Creates a kind type alias

quartz/src/main/java/com/vitorpamplona/quartz/nip01Core/core/Event.kt

@@ -34,7 +34,7 @@ open class Event(
     val id: HexKey,
     val pubKey: HexKey,
     val createdAt: Long,
-    val kind: Int,
+    val kind: Kind,
     val tags: TagArray,
     val content: String,
     val sig: HexKey,

quartz/src/main/java/com/vitorpamplona/quartz/nip01Core/core/Kind.kt

@@ -0,0 +1,32 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.quartz.nip01Core.core
+
+import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
+import com.vitorpamplona.quartz.nip02FollowList.ContactListEvent
+
+typealias Kind = Int
+
+fun Kind.isEphemeral() = this >= 20_000 && this < 30_000
+
+fun Kind.isReplaceable() = this == MetadataEvent.KIND || this == ContactListEvent.KIND || (this >= 10_000 && this < 20_000)
+
+fun Kind.isAddressable() = this >= 30_000 && this < 40_000

quartz/src/main/java/com/vitorpamplona/quartz/nip01Core/tags/addressables/Address.kt

@@ -22,6 +22,7 @@ package com.vitorpamplona.quartz.nip01Core.tags.addressables
 
 import android.util.Log
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.Kind
 import com.vitorpamplona.quartz.nip19Bech32.Nip19Parser
 import com.vitorpamplona.quartz.nip19Bech32.entities.NAddress
 import com.vitorpamplona.quartz.utils.Hex
@@ -29,7 +30,7 @@ import com.vitorpamplona.quartz.utils.bytesUsedInMemory
 import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 data class Address(
-    val kind: Int,
+    val kind: Kind,
     val pubKeyHex: HexKey,
     val dTag: String = "",
 ) : Comparable<Address> {