minor refactor

src/commonMain/kotlin/com/infendro/otp/HOTP.kt

@@ -14,10 +14,6 @@ class HOTP(
 ) {
     private val hmac = HMAC(function)
 
-    fun verify(secret: ByteArray, counter: Long, otp: String): Boolean {
-        return generate(secret, counter) == otp
-    }
-
     fun generate(secret: ByteArray, counter: Long): String {
         require(counter >= 0)
         return otp(secret, counter)
@@ -29,4 +25,8 @@ class HOTP(
         val otp = (hash.toInt(offset) and 0x7FFFFFFF) % 10.pow(length)
         return "$otp".padStart(length, '0')
     }
+
+    fun verify(secret: ByteArray, counter: Long, otp: String): Boolean {
+        return generate(secret, counter) == otp
+    }
 }

src/commonMain/kotlin/com/infendro/otp/TOTP.kt

@@ -13,10 +13,6 @@ class TOTP(
 ) {
     private val hotp = HOTP(function, length)
 
-    fun verify(secret: ByteArray, instant: Instant, otp: String): Boolean {
-        return generate(secret, instant) == otp
-    }
-
     fun generate(secret: ByteArray, instant: Instant): String {
         return hotp.generate(secret, counter(instant))
     }
@@ -26,4 +22,8 @@ class TOTP(
         val d = period.inWholeMilliseconds
         return ms / d
     }
+
+    fun verify(secret: ByteArray, instant: Instant, otp: String): Boolean {
+        return generate(secret, instant) == otp
+    }
 }