src/components/ModCard.tsx

@@ -5,8 +5,7 @@ import { handleModImageError } from '../utils'
 import { ModDetails } from 'types'
 import { getModPageRoute } from 'routes'
 import { kinds, nip19 } from 'nostr-tools'
-import { useDidMount, useReactions } from 'hooks'
+import { useDidMount, useNDKContext, useReactions } from 'hooks'
-import { RelayController } from 'controllers'
 import { toast } from 'react-toastify'
 import { useComments } from 'hooks/useComments'
 
@@ -19,10 +18,10 @@ export const ModCard = React.memo((props: ModDetails) => {
     eTag: props.id,
     aTag: props.aTag
   })
+  const { getTotalZapAmount } = useNDKContext()
 
   useDidMount(() => {
-    RelayController.getInstance()
+    getTotalZapAmount(props.author, props.id, props.aTag)
-      .getTotalZapAmount(props.author, props.id, props.aTag)
       .then((res) => {
         setTotalZappedAmount(res.accumulatedZapAmount)
       })

src/contexts/NDKContext.tsx

@@ -5,7 +5,8 @@ import NDK, {
   NDKKind,
   NDKRelaySet,
   NDKSubscriptionCacheUsage,
-  NDKUser
+  NDKUser,
+  zapInvoiceFromEvent
 } from '@nostr-dev-kit/ndk'
 import NDKCacheAdapterDexie from '@nostr-dev-kit/ndk-cache-dexie'
 import { MOD_FILTER_LIMIT, T_TAG_VALUE } from 'constants.ts'
@@ -36,16 +37,25 @@ interface NDKContextType {
   fetchEvents: (filter: NDKFilter) => Promise<NDKEvent[]>
   fetchEvent: (filter: NDKFilter) => Promise<NDKEvent | null>
   fetchEventsFromUserRelays: (
-    filter: NDKFilter,
+    filter: NDKFilter | NDKFilter[],
     hexKey: string,
     userRelaysType: UserRelaysType
   ) => Promise<NDKEvent[]>
   fetchEventFromUserRelays: (
-    filter: NDKFilter,
+    filter: NDKFilter | NDKFilter[],
     hexKey: string,
     userRelaysType: UserRelaysType
   ) => Promise<NDKEvent | null>
   findMetadata: (pubkey: string) => Promise<UserProfile>
+  getTotalZapAmount: (
+    user: string,
+    eTag: string,
+    aTag?: string,
+    currentLoggedInUser?: string
+  ) => Promise<{
+    accumulatedZapAmount: number
+    hasZapped: boolean
+  }>
 }
 
 // Create the context with an initial value of `null`
@@ -218,10 +228,10 @@ export const NDKContextProvider = ({ children }: { children: ReactNode }) => {
    * @returns  A promise that resolves with an array of events.
    */
   const fetchEventsFromUserRelays = async (
-    filter: NDKFilter,
+    filter: NDKFilter | NDKFilter[],
     hexKey: string,
     userRelaysType: UserRelaysType
-  ) => {
+  ): Promise<NDKEvent[]> => {
     // Find the user's relays.
     const relayUrls = await getRelayListForUser(hexKey, ndk)
       .then((ndkRelayList) => {
@@ -266,7 +276,7 @@ export const NDKContextProvider = ({ children }: { children: ReactNode }) => {
    * @returns  A promise that resolves to the fetched event or null if the operation fails.
    */
   const fetchEventFromUserRelays = async (
-    filter: NDKFilter,
+    filter: NDKFilter | NDKFilter[],
     hexKey: string,
     userRelaysType: UserRelaysType
   ) => {
@@ -296,6 +306,52 @@ export const NDKContextProvider = ({ children }: { children: ReactNode }) => {
     return userProfile
   }
 
