.gitea/workflows/release.yaml

@@ -29,4 +29,4 @@ jobs:
       - name: Release Build
         run: |
           npm -g install cloudron-surfer
-          surfer put --token ${{ secrets.CLOUDRON_SURFER_TOKEN }} --server sigit.io dist/* /
+          surfer put --token ${{ secrets.CLOUDRON_SURFER_TOKEN }} --server app.sigit.io dist/* /

package.json

@@ -3,7 +3,7 @@
   "private": true,
   "version": "0.0.0",
   "type": "module",
-  "homepage": "https://sigit.io/",
+  "homepage": "https://app.sigit.io/",
   "scripts": {
     "dev": "vite",
     "build": "tsc && vite build",

src/components/AppBar/AppBar.tsx

@@ -1,9 +1,13 @@
+import { Menu as MenuIcon } from '@mui/icons-material'
 import {
   AppBar as AppBarMui,
   Box,
   Button,
+  IconButton,
   Menu,
   MenuItem,
+  Tab,
+  Tabs,
   Toolbar,
   Typography
 } from '@mui/material'
@@ -15,10 +19,14 @@ import { State } from '../../store/rootReducer'
 import { Dispatch } from '../../store/store'
 import Username from '../username'
 
-import { Link, useNavigate } from 'react-router-dom'
+import { Link, useLocation, useNavigate } from 'react-router-dom'
 import nostrichAvatar from '../../assets/images/avatar.png'
 import { NostrController } from '../../controllers'
-import { appPublicRoutes, getProfileRoute } from '../../routes'
+import {
+  appPrivateRoutes,
+  appPublicRoutes,
+  getProfileRoute
+} from '../../routes'
 import {
   clearAuthToken,
   saveNsecBunkerDelegatedKey,
@@ -26,14 +34,20 @@ import {
 } from '../../utils'
 import styles from './style.module.scss'
 
+const validTabs = [appPrivateRoutes.homePage, appPrivateRoutes.decryptZip]
+
 export const AppBar = () => {
   const navigate = useNavigate()
-
+  const { pathname } = useLocation()
+  const [tabValue, setTabValue] = useState(
+    validTabs.includes(pathname) ? pathname : '/'
+  )
   const dispatch: Dispatch = useDispatch()
 
   const [username, setUsername] = useState('')
   const [userAvatar, setUserAvatar] = useState(nostrichAvatar)
   const [anchorElUser, setAnchorElUser] = useState<null | HTMLElement>(null)
+  const [anchorElNav, setAnchorElNav] = useState<null | HTMLElement>(null)
 
   const authState = useSelector((state: State) => state.auth)
   const metadataState = useSelector((state: State) => state.metadata)
@@ -52,10 +66,18 @@ export const AppBar = () => {
     setAnchorElUser(event.currentTarget)
   }
 
+  const handleOpenNavMenu = (event: React.MouseEvent<HTMLElement>) => {
+    setAnchorElNav(event.currentTarget)
+  }
+
   const handleCloseUserMenu = () => {
     setAnchorElUser(null)
   }
 
+  const handleCloseNavMenu = () => {
+    setAnchorElNav(null)
+  }
+
   const handleProfile = () => {
     const hexKey = authState?.usersPubkey
     if (hexKey) navigate(getProfileRoute(hexKey))
@@ -89,8 +111,116 @@ export const AppBar = () => {
   return (
     <AppBarMui position='fixed' className={styles.AppBar}>
       <Toolbar className={styles.toolbar}>
+        <Box sx={{ display: { xs: 'none', md: 'flex' } }}>
           <Box className={styles.logoWrapper}>
-          <img src='/logo.png' alt='Logo' onClick={() => navigate('/')} />
+            <img src="/logo.png" alt='Logo' onClick={() => navigate('/')} />
+          </Box>
+
+          {isAuthenticated && (
+            <Tabs
+              indicatorColor='secondary'
+              value={tabValue}
+              onChange={(_, value) => setTabValue(value)}
+            >
+              <Tab
+                label='Home'
+                value={appPrivateRoutes.homePage}
+                to={appPrivateRoutes.homePage}
+                component={Link}
+              />
+              <Tab
+                label='Decrypt Zip'
+                value={appPrivateRoutes.decryptZip}
+                to={appPrivateRoutes.decryptZip}
+                component={Link}
+              />
+              <Tab
+                label='Sign Document'
+                value={appPrivateRoutes.sign}
+                to={appPrivateRoutes.sign}
+                component={Link}
+              />
+            </Tabs>
+          )}
+        </Box>
+
+        <Box sx={{ flexGrow: 1, display: { xs: 'flex', md: 'none' } }}>
+          {!isAuthenticated && (
+            <Box className={styles.logoWrapper}>
+              <img
+                src="/logo.png"
+                alt='Logo'
+                onClick={() => navigate('/')}
+              />
+            </Box>
+          )}
+
+          {isAuthenticated && (
+            <>
+              <IconButton
+                size='large'
+                onClick={handleOpenNavMenu}
+                color='primary'
+              >
+                <MenuIcon />
+              </IconButton>
+
+              <Menu
+                id='menu-appbar'
+                anchorEl={anchorElNav}
+                anchorOrigin={{
+                  vertical: 'bottom',
+                  horizontal: 'left'
+                }}
+                keepMounted
+                transformOrigin={{
+                  vertical: 'top',
+                  horizontal: 'left'
+                }}
+                open={!!anchorElNav}
+                onClose={handleCloseNavMenu}
+                sx={{
+                  display: { xs: 'block', md: 'none' }
+                }}
+              >
+                <MenuItem sx={{ justifyContent: 'center' }}>
+                  <Button
+                    component={Link}
+                    to={appPrivateRoutes.homePage}
+                    onClick={handleCloseNavMenu}
+                    variant='contained'
+                    color='primary'
+                  >
+                    Home
+                  </Button>
+                </MenuItem>
+
+                <MenuItem sx={{ justifyContent: 'center' }}>
+                  <Button
+                    component={Link}
+                    to={appPrivateRoutes.decryptZip}
+                    onClick={handleCloseNavMenu}
+                    variant='contained'
+                    color='primary'
+                  >
+                    Decrypt Zip
+                  </Button>
+                </MenuItem>
+
+                <MenuItem sx={{ justifyContent: 'center' }}>
+                  <Button
+                    component={Link}
+                    to={appPrivateRoutes.sign}
+                    onClick={handleCloseNavMenu}
+                    variant='contained'
+                    color='primary'
+                  >
+                    Sign Document
+                  </Button>
+                </MenuItem>
+              </Menu>
+            </>
+          )}
         </Box>
 
         <Box className={styles.rightSideBox}>

src/pages/home/index.tsx

@@ -1,20 +1,489 @@
-import { Box, Button } from '@mui/material'
+import { Clear } from '@mui/icons-material'
+import {
+  Box,
+  Button,
+  FormControl,
+  IconButton,
+  InputLabel,
+  List,
+  ListItem,
+  ListSubheader,
+  MenuItem,
+  Select,
+  TextField,
+  Typography
+} from '@mui/material'
+import JSZip from 'jszip'
+import { MuiFileInput } from 'mui-file-input'
+import { useEffect, useState } from 'react'
+import { useSelector } from 'react-redux'
+import { Link } from 'react-router-dom'
+import { toast } from 'react-toastify'
+import placeholderAvatar from '../../assets/images/nostr-logo.jpg'
+import { LoadingSpinner } from '../../components/LoadingSpinner'
+import { MetadataController, NostrController } from '../../controllers'
+import { getProfileRoute } from '../../routes'
+import { State } from '../../store/rootReducer'
+import { ProfileMetadata } from '../../types'
+import {
+  encryptArrayBuffer,
+  generateEncryptionKey,
+  getHash,
+  pubToHex,
+  queryNip05,
+  sendDM,
+  shorten,
+  signEventForMetaFile,
+  uploadToFileStorage
+} from '../../utils'
 import styles from './style.module.scss'
-import { useNavigate } from 'react-router-dom'
-import { appPrivateRoutes } from '../../routes'
+
+enum SelectionType {
+  signer = 'Signer',
+  viewer = 'Viewer'
+}
 
 export const HomePage = () => {
-  const navigate = useNavigate()
+  const [inputValue, setInputValue] = useState('')
+  const [type, setType] = useState<SelectionType>(SelectionType.signer)
+  const [error, setError] = useState<string>()
 
