Update for devnet (#55)

* `linera-protocol`: bump to `devnet_2025_06_27`

* Update examples for devnet

* `examples/hosted-fungible`: support Ethereum-style account owners

* `.env`: update app IDs for new devnet

* `examples/hosted-counter-metamask`: update signer API

* `hosted-fungible`: check balance before requesting notifications

Author: Twey

.env

@@ -1,3 +1,4 @@
-VITE_FAUCET_URL=https://faucet.testnet-babbage.linera.net
-VITE_COUNTER_APP_ID=
-VITE_FUNGIBLE_APP_ID=
+VITE_FAUCET_URL=https://faucet.devnet-2025-06-27.linera.net/
+VITE_FUNGIBLE_APP_ID=bca9f0d106dadea4d7e879a729a3882a2c094ef1a0300596f64c5ce640f8cf10
+VITE_COUNTER_APP_ID=ef1977bfc2291069044a0650c73895d1ef8f8b1a850a5d8320c8da50b0c083c3
+

examples/hosted-counter-metamask/.env

@@ -0,0 +1 @@
+../../.env

examples/hosted-counter-metamask/index.html

@@ -66,7 +66,7 @@ <h2>Chain history for <code id="chain-id" class="hex">requesting chain…</code>
       async function run() {
           await linera.default();
           const faucet = await new linera.Faucet(import.meta.env.VITE_FAUCET_URL);
-          const signer = await new linera_signer.MetaMaskEIP191Signer();
+          const signer = await new linera_signer.MetaMask();
           const wallet = await faucet.createWallet();
           const owner = await signer.address();
           document.getElementById('owner').innerText = owner;

examples/hosted-fungible/index.html

@@ -163,7 +163,7 @@ <h2>Chain history for <code id="chain-id" class="hex">requesting a new microchai
           const response = JSON.parse(await application.query(gql(`query { tickerSymbol, accounts { entries { key value } } }`)));
           console.debug('application response:', response);
           document.querySelector('#ticker-symbol').textContent = response.data.tickerSymbol;
-          document.querySelector('#balance').textContent = (+(response?.data?.accounts?.entries?.[0] || 0)).toFixed(2);
+          document.querySelector('#balance').textContent = (+(response?.data?.accounts?.entries?.[0]?.value || 0)).toFixed(2);
       }
 
       async function transfer(application, donor, amount, recipient) {
@@ -174,7 +174,7 @@ <h2>Chain history for <code id="chain-id" class="hex">requesting a new microchai
 
           let errors = [];
           try {
-              const match = recipient.match(/^(0x[0-9a-f]{64})@([0-9a-f]{64})$/);
+              const match = recipient.match(/^(0x[0-9a-f]{40})@([0-9a-f]{64})$/);
               if (!match) throw new Error('Invalid recipient address: expected `owner@chain_id`');
 
               const query = gql(`mutation(
@@ -232,6 +232,8 @@ <h2>Chain history for <code id="chain-id" class="hex">requesting a new microchai
 
           const application = await client.frontend().application(FUNGIBLE_APP_ID);
 
+          await updateBalance(application);
+
           client.onNotification(notification => {
               let newBlock = notification.reason.NewBlock;
               if (!newBlock) return;