Improves cart addition logic and library loading

Eliminates redundant cart item quantity merging to prevent overcounting
and ensures the payment library loads with the client key after mount.
These updates enhance reliability of cart handling and payment setup.

Author: aggre

src/Pay.vue

@@ -71,6 +71,7 @@ import { Strings } from './i18n'
 import PosMp4 from './images/pos-terminal.mp4'
 import { Signer } from 'ethers'
 import { PluginId } from './constants'
+import { loadLibrary } from './utils'
 
 const props = defineProps<{
   cart?: boolean
@@ -105,6 +106,11 @@ let signer: Signer | undefined
 
 onMounted(async () => {
   i18n.value = i18nBase(navigator.languages)
+
+  whenDefined(import.meta.env.PUBLIC_POP_CLIENT_KEY, (clientKey) => {
+    loadLibrary({ clientKey })
+  })
+
   const { connection } = await import('@devprotocol/clubs-core/connection')
 
   connection().account.subscribe(async (acc) => {

src/api/add-cart.ts

@@ -8,7 +8,7 @@ import {
 import { bytes32Hex, ClubsOffering } from '@devprotocol/clubs-core'
 import { verify } from '../utils/account'
 import { CartItem } from '../types'
-import { getCartItem, getLatestSession, updateCart } from '../db/cart'
+import { getLatestSession, updateCart } from '../db/cart'
 import { headers } from '../fixtures/url/json'
 
 /**
@@ -70,20 +70,14 @@ export const addCartHandler: ({
       getLatestSession({ scope, eoa: user }).catch((err) => new Error(err)),
     )
 
-    const existingItem = await whenNotErrorAll(
-      [props, eoa, session],
-      ([{ payload }, _eoa, _session]) =>
-        getCartItem({ scope, eoa: _eoa, payload, session: _session }),
-    )
-
     const item = whenNotErrorAll(
-      [eoa, props, existingItem, session, exists],
-      ([_eoa, _props, _existingItem, _session]) =>
+      [eoa, props, session, exists],
+      ([_eoa, _props, _session]) =>
         ({
           scope,
           eoa: _eoa,
           payload: _props.payload,
-          quantity: _props.quantity + (_existingItem?.quantity ?? 0),
+          quantity: _props.quantity,
           session: _session,
         }) satisfies CartItem,
     )