Nip05 Support

app/src/main/java/com/vitorpamplona/amethyst/lnurl/Nip05Verifier.kt

@@ -0,0 +1,91 @@
+package com.vitorpamplona.amethyst.lnurl
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import java.net.URLEncoder
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import nostr.postr.Bech32
+import okhttp3.Call
+import okhttp3.Callback
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+
+class Nip05Verifier {
+  val client = OkHttpClient.Builder().build()
+
+  fun assembleUrl(nip05address: String): String? {
+    val parts = nip05address.split("@")
+
+    if (parts.size == 2) {
+      return "https://${parts[1]}/.well-known/nostr.json?name=${parts[0]}"
+    }
+
+    return null
+  }
+
+  fun fetchNip05Json(lnaddress: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val scope = CoroutineScope(Job() + Dispatchers.IO)
+    scope.launch {
+      fetchNip05JsonSuspend(lnaddress, onSuccess, onError)
+    }
+  }
+
+  private suspend fun fetchNip05JsonSuspend(nip05: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val url = assembleUrl(nip05)
+
+    if (url == null) {
+      onError("Could not assemble url from Nip05: \"${nip05}\". Check the user's setup")
+      return
+    }
+
+    withContext(Dispatchers.IO) {
+      val request: Request = Request.Builder().url(url).build()
+
+      client.newCall(request).enqueue(object : Callback {
+        override fun onResponse(call: Call, response: Response) {
+          response.use {
+            if (it.isSuccessful)
+              onSuccess(it.body.string())
+            else
+              onError("Could not resolve ${nip05}. Error: ${it.code}. Check if the server up and if the address ${nip05} is correct")
+          }
+        }
+
+        override fun onFailure(call: Call, e: java.io.IOException) {
+          onError("Could not resolve ${url}. Check if the server up and if the address ${nip05} is correct")
+          e.printStackTrace()
+        }
+      })
+    }
+  }
+
+  fun verifyNip05(nip05: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val mapper = jacksonObjectMapper()
+
+    fetchNip05Json(nip05,
+      onSuccess = {
+        val nip05url = try {
+          mapper.readTree(it)
+        } catch (t: Throwable) {
+          onError("Error Parsing JSON from Lightning Address. Check the user's lightning setup")
+          null
+        }
+
+        val user = nip05.split("@")[0]
+
+        val hexKey = nip05url?.get("names")?.get(user)?.asText()
+
+        if (hexKey == null) {
+          onError("Username not found in the NIP05 JSON")
+        } else {
+          onSuccess(hexKey)
+        }
+      },
+      onError = onError
+    )
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/model/User.kt

@@ -72,6 +72,10 @@ class User(val pubkeyHex: String) {
         return info?.displayName?.ifBlank { null } ?: info?.display_name?.ifBlank { null }
     }
 
+    fun nip05(): String? {
+        return info?.nip05?.ifBlank { null }
+    }
+
     fun profilePicture(): String? {
         if (info?.picture.isNullOrBlank()) info?.picture = null
         return info?.picture
@@ -347,7 +351,11 @@ class UserMetadata {
     var banner: String? = null
     var website: String? = null
     var about: String? = null
+
     var nip05: String? = null
+    var nip05Verified: Boolean = false
+    var nip05LastVerificationTime: Long? = 0
+
     var domain: String? = null
     var lud06: String? = null
     var lud16: String? = null

app/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -40,6 +40,8 @@ import com.vitorpamplona.amethyst.service.model.RepostEvent
 import com.vitorpamplona.amethyst.ui.components.AsyncImageProxy
 import com.vitorpamplona.amethyst.ui.components.ResizeImage
 import com.vitorpamplona.amethyst.ui.components.TranslateableRichTextViewer
+import com.vitorpamplona.amethyst.ui.screen.DisplayNip05Status
+import com.vitorpamplona.amethyst.ui.screen.ObserveDisplayNip05Status
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.Following
 import nostr.postr.events.TextNoteEvent
@@ -114,10 +116,11 @@ fun NoteCompose(
             parentBackgroundColor ?: MaterialTheme.colors.background
           }
 
-        Column(modifier = modifier.combinedClickable(
+        Column(modifier = modifier
+            .combinedClickable(
                 onClick = {
                     if (noteEvent !is ChannelMessageEvent) {
-                        navController.navigate("Note/${note.idHex}"){
+                        navController.navigate("Note/${note.idHex}") {
                             launchSingleTop = true
                         }
                     } else {
@@ -127,7 +130,8 @@ fun NoteCompose(
                     }
                 },
                 onLongClick = { popupExpanded = true }
-            ).background(backgroundColor)
+            )
+            .background(backgroundColor)
         ) {
             Row(
                 modifier = Modifier
@@ -246,6 +250,9 @@ fun NoteCompose(
                         }
                     }
 