-  return (
-    <Box className={styles.container}>
-      <Button
-        onClick={() => navigate(appPrivateRoutes.sign)}
-        variant='contained'
-      >
-        Sign
-      </Button>
-      <Button variant='contained'>Verify</Button>
-    </Box>
+  const [signers, setSigners] = useState<string[]>([])
+  const [viewers, setViewers] = useState<string[]>([])
+
+  const [selectedFiles, setSelectedFiles] = useState<File[]>([])
+
+  const [isLoading, setIsLoading] = useState(false)
+  const [loadingSpinnerDesc, setLoadingSpinnerDesc] = useState('')
+  const [authUrl, setAuthUrl] = useState<string>()
+
+  const usersPubkey = useSelector((state: State) => state.auth.usersPubkey)
+
+  const nostrController = NostrController.getInstance()
+
+  const handleAddClick = async () => {
+    setError(undefined)
+
+    const addPubkey = (pubkey: string) => {
+      const addElement = (prev: string[]) => {
+        // if key is already in the list just return that
+        if (prev.includes(pubkey)) return prev
+
+        return [...prev, pubkey]
+      }
+      if (type === SelectionType.signer) {
+        setSigners(addElement)
+      } else {
+        setViewers(addElement)
+      }
+    }
+
+    if (inputValue.startsWith('npub')) {
+      const pubkey = await pubToHex(inputValue)
+      if (pubkey) {
+        addPubkey(pubkey)
+        setInputValue('')
+      } else {
+        setError('Provided npub is not valid. Please enter correct npub.')
+      }
+      return
+    }
+
+    if (inputValue.includes('@')) {
+      setIsLoading(true)
+      setLoadingSpinnerDesc('Querying for nip05')
+      const nip05Profile = await queryNip05(inputValue)
+        .catch((err) => {
+          console.error(`error occurred in querying nip05: ${inputValue}`, err)
+          return null
+        })
+        .finally(() => {
+          setIsLoading(false)
+          setLoadingSpinnerDesc('')
+        })
+
+      if (nip05Profile) {
+        const pubkey = nip05Profile.pubkey
+        addPubkey(pubkey)
+        setInputValue('')
+      } else {
+        setError('Provided nip05 is not valid. Please enter correct nip05.')
+      }
+      return
+    }
+
+    setError('Invalid input! Make sure to provide correct npub or nip05.')
+  }
+
+  const handleRemove = (pubkey: string, selectionType: SelectionType) => {
+    if (selectionType === SelectionType.signer) {
+      setSigners((prev) => prev.filter((signer) => signer !== pubkey))
+    } else {
+      setViewers((prev) => prev.filter((viewer) => viewer !== pubkey))
+    }
+  }
+
+  const handleSelectFiles = (files: File[]) => {
+    setSelectedFiles((prev) => {
+      const prevFileNames = prev.map((file) => file.name)
+
+      const newFiles = files.filter(
+        (file) => !prevFileNames.includes(file.name)
+      )
+
+      return [...prev, ...newFiles]
+    })
+  }
+
+  const handleRemoveFile = (fileToRemove: File) => {
+    setSelectedFiles((prevFiles) =>
+      prevFiles.filter((file) => file.name !== fileToRemove.name)
+    )
+  }
+
+  const handleSubmit = async () => {
+    if (signers.length === 0) {
+      toast.error('No signer is provided.  At least provide one signer.')
+      return
+    }
+
+    if (viewers.length === 0) {
+      toast.error('No viewer is provided.  At least provide one viewer.')
+      return
+    }
+
+    if (selectedFiles.length === 0) {
+      toast.error('No file is provided.  At least provide one file.')
+      return
+    }
+
+    setIsLoading(true)
+    setLoadingSpinnerDesc('Generating hashes for files')
+
+    const fileHashes: { [key: string]: string } = {}
+
+    for (const file of selectedFiles) {
+      const arraybuffer = await file.arrayBuffer().catch((err) => {
+        console.log(
+          `err while getting arrayBuffer of file ${file.name} :>> `,
+          err
+        )
+        toast.error(
+          err.message || `err while getting arrayBuffer of file ${file.name}`
+        )
+        return null
+      })
+
+      if (!arraybuffer) return
+
+      const hash = await getHash(arraybuffer)
+
+      if (!hash) {
+        setIsLoading(false)
+        return
+      }
+
+      fileHashes[file.name] = hash
+    }
+
+    const zip = new JSZip()
+
+    selectedFiles.forEach((file) => {
+      zip.file(`files/${file.name}`, file)
+    })
+
+    setLoadingSpinnerDesc('Signing nostr event')
+    const signedEvent = await signEventForMetaFile(
+      signers[0],
+      fileHashes,
+      nostrController,
+      setIsLoading
+    )
+
+    if (!signedEvent) return
+
+    const meta = {
+      signers,
+      viewers,
+      fileHashes,
+      submittedBy: usersPubkey,
+      signedEvents: {
+        [signedEvent.pubkey]: JSON.stringify(signedEvent, null, 2)
+      }
+    }
+
+    try {
+      const stringifiedMeta = JSON.stringify(meta, null, 2)
+      zip.file('meta.json', stringifiedMeta)
+
+      const metaHash = await getHash(stringifiedMeta)
+      if (!metaHash) return
+
+      const metaHashJson = {
+        [usersPubkey!]: metaHash
+      }
+
+      zip.file('hashes.json', JSON.stringify(metaHashJson, null, 2))
+    } catch (err) {
+      toast.error('An error occurred in converting meta json to string')
+    }
+
+    setLoadingSpinnerDesc('Generating zip file')
+
+    const arraybuffer = await zip
+      .generateAsync({
+        type: 'arraybuffer',
+        compression: 'DEFLATE',
+        compressionOptions: {
+          level: 6
+        }
+      })
+      .catch((err) => {
+        console.log('err in zip:>> ', err)
+        setIsLoading(false)
+        toast.error(err.message || 'Error occurred in generating zip file')
+        return null
+      })
+
+    if (!arraybuffer) return
+
+    const encryptionKey = await generateEncryptionKey()
+
+    setLoadingSpinnerDesc('Encrypting zip file')
+    const encryptedArrayBuffer = await encryptArrayBuffer(
+      arraybuffer,
+      encryptionKey
+    )
+
+    const blob = new Blob([encryptedArrayBuffer])
+
+    setLoadingSpinnerDesc('Uploading zip file to file storage.')
+    const fileUrl = await uploadToFileStorage(blob, nostrController)
+      .then((url) => {
+        toast.success('zip file uploaded to file storage')
+        return url
+      })
+      .catch((err) => {
+        console.log('err in upload:>> ', err)
+        setIsLoading(false)
+        toast.error(err.message || 'Error occurred in uploading zip file')
+        return null
+      })
+
+    if (!fileUrl) return
+
+    setLoadingSpinnerDesc('Sending DM to first signer')
+    await sendDM(
+      fileUrl,
+      encryptionKey,
+      signers[0],
+      nostrController,
+      true,
+      setAuthUrl
+    )
+
+    setIsLoading(false)
+  }
+
+  if (authUrl) {
+    return (
+      <iframe
+        title='Nsecbunker auth'
+        src={authUrl}
+        width='100%'
+        height='500px'
+      />
+    )
+  }
+
+  return (
+    <>
+      {isLoading && <LoadingSpinner desc={loadingSpinnerDesc} />}
+      <Box className={styles.container}>
+        <Typography component='label' variant='h6'>
+          Select signers and viewers
+        </Typography>
+        <Box className={styles.inputBlock}>
+          <TextField
+            label='nip05 / npub'
+            value={inputValue}
+            onChange={(e) => setInputValue(e.target.value)}
+            helperText={error}
+            error={!!error}
+          />
+          <FormControl fullWidth>
+            <InputLabel id='select-type-label'>Type</InputLabel>
+            <Select
+              labelId='select-type-label'
+              id='demo-simple-select'
+              value={type}
+              label='Type'
+              onChange={(e) => setType(e.target.value as SelectionType)}
+            >
+              <MenuItem value={SelectionType.signer}>
+                {SelectionType.signer}
+              </MenuItem>
+              <MenuItem value={SelectionType.viewer}>
+                {SelectionType.viewer}
+              </MenuItem>
+            </Select>
+          </FormControl>
+
+          <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
+            <Button
+              disabled={!inputValue}
+              onClick={handleAddClick}
+              variant='contained'
+            >
+              Add
+            </Button>
+          </Box>
+        </Box>
+
+        <Typography component='label' variant='h6'>
+          Select files
+        </Typography>
+
+        <MuiFileInput
+          multiple
+          placeholder='Choose Files'
+          value={selectedFiles}
+          onChange={(value) => handleSelectFiles(value)}
+        />
+
+        <ul>
+          {selectedFiles.map((file, index) => (
+            <li key={index}>
+              <Typography component='label'>{file.name}</Typography>
+              <IconButton onClick={() => handleRemoveFile(file)}>
+                <Clear style={{ color: 'red' }} />{' '}
+              </IconButton>
+            </li>
+          ))}
+        </ul>
+
+        {signers.length > 0 && (
+          <List
+            sx={{
+              bgcolor: 'background.paper',
+              marginTop: 2
+            }}
+            subheader={
+              <ListSubheader
+                sx={{
+                  paddingBottom: 1,
+                  paddingTop: 1,
+                  fontSize: '1.5rem'
+                }}
+                className={styles.subHeader}
+              >
+                Signers
+              </ListSubheader>
+            }
+          >
+            {signers.map((signer, index) => (
+              <DisplaySignerOrViewer
+                key={`signer-${index}`}
+                pubkey={signer}
+                remove={() => handleRemove(signer, SelectionType.signer)}
+              />
+            ))}
+          </List>
+        )}
+
+        {viewers.length > 0 && (
+          <List
+            sx={{
+              bgcolor: 'background.paper',
+              marginTop: 2
+            }}
+            subheader={
+              <ListSubheader
+                sx={{
+                  paddingBottom: 1,
+                  paddingTop: 1,
+                  fontSize: '1.5rem'
+                }}
+                className={styles.subHeader}
+              >
+                Viewers
+              </ListSubheader>
+            }
+          >
+            {viewers.map((viewer, index) => (
+              <DisplaySignerOrViewer
+                key={`viewer-${index}`}
+                pubkey={viewer}
+                remove={() => handleRemove(viewer, SelectionType.viewer)}
+              />
+            ))}
+          </List>
+        )}
+
+        <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
+          <Button onClick={handleSubmit} variant='contained'>
+            Submit
+          </Button>
+        </Box>
+      </Box>
+    </>
+  )
+}
+
+type DisplaySignerOrViewerProps = {
+  pubkey: string
+  remove: () => void
+}
+
+const DisplaySignerOrViewer = ({
+  pubkey,
+  remove
+}: DisplaySignerOrViewerProps) => {
+  const [metadata, setMetadata] = useState<ProfileMetadata>()
+
+  useEffect(() => {
+    const getMetadata = async (pubkey: string) => {
+      const metadataController = new MetadataController()
+      const metadataEvent = await metadataController
+        .findMetadata(pubkey)
+        .catch((err) => {
+          console.error(
+            `error occurred in finding metadata for: ${pubkey}`,
+            err
+          )
+          return null
+        })
+
+      if (metadataEvent) {
+        const metadataContent =
+          metadataController.extractProfileMetadataContent(metadataEvent)
+        if (metadataContent) setMetadata(metadataContent)
+      }
+    }
+
+    getMetadata(pubkey)
+  }, [pubkey])
+
+  const imageLoadError = (event: any) => {
+    event.target.src = placeholderAvatar
+  }
+
+  return (
+    <ListItem sx={{ marginTop: 1 }} className={styles.listItem}>
+      <img
+        onError={imageLoadError}
+        src={metadata?.picture || placeholderAvatar}
+        alt='Profile Image'
+        className={styles.img}
+      />
+      <Link to={getProfileRoute(pubkey)}>
+        <Typography component='label' className={styles.name}>
+          {metadata?.display_name || metadata?.name || shorten(pubkey)}
+        </Typography>
+      </Link>
+      <IconButton onClick={remove}>
+        <Clear style={{ color: 'red' }} />
+      </IconButton>
+    </ListItem>
   )
 }

