| 1 | import 'package:cake_wallet/core/address_validator.dart'; |
| 2 | import 'package:cake_wallet/generated/i18n.dart'; |
| 3 | import 'package:cake_wallet/new-ui/widgets/coins_page/token_image_widget.dart'; |
| 4 | import 'package:cake_wallet/src/screens/base_page.dart'; |
| 5 | import 'package:cake_wallet/src/widgets/address_text_field.dart'; |
| 6 | import 'package:cake_wallet/src/widgets/alert_with_one_action.dart'; |
| 7 | import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart'; |
| 8 | import 'package:cake_wallet/src/widgets/base_text_form_field.dart'; |
| 9 | import 'package:cake_wallet/src/widgets/cake_image_widget.dart'; |
| 10 | import 'package:cake_wallet/src/widgets/checkbox_widget.dart'; |
| 11 | import 'package:cake_wallet/src/widgets/primary_button.dart'; |
| 12 | import 'package:cake_wallet/src/widgets/scrollable_with_bottom_section.dart'; |
| 13 | import 'package:cake_wallet/src/widgets/warning_box_widget.dart'; |
| 14 | import 'package:cake_wallet/themes/core/theme_extension.dart'; |
| 15 | import 'package:cake_wallet/utils/show_pop_up.dart'; |
| 16 | import 'package:cake_wallet/view_model/dashboard/home_settings_view_model.dart'; |
| 17 | import 'package:cw_core/crypto_currency.dart'; |
| 18 | import 'package:cw_core/utils/homoglyph_normalizer.dart'; |
| 19 | import 'package:cw_core/wallet_type.dart'; |
| 20 | import 'package:dotted_border/dotted_border.dart'; |
| 21 | import 'package:flutter/material.dart'; |
| 22 | import 'package:flutter/services.dart'; |
| 23 | import 'package:flutter_mobx/flutter_mobx.dart'; |
| 24 | |
| 25 | class EditTokenPage extends BasePage { |
| 26 | EditTokenPage({ |
| 27 | Key? key, |
| 28 | required this.homeSettingsViewModel, |
| 29 | this.token, |
| 30 | this.initialContractAddress, |
| 31 | }) : assert(token == null || initialContractAddress == null); |
| 32 | |
| 33 | final HomeSettingsViewModel homeSettingsViewModel; |
| 34 | final CryptoCurrency? token; |
| 35 | final String? initialContractAddress; |
| 36 | |
| 37 | @override |
| 38 | String? get title => (token != null || initialContractAddress != null) |
| 39 | ? S.current.edit_token |
| 40 | : S.current.add_token; |
| 41 | |
| 42 | @override |
| 43 | Widget body(BuildContext context) => EditTokenPageBody( |
| 44 | homeSettingsViewModel: homeSettingsViewModel, |
| 45 | token: token, |
| 46 | initialContractAddress: initialContractAddress, |
| 47 | ); |
| 48 | } |
| 49 | |
| 50 | class EditTokenPageBody extends StatefulWidget { |
| 51 | const EditTokenPageBody({ |
| 52 | Key? key, |
| 53 | required this.homeSettingsViewModel, |
| 54 | this.token, |
| 55 | this.initialContractAddress, |
| 56 | }) : super(key: key); |
| 57 | |
| 58 | final HomeSettingsViewModel homeSettingsViewModel; |
| 59 | final CryptoCurrency? token; |
| 60 | final String? initialContractAddress; |
| 61 | |
| 62 | @override |
| 63 | State<EditTokenPageBody> createState() => _EditTokenPageBodyState(); |
| 64 | } |
| 65 | |
| 66 | class _EditTokenPageBodyState extends State<EditTokenPageBody> { |
| 67 | final TextEditingController _contractAddressController = TextEditingController(); |
| 68 | final TextEditingController _tokenNameController = TextEditingController(); |
| 69 | final TextEditingController _tokenSymbolController = TextEditingController(); |
