craftbukkit/nms-patches/net/minecraft/world/level/block/BlockRedstoneTorch.patch

--- a/net/minecraft/world/level/block/BlockRedstoneTorch.java
+++ b/net/minecraft/world/level/block/BlockRedstoneTorch.java
@@ -22,6 +22,8 @@
 import net.minecraft.world.level.redstone.ExperimentalRedstoneUtils;
 import net.minecraft.world.level.redstone.Orientation;
 
+import org.bukkit.event.block.BlockRedstoneEvent; // CraftBukkit
+
 public class BlockRedstoneTorch extends BaseTorchBlock {
 
     public static final MapCodec<BlockRedstoneTorch> CODEC = simpleCodec(BlockRedstoneTorch::new);
@@ -85,8 +87,24 @@
             list.remove(0);
         }
 
+        // CraftBukkit start
+        org.bukkit.plugin.PluginManager manager = worldserver.getCraftServer().getPluginManager();
+        org.bukkit.block.Block block = worldserver.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+        int oldCurrent = ((Boolean) iblockdata.getValue(BlockRedstoneTorch.LIT)).booleanValue() ? 15 : 0;
+
+        BlockRedstoneEvent event = new BlockRedstoneEvent(block, oldCurrent, oldCurrent);
+        // CraftBukkit end
         if ((Boolean) iblockdata.getValue(BlockRedstoneTorch.LIT)) {
             if (flag) {
+                // CraftBukkit start
+                if (oldCurrent != 0) {
+                    event.setNewCurrent(0);
+                    manager.callEvent(event);
+                    if (event.getNewCurrent() != 0) {
+                        return;
+                    }
+                }
+                // CraftBukkit end
                 worldserver.setBlock(blockposition, (IBlockData) iblockdata.setValue(BlockRedstoneTorch.LIT, false), 3);
                 if (isToggledTooFrequently(worldserver, blockposition, true)) {
                     worldserver.levelEvent(1502, blockposition, 0);
@@ -94,6 +112,15 @@
                 }
             }
         } else if (!flag && !isToggledTooFrequently(worldserver, blockposition, false)) {
+            // CraftBukkit start
+            if (oldCurrent != 15) {
+                event.setNewCurrent(15);
+                manager.callEvent(event);
+                if (event.getNewCurrent() != 15) {
+                    return;
+                }
+            }
+            // CraftBukkit end
             worldserver.setBlock(blockposition, (IBlockData) iblockdata.setValue(BlockRedstoneTorch.LIT, true), 3);
         }