src/pages/home/style.module.scss

@@ -1,6 +1,33 @@
+@import '../../colors.scss';
+
 .container {
+  display: flex;
+  flex-direction: column;
+  color: $text-color;
+
+  .inputBlock {
     display: flex;
     flex-direction: column;
     gap: 25px;
     margin-top: 10px;
   }
+}
+
+.subHeader {
+  border-bottom: 0.5px solid;
+}
+
+.listItem {
+  display: flex;
+  align-items: center;
+  justify-content: space-between !important;
+
+  .img {
+    max-width: 100px;
+  }
+
+  .name {
+    text-align: center;
+    cursor: pointer;
+  }
+}

src/pages/sign/index.tsx

@@ -1,267 +1,192 @@
-import { Clear } from '@mui/icons-material'
-import {
-  Box,
-  Button,
-  FormControl,
-  IconButton,
-  InputLabel,
-  MenuItem,
-  Paper,
-  Select,
-  Table,
-  TableBody,
-  TableCell,
-  TableContainer,
-  TableHead,
-  TableRow,
-  TextField,
-  Tooltip,
-  Typography
-} from '@mui/material'
+import { Box, Button, Typography } from '@mui/material'
 import { MuiFileInput } from 'mui-file-input'
-import { useEffect, useState } from 'react'
-import { Link } from 'react-router-dom'
-import placeholderAvatar from '../../assets/images/nostr-logo.jpg'
+import { useState } from 'react'
 import { LoadingSpinner } from '../../components/LoadingSpinner'
-import { MetadataController, NostrController } from '../../controllers'
-import { getProfileRoute } from '../../routes'
-import { ProfileMetadata, User, UserRole } from '../../types'
+import styles from './style.module.scss'
+import JSZip from 'jszip'
+import { toast } from 'react-toastify'
 import {
   encryptArrayBuffer,
   generateEncryptionKey,
   getHash,
-  hexToNpub,
-  pubToHex,
-  queryNip05,
+  parseJson,
+  readContentOfZipEntry,
   sendDM,
-  shorten,
   signEventForMetaFile,
   uploadToFileStorage
 } from '../../utils'
-import styles from './style.module.scss'
-import { toast } from 'react-toastify'
-import JSZip from 'jszip'
 import { useSelector } from 'react-redux'
 import { State } from '../../store/rootReducer'
+import { NostrController } from '../../controllers'
+
+export const SignDocument = () => {
+  const [selectedFile, setSelectedFile] = useState<File | null>(null)
 
-export const SignPage = () => {
   const [isLoading, setIsLoading] = useState(false)
   const [loadingSpinnerDesc, setLoadingSpinnerDesc] = useState('')
-
+  const [isDraggingOver, setIsDraggingOver] = useState(false)
   const [authUrl, setAuthUrl] = useState<string>()
 
-  const [selectedFiles, setSelectedFiles] = useState<File[]>([])
-  const [displayUserInput, setDisplayUserInput] = useState(false)
-
-  const [userInput, setUserInput] = useState('')
-  const [userRole, setUserRole] = useState<UserRole>(UserRole.signer)
-  const [error, setError] = useState<string>()
-
-  const [users, setUsers] = useState<User[]>([])
-
   const usersPubkey = useSelector((state: State) => state.auth.usersPubkey)
 
   const nostrController = NostrController.getInstance()
 
-  const handleAddUser = async () => {
-    setError(undefined)
-
-    const addUser = (pubkey: string) => {
-      setUsers((prev) => {
-        const existingUserIndex = prev.findIndex(
-          (user) => user.pubkey === pubkey
-        )
-
-        // add new
-        if (existingUserIndex === -1)
-          return [...prev, { pubkey, role: userRole }]
-
-        const existingUser = prev[existingUserIndex]
-
-        // return existing
-        if (existingUser.role === userRole) return prev
-
-        // change user role
-        const updatedUsers = [...prev]
-        const updatedUser = { ...updatedUsers[existingUserIndex] }
-        updatedUser.role = userRole
-        updatedUsers[existingUserIndex] = updatedUser
-
-        return updatedUsers
-      })
-
-      setUserInput('')
+  const handleDrop = (event: React.DragEvent<HTMLDivElement>) => {
+    event.preventDefault()
+    setIsDraggingOver(false)
+    const file = event.dataTransfer.files[0]
+    if (file.type === 'application/zip') setSelectedFile(file)
   }
 
