refactor(useragent::evm::grants): split into more files & flutter_form_builder usage

useragent/lib/router.gr.dart

@@ -18,7 +18,7 @@ import 'package:arbiter/screens/dashboard/clients/details/client_details.dart'
     as _i4;
 import 'package:arbiter/screens/dashboard/clients/table.dart' as _i5;
 import 'package:arbiter/screens/dashboard/evm/evm.dart' as _i9;
-import 'package:arbiter/screens/dashboard/evm/grants/grant_create.dart' as _i6;
+import 'package:arbiter/screens/dashboard/evm/grants/create/screen.dart' as _i6;
 import 'package:arbiter/screens/dashboard/evm/grants/grants.dart' as _i8;
 import 'package:arbiter/screens/server_connection.dart' as _i10;
 import 'package:arbiter/screens/server_info_setup.dart' as _i11;

useragent/lib/screens/dashboard/evm/grants/create/fields/chain_id_field.dart

@@ -0,0 +1,21 @@
+// lib/screens/dashboard/evm/grants/create/fields/chain_id_field.dart
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+
+class ChainIdField extends StatelessWidget {
+  const ChainIdField({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return FormBuilderTextField(
+      name: 'chainId',
+      initialValue: '1',
+      keyboardType: TextInputType.number,
+      decoration: const InputDecoration(
+        labelText: 'Chain ID',
+        hintText: '1',
+        border: OutlineInputBorder(),
+      ),
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/fields/client_picker_field.dart

@@ -0,0 +1,38 @@
+// lib/screens/dashboard/evm/grants/create/fields/client_picker_field.dart
+import 'package:arbiter/proto/user_agent.pb.dart';
+import 'package:arbiter/providers/sdk_clients/list.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/provider.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+class ClientPickerField extends ConsumerWidget {
+  const ClientPickerField({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final clients =
+        ref.watch(sdkClientsProvider).asData?.value ?? const <SdkClientEntry>[];
+
+    return FormBuilderDropdown<int>(
+      name: 'clientId',
+      decoration: const InputDecoration(
+        labelText: 'Client',
+        border: OutlineInputBorder(),
+      ),
+      items: [
+        for (final c in clients)
+          DropdownMenuItem(
+            value: c.id,
+            child: Text(c.info.name.isEmpty ? 'Client #${c.id}' : c.info.name),
+          ),
+      ],
+      onChanged: clients.isEmpty
+          ? null
+          : (value) {
+              ref.read(grantCreationProvider.notifier).setClientId(value);
+              FormBuilder.of(context)?.fields['walletAccessId']?.didChange(null);
+            },
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/fields/date_time_field.dart

@@ -0,0 +1,61 @@
+// lib/screens/dashboard/evm/grants/create/fields/date_time_field.dart
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:sizer/sizer.dart';
+
+/// A [FormBuilderField] that opens a date picker followed by a time picker.
+/// Long-press clears the value.
+class FormBuilderDateTimeField extends FormBuilderField<DateTime?> {
+  final String label;
+
+  FormBuilderDateTimeField({
+    super.key,
+    required super.name,
+    required this.label,
+    super.initialValue,
+    super.onChanged,
+    super.validator,
+  }) : super(
+          builder: (FormFieldState<DateTime?> field) {
+            final value = field.value;
+            return OutlinedButton(
+              onPressed: () async {
+                final ctx = field.context;
+                final now = DateTime.now();
+                final date = await showDatePicker(
+                  context: ctx,
+                  firstDate: DateTime(now.year - 5),
+                  lastDate: DateTime(now.year + 10),
+                  initialDate: value ?? now,
+                );
+                if (date == null) return;
+                if (!ctx.mounted) return;
+                final time = await showTimePicker(
+                  context: ctx,
+                  initialTime: TimeOfDay.fromDateTime(value ?? now),
+                );
+                if (time == null) return;
+                field.didChange(DateTime(
+                  date.year,
+                  date.month,
+                  date.day,
+                  time.hour,
+                  time.minute,
+                ));
+              },
+              onLongPress: value == null ? null : () => field.didChange(null),
+              child: Padding(
+                padding: EdgeInsets.symmetric(vertical: 1.8.h),
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(label),
+                    SizedBox(height: 0.6.h),
+                    Text(value?.toLocal().toString() ?? 'Not set'),
+                  ],
+                ),
+              ),
+            );
+          },
+        );
+}

useragent/lib/screens/dashboard/evm/grants/create/fields/gas_fee_options_field.dart

@@ -0,0 +1,39 @@
+// lib/screens/dashboard/evm/grants/create/fields/gas_fee_options_field.dart
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:sizer/sizer.dart';
+
+class GasFeeOptionsField extends StatelessWidget {
+  const GasFeeOptionsField({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      children: [
+        Expanded(
+          child: FormBuilderTextField(
+            name: 'maxGasFeePerGas',
+            keyboardType: TextInputType.number,
+            decoration: const InputDecoration(
+              labelText: 'Max gas fee / gas',
+              hintText: '1000000000',
+              border: OutlineInputBorder(),
+            ),
+          ),
+        ),
+        SizedBox(width: 1.w),
+        Expanded(
+          child: FormBuilderTextField(
+            name: 'maxPriorityFeePerGas',
+            keyboardType: TextInputType.number,
+            decoration: const InputDecoration(
+              labelText: 'Max priority fee / gas',
+              hintText: '100000000',
+              border: OutlineInputBorder(),
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/fields/transaction_rate_limit_field.dart

@@ -0,0 +1,39 @@
+// lib/screens/dashboard/evm/grants/create/fields/transaction_rate_limit_field.dart
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:sizer/sizer.dart';
+
+class TransactionRateLimitField extends StatelessWidget {
+  const TransactionRateLimitField({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      children: [
+        Expanded(
+          child: FormBuilderTextField(
+            name: 'txCount',
+            keyboardType: TextInputType.number,
+            decoration: const InputDecoration(
+              labelText: 'Tx count limit',
+              hintText: '10',
+              border: OutlineInputBorder(),
+            ),
+          ),
+        ),
+        SizedBox(width: 1.w),
+        Expanded(
+          child: FormBuilderTextField(
+            name: 'txWindow',
+            keyboardType: TextInputType.number,
+            decoration: const InputDecoration(
+              labelText: 'Window (seconds)',
+              hintText: '3600',
+              border: OutlineInputBorder(),
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/fields/validity_window_field.dart

@@ -0,0 +1,29 @@
+// lib/screens/dashboard/evm/grants/create/fields/validity_window_field.dart
+import 'package:arbiter/screens/dashboard/evm/grants/create/fields/date_time_field.dart';
+import 'package:flutter/material.dart';
+import 'package:sizer/sizer.dart';
+
+class ValidityWindowField extends StatelessWidget {
+  const ValidityWindowField({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      children: [
+        Expanded(
+          child: FormBuilderDateTimeField(
+            name: 'validFrom',
+            label: 'Valid from',
+          ),
+        ),
+        SizedBox(width: 1.w),
+        Expanded(
+          child: FormBuilderDateTimeField(
+            name: 'validUntil',
+            label: 'Valid until',
+          ),
+        ),
+      ],
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/fields/wallet_access_picker_field.dart

@@ -0,0 +1,57 @@
+// lib/screens/dashboard/evm/grants/create/fields/wallet_access_picker_field.dart
+import 'package:arbiter/proto/evm.pb.dart';
+import 'package:arbiter/proto/user_agent.pb.dart';
+import 'package:arbiter/providers/evm/evm.dart';
+import 'package:arbiter/providers/sdk_clients/wallet_access_list.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/provider.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/utils.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+class WalletAccessPickerField extends ConsumerWidget {
+  const WalletAccessPickerField({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final state = ref.watch(grantCreationProvider);
+    final allAccesses =
+        ref.watch(walletAccessListProvider).asData?.value ??
+        const <SdkClientWalletAccess>[];
+    final wallets =
+        ref.watch(evmProvider).asData?.value ?? const <WalletEntry>[];
+
+    final walletById = <int, WalletEntry>{for (final w in wallets) w.id: w};
+    final accesses = state.selectedClientId == null
+        ? const <SdkClientWalletAccess>[]
+        : allAccesses
+              .where((a) => a.access.sdkClientId == state.selectedClientId)
+              .toList();
+
+    return FormBuilderDropdown<int>(
+      name: 'walletAccessId',
+      enabled: accesses.isNotEmpty,
+      decoration: InputDecoration(
+        labelText: 'Wallet access',
+        helperText: state.selectedClientId == null
+            ? 'Select a client first'
+            : accesses.isEmpty
+                ? 'No wallet accesses for this client'
+                : null,
+        border: const OutlineInputBorder(),
+      ),
+      items: [
+        for (final a in accesses)
+          DropdownMenuItem(
+            value: a.id,
+            child: Text(() {
+              final wallet = walletById[a.access.walletId];
+              return wallet != null
+                  ? shortAddress(wallet.address)
+                  : 'Wallet #${a.access.walletId}';
+            }()),
+          ),
+      ],
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/grants/ether_transfer_grant.dart

