From 356b49dba910cc7c14cca8f67a7a6b87a81d949f Mon Sep 17 00:00:00 2001
From: KotlinGeekDev <kotlingeek@protonmail.com>
Date: Fri, 26 Dec 2025 16:17:58 +0100
Subject: [PATCH] Foundations(iOS Sourceset): Implement functions(some, basic)
 for EventHasherSerializer.

---
 .../crypto/EventHasherSerializer.ios.kt       | 40 +++++++++++++++++--
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/quartz/src/iosMain/kotlin/com/vitorpamplona/quartz/nip01Core/crypto/EventHasherSerializer.ios.kt b/quartz/src/iosMain/kotlin/com/vitorpamplona/quartz/nip01Core/crypto/EventHasherSerializer.ios.kt
index 4d5ef4a56..85e5f2184 100644
--- a/quartz/src/iosMain/kotlin/com/vitorpamplona/quartz/nip01Core/crypto/EventHasherSerializer.ios.kt
+++ b/quartz/src/iosMain/kotlin/com/vitorpamplona/quartz/nip01Core/crypto/EventHasherSerializer.ios.kt
@@ -21,8 +21,38 @@
 package com.vitorpamplona.quartz.nip01Core.crypto
 
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.fastForEach
+import com.vitorpamplona.quartz.utils.Hex
+import com.vitorpamplona.quartz.utils.sha256.sha256
+import kotlinx.serialization.json.JsonArray
+import kotlinx.serialization.json.add
+import kotlinx.serialization.json.addJsonArray
+import kotlinx.serialization.json.buildJsonArray
 
 actual object EventHasherSerializer {
+
+    fun makeJsonObjectForId(
+        pubKey: HexKey,
+        createdAt: Long,
+        kind: Int,
+        tags: Array<Array<String>>,
+        content: String,
+    ): JsonArray {
+        val arrayBuilder = buildJsonArray {
+            add(0)
+            add(pubKey)
+            add(createdAt)
+            add(kind)
+            addJsonArray {
+                tags.fastForEach { tag ->
+                    //add(JsonArray(content = tag.map { JsonPrimitive(it) }))
+                    addJsonArray { tag.fastForEach { add(it) } }
+                }
+            }
+            add(content)
+        }
+        return arrayBuilder
+    }
     actual fun makeJsonForId(
         pubKey: HexKey,
         createdAt: Long,
@@ -30,7 +60,7 @@ actual object EventHasherSerializer {
         tags: Array<Array<String>>,
         content: String,
     ): String {
-        TODO("Not yet implemented")
+        return makeJsonObjectForId(pubKey, createdAt, kind, tags,content).toString()
     }
 
     actual fun fastMakeJsonForId(
@@ -40,7 +70,8 @@ actual object EventHasherSerializer {
         tags: Array<Array<String>>,
         content: String,
     ): ByteArray {
-        TODO("Not yet implemented")
+        // Also use makeJsonObjectForId(...) above. May change this if needed(for performance).
+        return makeJsonObjectForId(pubKey, createdAt, kind, tags,content).toString().encodeToByteArray()
     }
 
     actual fun makeJsonForIdHashAndCheck(
@@ -51,6 +82,9 @@ actual object EventHasherSerializer {
         tags: Array<Array<String>>,
         content: String,
     ): Boolean {
-        TODO("Not yet implemented")
+
+        // Also use makeJsonObjectForId(...) above. May change byteArray encode method if needed.
+        val eventIdHash = sha256(makeJsonObjectForId(pubKey, createdAt, kind, tags, content).toString().encodeToByteArray())
+        return Hex.isEqual(id, eventIdHash)
     }
 }