resolved all todos (untested though oof)

src/main/java/de/ellpeck/prettypipes/misc/ItemTerminalWidget.java

@@ -78,6 +78,6 @@ public class ItemTerminalWidget extends AbstractWidget {
 
     @Override
     public void updateNarration(NarrationElementOutput output) {
-        // TODO narration
+        this.defaultButtonNarrationText(output);
     }
 }

src/main/java/de/ellpeck/prettypipes/pipe/PipeBlock.java

@@ -20,6 +20,8 @@ import net.minecraft.world.level.Level;
 import net.minecraft.world.level.LevelAccessor;
 import net.minecraft.world.level.block.*;
 import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntityTicker;
+import net.minecraft.world.level.block.entity.BlockEntityType;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.block.state.StateDefinition;
 import net.minecraft.world.level.block.state.properties.BlockStateProperties;
@@ -297,6 +299,12 @@ public class PipeBlock extends BaseEntityBlock {
         return RenderShape.MODEL;
     }
 
+    @org.jetbrains.annotations.Nullable
+    @Override
+    public <T extends BlockEntity> BlockEntityTicker<T> getTicker(Level level, BlockState state, BlockEntityType<T> type) {
+        return createTickerHelper(type, Registry.pipeBlockEntity, PipeBlockEntity::tick);
+    }
+
     public static void dropItems(Level worldIn, BlockPos pos, Player player) {
         var tile = Utility.getBlockEntity(PipeBlockEntity.class, worldIn, pos);
         if (tile != null) {

src/main/java/de/ellpeck/prettypipes/pipe/PipeBlockEntity.java

@@ -28,6 +28,7 @@ import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
@@ -143,52 +144,6 @@ public class PipeBlockEntity extends BlockEntity implements MenuProvider, IPipeC
         this.load(pkt.getTag());
     }
 
-    // TODO tick
-  /*  @Override
-    public void tick() {
-        // invalidate our pressurizer reference if it was removed
-        if (this.pressurizer != null && this.pressurizer.isRemoved())
-            this.pressurizer = null;
-
-        if (!this.world.isAreaLoaded(this.pos, 1))
-            return;
-        IProfiler profiler = this.world.getProfiler();
-
-        if (!this.world.isRemote) {
-            // drop modules here to give a bit of time for blocks to update (iron -> gold chest etc.)
-            if (this.moduleDropCheck > 0) {
-                this.moduleDropCheck--;
-                if (this.moduleDropCheck <= 0 && !this.canHaveModules())
-                    Utility.dropInventory(this, this.modules);
-            }
-
-            profiler.startSection("ticking_modules");
-            var prio = 0;
-            var modules = this.streamModules().iterator();
-            while (modules.hasNext()) {
-                var module = modules.next();
-                module.getRight().tick(module.getLeft(), this);
-                prio += module.getRight().getPriority(module.getLeft(), this);
-            }
-            if (prio != this.priority) {
-                this.priority = prio;
-                // clear the cache so that it's reevaluated based on priority
-                PipeNetwork.get(this.world).clearDestinationCache(this.pos);
-            }
-            profiler.endSection();
-        }
-
-        profiler.startSection("ticking_items");
-        var items = this.getItems();
-        for (var i = items.size() - 1; i >= 0; i--)
-            items.get(i).updateInPipe(this);
-        if (items.size() != this.lastItemAmount) {
-            this.lastItemAmount = items.size();
-            this.world.updateComparatorOutputLevel(this.pos, this.getBlockState().getBlock());
-        }
-        profiler.endSection();
-    }*/
-
     public List<IPipeItem> getItems() {
         if (this.items == null)
             this.items = PipeNetwork.get(this.level).getItemsInPipe(this.worldPosition);
@@ -453,4 +408,49 @@ public class PipeBlockEntity extends BlockEntity implements MenuProvider, IPipeC
             return ConnectionType.BLOCKED;
         return ConnectionType.CONNECTED;
     }
+
+    public static void tick(Level level, BlockPos pos, BlockState state, PipeBlockEntity pipe) {
+        // invalidate our pressurizer reference if it was removed
+        if (pipe.pressurizer != null && pipe.pressurizer.isRemoved())
+            pipe.pressurizer = null;
+
+        if (!pipe.level.isAreaLoaded(pipe.worldPosition, 1))
+            return;
+        var profiler = pipe.level.getProfiler();
+
+        if (!pipe.level.isClientSide) {
+            // drop modules here to give a bit of time for blocks to update (iron -> gold chest etc.)
+            if (pipe.moduleDropCheck > 0) {
+                pipe.moduleDropCheck--;
+                if (pipe.moduleDropCheck <= 0 && !pipe.canHaveModules())
+                    Utility.dropInventory(pipe, pipe.modules);
+            }
+
+            profiler.push("ticking_modules");
+            var prio = 0;
+            var modules = pipe.streamModules().iterator();
+            while (modules.hasNext()) {
+                var module = modules.next();
+                module.getRight().tick(module.getLeft(), pipe);
+                prio += module.getRight().getPriority(module.getLeft(), pipe);
+            }
+            if (prio != pipe.priority) {
+                pipe.priority = prio;
+                // clear the cache so that it's reevaluated based on priority
+                PipeNetwork.get(pipe.level).clearDestinationCache(pipe.worldPosition);
+            }
+            profiler.pop();
+        }
+
+        profiler.push("ticking_items");
+        var items = pipe.getItems();
+        for (var i = items.size() - 1; i >= 0; i--)
+            items.get(i).updateInPipe(pipe);
+        if (items.size() != pipe.lastItemAmount) {
+            pipe.lastItemAmount = items.size();
+            pipe.level.updateNeighbourForOutputSignal(pipe.worldPosition, pipe.getBlockState().getBlock());
+        }
+        profiler.pop();
+    }
+
 }