@@ -0,0 +1,225 @@
+// lib/screens/dashboard/evm/grants/create/grants/ether_transfer_grant.dart
+import 'package:arbiter/proto/evm.pb.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/grants/grant_form_handler.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/utils.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:sizer/sizer.dart';
+
+part 'ether_transfer_grant.g.dart';
+
+class EtherTargetEntry {
+  EtherTargetEntry({required this.id, this.address = ''});
+
+  final int id;
+  final String address;
+
+  EtherTargetEntry copyWith({String? address}) =>
+      EtherTargetEntry(id: id, address: address ?? this.address);
+}
+
+@riverpod
+class EtherGrantTargets extends _$EtherGrantTargets {
+  int _nextId = 0;
+  int _newId() => _nextId++;
+
+  @override
+  List<EtherTargetEntry> build() => [EtherTargetEntry(id: _newId())];
+
+  void add() => state = [...state, EtherTargetEntry(id: _newId())];
+
+  void update(int index, EtherTargetEntry entry) {
+    final updated = [...state];
+    updated[index] = entry;
+    state = updated;
+  }
+
+  void remove(int index) => state = [...state]..removeAt(index);
+}
+
+class EtherTransferGrantHandler implements GrantFormHandler {
+  const EtherTransferGrantHandler();
+
+  @override
+  Widget buildForm(BuildContext context, WidgetRef ref) =>
+      const _EtherTransferForm();
+
+  @override
+  SpecificGrant buildSpecificGrant(
+    Map<String, dynamic> formValues,
+    WidgetRef ref,
+  ) {
+    final targets = ref.read(etherGrantTargetsProvider);
+
+    return SpecificGrant(
+      etherTransfer: EtherTransferSettings(
+        targets: targets
+            .where((e) => e.address.trim().isNotEmpty)
+            .map((e) => parseHexAddress(e.address))
+            .toList(),
+        limit: buildVolumeLimit(
+          formValues['etherVolume'] as String? ?? '',
+          formValues['etherVolumeWindow'] as String? ?? '',
+        ),
+      ),
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Form widget
+// ---------------------------------------------------------------------------
+
+class _EtherTransferForm extends ConsumerWidget {
+  const _EtherTransferForm();
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final targets = ref.watch(etherGrantTargetsProvider);
+    final notifier = ref.read(etherGrantTargetsProvider.notifier);
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: [
+        _EtherTargetsField(
+          values: targets,
+          onAdd: notifier.add,
+          onUpdate: notifier.update,
+          onRemove: notifier.remove,
+        ),
+        SizedBox(height: 1.6.h),
+        Text(
+          'Ether volume limit',
+          style: Theme.of(context).textTheme.labelLarge?.copyWith(
+                fontWeight: FontWeight.w800,
+              ),
+        ),
+        SizedBox(height: 0.8.h),
+        Row(
+          children: [
+            Expanded(
+              child: FormBuilderTextField(
+                name: 'etherVolume',
+                keyboardType: TextInputType.number,
+                decoration: const InputDecoration(
+                  labelText: 'Max volume',
+                  hintText: '1000000000000000000',
+                  border: OutlineInputBorder(),
+                ),
+              ),
+            ),
+            SizedBox(width: 1.w),
+            Expanded(
+              child: FormBuilderTextField(
+                name: 'etherVolumeWindow',
+                keyboardType: TextInputType.number,
+                decoration: const InputDecoration(
+                  labelText: 'Window (seconds)',
+                  hintText: '86400',
+                  border: OutlineInputBorder(),
+                ),
+              ),
+            ),
+          ],
+        ),
+      ],
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Targets list widget
+// ---------------------------------------------------------------------------
+
+class _EtherTargetsField extends StatelessWidget {
+  const _EtherTargetsField({
+    required this.values,
+    required this.onAdd,
+    required this.onUpdate,
+    required this.onRemove,
+  });
+
+  final List<EtherTargetEntry> values;
+  final VoidCallback onAdd;
+  final void Function(int index, EtherTargetEntry entry) onUpdate;
+  final void Function(int index) onRemove;
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Row(
+          children: [
+            Expanded(
+              child: Text(
+                'Ether targets',
+                style: Theme.of(context).textTheme.labelLarge?.copyWith(
+                      fontWeight: FontWeight.w800,
+                    ),
+              ),
+            ),
+            TextButton.icon(
+              onPressed: onAdd,
+              icon: const Icon(Icons.add_rounded),
+              label: const Text('Add'),
+            ),
+          ],
+        ),
+        SizedBox(height: 0.8.h),
+        for (var i = 0; i < values.length; i++)
+          Padding(
+            padding: EdgeInsets.only(bottom: 1.h),
+            child: _EtherTargetRow(
+              key: ValueKey(values[i].id),
+              value: values[i],
+              onChanged: (entry) => onUpdate(i, entry),
+              onRemove: values.length == 1 ? null : () => onRemove(i),
+            ),
+          ),
+      ],
+    );
+  }
+}
+
+class _EtherTargetRow extends HookWidget {
+  const _EtherTargetRow({
+    super.key,
+    required this.value,
+    required this.onChanged,
+    required this.onRemove,
+  });
+
+  final EtherTargetEntry value;
+  final ValueChanged<EtherTargetEntry> onChanged;
+  final VoidCallback? onRemove;
+
+  @override
+  Widget build(BuildContext context) {
+    final addressController = useTextEditingController(text: value.address);
+
+    return Row(
+      children: [
+        Expanded(
+          child: TextField(
+            controller: addressController,
+            onChanged: (next) => onChanged(value.copyWith(address: next)),
+            decoration: const InputDecoration(
+              labelText: 'Address',
+              hintText: '0x...',
+              border: OutlineInputBorder(),
+            ),
+          ),
+        ),
+        SizedBox(width: 0.4.w),
+        IconButton(
+          onPressed: onRemove,
+          icon: const Icon(Icons.remove_circle_outline_rounded),
+        ),
+      ],
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/grants/ether_transfer_grant.g.dart

@@ -0,0 +1,63 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'ether_transfer_grant.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint, type=warning
+
+@ProviderFor(EtherGrantTargets)
+final etherGrantTargetsProvider = EtherGrantTargetsProvider._();
+
+final class EtherGrantTargetsProvider
+    extends $NotifierProvider<EtherGrantTargets, List<EtherTargetEntry>> {
+  EtherGrantTargetsProvider._()
+    : super(
+        from: null,
+        argument: null,
+        retry: null,
+        name: r'etherGrantTargetsProvider',
+        isAutoDispose: true,
+        dependencies: null,
+        $allTransitiveDependencies: null,
+      );
+
+  @override
+  String debugGetCreateSourceHash() => _$etherGrantTargetsHash();
+
+  @$internal
+  @override
+  EtherGrantTargets create() => EtherGrantTargets();
+
+  /// {@macro riverpod.override_with_value}
+  Override overrideWithValue(List<EtherTargetEntry> value) {
+    return $ProviderOverride(
+      origin: this,
+      providerOverride: $SyncValueProvider<List<EtherTargetEntry>>(value),
+    );
+  }
+}
+
+String _$etherGrantTargetsHash() => r'063aa3180d5e5bbc1525702272686f1fd8ca751d';
+
+abstract class _$EtherGrantTargets extends $Notifier<List<EtherTargetEntry>> {
+  List<EtherTargetEntry> build();
+  @$mustCallSuper
+  @override
+  void runBuild() {
+    final ref =
+        this.ref as $Ref<List<EtherTargetEntry>, List<EtherTargetEntry>>;
+    final element =
+        ref.element
+            as $ClassProviderElement<
+              AnyNotifier<List<EtherTargetEntry>, List<EtherTargetEntry>>,
+              List<EtherTargetEntry>,
+              Object?,
+              Object?
+            >;
+    element.handleCreate(ref, build);
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/grants/grant_form_handler.dart

@@ -0,0 +1,26 @@
+// lib/screens/dashboard/evm/grants/create/grants/grant_form_handler.dart
+import 'package:arbiter/proto/evm.pb.dart';
+import 'package:flutter/widgets.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+abstract class GrantFormHandler {
+  /// Renders the grant-specific form section.
+  ///
+  /// The returned widget must be a descendant of the [FormBuilder] in the
+  /// screen so its [FormBuilderField] children register automatically.
+  ///
+  /// **Field name contract:** All `name:` values used by this handler must be
+  /// unique across ALL [GrantFormHandler] implementations. [FormBuilder]
+  /// retains field state across handler switches, so name collisions cause
+  /// silent data corruption.
+  Widget buildForm(BuildContext context, WidgetRef ref);
+
+  /// Assembles a [SpecificGrant] proto.
+  ///
+  /// [formValues] — `formKey.currentState!.value` after `saveAndValidate()`.
+  /// [ref] — read any provider the handler owns (e.g. token volume limits).
+  SpecificGrant buildSpecificGrant(
+    Map<String, dynamic> formValues,
+    WidgetRef ref,
+  );
+}

useragent/lib/screens/dashboard/evm/grants/create/grants/token_transfer_grant.dart

