verify method
Verifies the HOTP value passed in against the a given counter.
All parameters are mandatory.
HOTP hotp = HOTP(secret: 'BASE32ENCODEDSECRET');
hotp.at(counter: 0); // => 432143
// Verify for current time
hotp.verify(otp: 432143, counter: 0); // => true
// Verify after 30s
hotp.verify(otp: 432143, counter: 10); // => false
Implementation
bool verify({String? otp, int? counter}) {
if (otp == null || counter == null) {
return false;
}
String? otpCount = this.at(counter: counter);
return otp == otpCount;
}