replaceable-events (#1)

utils.ts

@@ -67,3 +67,35 @@ export async function getCCNPrivateKey(): Promise<Uint8Array> {
   );
   return decryptUint8Array(decodeBase64(encryptedPrivateKey), encryptionKey);
 }
+
+export function isReplaceableEvent(kind: number): boolean {
+  return (kind >= 10000 && kind < 20000) || kind === 0 || kind === 3;
+}
+
+export function isAddressableEvent(kind: number): boolean {
+  return kind >= 30000 && kind < 40000;
+}
+
+export function isRegularEvent(kind: number): boolean {
+  return (kind >= 1000 && kind < 10000) ||
+    (kind >= 4 && kind < 45) ||
+    kind === 1 ||
+    kind === 2;
+}
+
+export function isCCNReplaceableEvent(kind: number): boolean {
+  return (kind >= 60000 && kind < 65536) || kind === 0;
+}
+
+export function parseATagQuery(
+  aTagValue: string,
+): { kind: number; pubkey: string; dTag?: string } {
+  const parts = aTagValue.split(":");
+  if (parts.length < 2) return { kind: 0, pubkey: "" };
+
+  return {
+    kind: Number.parseInt(parts[0], 10),
+    pubkey: parts[1],
+    dTag: parts.length > 2 ? parts[2] : undefined,
+  };
+}