Merge pull request #1428 from ManInMyVan/Post2

fix post exempting all ENTITY_ACTION packets for 1.8c -> 1.9s

src/main/java/ac/grim/grimac/checks/impl/post/PostCheck.java

@@ -14,6 +14,7 @@
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.packettype.PacketTypeCommon;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerEntityAnimation;
 
@@ -99,8 +100,7 @@ public void onPacketReceive(final PacketReceiveEvent event) {
                     && isExemptFromSwingingCheck < player.lastTransactionReceived.get()) { // Exempt when the server sends animations because viaversion
                 if (sentFlying) post.add(event.getPacketType());
             } else if (ENTITY_ACTION.equals(packetType) // ViaRewind sends START_FALL_FLYING packets async for 1.8 clients on 1.9+ servers
-                    && ((player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9) // ViaRewind doesn't 1.9 players
-                    || PacketEvents.getAPI().getServerManager().getVersion().isOlderThanOrEquals(ServerVersion.V_1_8_8)))) { // No elytras
+                    && (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9) || new WrapperPlayClientEntityAction(event).getAction() != WrapperPlayClientEntityAction.Action.START_FLYING_WITH_ELYTRA)) {
                 // https://github.com/GrimAnticheat/Grim/issues/824
                 if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_19_3) && player.compensatedEntities.getSelf().getRiding() != null) {
                     return;