Implement TransactionConfirmation event + packet

bot/event.go

@@ -51,8 +51,9 @@ type eventBroker struct {
 	//   total - total amount of experience received from level 0.
 	ExperienceChange func(bar float32, level int32, total int32) error
 
-	WindowsItem       func(id byte, slots []entity.Slot) error
-	WindowsItemChange func(id byte, slotID int, slot entity.Slot) error
+	WindowsItem        func(id byte, slots []entity.Slot) error
+	WindowsItemChange  func(id byte, slotID int, slot entity.Slot) error
+	WindowConfirmation func(pkt ptypes.ConfirmTransaction) error
 
 	// ServerDifficultyChange is called whenever the gamemode of the server changes.
 	// At time of writing (1.16.3), difficulty values of 0, 1, 2, and 3 correspond

bot/ingame.go

@@ -151,6 +151,8 @@ func (c *Client) handlePacket(p pk.Packet) (disconnect bool, err error) {
 		err = handleWindowItemsPacket(c, p)
 	case data.OpenWindow:
 		err = handleOpenWindowPacket(c, p)
+	case data.TransactionClientbound:
+		err = handleWindowConfirmationPacket(c, p)
 
 	case data.DeclareRecipes:
 		// handleDeclareRecipesPacket(g, reader)
@@ -736,6 +738,18 @@ func handleOpenWindowPacket(c *Client, p pk.Packet) error {
 	return nil
 }
 
+func handleWindowConfirmationPacket(c *Client, p pk.Packet) error {
+	var pkt ptypes.ConfirmTransaction
+	if err := pkt.Decode(p); err != nil {
+		return err
+	}
+
+	if c.Events.WindowConfirmation != nil {
+		return c.Events.WindowConfirmation(pkt)
+	}
+	return nil
+}
+
 func handleSetExperience(c *Client, p pk.Packet) (err error) {
 	var (
 		bar   pk.Float

bot/phy/phy.go

@@ -17,8 +17,8 @@ const (
 	playerHeight = 1.8
 	resetVel     = 0.003
 
-	maxYawChange   = 7
-	maxPitchChange = 5
+	maxYawChange   = 11
+	maxPitchChange = 7
 
 	stepHeight       = 0.6
 	minJumpTicks     = 14

bot/world/entity/entity.go

@@ -1,8 +1,10 @@
 package entity
 
 import (
+	"bytes"
+
 	"github.com/Tnze/go-mc/data/entity"
-	item "github.com/Tnze/go-mc/data/items"
+	item "github.com/Tnze/go-mc/data/item"
 	"github.com/Tnze/go-mc/nbt"
 	pk "github.com/Tnze/go-mc/net/packet"
 	"github.com/google/uuid"
@@ -45,7 +47,7 @@ type Entity struct {
 // The Slot data structure is how Minecraft represents an item and its associated data in the Minecraft Protocol
 type Slot struct {
 	Present bool
-	ItemID  int32
+	ItemID  item.ID
 	Count   int8
 	NBT     interface{}
 }
@@ -56,9 +58,11 @@ func (s *Slot) Decode(r pk.DecodeReader) error {
 		return err
 	}
 	if s.Present {
-		if err := (*pk.VarInt)(&s.ItemID).Decode(r); err != nil {
+		var itemID pk.VarInt
+		if err := itemID.Decode(r); err != nil {
 			return err
 		}
+		s.ItemID = item.ID(itemID)
 		if err := (*pk.Byte)(&s.Count).Decode(r); err != nil {
 			return err
 		}
@@ -69,6 +73,25 @@ func (s *Slot) Decode(r pk.DecodeReader) error {
 	return nil
 }
 
+func (s Slot) Encode() []byte {
+	if !s.Present {
+		return pk.Boolean(false).Encode()
+	}
+
+	var b bytes.Buffer
+	b.Write(pk.Boolean(true).Encode())
+	b.Write(pk.VarInt(s.ItemID).Encode())
+	b.Write(pk.Byte(s.Count).Encode())
+
+	if s.NBT != nil {
+		nbt.NewEncoder(&b).Encode(s.NBT)
+	} else {
+		b.Write([]byte{nbt.TagEnd})
+	}
+
+	return b.Bytes()
+}
+
 func (s Slot) String() string {
 	return item.ByID[item.ID(s.ItemID)].DisplayName
 }

data/inv/inv.go

@@ -0,0 +1,18 @@
+// Package inv maps window types to inventory slot information.
+package inv
+
+type Info struct {
+	Name       string
+	Start, End int // Player inventory
+	Slots      int
+}
+
+var ByType = map[int]Info{
+	-1: Info{Name: "inventory", Start: 9, End: 44, Slots: 46},
+	0:  Info{Name: "generic_9x1", Start: 1 * 9, End: 1*9 + 35, Slots: 1*9 + 36},
+	1:  Info{Name: "generic_9x2", Start: 2 * 9, End: 2*9 + 35, Slots: 2*9 + 36},
+	2:  Info{Name: "generic_9x3", Start: 3 * 9, End: 3*9 + 35, Slots: 3*9 + 36},
+	3:  Info{Name: "generic_9x4", Start: 4 * 9, End: 4*9 + 35, Slots: 4*9 + 36},
+	4:  Info{Name: "generic_9x5", Start: 5 * 9, End: 5*9 + 35, Slots: 5*9 + 36},
+	5:  Info{Name: "generic_9x6", Start: 6 * 9, End: 6*9 + 35, Slots: 6*9 + 36},
+}

net/ptypes/inventory.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/Tnze/go-mc/bot/world/entity"
 	"github.com/Tnze/go-mc/chat"
+	"github.com/Tnze/go-mc/data"
 	"github.com/Tnze/go-mc/nbt"
 	pk "github.com/Tnze/go-mc/net/packet"
 )
@@ -67,3 +68,22 @@ func (p *OpenWindow) Decode(pkt pk.Packet) error {
 	}
 	return nil
 }
+
+type ConfirmTransaction struct {
+	WindowID pk.Byte
+	ActionID pk.Short
+	Accepted pk.Boolean
+}
+
+func (p *ConfirmTransaction) Decode(pkt pk.Packet) error {
+	return pkt.Scan(&p.WindowID, &p.ActionID, &p.Accepted)
+}
+
+func (p ConfirmTransaction) Encode() pk.Packet {
+	return pk.Marshal(
+		data.TransactionServerbound,
+		p.WindowID,
+		p.ActionID,
+		p.Accepted,
+	)
+}