feat: use nip04 for encryption and decryption of userData to store on blossom server

src/store/actionTypes.ts

@@ -18,3 +18,4 @@ export const SET_RELAY_MAP_UPDATED = 'SET_RELAY_MAP_UPDATED'
 
 export const UPDATE_USER_APP_DATA = 'UPDATE_USER_APP_DATA'
 export const UPDATE_PROCESSED_GIFT_WRAPS = 'UPDATE_PROCESSED_GIFT_WRAPS'
+export const SET_D_TAG_FOR_APP_DATA = 'SET_D_TAG_FOR_APP_DATA'

src/store/userAppData/action.ts

@@ -1,6 +1,10 @@
 import { UserAppData } from '../../types'
 import * as ActionTypes from '../actionTypes'
-import { UpdateProcessedGiftWraps, UpdateUserAppData } from './types'
+import {
+  SetDTagForAppData,
+  UpdateProcessedGiftWraps,
+  UpdateUserAppData
+} from './types'
 
 export const updateUserAppData = (payload: UserAppData): UpdateUserAppData => ({
   type: ActionTypes.UPDATE_USER_APP_DATA,
@@ -13,3 +17,8 @@ export const updateProcessedGiftWraps = (
   type: ActionTypes.UPDATE_PROCESSED_GIFT_WRAPS,
   payload
 })
+
+export const setDTagForAppData = (payload: string): SetDTagForAppData => ({
+  type: ActionTypes.SET_D_TAG_FOR_APP_DATA,
+  payload
+})

src/store/userAppData/reducer.ts

@@ -24,6 +24,12 @@ const reducer = (
         processedGiftWraps: action.payload
       }
 
+    case ActionTypes.SET_D_TAG_FOR_APP_DATA:
+      return {
+        ...state,
+        dTag: action.payload
+      }
+
     case ActionTypes.RESTORE_STATE:
       return action.payload.userAppData || null
 

src/store/userAppData/types.ts

@@ -12,7 +12,13 @@ export interface UpdateProcessedGiftWraps {
   payload: string[]
 }
 
+export interface SetDTagForAppData {
+  type: typeof ActionTypes.SET_D_TAG_FOR_APP_DATA
+  payload: string
+}
+
 export type UserAppDataDispatchTypes =
   | UpdateUserAppData
   | UpdateProcessedGiftWraps
+  | SetDTagForAppData
   | RestoreState

src/types/core.ts

@@ -43,6 +43,7 @@ export interface UserAppData {
   sigits: { [key: string]: Meta } // key will be id of create signature
   processedGiftWraps: string[] // an array of ids of processed gift wrapped events
   keyPair?: Keys // this key pair is used for blossom requests authentication
+  dTag?: string // this will be used for d tag in 30078 kind of events
   blossomUrls: string[] // array for storing Urls for the files that stores all the sigits and processedGiftWraps on blossom
 }
 

src/utils/nostr.ts

@@ -11,6 +11,7 @@ import {
   getEventHash,
   getPublicKey,
   kinds,
+  nip04,
   nip19,
   nip44,
   verifyEvent
@@ -23,6 +24,7 @@ import {
   relayController
 } from '../controllers'
 import {
+  setDTagForAppData,
   updateProcessedGiftWraps,
   updateUserAppData as updateUserAppDataAction
 } from '../store/actions'
@@ -30,10 +32,54 @@ import { AuthState, Keys } from '../store/auth/types'
 import { RelaysState } from '../store/relays/types'
 import store from '../store/store'
 import { Meta, SignedEvent, UserAppData } from '../types'
-import { getHash } from './hash'
+import { getDefaultRelayMap } from './relays'
 import { parseJson, removeLeadingSlash } from './string'
 import { timeout } from './utils'
-import { getDefaultRelayMap } from './relays'
+
+/**
+ * Generates a `d` tag for userAppData
+ */
+const getDTagForUserAppData = async (): Promise<string | null> => {
+  const isLoggedIn = store.getState().auth?.loggedIn
+  const pubkey = store.getState().auth?.usersPubkey
+
+  if (!isLoggedIn || !pubkey) {
+    throw new Error(
+      'For generating d tag user must be logged in and a valid pubkey should exists in app Store'
+    )
+  }
+
+  let dTag = store.getState().userAppData?.dTag
+
+  // if dTag is found in redux store then just return that
+  if (dTag) return dTag
+
+  // dTag not found is redux store. Generate it.
+  const unsignedEvent: UnsignedEvent = {
+    kind: kinds.ShortTextNote,
+    pubkey: pubkey,
+    created_at: 0,
+    tags: [],
+    content: `938_${pubkey}`
+  }
+
+  const nostrController = NostrController.getInstance()
+  const signedEvent = await nostrController
+    .signEvent(unsignedEvent)
+    .catch((err) => {
+      console.error('Failed to sign event for dTag', err)
+      toast.error(err.message || err)
+      return null
+    })
+  if (!signedEvent) return null
+
+  dTag = signedEvent.sig
+
+  // save dTag in redux store
+  store.dispatch(setDTagForAppData(dTag))
+
+  return dTag
+}
 
 /**
  * @param hexKey hex private or public key
@@ -377,13 +423,13 @@ export const getUsersAppData = async (): Promise<UserAppData | null> => {
   }
 
   // Generate an identifier for the user's nip78
-  const hash = await getHash('938' + usersPubkey)
+  const dTag = await getDTagForUserAppData()
-  if (!hash) return null
+  if (!dTag) return null
 
   // Define a filter for fetching events
   const filter: Filter = {
     kinds: [kinds.Application],
-    '#d': [hash]
+    '#d': [dTag]
   }
 
   const encryptedContent = await relayController
@@ -578,14 +624,14 @@ export const updateUsersAppData = async (meta: Meta) => {
   if (!encryptedContent) return null
 
   // generate the identifier for user's appData event
-  const hash = await getHash('938' + usersPubkey)
+  const dTag = await getDTagForUserAppData()
-  if (!hash) return null
+  if (!dTag) return null
 
   const updatedEvent: UnsignedEvent = {
     kind: kinds.Application,
     pubkey: usersPubkey!,
     created_at: unixNow(),
-    tags: [['d', hash]],
+    tags: [['d', dTag]],
     content: encryptedContent
   }
 
@@ -693,9 +739,10 @@ const uploadUserAppDataToBlossom = async (
   // Convert the private key from hex to bytes
   const secretKey = hexToBytes(privateKey)
   // Encrypt the JSON string using the secret key
-  const encrypted = nip44.v2.encrypt(
+  const encrypted = await nip04.encrypt(
-    stringified,
+    secretKey,
-    nip44ConversationKey(secretKey, getPublicKey(secretKey))
+    getPublicKey(secretKey),
+    stringified
   )
 
   // Create a blob from the encrypted data
@@ -788,10 +835,7 @@ const getUserAppDataFromBlossom = async (url: string, privateKey: string) => {
   const pubkey = getPublicKey(secret)
 
   // Decrypt the encrypted data using the secret and public key
-  const decrypted = nip44.v2.decrypt(
+  const decrypted = await nip04.decrypt(secret, pubkey, encrypted)
-    encrypted,
-    nip44ConversationKey(secret, pubkey)
-  )
 
   // Parse the decrypted JSON content
   const parsedContent = await parseJson<{