-    if (userInput.startsWith('npub')) {
-      const pubkey = await pubToHex(userInput)
-      if (pubkey) {
-        addUser(pubkey)
-        setUserInput('')
-      } else {
-        setError('Provided npub is not valid. Please enter correct npub.')
-      }
-      return
-    }
-
-    if (userInput.includes('@')) {
-      setIsLoading(true)
-      setLoadingSpinnerDesc('Querying for nip05')
-      const nip05Profile = await queryNip05(userInput)
-        .catch((err) => {
-          console.error(`error occurred in querying nip05: ${userInput}`, err)
-          return null
-        })
-        .finally(() => {
-          setIsLoading(false)
-          setLoadingSpinnerDesc('')
-        })
-
-      if (nip05Profile) {
-        const pubkey = nip05Profile.pubkey
-        addUser(pubkey)
-        setUserInput('')
-      } else {
-        setError('Provided nip05 is not valid. Please enter correct nip05.')
-      }
-      return
-    }
-
-    setError('Invalid input! Make sure to provide correct npub or nip05.')
-  }
-
-  const handleUserRoleChange = (role: UserRole, index: number) => {
-    setUsers((prevUsers) => {
-      // Create a shallow copy of the previous state
-      const updatedUsers = [...prevUsers]
-      // Create a shallow copy of the user object at the specified index
-      const updatedUser = { ...updatedUsers[index] }
-      // Update the role property of the copied user object
-      updatedUser.role = role
-      // Update the user object at the specified index in the copied array
-      updatedUsers[index] = updatedUser
-      // Return the updated array
-      return updatedUsers
-    })
-  }
-
-  const handleRemoveUser = (pubkey: string) => {
-    setUsers((prev) => prev.filter((user) => user.pubkey !== pubkey))
-  }
-
-  const handleSelectFiles = (files: File[]) => {
-    setDisplayUserInput(true)
-    setSelectedFiles((prev) => {
-      const prevFileNames = prev.map((file) => file.name)
-
-      const newFiles = files.filter(
-        (file) => !prevFileNames.includes(file.name)
-      )
-
-      return [...prev, ...newFiles]
-    })
-  }
-
-  const handleRemoveFile = (fileToRemove: File) => {
-    setSelectedFiles((prevFiles) =>
-      prevFiles.filter((file) => file.name !== fileToRemove.name)
-    )
+  const handleDragOver = (event: React.DragEvent<HTMLDivElement>) => {
+    event.preventDefault()
+    setIsDraggingOver(true)
   }
 
   const handleSign = async () => {
-    if (users.length === 0) {
-      toast.error(
-        'No signer/viewer is provided.  At least add one signer or viewer.'
-      )
-      return
-    }
-
-    if (selectedFiles.length === 0) {
-      toast.error('No file is selected. Select at least 1 file')
-      return
-    }
+    if (!selectedFile) return
 
     setIsLoading(true)
-    setLoadingSpinnerDesc('Generating hashes for files')
-
-    const fileHashes: { [key: string]: string } = {}
-
-    // generating file hashes
-    for (const file of selectedFiles) {
-      const arraybuffer = await file.arrayBuffer().catch((err) => {
-        console.log(
-          `err while getting arrayBuffer of file ${file.name} :>> `,
-          err
-        )
-        toast.error(
-          err.message || `err while getting arrayBuffer of file ${file.name}`
-        )
+    setLoadingSpinnerDesc('Parsing zip file')
+    const zip = await JSZip.loadAsync(selectedFile).catch((err) => {
+      console.log('err in loading zip file :>> ', err)
+      toast.error(err.message || 'An error occurred in loading zip file.')
       return null
     })
 
-      if (!arraybuffer) return
+    if (!zip) return
 
-      const hash = await getHash(arraybuffer)
+    setLoadingSpinnerDesc('Parsing meta.json')
 
+    const metaFileContent = await readContentOfZipEntry(
+      zip,
+      'meta.json',
+      'string'
+    )
+
+    if (!metaFileContent) {
+      setIsLoading(false)
+      return
+    }
+
+    const meta = await parseJson(metaFileContent).catch((err) => {
+      console.log('err in parsing the content of meta.json :>> ', err)
+      toast.error(
+        err.message || 'error occurred in parsing the content of meta.json'
+      )
+      setIsLoading(false)
+      return null
+    })
+
+    const hashesFileContent = await readContentOfZipEntry(
+      zip,
+      'hashes.json',
+      'string'
+    )
+
+    if (!hashesFileContent) {
+      setIsLoading(false)
+      return
+    }
+
+    const hashes = await parseJson(hashesFileContent).catch((err) => {
+      console.log('err in parsing the content of hashes.json :>> ', err)
+      toast.error(
+        err.message || 'error occurred in parsing the content of hashes.json'
+      )
+      setIsLoading(false)
+      return null
+    })
+
+    if (!hashes) return
+
+    setLoadingSpinnerDesc('Generating hashes for files')
+
+    const fileHashes: { [key: string]: string } = {}
+    const fileNames = Object.keys(meta.fileHashes)
+
+    // create generate hashes for all entries in files folder of zipArchive
+    // these hashes can be used to verify the originality of files
+    for (const fileName of fileNames) {
+      const filePath = `files/${fileName}`
+      const arrayBuffer = await readContentOfZipEntry(
+        zip,
+        filePath,
+        'arraybuffer'
+      )
+
+      if (!arrayBuffer) {
+        setIsLoading(false)
+        return
+      }
+
+      const hash = await getHash(arrayBuffer)
       if (!hash) {
         setIsLoading(false)
         return
       }
 
-      fileHashes[file.name] = hash
+      fileHashes[fileName] = hash
     }
 
-    const zip = new JSZip()
+    // check if the current user is the last signer
+    const lastSignerIndex = meta.signers.length - 1
+    const signerIndex = meta.signers.indexOf(usersPubkey)
+    const isLastSigner = signerIndex === lastSignerIndex
 
-    // zipping files
-    selectedFiles.forEach((file) => {
-      zip.file(`files/${file.name}`, file)
-    })
+    // if current user is the last signer, then send DMs to all viewers
+    if (isLastSigner) {
+      for (const viewer of meta.viewers) {
+        await signAndSendToNext(zip, meta, hashes, viewer, fileHashes, false)
+      }
+    } else {
+      const nextSigner = meta.signers[signerIndex + 1]
 
-    const signers = users.filter((user) => user.role === UserRole.signer)
-    const viewers = users.filter((user) => user.role === UserRole.viewer)
+      await signAndSendToNext(zip, meta, hashes, nextSigner, fileHashes, true)
+    }
+
+    setIsLoading(false)
+  }
+
+  const signAndSendToNext = async (
+    zip: JSZip,
+    meta: any,
+    hashes: any,
+    receiver: string,
+    fileHashes: {
+      [key: string]: string
+    },
+    isNextSigner: boolean
+  ) => {
+    setLoadingSpinnerDesc('Signing nostr event for meta file')
 
-    setLoadingSpinnerDesc('Signing nostr event')
     const signedEvent = await signEventForMetaFile(
+      receiver,
       fileHashes,
       nostrController,
       setIsLoading
     )
-
     if (!signedEvent) return
 
-    // create content for meta file
-    const meta = {
-      signers: signers.map((signer) => signer.pubkey),
-      viewers: viewers.map((viewer) => viewer.pubkey),
-      fileHashes,
-      submittedBy: usersPubkey,
-      signedEvents: {
+    meta.signedEvents = {
+      ...meta.signedEvents,
       [signedEvent.pubkey]: JSON.stringify(signedEvent, null, 2)
     }
-    }
 
-    try {
     const stringifiedMeta = JSON.stringify(meta, null, 2)
     zip.file('meta.json', stringifiedMeta)
 
     const metaHash = await getHash(stringifiedMeta)
     if (!metaHash) return
 
-      const metaHashJson = {
+    hashes = {
+      ...hashes,
       [usersPubkey!]: metaHash
     }
 
-      zip.file('hashes.json', JSON.stringify(metaHashJson, null, 2))
-    } catch (err) {
-      console.error(err)
-      toast.error('An error occurred in converting meta json to string')
-      return
-    }
+    zip.file('hashes.json', JSON.stringify(hashes, null, 2))
 
-    setLoadingSpinnerDesc('Generating zip file')
-
-    const arraybuffer = await zip
+    const arrayBuffer = await zip
       .generateAsync({
         type: 'arraybuffer',
         compression: 'DEFLATE',
@@ -276,13 +201,13 @@ export const SignPage = () => {
         return null
       })
 
-    if (!arraybuffer) return
+    if (!arrayBuffer) return
 
     const encryptionKey = await generateEncryptionKey()
 
     setLoadingSpinnerDesc('Encrypting zip file')
     const encryptedArrayBuffer = await encryptArrayBuffer(
-      arraybuffer,
+      arrayBuffer,
       encryptionKey
     )
 