src/main/java/de/ellpeck/prettypipes/pipe/PipeRenderer.java

@@ -1,10 +1,12 @@
 package de.ellpeck.prettypipes.pipe;
 
 import com.mojang.blaze3d.vertex.PoseStack;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.ItemBlockRenderTypes;
 import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.RenderType;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderer;
 import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider;
-import net.minecraft.core.BlockPos;
 import net.minecraftforge.client.ForgeHooksClient;
 import net.minecraftforge.client.model.pipeline.ForgeBlockModelRenderer;
 
@@ -33,13 +35,13 @@ public class PipeRenderer implements BlockEntityRenderer<PipeBlockEntity> {
         if (tile.cover != null) {
             matrixStack.pushPose();
             ForgeBlockModelRenderer.enableCaching();
-            // TODO figure out how to render covers, maybe finally use baked models bleh
+            var renderer = Minecraft.getInstance().getBlockRenderer();
-            /*for (RenderType layer : RenderType.chunkBufferLayers()) {
+            for (var layer : RenderType.chunkBufferLayers()) {
-                if (!RenderTypeLookup.canRenderInLayer(tile.cover, layer))
+                if (!ItemBlockRenderTypes.canRenderInLayer(tile.cover, layer))
                     continue;
                 ForgeHooksClient.setRenderType(layer);
-                Minecraft.getInstance().getBlockRenderer().renderBatched(tile.cover,tile.getBlockPos(),null, matrixStack,null, light, overlay, EmptyModelData.INSTANCE);
+                renderer.getModelRenderer().tesselateBlock(tile.getLevel(), renderer.getBlockModel(tile.cover), tile.cover, tile.getBlockPos(), matrixStack, source.getBuffer(layer), true, new Random(), tile.cover.getSeed(tile.getBlockPos()), overlay);
-            }*/
+            }
             ForgeHooksClient.setRenderType(null);
             ForgeBlockModelRenderer.clearCache();
             matrixStack.popPose();

src/main/java/de/ellpeck/prettypipes/pressurizer/PressurizerBlock.java

@@ -1,6 +1,8 @@
 package de.ellpeck.prettypipes.pressurizer;
 
+import de.ellpeck.prettypipes.Registry;
 import de.ellpeck.prettypipes.Utility;
+import de.ellpeck.prettypipes.pipe.PipeBlockEntity;
 import net.minecraft.core.BlockPos;
 import net.minecraft.network.chat.Component;
 import net.minecraft.server.level.ServerPlayer;
@@ -15,6 +17,8 @@ import net.minecraft.world.level.block.BaseEntityBlock;
 import net.minecraft.world.level.block.RenderShape;
 import net.minecraft.world.level.block.SoundType;
 import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntityTicker;
+import net.minecraft.world.level.block.entity.BlockEntityType;
 import net.minecraft.world.level.block.state.BlockBehaviour;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.material.Material;
@@ -55,4 +59,10 @@ public class PressurizerBlock extends BaseEntityBlock {
     public void appendHoverText(ItemStack stack, @Nullable BlockGetter worldIn, List<Component> tooltip, TooltipFlag flagIn) {
         Utility.addTooltip(this.getRegistryName().getPath(), tooltip);
     }
+
+    @org.jetbrains.annotations.Nullable
+    @Override
+    public <T extends BlockEntity> BlockEntityTicker<T> getTicker(Level level, BlockState state, BlockEntityType<T> type) {
+        return level.isClientSide ? null : createTickerHelper(type, Registry.pressurizerBlockEntity, PressurizerBlockEntity::tick);
+    }
 }