+  const getTotalZapAmount = async (
+    user: string,
+    eTag: string,
+    aTag?: string,
+    currentLoggedInUser?: string
+  ) => {
+    const filters: NDKFilter[] = [
+      {
+        kinds: [NDKKind.Zap],
+        '#e': [eTag],
+        '#p': [user]
+      }
+    ]
+
+    if (aTag) {
+      filters.push({
+        kinds: [NDKKind.Zap],
+        '#a': [aTag],
+        '#p': [user]
+      })
+    }
+
+    const zapEvents = await fetchEventsFromUserRelays(
+      filters,
+      user,
+      UserRelaysType.Read
+    )
+
+    let accumulatedZapAmount = 0
+    let hasZapped = false
+
+    zapEvents.forEach((zap) => {
+      const zapInvoice = zapInvoiceFromEvent(zap)
+      if (zapInvoice) {
+        accumulatedZapAmount += Math.round(zapInvoice.amount / 1000)
+
+        if (!hasZapped) hasZapped = zapInvoice.zappee === currentLoggedInUser
+      }
+    })
+
+    return {
+      accumulatedZapAmount,
+      hasZapped
+    }
+  }
+
   return (
     <NDKContext.Provider
       value={{
@@ -305,7 +361,8 @@ export const NDKContextProvider = ({ children }: { children: ReactNode }) => {
         fetchEvent,
         fetchEventsFromUserRelays,
         fetchEventFromUserRelays,
-        findMetadata
+        findMetadata,
+        getTotalZapAmount
       }}
     >
       {children}

src/controllers/relay.ts

@@ -1,11 +1,5 @@
-import { Event, Filter, kinds, nip57, Relay } from 'nostr-tools'
+import { Event, Relay } from 'nostr-tools'
-import {
+import { log, LogType, normalizeWebSocketURL, timeout } from '../utils'
-  extractZapAmount,
-  log,
-  LogType,
-  normalizeWebSocketURL,
-  timeout
-} from '../utils'
 import { MetadataController, UserRelaysType } from './metadata'
 
 /**
@@ -371,122 +365,4 @@ export class RelayController {
     // Return the list of relay URLs where the event was successfully published
     return publishedOnRelays
   }
-
-  getTotalZapAmount = async (
-    user: string,
-    eTag: string,
-    aTag?: string,
-    currentLoggedInUser?: string
-  ) => {
-    const metadataController = await MetadataController.getInstance()
-
-    const relayUrls = await metadataController.findUserRelays(
-      user,
-      UserRelaysType.Read
-    )
-
-    const appRelay = import.meta.env.VITE_APP_RELAY
-    if (!relayUrls.includes(appRelay)) {
-      relayUrls.push(appRelay)
-    }
-
-    // Connect to all specified relays
-    const relayPromises = relayUrls.map((relayUrl) =>
-      this.connectRelay(relayUrl)
-    )
-
-    // Use Promise.allSettled to wait for all promises to settle
-    const results = await Promise.allSettled(relayPromises)
-
-    // Extract non-null values from fulfilled promises in a single pass
-    const relays = results.reduce<Relay[]>((acc, result) => {
-      if (result.status === 'fulfilled') {
-        const value = result.value
-        if (value) {
-          acc.push(value)
-        }
-      }
-      return acc
-    }, [])
-
-    let accumulatedZapAmount = 0
-    let hasZapped = false
-
-    const eventIds = new Set<string>() // To keep track of event IDs and avoid duplicates
-
-    const filters: Filter[] = [
-      {
-        kinds: [kinds.Zap],
-        '#e': [eTag]
-      }
-    ]
-
-    if (aTag) {
-      filters.push({
-        kinds: [kinds.Zap],
-        '#a': [aTag]
-      })
-    }
-
-    // Create a promise for each relay subscription
-    const subPromises = relays.map((relay) => {
-      return new Promise<void>((resolve) => {
-        // Subscribe to the relay with the specified filter
-        const sub = relay.subscribe(filters, {
-          // Handle incoming events
-          onevent: (e) => {
-            // Add the event to the array if it's not a duplicate
-            if (!eventIds.has(e.id)) {
-              eventIds.add(e.id) // Record the event ID
-
-              const zapRequestStr = e.tags.find(
-                (t) => t[0] === 'description'
-              )?.[1]
-              if (!zapRequestStr) return
-
-              const error = nip57.validateZapRequest(zapRequestStr)
-              if (error) return
-
-              let zapRequest: Event | null = null
-
-              try {
-                zapRequest = JSON.parse(zapRequestStr)
-              } catch (error) {
-                log(
-                  true,
-                  LogType.Error,
-                  'Error occurred in parsing zap request',
-                  error
-                )
-              }
-
-              if (!zapRequest) return
-
-              const amount = extractZapAmount(zapRequest)
-              accumulatedZapAmount += amount
-
-              if (amount > 0) {
-                if (!hasZapped) {
-                  hasZapped = zapRequest.pubkey === currentLoggedInUser
-                }
-              }
-            }
-          },
-          // Handle the End-Of-Stream (EOSE) message
-          oneose: () => {
-            sub.close() // Close the subscription
-            resolve() // Resolve the promise when EOSE is received
-          }
-        })
-      })
-    })
-
-    // Wait for all subscriptions to complete
-    await Promise.allSettled(subPromises)
-
-    return {
-      accumulatedZapAmount,
-      hasZapped
-    }
-  }
 }