@@ -303,34 +228,17 @@ export const SignPage = () => {
 
     if (!fileUrl) return
 
-    setLoadingSpinnerDesc('Sending DM to signers/viewers')
-
-    // send DM to first signer if exists
-    if (signers.length > 0) {
+    setLoadingSpinnerDesc(
+      `Sending DM to next ${isNextSigner ? 'signer' : 'viewer'}`
+    )
     await sendDM(
       fileUrl,
       encryptionKey,
-        signers[0].pubkey,
+      receiver,
       nostrController,
-        true,
+      isNextSigner,
       setAuthUrl
     )
-    } else {
-      // send DM to all viewers if no signer
-      for (const viewer of viewers) {
-        // todo: execute in parallel
-        await sendDM(
-          fileUrl,
-          encryptionKey,
-          viewer.pubkey,
-          nostrController,
-          false,
-          setAuthUrl
-        )
-      }
-    }
-
-    setIsLoading(false)
   }
 
   if (authUrl) {
@@ -349,193 +257,37 @@ export const SignPage = () => {
       {isLoading && <LoadingSpinner desc={loadingSpinnerDesc} />}
       <Box className={styles.container}>
         <Typography component='label' variant='h6'>
-          Select files
+          Select decrypted zip file
         </Typography>
 
+        <Box
+          className={styles.inputBlock}
+          onDrop={handleDrop}
+          onDragOver={handleDragOver}
+        >
+          {isDraggingOver && (
+            <Box className={styles.fileDragOver}>
+              <Typography variant='body1'>Drop file here</Typography>
+            </Box>
+          )}
           <MuiFileInput
-          multiple
-          placeholder='Choose Files'
-          value={selectedFiles}
-          onChange={(value) => handleSelectFiles(value)}
+            placeholder='Drop file here, or click to select'
+            value={selectedFile}
+            onChange={(value) => setSelectedFile(value)}
+            InputProps={{
+              inputProps: {
+                accept: '.zip'
+              }
+            }}
           />
-
-        <ul>
-          {selectedFiles.map((file, index) => (
-            <li key={index}>
-              <Typography component='label'>{file.name}</Typography>
-              <IconButton onClick={() => handleRemoveFile(file)}>
-                <Clear style={{ color: 'red' }} />{' '}
-              </IconButton>
-            </li>
-          ))}
-        </ul>
-
-        {displayUserInput && (
-          <>
-            <Typography component='label' variant='h6'>
-              Select signers and viewers
-            </Typography>
-            <Box className={styles.inputBlock}>
-              <TextField
-                label='nip05 / npub'
-                value={userInput}
-                onChange={(e) => setUserInput(e.target.value)}
-                helperText={error}
-                error={!!error}
-              />
-              <FormControl fullWidth>
-                <InputLabel id='select-role-label'>Role</InputLabel>
-                <Select
-                  labelId='select-role-label'
-                  id='demo-simple-select'
-                  value={userRole}
-                  label='Role'
-                  onChange={(e) => setUserRole(e.target.value as UserRole)}
-                >
-                  <MenuItem value={UserRole.signer}>{UserRole.signer}</MenuItem>
-                  <MenuItem value={UserRole.viewer}>{UserRole.viewer}</MenuItem>
-                </Select>
-              </FormControl>
-
-              <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
-                <Button
-                  disabled={!userInput}
-                  onClick={handleAddUser}
-                  variant='contained'
-                >
-                  Add
-                </Button>
         </Box>
-            </Box>
-            <DisplayUser
-              users={users}
-              handleUserRoleChange={handleUserRoleChange}
-              handleRemoveUser={handleRemoveUser}
-            />
+
         <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
           <Button onClick={handleSign} variant='contained'>
             Sign
           </Button>
         </Box>
-          </>
-        )}
       </Box>
     </>
   )
 }
-
-type DisplayUsersProps = {
-  users: User[]
-  handleUserRoleChange: (role: UserRole, index: number) => void
-  handleRemoveUser: (pubkey: string) => void
-}
-
-const DisplayUser = ({
-  users,
-  handleUserRoleChange,
-  handleRemoveUser
-}: DisplayUsersProps) => {
-  const [metadata, setMetadata] = useState<{ [key: string]: ProfileMetadata }>(
-    {}
-  )
-
-  useEffect(() => {
-    users.forEach((user) => {
-      if (!(user.pubkey in metadata)) {
-        const metadataController = new MetadataController()
-
-        metadataController
-          .findMetadata(user.pubkey)
-          .then((metadataEvent) => {
-            const metadataContent =
-              metadataController.extractProfileMetadataContent(metadataEvent)
-            if (metadataContent)
-              setMetadata((prev) => ({
-                ...prev,
-                [user.pubkey]: metadataContent
-              }))
-          })
-          .catch((err) => {
-            console.error(
-              `error occurred in finding metadata for: ${user.pubkey}`,
-              err
-            )
-          })
-      }
-    })
-  }, [users])
-
-  const imageLoadError = (event: any) => {
-    event.target.src = placeholderAvatar
-  }
-
-  return (
-    <TableContainer component={Paper} elevation={3} sx={{ marginTop: '20px' }}>
-      <Table>
-        <TableHead>
-          <TableRow>
-            <TableCell className={styles.tableCell}>User</TableCell>
-            <TableCell className={styles.tableCell}>Role</TableCell>
-            <TableCell>Action</TableCell>
-          </TableRow>
-        </TableHead>
-        <TableBody>
-          {users.map((user, index) => {
-            const userMeta = metadata[user.pubkey]
-            const npub = hexToNpub(user.pubkey)
-            const roboUrl = `https://robohash.org/${npub}.png?set=set3`
-            return (
-              <TableRow key={index}>
-                <TableCell className={styles.tableCell}>
-                  <Box className={styles.user}>
-                    <img
-                      onError={imageLoadError}
-                      src={userMeta?.picture || roboUrl}
-                      alt='Profile Image'
-                      className='profile-image'
-                      style={{
-                        borderWidth: '3px',
-                        borderStyle: 'solid',
-                        borderColor: `#${user.pubkey.substring(0, 6)}`
-                      }}
-                    />
-                    <Link to={getProfileRoute(user.pubkey)}>
-                      <Typography component='label' className={styles.name}>
-                        {userMeta?.display_name ||
-                          userMeta?.name ||
-                          shorten(npub)}
-                      </Typography>
-                    </Link>
-                  </Box>
-                </TableCell>
-                <TableCell className={styles.tableCell}>
-                  <Select
-                    fullWidth
-                    value={user.role}
-                    onChange={(e) =>
-                      handleUserRoleChange(e.target.value as UserRole, index)
-                    }
-                  >
-                    <MenuItem value={UserRole.signer}>
-                      {UserRole.signer}
-                    </MenuItem>
-                    <MenuItem value={UserRole.viewer}>
-                      {UserRole.viewer}
-                    </MenuItem>
-                  </Select>
-                </TableCell>
-                <TableCell>
-                  <Tooltip title='Remove User' arrow>
-                    <IconButton onClick={() => handleRemoveUser(user.pubkey)}>
-                      <Clear style={{ color: 'red' }} />
-                    </IconButton>
-                  </Tooltip>
-                </TableCell>
-              </TableRow>
-            )
-          })}
-        </TableBody>
-      </Table>
-    </TableContainer>
-  )
-}

src/pages/sign/style.module.scss

@@ -6,28 +6,22 @@
   color: $text-color;
 
   .inputBlock {
+    position: relative;
     display: flex;
     flex-direction: column;
     gap: 25px;
-    margin-top: 10px;
-  }
   }
 
-.subHeader {
-  border-bottom: 0.5px solid;
-}
-
-.tableCell {
-  border-right: 1px solid rgba(224, 224, 224, 1);
-
-  .user {
+  .fileDragOver {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background-color: rgba(255, 255, 255, 0.8);
+    z-index: 1;
     display: flex;
+    justify-content: center;
     align-items: center;
-    gap: 10px;
-
-    .name {
-      text-align: center;
-      cursor: pointer;
-    }
   }
 }