@@ -0,0 +1,233 @@
+// lib/screens/dashboard/evm/grants/create/grants/token_transfer_grant.dart
+import 'package:arbiter/proto/evm.pb.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/grants/grant_form_handler.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/utils.dart';
+import 'package:fixnum/fixnum.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:sizer/sizer.dart';
+
+part 'token_transfer_grant.g.dart';
+
+class VolumeLimitEntry {
+  VolumeLimitEntry({required this.id, this.amount = '', this.windowSeconds = ''});
+
+  final int id;
+  final String amount;
+  final String windowSeconds;
+
+  VolumeLimitEntry copyWith({String? amount, String? windowSeconds}) =>
+      VolumeLimitEntry(
+        id: id,
+        amount: amount ?? this.amount,
+        windowSeconds: windowSeconds ?? this.windowSeconds,
+      );
+}
+
+
+@riverpod
+class TokenGrantLimits extends _$TokenGrantLimits {
+  int _nextId = 0;
+  int _newId() => _nextId++;
+
+  @override
+  List<VolumeLimitEntry> build() => [VolumeLimitEntry(id: _newId())];
+
+  void add() => state = [...state, VolumeLimitEntry(id: _newId())];
+
+  void update(int index, VolumeLimitEntry entry) {
+    final updated = [...state];
+    updated[index] = entry;
+    state = updated;
+  }
+
+  void remove(int index) => state = [...state]..removeAt(index);
+}
+
+
+class TokenTransferGrantHandler implements GrantFormHandler {
+  const TokenTransferGrantHandler();
+
+  @override
+  Widget buildForm(BuildContext context, WidgetRef ref) =>
+      const _TokenTransferForm();
+
+  @override
+  SpecificGrant buildSpecificGrant(
+    Map<String, dynamic> formValues,
+    WidgetRef ref,
+  ) {
+    final limits = ref.read(tokenGrantLimitsProvider);
+    final targetText = formValues['tokenTarget'] as String? ?? '';
+
+    return SpecificGrant(
+      tokenTransfer: TokenTransferSettings(
+        tokenContract:
+            parseHexAddress(formValues['tokenContract'] as String? ?? ''),
+        target: targetText.trim().isEmpty ? null : parseHexAddress(targetText),
+        volumeLimits: limits
+            .where((e) => e.amount.trim().isNotEmpty && e.windowSeconds.trim().isNotEmpty)
+            .map(
+              (e) => VolumeRateLimit(
+                maxVolume: parseBigIntBytes(e.amount),
+                windowSecs: Int64.parseInt(e.windowSeconds),
+              ),
+            )
+            .toList(),
+      ),
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Form widget
+// ---------------------------------------------------------------------------
+
+class _TokenTransferForm extends ConsumerWidget {
+  const _TokenTransferForm();
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final limits = ref.watch(tokenGrantLimitsProvider);
+    final notifier = ref.read(tokenGrantLimitsProvider.notifier);
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: [
+        FormBuilderTextField(
+          name: 'tokenContract',
+          decoration: const InputDecoration(
+            labelText: 'Token contract',
+            hintText: '0x...',
+            border: OutlineInputBorder(),
+          ),
+        ),
+        SizedBox(height: 1.6.h),
+        FormBuilderTextField(
+          name: 'tokenTarget',
+          decoration: const InputDecoration(
+            labelText: 'Token recipient',
+            hintText: '0x... or leave empty for any recipient',
+            border: OutlineInputBorder(),
+          ),
+        ),
+        SizedBox(height: 1.6.h),
+        _TokenVolumeLimitsField(
+          values: limits,
+          onAdd: notifier.add,
+          onUpdate: notifier.update,
+          onRemove: notifier.remove,
+        ),
+      ],
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Volume limits list widget
+// ---------------------------------------------------------------------------
+
+class _TokenVolumeLimitsField extends StatelessWidget {
+  const _TokenVolumeLimitsField({
+    required this.values,
+    required this.onAdd,
+    required this.onUpdate,
+    required this.onRemove,
+  });
+
+  final List<VolumeLimitEntry> values;
+  final VoidCallback onAdd;
+  final void Function(int index, VolumeLimitEntry entry) onUpdate;
+  final void Function(int index) onRemove;
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Row(
+          children: [
+            Expanded(
+              child: Text(
+                'Token volume limits',
+                style: Theme.of(context).textTheme.labelLarge?.copyWith(
+                      fontWeight: FontWeight.w800,
+                    ),
+              ),
+            ),
+            TextButton.icon(
+              onPressed: onAdd,
+              icon: const Icon(Icons.add_rounded),
+              label: const Text('Add'),
+            ),
+          ],
+        ),
+        SizedBox(height: 0.8.h),
+        for (var i = 0; i < values.length; i++)
+          Padding(
+            padding: EdgeInsets.only(bottom: 1.h),
+            child: _TokenVolumeLimitRow(
+              key: ValueKey(values[i].id),
+              value: values[i],
+              onChanged: (entry) => onUpdate(i, entry),
+              onRemove: values.length == 1 ? null : () => onRemove(i),
+            ),
+          ),
+      ],
+    );
+  }
+}
+
+class _TokenVolumeLimitRow extends HookWidget {
+  const _TokenVolumeLimitRow({
+    super.key,
+    required this.value,
+    required this.onChanged,
+    required this.onRemove,
+  });
+
+  final VolumeLimitEntry value;
+  final ValueChanged<VolumeLimitEntry> onChanged;
+  final VoidCallback? onRemove;
+
+  @override
+  Widget build(BuildContext context) {
+    final amountController = useTextEditingController(text: value.amount);
+    final windowController = useTextEditingController(text: value.windowSeconds);
+
+    return Row(
+      children: [
+        Expanded(
+          child: TextField(
+            controller: amountController,
+            onChanged: (next) => onChanged(value.copyWith(amount: next)),
+            decoration: const InputDecoration(
+              labelText: 'Max volume',
+              border: OutlineInputBorder(),
+            ),
+          ),
+        ),
+        SizedBox(width: 1.w),
+        Expanded(
+          child: TextField(
+            controller: windowController,
+            onChanged: (next) =>
+                onChanged(value.copyWith(windowSeconds: next)),
+            decoration: const InputDecoration(
+              labelText: 'Window (seconds)',
+              border: OutlineInputBorder(),
+            ),
+          ),
+        ),
+        SizedBox(width: 0.4.w),
+        IconButton(
+          onPressed: onRemove,
+          icon: const Icon(Icons.remove_circle_outline_rounded),
+        ),
+      ],
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/grants/token_transfer_grant.g.dart

@@ -0,0 +1,63 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'token_transfer_grant.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint, type=warning
+
+@ProviderFor(TokenGrantLimits)
+final tokenGrantLimitsProvider = TokenGrantLimitsProvider._();
+
+final class TokenGrantLimitsProvider
+    extends $NotifierProvider<TokenGrantLimits, List<VolumeLimitEntry>> {
+  TokenGrantLimitsProvider._()
+    : super(
+        from: null,
+        argument: null,
+        retry: null,
+        name: r'tokenGrantLimitsProvider',
+        isAutoDispose: true,
+        dependencies: null,
+        $allTransitiveDependencies: null,
+      );
+
+  @override
+  String debugGetCreateSourceHash() => _$tokenGrantLimitsHash();
+
+  @$internal
+  @override
+  TokenGrantLimits create() => TokenGrantLimits();
+
+  /// {@macro riverpod.override_with_value}
+  Override overrideWithValue(List<VolumeLimitEntry> value) {
+    return $ProviderOverride(
+      origin: this,
+      providerOverride: $SyncValueProvider<List<VolumeLimitEntry>>(value),
+    );
+  }
+}
+
+String _$tokenGrantLimitsHash() => r'84db377f24940d215af82052e27863ab40c02b24';
+
+abstract class _$TokenGrantLimits extends $Notifier<List<VolumeLimitEntry>> {
+  List<VolumeLimitEntry> build();
+  @$mustCallSuper
+  @override
+  void runBuild() {
+    final ref =
+        this.ref as $Ref<List<VolumeLimitEntry>, List<VolumeLimitEntry>>;
+    final element =
+        ref.element
+            as $ClassProviderElement<
+              AnyNotifier<List<VolumeLimitEntry>, List<VolumeLimitEntry>>,
+              List<VolumeLimitEntry>,
+              Object?,
+              Object?
+            >;
+    element.handleCreate(ref, build);
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/provider.dart

@@ -0,0 +1,24 @@
+import 'package:arbiter/proto/evm.pb.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'provider.freezed.dart';
+part 'provider.g.dart';
+
+@freezed
+abstract class GrantCreationState with _$GrantCreationState {
+  const factory GrantCreationState({
+    int? selectedClientId,
+    @Default(SpecificGrant_Grant.etherTransfer) SpecificGrant_Grant grantType,
+  }) = _GrantCreationState;
+}
+
+@riverpod
+class GrantCreation extends _$GrantCreation {
+  @override
+  GrantCreationState build() => const GrantCreationState();
+
+  void setClientId(int? id) => state = state.copyWith(selectedClientId: id);
+  void setGrantType(SpecificGrant_Grant type) =>
+      state = state.copyWith(grantType: type);
+}

