Fill in payments by scanning a QR code or picking one from photos

apps/ios/Koins/Views/DashboardViews.swift

@@ -1,3 +1,4 @@
+import PhotosUI
 import SwiftUI
 
 struct DashboardView: View {
@@ -124,6 +125,9 @@ struct SendView: View {
   @State private var tag = ""
   @State private var priority: TransactionPriority = .defaultPriority
   @State private var localError: String?
+  @State private var status: String?
+  @State private var showScanner = false
+  @State private var photoItem: PhotosPickerItem?
 
   var body: some View {
     VStack(alignment: .leading, spacing: 18) {
@@ -131,6 +135,20 @@ struct SendView: View {
                    subtitle: "Balance \(model.balance.total) \(model.symbol)",
                    onBack: { route = .home })
 
+      HStack(spacing: 10) {
+        SecondaryButton(title: "Scan QR") { showScanner = true }
+        PhotosPicker(selection: $photoItem, matching: .images, photoLibrary: .shared()) {
+          Text("Photo")
+            .font(.system(size: 15, weight: .medium))
+            .frame(maxWidth: .infinity)
+            .padding(.vertical, 14)
+            .background(Theme.surface)
+            .foregroundStyle(Theme.text)
+            .overlay(RoundedRectangle(cornerRadius: 14, style: .continuous).stroke(Theme.border))
+            .clipShape(RoundedRectangle(cornerRadius: 14, style: .continuous))
+        }
+      }
+
       VStack(alignment: .leading, spacing: 6) {
         FieldLabel(text: model.chain == .xrp ? "Destination address" : "Recipient address")
         KoinsTextField(placeholder: model.chain == .xrp ? "r…" : "4…", text: $destination)
@@ -163,6 +181,9 @@ struct SendView: View {
       if let message = localError ?? model.errorMessage {
         MessageBanner(message: message, isError: true)
       }
+      if let message = status {
+        MessageBanner(message: message, isError: false)
+      }
       if let message = model.statusMessage {
         MessageBanner(message: message, isError: false)
       }
@@ -184,6 +205,65 @@ struct SendView: View {
 
       Spacer(minLength: 0)
     }
+    .sheet(isPresented: $showScanner) {
+      QRScannerView(onScan: { value in
+        showScanner = false
+        applyScanned(value)
+      }, onCancel: {
+        showScanner = false
+      })
+      .ignoresSafeArea()
+    }
+    .onChange(of: photoItem) { item in
+      guard let item else { return }
+      Task {
+        if let data = try? await item.loadTransferable(type: Data.self) {
+          if let value = QRCodeReader.decodeText(in: data) {
+            applyScanned(value)
+          } else {
+            localError = "No QR code found in that image"
+          }
+        } else {
+          localError = "That image could not be read"
+        }
+        photoItem = nil
+      }
+    }
+  }
+
+  /// Fills the form from a scanned code, accepting both plain addresses and
+  /// wallet payment URIs (`monero:…?tx_amount=`, `ripple:…?amount=&dt=`).
+  private func applyScanned(_ value: String) {
+    localError = nil
+    status = nil
+    guard let payload = QRCodeReader.parse(value) else {
+      localError = "That QR code is not a payment request"
+      return
+    }
+
+    let isForThisChain = model.chain == .xrp
+      ? AddressFormat.isXRP(payload.address)
+      : AddressFormat.isMonero(payload.address)
+    guard isForThisChain else {
+      localError = model.chain == .xrp
+        ? "That looks like a Monero address. Switch to Monero to use it."
+        : "That looks like an XRP address. Switch to XRP to use it."
+      return
+    }
+
+    destination = payload.address
+    if let scannedAmount = payload.amount, !scannedAmount.isEmpty {
+      amount = scannedAmount
+    }
+    if model.chain == .xrp, let scannedTag = payload.tag {
+      tag = String(scannedTag)
+    }
+
+    var filled: [String] = ["address"]
+    if payload.amount?.isEmpty == false { filled.append("amount") }
+    if payload.tag != nil { filled.append("tag") }
+    if payload.paymentId?.isEmpty == false { filled.append("payment ID") }
+    status = "Filled \(filled.joined(separator: ", ")) from the QR code"
   }
 }