src/pages/create/index.tsx

@@ -421,38 +421,39 @@ export const CreatePage = () => {
     return finalZipFile
   }
 
-  // Handle file upload and further actions based on online/offline status
+  const handleOnlineFlow = async (
-  const handleFileUpload = async (file: File, arrayBuffer: ArrayBuffer) => {
+    encryptedArrayBuffer: ArrayBuffer,
-    if (await isOnline()) {
+    encryptionKey: string
-      const fileUrl = await uploadFile(file)
+  ) => {
+    const unixNow = Math.floor(Date.now() / 1000)
+    const blob = new Blob([encryptedArrayBuffer])
+    // Create a File object with the Blob data
+    const file = new File([blob], `compressed-${unixNow}.sigit`, {
+      type: 'application/sigit'
+    })
 
+    const fileUrl = await uploadFile(file)
     if (!fileUrl) return
 
-      await sendDMs(fileUrl)
+    await sendDMs(fileUrl, encryptionKey)
-      setIsLoading(false)
-
-      navigate(appPrivateRoutes.sign, { state: { arrayBuffer } })
-    } else {
-      handleOffline(file, arrayBuffer)
-    }
   }
 
   // Handle errors during file upload
   const handleUploadError = (err: any) => {
     console.log('Error in upload:>> ', err)
     setIsLoading(false)
-    toast.error(err.message || 'Error occurred in uploading zip file')
+    toast.error(err.message || 'Error occurred in uploading file')
     return null
   }
 
-  // Upload the file to the storage and send DMs to signers/viewers
+  // Upload the file to the storage
   const uploadFile = async (file: File): Promise<string | null> => {
     setIsLoading(true)
-    setLoadingSpinnerDesc('Uploading zip file to file storage.')
+    setLoadingSpinnerDesc('Uploading sigit to file storage.')
 
     const fileUrl = await uploadToFileStorage(file, nostrController)
       .then((url) => {
-        toast.success('zip file uploaded to file storage')
+        toast.success('Sigit uploaded to file storage')
         return url
       })
       .catch(handleUploadError)
@@ -461,7 +462,7 @@ export const CreatePage = () => {
   }
 
   // Send DMs to signers and viewers with the file URL
-  const sendDMs = async (fileUrl: string) => {
+  const sendDMs = async (fileUrl: string, encryptionKey: string) => {
     setLoadingSpinnerDesc('Sending DM to signers/viewers')
 
     const signers = users.filter((user) => user.role === UserRole.signer)
@@ -470,6 +471,7 @@ export const CreatePage = () => {
     if (signers.length > 0) {
       await sendDM(
         fileUrl,
+        encryptionKey,
         signers[0].pubkey,
         nostrController,
         true,
@@ -477,15 +479,31 @@ export const CreatePage = () => {
       )
     } else {
       for (const viewer of viewers) {
-        await sendDM(fileUrl, viewer.pubkey, nostrController, false, setAuthUrl)
+        await sendDM(
+          fileUrl,
+          encryptionKey,
+          viewer.pubkey,
+          nostrController,
+          false,
+          setAuthUrl
+        )
       }
     }
   }
 
   // Manage offline scenarios for signing or viewing the file
-  const handleOffline = (file: File, arrayBuffer: ArrayBuffer) => {
+  const handleOfflineFlow = async (
-    saveAs(file, 'request.sigit.zip')
+    encryptedArrayBuffer: ArrayBuffer,
-    navigate(appPrivateRoutes.sign, { state: { arrayBuffer } })
+    encryptionKey: string
+  ) => {
+    const finalZipFile = await createFinalZipFile(
+      encryptedArrayBuffer,
+      encryptionKey
+    )
+
+    if (!finalZipFile) return
+
+    saveAs(finalZipFile, 'request.sigit.zip')
   }
 
   const handleCreate = async () => {
@@ -507,25 +525,24 @@ export const CreatePage = () => {
 
     setLoadingSpinnerDesc('Generating zip file')
 
-    const arraybuffer = await generateZipFile(zip)
+    const arrayBuffer = await generateZipFile(zip)
-    if (!arraybuffer) return
+    if (!arrayBuffer) return
 
     const encryptionKey = await generateEncryptionKey()
 
     setLoadingSpinnerDesc('Encrypting zip file')
     const encryptedArrayBuffer = await encryptZipFile(
-      arraybuffer,
+      arrayBuffer,
       encryptionKey
     )
 
