Connect wallet transaction pagination to server API

Add paginated address transaction API

web/index.html

@@ -221,7 +221,7 @@
 
     .wallet-header {
       display: grid;
-      grid-template-columns: minmax(0, 1fr) auto auto;
+      grid-template-columns: minmax(0, 1fr) auto auto auto;
       align-items: center;
       gap: 24px;
       width: 100%;
@@ -281,6 +281,13 @@
       font-weight: 650;
     }
 
+    .wallet-chevron {
+      width: 20px;
+      color: var(--muted);
+      text-align: center;
+      font-size: 18px;
+    }
+
     .wallet-content {
       padding: 0 18px 18px;
       border-top: 1px solid var(--border);
@@ -503,9 +510,6 @@
       text-align: right;
     }
 
-    .transaction-chevron {
-      display: none;
-    }
 
     /* Login */
 
@@ -870,6 +874,7 @@
 
     const expandedWallets = new Set();
     const expandedTransactions = new Set();
+    const visibleTransactionCounts = new Map();
 
     const transactionCache = new Map();
 
@@ -1074,38 +1079,6 @@
       }
     }
 
-    function formatDateDateOnly(timestamp) {
-      const value = Number(timestamp);
-
-      if (!Number.isFinite(value)) {
-        return 'Unknown';
-      }
-
-      const date = new Date(value * 1000);
-
-      if (Number.isNaN(date.getTime())) {
-        return 'Unknown';
-      }
-
-      const pad = (number) => String(number).padStart(2, '0');
-      const year = date.getFullYear();
-      const shortYear = String(year).slice(-2);
-      const month = pad(date.getMonth() + 1);
-      const day = pad(date.getDate());
-
-      switch (dateFormat) {
-        case 'DD.MM.YYYY HH:MM':
-        case 'DD.MM.YY HH:MM':
-          return `${day}.${month}.${dateFormat.includes('YYYY') ? year : shortYear}`;
-        case 'YYYY-MM-DD HH:MM':
-          return `${year}-${month}-${day}`;
-        case 'MM/DD/YY HH:MM':
-          return `${month}/${day}/${shortYear}`;
-        default:
-          return `${day}.${month}.${shortYear}`;
-      }
-    }
-
     function formatSyncAge(date) {
       if (!date) {
         return 'Not synced';
@@ -1426,8 +1399,10 @@
       const lastActivity = getTransactionDateForLatest(wallet, latest);
 
       const lastActivityText = lastActivity
-        ? formatDateDateOnly(lastActivity)
-        : 'No activity';
+        ? formatDate(lastActivity)
+        : latest
+          ? `Block ${latest.height}`
+          : 'No activity';
 
       return `
         <article class="wallet">
@@ -1465,6 +1440,10 @@
                 ${escapeHtml(lastActivityText)}
               </div>
             </div>
+
+            <div class="wallet-chevron">
+              ${expanded ? 'v' : '>'}
+            </div>
           </button>
 
           ${
@@ -1498,8 +1477,115 @@
       });
     }
 
-    function renderWalletContent(wallet, transactionCount) {
-      const transactions = getWalletTransactions(wallet);
+    async function showMoreTransactions(encodedAddress) {
+      const address =
+        decodeURIComponent(
+          encodedAddress,
+        );
+
+      const wallet =
+        wallets.find(
+          (item) =>
+            item.address === address,
+        );
+
+      if (!wallet) {
+        return;
+      }
+
+      const current =
+        getWalletTransactions(wallet).length;
+
+      const total =
+        Number(wallet.transactionCount) ||
+        current;
+
+      if (current >= total) {
+        return;
+      }
+
+      const button =
+        document.querySelector(
+          `[data-show-more-address="${encodeURIComponent(address)}"]`,
+        );
+
+      if (button) {
+        button.disabled = true;
+        button.textContent = 'Loading...';
+      }
+
+      try {
+        const response =
+          await fetch(
+            `/api/addresses/transactions?address=${encodeURIComponent(address)}&offset=${current}&limit=50`,
+            {
+              credentials:
+                'same-origin',
+            },
+          );
+
+        if (
+          response.status === 401
+        ) {
+          showLogin();
+          return;
+        }
+
+        if (!response.ok) {
+          throw new Error(
+            `HTTP ${response.status}`,
+          );
+        }
+
+        const data =
+          await response.json();
+
+        const transactions =
+          Array.isArray(
+            data.transactions,
+          )
+            ? data.transactions
+            : [];
+
+        wallet.history = [
+          ...getWalletTransactions(wallet),
+          ...transactions,
+        ];
+
+        wallet.transactionCount =
+          Number(data.total) ||
+          wallet.history.length;
+
+        wallet.transactionOffset =
+          current;
+
+        renderWallets();
+      } catch (error) {
+        console.error(
+          'Failed to load more transactions:',
+          error,
+        );
+
+        renderWallets();
+      }
+    }
+
+    function renderWalletContent(
+      wallet,
+      transactionCount,
+    ) {
+      const transactions =
+        getWalletTransactions(wallet);
+
+      const visibleCount =
+        transactions.length;
+
+      const total =
+        Number(wallet.transactionCount) ||
+        transactions.length;
+
+      const hasMore =
+        visibleCount < total;
 
       return `
         <div class="wallet-content">
@@ -1509,13 +1595,32 @@
 
           ${
             transactions.length
-              ? renderTransactions(wallet, transactions)
+              ? renderTransactions(
+                  wallet,
+                  transactions,
+                )
               : `
                 <div class="empty">
                   No transactions found for this wallet.
                 </div>
               `
           }
+
+          ${
+            hasMore
+              ? `
+                <button
+                  class="button"
+                  type="button"
+                  data-show-more-address="${encodeURIComponent(wallet.address)}"
+                  onclick="showMoreTransactions('${encodeURIComponent(wallet.address)}')"
+                  style="width: 100%; margin-top: 14px;"
+                >
+                  Show more (${visibleCount} of ${total})
+                </button>
+              `
+              : ''
+          }
         </div>
       `;
     }
@@ -1539,7 +1644,10 @@
 
       const dateText = timestamp
         ? formatDate(timestamp)
-        : 'Loading...';
+        : transaction.height === null ||
+            transaction.height === undefined
+          ? 'Pending'
+          : `Block ${transaction.height}`;
 
       const directionLabel =
         display.direction === 'sent' ? 'Sent' : 'Received';
@@ -1710,19 +1818,6 @@
 
       renderWallets();
 
-      const wallet =
-        wallets.find(
-          (item) =>
-            item.address === address,
-        );
-
-      if (!wallet) {
-        return;
-      }
-
-      await loadWalletTransactionDetails(
-        wallet,
-      );
     }
 
     async function toggleTransaction(
@@ -1760,30 +1855,6 @@
       await loadTransaction(txid);
     }
 
-    async function loadWalletTransactionDetails(
-      wallet,
-    ) {
-      const transactions =
-        getWalletTransactions(wallet);
-
-      if (!transactions.length) {
-        return;
-      }
-
-      /*
-       * Load transaction details in parallel so the
-       * list can populate dates and amounts without
-       * requiring the user to open each transaction.
-       *
-       * Cached transactions are skipped by loadTransaction().
-       */
-      await Promise.all(
-        transactions.map((transaction) =>
-          loadTransaction(transaction.txid),
-        ),
-      );
-    }
-
     async function loadTransaction(
       txid,
     ) {