From c67dfd297509700073b81b02d333c6dfd563c8af Mon Sep 17 00:00:00 2001
From: Naomi Plasterer <naomi@xmtp.com>
Date: Tue, 5 Mar 2024 18:35:33 -0700
Subject: [PATCH] derive the hmac key correctl (#194)

---
 .../src/main/java/org/xmtp/android/library/Conversations.kt    | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/library/src/main/java/org/xmtp/android/library/Conversations.kt b/library/src/main/java/org/xmtp/android/library/Conversations.kt
index 535efe0fd..b60f2b1ca 100644
--- a/library/src/main/java/org/xmtp/android/library/Conversations.kt
+++ b/library/src/main/java/org/xmtp/android/library/Conversations.kt
@@ -324,8 +324,9 @@ data class Conversations(
                 (thirtyDayPeriodsSinceEpoch - 1..thirtyDayPeriodsSinceEpoch + 1).forEach { value ->
                     val info = "$value-${client.address}"
                     val hmacKey =
-                        Crypto.calculateMac(
+                        Crypto.deriveKey(
                             conversation.keyMaterial!!,
+                            ByteArray(0),
                             info.toByteStringUtf8().toByteArray()
                         )
                     val hmacKeyData = HmacKeyData.newBuilder()