Using the Headless SDK, requests can be easily customized to set a specific expiry, adjust the OTP length, and select a preferred delivery channel such as WhatsApp, SMS, or Viber for phone number authentication.

After successfully integrating OTPLESS Flutter headless SDK, you can set the following custom parameters:

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Custom Expiry

Headless request can be customized with custom expiry.

Map<String, dynamic> arg = {};
arg["phone"] = phoneNumber;
arg["countryCode"] = countryCode;
// Set expiry in seconds
arg["expiry"] = expiry;
_otplessFlutterPlugin.startHeadless(onHeadlessResult, arg);

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Custom OTP length

Headless request can be customized with custom OTP length 4 or 6.

Map<String, dynamic> arg = {};
arg["phone"] = phoneNumber;
arg["countryCode"] = countryCode;
// Either 4 or 6
arg["otpLength"] = otpLength;
_otplessFlutterPlugin.startHeadless(onHeadlessResult, arg);

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Custom Delivery Channel

Headless request can be customized with custom Delivery Channel like WHATSAPP, SMS and VIBER.

Map<String, dynamic> arg = {};
arg["phone"] = phoneNumber;
arg["countryCode"] = countryCode;
// WHATSAPP,SMS and VIBER
arg["deliveryChannel"] = deliveryChannel;
_otplessFlutterPlugin.startHeadless(onHeadlessResult, arg);

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