feat(godot): marketplace browse, search/filter and buy UI

scenes/marketplace_ui.tscn

@@ -0,0 +1,96 @@
+[gd_scene load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://scripts/marketplace_ui.gd" id="1_mpu"]
+
+[node name="MarketplaceUI" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_mpu")
+
+[node name="VBox" type="VBoxContainer" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = 32.0
+offset_top = 32.0
+offset_right = -32.0
+offset_bottom = -32.0
+grow_horizontal = 2
+grow_vertical = 2
+theme_override_constants/separation = 12
+
+[node name="HeaderHBox" type="HBoxContainer" parent="VBox"]
+layout_mode = 2
+theme_override_constants/separation = 16
+
+[node name="BackButton" type="Button" parent="VBox/HeaderHBox"]
+custom_minimum_size = Vector2(100, 36)
+layout_mode = 2
+text = "< Back"
+
+[node name="TitleLabel" type="Label" parent="VBox/HeaderHBox"]
+layout_mode = 2
+size_flags_horizontal = 3
+theme_override_font_sizes/font_size = 24
+text = "Marketplace"
+horizontal_alignment = 1
+
+[node name="BalanceLabel" type="Label" parent="VBox/HeaderHBox"]
+layout_mode = 2
+theme_override_font_sizes/font_size = 18
+theme_override_colors/font_color = Color(1, 0.84, 0, 1)
+text = "Wallet: 0 CR"
+
+[node name="RefreshButton" type="Button" parent="VBox/HeaderHBox"]
+custom_minimum_size = Vector2(100, 36)
+layout_mode = 2
+text = "Refresh"
+
+[node name="FilterBar" type="HBoxContainer" parent="VBox"]
+layout_mode = 2
+theme_override_constants/separation = 8
+
+[node name="SearchEdit" type="LineEdit" parent="VBox/FilterBar"]
+custom_minimum_size = Vector2(200, 36)
+layout_mode = 2
+size_flags_horizontal = 3
+placeholder_text = "Search items by name or description..."
+
+[node name="TypeOption" type="OptionButton" parent="VBox/FilterBar"]
+custom_minimum_size = Vector2(140, 36)
+layout_mode = 2
+
+[node name="MinPriceEdit" type="LineEdit" parent="VBox/FilterBar"]
+custom_minimum_size = Vector2(90, 36)
+layout_mode = 2
+placeholder_text = "Min CR"
+
+[node name="MaxPriceEdit" type="LineEdit" parent="VBox/FilterBar"]
+custom_minimum_size = Vector2(90, 36)
+layout_mode = 2
+placeholder_text = "Max CR"
+
+[node name="SearchBtn" type="Button" parent="VBox/FilterBar"]
+custom_minimum_size = Vector2(90, 36)
+layout_mode = 2
+text = "Search"
+
+[node name="StatusLabel" type="Label" parent="VBox"]
+layout_mode = 2
+horizontal_alignment = 1
+
+[node name="Scroll" type="ScrollContainer" parent="VBox"]
+layout_mode = 2
+size_flags_vertical = 3
+
+[node name="ListingsGrid" type="GridContainer" parent="VBox/Scroll"]
+layout_mode = 2
+size_flags_horizontal = 3
+theme_override_constants/h_separation = 16
+theme_override_constants/v_separation = 16
+columns = 4