+                    if (note.author != null)
+                        ObserveDisplayNip05Status(note.author!!)
+
                     if (noteEvent is TextNoteEvent && (note.replyTo != null || note.mentions != null)) {
                         ReplyInformation(note.replyTo, note.mentions, account, navController)
                     } else if (noteEvent is ChannelMessageEvent && (note.replyTo != null || note.mentions != null)) {

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/ProfileScreen.kt

@@ -1,5 +1,8 @@
 package com.vitorpamplona.amethyst.ui.screen
 
+import android.graphics.Rect
+import android.view.ViewTreeObserver
+import android.widget.Toast
 import androidx.compose.foundation.*
 import androidx.compose.foundation.gestures.scrollBy
 import androidx.compose.foundation.layout.*
@@ -9,10 +12,12 @@ import androidx.compose.foundation.text.ClickableText
 import androidx.compose.material.*
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Bolt
+import androidx.compose.material.icons.filled.Downloading
 import androidx.compose.material.icons.filled.EditNote
 import androidx.compose.material.icons.filled.Key
 import androidx.compose.material.icons.filled.Link
 import androidx.compose.material.icons.filled.MoreVert
+import androidx.compose.material.icons.filled.Report
 import androidx.compose.material.icons.filled.Share
 import androidx.compose.runtime.*
 import androidx.compose.runtime.livedata.observeAsState
@@ -30,10 +35,13 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.platform.LocalUriHandler
+import androidx.compose.ui.platform.LocalView
+import androidx.compose.ui.platform.UriHandler
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.IntSize
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -45,10 +53,11 @@ import com.google.accompanist.pager.ExperimentalPagerApi
 import com.google.accompanist.pager.HorizontalPager
 import com.google.accompanist.pager.pagerTabIndicatorOffset
 import com.google.accompanist.pager.rememberPagerState
-import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.lnurl.Nip05Verifier
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.model.UserMetadata
 import com.vitorpamplona.amethyst.service.NostrUserProfileDataSource
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.ui.components.AsyncImageProxy
@@ -61,10 +70,13 @@ import com.vitorpamplona.amethyst.ui.dal.UserProfileConversationsFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.UserProfileNewThreadFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.UserProfileReportsFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.UserProfileZapsFeedFilter
+import com.vitorpamplona.amethyst.ui.navigation.Keyboard
 import com.vitorpamplona.amethyst.ui.note.UserPicture
 import com.vitorpamplona.amethyst.ui.note.showAmount
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.BitcoinOrange
+import com.vitorpamplona.amethyst.ui.theme.Nip05
+import java.util.Date
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import nostr.postr.toNsec
@@ -343,6 +355,45 @@ private fun ProfileHeader(
     }
 }
 
+
+@Composable
+fun nip05VerificationAsAState(user: UserMetadata, pubkeyHex: String): State<Boolean?> {
+    var nip05Verified = remember { mutableStateOf<Boolean?>(null) }
+
+    LaunchedEffect(key1 = user) {
+        user.nip05?.ifBlank { null }?.let { nip05 ->
+            val now = Date().time / 1000
+            if ((user.nip05LastVerificationTime ?: 0) > (now - 60*60)) { // 1hour
+                nip05Verified.value = user.nip05Verified
+            } else {
+                println("Checking NIP05 online")
+                Nip05Verifier().verifyNip05(
+                    nip05,
+                    onSuccess = {
+                        // Marks user as verified
+                        if (it == pubkeyHex) {
+                            user.nip05Verified = true
+                            user.nip05LastVerificationTime = now
+                            nip05Verified.value = true
+                        } else {
+                            user.nip05Verified = false
+                            user.nip05LastVerificationTime = 0
+                            nip05Verified.value = false
+                        }
+                    },
+                    onError = {
+                        user.nip05LastVerificationTime = 0
+                        user.nip05Verified = false
+                        nip05Verified.value = false
+                    }
+                )
+            }
+        }
+    }
+
+    return nip05Verified
+}
+
 @Composable
 private fun DrawAdditionalInfo(baseUser: User, account: Account) {
     val userState by baseUser.live().metadata.observeAsState()
@@ -350,21 +401,25 @@ private fun DrawAdditionalInfo(baseUser: User, account: Account) {
 
     val uri = LocalUriHandler.current
 
-    user.bestDisplayName()?.let {
-        Text( "$it",
-            modifier = Modifier.padding(top = 7.dp),
-            fontWeight = FontWeight.Bold,
-            fontSize = 25.sp
-        )
+    Row(verticalAlignment = Alignment.Bottom) {
+        user.bestDisplayName()?.let {
+            Text( "$it",
+                modifier = Modifier.padding(top = 7.dp),
+                fontWeight = FontWeight.Bold,
+                fontSize = 25.sp
+            )
+        }
+
+        user.bestUsername()?.let {
+            Text(
+                "@$it",
+                color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
+                modifier = Modifier.padding(top = 1.dp, bottom = 1.dp, start = 5.dp)
+            )
+        }
     }
 