| 70 | final TextEditingController _tokenDecimalController = TextEditingController(); |
| 71 | final TextEditingController _tokenIconPathController = TextEditingController(); |
| 72 | |
| 73 | final FocusNode _contractAddressFocusNode = FocusNode(); |
| 74 | final FocusNode _tokenNameFocusNode = FocusNode(); |
| 75 | final FocusNode _tokenSymbolFocusNode = FocusNode(); |
| 76 | final FocusNode _tokenDecimalFocusNode = FocusNode(); |
| 77 | |
| 78 | final GlobalKey<FormState> _formKey = GlobalKey<FormState>(); |
| 79 | |
| 80 | bool _showDisclaimer = false; |
| 81 | bool _disclaimerChecked = false; |
| 82 | bool isEditingToken = false; |
| 83 | bool _isTokenVerified = false; |
| 84 | bool _isJupiterVerified = false; |
| 85 | String? _jupiterVerifiedAddress; |
| 86 | |
| 87 | bool get _isJupiterVerifiedForCurrentAddress => |
| 88 | _isJupiterVerified && _jupiterVerifiedAddress == _contractAddressController.text; |
| 89 | |
| 90 | @override |
| 91 | void initState() { |
| 92 | super.initState(); |
| 93 | |
| 94 | String? address; |
| 95 | |
| 96 | if (widget.token != null) { |
| 97 | address = widget.homeSettingsViewModel.getTokenAddressBasedOnWallet(widget.token!); |
| 98 | |
| 99 | _contractAddressController.text = address ?? ''; |
| 100 | _tokenNameController.text = widget.token!.name; |
| 101 | _tokenSymbolController.text = widget.token!.title; |
| 102 | _tokenDecimalController.text = widget.token!.decimals.toString(); |
| 103 | _tokenIconPathController.text = widget.token?.iconPath ?? ''; |
| 104 | |
| 105 | isEditingToken = true; |
| 106 | |
| 107 | _checkIfTokenIsVerified(address); |
| 108 | } |
| 109 | |
| 110 | if (widget.initialContractAddress != null) { |
| 111 | _contractAddressController.text = widget.initialContractAddress!; |
| 112 | _getTokenInfo(); |
| 113 | } |
| 114 | |
| 115 | _contractAddressFocusNode.addListener(() { |
| 116 | if (!_contractAddressFocusNode.hasFocus) { |
| 117 | _getTokenInfo(); |
| 118 | } |
| 119 | |
| 120 | final contractAddress = _contractAddressController.text; |
| 121 | if (contractAddress.isNotEmpty && contractAddress != address) { |
| 122 | setState(() { |
| 123 | _showDisclaimer = true; |
| 124 | }); |
| 125 | } |
| 126 | }); |
| 127 | } |
| 128 | |
| 129 | void _checkIfTokenIsVerified(String? contractAddress) { |
| 130 | if (contractAddress == null) return; |
| 131 | |
| 132 | final isVerified = widget.homeSettingsViewModel.checkIfTokenIsWhitelisted(contractAddress); |
| 133 | |
| 134 | if (!mounted) return; |
| 135 | |
| 136 | setState(() { |
| 137 | _isTokenVerified = isVerified; |
| 138 | }); |
| 139 | |
| 140 | _checkIfTokenIsVerifiedOnJupiter(contractAddress); |
| 141 | } |
| 142 | |
| 143 | Future<void> _checkIfTokenIsVerifiedOnJupiter(String contractAddress) async { |
| 144 | final isVerified = |
| 145 | await widget.homeSettingsViewModel.checkIfTokenIsVerifiedOnJupiter(contractAddress); |
| 146 | |
| 147 | if (!mounted || _contractAddressController.text != contractAddress) return; |
| 148 | |
| 149 | setState(() { |
| 150 | _isJupiterVerified = isVerified ?? false; |
| 151 | _jupiterVerifiedAddress = contractAddress; |
| 152 | }); |
| 153 | } |
| 154 | |
| 155 | @override |
| 156 | Widget build(BuildContext context) => GestureDetector( |
| 157 | onTap: () => FocusScope.of(context).unfocus(), |
