support for extra reasons of registration failure

src/commonMain/kotlin/net.sergeych.superlogin/api.kt

@@ -19,14 +19,19 @@ data class RegistrationArgs(
     val packedACO: ByteArray,
     val extraData: ByteArray? = null
 ) {
+    @Suppress("unused")
+
     inline fun <reified T>toSuccess(loginToken: ByteArray, extraData: T): AuthenticationResult.Success {
         return AuthenticationResult.Success(
             loginName, loginToken, BossEncoder.encode(extraData)
         )
     }
 
-    inline fun <reified T>decodeOrNull(): T? = extraData?.let { it.decodeBoss<T>() }
-    inline fun <reified T: Any>decodeOrThrow(): T = extraData?.let { it.decodeBoss<T>() }
+    @Suppress("unused")
+    inline fun <reified T>decodeOrNull(): T? = extraData?.decodeBoss<T>()
+
+    @Suppress("unused")
+    inline fun <reified T: Any>decodeOrThrow(): T = extraData?.decodeBoss<T>()
         ?: throw IllegalArgumentException("missing require extra data of type ${T::class.simpleName}")
 }
 
@@ -44,6 +49,11 @@ sealed class AuthenticationResult {
     @SerialName("LoginUnavailable")
     object LoginUnavailable: AuthenticationResult()
 
+    @Serializable
+    @SerialName("OtherError")
+    class OtherError(val reason: String,val packedData: ByteArray?=null): AuthenticationResult()
+
+
     @Serializable
     @SerialName("LoginIdUnavailable")
     object LoginIdUnavailable: AuthenticationResult()

src/commonMain/kotlin/net.sergeych.superlogin/client/Registration.kt

@@ -34,6 +34,7 @@ class Registration(
     val pbkdfRounds: Int = 15000,
 ) : LogTag("SLREG") {
 
+    @Suppress("unused")
     sealed class Result {
         /**
          * Login is already in use or is somehow else invalid
@@ -53,6 +54,8 @@ class Registration(
             val encodedData: ByteArray?) : Result() {
                 inline fun <reified D>data() = encodedData?.let { BossDecoder.decodeFrom<D>(it)}
             }
+
+        class OtherError(val code: String,val packedData: ByteArray?=null): Result()
     }
 
     private var lastPasswordHash: ByteArray? = null
@@ -90,7 +93,7 @@ class Registration(
         val nonce = adapter.invokeCommand(api.slGetNonce)
         val loginPrivateKey = deferredLoginKey.await()
         val spl = SuperloginRestoreAccessPayload(login, loginPrivateKey, dataKey)
-        repeat(10) {
+        repeat(3) {
             val (restoreKey, restoreData) = AccessControlObject.pack(passwordKeys!!.loginAccessKey, spl)
             try {
                 val packedArgs = SignedRecord.pack(
@@ -122,6 +125,8 @@ class Registration(
 
                     AuthenticationResult.LoginUnavailable -> return Result.InvalidLogin
 
+                    is AuthenticationResult.OtherError -> return Result.OtherError(result.reason, result.packedData)
+
                     is AuthenticationResult.Success -> {
                         return Result.Success(
                             restoreKey.secret,