-    user.bestUsername()?.let {
-        Text(
-            "@$it",
-            color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
-            modifier = Modifier.padding(top = 1.dp, bottom = 1.dp, start = 5.dp)
-        )
-    }
+    DisplayNip05Status(user)
 
     val website = user.info?.website
     if (!website.isNullOrEmpty()) {
@@ -402,7 +457,9 @@ private fun DrawAdditionalInfo(baseUser: User, account: Account) {
                 text = AnnotatedString(lud16),
                 onClick = { ZapExpanded = !ZapExpanded },
                 style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary),
-                modifier = Modifier.padding(top = 1.dp, bottom = 1.dp, start = 5.dp).weight(1f)
+                modifier = Modifier
+                    .padding(top = 1.dp, bottom = 1.dp, start = 5.dp)
+                    .weight(1f)
             )
         }
 
@@ -424,6 +481,104 @@ private fun DrawAdditionalInfo(baseUser: User, account: Account) {
     }
 }
 
+@Composable
+fun ObserveDisplayNip05Status(baseUser: User) {
+    val userState by baseUser.live().metadata.observeAsState()
+    val user = userState?.user ?: return
+
+    val uri = LocalUriHandler.current
+
+    user.nip05()?.let { nip05 ->
+        if (nip05.split("@").size == 2) {
+            val nip05Verified by nip05VerificationAsAState(user.info!!, user.pubkeyHex)
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Text(
+                    text = AnnotatedString(nip05.split("@")[0]),
+                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis
+                )
+
+                if (nip05Verified == null) {
+                    Icon(
+                        tint = Color.Yellow,
+                        imageVector = Icons.Default.Downloading,
+                        contentDescription = "Downloading",
+                        modifier = Modifier.size(14.dp).padding(top = 1.dp)
+                    )
+                } else if (nip05Verified == true) {
+                    Icon(
+                        painter = painterResource(R.drawable.ic_verified),
+                        "NIP-05 Verified",
+                        tint = Nip05.copy(0.52f),
+                        modifier = Modifier.size(14.dp).padding(top = 1.dp)
+                    )
+                } else {
+                    Icon(
+                        tint = Color.Red,
+                        imageVector = Icons.Default.Report,
+                        contentDescription = "Invalid Nip05",
+                        modifier = Modifier.size(14.dp).padding(top = 1.dp)
+                    )
+                }
+
+                ClickableText(
+                    text = AnnotatedString(nip05.split("@")[1]),
+                    onClick = { nip05.let { runCatching { uri.openUri("https://${it.split("@")[1]}") } } },
+                    style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary.copy(0.52f)),
+                    modifier = Modifier.padding(top = 1.dp, bottom = 1.dp),
+                    maxLines = 1
+                )
+            }
+        }
+    }
+}
+
+@Composable
+fun DisplayNip05Status(user: User) {
+    val uri = LocalUriHandler.current
+
+    user.nip05()?.let { nip05 ->
+        val nip05Verified by nip05VerificationAsAState(user.info!!, user.pubkeyHex)
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            if (nip05Verified == null) {
+                Icon(
+                    tint = Color.Yellow,
+                    imageVector = Icons.Default.Downloading,
+                    contentDescription = "Downloading",
+                    modifier = Modifier.size(16.dp)
+                )
+            } else if (nip05Verified == true) {
+                Icon(
+                    painter = painterResource(R.drawable.ic_verified),
+                    "NIP-05 Verified",
+                    tint = Nip05,
+                    modifier = Modifier.size(16.dp)
+                )
+            } else {
+                Icon(
+                    tint = Color.Red,
+                    imageVector = Icons.Default.Report,
+                    contentDescription = "Invalid Nip05",
+                    modifier = Modifier.size(16.dp)
+                )
+            }
+
+            Text(
+                text = AnnotatedString(nip05.split("@")[0] + "@"),
+                modifier = Modifier.padding(top = 1.dp, bottom = 1.dp, start = 5.dp)
+            )
+
+            ClickableText(
+                text = AnnotatedString(nip05.split("@")[1]),
+                onClick = { nip05.let { runCatching { uri.openUri("https://${it.split("@")[1]}") } } },
+                style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary),
+                modifier = Modifier.padding(top = 1.dp, bottom = 1.dp)
+            )
+        }
+    }
+}
+
 @Composable
 private fun DrawBanner(baseUser: User) {
     val userState by baseUser.live().metadata.observeAsState()

app/src/main/java/com/vitorpamplona/amethyst/ui/theme/Color.kt

@@ -9,5 +9,6 @@ val Teal200 = Color(0xFF03DAC5)
 val BitcoinOrange = Color (0xFFF7931A)
 
 val Following = Color(0xFF03DAC5)
+val Nip05 = Color(0xFF01BAFF)
 val FollowsFollow = Color.Yellow
 val NIP05Verified = Color.Blue