| 158 | child: ScrollableWithBottomSection( |
| 159 | contentPadding: EdgeInsets.zero, |
| 160 | content: Padding( |
| 161 | padding: EdgeInsets.symmetric(horizontal: 25), |
| 162 | child: Column( |
| 163 | children: [ |
| 164 | SizedBox(height: 30), |
| 165 | WarningBox( |
| 166 | padding: EdgeInsets.all(16), |
| 167 | content: S.of(context).add_token_warning, |
| 168 | showBorder: false, |
| 169 | textWeight: FontWeight.w500, |
| 170 | textAlign: TextAlign.start, |
| 171 | textColor: context.customColors.warningOutlineColor, |
| 172 | iconSize: 22, |
| 173 | iconSpacing: 16, |
| 174 | ), |
| 175 | SizedBox(height: 50), |
| 176 | _tokenForm(), |
| 177 | ], |
| 178 | ), |
| 179 | ), |
| 180 | bottomSectionPadding: EdgeInsets.only(left: 24, right: 24, bottom: 48), |
| 181 | bottomSection: Column( |
| 182 | children: [ |
| 183 | if (_showDisclaimer) ...[ |
| 184 | CheckboxWidget( |
| 185 | value: _disclaimerChecked, |
| 186 | caption: S.of(context).add_token_disclaimer_check, |
| 187 | onChanged: (value) { |
| 188 | _disclaimerChecked = value; |
| 189 | }, |
| 190 | ), |
| 191 | SizedBox(height: 20), |
| 192 | ], |
| 193 | Observer( |
| 194 | builder: (context) => Row( |
| 195 | children: <Widget>[ |
| 196 | Expanded( |
| 197 | child: LoadingPrimaryButton( |
| 198 | isLoading: widget.homeSettingsViewModel.isDeletingToken, |
| 199 | onPressed: () async { |
| 200 | if (widget.token != null) { |
| 201 | await widget.homeSettingsViewModel.deleteToken(widget.token!); |
| 202 | } |
| 203 | Navigator.pop(context); |
| 204 | }, |
| 205 | text: widget.token != null ? S.of(context).delete : S.of(context).cancel, |
| 206 | color: isEditingToken |
| 207 | ? Theme.of(context).colorScheme.errorContainer |
| 208 | : Theme.of(context).colorScheme.surfaceContainer, |
| 209 | textColor: isEditingToken |
| 210 | ? Theme.of(context).colorScheme.onErrorContainer |
| 211 | : Theme.of(context).colorScheme.primary, |
| 212 | ), |
| 213 | ), |
| 214 | SizedBox(width: 20), |
| 215 | Expanded( |
| 216 | child: LoadingPrimaryButton( |
| 217 | isLoading: widget.homeSettingsViewModel.isAddingToken || |
| 218 | widget.homeSettingsViewModel.isValidatingContractAddress, |
| 219 | onPressed: () async { |
| 220 | if (_formKey.currentState!.validate() && |
| 221 | (!_showDisclaimer || _disclaimerChecked)) { |
| 222 | final isTokenAlreadyAdded = isEditingToken |
| 223 | ? false |
| 224 | : await widget.homeSettingsViewModel |
| 225 | .checkIfTokenIsAlreadyAdded(_contractAddressController.text); |
| 226 | if (isTokenAlreadyAdded) { |
| 227 | showPopUp<void>( |
| 228 | context: context, |
| 229 | builder: (dialogContext) => AlertWithOneAction( |
| 230 | alertTitle: S.current.warning, |
| 231 | alertContent: S.of(context).token_already_exists, |
| 232 | buttonText: S.of(context).ok, |
| 233 | buttonAction: () => Navigator.of(dialogContext).pop(), |
| 234 | ), |
| 235 | ); |
| 236 | return; |
| 237 | } |
| 238 | |
| 239 | final isWhitelisted = await widget.homeSettingsViewModel |
| 240 | .checkIfTokenIsWhitelisted(_contractAddressController.text); |
| 241 | |
| 242 | final isTrusted = isWhitelisted || _isJupiterVerifiedForCurrentAddress; |
| 243 | |
| 244 | final hasPotentialError = !isTrusted && |
| 245 | await widget.homeSettingsViewModel |
| 246 | .checkIfERC20TokenContractAddressIsAPotentialScamAddress( |
| 247 | _contractAddressController.text, |
| 248 | ); |
| 249 | |
| 250 | bool isPotentialScam = hasPotentialError && !isTrusted; |
| 251 | |
| 252 | // Normalize to catch homoglyph spoofing attacks |
| 253 | final tokenSymbol = normalizeHomoglyphs( |
| 254 | _tokenSymbolController.text.trim().toUpperCase(), |
| 255 | ); |
| 256 | |
| 257 | // check if the token symbol is the same as the native token symbol |
| 258 | // to prevent token impersonation |
| 259 | // (e.g. fake ETH on Ethereum, fake SOL on Solana) |
| 260 | final nativeSymbol = |
| 261 | widget.homeSettingsViewModel.nativeToken.title.toUpperCase(); |
| 262 | if (tokenSymbol == nativeSymbol && !isTrusted) { |
| 263 | isPotentialScam = true; |
| 264 | } |
| 265 | |
| 266 | // check if the token symbol is the same as any of the default token symbols |
| 267 | // (e.g. fake USDC, USDT with wrong contract address) |
| 268 | if (widget.homeSettingsViewModel.checkIfTokenSymbolMatchesDefaultToken( |
| 269 | tokenSymbol, |
| 270 | ) && |
| 271 | !isTrusted) { |
| 272 | isPotentialScam = true; |
| 273 | } |
| 274 | |
| 275 | final actionCall = () async { |
| 276 | try { |
| 277 | await widget.homeSettingsViewModel.addToken( |
| 278 | token: CryptoCurrency( |
| 279 | name: _tokenNameController.text, |
| 280 | title: _tokenSymbolController.text.toUpperCase(), |
| 281 | decimals: int.parse(_tokenDecimalController.text), |
| 282 | iconPath: _tokenIconPathController.text.isNotEmpty |
| 283 | ? _tokenIconPathController.text |
| 284 | : null, |
| 285 | isPotentialScam: isPotentialScam, |
| 286 | ), |
| 287 | contractAddress: _contractAddressController.text, |
| 288 | ); |
| 289 | |
| 290 | if (mounted) { |
| 291 | Navigator.pop(context); |
| 292 | } |
| 293 | } catch (e) { |
| 294 | showPopUp<void>( |
| 295 | context: context, |
| 296 | builder: (dialogContext) => AlertWithOneAction( |
| 297 | alertTitle: S.current.warning, |
| 298 | alertContent: e.toString(), |
| 299 | buttonText: S.of(context).ok, |
| 300 | buttonAction: () => Navigator.of(dialogContext).pop(), |
| 301 | ), |
| 302 | ); |
| 303 | } |
| 304 | }; |
| 305 | |
| 306 | if (hasPotentialError && !isTrusted) { |
| 307 | showPopUp<void>( |
| 308 | context: context, |
| 309 | builder: (dialogContext) => AlertWithTwoActions( |
| 310 | alertTitle: S.current.warning, |
| 311 | alertContent: S.current.contract_warning, |
| 312 | rightButtonText: S.of(context).continue_text, |
| 313 | leftButtonText: S.of(context).cancel, |
| 314 | actionRightButton: () async { |
| 315 | Navigator.of(dialogContext).pop(); |
| 316 | await actionCall(); |
| 317 | }, |
| 318 | actionLeftButton: () => Navigator.of(dialogContext).pop(), |
| 319 | ), |
| 320 | ); |
| 321 | } else { |
| 322 | try { |
| 323 | await actionCall(); |
| 324 | } catch (e) { |
| 325 | showPopUp<void>( |
| 326 | context: context, |
| 327 | builder: (dialogContext) => AlertWithOneAction( |
| 328 | alertTitle: "Unable to add token", |
| 329 | alertContent: "$e", |
| 330 | buttonText: S.of(context).ok, |
| 331 | buttonAction: () => Navigator.of(context).pop(), |
| 332 | ), |
| 333 | ); |
| 334 | } |
| 335 | if (mounted) { |
| 336 | Navigator.pop(context); |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | }, |
| 341 | text: S.of(context).save, |
| 342 | color: Theme.of(context).colorScheme.primary, |
| 343 | textColor: Theme.of(context).colorScheme.onPrimary, |
| 344 | ), |
| 345 | ), |
| 346 | ], |
| 347 | ), |
| 348 | ), |
| 349 | ], |
| 350 | ), |
| 351 | ), |
| 352 | ); |
| 353 | |
| 354 | void _getTokenInfo() async { |
| 355 | if (_contractAddressController.text.isNotEmpty) { |
| 356 | final token = await widget.homeSettingsViewModel.getToken(_contractAddressController.text); |
| 357 | |
| 358 | if (!mounted) return; |
| 359 | |
| 360 | if (token != null) { |
| 361 | final isZano = widget.homeSettingsViewModel.walletType == WalletType.zano; |
| 362 | if (_tokenNameController.text.isEmpty || isZano) _tokenNameController.text = token.name; |
| 363 | if (_tokenSymbolController.text.isEmpty || isZano) |
| 364 | _tokenSymbolController.text = token.title; |
| 365 | if (_tokenIconPathController.text.isEmpty) |
| 366 | _tokenIconPathController.text = token.iconPath ?? ''; |
| 367 | if (_tokenDecimalController.text.isEmpty || isZano) |
| 368 | _tokenDecimalController.text = token.decimals.toString(); |
| 369 | |
| 370 | _checkIfTokenIsVerified(_contractAddressController.text); |
| 371 | } |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | Future<void> _pasteText() async { |
| 376 | final value = await Clipboard.getData('text/plain'); |
| 377 | |
| 378 | if (value?.text?.isNotEmpty ?? false) { |
| 379 | _contractAddressController.text = value!.text!; |
| 380 | |
| 381 | _getTokenInfo(); |
| 382 | setState(() { |
| 383 | _showDisclaimer = true; |
| 384 | }); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | Widget _tokenForm() => Form( |
| 389 | key: _formKey, |
| 390 | child: Column( |
| 391 | mainAxisSize: MainAxisSize.min, |
| 392 | crossAxisAlignment: CrossAxisAlignment.center, |
| 393 | children: [ |
| 394 | _tokenIconPathController.text.isEmpty |
| 395 | ? DottedBorder( |
| 396 | borderType: BorderType.Circle, |
| 397 | dashPattern: [6, 4], |
| 398 | color: Theme.of(context).colorScheme.surfaceContainerHighest, |
| 399 | strokeWidth: 2, |
| 400 | radius: Radius.circular(15), |
| 401 | child: Container(width: 75, height: 75), |
| 402 | ) |
| 403 | : Stack( |
| 404 | alignment: Alignment.center, |
| 405 | children: [ |
| 406 | ClipOval( |
| 407 | child: TokenImageWidget( |
| 408 | imageUrl: _tokenIconPathController.text, |
| 409 | size: 75, |
| 410 | ), |
| 411 | ), |
| 412 | if (_isTokenVerified || _isJupiterVerifiedForCurrentAddress) |
| 413 | Positioned( |
| 414 | bottom: 0, |
| 415 | right: 0, |
| 416 | child: Container( |
| 417 | padding: EdgeInsets.all(4), |
| 418 | decoration: BoxDecoration( |
| 419 | color: Theme.of(context).colorScheme.primary, |
| 420 | shape: BoxShape.circle, |
| 421 | border: Border.all( |
| 422 | color: Theme.of(context).colorScheme.surface, |
| 423 | width: 2, |
| 424 | ), |
| 425 | ), |
| 426 | child: Icon( |
| 427 | Icons.check, |
| 428 | size: 16, |
| 429 | color: Theme.of(context).colorScheme.onPrimary, |
| 430 | ), |
| 431 | ), |
| 432 | ), |
| 433 | ], |
| 434 | ), |
| 435 | if (_isJupiterVerifiedForCurrentAddress) ...[ |
| 436 | const SizedBox(height: 12), |
| 437 | Text( |
| 438 | S.of(context).token_verified_on_jupiter, |
| 439 | style: Theme.of(context).textTheme.bodyMedium?.copyWith( |
| 440 | fontWeight: FontWeight.w500, |
| 441 | color: Theme.of(context).colorScheme.primary, |
| 442 | ), |
| 443 | ), |
| 444 | ], |
| 445 | SizedBox(height: 25), |
| 446 | AddressTextField( |
| 447 | controller: _contractAddressController, |
| 448 | focusNode: _contractAddressFocusNode, |
| 449 | placeholder: S.of(context).contract_address, |
| 450 | copyImagePath: 'assets/images/copy.png', |
| 451 | options: [AddressTextFieldOption.paste], |
| 452 | validator: widget.homeSettingsViewModel.walletType == WalletType.zano |
| 453 | ? null |
| 454 | : AddressValidator(type: widget.homeSettingsViewModel.nativeToken).call, |
| 455 | onPushPasteButton: (_) { |
| 456 | _pasteText(); |
| 457 | }, |
| 458 | ), |
| 459 | const SizedBox(height: 16), |
| 460 | isEditingToken |
| 461 | ? WarningBox( |
| 462 | padding: EdgeInsets.all(16), |
| 463 | content: S.of(context).tokens_strong_warning, |
| 464 | showBorder: false, |
| 465 | textWeight: FontWeight.w500, |
| 466 | textColor: context.customColors.warningOutlineColor, |
| 467 | showIcon: false, |
| 468 | ) |
| 469 | : Text( |
| 470 | S.of(context).tokens_strong_warning, |
| 471 | style: Theme.of(context).textTheme.bodyMedium?.copyWith( |
| 472 | fontWeight: FontWeight.w500, |
| 473 | color: Theme.of(context).colorScheme.onSurface, |
| 474 | ), |
| 475 | ), |
| 476 | const SizedBox(height: 24), |
| 477 | Divider( |
| 478 | color: Theme.of(context).colorScheme.surfaceContainerHighest, |
| 479 | height: 1, |
| 480 | ), |
| 481 | const SizedBox(height: 24), |
| 482 | BaseTextFormField( |
| 483 | controller: _tokenNameController, |
| 484 | focusNode: _tokenNameFocusNode, |
| 485 | onSubmit: (_) => FocusScope.of(context).requestFocus(_tokenSymbolFocusNode), |
| 486 | textInputAction: TextInputAction.next, |
| 487 | hintText: S.of(context).token_name, |
| 488 | validator: (text) { |
| 489 | if (text?.isNotEmpty ?? false) { |
| 490 | return null; |
| 491 | } |
| 492 | |
| 493 | return S.of(context).field_required; |
| 494 | }, |
| 495 | ), |
| 496 | const SizedBox(height: 10), |
| 497 | BaseTextFormField( |
| 498 | controller: _tokenSymbolController, |
| 499 | focusNode: _tokenSymbolFocusNode, |
| 500 | onSubmit: (_) => FocusScope.of(context).requestFocus(_tokenDecimalFocusNode), |
| 501 | textInputAction: TextInputAction.next, |
| 502 | hintText: S.of(context).token_symbol, |
| 503 | validator: (text) { |
| 504 | if (text?.isNotEmpty ?? false) { |
| 505 | return null; |
| 506 | } |
| 507 | |
| 508 | return S.of(context).field_required; |
| 509 | }, |
| 510 | ), |
| 511 | const SizedBox(height: 10), |
| 512 | BaseTextFormField( |
| 513 | controller: _tokenDecimalController, |
| 514 | focusNode: _tokenDecimalFocusNode, |
| 515 | textInputAction: TextInputAction.done, |
| 516 | hintText: S.of(context).token_decimal, |
| 517 | validator: (text) { |
| 518 | if (text?.isEmpty ?? true) { |
| 519 | return S.of(context).field_required; |
| 520 | } |
| 521 | |
| 522 | if (int.tryParse(text!) == null) { |
| 523 | return S.of(context).invalid_input; |
| 524 | } |
| 525 | |
| 526 | if (int.tryParse(text) == 0) { |
| 527 | return S.current.decimals_cannot_be_zero; |
| 528 | } |
| 529 | |
| 530 | return null; |
| 531 | }, |
| 532 | ), |
| 533 | SizedBox(height: 24), |
| 534 | ], |
| 535 | ), |
| 536 | ); |
| 537 | } |