In app purchases in Godot Engine: Examples

Godot IAP.gd

# Intent: interface to the GodotPayments module (remember to add the java path in the project settings android>modules )
"Intent.gd"

extends Node
# Interface for the GodotPayments module
# To use extend this script and save the result on the Global singleton 'Data'

const STATIC_RESPONSE_NONE = 0
const STATIC_RESPONSE_ALL = 1
const STATIC_RESPONSE_PURCHASED = 2
const STATIC_RESPONSE_CANCELED = 3
const STATIC_RESPONSE_REFUNDED = 4
const STATIC_RESPONSE_ITEM_UNAVAILABLE = 5

var payments = null
var static_response = STATIC_RESPONSE_PURCHASED

# CALLBACKS: overwrite these

func do_intent():
	pass

func purchase_success(receipt, signature, sku):
	pass

func purchase_fail():
	pass

func purchase_cancel():
	pass

func purchase_owned(sku):
	pass

func consume_success(receipt, signature, sku):
	pass

func has_purchased(receipt, signature, sku):
	pass


# PUBLICS
func _ready():
	payments = Globals.get_singleton("GodotPayments")

func start_intent():
	if payments != null:
		payments.setPurchaseCallbackId(get_instance_ID())
		do_intent()

func set_static_response(static_response_type):
	static_response = static_response_type

func set_auto_consume(autoConsume):
	if payments != null:
		payments.setAutoConsume(autoConsume)

func request_purchased():
	if payments != null:
		payments.requestPurchased()

func consume_unconsumed_purchases():
	if payments != null:
		payments.consumeUnconsumedPurchases()

func purchase(item, payload = ""):
	if payments != null:
		payments.purchase(get_sku(item), payload)

func consume(item):
	if payments != null:
		payments.consume(item)

# PRIVATES: DO NOT OVERWRITE!

func get_sku(item):
	if static_response == STATIC_RESPONSE_NONE:
		return item
	elif static_response == STATIC_RESPONSE_ALL:
		var i = randi() % 4
		if i == 0:
			return "android.test.purchased"
		elif i == 1:
			return "android.test.canceled"
		elif i == 2:
			return "android.test.refunded"
		elif i == 3:
			return "android.test.item_unavailable"
	elif static_response == STATIC_RESPONSE_PURCHASED:
		return "android.test.purchased"
	elif static_response == STATIC_RESPONSE_CANCELED:
		return "android.test.canceled"
	elif static_response == STATIC_RESPONSE_REFUNDED:
		return "android.test.refunded"
	elif static_response == STATIC_RESPONSE_ITEM_UNAVAILABLE:
		return "android.test.item_unavailable"






# EXAMPLE 1: An intent to consume previous purchases on startup:
	
extends "Intent.gd"

func _ready():
	start_intent()

func do_intent():
	consume_unconsumed_purchases()

func consume_success(receipt, signature, sku):
	print("consuming previous purchased: ", sku, ", receipt: ", receipt, ", signature: ", signature)
	if sku == "power" or sku == "android.test.purchased":
		var c = Globals.get("Data").get("power") + 1
		Globals.get("Data").set("power", c)
		Globals.get("Data").flush_database()

# EXAMPLE 2: Buy an item
func _on_buyButton_pressed():
	if OS.get_name().findn("android") >= 0:
		get_node("buyPower").start_intent()

# On node 'buyPower' (extends Intent.gd):
func buyPower():
  purchase("power")

It's a cool script but I tried to install everything as you explained it in the file and line 45 at get_singleton("GodotPayments") I always get [Object:Null] as the value of payments...
Do you have any idea what I did wrong?

@Neroware did you add
[android] modules="org/godotengine/godot/GodotPaymentV3"
to engine.cfg?