scenes/wallet_ui.tscn

@@ -0,0 +1,136 @@
+[gd_scene load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://scripts/wallet_ui.gd" id="1_wui"]
+
+[node name="WalletUI" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_wui")
+
+[node name="VBox" type="VBoxContainer" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = 32.0
+offset_top = 32.0
+offset_right = -32.0
+offset_bottom = -32.0
+grow_horizontal = 2
+grow_vertical = 2
+theme_override_constants/separation = 16
+
+[node name="HeaderHBox" type="HBoxContainer" parent="VBox"]
+layout_mode = 2
+theme_override_constants/separation = 16
+
+[node name="BackButton" type="Button" parent="VBox/HeaderHBox"]
+custom_minimum_size = Vector2(100, 36)
+layout_mode = 2
+text = "< Back"
+
+[node name="TitleLabel" type="Label" parent="VBox/HeaderHBox"]
+layout_mode = 2
+size_flags_horizontal = 3
+theme_override_font_sizes/font_size = 24
+text = "Wallet & Credits"
+horizontal_alignment = 1
+
+[node name="RefreshButton" type="Button" parent="VBox/HeaderHBox"]
+custom_minimum_size = Vector2(100, 36)
+layout_mode = 2
+text = "Refresh"
+
+[node name="StatusLabel" type="Label" parent="VBox"]
+layout_mode = 2
+horizontal_alignment = 1
+
+[node name="BalanceCard" type="PanelContainer" parent="VBox"]
+layout_mode = 2
+
+[node name="Margin" type="MarginContainer" parent="VBox/BalanceCard"]
+layout_mode = 2
+theme_override_constants/margin_left = 16
+theme_override_constants/margin_top = 16
+theme_override_constants/margin_right = 16
+theme_override_constants/margin_bottom = 16
+
+[node name="HBox" type="HBoxContainer" parent="VBox/BalanceCard/Margin"]
+layout_mode = 2
+theme_override_constants/separation = 20
+
+[node name="BalTitle" type="Label" parent="VBox/BalanceCard/Margin/HBox"]
+layout_mode = 2
+theme_override_font_sizes/font_size = 18
+text = "Available Balance:"
+
+[node name="BalanceLabel" type="Label" parent="VBox/BalanceCard/Margin/HBox"]
+layout_mode = 2
+theme_override_font_sizes/font_size = 22
+text = "0 CR"
+
+[node name="Spacer" type="Control" parent="VBox/BalanceCard/Margin/HBox"]
+layout_mode = 2
+size_flags_horizontal = 3
+
+[node name="PacksHBox" type="HBoxContainer" parent="VBox/BalanceCard/Margin/HBox"]
+layout_mode = 2
+theme_override_constants/separation = 8
+
+[node name="Buy100Btn" type="Button" parent="VBox/BalanceCard/Margin/HBox/PacksHBox"]
+layout_mode = 2
+text = "+100 CR ($0.99)"
+
+[node name="Buy500Btn" type="Button" parent="VBox/BalanceCard/Margin/HBox/PacksHBox"]
+layout_mode = 2
+text = "+500 CR ($4.99)"
+
+[node name="Buy1000Btn" type="Button" parent="VBox/BalanceCard/Margin/HBox/PacksHBox"]
+layout_mode = 2
+text = "+1,000 CR ($9.99)"
+
+[node name="Buy5000Btn" type="Button" parent="VBox/BalanceCard/Margin/HBox/PacksHBox"]
+layout_mode = 2
+text = "+5,000 CR ($44.99)"
+
+[node name="LedgerSection" type="VBoxContainer" parent="VBox"]
+layout_mode = 2
+size_flags_vertical = 3
+theme_override_constants/separation = 8
+
+[node name="LedgerTitle" type="Label" parent="VBox/LedgerSection"]
+layout_mode = 2
+theme_override_font_sizes/font_size = 18
+text = "Ledger History"
+
+[node name="Scroll" type="ScrollContainer" parent="VBox/LedgerSection"]
+layout_mode = 2
+size_flags_vertical = 3
+
+[node name="TxList" type="VBoxContainer" parent="VBox/LedgerSection/Scroll"]
+layout_mode = 2
+size_flags_horizontal = 3
+theme_override_constants/separation = 6
+
+[node name="PagingHBox" type="HBoxContainer" parent="VBox/LedgerSection"]
+layout_mode = 2
+alignment = 1
+theme_override_constants/separation = 16
+
+[node name="PrevPageBtn" type="Button" parent="VBox/LedgerSection/PagingHBox"]
+custom_minimum_size = Vector2(80, 32)
+layout_mode = 2
+text = "Previous"
+
+[node name="PageLabel" type="Label" parent="VBox/LedgerSection/PagingHBox"]
+layout_mode = 2
+text = "Page 1 of 1"
+
+[node name="NextPageBtn" type="Button" parent="VBox/LedgerSection/PagingHBox"]
+custom_minimum_size = Vector2(80, 32)
+layout_mode = 2
+text = "Next"

scripts/api_client.gd

@@ -138,7 +138,8 @@ func request(
 	path: String,
 	body: String = "",
 	content_type: String = "application/json",
-	require_auth: bool = false
+	require_auth: bool = false,
+	custom_headers: PackedStringArray = PackedStringArray()
 ) -> Dictionary:
 	var http := HTTPRequest.new()
 	http.timeout = timeout_seconds
@@ -152,6 +153,8 @@ func request(
 		headers.append("Content-Type: " + content_type)
 	if require_auth and has_token():
 		headers.append("Authorization: " + bearer_token)
+	for ch in custom_headers:
+		headers.append(ch)
 
 	var url := _base_url + path
 	var err := http.request(url, headers, method, body)