useragent/lib/screens/dashboard/evm/grants/create/provider.freezed.dart

@@ -0,0 +1,274 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// coverage:ignore-file
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'provider.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+// dart format off
+T _$identity<T>(T value) => value;
+/// @nodoc
+mixin _$GrantCreationState {
+
+ int? get selectedClientId; SpecificGrant_Grant get grantType;
+/// Create a copy of GrantCreationState
+/// with the given fields replaced by the non-null parameter values.
+@JsonKey(includeFromJson: false, includeToJson: false)
+@pragma('vm:prefer-inline')
+$GrantCreationStateCopyWith<GrantCreationState> get copyWith => _$GrantCreationStateCopyWithImpl<GrantCreationState>(this as GrantCreationState, _$identity);
+
+
+
+@override
+bool operator ==(Object other) {
+  return identical(this, other) || (other.runtimeType == runtimeType&&other is GrantCreationState&&(identical(other.selectedClientId, selectedClientId) || other.selectedClientId == selectedClientId)&&(identical(other.grantType, grantType) || other.grantType == grantType));
+}
+
+
+@override
+int get hashCode => Object.hash(runtimeType,selectedClientId,grantType);
+
+@override
+String toString() {
+  return 'GrantCreationState(selectedClientId: $selectedClientId, grantType: $grantType)';
+}
+
+
+}
+
+/// @nodoc
+abstract mixin class $GrantCreationStateCopyWith<$Res>  {
+  factory $GrantCreationStateCopyWith(GrantCreationState value, $Res Function(GrantCreationState) _then) = _$GrantCreationStateCopyWithImpl;
+@useResult
+$Res call({
+ int? selectedClientId, SpecificGrant_Grant grantType
+});
+
+
+
+
+}
+/// @nodoc
+class _$GrantCreationStateCopyWithImpl<$Res>
+    implements $GrantCreationStateCopyWith<$Res> {
+  _$GrantCreationStateCopyWithImpl(this._self, this._then);
+
+  final GrantCreationState _self;
+  final $Res Function(GrantCreationState) _then;
+
+/// Create a copy of GrantCreationState
+/// with the given fields replaced by the non-null parameter values.
+@pragma('vm:prefer-inline') @override $Res call({Object? selectedClientId = freezed,Object? grantType = null,}) {
+  return _then(_self.copyWith(
+selectedClientId: freezed == selectedClientId ? _self.selectedClientId : selectedClientId // ignore: cast_nullable_to_non_nullable
+as int?,grantType: null == grantType ? _self.grantType : grantType // ignore: cast_nullable_to_non_nullable
+as SpecificGrant_Grant,
+  ));
+}
+
+}
+
+
+/// Adds pattern-matching-related methods to [GrantCreationState].
+extension GrantCreationStatePatterns on GrantCreationState {
+/// A variant of `map` that fallback to returning `orElse`.
+///
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case final Subclass value:
+///     return ...;
+///   case _:
+///     return orElse();
+/// }
+/// ```
+
+@optionalTypeArgs TResult maybeMap<TResult extends Object?>(TResult Function( _GrantCreationState value)?  $default,{required TResult orElse(),}){
+final _that = this;
+switch (_that) {
+case _GrantCreationState() when $default != null:
+return $default(_that);case _:
+  return orElse();
+
+}
+}
+/// A `switch`-like method, using callbacks.
+///
+/// Callbacks receives the raw object, upcasted.
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case final Subclass value:
+///     return ...;
+///   case final Subclass2 value:
+///     return ...;
+/// }
+/// ```
+
+@optionalTypeArgs TResult map<TResult extends Object?>(TResult Function( _GrantCreationState value)  $default,){
+final _that = this;
+switch (_that) {
+case _GrantCreationState():
+return $default(_that);case _:
+  throw StateError('Unexpected subclass');
+
+}
+}
+/// A variant of `map` that fallback to returning `null`.
+///
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case final Subclass value:
+///     return ...;
+///   case _:
+///     return null;
+/// }
+/// ```
+
+@optionalTypeArgs TResult? mapOrNull<TResult extends Object?>(TResult? Function( _GrantCreationState value)?  $default,){
+final _that = this;
+switch (_that) {
+case _GrantCreationState() when $default != null:
+return $default(_that);case _:
+  return null;
+
+}
+}
+/// A variant of `when` that fallback to an `orElse` callback.
+///
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case Subclass(:final field):
+///     return ...;
+///   case _:
+///     return orElse();
+/// }
+/// ```
+
+@optionalTypeArgs TResult maybeWhen<TResult extends Object?>(TResult Function( int? selectedClientId,  SpecificGrant_Grant grantType)?  $default,{required TResult orElse(),}) {final _that = this;
+switch (_that) {
+case _GrantCreationState() when $default != null:
+return $default(_that.selectedClientId,_that.grantType);case _:
+  return orElse();
+
+}
+}
+/// A `switch`-like method, using callbacks.
+///
+/// As opposed to `map`, this offers destructuring.
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case Subclass(:final field):
+///     return ...;
+///   case Subclass2(:final field2):
+///     return ...;
+/// }
+/// ```
+
+@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( int? selectedClientId,  SpecificGrant_Grant grantType)  $default,) {final _that = this;
+switch (_that) {
+case _GrantCreationState():
+return $default(_that.selectedClientId,_that.grantType);case _:
+  throw StateError('Unexpected subclass');
+
+}
+}
+/// A variant of `when` that fallback to returning `null`
+///
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case Subclass(:final field):
+///     return ...;
+///   case _:
+///     return null;
+/// }
+/// ```
+
+@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( int? selectedClientId,  SpecificGrant_Grant grantType)?  $default,) {final _that = this;
+switch (_that) {
+case _GrantCreationState() when $default != null:
+return $default(_that.selectedClientId,_that.grantType);case _:
+  return null;
+
+}
+}
+
+}
+
+/// @nodoc
+
+
+class _GrantCreationState implements GrantCreationState {
+  const _GrantCreationState({this.selectedClientId, this.grantType = SpecificGrant_Grant.etherTransfer});
+  
+
+@override final  int? selectedClientId;
+@override@JsonKey() final  SpecificGrant_Grant grantType;
+
+/// Create a copy of GrantCreationState
+/// with the given fields replaced by the non-null parameter values.
+@override @JsonKey(includeFromJson: false, includeToJson: false)
+@pragma('vm:prefer-inline')
+_$GrantCreationStateCopyWith<_GrantCreationState> get copyWith => __$GrantCreationStateCopyWithImpl<_GrantCreationState>(this, _$identity);
+
+
+
+@override
+bool operator ==(Object other) {
+  return identical(this, other) || (other.runtimeType == runtimeType&&other is _GrantCreationState&&(identical(other.selectedClientId, selectedClientId) || other.selectedClientId == selectedClientId)&&(identical(other.grantType, grantType) || other.grantType == grantType));
+}
+
+
+@override
+int get hashCode => Object.hash(runtimeType,selectedClientId,grantType);
+
+@override
+String toString() {
+  return 'GrantCreationState(selectedClientId: $selectedClientId, grantType: $grantType)';
+}
+
+
+}
+
+/// @nodoc
+abstract mixin class _$GrantCreationStateCopyWith<$Res> implements $GrantCreationStateCopyWith<$Res> {
+  factory _$GrantCreationStateCopyWith(_GrantCreationState value, $Res Function(_GrantCreationState) _then) = __$GrantCreationStateCopyWithImpl;
+@override @useResult
+$Res call({
+ int? selectedClientId, SpecificGrant_Grant grantType
+});
+
+
+
+
+}
+/// @nodoc
+class __$GrantCreationStateCopyWithImpl<$Res>
+    implements _$GrantCreationStateCopyWith<$Res> {
+  __$GrantCreationStateCopyWithImpl(this._self, this._then);
+
+  final _GrantCreationState _self;
+  final $Res Function(_GrantCreationState) _then;
+
+/// Create a copy of GrantCreationState
+/// with the given fields replaced by the non-null parameter values.
+@override @pragma('vm:prefer-inline') $Res call({Object? selectedClientId = freezed,Object? grantType = null,}) {
+  return _then(_GrantCreationState(
+selectedClientId: freezed == selectedClientId ? _self.selectedClientId : selectedClientId // ignore: cast_nullable_to_non_nullable
+as int?,grantType: null == grantType ? _self.grantType : grantType // ignore: cast_nullable_to_non_nullable
+as SpecificGrant_Grant,
+  ));
+}
+
+
+}
+
+// dart format on

useragent/lib/screens/dashboard/evm/grants/create/provider.g.dart

@@ -0,0 +1,62 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'provider.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint, type=warning
+
+@ProviderFor(GrantCreation)
+final grantCreationProvider = GrantCreationProvider._();
+
+final class GrantCreationProvider
+    extends $NotifierProvider<GrantCreation, GrantCreationState> {
+  GrantCreationProvider._()
+    : super(
+        from: null,
+        argument: null,
+        retry: null,
+        name: r'grantCreationProvider',
+        isAutoDispose: true,
+        dependencies: null,
+        $allTransitiveDependencies: null,
+      );
+
+  @override
+  String debugGetCreateSourceHash() => _$grantCreationHash();
+
+  @$internal
+  @override
+  GrantCreation create() => GrantCreation();
+
+  /// {@macro riverpod.override_with_value}
+  Override overrideWithValue(GrantCreationState value) {
+    return $ProviderOverride(
+      origin: this,
+      providerOverride: $SyncValueProvider<GrantCreationState>(value),
+    );
+  }
+}
+
+String _$grantCreationHash() => r'3733d45da30990ef8ecbee946d2eae81bc7f5fc9';
+
+abstract class _$GrantCreation extends $Notifier<GrantCreationState> {
+  GrantCreationState build();
+  @$mustCallSuper
+  @override
+  void runBuild() {
+    final ref = this.ref as $Ref<GrantCreationState, GrantCreationState>;
+    final element =
+        ref.element
+            as $ClassProviderElement<
+              AnyNotifier<GrantCreationState, GrantCreationState>,
+              GrantCreationState,
+              Object?,
+              Object?
+            >;
+    element.handleCreate(ref, build);
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/screen.dart

@@ -0,0 +1,252 @@
+// lib/screens/dashboard/evm/grants/create/screen.dart
+import 'package:arbiter/proto/evm.pb.dart';
+import 'package:arbiter/providers/evm/evm_grants.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/grants/ether_transfer_grant.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/grants/grant_form_handler.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/grants/token_transfer_grant.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/provider.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/shared_grant_fields.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/utils.dart';
+import 'package:arbiter/theme/palette.dart';
+import 'package:auto_route/auto_route.dart';
+import 'package:fixnum/fixnum.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:hooks_riverpod/experimental/mutation.dart';
+import 'package:sizer/sizer.dart';
+
+const _etherHandler = EtherTransferGrantHandler();
+const _tokenHandler = TokenTransferGrantHandler();
+
+GrantFormHandler _handlerFor(SpecificGrant_Grant type) => switch (type) {
+      SpecificGrant_Grant.etherTransfer => _etherHandler,
+      SpecificGrant_Grant.tokenTransfer => _tokenHandler,
+      _ => throw ArgumentError('Unsupported grant type: $type'),
+    };
+
+@RoutePage()
+class CreateEvmGrantScreen extends HookConsumerWidget {
+  const CreateEvmGrantScreen({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final formKey = useMemoized(() => GlobalKey<FormBuilderState>());
+    final createMutation = ref.watch(createEvmGrantMutation);
+    final state = ref.watch(grantCreationProvider);
+    final notifier = ref.read(grantCreationProvider.notifier);
+    final handler = _handlerFor(state.grantType);
+
+    Future<void> submit() async {
+      if (!(formKey.currentState?.saveAndValidate() ?? false)) return;
+      final formValues = formKey.currentState!.value;
+
+      final accessId = formValues['walletAccessId'] as int?;
+      if (accessId == null) {
+        _showSnackBar(context, 'Select a client and wallet access.');
+        return;
+      }
+
+      try {
+        final specific = handler.buildSpecificGrant(formValues, ref);
+        final sharedSettings = SharedSettings(
+          walletAccessId: accessId,
+          chainId: Int64.parseInt(
+            (formValues['chainId'] as String? ?? '').trim(),
+          ),
+        );
+        final validFrom = formValues['validFrom'] as DateTime?;
+        final validUntil = formValues['validUntil'] as DateTime?;
+        if (validFrom != null) sharedSettings.validFrom = toTimestamp(validFrom);
+        if (validUntil != null) {
+          sharedSettings.validUntil = toTimestamp(validUntil);
+        }
+        final gasBytes =
+            optionalBigIntBytes(formValues['maxGasFeePerGas'] as String? ?? '');
+        if (gasBytes != null) sharedSettings.maxGasFeePerGas = gasBytes;
+        final priorityBytes = optionalBigIntBytes(
+          formValues['maxPriorityFeePerGas'] as String? ?? '',
+        );
+        if (priorityBytes != null) {
+          sharedSettings.maxPriorityFeePerGas = priorityBytes;
+        }
+        final rateLimit = buildRateLimit(
+          formValues['txCount'] as String? ?? '',
+          formValues['txWindow'] as String? ?? '',
+        );
+        if (rateLimit != null) sharedSettings.rateLimit = rateLimit;
+
+        await executeCreateEvmGrant(
+          ref,
+          sharedSettings: sharedSettings,
+          specific: specific,
+        );
+        if (!context.mounted) return;
+        context.router.pop();
+      } catch (error) {
+        if (!context.mounted) return;
+        _showSnackBar(context, _formatError(error));
+      }
+    }
+
+    return Scaffold(
+      appBar: AppBar(title: const Text('Create EVM Grant')),
+      body: SafeArea(
+        child: FormBuilder(
+          key: formKey,
+          child: ListView(
+            padding: EdgeInsets.fromLTRB(2.4.w, 2.h, 2.4.w, 3.2.h),
+            children: [
+              const _IntroCard(),
+              SizedBox(height: 1.8.h),
+              const _Section(
+                title: 'Shared grant options',
+                child: SharedGrantFields(),
+              ),
+              SizedBox(height: 1.8.h),
+              _GrantTypeSelector(
+                value: state.grantType,
+                onChanged: notifier.setGrantType,
+              ),
+              SizedBox(height: 1.8.h),
+              _Section(
+                title: 'Grant-specific options',
+                child: handler.buildForm(context, ref),
+              ),
+              SizedBox(height: 2.2.h),
+              Align(
+                alignment: Alignment.centerRight,
+                child: FilledButton.icon(
+                  onPressed:
+                      createMutation is MutationPending ? null : submit,
+                  icon: createMutation is MutationPending
+                      ? SizedBox(
+                          width: 1.8.h,
+                          height: 1.8.h,
+                          child: const CircularProgressIndicator(
+                            strokeWidth: 2.2,
+                          ),
+                        )
+                      : const Icon(Icons.check_rounded),
+                  label: Text(
+                    createMutation is MutationPending
+                        ? 'Creating...'
+                        : 'Create grant',
+                  ),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Layout helpers
+// ---------------------------------------------------------------------------
+
+class _IntroCard extends StatelessWidget {
+  const _IntroCard();
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: EdgeInsets.all(2.h),
+      decoration: BoxDecoration(
+        borderRadius: BorderRadius.circular(24),
+        gradient: const LinearGradient(
+          colors: [Palette.introGradientStart, Palette.introGradientEnd],
+          begin: Alignment.topLeft,
+          end: Alignment.bottomRight,
+        ),
+        border: Border.all(color: Palette.cardBorder),
+      ),
+      child: Text(
+        'Pick a client, then select one of the wallet accesses already granted '
+        'to it. Compose shared constraints once, then switch between Ether and '
+        'token transfer rules.',
+        style: Theme.of(context).textTheme.bodyLarge?.copyWith(height: 1.5),
+      ),
+    );
+  }
+}
+
+class _Section extends StatelessWidget {
+  const _Section({required this.title, required this.child});
+
+  final String title;
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: EdgeInsets.all(2.h),
+      decoration: BoxDecoration(
+        borderRadius: BorderRadius.circular(24),
+        color: Colors.white,
+        border: Border.all(color: Palette.cardBorder),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Text(
+            title,
+            style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                  fontWeight: FontWeight.w800,
+                ),
+          ),
+          SizedBox(height: 1.4.h),
+          child,
+        ],
+      ),
+    );
+  }
+}
+
+class _GrantTypeSelector extends StatelessWidget {
+  const _GrantTypeSelector({required this.value, required this.onChanged});
+
+  final SpecificGrant_Grant value;
+  final ValueChanged<SpecificGrant_Grant> onChanged;
+
+  @override
+  Widget build(BuildContext context) {
+    return SegmentedButton<SpecificGrant_Grant>(
+      segments: const [
+        ButtonSegment(
+          value: SpecificGrant_Grant.etherTransfer,
+          label: Text('Ether'),
+          icon: Icon(Icons.bolt_rounded),
+        ),
+        ButtonSegment(
+          value: SpecificGrant_Grant.tokenTransfer,
+          label: Text('Token'),
+          icon: Icon(Icons.token_rounded),
+        ),
+      ],
+      selected: {value},
+      onSelectionChanged: (selection) => onChanged(selection.first),
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Utilities
+// ---------------------------------------------------------------------------
+
+void _showSnackBar(BuildContext context, String message) {
+  if (!context.mounted) return;
+  ScaffoldMessenger.of(context).showSnackBar(
+    SnackBar(content: Text(message), behavior: SnackBarBehavior.floating),
+  );
+}
+
+String _formatError(Object error) {
+  final text = error.toString();
+  return text.startsWith('Exception: ')
+      ? text.substring('Exception: '.length)
+      : text;
+}