src/main/java/de/ellpeck/prettypipes/pressurizer/PressurizerBlockEntity.java

@@ -2,6 +2,8 @@ package de.ellpeck.prettypipes.pressurizer;
 
 import de.ellpeck.prettypipes.PrettyPipes;
 import de.ellpeck.prettypipes.Registry;
+import de.ellpeck.prettypipes.Utility;
+import de.ellpeck.prettypipes.network.PipeNetwork;
 import de.ellpeck.prettypipes.pipe.ConnectionType;
 import de.ellpeck.prettypipes.pipe.IPipeConnectable;
 import net.minecraft.core.BlockPos;
@@ -16,6 +18,7 @@ import net.minecraft.world.entity.player.Inventory;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraftforge.common.capabilities.Capability;
@@ -110,36 +113,32 @@ public class PressurizerBlockEntity extends BlockEntity implements MenuProvider,
         this.lazyThis.invalidate();
     }
 
-    // TODO tick
+    @Override
-    /*@Override
+    public ConnectionType getConnectionType(BlockPos pipePos, Direction direction) {
-    public void tick() {
+        return ConnectionType.CONNECTED;
-        if (this.world.isRemote)
+    }
-            return;
+
+    public static void tick(Level level, BlockPos pos, BlockState state, PressurizerBlockEntity pressurizer) {
         // notify pipes in network about us
-        if (this.world.getGameTime() % 10 == 0) {
+        if (pressurizer.level.getGameTime() % 10 == 0) {
-            PipeNetwork network = PipeNetwork.get(this.world);
+            var network = PipeNetwork.get(pressurizer.level);
-            for (Direction dir : Direction.values()) {
+            for (var dir : Direction.values()) {
-                BlockPos offset = this.pos.offset(dir);
+                var offset = pressurizer.worldPosition.relative(dir);
-                for (BlockPos node : network.getOrderedNetworkNodes(offset)) {
+                for (var node : network.getOrderedNetworkNodes(offset)) {
-                    if (!this.world.isBlockLoaded(node))
+                    if (!pressurizer.level.isLoaded(node))
                         continue;
-                    PipeBlockEntity pipe = network.getPipe(node);
+                    var pipe = network.getPipe(node);
                     if (pipe != null)
-                        pipe.pressurizer = this;
+                        pipe.pressurizer = pressurizer;
                 }
             }
         }
 
         // send energy update
-        if (this.lastEnergy != this.storage.getEnergyStored() && this.world.getGameTime() % 10 == 0) {
+        if (pressurizer.lastEnergy != pressurizer.storage.getEnergyStored() && pressurizer.level.getGameTime() % 10 == 0) {
-            this.lastEnergy = this.storage.getEnergyStored();
+            pressurizer.lastEnergy = pressurizer.storage.getEnergyStored();
-            Utility.sendBlockEntityToClients(this);
+            Utility.sendBlockEntityToClients(pressurizer);
         }
-    }*/
-
-    @Override
-    public ConnectionType getConnectionType(BlockPos pipePos, Direction direction) {
-        return ConnectionType.CONNECTED;
     }
 
     private static class ModifiableEnergyStorage extends EnergyStorage {

src/main/java/de/ellpeck/prettypipes/terminal/CraftingTerminalBlock.java

@@ -1,7 +1,11 @@
 package de.ellpeck.prettypipes.terminal;
 
+import de.ellpeck.prettypipes.Registry;
 import net.minecraft.core.BlockPos;
+import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntityTicker;
+import net.minecraft.world.level.block.entity.BlockEntityType;
 import net.minecraft.world.level.block.state.BlockState;
 
 public class CraftingTerminalBlock extends ItemTerminalBlock {
@@ -11,4 +15,9 @@ public class CraftingTerminalBlock extends ItemTerminalBlock {
         return new CraftingTerminalBlockEntity(pos, state);
     }
 
+    @org.jetbrains.annotations.Nullable
+    @Override
+    public <T extends BlockEntity> BlockEntityTicker<T> getTicker(Level level, BlockState state, BlockEntityType<T> type) {
+        return createTickerHelper(type, Registry.craftingTerminalBlockEntity, ItemTerminalBlockEntity::tick);
+    }
 }

src/main/java/de/ellpeck/prettypipes/terminal/ItemTerminalBlock.java

@@ -1,5 +1,6 @@
 package de.ellpeck.prettypipes.terminal;
 