scripts/economy_api_client.gd

@@ -0,0 +1,142 @@
+extends RefCounted
+class_name EconomyApiClient
+## Helper class for AGP Economy REST endpoints (Wallet, Payments, Marketplace, Payouts).
+##
+## docs/planning/economy.md US-6 (task cc09c1428892).
+
+static func get_api_client(node: Node) -> Node:
+	if node.has_node("/root/ApiClient"):
+		return node.get_node("/root/ApiClient")
+	return null
+
+static func generate_idempotency_key() -> String:
+	return "%d-%d" % [Time.get_unix_time_from_system(), randi() % 1000000]
+
+# ── Wallet & Currency ──
+
+static func get_wallet(api: Node) -> Dictionary:
+	return await api.request(HTTPClient.METHOD_GET, "/api/wallet", "", "application/json", true)
+
+static func get_wallet_transactions(api: Node, limit: int = 50, offset: int = 0) -> Dictionary:
+	return await api.request(HTTPClient.METHOD_GET, "/api/wallet/transactions?limit=%d&offset=%d" % [limit, offset], "", "application/json", true)
+
+# ── Premium Purchases ──
+
+static func purchase_credits(api: Node, credits: int, idempotency_key: String = "") -> Dictionary:
+	var custom_headers := PackedStringArray()
+	var key := idempotency_key if idempotency_key != "" else generate_idempotency_key()
+	custom_headers.append("Idempotency-Key: " + key)
+
+	var sess_res: Dictionary = await api.request(
+		HTTPClient.METHOD_POST,
+		"/api/payments/purchase",
+		JSON.stringify({"credits": credits}),
+		"application/json",
+		true,
+		custom_headers
+	)
+	if not sess_res.ok:
+		return sess_res
+
+	var sess_id: String = str(sess_res.data.get("session_id", ""))
+	if sess_id == "":
+		return {"ok": false, "status": 0, "data": null, "detail": "Invalid session returned"}
+
+	return await api.request(
+		HTTPClient.METHOD_POST,
+		"/api/payments/confirm",
+		JSON.stringify({"session_id": sess_id}),
+		"application/json",
+		true
+	)
+
+# ── Catalog Items & Listings ──
+
+static func get_catalog_items(api: Node, mine: bool = false, item_type: String = "", limit: int = 50, offset: int = 0) -> Dictionary:
+	var q := "/api/marketplace/items?limit=%d&offset=%d" % [limit, offset]
+	if mine:
+		q += "&mine=true"
+	if item_type != "":
+		q += "&item_type=" + item_type.uri_encode()
+	return await api.request(HTTPClient.METHOD_GET, q, "", "application/json", true)
+
+static func create_catalog_item(api: Node, name: String, item_type: String, description: String = "", metadata_json: Dictionary = {}) -> Dictionary:
+	var payload := {
+		"name": name,
+		"item_type": item_type,
+		"description": description,
+		"metadata_json": metadata_json
+	}
+	return await api.request(HTTPClient.METHOD_POST, "/api/marketplace/items", JSON.stringify(payload), "application/json", true)
+
+static func create_listing(api: Node, catalog_item_id: int, price: int) -> Dictionary:
+	var payload := {
+		"catalog_item_id": catalog_item_id,
+		"price": price
+	}
+	return await api.request(HTTPClient.METHOD_POST, "/api/marketplace/listings", JSON.stringify(payload), "application/json", true)
+
+static func search_listings(api: Node, query: String = "", item_type: String = "", min_price: int = -1, max_price: int = -1, limit: int = 50, offset: int = 0) -> Dictionary:
+	var q := "/api/marketplace/listings?limit=%d&offset=%d" % [limit, offset]
+	if query != "":
+		q += "&q=" + query.uri_encode()
+	if item_type != "":
+		q += "&item_type=" + item_type.uri_encode()
+	if min_price >= 0:
+		q += "&min_price=%d" % min_price
+	if max_price >= 0:
+		q += "&max_price=%d" % max_price
+	return await api.request(HTTPClient.METHOD_GET, q, "", "application/json", false)
+
+static func get_listing(api: Node, listing_id: int) -> Dictionary:
+	return await api.request(HTTPClient.METHOD_GET, "/api/marketplace/listings/%d" % listing_id, "", "application/json", false)
+
+static func update_listing(api: Node, listing_id: int, price: int = -1, status: String = "") -> Dictionary:
+	var payload := {}
+	if price > 0:
+		payload["price"] = price
+	if status != "":
+		payload["status"] = status
+	return await api.request(HTTPClient.METHOD_PATCH, "/api/marketplace/listings/%d" % listing_id, JSON.stringify(payload), "application/json", true)
+
+static func delist_listing(api: Node, listing_id: int) -> Dictionary:
+	return await api.request(HTTPClient.METHOD_DELETE, "/api/marketplace/listings/%d" % listing_id, "", "application/json", true)
+
+# ── Purchases & Escrow ──
+
+static func purchase_listing(api: Node, listing_id: int, idempotency_key: String = "") -> Dictionary:
+	var custom_headers := PackedStringArray()
+	var key := idempotency_key if idempotency_key != "" else generate_idempotency_key()
+	custom_headers.append("Idempotency-Key: " + key)
+
+	return await api.request(
+		HTTPClient.METHOD_POST,
+		"/api/marketplace/listings/%d/purchase" % listing_id,
+		"",
+		"application/json",
+		true,
+		custom_headers
+	)
+
+static func get_purchases(api: Node, role: String = "all", limit: int = 50, offset: int = 0) -> Dictionary:
+	return await api.request(
+		HTTPClient.METHOD_GET,
+		"/api/marketplace/purchases?role=%s&limit=%d&offset=%d" % [role.uri_encode(), limit, offset],
+		"",
+		"application/json",
+		true
+	)
+
+# ── Creator Balances & Payouts ──
+
+static func get_creator_balance(api: Node) -> Dictionary:
+	return await api.request(HTTPClient.METHOD_GET, "/api/marketplace/creator/balance", "", "application/json", true)
+
+static func request_payout(api: Node, amount: int, external_ref: String = "") -> Dictionary:
+	var payload := {"amount": amount}
+	if external_ref != "":
+		payload["external_ref"] = external_ref
+	return await api.request(HTTPClient.METHOD_POST, "/api/payouts", JSON.stringify(payload), "application/json", true)
+
+static func get_payouts(api: Node, limit: int = 50, offset: int = 0) -> Dictionary:
+	return await api.request(HTTPClient.METHOD_GET, "/api/payouts?limit=%d&offset=%d" % [limit, offset], "", "application/json", true)