src/pages/verify/index.tsx

@@ -1,795 +0,0 @@
-import {
-  Box,
-  Button,
-  List,
-  ListItem,
-  ListSubheader,
-  Table,
-  TableBody,
-  TableCell,
-  TableHead,
-  TableRow,
-  TextField,
-  Typography,
-  useTheme
-} from '@mui/material'
-import axios from 'axios'
-import saveAs from 'file-saver'
-import JSZip from 'jszip'
-import _ from 'lodash'
-import { MuiFileInput } from 'mui-file-input'
-import { EventTemplate } from 'nostr-tools'
-import { useEffect, useState } from 'react'
-import { useSelector } from 'react-redux'
-import { Link, useSearchParams } from 'react-router-dom'
-import { toast } from 'react-toastify'
-import placeholderAvatar from '../../assets/images/nostr-logo.jpg'
-import { LoadingSpinner } from '../../components/LoadingSpinner'
-import { MetadataController, NostrController } from '../../controllers'
-import { getProfileRoute } from '../../routes'
-import { State } from '../../store/rootReducer'
-import { Meta, ProfileMetadata, User, UserRole } from '../../types'
-import {
-  decryptArrayBuffer,
-  encryptArrayBuffer,
-  generateEncryptionKey,
-  getHash,
-  hexToNpub,
-  parseJson,
-  readContentOfZipEntry,
-  sendDM,
-  shorten,
-  signEventForMetaFile,
-  uploadToFileStorage
-} from '../../utils'
-import styles from './style.module.scss'
-
-enum SignedStatus {
-  Fully_Signed,
-  User_Is_Next_Signer,
-  User_Is_Not_Next_Signer
-}
-
-export const VerifyPage = () => {
-  const [searchParams] = useSearchParams()
-
-  const [displayInput, setDisplayInput] = useState(false)
-
-  const [selectedFile, setSelectedFile] = useState<File | null>(null)
-  const [encryptionKey, setEncryptionKey] = useState('')
-
-  const [zip, setZip] = useState<JSZip>()
-
-  const [isLoading, setIsLoading] = useState(true)
-  const [loadingSpinnerDesc, setLoadingSpinnerDesc] = useState('')
-  const [isDraggingOver, setIsDraggingOver] = useState(false)
-
-  const [meta, setMeta] = useState<Meta | null>(null)
-  const [signedStatus, setSignedStatus] = useState<SignedStatus>()
-
-  const [nextSinger, setNextSinger] = useState<string>()
-
-  const usersPubkey = useSelector((state: State) => state.auth.usersPubkey)
-
-  const [authUrl, setAuthUrl] = useState<string>()
-  const nostrController = NostrController.getInstance()
-
-  useEffect(() => {
-    if (meta) {
-      setDisplayInput(false)
-
-      // get list of users who have signed
-      const signedBy = Object.keys(meta.signedEvents)
-
-      if (meta.signers.length > 0) {
-        // check if all signers have signed then its fully signed
-        if (meta.signers.every((signer) => signedBy.includes(signer))) {
-          setSignedStatus(SignedStatus.Fully_Signed)
-        } else {
-          for (const signer of meta.signers) {
-            if (!signedBy.includes(signer)) {
-              setNextSinger(signer)
-
-              if (signer === usersPubkey) {
-                // logged in user is the next signer
-                setSignedStatus(SignedStatus.User_Is_Next_Signer)
-              } else {
-                setSignedStatus(SignedStatus.User_Is_Not_Next_Signer)
-              }
-
-              break
-            }
-          }
-        }
-      } else {
-        // there's no signer just viewers. So its fully signed
-        setSignedStatus(SignedStatus.Fully_Signed)
-      }
-    }
-  }, [meta, usersPubkey])
-
-  useEffect(() => {
-    const fileUrl = searchParams.get('file')
-    const key = searchParams.get('key')
-
-    if (fileUrl && key) {
-      setIsLoading(true)
-      setLoadingSpinnerDesc('Fetching file from file server')
-
-      axios
-        .get(fileUrl, {
-          responseType: 'arraybuffer'
-        })
-        .then((res) => {
-          const fileName = fileUrl.split('/').pop()
-          const file = new File([res.data], fileName!)
-
-          decrypt(file, key).then((arrayBuffer) => {
-            if (arrayBuffer) handleDecryptedArrayBuffer(arrayBuffer)
-          })
-        })
-        .catch((err) => {
-          console.error(`error occurred in getting file from ${fileUrl}`, err)
-          toast.error(
-            err.message || `error occurred in getting file from ${fileUrl}`
-          )
-        })
-        .finally(() => {
-          setIsLoading(false)
-        })
-    } else {
-      setIsLoading(false)
-      setDisplayInput(true)
-    }
-  }, [searchParams])
-
-  const decrypt = async (file: File, key: string) => {
-    setLoadingSpinnerDesc('Decrypting file')
-
-    const encryptedArrayBuffer = await file.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
-      })
-      .finally(() => {
-        setIsLoading(false)
-      })
-
-    return arrayBuffer
-  }
-
-  const handleDecryptedArrayBuffer = async (arrayBuffer: ArrayBuffer) => {
-    const decryptedZipFile = new File([arrayBuffer], 'decrypted.zip')
-
-    setLoadingSpinnerDesc('Parsing zip file')
-
-    const zip = await JSZip.loadAsync(decryptedZipFile).catch((err) => {
-      console.log('err in loading zip file :>> ', err)
-      toast.error(err.message || 'An error occurred in loading zip file.')
-      return null
-    })
-
-    if (!zip) return
-
-    setZip(zip)
-
-    setLoadingSpinnerDesc('Parsing meta.json')
-
-    const metaFileContent = await readContentOfZipEntry(
-      zip,
-      'meta.json',
-      'string'
-    )
-
-    if (!metaFileContent) {
-      setIsLoading(false)
-      return
-    }
-
-    const parsedMetaJson = await parseJson<Meta>(metaFileContent).catch(
-      (err) => {
-        console.log('err in parsing the content of meta.json :>> ', err)
-        toast.error(
-          err.message || 'error occurred in parsing the content of meta.json'
-        )
-        setIsLoading(false)
-        return null
-      }
-    )
-
-    setMeta(parsedMetaJson)
-  }
-
-  const handleDecrypt = async () => {
-    if (!selectedFile || !encryptionKey) return
-
-    setIsLoading(true)
-    const arrayBuffer = await decrypt(selectedFile, encryptionKey)
-
-    if (!arrayBuffer) return
-
-    handleDecryptedArrayBuffer(arrayBuffer)
-  }
-
-  const handleDrop = (event: React.DragEvent<HTMLDivElement>) => {
-    event.preventDefault()
-    setIsDraggingOver(false)
-    const file = event.dataTransfer.files[0]
-    if (file.type === 'application/zip') setSelectedFile(file)
-  }
-
-  const handleDragOver = (event: React.DragEvent<HTMLDivElement>) => {
-    event.preventDefault()
-    setIsDraggingOver(true)
-  }
-
-  const handleSign = async () => {
-    if (!zip || !meta) return
-
-    setIsLoading(true)
-    setLoadingSpinnerDesc('parsing hashes.json file')
-
-    const hashesFileContent = await readContentOfZipEntry(
-      zip,
-      'hashes.json',
-      'string'
-    )
-
-    if (!hashesFileContent) {
-      setIsLoading(false)
-      return
-    }
-
-    let hashes = await parseJson(hashesFileContent).catch((err) => {
-      console.log('err in parsing the content of hashes.json :>> ', err)
-      toast.error(
-        err.message || 'error occurred in parsing the content of hashes.json'
-      )
-      setIsLoading(false)
-      return null
-    })
-
-    if (!hashes) return
-
-    setLoadingSpinnerDesc('Generating hashes for files')
-
-    const fileHashes: { [key: string]: string } = {}
-    const fileNames = Object.keys(meta.fileHashes)
-
-    // generate hashes for all entries in files folder of zipArchive
-    // these hashes can be used to verify the originality of files
-    for (const fileName of fileNames) {
-      const filePath = `files/${fileName}`
-      const arrayBuffer = await readContentOfZipEntry(
-        zip,
-        filePath,
-        'arraybuffer'
-      )
-
-      if (!arrayBuffer) {
-        setIsLoading(false)
-        return
-      }
-
-      const hash = await getHash(arrayBuffer)
-      if (!hash) {
-        setIsLoading(false)
-        return
-      }
-
-      fileHashes[fileName] = hash
-    }
-
-    setLoadingSpinnerDesc('Signing nostr event')
-    const signedEvent = await signEventForMetaFile(
-      fileHashes,
-      nostrController,
-      setIsLoading
-    )
-
-    if (!signedEvent) return
-
-    const metaCopy = _.cloneDeep(meta)
-
-    metaCopy.signedEvents = {
-      ...metaCopy.signedEvents,
-      [signedEvent.pubkey]: JSON.stringify(signedEvent, null, 2)
-    }
-
-    const stringifiedMeta = JSON.stringify(metaCopy, null, 2)
-    zip.file('meta.json', stringifiedMeta)
-
-    const metaHash = await getHash(stringifiedMeta)
-    if (!metaHash) return
-
-    hashes = {
-      ...hashes,
-      [usersPubkey!]: metaHash
-    }
-
-    zip.file('hashes.json', JSON.stringify(hashes, null, 2))
-
-    const arrayBuffer = await zip
-      .generateAsync({
-        type: 'arraybuffer',
-        compression: 'DEFLATE',
-        compressionOptions: {
-          level: 6
-        }
-      })
-      .catch((err) => {
-        console.log('err in zip:>> ', err)
-        setIsLoading(false)
-        toast.error(err.message || 'Error occurred in generating zip file')
-        return null
-      })
-
-    if (!arrayBuffer) return
-
-    const encryptionKey = await generateEncryptionKey()
-
-    setLoadingSpinnerDesc('Encrypting zip file')
-    const encryptedArrayBuffer = await encryptArrayBuffer(
-      arrayBuffer,
-      encryptionKey
-    )
-
-    const blob = new Blob([encryptedArrayBuffer])
-
-    setLoadingSpinnerDesc('Uploading zip file to file storage.')
-    const fileUrl = await uploadToFileStorage(blob, nostrController)
-      .then((url) => {
-        toast.success('zip file uploaded to file storage')
-        return url
-      })
-      .catch((err) => {
-        console.log('err in upload:>> ', err)
-        setIsLoading(false)
-        toast.error(err.message || 'Error occurred in uploading zip file')
-        return null
-      })
-
-    if (!fileUrl) return
-
-    // check if the current user is the last signer
-    const lastSignerIndex = meta.signers.length - 1
-    const signerIndex = meta.signers.indexOf(usersPubkey!)
-    const isLastSigner = signerIndex === lastSignerIndex
-
-    // if current user is the last signer, then send DMs to all signers and viewers
-    if (isLastSigner) {
-      const userSet = new Set<string>()
-
-      userSet.add(meta.submittedBy)
-
-      meta.signers.forEach((signer) => {
-        userSet.add(signer)
-      })
-
-      meta.viewers.forEach((viewer) => {
-        userSet.add(viewer)
-      })
-
-      const users = Array.from(userSet)
-
-      for (const user of users) {
-        // todo: execute in parallel
-        await sendDM(
-          fileUrl,
-          encryptionKey,
-          user,
-          nostrController,
-          false,
-          setAuthUrl
-        )
-      }
-    } else {
-      const nextSigner = meta.signers[signerIndex + 1]
-      await sendDM(
-        fileUrl,
-        encryptionKey,
-        nextSigner,
-        nostrController,
-        false,
-        setAuthUrl
-      )
-    }
-
-    setIsLoading(false)
-  }
-
-  const handleExport = async () => {
-    if (!meta || !zip || !usersPubkey) return
-
-    if (
-      !meta.signers.includes(usersPubkey) &&
-      !meta.viewers.includes(usersPubkey) &&
-      meta.submittedBy !== usersPubkey
-    )
-      return
-
-    setIsLoading(true)