src/hooks/useNDKContext.ts

@@ -9,23 +9,5 @@ export const useNDKContext = () => {
       'NDKContext should not be used in out component tree hierarchy'
     )
 
-  const {
+  return { ...ndkContext }
-    ndk,
-    fetchEvents,
-    fetchEvent,
-    fetchEventsFromUserRelays,
-    fetchEventFromUserRelays,
-    fetchMods,
-    findMetadata
-  } = ndkContext
-
-  return {
-    ndk,
-    fetchEvents,
-    fetchEvent,
-    fetchEventsFromUserRelays,
-    fetchEventFromUserRelays,
-    fetchMods,
-    findMetadata
-  }
 }

src/pages/mod/internal/comment/index.tsx

@@ -496,15 +496,14 @@ const Reactions = (props: Event) => {
 
 const Zap = (props: Event) => {
   const [isOpen, setIsOpen] = useState(false)
+  const [totalZappedAmount, setTotalZappedAmount] = useState(0)
   const [hasZapped, setHasZapped] = useState(false)
 
   const userState = useAppSelector((state) => state.user)
-
+  const { getTotalZapAmount } = useNDKContext()
-  const [totalZappedAmount, setTotalZappedAmount] = useState(0)
 
   useDidMount(() => {
-    RelayController.getInstance()
+    getTotalZapAmount(
-      .getTotalZapAmount(
       props.pubkey,
       props.id,
       undefined,

src/pages/mod/internal/zap/index.tsx

@@ -1,6 +1,5 @@
 import { ZapSplit } from 'components/Zap'
-import { RelayController } from 'controllers'
+import { useAppSelector, useDidMount, useNDKContext } from 'hooks'
-import { useAppSelector, useDidMount } from 'hooks'
 import { useState } from 'react'
 import { toast } from 'react-toastify'
 import { ModDetails } from 'types'
@@ -12,15 +11,14 @@ type ZapProps = {
 
 export const Zap = ({ modDetails }: ZapProps) => {
   const [isOpen, setIsOpen] = useState(false)
+  const [totalZappedAmount, setTotalZappedAmount] = useState(0)
   const [hasZapped, setHasZapped] = useState(false)
 
   const userState = useAppSelector((state) => state.user)
-
+  const { getTotalZapAmount } = useNDKContext()
-  const [totalZappedAmount, setTotalZappedAmount] = useState(0)
 
   useDidMount(() => {
-    RelayController.getInstance()
+    getTotalZapAmount(
-      .getTotalZapAmount(
       modDetails.author,
       modDetails.id,
       modDetails.aTag,