scripts/marketplace_ui.gd

@@ -0,0 +1,231 @@
+extends Control
+class_name MarketplaceUI
+## Marketplace Browse & Buy UI panel.
+##
+## Displays:
+## - Search bar with keyword, item type, and price filters
+## - Marketplace active listings cards
+## - Item details and direct atomic purchase flow
+## - Wallet balance and real-time status feedback
+##
+## docs/planning/economy.md US-6 (task 9797a0cfd9e6).
+
+signal back_requested
+signal item_purchased(listing_id: int)
+
+@onready var back_button: Button = $VBox/HeaderHBox/BackButton
+@onready var refresh_button: Button = $VBox/HeaderHBox/RefreshButton
+@onready var balance_label: Label = $VBox/HeaderHBox/BalanceLabel
+@onready var status_label: Label = $VBox/StatusLabel
+
+# Filter inputs
+@onready var search_edit: LineEdit = $VBox/FilterBar/SearchEdit
+@onready var type_option: OptionButton = $VBox/FilterBar/TypeOption
+@onready var min_price_edit: LineEdit = $VBox/FilterBar/MinPriceEdit
+@onready var max_price_edit: LineEdit = $VBox/FilterBar/MaxPriceEdit
+@onready var search_btn: Button = $VBox/FilterBar/SearchBtn
+
+# Listings container
+@onready var listings_container: GridContainer = $VBox/Scroll/ListingsGrid
+
+var _api_client: Node = null
+
+
+func _ready() -> void:
+	_api_client = _get_api()
+	_setup_type_options()
+	_wire_signals()
+	if _api_client != null and _api_client.has_token():
+		refresh_balance()
+		search_listings()
+
+
+func _get_api() -> Node:
+	if has_node("/root/ApiClient"):
+		return get_node("/root/ApiClient")
+	return null
+
+
+func _setup_type_options() -> void:
+	if not type_option:
+		return
+	type_option.clear()
+	type_option.add_item("All Types", 0)
+	type_option.add_item("Avatar Item", 1)
+	type_option.add_item("Asset", 2)
+	type_option.add_item("Experience Pass", 3)
+
+
+func _wire_signals() -> void:
+	if back_button and not back_button.pressed.is_connected(_on_back_pressed):
+		back_button.pressed.connect(_on_back_pressed)
+	if refresh_button and not refresh_button.pressed.is_connected(refresh_all):
+		refresh_button.pressed.connect(refresh_all)
+	if search_btn and not search_btn.pressed.is_connected(search_listings):
+		search_btn.pressed.connect(search_listings)
+	if search_edit and not search_edit.text_submitted.is_connected(func(_txt): search_listings()):
+		search_edit.text_submitted.connect(func(_txt): search_listings())
+
+
+func _on_back_pressed() -> void:
+	back_requested.emit()
+
+
+func show_status(text: String, is_error: bool = false) -> void:
+	if not status_label:
+		return
+	status_label.text = text
+	if is_error:
+		status_label.add_theme_color_override("font_color", Color(1.0, 0.3, 0.3))
+	else:
+		status_label.add_theme_color_override("font_color", Color(0.3, 0.9, 0.3))
+
+
+func refresh_all() -> void:
+	refresh_balance()
+	search_listings()
+
+
+func refresh_balance() -> void:
+	var api = _get_api()
+	if not api or not api.has_token():
+		return
+	var res: Dictionary = await EconomyApiClient.get_wallet(api)
+	if res.ok and res.data is Dictionary:
+		var balance: int = int(res.data.get("balance", 0))
+		if balance_label:
+			balance_label.text = "Wallet: %d CR" % balance
+
+
+func search_listings() -> void:
+	var api = _get_api()
+	if not api:
+		return
+
+	var q: String = search_edit.text.strip_edges() if search_edit else ""
+	var item_type: String = ""
+	if type_option and type_option.selected > 0:
+		match type_option.selected:
+			1: item_type = "avatar_item"
+			2: item_type = "asset"
+			3: item_type = "experience_pass"
+
+	var min_price: int = -1
+	if min_price_edit and min_price_edit.text.is_valid_int():
+		min_price = min_price_edit.text.to_int()
+
+	var max_price: int = -1
+	if max_price_edit and max_price_edit.text.is_valid_int():
+		max_price = max_price_edit.text.to_int()
+
+	show_status("Loading listings...")
+	var res: Dictionary = await EconomyApiClient.search_listings(api, q, item_type, min_price, max_price)
+	if res.ok and res.data is Dictionary:
+		var items: Array = res.data.get("listings", [])
+		render_listings(items)
+		show_status("Found %d active listings" % items.size())
+	else:
+		show_status("Search failed: " + res.detail, true)
+
+
+func render_listings(listings: Array) -> void:
+	if not listings_container:
+		return
+
+	for c in listings_container.get_children():
+		listings_container.remove_child(c)
+		c.queue_free()
+
+	if listings.is_empty():
+		var empty_lbl := Label.new()
+		empty_lbl.text = "No listings matching your search."
+		empty_lbl.add_theme_color_override("font_color", Color(0.6, 0.6, 0.6))
+		listings_container.add_child(empty_lbl)
+		return
+
+	for l in listings:
+		if not l is Dictionary:
+			continue
+		var card := _create_listing_card(l)
+		listings_container.add_child(card)
+
+
+func _create_listing_card(listing: Dictionary) -> Control:
+	var card := PanelContainer.new()
+	card.custom_minimum_size = Vector2(240, 200)
+
+	var margin := MarginContainer.new()
+	margin.add_theme_constant_override("margin_left", 12)
+	margin.add_theme_constant_override("margin_top", 12)
+	margin.add_theme_constant_override("margin_right", 12)
+	margin.add_theme_constant_override("margin_bottom", 12)
+	card.add_child(margin)
+
+	var vbox := VBoxContainer.new()
+	vbox.add_theme_constant_override("separation", 8)
+	margin.add_child(vbox)
+
+	var cat_item: Dictionary = listing.get("catalog_item", {})
+	var title_lbl := Label.new()
+	title_lbl.text = str(cat_item.get("name", "Unnamed Item"))
+	title_lbl.add_theme_font_size_override("font_size", 16)
+	vbox.add_child(title_lbl)
+
+	var type_lbl := Label.new()
+	var itype: String = str(cat_item.get("item_type", "")).replace("_", " ").capitalize()
+	type_lbl.text = itype
+	type_lbl.add_theme_color_override("font_color", Color(0.4, 0.7, 1.0))
+	type_lbl.add_theme_font_size_override("font_size", 12)
+	vbox.add_child(type_lbl)
+
+	var seller_lbl := Label.new()
+	var seller_name: String = str(listing.get("seller_username", "Unknown"))
+	seller_lbl.text = "By " + seller_name
+	seller_lbl.add_theme_color_override("font_color", Color(0.6, 0.6, 0.6))
+	seller_lbl.add_theme_font_size_override("font_size", 12)
+	vbox.add_child(seller_lbl)
+
+	var desc_lbl := Label.new()
+	var desc: String = str(cat_item.get("description", ""))
+	if desc.length() > 60:
+		desc = desc.substr(0, 57) + "..."
+	desc_lbl.text = desc
+	desc_lbl.size_flags_vertical = Control.SIZE_EXPAND_FILL
+	desc_lbl.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
+	vbox.add_child(desc_lbl)
+
+	var bottom_hbox := HBoxContainer.new()
+	vbox.add_child(bottom_hbox)
+
+	var price: int = int(listing.get("price", 0))
+	var price_lbl := Label.new()
+	price_lbl.text = "%d CR" % price
+	price_lbl.add_theme_font_size_override("font_size", 16)
+	price_lbl.add_theme_color_override("font_color", Color(1.0, 0.8, 0.2))
+	price_lbl.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+	bottom_hbox.add_child(price_lbl)
+
+	var buy_btn := Button.new()
+	buy_btn.text = "Buy"
+	buy_btn.custom_minimum_size = Vector2(80, 32)
+	var listing_id: int = int(listing.get("id", 0))
+	buy_btn.pressed.connect(_on_buy_clicked.bind(listing_id, str(cat_item.get("name", "Item")), price))
+	bottom_hbox.add_child(buy_btn)
+
+	return card
+
+
+func _on_buy_clicked(listing_id: int, item_name: String, price: int) -> void:
+	var api = _get_api()
+	if not api or not api.has_token():
+		show_status("Please login to purchase items", true)
+		return
+
+	show_status("Purchasing '%s' for %d CR..." % [item_name, price])
+	var res: Dictionary = await EconomyApiClient.purchase_listing(api, listing_id)
+	if res.ok:
+		show_status("Successfully purchased '%s'! Item added to inventory." % item_name)
+		item_purchased.emit(listing_id)
+		refresh_all()
+	else:
+		show_status("Purchase failed: " + res.detail, true)

