Sending Lightning Tips

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

@@ -0,0 +1,106 @@
+package com.vitorpamplona.amethyst.lnurl
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import kotlin.math.ln
+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 LightningAddressResolver {
+  val client = OkHttpClient.Builder().build()
+
+  fun assembleUrl(lnaddress: String): String? {
+    val parts = lnaddress.split("@")
+
+    if (parts.size != 2) {
+      return null
+    }
+
+    return "https://${parts[1]}/.well-known/lnurlp/${parts[0]}"
+  }
+
+  fun fetchLightningAddressJson(lnaddress: String, onSucess: (String) -> Unit) {
+    val scope = CoroutineScope(Job() + Dispatchers.IO)
+    scope.launch {
+      fetchLightningAddressJsonSuspend(lnaddress, onSucess)
+    }
+  }
+
+  private suspend fun fetchLightningAddressJsonSuspend(lnaddress: String, onSucess: (String) -> Unit) {
+    val url = assembleUrl(lnaddress) ?: 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 {
+            onSucess(response.body.string())
+          }
+        }
+
+        override fun onFailure(call: Call, e: java.io.IOException) {
+          e.printStackTrace()
+        }
+      })
+    }
+  }
+
+  fun fetchLightningInvoice(lnCallback: String, milliSats: Long, message: String, onSucess: (String) -> Unit) {
+    val scope = CoroutineScope(Job() + Dispatchers.IO)
+    scope.launch {
+      fetchLightningInvoiceSuspend(lnCallback, milliSats, message, onSucess)
+    }
+  }
+
+  private suspend fun fetchLightningInvoiceSuspend(lnCallback: String, milliSats: Long, message: String, onSucess: (String) -> Unit) {
+    val urlBinder = if (lnCallback.contains("?")) "&" else "?"
+    val url = "$lnCallback${urlBinder}amount=$milliSats&comment=$message"
+
+    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 {
+            onSucess(response.body.string())
+          }
+        }
+
+        override fun onFailure(call: Call, e: java.io.IOException) {
+          e.printStackTrace()
+        }
+      })
+    }
+  }
+
+  fun lnAddressToLnUrl(lnaddress: String, onSucess: (String) -> Unit) {
+    fetchLightningAddressJson(lnaddress) {
+      onSucess(Bech32.encodeBytes("lnurl",it.toByteArray(), Bech32.Encoding.Bech32))
+    }
+  }
+
+  fun lnAddressInvoice(lnaddress: String, milliSats: Long, message: String, onSucess: (String) -> Unit) {
+    val mapper = jacksonObjectMapper()
+
+    fetchLightningAddressJson(lnaddress) {
+      mapper.readTree(it)?.get("callback")?.asText()?.let { callback ->
+        fetchLightningInvoice(callback, milliSats, message,
+          onSucess = {
+            mapper.readTree(it)?.get("pr")?.asText()?.let { pr ->
+              onSucess(pr)
+            }
+          }
+        )
+      }
+    }
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/components/InvoicePreview.kt

@@ -9,13 +9,20 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material.Button
 import androidx.compose.material.ButtonDefaults
 import androidx.compose.material.Divider
 import androidx.compose.material.Icon
+import androidx.compose.material.LocalTextStyle
 import androidx.compose.material.MaterialTheme
+import androidx.compose.material.OutlinedTextField
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -23,11 +30,15 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.KeyboardCapitalization
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.style.TextDirection
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.core.content.ContextCompat.startActivity
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.lnurl.LnInvoiceUtil
+import java.text.NumberFormat
 
 @Composable
 fun InvoicePreview(lnInvoice: String) {
@@ -78,14 +89,15 @@ fun InvoicePreview(lnInvoice: String) {
 
       amount?.let {
         Text(
-          text = "${amount.toInt()} sats",
+          text = "${NumberFormat.getInstance().format(amount)} sats",
           fontSize = 25.sp,
           fontWeight = FontWeight.W500,
           modifier = Modifier
             .fillMaxWidth()
             .padding(vertical = 10.dp),
         )
-      } 
+      }
+
 
