Anti-Sybil SDK - A rapid and privacy-preserving solution to combat bot and sybil attacks by using the RedirectURL as the src-attribute value for the iFrame.
When you need to protect a website or application from automated attacks, you can use anti-bot mechanisms. These attacks can result in malicious behavior, such as spamming, data theft, or network disruption. Anti-bot technology is designed to identify and block these attacks to ensure that only real human users can access your website or application.
In this case, users are required to undergo facial liveliness detection to prove that they are real human users. This detection requires users to perform specific actions or expressions in front of a camera to prove that they are genuine humans and not automated programs. This technology can help prevent automated attacks and fraud, and increase the security and reliability of your website or application.
zkMe-Widget MeID Process
Step 1: Enter the service authorization Widget page; the user confirms and goes to the next step
Step 4: Based on the outcomes of the initiated query, a determination is made regarding whether to commence the authentication process for the specified user.
Interaction Instructions
Integration via NPM
Installation
pnpm add @zkmelabs/widget
# or
yarn add @zkmelabs/widget
# or
npm install @zkmelabs/widget
Getting Started
Step 1. Import styles
import '@zkmelabs/widget/dist/style.css'
Step 2. Create a new ZkMeWidget instance
import { ZkMeWidget, type Provider } from '@zkmelabs/widget'
const provider: Provider = {
async getAccessToken() {
// -------------------------TODO-------------------------
// Request a new token from your backend service and return it to the widget.
// For the access token, see docs.zk.me/zkme-dochub/verify-with-zkme-protocol/integration-guide/javascript-sdk/meid-anti-sybil-suite#how-to-generate-an-access-token-with-api_key
// ------------------------------------------------------
return fetchNewToken()
},
async getUserAccounts() {
// -------------------------TODO-------------------------
// If your project is a Dapp,
// you need to return the user's connected wallet address.
const userConnectedAddress = await connect()
return [userConnectedAddress]
// If not,
// you should return the user's e-mail address, phone number or any other unique identifier.
//
// return ['email address']
// or
// return ['phone number']
// or
// return ['unique identifier']
// ------------------------------------------------------
},
}
const zkMeWidget = new ZkMeWidget(
// -------------------------TODO-------------------------
appId, // This parameter means the same thing as "mchNo"
'YourDappName',
chainId,
provider,
{
lv: 'MeID'
// For other options, please refer to the table below
}
// ------------------------------------------------------
)
import { ZkMeWidget, type Provider } from '@zkmelabs/widget'
const provider: Provider = {
async getAccessToken() {
// -------------------------TODO-------------------------
// Request a new token from your backend service and return it to the widget.
// For the access token, see docs.zk.me/zkme-dochub/meid-anti-bot-suite/meid-integration-guide/sdk-integration#how-to-generate-an-access-token-with-api_key
// ------------------------------------------------------
return fetchNewToken()
},
async getUserAccounts() {
// If your project is a Dapp,
// you need to return the user's connected wallet address.
const userConnectedAddress = await connect()
return [userConnectedAddress]
},
}
const zkMeWidget = new ZkMeWidget(
// -------------------------TODO-------------------------
appId, // This parameter means the same thing as "mchNo"
'YourDappName',
chainId,
provider,
{
lv: 'MeID',
mode: 'wallet',
// Whether to verify the validity of the user's wallet. Default is false.
// If set to true, you need to implement the provider.signMessage method.
checkAddress: true
// For other options, please refer to the table below
}
// ------------------------------------------------------
)
NOTE: The specific configuration for the "option" parameter is shown in the table below
Param
Type
Description
options.theme
Theme?
"auto", "light" or "dark", default "auto".
options.locale
Language?
"en" or "zh-hk", default "en".
Step 3. Listen to the meidFinished widget event to detect when the user has completed the MeID process
function handleFinished(results) {
const { isGrant, associatedAccount } = results
if (
isGrant &&
associatedAccount === userConnectedAddress.toLowerCase()
) {
// Prompts the user that MeID verification has been completed
}
}
zkMeWidget.on('meidFinished', handleFinished)
Step 4. Launch the zkMe widget and it will be displayed in the center of your webpage
// This is the code to launch our widget on your page
button.addEventListener('click', () => {
zkMeWidget.launch()
})
Helper functions
verifyMeidWithZkMeServices()
Before launching the widget, you should check the MeID status of the user and launch the widget when the check result is false.
import { verifyMeidWithZkMeServices } from '@zkmelabs/widget'
// MeID
const { isGrant } = await verifyMeidWithZkMeServices(
appId,
userAccount
)
Param
Type
Description
appId
string
This parameter means the same thing as "mchNo"
userAccount
string
The userAccount info (such as wallet address, email, phone number, or unique identifier) must match the format of accounts returned by provider.getUserAccounts.
How to Generate an Access Token with API_KEY
To use your API_KEY to obtain an accessToken, you will need to make a specific HTTP request. Here's how you can do it:
a. Endpoint: Send a POST request to the token exchange endpoint.
POST https://nest-api.zk.me/api/token/get
Please remember to modify the Content-Type in the request header to application/json. Failing to do so might result in a Parameter Error response.
b. Request Body:
Parameter Name
Required
Type
Desc
apiKey
True
string
The API_KEY provided by zkMe.
appId
True
string
A unique identifier (mchNo) to DApp provided by zkMe.