scripts/smoke_test_economy_client.gd

@@ -0,0 +1,44 @@
+extends SceneTree
+## Headless smoke test for EconomyApiClient.
+
+func _init() -> void:
+	print("[SMOKE] Starting EconomyApiClient smoke test...")
+
+	var api_script = load("res://scripts/api_client.gd")
+	if not api_script:
+		printerr("[FAIL] Could not load api_client.gd")
+		quit(1)
+		return
+
+	var api: Node = api_script.new()
+	root.add_child(api)
+
+	# Verify idempotency key generation
+	var key1: String = EconomyApiClient.generate_idempotency_key()
+	var key2: String = EconomyApiClient.generate_idempotency_key()
+	assert(key1 != "", "Key should not be empty")
+	assert(key1 != key2, "Keys should be unique")
+	print("[PASS] Idempotency key generation: ", key1)
+
+	# Verify method existence on EconomyApiClient
+	var client = EconomyApiClient.new()
+	assert(client.has_method("get_wallet"), "Missing get_wallet")
+	assert(client.has_method("get_wallet_transactions"), "Missing get_wallet_transactions")
+	assert(client.has_method("purchase_credits"), "Missing purchase_credits")
+	assert(client.has_method("get_catalog_items"), "Missing get_catalog_items")
+	assert(client.has_method("create_catalog_item"), "Missing create_catalog_item")
+	assert(client.has_method("create_listing"), "Missing create_listing")
+	assert(client.has_method("search_listings"), "Missing search_listings")
+	assert(client.has_method("get_listing"), "Missing get_listing")
+	assert(client.has_method("update_listing"), "Missing update_listing")
+	assert(client.has_method("delist_listing"), "Missing delist_listing")
+	assert(client.has_method("purchase_listing"), "Missing purchase_listing")
+	assert(client.has_method("get_purchases"), "Missing get_purchases")
+	assert(client.has_method("get_creator_balance"), "Missing get_creator_balance")
+	assert(client.has_method("request_payout"), "Missing request_payout")
+	assert(client.has_method("get_payouts"), "Missing get_payouts")
+	print("[PASS] All EconomyApiClient methods verified")
+
+	api.queue_free()
+	print("[SMOKE] EconomyApiClient smoke test PASSED")
+	quit(0)

