src/WebhooksService/WebhooksService.php
public static function verifyPayload($token, $payload, $intuitHeaderSignature)
    {
        $verifier = new TokenVerifier($token);
        return $verifier->verifyPayLoad($payload, $intuitHeaderSignature);
    }
public static function verifyPayload($token, $payload, $intuitHeaderSignature)
    {
        $verifier = new TokenVerifier($token);
        return $verifier->verifyPayLoad($payload, $intuitHeaderSignature);
    }
use Token to verifier the payload is sent from Intuit

@param $token
The webhook Token get from Intuit
@param $payload
The payload for the webhook events
@param $intuitHeaderSignature
The header signature
@return bool
True if it is valid; otherwise return false;