public function setupWebhook($url, $identifier = null) {
        $identifier = $identifier ?: "WALLET-{$this->identifier}";
        return $this->sdk->setupWalletWebhook($this->identifier, $identifier, $url);
    }
public function setupWebhook($url, $identifier = null) {
        $identifier = $identifier ?: "WALLET-{$this->identifier}";
        return $this->sdk->setupWalletWebhook($this->identifier, $identifier, $url);
    }
public function setupWebhook ( $ url , $ identifier = null ) { $ identifier = $ identifier ? : "WALLET-{$this->identifier}" ; return $ this -> sdk -> setupWalletWebhook ( $ this -> identifier , $ identifier , $ url ) ; }
setup a webhook for our wallet

@param string    $url            URL to receive webhook events
@param string    $identifier     identifier for the webhook, defaults to WALLET-{$this->identifier}
@return array
setup a webhook for our wallet