scripts/smoke_test_marketplace_ui.gd

@@ -0,0 +1,72 @@
+extends SceneTree
+## Headless smoke test for MarketplaceUI scene and script.
+
+func _initialize() -> void:
+	_run()
+
+func _run() -> void:
+	await process_frame
+	print("[SMOKE] Starting MarketplaceUI smoke test...")
+
+	var scene = load("res://scenes/marketplace_ui.tscn")
+	if not scene:
+		printerr("[FAIL] Could not load scenes/marketplace_ui.tscn")
+		quit(1)
+		return
+
+	var ui: Control = scene.instantiate()
+	root.add_child(ui)
+	await process_frame
+
+	# Verify onready nodes
+	assert(ui.back_button != null, "Missing back_button")
+	assert(ui.refresh_button != null, "Missing refresh_button")
+	assert(ui.balance_label != null, "Missing balance_label")
+	assert(ui.status_label != null, "Missing status_label")
+	assert(ui.search_edit != null, "Missing search_edit")
+	assert(ui.type_option != null, "Missing type_option")
+	assert(ui.min_price_edit != null, "Missing min_price_edit")
+	assert(ui.max_price_edit != null, "Missing max_price_edit")
+	assert(ui.search_btn != null, "Missing search_btn")
+	assert(ui.listings_container != null, "Missing listings_container")
+
+	# Verify type options populated
+	assert(ui.type_option.item_count >= 4, "Type options not populated")
+
+	# Test rendering empty listings
+	ui.render_listings([])
+	assert(ui.listings_container.get_child_count() == 1, "Should show empty notice")
+
+	# Test rendering sample listings
+	var sample_listings = [
+		{
+			"id": 10,
+			"price": 200,
+			"seller_username": "merchant_bob",
+			"catalog_item": {
+				"name": "Wizard Robe",
+				"item_type": "avatar_item",
+				"description": "Flowing velvet robe"
+			}
+		},
+		{
+			"id": 11,
+			"price": 500,
+			"seller_username": "dungeon_master",
+			"catalog_item": {
+				"name": "Castle Map",
+				"item_type": "asset",
+				"description": "Detailed 3D fortress map"
+			}
+		}
+	]
+	ui.render_listings(sample_listings)
+	assert(ui.listings_container.get_child_count() == 2, "Should render 2 listing cards")
+
+	# Verify signals
+	assert(ui.has_signal("back_requested"), "Missing back_requested signal")
+	assert(ui.has_signal("item_purchased"), "Missing item_purchased signal")
+
+	ui.queue_free()
+	print("[SMOKE] MarketplaceUI smoke test PASSED")
+	quit(0)

scripts/smoke_test_wallet_ui.gd

@@ -0,0 +1,72 @@
+extends SceneTree
+## Headless smoke test for WalletUI scene and script.
+
+func _initialize() -> void:
+	_run()
+
+func _run() -> void:
+	await process_frame
+	print("[SMOKE] Starting WalletUI smoke test...")
+
+	var scene = load("res://scenes/wallet_ui.tscn")
+	if not scene:
+		printerr("[FAIL] Could not load scenes/wallet_ui.tscn")
+		quit(1)
+		return
+
+	var ui: Control = scene.instantiate()
+	root.add_child(ui)
+	await process_frame
+
+	# Verify onready nodes
+	assert(ui.back_button != null, "Missing back_button")
+	assert(ui.refresh_button != null, "Missing refresh_button")
+	assert(ui.balance_label != null, "Missing balance_label")
+	assert(ui.buy_100_btn != null, "Missing buy_100_btn")
+	assert(ui.buy_500_btn != null, "Missing buy_500_btn")
+	assert(ui.buy_1000_btn != null, "Missing buy_1000_btn")
+	assert(ui.buy_5000_btn != null, "Missing buy_5000_btn")
+	assert(ui.tx_container != null, "Missing tx_container")
+	assert(ui.prev_page_btn != null, "Missing prev_page_btn")
+	assert(ui.next_page_btn != null, "Missing next_page_btn")
+	assert(ui.page_label != null, "Missing page_label")
+
+	# Test rendering empty transactions
+	ui.render_transactions([])
+	assert(ui.tx_container.get_child_count() == 1, "Should have 1 empty notice child")
+
+	# Test rendering sample transactions
+	var sample_txs = [
+		{
+			"id": 1,
+			"created_at": "2026-09-15T12:00:00Z",
+			"type": "credit_purchase",
+			"amount": 500,
+			"balance_after": 500,
+			"reference_type": "payment",
+			"reference_id": "sess_123"
+		},
+		{
+			"id": 2,
+			"created_at": "2026-09-15T12:15:00Z",
+			"type": "marketplace_purchase",
+			"amount": -200,
+			"balance_after": 300,
+			"reference_type": "marketplace_listing",
+			"reference_id": "45"
+		}
+	]
+	ui.render_transactions(sample_txs)
+	assert(ui.tx_container.get_child_count() == 2, "Should have 2 transaction rows")
+
+	# Test paging logic
+	ui.total_tx_count = 45
+	ui.current_page = 0
+	ui._update_paging_controls()
+	assert(ui.prev_page_btn.disabled == true, "Prev should be disabled on page 0")
+	assert(ui.next_page_btn.disabled == false, "Next should be enabled on page 0")
+	assert("Page 1 of 3" in ui.page_label.text, "Page label text mismatch")
+
+	ui.queue_free()
+	print("[SMOKE] WalletUI smoke test PASSED")
+	quit(0)