-    setLoadingSpinnerDesc('Signing nostr event')
-    const event: EventTemplate = {
-      kind: 1,
-      content: '',
-      created_at: Math.floor(Date.now() / 1000), // Current timestamp
-      tags: []
-    }
-
-    // Sign the event
-    const signedEvent = await nostrController.signEvent(event).catch((err) => {
-      console.error(err)
-      toast.error(err.message || 'Error occurred in signing nostr event')
-      setIsLoading(false) // Set loading state to false
-      return null
-    })
-
-    if (!signedEvent) return
-
-    const exportSignature = JSON.stringify(signedEvent, null, 2)
-
-    const stringifiedMeta = JSON.stringify(
-      {
-        ...meta,
-        exportSignature
-      },
-      null,
-      2
-    )
-    zip.file('meta.json', stringifiedMeta)
-
-    const arrayBuffer = await zip
-      .generateAsync({
-        type: 'arraybuffer',
-        compression: 'DEFLATE',
-        compressionOptions: {
-          level: 6
-        }
-      })
-      .catch((err) => {
-        console.log('err in zip:>> ', err)
-        setIsLoading(false)
-        toast.error(err.message || 'Error occurred in generating zip file')
-        return null
-      })
-
-    if (!arrayBuffer) return
-
-    const blob = new Blob([arrayBuffer])
-    saveAs(blob, 'exported.zip')
-
-    setIsLoading(false)
-  }
-
-  if (authUrl) {
-    return (
-      <iframe
-        title='Nsecbunker auth'
-        src={authUrl}
-        width='100%'
-        height='500px'
-      />
-    )
-  }
-
-  return (
-    <>
-      {isLoading && <LoadingSpinner desc={loadingSpinnerDesc} />}
-      <Box className={styles.container}>
-        {displayInput && (
-          <>
-            <Typography component='label' variant='h6'>
-              Select sigit file
-            </Typography>
-
-            <Box
-              className={styles.inputBlock}
-              onDrop={handleDrop}
-              onDragOver={handleDragOver}
-            >
-              {isDraggingOver && (
-                <Box className={styles.fileDragOver}>
-                  <Typography variant='body1'>Drop file here</Typography>
-                </Box>
-              )}
-              <MuiFileInput
-                placeholder='Drop file here, or click to select'
-                value={selectedFile}
-                onChange={(value) => setSelectedFile(value)}
-                InputProps={{
-                  inputProps: {
-                    accept: '.zip'
-                  }
-                }}
-              />
-
-              {selectedFile && (
-                <TextField
-                  label='Encryption Key'
-                  variant='outlined'
-                  value={encryptionKey}
-                  onChange={(e) => setEncryptionKey(e.target.value)}
-                />
-              )}
-            </Box>
-
-            {selectedFile && encryptionKey && (
-              <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
-                <Button onClick={handleDecrypt} variant='contained'>
-                  Decrypt
-                </Button>
-              </Box>
-            )}
-          </>
-        )}
-
-        {meta && signedStatus === SignedStatus.Fully_Signed && (
-          <>
-            <DisplayMeta meta={meta} nextSigner={nextSinger} />
-            <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
-              <Button onClick={handleExport} variant='contained'>
-                Export
-              </Button>
-            </Box>
-          </>
-        )}
-
-        {meta && signedStatus === SignedStatus.User_Is_Not_Next_Signer && (
-          <DisplayMeta meta={meta} nextSigner={nextSinger} />
-        )}
-
-        {meta && signedStatus === SignedStatus.User_Is_Next_Signer && (
-          <>
-            <DisplayMeta meta={meta} nextSigner={nextSinger} />
-            <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
-              <Button onClick={handleSign} variant='contained'>
-                Sign
-              </Button>
-            </Box>
-          </>
-        )}
-      </Box>
-    </>
-  )
-}
-
-type DisplayMetaProps = {
-  meta: Meta
-  nextSigner?: string
-}
-
-const DisplayMeta = ({ meta, nextSigner }: DisplayMetaProps) => {
-  const theme = useTheme()
-
-  const textColor = theme.palette.getContrastText(
-    theme.palette.background.paper
-  )
-
-  const [metadata, setMetadata] = useState<{ [key: string]: ProfileMetadata }>(
-    {}
-  )
-  const [users, setUsers] = useState<User[]>([])
-
-  useEffect(() => {
-    meta.signers.forEach((signer) => {
-      setUsers((prev) => {
-        if (prev.findIndex((user) => user.pubkey === signer) !== -1) return prev
-
-        return [
-          ...prev,
-          {
-            pubkey: signer,
-            role: UserRole.signer
-          }
-        ]
-      })
-    })
-
-    meta.viewers.forEach((viewer) => {
-      setUsers((prev) => {
-        if (prev.findIndex((user) => user.pubkey === viewer) !== -1) return prev
-
-        return [
-          ...prev,
-          {
-            pubkey: viewer,
-            role: UserRole.viewer
-          }
-        ]
-      })
-    })
-  }, [meta])
-
-  useEffect(() => {
-    const metadataController = new MetadataController()
-
-    metadataController
-      .findMetadata(meta.submittedBy)
-      .then((metadataEvent) => {
-        const metadataContent =
-          metadataController.extractProfileMetadataContent(metadataEvent)
-        if (metadataContent)
-          setMetadata((prev) => ({
-            ...prev,
-            [meta.submittedBy]: metadataContent
-          }))
-      })
-      .catch((err) => {
-        console.error(
-          `error occurred in finding metadata for: ${meta.submittedBy}`,
-          err
-        )
-      })
-
-    users.forEach((user) => {
-      if (!(user.pubkey in metadata)) {
-        metadataController
-          .findMetadata(user.pubkey)
-          .then((metadataEvent) => {
-            const metadataContent =
-              metadataController.extractProfileMetadataContent(metadataEvent)
-            if (metadataContent)
-              setMetadata((prev) => ({
-                ...prev,
-                [user.pubkey]: metadataContent
-              }))
-          })
-          .catch((err) => {
-            console.error(
-              `error occurred in finding metadata for: ${user.pubkey}`,
-              err
-            )
-          })
-      }
-    })
-  }, [users, meta.submittedBy])
-
-  const imageLoadError = (event: any) => {
-    event.target.src = placeholderAvatar
-  }
-
-  const getRoboImageUrl = (pubkey: string) => {
-    const npub = hexToNpub(pubkey)
-    return `https://robohash.org/${npub}.png?set=set3`
-  }
-
-  return (
-    <List
-      sx={{
-        bgcolor: 'background.paper',
-        marginTop: 2
-      }}
-      subheader={
-        <ListSubheader
-          sx={{
-            borderBottom: '0.5px solid',
-            paddingBottom: 1,
-            paddingTop: 1,
-            fontSize: '1.5rem'
-          }}
-          className={styles.subHeader}
-        >
-          Meta Info
-        </ListSubheader>
-      }
-    >
-      <ListItem
-        sx={{
-          marginTop: 1,
-          gap: '15px'
-        }}
-      >
-        <Typography variant='h6' sx={{ color: textColor }}>
-          Submitted By
-        </Typography>
-        <Box className={styles.user}>
-          <img
-            onError={imageLoadError}
-            src={
-              metadata[meta.submittedBy]?.picture ||
-              getRoboImageUrl(meta.submittedBy)
-            }
-            alt='Profile Image'
-            className='profile-image'
-            style={{
-              borderWidth: '3px',
-              borderStyle: 'solid',
-              borderColor: `#${meta.submittedBy.substring(0, 6)}`
-            }}
-          />
-          <Link to={getProfileRoute(meta.submittedBy)}>
-            <Typography component='label' className={styles.name}>
-              {metadata[meta.submittedBy]?.display_name ||
-                metadata[meta.submittedBy]?.name ||
-                shorten(hexToNpub(meta.submittedBy))}
-            </Typography>
-          </Link>
-        </Box>
-      </ListItem>
-      <ListItem
-        sx={{
-          marginTop: 1,
-          flexDirection: 'column',
-          alignItems: 'flex-start'
-        }}
-      >
-        <Typography variant='h6' sx={{ color: textColor }}>
-          Files
-        </Typography>
-        <ul>
-          {Object.keys(meta.fileHashes).map((file, index) => (
-            <li key={index} style={{ color: textColor }}>
-              {file}
-            </li>
-          ))}
-        </ul>
-      </ListItem>
-      <ListItem sx={{ marginTop: 1 }}>
-        <Table>
-          <TableHead>
-            <TableRow>
-              <TableCell className={styles.tableCell}>User</TableCell>
-              <TableCell className={styles.tableCell}>Role</TableCell>
-              <TableCell>Signed Status</TableCell>
-            </TableRow>
-          </TableHead>
-          <TableBody>
-            {users.map((user, index) => {
-              const userMeta = metadata[user.pubkey]
-              const npub = hexToNpub(user.pubkey)
-              const roboUrl = `https://robohash.org/${npub}.png?set=set3`
-
-              let signedStatus = '-'
-
-              if (user.role === UserRole.signer) {
-                // check if user has signed the document
-                if (user.pubkey in meta.signedEvents) {
-                  signedStatus = 'Signed'
-                }
-                // check if user is the next signer
-                else if (user.pubkey === nextSigner) {
-                  signedStatus = 'Awaiting Signature'
-                }
-              }
-
-              return (
-                <TableRow key={index}>
-                  <TableCell className={styles.tableCell}>
-                    <Box className={styles.user}>
-                      <img
-                        onError={imageLoadError}
-                        src={userMeta?.picture || roboUrl}
-                        alt='Profile Image'
-                        className='profile-image'
-                        style={{
-                          borderWidth: '3px',
-                          borderStyle: 'solid',
-                          borderColor: `#${user.pubkey.substring(0, 6)}`
-                        }}
-                      />
-                      <Link to={getProfileRoute(user.pubkey)}>
-                        <Typography component='label' className={styles.name}>
-                          {userMeta?.display_name ||
-                            userMeta?.name ||
-                            shorten(npub)}
-                        </Typography>
-                      </Link>
-                    </Box>
-                  </TableCell>
-                  <TableCell className={styles.tableCell}>
-                    {user.role}
-                  </TableCell>
-                  <TableCell>{signedStatus}</TableCell>
-                </TableRow>
-              )
-            })}
-          </TableBody>
-        </Table>
-      </ListItem>
-    </List>
-  )
-}

