gistfile1.txt

It captures the UpdateBlockPacket message for the actual 200, 0, 200 block, and detects it's runtime entity ID as 2231:

INFO  2019-07-06 15:38:33,064 [games.redpoint.App.main()][ConditionalCommandNode.java:73] : on success: switching to success node
WARN  2019-07-06 15:38:33,086 [Network Listener - #2][PapyrusBot.java:272] : Found bed, it's runtime entity ID is 2231
DEBUG 2019-07-06 15:38:33,086 [Network Listener - #2][DefaultBatchHandler.java:27] : Unhandled packet for /34.94.110.9:19132: BlockEntityDataPacket(blockPosition=(200, 0, 200), data=TAG_Compound: 6 entries
(
   TAG_Byte("color"): 14
   TAG_Int("x"): 200
   TAG_Int("y"): 0
   TAG_Byte("isMovable"): 1
   TAG_Int("z"): 200
   TAG_String("id"): Bed
))
DEBUG 2019-07-06 15:38:33,087 [Network Listener - #2][DefaultBatchHandler.java:27] : Unhandled packet for /34.94.110.9:19132: UpdateBlockPacket(flags=[NETWORK], blockPosition=(200, 0, 199), runtimeId=3064, dataLayer=0)
DEBUG 2019-07-06 15:38:33,087 [Network Listener - #2][DefaultBatchHandler.java:27] : Unhandled packet for /34.94.110.9:19132: BlockEntityDataPacket(blockPosition=(200, 0, 199), data=TAG_Compound: 6 entries
(
   TAG_Byte("color"): 14
   TAG_Int("x"): 200
   TAG_Int("y"): 0
   TAG_Byte("isMovable"): 1
   TAG_Int("z"): 199
   TAG_String("id"): Bed
))

Once the bot has the position of the bed, it tries to use interact and player action packets to actually start sleeping:

                        .add(new SetBlockCommandNode(new Vector3i(200, 1, 199), "torch"))
                        .add(new DelegatingCommandNode((StatefulCommandGraph graph, PapyrusBot bot) -> {
                            if (this.bedRuntimeEntityId == 0) {
                                return CommandNodeState.PENDING;
                            }
                            return CommandNodeState.SUCCESS;
                        })).add(new StateChangeCommandNode("sleep")));

        Random r = new Random();

        this.commandGraph.add("sleep",
                new SequentialCommandNode().add(new ExecuteCommandNode("time set midnight", RetryPolicy.ALWAYS_RETRY))
                        .add(new ExecuteCommandNode("tp @s 201 0 199 90 45", RetryPolicy.ALWAYS_RETRY))
                        .add(new DelegatingCommandNode((StatefulCommandGraph graph, PapyrusBot bot) -> {
                            LOG.info("Sending player action packet");
                            PlayerActionPacket packet = new PlayerActionPacket();
                            packet.setRuntimeEntityId(this.bedRuntimeEntityId);
                            packet.setBlockPosition(new Vector3i(200, 0, 200));
                            packet.setAction(Action.START_SLEEP);
                            session.sendPacketImmediately(packet);

                            LOG.info("Sending interact packet");
                            InteractPacket packet2 = new InteractPacket();
                            packet2.setRuntimeEntityId(this.bedRuntimeEntityId);
                            packet2.setMousePosition(new Vector3f(r.nextDouble(), r.nextDouble(), r.nextDouble()));
                            packet2.setAction(2);
                            session.sendPacketImmediately(packet2);

                            LOG.info("Sending interact packet");
                            InteractPacket packet3 = new InteractPacket();
                            packet3.setRuntimeEntityId(this.bedRuntimeEntityId);
                            packet3.setMousePosition(new Vector3f(r.nextDouble(), r.nextDouble(), r.nextDouble()));
                            packet3.setAction(0);
                            session.sendPacketImmediately(packet3);

                            return CommandNodeState.PENDING;
                        })));