scripts/wallet_ui.gd

@@ -0,0 +1,222 @@
+extends Control
+class_name WalletUI
+## Wallet & Transaction History UI panel.
+##
+## Displays:
+## - Current Credit balance
+## - Credit pack quick purchases (100, 500, 1000, 5000 CR)
+## - Paged ledger transaction history with status/amounts/references
+##
+## docs/planning/economy.md US-6 (task 34c725431645).
+
+signal back_requested
+
+@onready var back_button: Button = $VBox/HeaderHBox/BackButton
+@onready var refresh_button: Button = $VBox/HeaderHBox/RefreshButton
+@onready var status_label: Label = $VBox/StatusLabel
+
+@onready var balance_label: Label = $VBox/BalanceCard/Margin/HBox/BalanceLabel
+@onready var buy_100_btn: Button = $VBox/BalanceCard/Margin/HBox/PacksHBox/Buy100Btn
+@onready var buy_500_btn: Button = $VBox/BalanceCard/Margin/HBox/PacksHBox/Buy500Btn
+@onready var buy_1000_btn: Button = $VBox/BalanceCard/Margin/HBox/PacksHBox/Buy1000Btn
+@onready var buy_5000_btn: Button = $VBox/BalanceCard/Margin/HBox/PacksHBox/Buy5000Btn
+
+@onready var tx_container: VBoxContainer = $VBox/LedgerSection/Scroll/TxList
+@onready var prev_page_btn: Button = $VBox/LedgerSection/PagingHBox/PrevPageBtn
+@onready var next_page_btn: Button = $VBox/LedgerSection/PagingHBox/NextPageBtn
+@onready var page_label: Label = $VBox/LedgerSection/PagingHBox/PageLabel
+
+var _api_client: Node = null
+var current_page: int = 0
+const PAGE_SIZE: int = 20
+var total_tx_count: int = 0
+
+
+func _ready() -> void:
+	_api_client = _get_api()
+	_wire_signals()
+	if _api_client != null and _api_client.has_token():
+		refresh_all()
+
+
+func _get_api() -> Node:
+	if has_node("/root/ApiClient"):
+		return get_node("/root/ApiClient")
+	return null
+
+
+func _wire_signals() -> void:
+	if back_button and not back_button.pressed.is_connected(_on_back_pressed):
+		back_button.pressed.connect(_on_back_pressed)
+	if refresh_button and not refresh_button.pressed.is_connected(refresh_all):
+		refresh_button.pressed.connect(refresh_all)
+
+	if buy_100_btn and not buy_100_btn.pressed.is_connected(_buy_pack.bind(100)):
+		buy_100_btn.pressed.connect(_buy_pack.bind(100))
+	if buy_500_btn and not buy_500_btn.pressed.is_connected(_buy_pack.bind(500)):
+		buy_500_btn.pressed.connect(_buy_pack.bind(500))
+	if buy_1000_btn and not buy_1000_btn.pressed.is_connected(_buy_pack.bind(1000)):
+		buy_1000_btn.pressed.connect(_buy_pack.bind(1000))
+	if buy_5000_btn and not buy_5000_btn.pressed.is_connected(_buy_pack.bind(5000)):
+		buy_5000_btn.pressed.connect(_buy_pack.bind(5000))
+
+	if prev_page_btn and not prev_page_btn.pressed.is_connected(_on_prev_page):
+		prev_page_btn.pressed.connect(_on_prev_page)
+	if next_page_btn and not next_page_btn.pressed.is_connected(_on_next_page):
+		next_page_btn.pressed.connect(_on_next_page)
+
+
+func _on_back_pressed() -> void:
+	back_requested.emit()
+
+
+func show_status(text: String, is_error: bool = false) -> void:
+	if not status_label:
+		return
+	status_label.text = text
+	if is_error:
+		status_label.add_theme_color_override("font_color", Color(1.0, 0.3, 0.3))
+	else:
+		status_label.add_theme_color_override("font_color", Color(0.3, 0.9, 0.3))
+
+
+func refresh_all() -> void:
+	refresh_wallet()
+	refresh_transactions()
+
+
+func refresh_wallet() -> void:
+	var api = _get_api()
+	if not api or not api.has_token():
+		return
+	var res: Dictionary = await EconomyApiClient.get_wallet(api)
+	if res.ok and res.data is Dictionary:
+		var balance: int = int(res.data.get("balance", 0))
+		if balance_label:
+			balance_label.text = "%d CR" % balance
+	else:
+		show_status("Failed to fetch wallet: " + res.detail, true)
+
+
+func refresh_transactions() -> void:
+	var api = _get_api()
+	if not api or not api.has_token():
+		return
+	var offset: int = current_page * PAGE_SIZE
+	var res: Dictionary = await EconomyApiClient.get_wallet_transactions(api, PAGE_SIZE, offset)