useragent/lib/screens/dashboard/evm/grants/create/shared_grant_fields.dart

@@ -0,0 +1,37 @@
+// lib/screens/dashboard/evm/grants/create/shared_grant_fields.dart
+import 'package:arbiter/screens/dashboard/evm/grants/create/fields/chain_id_field.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/fields/client_picker_field.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/fields/gas_fee_options_field.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/fields/transaction_rate_limit_field.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/fields/validity_window_field.dart';
+import 'package:arbiter/screens/dashboard/evm/grants/create/fields/wallet_access_picker_field.dart';
+import 'package:flutter/material.dart';
+import 'package:sizer/sizer.dart';
+
+/// All shared grant fields in a single vertical layout.
+///
+/// Every [FormBuilderField] descendant auto-registers with the nearest
+/// [FormBuilder] ancestor via [BuildContext] — no controllers passed.
+class SharedGrantFields extends StatelessWidget {
+  const SharedGrantFields({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: [
+        const ClientPickerField(),
+        SizedBox(height: 1.6.h),
+        const WalletAccessPickerField(),
+        SizedBox(height: 1.6.h),
+        const ChainIdField(),
+        SizedBox(height: 1.6.h),
+        const ValidityWindowField(),
+        SizedBox(height: 1.6.h),
+        const GasFeeOptionsField(),
+        SizedBox(height: 1.6.h),
+        const TransactionRateLimitField(),
+      ],
+    );
+  }
+}

useragent/lib/screens/dashboard/evm/grants/create/utils.dart

@@ -0,0 +1,73 @@
+import 'package:arbiter/proto/evm.pb.dart';
+import 'package:fixnum/fixnum.dart';
+import 'package:protobuf/well_known_types/google/protobuf/timestamp.pb.dart';
+
+Timestamp toTimestamp(DateTime value) {
+  final utc = value.toUtc();
+  return Timestamp()
+    ..seconds = Int64(utc.millisecondsSinceEpoch ~/ 1000)
+    ..nanos = (utc.microsecondsSinceEpoch % 1000000) * 1000;
+}
+
+TransactionRateLimit? buildRateLimit(String countText, String windowText) {
+  if (countText.trim().isEmpty || windowText.trim().isEmpty) {
+    return null;
+  }
+  return TransactionRateLimit(
+    count: int.parse(countText.trim()),
+    windowSecs: Int64.parseInt(windowText.trim()),
+  );
+}
+
+VolumeRateLimit? buildVolumeLimit(String amountText, String windowText) {
+  if (amountText.trim().isEmpty || windowText.trim().isEmpty) {
+    return null;
+  }
+  return VolumeRateLimit(
+    maxVolume: parseBigIntBytes(amountText),
+    windowSecs: Int64.parseInt(windowText.trim()),
+  );
+}
+
+List<int>? optionalBigIntBytes(String value) {
+  if (value.trim().isEmpty) {
+    return null;
+  }
+  return parseBigIntBytes(value);
+}
+
+List<int> parseBigIntBytes(String value) {
+  final number = BigInt.parse(value.trim());
+  if (number < BigInt.zero) {
+    throw Exception('Numeric values must be positive.');
+  }
+  if (number == BigInt.zero) {
+    return [0];
+  }
+
+  var remaining = number;
+  final bytes = <int>[];
+  while (remaining > BigInt.zero) {
+    bytes.insert(0, (remaining & BigInt.from(0xff)).toInt());
+    remaining >>= 8;
+  }
+  return bytes;
+}
+
+List<int> parseHexAddress(String value) {
+  final normalized = value.trim().replaceFirst(RegExp(r'^0x'), '');
+  if (normalized.length != 40) {
+    throw Exception('Expected a 20-byte hex address.');
+  }
+  return [
+    for (var i = 0; i < normalized.length; i += 2)
+      int.parse(normalized.substring(i, i + 2), radix: 16),
+  ];
+}
+
+String shortAddress(List<int> bytes) {
+  final hex = bytes
+      .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
+      .join();
+  return '0x${hex.substring(0, 6)}...${hex.substring(hex.length - 4)}';
+}

