qml: swap: like on desktop, use pkh of nostr pubkey as color

electrum/gui/qml/components/NostrSwapServersDialog.qml

@@ -87,10 +87,13 @@ ElDialog {
                                 Layout.preferredHeight: constants.paddingLarge
                                 Layout.preferredWidth: 1
                             }
-                            Image {
+                            Rectangle {
                                 Layout.rowSpan: 5
-                                Layout.alignment: Qt.AlignTop
+                                Layout.alignment: Qt.AlignVCenter
-                                source: Qt.resolvedUrl('../../icons/network.png')
+                                Layout.fillHeight: true
+                                Layout.preferredWidth: 10
+                                color: model.color
+
                             }
                             Label {
                                 text: qsTr('Pubkey')
@@ -118,6 +121,7 @@ ElDialog {
                             Label {
                                 Layout.fillWidth: true
                                 text: model.timestamp
+                                wrapMode: Text.Wrap
                             }
                             Label {
                                 text: qsTr('Max Forward')

electrum/gui/qml/qeswaphelper.py

@@ -5,6 +5,7 @@ from typing import Union, Optional, TYPE_CHECKING, Sequence
 
 from PyQt6.QtCore import (pyqtProperty, pyqtSignal, pyqtSlot, QObject, QTimer, pyqtEnum, QAbstractListModel, Qt,
                           QModelIndex)
+from PyQt6.QtGui import QColor
 
 from electrum.i18n import _
 from electrum.bitcoin import DummyAddress
@@ -14,6 +15,7 @@ from electrum.util import (NotEnoughFunds, NoDynamicFeeEstimates, profiler, get_
                            wait_for2)
 from electrum.submarine_swaps import NostrTransport, SwapServerTransport
 from electrum.fee_policy import FeePolicy
+from electrum.crypto import sha256
 
 from electrum.gui import messages
 
@@ -34,7 +36,7 @@ class QESwapServerNPubListModel(QAbstractListModel):
 
     # define listmodel rolemap
     _ROLE_NAMES= ('npub', 'server_pubkey', 'timestamp', 'percentage_fee', 'mining_fee',
-                  'min_amount', 'max_forward_amount', 'max_reverse_amount', 'pow_bits')
+                  'min_amount', 'max_forward_amount', 'max_reverse_amount', 'pow_bits', 'color')
     _ROLE_KEYS = range(Qt.ItemDataRole.UserRole, Qt.ItemDataRole.UserRole + len(_ROLE_NAMES))
     _ROLE_MAP  = dict(zip(_ROLE_KEYS, [bytearray(x.encode()) for x in _ROLE_NAMES]))
 
@@ -59,7 +61,7 @@ class QESwapServerNPubListModel(QAbstractListModel):
         service = self._services[index.row()]
         role_index = role - Qt.ItemDataRole.UserRole
         value = service[self._ROLE_NAMES[role_index]]
-        if isinstance(value, (bool, list, int, str)) or value is None:
+        if isinstance(value, (bool, list, int, str, QColor)) or value is None:
             return value
         return str(value)
 
@@ -68,6 +70,14 @@ class QESwapServerNPubListModel(QAbstractListModel):
         self._services = []
         self.endResetModel()
 
+    @staticmethod
+    def str_to_color(color_input: str) -> QColor:
+        input_hash = int.from_bytes(sha256(color_input), byteorder="big")
+        r = (input_hash & 0xFF0000) >> 16
+        g = (input_hash & 0x00FF00) >> 8
+        b = input_hash & 0x0000FF
+        return QColor(r, g, b)
+
     def offer_to_model(self, x: 'SwapOffer'):
         return {
             'npub': x.server_npub,
@@ -79,6 +89,7 @@ class QESwapServerNPubListModel(QAbstractListModel):
             'max_reverse_amount': x.pairs.max_reverse,
             'timestamp': age(x.timestamp),
             'pow_bits': x.pow_bits,
+            'color': self.str_to_color(x.server_pubkey),
         }
 
     def updateModel(self, items: Sequence['SwapOffer']):