Verify API is a security-focused feature that allows wallets to notify end-users when they may be connecting to a suspicious or malicious domain, helping to prevent phishing attacks across the industry. Once a wallet knows whether an end-user is on uniswap.com or eviluniswap.com, it can help them to detect potentially harmful connections through Verify’s combined offering of Reown’s domain registry. For those looking to enable Verify on the app side, check out our reference guide here. When a user initiates a connection with an application, Verify API enables wallets to present their users with four key states that can help them determine whether the domain they’re about to connect to might be malicious. These are:

Verify Banner

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Disclaimer

Verify API is not designed to be bulletproof but to make the impersonation attack harder and require a somewhat sophisticated attacker. We are working on a new standard with various partners to close those gaps and make it bulletproof.

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Domain risk detection

The Verify security system will discriminate session proposals & session requests with distinct validations that can be either VALID, INVALID or UNKNOWN.
  • Domain match: The domain linked to this request has been verified as this application’s domain.
    • This interface appears when the domain a user is attempting to connect to has been ‘verified’ in our domain registry as the registered domain of the application the user is trying to connect to, and the domain has not returned as suspicious from either of the security tools we work with. The verifyContext included in the request will have a validation of VALID.
  • Unverified: The domain sending the request cannot be verified.
    • This interface appears when the domain a user is attempting to connect to has not been verified in our domain registry, but the domain has not returned as suspicious from either of the security tools we work with. The verifyContext included in the request will have a validation of UNKNOWN.
  • Mismatch: The application’s domain doesn’t match the sender of this request.
    • This interface appears when the domain a user is attempting to connect to has been flagged as a different domain to the one this application has verified in our domain registry, but the domain has not returned as suspicious from either of the security tools we work with. The verifyContext included in the request will have a validation of INVALID
  • Threat: This domain is flagged as malicious and potentially harmful.
    • This interface appears when the domain a user is attempting to connect to has been flagged as malicious on one or more of the security tools we work with. The verifyContext included in the request will contain parameter isScam with value true.

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Implementation

To check the Verify API validations and whether or not your user is interacting with potentially malicious dapp, you can do so by accessing the verifyContext included in the SessionProposalEvent: 
_walletKit!.onSessionProposal.subscribe((SessionProposalEvent? args) {
  if (args != null) {
    final scamApp = args.verifyContext?.validation.scam;
    final invalidApp = args.verifyContext?.validation.invalid;
    final validApp = args.verifyContext?.validation.valid;
    final unknown = args.verifyContext?.validation.unknown;
  }
});