       Button(
         modifier = Modifier.fillMaxWidth().padding(vertical = 10.dp),

app/src/main/java/com/vitorpamplona/amethyst/ui/components/InvoiceRequest.kt

@@ -0,0 +1,137 @@
+package com.vitorpamplona.amethyst.ui.components
+
+import android.content.Intent
+import android.net.Uri
+import androidx.compose.foundation.border
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.Button
+import androidx.compose.material.ButtonDefaults
+import androidx.compose.material.Divider
+import androidx.compose.material.Icon
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.OutlinedTextField
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.KeyboardCapitalization
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.core.content.ContextCompat.startActivity
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.lnurl.LightningAddressResolver
+
+@Composable
+fun InvoiceRequest(lud16: String, onClose: () -> Unit ) {
+  val context = LocalContext.current
+
+  Column(modifier = Modifier
+    .fillMaxWidth()
+    .padding(start = 30.dp, end = 30.dp)
+    .clip(shape = RoundedCornerShape(10.dp))
+    .border(1.dp, MaterialTheme.colors.onSurface.copy(alpha = 0.12f), RoundedCornerShape(15.dp))
+  ) {
+
+    Column(
+      modifier = Modifier
+        .fillMaxWidth()
+        .padding(30.dp)
+    ) {
+
+      Row(
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier
+          .fillMaxWidth()
+          .padding(bottom = 10.dp)
+      ) {
+        Icon(
+          painter = painterResource(R.drawable.lightning),
+          null,
+          modifier = Modifier.size(20.dp),
+          tint = Color.Unspecified
+        )
+
+        Text(
+          text = "Lightning Invoice",
+          fontSize = 20.sp,
+          fontWeight = FontWeight.W500,
+          modifier = Modifier.padding(start = 10.dp)
+        )
+      }
+
+      Divider()
+
+      var message by remember { mutableStateOf("") }
+      var amount by remember { mutableStateOf(1000L) }
+
+      OutlinedTextField(
+        label = { Text(text = "Note to Receiver") },
+        modifier = Modifier.fillMaxWidth(),
+        value = message,
+        onValueChange = { message = it },
+        placeholder = {
+          Text(
+            text = "Thank you so much!",
+            color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
+          )
+        },
+        keyboardOptions = KeyboardOptions.Default.copy(
+          capitalization = KeyboardCapitalization.Sentences
+        ),
+        singleLine = true
+      )
+
+      OutlinedTextField(
+        label = { Text(text = "Amount in Sats") },
+        modifier = Modifier.fillMaxWidth(),
+        value = amount.toString(),
+        onValueChange = { amount = it.toLong() },
+        placeholder = {
+          Text(
+            text = "1000",
+            color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
+          )
+        },
+        keyboardOptions = KeyboardOptions.Default.copy(
+          keyboardType = KeyboardType.Number
+        ),
+        singleLine = true
+      )
+
+      Button(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 10.dp),
+        onClick = {
+          LightningAddressResolver().lnAddressInvoice(lud16, amount * 1000, message) {
+            runCatching {
+              val intent = Intent(Intent.ACTION_VIEW, Uri.parse("lightning:$it"))
+              startActivity(context, intent, null)
+            }
+            onClose()
+          }
+        },
+        shape = RoundedCornerShape(15.dp),
+        colors = ButtonDefaults.buttonColors(
+          backgroundColor = MaterialTheme.colors.primary
+        )
+      ) {
+        Text(text = "Send", color = Color.White, fontSize = 20.sp)
+      }
+    }
+  }
+}

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

@@ -1,14 +1,20 @@
 package com.vitorpamplona.amethyst.ui.screen
 
+import android.content.Intent
+import android.net.Uri
 import androidx.compose.foundation.*
 import androidx.compose.foundation.gestures.scrollBy
 import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.selection.toggleable
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
+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.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.Share
 import androidx.compose.runtime.*
@@ -25,6 +31,7 @@ import androidx.compose.ui.layout.onSizeChanged
 import androidx.compose.ui.platform.LocalClipboardManager
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.font.FontWeight
@@ -32,6 +39,7 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.IntSize
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.core.content.ContextCompat
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import coil.compose.AsyncImage
@@ -41,6 +49,7 @@ 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.LightningAddressResolver
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.NostrUserProfileDataSource
@@ -48,8 +57,10 @@ import com.vitorpamplona.amethyst.service.NostrUserProfileFollowersDataSource
 import com.vitorpamplona.amethyst.service.NostrUserProfileFollowsDataSource
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.ui.actions.NewUserMetadataView
+import com.vitorpamplona.amethyst.ui.components.InvoiceRequest
 import com.vitorpamplona.amethyst.ui.note.UserPicture
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.theme.BitcoinOrange
 import kotlinx.coroutines.launch
 import nostr.postr.toNpub
 import nostr.postr.toNsec
@@ -301,6 +312,9 @@ private fun DrawAdditionalInfo(baseUser: User) {
     val userState by baseUser.liveMetadata.observeAsState()
     val user = userState?.user ?: return
 
+    val uri = LocalUriHandler.current
+    val context = LocalContext.current
+
     Text(
         user.bestDisplayName() ?: "",
         modifier = Modifier.padding(top = 7.dp),
@@ -308,9 +322,60 @@ private fun DrawAdditionalInfo(baseUser: User) {
         fontSize = 25.sp
     )
     Text(
-        " @${user.bestUsername()}",
-        color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
+        "@${user.bestUsername()}",
+        color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
+        modifier = Modifier.padding(top = 1.dp, bottom = 1.dp, start = 5.dp)
     )
+
+    val website = user.info.website
+    if (!website.isNullOrEmpty()) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Icon(
+                tint = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
+                imageVector = Icons.Default.Link,
+                contentDescription = "Website",
+                modifier = Modifier.size(16.dp)
+            )
+
+            ClickableText(
+                text = AnnotatedString(website.removePrefix("https://")),
+                onClick = { user.info.website?.let { uri.openUri(it) } },
+                style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary),
+                modifier = Modifier.padding(top = 1.dp, bottom = 1.dp, start = 5.dp)
+            )
+        }
+    }
+
+    var ZapExpanded by remember { mutableStateOf(false) }
+
+    val lud16 = user.info.lud16
+
+    if (!lud16.isNullOrEmpty()) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Icon(
+                tint = BitcoinOrange,
+                imageVector = Icons.Default.Bolt,
+                contentDescription = "Lightning Address",
+                modifier = Modifier.size(16.dp)
+            )
+
+            ClickableText(
+                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)
+            )
+        }
+
+        if (ZapExpanded) {
+            Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.padding(vertical = 5.dp)) {
+                InvoiceRequest(lud16) {
+                    ZapExpanded = false
+                }
+            }
+        }
+    }
+
     Text(
         "${user.info.about}",
         color = MaterialTheme.colors.onSurface,

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

@@ -6,6 +6,7 @@ val Purple200 = Color(0xFFBB86FC)
 val Purple500 = Color(0xFF6200EE)
 val Purple700 = Color(0xFF3700B3)
 val Teal200 = Color(0xFF03DAC5)
+val BitcoinOrange = Color (0xFFF7931A)
 
 val Following = Color(0xFF03DAC5)
 val FollowsFollow = Color.Yellow