useragent/lib/screens/dashboard/evm/grants/grant_create.dart

@@ -1,902 +0,0 @@
-import 'package:arbiter/proto/evm.pb.dart';
-import 'package:arbiter/proto/user_agent.pb.dart';
-import 'package:arbiter/providers/evm/evm.dart';
-import 'package:arbiter/providers/evm/evm_grants.dart';
-import 'package:arbiter/providers/sdk_clients/list.dart';
-import 'package:arbiter/providers/sdk_clients/wallet_access_list.dart';
-import 'package:auto_route/auto_route.dart';
-import 'package:fixnum/fixnum.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_hooks/flutter_hooks.dart';
-import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:hooks_riverpod/experimental/mutation.dart';
-import 'package:protobuf/well_known_types/google/protobuf/timestamp.pb.dart';
-import 'package:sizer/sizer.dart';
-
-@RoutePage()
-class CreateEvmGrantScreen extends HookConsumerWidget {
-  const CreateEvmGrantScreen({super.key});
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    final createMutation = ref.watch(createEvmGrantMutation);
-
-    final selectedClientId = useState<int?>(null);
-    final selectedWalletAccessId = useState<int?>(null);
-    final chainIdController = useTextEditingController(text: '1');
-    final gasFeeController = useTextEditingController();
-    final priorityFeeController = useTextEditingController();
-    final txCountController = useTextEditingController();
-    final txWindowController = useTextEditingController();
-    final recipientsController = useTextEditingController();
-    final etherVolumeController = useTextEditingController();
-    final etherVolumeWindowController = useTextEditingController();
-    final tokenContractController = useTextEditingController();
-    final tokenTargetController = useTextEditingController();
-    final validFrom = useState<DateTime?>(null);
-    final validUntil = useState<DateTime?>(null);
-    final grantType = useState<SpecificGrant_Grant>(
-      SpecificGrant_Grant.etherTransfer,
-    );
-    final tokenVolumeLimits = useState<List<_VolumeLimitValue>>([
-      const _VolumeLimitValue(),
-    ]);
-
-    Future<void> submit() async {
-      final accessId = selectedWalletAccessId.value;
-      if (accessId == null) {
-        _showCreateMessage(context, 'Select a client and wallet access.');
-        return;
-      }
-
-      try {
-        final chainId = Int64.parseInt(chainIdController.text.trim());
-        final rateLimit = _buildRateLimit(
-          txCountController.text,
-          txWindowController.text,
-        );
-        final specific = switch (grantType.value) {
-          SpecificGrant_Grant.etherTransfer => SpecificGrant(
-            etherTransfer: EtherTransferSettings(
-              targets: _parseAddresses(recipientsController.text),
-              limit: _buildVolumeLimit(
-                etherVolumeController.text,
-                etherVolumeWindowController.text,
-              ),
-            ),
-          ),
-          SpecificGrant_Grant.tokenTransfer => SpecificGrant(
-            tokenTransfer: TokenTransferSettings(
-              tokenContract: _parseHexAddress(tokenContractController.text),
-              target: tokenTargetController.text.trim().isEmpty
-                  ? null
-                  : _parseHexAddress(tokenTargetController.text),
-              volumeLimits: tokenVolumeLimits.value
-                  .where((item) => item.amount.trim().isNotEmpty)
-                  .map(
-                    (item) => VolumeRateLimit(
-                      maxVolume: _parseBigIntBytes(item.amount),
-                      windowSecs: Int64.parseInt(item.windowSeconds),
-                    ),
-                  )
-                  .toList(),
-            ),
-          ),
-          _ => throw Exception('Unsupported grant type.'),
-        };
-
-        final sharedSettings = SharedSettings(
-          walletAccessId: accessId,
-          chainId: chainId,
-        );
-        if (validFrom.value != null) {
-          sharedSettings.validFrom = _toTimestamp(validFrom.value!);
-        }
-        if (validUntil.value != null) {
-          sharedSettings.validUntil = _toTimestamp(validUntil.value!);
-        }
-        final gasBytes = _optionalBigIntBytes(gasFeeController.text);
-        if (gasBytes != null) sharedSettings.maxGasFeePerGas = gasBytes;
-        final priorityBytes = _optionalBigIntBytes(priorityFeeController.text);
-        if (priorityBytes != null) sharedSettings.maxPriorityFeePerGas = priorityBytes;
-        if (rateLimit != null) sharedSettings.rateLimit = rateLimit;
-
-        await executeCreateEvmGrant(
-          ref,
-          sharedSettings: sharedSettings,
-          specific: specific,
-        );
-        if (!context.mounted) {
-          return;
-        }
-        context.router.pop();
-      } catch (error) {
-        if (!context.mounted) {
-          return;
-        }
-        _showCreateMessage(context, _formatCreateError(error));
-      }
-    }
-
-    return Scaffold(
-      appBar: AppBar(title: const Text('Create EVM Grant')),
-      body: SafeArea(
-        child: ListView(
-          padding: EdgeInsets.fromLTRB(2.4.w, 2.h, 2.4.w, 3.2.h),
-          children: [
-            const _CreateIntroCard(),
-            SizedBox(height: 1.8.h),
-            _CreateSection(
-              title: 'Shared grant options',
-              children: [
-                _ClientPickerField(
-                  selectedClientId: selectedClientId.value,
-                  onChanged: (clientId) {
-                    selectedClientId.value = clientId;
-                    selectedWalletAccessId.value = null;
-                  },
-                ),
-                _WalletAccessPickerField(
-                  selectedClientId: selectedClientId.value,
-                  selectedAccessId: selectedWalletAccessId.value,
-                  onChanged: (accessId) =>
-                      selectedWalletAccessId.value = accessId,
-                ),
-                _NumberInputField(
-                  controller: chainIdController,
-                  label: 'Chain ID',
-                  hint: '1',
-                ),
-                _ValidityWindowField(
-                  validFrom: validFrom.value,
-                  validUntil: validUntil.value,
-                  onValidFromChanged: (value) => validFrom.value = value,
-                  onValidUntilChanged: (value) => validUntil.value = value,
-                ),
-                _GasFeeOptionsField(
-                  gasFeeController: gasFeeController,
-                  priorityFeeController: priorityFeeController,
-                ),
-                _TransactionRateLimitField(
-                  txCountController: txCountController,
-                  txWindowController: txWindowController,
-                ),
-              ],
-            ),
-            SizedBox(height: 1.8.h),
-            _GrantTypeSelector(
-              value: grantType.value,
-              onChanged: (value) => grantType.value = value,
-            ),
-            SizedBox(height: 1.8.h),
-            _CreateSection(
-              title: 'Grant-specific options',
-              children: [
-                if (grantType.value == SpecificGrant_Grant.etherTransfer) ...[
-                  _EtherTargetsField(controller: recipientsController),
-                  _VolumeLimitField(
-                    amountController: etherVolumeController,
-                    windowController: etherVolumeWindowController,
-                    title: 'Ether volume limit',
-                  ),
-                ] else ...[
-                  _TokenContractField(controller: tokenContractController),
-                  _TokenRecipientField(controller: tokenTargetController),
-                  _TokenVolumeLimitsField(
-                    values: tokenVolumeLimits.value,
-                    onChanged: (values) => tokenVolumeLimits.value = values,
-                  ),
-                ],
-              ],
-            ),
-            SizedBox(height: 2.2.h),
-            Align(
-              alignment: Alignment.centerRight,
-              child: FilledButton.icon(
-                onPressed: createMutation is MutationPending ? null : submit,
-                icon: createMutation is MutationPending
-                    ? SizedBox(
-                        width: 1.8.h,
-                        height: 1.8.h,
-                        child: const CircularProgressIndicator(strokeWidth: 2.2),
-                      )
-                    : const Icon(Icons.check_rounded),
-                label: Text(
-                  createMutation is MutationPending
-                      ? 'Creating...'
-                      : 'Create grant',
-                ),
-              ),
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-}
-
-class _CreateIntroCard extends StatelessWidget {
-  const _CreateIntroCard();
-
-  @override
-  Widget build(BuildContext context) {
-    return Container(
-      padding: EdgeInsets.all(2.h),
-      decoration: BoxDecoration(
-        borderRadius: BorderRadius.circular(24),
-        gradient: const LinearGradient(
-          colors: [Color(0xFFF7F9FC), Color(0xFFFDF5EA)],
-          begin: Alignment.topLeft,
-          end: Alignment.bottomRight,
-        ),
-        border: Border.all(color: const Color(0x1A17324A)),
-      ),
-      child: Text(
-        'Pick a client, then select one of the wallet accesses already granted to it. Compose shared constraints once, then switch between Ether and token transfer rules.',
-        style: Theme.of(context).textTheme.bodyLarge?.copyWith(height: 1.5),
-      ),
-    );
-  }
-}
-
-class _CreateSection extends StatelessWidget {
-  const _CreateSection({required this.title, required this.children});
-
-  final String title;
-  final List<Widget> children;
-
-  @override
-  Widget build(BuildContext context) {
-    return Container(
-      padding: EdgeInsets.all(2.h),
-      decoration: BoxDecoration(
-        borderRadius: BorderRadius.circular(24),
-        color: Colors.white,
-        border: Border.all(color: const Color(0x1A17324A)),
-      ),
-      child: Column(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: [
-          Text(
-            title,
-            style: Theme.of(context).textTheme.titleMedium?.copyWith(
-              fontWeight: FontWeight.w800,
-            ),
-          ),
-          SizedBox(height: 1.4.h),
-          ...children.map(
-            (child) => Padding(
-              padding: EdgeInsets.only(bottom: 1.6.h),
-              child: child,
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-}
-
-class _ClientPickerField extends ConsumerWidget {
-  const _ClientPickerField({
-    required this.selectedClientId,
-    required this.onChanged,
-  });
-
-  final int? selectedClientId;
-  final ValueChanged<int?> onChanged;
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    final clients =
-        ref.watch(sdkClientsProvider).asData?.value ?? const <SdkClientEntry>[];
-
-    return DropdownButtonFormField<int>(
-      value: clients.any((c) => c.id == selectedClientId)
-          ? selectedClientId
-          : null,
-      decoration: const InputDecoration(
-        labelText: 'Client',
-        border: OutlineInputBorder(),
-      ),
-      items: [
-        for (final c in clients)
-          DropdownMenuItem(
-            value: c.id,
-            child: Text(
-              c.info.name.isEmpty ? 'Client #${c.id}' : c.info.name,
-            ),
-          ),
-      ],
-      onChanged: clients.isEmpty ? null : onChanged,
-    );
-  }
-}
-
-class _WalletAccessPickerField extends ConsumerWidget {
-  const _WalletAccessPickerField({
-    required this.selectedClientId,
-    required this.selectedAccessId,
-    required this.onChanged,
-  });
-
-  final int? selectedClientId;
-  final int? selectedAccessId;
-  final ValueChanged<int?> onChanged;
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    final allAccesses =
-        ref.watch(walletAccessListProvider).asData?.value ??
-        const <SdkClientWalletAccess>[];
-    final wallets =
-        ref.watch(evmProvider).asData?.value ?? const <WalletEntry>[];
-
-    final walletById = <int, WalletEntry>{
-      for (final w in wallets) w.id: w,
-    };
-
-    final accesses = selectedClientId == null
-        ? const <SdkClientWalletAccess>[]
-        : allAccesses
-              .where((a) => a.access.sdkClientId == selectedClientId)
-              .toList();
-
-    final effectiveValue =
-        accesses.any((a) => a.id == selectedAccessId) ? selectedAccessId : null;
-
-    return DropdownButtonFormField<int>(
-      value: effectiveValue,
-      decoration: InputDecoration(
-        labelText: 'Wallet access',
-        helperText: selectedClientId == null
-            ? 'Select a client first'
-            : accesses.isEmpty
-            ? 'No wallet accesses for this client'
-            : null,
-        border: const OutlineInputBorder(),
-      ),
-      items: [
-        for (final a in accesses)
-          DropdownMenuItem(
-            value: a.id,
-            child: Text(() {
-              final wallet = walletById[a.access.walletId];
-              return wallet != null
-                  ? _shortAddress(wallet.address)
-                  : 'Wallet #${a.access.walletId}';
-            }()),
-          ),
-      ],
-      onChanged: accesses.isEmpty ? null : onChanged,
-    );
-  }
-}
-
-class _NumberInputField extends StatelessWidget {
-  const _NumberInputField({
-    required this.controller,
-    required this.label,
-    required this.hint,
-    this.helper,
-  });
-
-  final TextEditingController controller;
-  final String label;
-  final String hint;
-  final String? helper;
-
-  @override
-  Widget build(BuildContext context) {