+	if res.ok and res.data is Dictionary:
+		var items: Array = res.data.get("items", [])
+		total_tx_count = int(res.data.get("total", 0))
+		render_transactions(items)
+		_update_paging_controls()
+	else:
+		show_status("Failed to fetch transactions: " + res.detail, true)
+
+
+func _buy_pack(credits: int) -> void:
+	var api = _get_api()
+	if not api or not api.has_token():
+		show_status("Please login to purchase Credits", true)
+		return
+	show_status("Processing purchase of %d Credits..." % credits)
+	var res: Dictionary = await EconomyApiClient.purchase_credits(api, credits)
+	if res.ok and res.data is Dictionary:
+		var new_bal: int = int(res.data.get("new_balance", 0))
+		if balance_label:
+			balance_label.text = "%d CR" % new_bal
+		show_status("Successfully purchased %d Credits! Balance: %d CR" % [credits, new_bal])
+		refresh_transactions()
+	else:
+		show_status("Purchase failed: " + res.detail, true)
+
+
+func render_transactions(tx_list: Array) -> void:
+	if not tx_container:
+		return
+	for c in tx_container.get_children():
+		tx_container.remove_child(c)
+		c.queue_free()
+
+	if tx_list.is_empty():
+		var empty_lbl := Label.new()
+		empty_lbl.text = "No transactions found."
+		empty_lbl.add_theme_color_override("font_color", Color(0.6, 0.6, 0.6))
+		tx_container.add_child(empty_lbl)
+		return
+
+	for tx in tx_list:
+		if not tx is Dictionary:
+			continue
+		var row := PanelContainer.new()
+		var hbox := HBoxContainer.new()
+		hbox.add_theme_constant_override("separation", 12)
+		row.add_child(hbox)
+
+		var date_str: String = str(tx.get("created_at", ""))
+		if date_str.length() > 19:
+			date_str = date_str.substr(0, 19).replace("T", " ")
+		var date_lbl := Label.new()
+		date_lbl.text = date_str
+		date_lbl.custom_minimum_size = Vector2(140, 0)
+		date_lbl.add_theme_color_override("font_color", Color(0.7, 0.7, 0.7))
+		hbox.add_child(date_lbl)
+
+		var type_lbl := Label.new()
+		type_lbl.text = str(tx.get("type", "")).replace("_", " ").capitalize()
+		type_lbl.custom_minimum_size = Vector2(160, 0)
+		hbox.add_child(type_lbl)
+
+		var amount: int = int(tx.get("amount", 0))
+		var amt_lbl := Label.new()
+		if amount > 0:
+			amt_lbl.text = "+%d CR" % amount
+			amt_lbl.add_theme_color_override("font_color", Color(0.2, 0.9, 0.2))
+		else:
+			amt_lbl.text = "%d CR" % amount
+			amt_lbl.add_theme_color_override("font_color", Color(0.9, 0.3, 0.3))
+		amt_lbl.custom_minimum_size = Vector2(100, 0)
+		hbox.add_child(amt_lbl)
+
+		var bal_lbl := Label.new()
+		bal_lbl.text = "Bal: %s CR" % str(tx.get("balance_after", 0))
+		bal_lbl.custom_minimum_size = Vector2(100, 0)
+		bal_lbl.add_theme_color_override("font_color", Color(0.8, 0.8, 0.8))
+		hbox.add_child(bal_lbl)
+
+		var ref_lbl := Label.new()
+		var ref_type: String = str(tx.get("reference_type", ""))
+		var ref_id: String = str(tx.get("reference_id", ""))
+		if ref_type != "":
+			ref_lbl.text = "%s #%s" % [ref_type, ref_id]
+		else:
+			ref_lbl.text = "-"
+		ref_lbl.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+		ref_lbl.add_theme_color_override("font_color", Color(0.5, 0.5, 0.5))
+		hbox.add_child(ref_lbl)
+
+		tx_container.add_child(row)
+
+
+func _update_paging_controls() -> void:
+	var total_pages: int = int(ceil(float(total_tx_count) / float(PAGE_SIZE)))
+	if total_pages < 1:
+		total_pages = 1
+	if page_label:
+		page_label.text = "Page %d of %d" % [current_page + 1, total_pages]
+	if prev_page_btn:
+		prev_page_btn.disabled = current_page <= 0
+	if next_page_btn:
+		next_page_btn.disabled = current_page >= total_pages - 1
+
+
+func _on_prev_page() -> void:
+	if current_page > 0:
+		current_page -= 1
+		refresh_transactions()
+
+
+func _on_next_page() -> void:
+	var total_pages: int = int(ceil(float(total_tx_count) / float(PAGE_SIZE)))
+	if current_page < total_pages - 1:
+		current_page += 1
+		refresh_transactions()