-    const finalZipFile = await createFinalZipFile(
+    if (await isOnline()) {
-      encryptedArrayBuffer,
+      await handleOnlineFlow(encryptedArrayBuffer, encryptionKey)
-      encryptionKey
+    } else {
-    )
+      await handleOfflineFlow(encryptedArrayBuffer, encryptionKey)
+    }
 
-    if (!finalZipFile) return
+    navigate(appPrivateRoutes.sign, { state: { arrayBuffer } })
-
-    return await handleFileUpload(finalZipFile, arraybuffer)
   }
 
   if (authUrl) {

src/pages/sign/index.tsx

@@ -42,7 +42,7 @@ export const SignPage = () => {
   const location = useLocation()
   const { arrayBuffer: decryptedArrayBuffer } = location.state || {}
 
-  const [searchParams] = useSearchParams()
+  const [searchParams, setSearchParams] = useSearchParams()
 
   const [displayInput, setDisplayInput] = useState(false)
 
@@ -160,8 +160,9 @@ export const SignPage = () => {
 
   useEffect(() => {
     const fileUrl = searchParams.get('file')
+    const key = searchParams.get('key')
 
-    if (fileUrl) {
+    if (fileUrl && key) {
       setIsLoading(true)
       setLoadingSpinnerDesc('Fetching file from file server')
 
@@ -169,13 +170,22 @@ export const SignPage = () => {
         .get(fileUrl, {
           responseType: 'arraybuffer'
         })
-        .then((res) => {
+        .then(async (res) => {
           const fileName = fileUrl.split('/').pop()
           const file = new File([res.data], fileName!)
 
-          decrypt(file).then((arrayBuffer) => {
+          const encryptedArrayBuffer = await file.arrayBuffer()
-            if (arrayBuffer) handleDecryptedArrayBuffer(arrayBuffer)
+
+          const arrayBuffer = await decryptArrayBuffer(
+            encryptedArrayBuffer,
+            key
+          ).catch((err) => {
+            console.log('err in decryption:>> ', err)
+            toast.error(err.message || 'An error occurred in decrypting file.')
+            return null
           })
+
+          if (arrayBuffer) handleDecryptedArrayBuffer(arrayBuffer)
         })
         .catch((err) => {
           console.error(`error occurred in getting file from ${fileUrl}`, err)
@@ -268,8 +278,6 @@ export const SignPage = () => {
           setAuthUrl(undefined) // Clear authentication URL
         })
 
-      console.log('encryptionKey :>> ', encryptionKey)
-
       // Return if encryption failed
       if (!encryptionKey) continue
 
@@ -438,16 +446,12 @@ export const SignPage = () => {
     setLoadingSpinnerDesc('Encrypting zip file')
     const encryptedArrayBuffer = await encryptArrayBuffer(arrayBuffer, key)
 
-    const finalZipFile = await createFinalZipFile(encryptedArrayBuffer, key)
-
-    if (!finalZipFile) return
-
     if (await isOnline()) {
-      await handleOnlineFlow(finalZipFile)
+      await handleOnlineFlow(encryptedArrayBuffer, key)
-    }
+    } else {
-
       handleDecryptedArrayBuffer(arrayBuffer).finally(() => setIsLoading(false))
     }
+  }
 
   // Read the content of the hashes.json file
   const readHashesFile = async (): Promise<string | null> => {
@@ -600,35 +604,56 @@ export const SignPage = () => {
   }
 
   // Handle the online flow: upload file and send DMs
-  const handleOnlineFlow = async (file: File) => {
+  const handleOnlineFlow = async (
-    const fileUrl = await uploadZipFile(file)
+    encryptedArrayBuffer: ArrayBuffer,
+    encryptionKey: string
+  ) => {
+    const unixNow = Math.floor(Date.now() / 1000)
+    const blob = new Blob([encryptedArrayBuffer])
+    // Create a File object with the Blob data
+    const file = new File([blob], `compressed-${unixNow}.sigit`, {
+      type: 'application/sigit'
+    })
+
+    const fileUrl = await uploadFile(file)
     if (!fileUrl) return
 
     const isLastSigner = checkIsLastSigner(signers)
 
     if (isLastSigner) {
-      await sendDMToAllUsers(fileUrl)
+      await sendDMToAllUsers(fileUrl, encryptionKey)
     } else {
-      await sendDMToNextSigner(fileUrl)
+      await sendDMToNextSigner(fileUrl, encryptionKey)
     }
 
