';
132 | document.querySelector(`#${this.containerId}`).innerHTML = dropdownHtml;
133 | }
134 |
135 | #configureDropdownListeners() {
136 | for (const wallet in CardanoDApp.SUPPORTED_WALLETS) {
137 | document.querySelector(`#${this.containerId}-${wallet}`).addEventListener("click", async e => {
138 | e && e.preventDefault();
139 | await this.connectWallet(wallet);
140 | });
141 | }
142 | }
143 |
144 | #getBannerEl() {
145 | return `${this.containerId}-header`;
146 | }
147 |
148 | async connectWallet(walletName) {
149 | if (!CardanoDApp.#isWalletSupported(walletName)) {
150 | return;
151 | }
152 |
153 | try {
154 | const wallet = await CardanoDApp.#enableWallet(walletName);
155 | const address = await wallet.getChangeAddress();
156 | this.selectedWallet = walletName;
157 | this.#displayWallet();
158 | Toastify({
159 | text: `Successfully connected wallet ${address}!`,
160 | duration: 3000
161 | }).showToast();
162 | window.postMessage({
163 | type: "CARDANO_DAPP_JS_CONNECT",
164 | wallet: { provider: walletName, address: address }
165 | }, "*");
166 | } catch (err) {
167 | CardanoDApp.#toastWalletError(err);
168 | }
169 | }
170 |
171 | #displayWallet() {
172 | if (this.isWalletConnected() && this.containerId) {
173 | document.querySelector(`#${this.#getBannerEl()}`).textContent = `Connected to ${this.selectedWallet}!`;
174 | }
175 | }
176 |
177 | getConnectedWallet() {
178 | if (this.selectedWallet === undefined) {
179 | throw 'No wallet connected to enable';
180 | }
181 | return CardanoDApp.#enableWallet(this.selectedWallet);
182 | }
183 |
184 | async numPolicyAssets(policy) {
185 | const policyAssets = {};
186 | const currentWallet = await this.getConnectedWallet();
187 | const utxos = await currentWallet.getUtxos();
188 | for (const utxoStr of utxos) {
189 | const utxoBytes = fromHex(utxoStr);
190 | const coreUtxo = LCore.TransactionUnspentOutput.from_bytes(utxoBytes);
191 | const utxo = coreToUtxo(coreUtxo)
192 | const assets = utxo.assets;
193 | for (const asset in assets) {
194 | if (asset.startsWith(policy)) {
195 | policyAssets[asset] = assets[asset];
196 | }
197 | }
198 | }
199 | return Object.values(policyAssets).reduce((acc, amount) => acc + amount, 0n);
200 | }
201 |
202 | async walletMeetsTokenGate(tokenGateMap) {
203 | for (const policy in tokenGateMap) {
204 | const numPolicyAssets = await this.numPolicyAssets(policy);
205 | if (numPolicyAssets >= tokenGateMap[policy]) {
206 | return true;
207 | }
208 | }
209 | return false;
210 | }
211 |
212 | isWalletConnected() {
213 | return this.selectedWallet !== undefined;
214 | }
215 |
216 | }
217 |
--------------------------------------------------------------------------------
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