src/pages/verify/style.module.scss

@@ -1,18 +0,0 @@
-.user {
-  display: flex;
-  align-items: center;
-  gap: 10px;
-
-  .name {
-    text-align: center;
-    cursor: pointer;
-  }
-}
-
-.tableCell {
-  border-right: 1px solid rgba(224, 224, 224, 1);
-
-  .user {
-    @extend .user;
-  }
-}

src/routes/index.tsx

@@ -1,15 +1,15 @@
+import { DecryptZip } from '../pages/decrypt'
 import { HomePage } from '../pages/home'
-import { SignPage } from '../pages/sign'
 import { LandingPage } from '../pages/landing/LandingPage'
 import { Login } from '../pages/login'
 import { ProfilePage } from '../pages/profile'
 import { hexToNpub } from '../utils'
-import { VerifyPage } from '../pages/verify'
+import { SignDocument } from '../pages/sign'
 
 export const appPrivateRoutes = {
   homePage: '/',
-  sign: '/sign',
-  verify: '/verify'
+  decryptZip: '/decrypt',
+  sign: '/sign'
 }
 
 export const appPublicRoutes = {
@@ -45,11 +45,11 @@ export const privateRoutes = [
     element: <HomePage />
   },
   {
-    path: appPrivateRoutes.sign,
-    element: <SignPage />
+    path: appPrivateRoutes.decryptZip,
+    element: <DecryptZip />
   },
   {
-    path: appPrivateRoutes.verify,
-    element: <VerifyPage />
+    path: appPrivateRoutes.sign,
+    element: <SignDocument />
   }
 ]

src/types/core.ts

@@ -1,17 +0,0 @@
-export enum UserRole {
-  signer = 'Signer',
-  viewer = 'Viewer'
-}
-
-export interface User {
-  pubkey: string
-  role: UserRole
-}
-
-export interface Meta {
-  signers: string[]
-  viewers: string[]
-  fileHashes: { [key: string]: string }
-  submittedBy: string
-  signedEvents: { [key: string]: string }
-}

src/types/index.ts

@@ -1,4 +1,3 @@
-export * from './core'
 export * from './nostr'
 export * from './profile'
 export * from './zip'

src/utils/misc.ts

@@ -75,11 +75,7 @@ export const sendDM = async (
     ? 'Your signature is requested on the document below!'
     : 'You have received a signed document.'
 
-  const decryptionUrl = `${window.location.origin}/#${
-    appPrivateRoutes.verify
-  }?file=${encodeURIComponent(fileUrl)}&key=${encodeURIComponent(
-    encryptionKey
-  )}`
+  const decryptionUrl = `${window.location.origin}/#${appPrivateRoutes.decryptZip}?file=${encodeURIComponent(fileUrl)}&key=${encodeURIComponent(encryptionKey)}`
 
   const content = `${initialLine}\n\n${decryptionUrl}\n\nDirect download${fileUrl}`
 
@@ -170,12 +166,14 @@ export const sendDM = async (
 
 /**
  * Signs an event for a meta.json file.
+ * @param receiver The recipient's public key.
  * @param fileHashes Object containing file hashes.
  * @param nostrController The NostrController instance for signing the event.
  * @param setIsLoading Function to set loading state in the component.
  * @returns A Promise resolving to the signed event, or null if signing fails.
  */
 export const signEventForMetaFile = async (
+  receiver: string,
   fileHashes: {
     [key: string]: string
   },
@@ -185,9 +183,9 @@ export const signEventForMetaFile = async (
   // Construct the event metadata for the meta file
   const event: EventTemplate = {
     kind: 1, // Event type for meta file
+    tags: [['r', receiver]], // Tag with recipient's public key
     content: JSON.stringify(fileHashes), // Convert file hashes to JSON string
-    created_at: Math.floor(Date.now() / 1000), // Current timestamp
-    tags: []
+    created_at: Math.floor(Date.now() / 1000) // Current timestamp
   }
 
   // Sign the event

src/utils/string.ts

@@ -65,11 +65,11 @@ export const hexStringToUint8Array = (hexString: string) => {
  * @param content The JSON content to parse.
  * @returns A Promise that resolves to the parsed JSON object.
  */
-export const parseJson = <T>(content: string): Promise<T> => {
+export const parseJson = (content: string): Promise<any> => {
   return new Promise((resolve, reject) => {
     try {
       // Attempt to parse the JSON content
-      const json = JSON.parse(content) as T
+      const json = JSON.parse(content)
       // Resolve the promise with the parsed JSON object
       resolve(json)
     } catch (error) {