+    // update search params with updated file url and encryption key
+    setSearchParams({
+      file: fileUrl,
+      key: encryptionKey
+    })
+
     setIsLoading(false)
   }
 
-  // Upload the zip file to file storage
+  // Handle errors during file upload
-  const uploadZipFile = async (file: File): Promise<string | null> => {
+  const handleUploadError = (err: any) => {
-    setLoadingSpinnerDesc('Uploading zip file to file storage.')
+    console.log('Error in upload:>> ', err)
+    setIsLoading(false)
+    toast.error(err.message || 'Error occurred in uploading file')
+    return null
+  }
+
+  // Upload the file to file storage
+  const uploadFile = async (file: File): Promise<string | null> => {
+    setIsLoading(true)
+    setLoadingSpinnerDesc('Uploading sigit file to file storage.')
+
     const fileUrl = await uploadToFileStorage(file, nostrController)
       .then((url) => {
-        toast.success('Zip file uploaded to file storage')
+        toast.success('Sigit uploaded to file storage')
         return url
       })
-      .catch((err) => {
+      .catch(handleUploadError)
-        console.log('Error uploading file:', err)
-        setIsLoading(false)
-        toast.error(err.message || 'Error uploading file')
-        return null
-      })
 
     return fileUrl
   }
@@ -642,7 +667,7 @@ export const SignPage = () => {
   }
 
   // Send DM to all users (signers and viewers)
-  const sendDMToAllUsers = async (fileUrl: string) => {
+  const sendDMToAllUsers = async (fileUrl: string, encryptionKey: string) => {
     const userSet = new Set<`npub1${string}`>()
 
     if (submittedBy) {
@@ -662,6 +687,7 @@ export const SignPage = () => {
     for (const user of users) {
       await sendDM(
         fileUrl,
+        encryptionKey,
         npubToHex(user)!,
         nostrController,
         false,
@@ -671,12 +697,13 @@ export const SignPage = () => {
   }
 
   // Send DM to the next signer
-  const sendDMToNextSigner = async (fileUrl: string) => {
+  const sendDMToNextSigner = async (fileUrl: string, encryptionKey: string) => {
     const usersNpub = hexToNpub(usersPubkey!)
     const signerIndex = signers.indexOf(usersNpub)
     const nextSigner = signers[signerIndex + 1]
     await sendDM(
       fileUrl,
+      encryptionKey,
       npubToHex(nextSigner)!,
       nostrController,
       true,
@@ -776,8 +803,8 @@ export const SignPage = () => {
     const finalZipFile = await createFinalZipFile(encryptedArrayBuffer, key)
 
     if (!finalZipFile) return
-
+    const unixNow = Math.floor(Date.now() / 1000)
-    saveAs(finalZipFile, 'exported.sigit.zip')
+    saveAs(finalZipFile, `exported-${unixNow}.sigit.zip`)
   }
 
   /**
@@ -915,8 +942,8 @@ export const SignPage = () => {
               </Box>
             )}
 
-            {isSignerOrCreator &&
+            {/* todo: In offline mode export sigit is not visible after last signer has signed*/}
-              signedStatus === SignedStatus.User_Is_Not_Next_Signer && (
+            {isSignerOrCreator && (
               <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
                 <Button onClick={handleExportSigit} variant="contained">
                   Export Sigit

src/utils/misc.ts

@@ -56,6 +56,7 @@ export const uploadToFileStorage = async (
 /**
  * Sends a Direct Message (DM) to a recipient, encrypting the content and handling authentication.
  * @param fileUrl The URL of the encrypted zip file to be included in the DM.
+ * @param encryptionKey The encryption key used to decrypt the zip file to be included in the DM.
  * @param pubkey The public key of the recipient.
  * @param nostrController The NostrController instance for handling authentication and encryption.
  * @param isSigner Boolean indicating whether the recipient is a signer or viewer.
@@ -63,6 +64,7 @@ export const uploadToFileStorage = async (
  */
 export const sendDM = async (
   fileUrl: string,
+  encryptionKey: string,
   pubkey: string,
   nostrController: NostrController,
   isSigner: boolean,
@@ -75,7 +77,9 @@ export const sendDM = async (
 
   const decryptionUrl = `${window.location.origin}/#${
     appPrivateRoutes.sign
-  }?file=${encodeURIComponent(fileUrl)}`
+  }?file=${encodeURIComponent(fileUrl)}&key=${encodeURIComponent(
+    encryptionKey
+  )}`
 
   const content = `${initialLine}\n\n${decryptionUrl}`