From d4fd2467d691a69a0ba75348086424b9fb33a297 Mon Sep 17 00:00:00 2001
From: bndw <ben@bdw.to>
Date: Sat, 7 Feb 2026 15:20:57 -0800
Subject: wip

---
 kinds.go | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 kinds.go

(limited to 'kinds.go')

diff --git a/kinds.go b/kinds.go
new file mode 100644
index 0000000..cb76e88
--- /dev/null
+++ b/kinds.go
@@ -0,0 +1,51 @@
+package nostr
+
+// Event kind constants as defined in NIP-01 and related NIPs.
+const (
+	KindMetadata    = 0
+	KindTextNote    = 1
+	KindContactList = 3
+	KindEncryptedDM = 4
+	KindDeletion    = 5
+	KindRepost      = 6
+	KindReaction    = 7
+)
+
+// IsRegular returns true if the kind is a regular event (stored, not replaced).
+// Regular events: 1000 <= kind < 10000 or kind in {0,1,2,...} except replaceable ones.
+func IsRegular(kind int) bool {
+	if kind == KindMetadata || kind == KindContactList {
+		return false
+	}
+	if kind >= 10000 && kind < 20000 {
+		return false // replaceable
+	}
+	if kind >= 20000 && kind < 30000 {
+		return false // ephemeral
+	}
+	if kind >= 30000 && kind < 40000 {
+		return false // addressable
+	}
+	return true
+}
+
+// IsReplaceable returns true if the kind is replaceable (NIP-01).
+// Replaceable events: 10000 <= kind < 20000, or kind 0 (metadata) or kind 3 (contact list).
+func IsReplaceable(kind int) bool {
+	if kind == KindMetadata || kind == KindContactList {
+		return true
+	}
+	return kind >= 10000 && kind < 20000
+}
+
+// IsEphemeral returns true if the kind is ephemeral (not stored).
+// Ephemeral events: 20000 <= kind < 30000.
+func IsEphemeral(kind int) bool {
+	return kind >= 20000 && kind < 30000
+}
+
+// IsAddressable returns true if the kind is addressable (parameterized replaceable).
+// Addressable events: 30000 <= kind < 40000.
+func IsAddressable(kind int) bool {
+	return kind >= 30000 && kind < 40000
+}
-- 
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