+import de.ellpeck.prettypipes.Registry;
 import de.ellpeck.prettypipes.Utility;
 import net.minecraft.ChatFormatting;
 import net.minecraft.core.BlockPos;
@@ -17,6 +18,8 @@ import net.minecraft.world.level.block.BaseEntityBlock;
 import net.minecraft.world.level.block.RenderShape;
 import net.minecraft.world.level.block.SoundType;
 import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntityTicker;
+import net.minecraft.world.level.block.entity.BlockEntityType;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.material.Material;
 import net.minecraft.world.phys.BlockHitResult;
@@ -75,4 +78,11 @@ public class ItemTerminalBlock extends BaseEntityBlock {
     public void appendHoverText(ItemStack stack, @Nullable BlockGetter worldIn, List<Component> tooltip, TooltipFlag flagIn) {
         Utility.addTooltip(this.getRegistryName().getPath(), tooltip);
     }
+
+    @org.jetbrains.annotations.Nullable
+    @Override
+    public <T extends BlockEntity> BlockEntityTicker<T> getTicker(Level level, BlockState state, BlockEntityType<T> type) {
+        return createTickerHelper(type, Registry.itemTerminalBlockEntity, ItemTerminalBlockEntity::tick);
+    }
+
 }

src/main/java/de/ellpeck/prettypipes/terminal/ItemTerminalBlockEntity.java

@@ -64,44 +64,42 @@ public class ItemTerminalBlockEntity extends BlockEntity implements IPipeConnect
         this(Registry.itemTerminalBlockEntity, pos, state);
     }
 
-    // TODO tick
+    public static void tick(Level level, BlockPos pos, BlockState state, ItemTerminalBlockEntity terminal) {
-/*    @Override
+        if (terminal.level.isClientSide)
-    public void tick() {
-        if (this.level.isRemote)
             return;
-        PipeNetwork network = PipeNetwork.get(this.level);
+        var network = PipeNetwork.get(terminal.level);
-        PipeBlockEntity pipe = this.getConnectedPipe();
+        var pipe = terminal.getConnectedPipe();
         if (pipe == null)
             return;
 
-        boolean update = false;
+        var update = false;
-        int interval = pipe.pressurizer != null ? 2 : 10;
+        var interval = pipe.pressurizer != null ? 2 : 10;
-        if (this.level.getGameTime() % interval == 0) {
+        if (terminal.level.getGameTime() % interval == 0) {
-            for (int i = 6; i < 12; i++) {
+            for (var i = 6; i < 12; i++) {
-                ItemStack extracted = this.items.extractItem(i, Integer.MAX_VALUE, true);
+                var extracted = terminal.items.extractItem(i, Integer.MAX_VALUE, true);
                 if (extracted.isEmpty())
                     continue;
-                ItemStack remain = network.routeItem(pipe.getPos(), this.pos, extracted, true);
+                var remain = network.routeItem(pipe.getBlockPos(), terminal.getBlockPos(), extracted, true);
                 if (remain.getCount() == extracted.getCount())
                     continue;
-                this.items.extractItem(i, extracted.getCount() - remain.getCount(), false);
+                terminal.items.extractItem(i, extracted.getCount() - remain.getCount(), false);
                 break;
             }
 
-            if (!this.existingRequests.isEmpty()) {
+            if (!terminal.existingRequests.isEmpty()) {
-                NetworkLock request = this.existingRequests.remove();
+                var request = terminal.existingRequests.remove();
                 network.resolveNetworkLock(request);
-                network.requestExistingItem(request.location, pipe.getPos(), this.pos, request, request.stack, ItemEquality.NBT);
+                network.requestExistingItem(request.location, pipe.getBlockPos(), terminal.getBlockPos(), request, request.stack, ItemEquality.NBT);
                 update = true;
             }
         }
 
-        if (this.level.getGameTime() % 100 == 0 || update) {
+        if (terminal.level.getGameTime() % 100 == 0 || update) {
-            PlayerEntity[] lookingPlayers = this.getLookingPlayers();
+            var lookingPlayers = terminal.getLookingPlayers();
             if (lookingPlayers.length > 0)
-                this.updateItems(lookingPlayers);
+                terminal.updateItems(lookingPlayers);
         }
-    }*/
+    }
 
     @Override
     public void setRemoved() {