-    return TextField(
-      controller: controller,
-      keyboardType: TextInputType.number,
-      decoration: InputDecoration(
-        labelText: label,
-        hintText: hint,
-        helperText: helper,
-        border: const OutlineInputBorder(),
-      ),
-    );
-  }
-}
-
-class _ValidityWindowField extends StatelessWidget {
-  const _ValidityWindowField({
-    required this.validFrom,
-    required this.validUntil,
-    required this.onValidFromChanged,
-    required this.onValidUntilChanged,
-  });
-
-  final DateTime? validFrom;
-  final DateTime? validUntil;
-  final ValueChanged<DateTime?> onValidFromChanged;
-  final ValueChanged<DateTime?> onValidUntilChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    return Row(
-      children: [
-        Expanded(
-          child: _DateButtonField(
-            label: 'Valid from',
-            value: validFrom,
-            onChanged: onValidFromChanged,
-          ),
-        ),
-        SizedBox(width: 1.w),
-        Expanded(
-          child: _DateButtonField(
-            label: 'Valid until',
-            value: validUntil,
-            onChanged: onValidUntilChanged,
-          ),
-        ),
-      ],
-    );
-  }
-}
-
-class _DateButtonField extends StatelessWidget {
-  const _DateButtonField({
-    required this.label,
-    required this.value,
-    required this.onChanged,
-  });
-
-  final String label;
-  final DateTime? value;
-  final ValueChanged<DateTime?> onChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    return OutlinedButton(
-      onPressed: () async {
-        final now = DateTime.now();
-        final date = await showDatePicker(
-          context: context,
-          firstDate: DateTime(now.year - 5),
-          lastDate: DateTime(now.year + 10),
-          initialDate: value ?? now,
-        );
-        if (date == null || !context.mounted) {
-          return;
-        }
-        final time = await showTimePicker(
-          context: context,
-          initialTime: TimeOfDay.fromDateTime(value ?? now),
-        );
-        if (time == null) {
-          return;
-        }
-        onChanged(
-          DateTime(date.year, date.month, date.day, time.hour, time.minute),
-        );
-      },
-      onLongPress: value == null ? null : () => onChanged(null),
-      child: Padding(
-        padding: EdgeInsets.symmetric(vertical: 1.8.h),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text(label),
-            SizedBox(height: 0.6.h),
-            Text(value?.toLocal().toString() ?? 'Not set'),
-          ],
-        ),
-      ),
-    );
-  }
-}
-
-class _GasFeeOptionsField extends StatelessWidget {
-  const _GasFeeOptionsField({
-    required this.gasFeeController,
-    required this.priorityFeeController,
-  });
-
-  final TextEditingController gasFeeController;
-  final TextEditingController priorityFeeController;
-
-  @override
-  Widget build(BuildContext context) {
-    return Row(
-      children: [
-        Expanded(
-          child: _NumberInputField(
-            controller: gasFeeController,
-            label: 'Max gas fee / gas',
-            hint: '1000000000',
-          ),
-        ),
-        SizedBox(width: 1.w),
-        Expanded(
-          child: _NumberInputField(
-            controller: priorityFeeController,
-            label: 'Max priority fee / gas',
-            hint: '100000000',
-          ),
-        ),
-      ],
-    );
-  }
-}
-
-class _TransactionRateLimitField extends StatelessWidget {
-  const _TransactionRateLimitField({
-    required this.txCountController,
-    required this.txWindowController,
-  });
-
-  final TextEditingController txCountController;
-  final TextEditingController txWindowController;
-
-  @override
-  Widget build(BuildContext context) {
-    return Row(
-      children: [
-        Expanded(
-          child: _NumberInputField(
-            controller: txCountController,
-            label: 'Tx count limit',
-            hint: '10',
-          ),
-        ),
-        SizedBox(width: 1.w),
-        Expanded(
-          child: _NumberInputField(
-            controller: txWindowController,
-            label: 'Window (seconds)',
-            hint: '3600',
-          ),
-        ),
-      ],
-    );
-  }
-}
-
-class _GrantTypeSelector extends StatelessWidget {
-  const _GrantTypeSelector({required this.value, required this.onChanged});
-
-  final SpecificGrant_Grant value;
-  final ValueChanged<SpecificGrant_Grant> onChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    return SegmentedButton<SpecificGrant_Grant>(
-      segments: const [
-        ButtonSegment(
-          value: SpecificGrant_Grant.etherTransfer,
-          label: Text('Ether'),
-          icon: Icon(Icons.bolt_rounded),
-        ),
-        ButtonSegment(
-          value: SpecificGrant_Grant.tokenTransfer,
-          label: Text('Token'),
-          icon: Icon(Icons.token_rounded),
-        ),
-      ],
-      selected: {value},
-      onSelectionChanged: (selection) => onChanged(selection.first),
-    );
-  }
-}
-
-class _EtherTargetsField extends StatelessWidget {
-  const _EtherTargetsField({required this.controller});
-
-  final TextEditingController controller;
-
-  @override
-  Widget build(BuildContext context) {
-    return TextField(
-      controller: controller,
-      minLines: 3,
-      maxLines: 6,
-      decoration: const InputDecoration(
-        labelText: 'Ether recipients',
-        hintText: 'One 0x address per line. Leave empty for unrestricted targets.',
-        border: OutlineInputBorder(),
-      ),
-    );
-  }
-}
-
-class _VolumeLimitField extends StatelessWidget {
-  const _VolumeLimitField({
-    required this.amountController,
-    required this.windowController,
-    required this.title,
-  });
-
-  final TextEditingController amountController;
-  final TextEditingController windowController;
-  final String title;
-
-  @override
-  Widget build(BuildContext context) {
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        Text(
-          title,
-          style: Theme.of(context).textTheme.labelLarge?.copyWith(
-            fontWeight: FontWeight.w800,
-          ),
-        ),
-        SizedBox(height: 0.8.h),
-        Row(
-          children: [
-            Expanded(
-              child: _NumberInputField(
-                controller: amountController,
-                label: 'Max volume',
-                hint: '1000000000000000000',
-              ),
-            ),
-            SizedBox(width: 1.w),
-            Expanded(
-              child: _NumberInputField(
-                controller: windowController,
-                label: 'Window (seconds)',
-                hint: '86400',
-              ),
-            ),
-          ],
-        ),
-      ],
-    );
-  }
-}
-
-class _TokenContractField extends StatelessWidget {
-  const _TokenContractField({required this.controller});
-
-  final TextEditingController controller;
-
-  @override
-  Widget build(BuildContext context) {
-    return TextField(
-      controller: controller,
-      decoration: const InputDecoration(
-        labelText: 'Token contract',
-        hintText: '0x...',
-        border: OutlineInputBorder(),
-      ),
-    );
-  }
-}
-
-class _TokenRecipientField extends StatelessWidget {
-  const _TokenRecipientField({required this.controller});
-
-  final TextEditingController controller;
-
-  @override
-  Widget build(BuildContext context) {
-    return TextField(
-      controller: controller,
-      decoration: const InputDecoration(
-        labelText: 'Token recipient',
-        hintText: '0x... or leave empty for any recipient',
-        border: OutlineInputBorder(),
-      ),
-    );
-  }
-}
-
-class _TokenVolumeLimitsField extends StatelessWidget {
-  const _TokenVolumeLimitsField({
-    required this.values,
-    required this.onChanged,
-  });
-
-  final List<_VolumeLimitValue> values;
-  final ValueChanged<List<_VolumeLimitValue>> onChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        Row(
-          children: [
-            Expanded(
-              child: Text(
-                'Token volume limits',
-                style: Theme.of(context).textTheme.labelLarge?.copyWith(
-                  fontWeight: FontWeight.w800,
-                ),
-              ),
-            ),
-            TextButton.icon(
-              onPressed: () =>
-                  onChanged([...values, const _VolumeLimitValue()]),
-              icon: const Icon(Icons.add_rounded),
-              label: const Text('Add'),
-            ),
-          ],
-        ),
-        SizedBox(height: 0.8.h),
-        for (var i = 0; i < values.length; i++)
-          Padding(
-            padding: EdgeInsets.only(bottom: 1.h),
-            child: _TokenVolumeLimitRow(
-              value: values[i],
-              onChanged: (next) {
-                final updated = [...values];
-                updated[i] = next;
-                onChanged(updated);
-              },
-              onRemove: values.length == 1
-                  ? null
-                  : () {
-                      final updated = [...values]..removeAt(i);
-                      onChanged(updated);
-                    },
-            ),
-          ),
-      ],
-    );
-  }
-}
-
-class _TokenVolumeLimitRow extends StatelessWidget {
-  const _TokenVolumeLimitRow({
-    required this.value,
-    required this.onChanged,
-    required this.onRemove,
-  });
-
-  final _VolumeLimitValue value;
-  final ValueChanged<_VolumeLimitValue> onChanged;
-  final VoidCallback? onRemove;
-
-  @override
-  Widget build(BuildContext context) {
-    final amountController = TextEditingController(text: value.amount);
-    final windowController = TextEditingController(text: value.windowSeconds);
-
-    return Row(
-      children: [
-        Expanded(
-          child: TextField(
-            controller: amountController,
-            onChanged: (next) =>
-                onChanged(value.copyWith(amount: next)),
-            decoration: const InputDecoration(
-              labelText: 'Max volume',
-              border: OutlineInputBorder(),
-            ),
-          ),
-        ),
-        SizedBox(width: 1.w),
-        Expanded(
-          child: TextField(
-            controller: windowController,
-            onChanged: (next) =>
-                onChanged(value.copyWith(windowSeconds: next)),
-            decoration: const InputDecoration(
-              labelText: 'Window (seconds)',
-              border: OutlineInputBorder(),
-            ),
-          ),
-        ),
-        SizedBox(width: 0.4.w),
-        IconButton(
-          onPressed: onRemove,
-          icon: const Icon(Icons.remove_circle_outline_rounded),
-        ),
-      ],
-    );
-  }
-}
-
-class _VolumeLimitValue {
-  const _VolumeLimitValue({this.amount = '', this.windowSeconds = ''});
-
-  final String amount;
-  final String windowSeconds;
-
-  _VolumeLimitValue copyWith({String? amount, String? windowSeconds}) {
-    return _VolumeLimitValue(
-      amount: amount ?? this.amount,
-      windowSeconds: windowSeconds ?? this.windowSeconds,
-    );
-  }
-}
-
-Timestamp _toTimestamp(DateTime value) {
-  final utc = value.toUtc();
-  return Timestamp()
-    ..seconds = Int64(utc.millisecondsSinceEpoch ~/ 1000)
-    ..nanos = (utc.microsecondsSinceEpoch % 1000000) * 1000;
-}
-
-TransactionRateLimit? _buildRateLimit(String countText, String windowText) {
-  if (countText.trim().isEmpty || windowText.trim().isEmpty) {
-    return null;
-  }
-  return TransactionRateLimit(
-    count: int.parse(countText.trim()),
-    windowSecs: Int64.parseInt(windowText.trim()),
-  );
-}
-
-VolumeRateLimit? _buildVolumeLimit(String amountText, String windowText) {
-  if (amountText.trim().isEmpty || windowText.trim().isEmpty) {
-    return null;
-  }
-  return VolumeRateLimit(
-    maxVolume: _parseBigIntBytes(amountText),
-    windowSecs: Int64.parseInt(windowText.trim()),
-  );
-}
-
-List<int>? _optionalBigIntBytes(String value) {
-  if (value.trim().isEmpty) {
-    return null;
-  }
-  return _parseBigIntBytes(value);
-}
-
-List<int> _parseBigIntBytes(String value) {
-  final number = BigInt.parse(value.trim());
-  if (number < BigInt.zero) {
-    throw Exception('Numeric values must be positive.');
-  }
-  if (number == BigInt.zero) {
-    return [0];
-  }
-
-  var remaining = number;
-  final bytes = <int>[];
-  while (remaining > BigInt.zero) {
-    bytes.insert(0, (remaining & BigInt.from(0xff)).toInt());
-    remaining >>= 8;
-  }
-  return bytes;
-}
-
-List<List<int>> _parseAddresses(String input) {
-  final parts = input
-      .split(RegExp(r'[\n,]'))
-      .map((part) => part.trim())
-      .where((part) => part.isNotEmpty);
-  return parts.map(_parseHexAddress).toList();
-}
-
-List<int> _parseHexAddress(String value) {
-  final normalized = value.trim().replaceFirst(RegExp(r'^0x'), '');
-  if (normalized.length != 40) {
-    throw Exception('Expected a 20-byte hex address.');
-  }
-  return [
-    for (var i = 0; i < normalized.length; i += 2)
-      int.parse(normalized.substring(i, i + 2), radix: 16),
-  ];
-}
-
-String _shortAddress(List<int> bytes) {
-  final hex = bytes
-      .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
-      .join();
-  return '0x${hex.substring(0, 6)}...${hex.substring(hex.length - 4)}';
-}
-
-void _showCreateMessage(BuildContext context, String message) {
-  if (!context.mounted) {
-    return;
-  }
-  ScaffoldMessenger.of(context).showSnackBar(
-    SnackBar(content: Text(message), behavior: SnackBarBehavior.floating),
-  );
-}
-
-String _formatCreateError(Object error) {
-  final text = error.toString();
-  if (text.startsWith('Exception: ')) {
-    return text.substring('Exception: '.length);
-  }
-  return text;
-}

