInfo = await wepinLogin.loginWepinWithAccessToken(
    provider: 'naver',
    accessToken:'eyJHGciO....adQssw5c',
);

final userStatus = userInfo.userStatus;
if (userStatus.loginStatus == 'pinRequired' || userStatus.loginStatus == 'registerRequired') {
    // Wepin register
}

loginWepinWithEmailAndPassword

await wepinLogin.loginWepinWithEmailAndPassword({required String email, required String password})

his method integrates the functions of loginWithEmailAndPassword() and loginWepin(). The loginWepinWithEmailAndPassword() method logs the user into Wepin using the provided email and password. Upon successful login, it returns Wepin user information.

Supported Version Supported from version0.0.5 and later.

Parameters

• email <String> User email.

• password <String> User password.

Returns

• Future<WepinUser> - A Future that resolves to a WepinUser object containing the user's login status and information.

  • status <'success'|'fail'>

    The login status

  • userInfo <WepinUserInfo>optional - The user's information, including:

    • userId <String>

      The user's ID

    • email <String>

      The user's email

    • provider <'google'|'apple'|'naver'|'discord'|'email'|'external_token'>

      The login provider

    • use2FA <bool>

      Whether the user uses two-factor authentication.

    • walletId <String>

      The user's wallet ID

  • userStatus <WepinUserStatus> -The user's Wepin login status, including:

    • loginStats <'complete' | 'pinRequired' | 'registerRequired'>

      If the user's loginStatus value is not 'complete', the user must register with Wepin

    • pinRequired <bool>optional

      Whether a PIN is required

  • token <Token>

    The user's Wepin token

  • accessToken <String> The access token

  • refreshToken <String> The refresh token

Exception

• WepinError

Example

final userInfo = await wepinLogin.loginWithEmailAndPassword(
    email: "[e-mail]",
    password: "user_password"
);

final userStatus = userInfo.userStatus;
if (userStatus.loginStatus == 'pinRequired' || userStatus.loginStatus == 'registerRequired') {
    // Wepin register
}

loginWepin

await wepinLogin.loginWepin(LoginResult params)

Logs the user into Wepin using the Wepin Firebase token.

Parameters

• params <LoginResult> Parameters from the return value of methods like loginWithEmailAndPassword(), loginWithIdToken(), or loginWithAccessToken().

Returns

• Future<WepinUser> - A Future that resolves to a WepinUser object containing the user's login status and information.

  • status <'success'|'fail'>

    The login status.

  • userInfo <WepinUserInfo>optional - The user's information, including:

    • userId <String>

      The user's ID

    • email <String>

      The user's email

    • provider <'google'|'apple'|'naver'|'discord'|'email'|'external_token'>

      The login provider

    • use2FA <bool>

      Whether the user uses two-factor authentication

    • walletId <String>

      The user's wallet ID

  • userStatus <WepinUserStatus> -The user's Wepin login status, including:

    • loginStats <'complete' | 'pinRequired' | 'registerRequired'>

      If the user's loginStatus value is not 'complete', the user must register with Wepin.

    • pinRequired <bool>optional

      Whether a PIN is required

  • token <Token>

    The user's Wepin token

  • accessToken <String> The access token

  • refreshToken <String> The refresh token

Exception

• WepinError

Example

final wepinLogin = WepinLogin(appId: 'appId', appKey: 'appKey');
await wepinLogin.init();
final res = await wepinLogin.loginWithOauthProvider(
    provider: "google",
    clientId: "your-google-client-id"
);

final sign = wepinLogin?.getSignForLogin(privateKey: privateKey, message: res!.token);
LoginResult? resLogin;
if(provider == 'naver' || provider == 'discord') {
  resLogin = await wepinLogin.loginWithAccessToken(provider: provider, accessToken: res!.token, sign: sign));
} else {
  resLogin = await wepinLogin.loginWithIdToken(idToken: res!.token, sign: sign));
}

final userInfo = await wepinLogin.loginWepin(resLogin);
final userStatus = userInfo.userStatus;
if (userStatus.loginStatus == 'pinRequired' || userStatus.loginStatus == 'registerRequired') {
    // Wepin register
}

---

getCurrentWepinUser

await wepinLogin.getCurrentWepinUser()

Retrieves information about the currently logged-in user in Wepin.

Parameters

• None

Returns

• Future<WepinUser> - A Future that resolves to a WepinUser object containing the user's login status and information.

  • status <'success'|'fail'>

    The login status.

  • userInfo <WepinUserInfo>optional - The user's information, including:

    • userId <String>

      The user's ID

    • email <String>

      The user's email

    • provider <'google'|'apple'|'naver'|'discord'|'email'|'external_token'>

      The login provider

    • use2FA <bool>

      Whether the user uses two-factor authentication

    • walletId <String>

      The user's wallet ID

  • userStatus <WepinUserStatus> -The user's Wepin login status, including:

    • loginStats <'complete' | 'pinRequired' | 'registerRequired'>

      If the user's loginStatus value is not 'complete', the user must register with Wepin

    • pinRequired <bool>optional

      Whether a PIN is required

  • token <Token>

    The user's Wepin token

  • accessToken <String> The access token

  • refreshToken <String> The refresh token

Exception

• WepinError

Example

final userInfo = await wepinLogin.getCurrentWepinUser();
final userStatus = userInfo.userStatus;
if (userStatus.loginStatus == 'pinRequired' || userStatus.loginStatus == 'registerRequired') {
    // Wepin register
}

---

logout

await wepinLogin.logout()

Logs out the currently logged-in user from Wepin.

Parameters

• None

Returns

• Future<bool>

Exception

• WepinError

Example

final result = await wepinLogin.logout();
if (result) {
  // Successfully logged out
}

---

getSignForLogin

Generates a signature for verifying the issuer. This method is mainly used to generate signatures for login-related information such as ID tokens and access tokens.

final result = getSignForLogin({required String privateKey, required String message});

Parameters

• privateKey <String>

  The authentication key used for signature generation.

• message <String> The message or payload to be signed.

The key for signing can be obtained from Wepin Workspace. In the Development Tools menu, click Get your authentication key on the Login tab to retrieve the authentication key.

Returns

• <String> The generated signature.

The private key (privateKey) must be securely stored and should not be exposed externally. To enhance security and protect sensitive information, it is recommended to execute the getSignForLogin() method on the backend rather than the frontend. For details on how to generate signatures, please refer to the following document:

• Signature Generation Methods

Example

final sign = getSignForLogin(
  privateKey: '0400112233445566778899001122334455667788990011223344556677889900', 
  message: 'idtokenabcdef'
);

final res = await wepinLogin.loginWithIdToken(
    idToken: 'eyJHGciO....adQssw5c', 
    sign: sign
);

---

finalize

await wepinLogin.finalize()

Terminates the Wepin Login Library.

Parameters

• None

Returns

• Future<void> A Future that resolves when the finalization process is complete.

Example

await wepinLogin.finalize();

WepinError

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.