InjectedWeb3Connector.js 7.2 KB

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  1. var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
  2. Object.defineProperty(exports, "__esModule", {
  3. value: true
  4. });
  5. exports.default = exports.InjectedEvents = void 0;
  6. var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator"));
  7. var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
  8. var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
  9. var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
  10. var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));
  11. var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));
  12. var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));
  13. var _wrapNativeSuper2 = _interopRequireDefault(require("@babel/runtime/helpers/wrapNativeSuper"));
  14. var _AbstractWeb3Connector = _interopRequireDefault(require("./AbstractWeb3Connector"));
  15. var _events = _interopRequireDefault(require("events"));
  16. var _verifyChainId = _interopRequireDefault(require("../utils/verifyChainId"));
  17. function _createSuper(Derived) {
  18. var hasNativeReflectConstruct = _isNativeReflectConstruct();
  19. return function () {
  20. var Super = (0, _getPrototypeOf2.default)(Derived),
  21. result;
  22. if (hasNativeReflectConstruct) {
  23. var NewTarget = (0, _getPrototypeOf2.default)(this).constructor;
  24. result = Reflect.construct(Super, arguments, NewTarget);
  25. } else {
  26. result = Super.apply(this, arguments);
  27. }
  28. return (0, _possibleConstructorReturn2.default)(this, result);
  29. };
  30. }
  31. function _isNativeReflectConstruct() {
  32. if (typeof Reflect === "undefined" || !Reflect.construct) return false;
  33. if (Reflect.construct.sham) return false;
  34. if (typeof Proxy === "function") return true;
  35. try {
  36. Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
  37. return true;
  38. } catch (e) {
  39. return false;
  40. }
  41. }
  42. var InjectedEvents = Object.freeze({
  43. ACCOUNTS_CHANGED: 'accountsChanged',
  44. CHAIN_CHANGED: 'chainChanged',
  45. CONNECT: 'connect',
  46. DISCONNECT: 'disconnect'
  47. });
  48. exports.InjectedEvents = InjectedEvents;
  49. var NoEthereumProviderError = function (_Error) {
  50. (0, _inherits2.default)(NoEthereumProviderError, _Error);
  51. var _super = _createSuper(NoEthereumProviderError);
  52. function NoEthereumProviderError() {
  53. var _this;
  54. (0, _classCallCheck2.default)(this, NoEthereumProviderError);
  55. _this = _super.call(this);
  56. _this.message = 'Non ethereum enabled browser';
  57. return _this;
  58. }
  59. return (0, _createClass2.default)(NoEthereumProviderError);
  60. }((0, _wrapNativeSuper2.default)(Error));
  61. var InjectedWeb3Connector = function (_AbstractWeb3Connecto) {
  62. (0, _inherits2.default)(InjectedWeb3Connector, _AbstractWeb3Connecto);
  63. var _super2 = _createSuper(InjectedWeb3Connector);
  64. function InjectedWeb3Connector() {
  65. var _this2;
  66. (0, _classCallCheck2.default)(this, InjectedWeb3Connector);
  67. for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
  68. args[_key] = arguments[_key];
  69. }
  70. _this2 = _super2.call.apply(_super2, [this].concat(args));
  71. _this2.type = 'injected';
  72. return _this2;
  73. }
  74. (0, _createClass2.default)(InjectedWeb3Connector, [{
  75. key: "verifyEthereumBrowser",
  76. value: function () {
  77. var _window;
  78. if (!((_window = window) != null && _window.ethereum)) {
  79. throw new NoEthereumProviderError();
  80. }
  81. }
  82. }, {
  83. key: "activate",
  84. value: function () {
  85. var _await$Promise$all, _await$Promise$all2, accounts, chainId, account, provider;
  86. return _regenerator.default.async(function (_context) {
  87. while (1) {
  88. switch (_context.prev = _context.next) {
  89. case 0:
  90. this.verifyEthereumBrowser();
  91. _context.next = 3;
  92. return _regenerator.default.awrap(Promise.all([window.ethereum.request({
  93. method: 'eth_requestAccounts'
  94. }), window.ethereum.request({
  95. method: 'eth_chainId'
  96. })]));
  97. case 3:
  98. _await$Promise$all = _context.sent;
  99. _await$Promise$all2 = (0, _slicedToArray2.default)(_await$Promise$all, 2);
  100. accounts = _await$Promise$all2[0];
  101. chainId = _await$Promise$all2[1];
  102. account = accounts[0] ? accounts[0].toLowerCase() : null;
  103. provider = window.ethereum;
  104. this.chainId = chainId;
  105. this.account = account;
  106. this.provider = provider;
  107. this.subscribeToEvents(provider);
  108. return _context.abrupt("return", {
  109. provider: provider,
  110. chainId: chainId,
  111. account: account
  112. });
  113. case 14:
  114. case "end":
  115. return _context.stop();
  116. }
  117. }
  118. }, null, this, null, Promise);
  119. }
  120. }, {
  121. key: "switchNetwork",
  122. value: function (chainId) {
  123. var currentNetwork;
  124. return _regenerator.default.async(function (_context2) {
  125. while (1) {
  126. switch (_context2.prev = _context2.next) {
  127. case 0:
  128. this.verifyEthereumBrowser();
  129. chainId = (0, _verifyChainId.default)(chainId);
  130. currentNetwork = this.chainId;
  131. if (!(currentNetwork === chainId)) {
  132. _context2.next = 5;
  133. break;
  134. }
  135. return _context2.abrupt("return");
  136. case 5:
  137. _context2.next = 7;
  138. return _regenerator.default.awrap(window.ethereum.request({
  139. method: 'wallet_switchEthereumChain',
  140. params: [{
  141. chainId: chainId
  142. }]
  143. }));
  144. case 7:
  145. case "end":
  146. return _context2.stop();
  147. }
  148. }
  149. }, null, this, null, Promise);
  150. }
  151. }, {
  152. key: "addNetwork",
  153. value: function (chainId, chainName, currencyName, currencySymbol, rpcUrl, blockExplorerUrl) {
  154. var newchainId;
  155. return _regenerator.default.async(function (_context3) {
  156. while (1) {
  157. switch (_context3.prev = _context3.next) {
  158. case 0:
  159. this.verifyEthereumBrowser();
  160. newchainId = (0, _verifyChainId.default)(chainId);
  161. _context3.next = 4;
  162. return _regenerator.default.awrap(window.ethereum.request({
  163. method: 'wallet_addEthereumChain',
  164. params: [{
  165. chainId: newchainId,
  166. chainName: chainName,
  167. nativeCurrency: {
  168. name: currencyName,
  169. symbol: currencySymbol,
  170. decimals: 18
  171. },
  172. rpcUrls: [rpcUrl],
  173. blockExplorerUrls: blockExplorerUrl ? [blockExplorerUrl] : null
  174. }]
  175. }));
  176. case 4:
  177. case "end":
  178. return _context3.stop();
  179. }
  180. }
  181. }, null, this, null, Promise);
  182. }
  183. }]);
  184. return InjectedWeb3Connector;
  185. }(_AbstractWeb3Connector.default);
  186. var _default = InjectedWeb3Connector;
  187. exports.default = _default;