useragent/lib/theme/palette.dart

@@ -6,4 +6,7 @@ class Palette {
   static const cream = Color(0xFFFFFAF4);
   static const line = Color(0x1A15263C);
   static const token = Color(0xFF5C6BC0);
+  static const cardBorder = Color(0x1A17324A);
+  static const introGradientStart = Color(0xFFF7F9FC);
+  static const introGradientEnd = Color(0xFFFDF5EA);
 }

useragent/pubspec.lock

@@ -45,10 +45,10 @@ packages:
     dependency: transitive
     description:
       name: async
-      sha256: "758e6d74e971c3e5aceb4110bfd6698efc7f501675bcfe0c775459a8140750eb"
+      sha256: e2eb0491ba5ddb6177742d2da23904574082139b07c1e33b8503b9f46f3e1a37
       url: "https://pub.dev"
     source: hosted
-    version: "2.13.0"
+    version: "2.13.1"
   auto_route:
     dependency: "direct main"
     description:
@@ -69,10 +69,10 @@ packages:
     dependency: "direct main"
     description:
       name: biometric_signature
-      sha256: "0d22580388e5cc037f6f829b29ecda74e343fd61d26c55e33cbcf48a48e5c1dc"
+      sha256: "86a37a8b514eb3b56980ab6cc9df48ffc3c551147bdf8e3bf2afb2265a7f89e8"
       url: "https://pub.dev"
     source: hosted
-    version: "10.2.0"
+    version: "11.0.1"
   bloc:
     dependency: transitive
     description:
@@ -93,10 +93,10 @@ packages:
     dependency: transitive
     description:
       name: build
-      sha256: "275bf6bb2a00a9852c28d4e0b410da1d833a734d57d39d44f94bfc895a484ec3"
+      sha256: aadd943f4f8cc946882c954c187e6115a84c98c81ad1d9c6cbf0895a8c85da9c
       url: "https://pub.dev"
     source: hosted
-    version: "4.0.4"
+    version: "4.0.5"
   build_config:
     dependency: transitive
     description:
@@ -117,10 +117,10 @@ packages:
     dependency: "direct dev"
     description:
       name: build_runner
-      sha256: "7981eb922842c77033026eb4341d5af651562008cdb116bdfa31fc46516b6462"
+      sha256: "521daf8d189deb79ba474e43a696b41c49fb3987818dbacf3308f1e03673a75e"
       url: "https://pub.dev"
     source: hosted
-    version: "2.12.2"
+    version: "2.13.1"
   built_collection:
     dependency: transitive
     description:
@@ -133,10 +133,10 @@ packages:
     dependency: transitive
     description:
       name: built_value
-      sha256: "6ae8a6435a8c6520c7077b107e77f1fb4ba7009633259a4d49a8afd8e7efc5e9"
+      sha256: "0730c18c770d05636a8f945c32a4d7d81cb6e0f0148c8db4ad12e7748f7e49af"
       url: "https://pub.dev"
     source: hosted
-    version: "8.12.4"
+    version: "8.12.5"
   characters:
     dependency: transitive
     description:
@@ -245,10 +245,10 @@ packages:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      sha256: ba631d1c7f7bef6b729a622b7b752645a2d076dba9976925b8f25725a30e1ee6
+      sha256: "41e005c33bd814be4d3096aff55b1908d419fde52ca656c8c47719ec745873cd"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.8"
+    version: "1.0.9"
   dart_style:
     dependency: transitive
     description:
@@ -311,6 +311,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "9.1.1"
+  flutter_form_builder:
+    dependency: "direct main"
+    description:
+      name: flutter_form_builder
+      sha256: "1233251b4bc1d5deb245745d2a89dcebf4cdd382e1ec3f21f1c6703b700e574f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.3.0+2"
   flutter_hooks:
     dependency: "direct main"
     description:
@@ -653,10 +661,10 @@ packages:
     dependency: transitive
     description:
       name: mockito
-      sha256: a45d1aa065b796922db7b9e7e7e45f921aed17adf3a8318a1f47097e7e695566
+      sha256: eff30d002f0c8bf073b6f929df4483b543133fcafce056870163587b03f1d422
       url: "https://pub.dev"
     source: hosted
-    version: "5.6.3"
+    version: "5.6.4"
   mtcore:
     dependency: "direct main"
     description:
@@ -669,10 +677,10 @@ packages:
     dependency: transitive
     description:
       name: native_toolchain_c
-      sha256: "92b2ca62c8bd2b8d2f267cdfccf9bfbdb7322f778f8f91b3ce5b5cda23a3899f"
+      sha256: "6ba77bb18063eebe9de401f5e6437e95e1438af0a87a3a39084fbd37c90df572"
       url: "https://pub.dev"
     source: hosted
-    version: "0.17.5"
+    version: "0.17.6"
   nested:
     dependency: transitive
     description:
@@ -725,10 +733,10 @@ packages:
     dependency: transitive
     description:
       name: path_provider_android
-      sha256: f2c65e21139ce2c3dad46922be8272bb5963516045659e71bb16e151c93b580e
+      sha256: "149441ca6e4f38193b2e004c0ca6376a3d11f51fa5a77552d8bd4d2b0c0912ba"
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.22"
+    version: "2.2.23"
   path_provider_foundation:
     dependency: transitive
     description:
@@ -938,10 +946,10 @@ packages:
     dependency: transitive
     description:
       name: source_gen
-      sha256: adc962c96fffb2de1728ef396a995aaedcafbe635abdca13d2a987ce17e57751
+      sha256: "732792cfd197d2161a65bb029606a46e0a18ff30ef9e141a7a82172b05ea8ecd"
       url: "https://pub.dev"
     source: hosted
-    version: "4.2.1"
+    version: "4.2.2"
   source_helper:
     dependency: transitive
     description:
@@ -1018,26 +1026,26 @@ packages:
     dependency: "direct main"
     description:
       name: talker
-      sha256: "46a60c6014a870a71ab8e3fa22f9580a8d36faf9b39431dcf124940601c0c266"
+      sha256: c364edc0fbd6c648e1a78e6edd89cccd64df2150ca96d899ecd486b76c185042
       url: "https://pub.dev"
     source: hosted
-    version: "5.1.15"
+    version: "5.1.16"
   talker_flutter:
     dependency: transitive
     description:
       name: talker_flutter
-      sha256: "7e1819c505cdcbf2cf6497410b8fa3b33d170e6f137716bd278940c0e509f414"
+      sha256: "54cbbf852101721664faf4a05639fd2fdefdc37178327990abea00390690d4bc"
       url: "https://pub.dev"
     source: hosted
-    version: "5.1.15"
+    version: "5.1.16"
   talker_logger:
     dependency: transitive
     description:
       name: talker_logger
-      sha256: "70112d016d7b978ccb7ef0b0f4941e0f0b0de88d80589db43143cea1d744eae0"
+      sha256: cea1b8283a28c2118a0b197057fc5beb5b0672c75e40a48725e5e452c0278ff3
       url: "https://pub.dev"
     source: hosted
-    version: "5.1.15"
+    version: "5.1.16"
   term_glyph:
     dependency: transitive
     description:

useragent/pubspec.yaml

@@ -17,7 +17,7 @@ dependencies:
   riverpod: ^3.1.0
   hooks_riverpod: ^3.1.0
   sizer: ^3.1.3
-  biometric_signature: ^10.2.0
+  biometric_signature: ^11.0.1
   mtcore:
     hosted: https://git.markettakers.org/api/packages/MarketTakers/pub/
     version: ^1.0.6
@@ -34,6 +34,7 @@ dependencies:
   freezed_annotation: ^3.1.0
   json_annotation: ^4.9.0
   timeago: ^3.7.1
+  flutter_form_builder: ^10.3.0+2
 
 dev_dependencies:
   flutter_test: