feat: show red warning when sending to address with zero tx history

On the confirm-tx view, asynchronously check the recipient address
transaction count via getTransactionCount(). If zero, display a
prominent red warning advising the user to double-check the address.

Closes #82

src/popup/index.html

@@ -104,10 +104,6 @@
                         class="border border-border p-1 w-full font-mono text-sm bg-bg text-fg"
                     />
                 </div>
-                <div
-                    id="add-wallet-error"
-                    class="text-xs min-h-[1.25rem] mb-2"
-                ></div>
                 <button
                     id="btn-add-wallet-confirm"
                     class="border border-border px-2 py-1 hover:bg-fg hover:text-bg cursor-pointer"
@@ -166,10 +162,6 @@
                         class="border border-border p-1 w-full font-mono text-sm bg-bg text-fg"
                     />
                 </div>
-                <div
-                    id="import-key-error"
-                    class="text-xs min-h-[1.25rem] mb-2"
-                ></div>
                 <button
                     id="btn-import-key-confirm"
                     class="border border-border px-2 py-1 hover:bg-fg hover:text-bg cursor-pointer"
@@ -373,8 +365,8 @@
                     transfer all funds from this address. Never share it.
                 </p>
                 <div
-                    id="export-privkey-error"
-                    class="text-xs min-h-[1.25rem] mb-2"
+                    id="export-privkey-flash"
+                    class="text-xs mb-2 hidden"
                 ></div>
                 <div id="export-privkey-password-section" class="mb-2">
                     <label class="block mb-1">Password</label>
@@ -589,11 +581,23 @@
                     id="confirm-errors"
                     class="mb-2 border border-border border-dashed p-2 hidden"
                 ></div>
+                <div class="mb-2">
+                    <label class="block mb-1 text-xs">Password</label>
+                    <input
+                        type="password"
+                        id="confirm-tx-password"
+                        class="border border-border p-1 w-full font-mono text-sm bg-bg text-fg"
+                    />
+                </div>
+                <div
+                    id="confirm-tx-password-error"
+                    class="text-xs mb-2 min-h-[1.25rem]"
+                ></div>
                 <button
                     id="btn-confirm-send"
                     class="border border-border px-2 py-1 hover:bg-fg hover:text-bg cursor-pointer"
                 >
-                    Send
+                    Sign &amp; Send
                 </button>
             </div>
 
@@ -672,42 +676,6 @@
                 </button>
             </div>
 
-            <!-- ============ PASSWORD MODAL ============ -->
-            <div
-                id="password-modal"
-                class="hidden fixed inset-0 bg-bg flex items-center justify-center z-50"
-            >
-                <div class="border border-border p-4 bg-bg w-80">
-                    <h2 class="font-bold mb-2">Enter Password</h2>
-                    <p class="text-xs text-muted mb-2">
-                        Your password is needed to authorize this transaction.
-                    </p>
-                    <input
-                        type="password"
-                        id="modal-password"
-                        class="border border-border p-1 w-full font-mono text-sm bg-bg text-fg mb-2"
-                    />
-                    <div
-                        id="modal-password-error"
-                        class="text-xs mb-2 border border-border border-dashed p-1 hidden"
-                    ></div>
-                    <div class="flex gap-2">
-                        <button
-                            id="btn-modal-confirm"
-                            class="border border-border px-2 py-1 hover:bg-fg hover:text-bg cursor-pointer"
-                        >
-                            Confirm
-                        </button>
-                        <button
-                            id="btn-modal-cancel"
-                            class="border border-border px-2 py-1 hover:bg-fg hover:text-bg cursor-pointer"
-                        >
-                            Cancel
-                        </button>
-                    </div>
-                </div>
-            </div>
-
             <!-- ============ RECEIVE ============ -->
             <div id="view-receive" class="view hidden">
                 <button
@@ -947,8 +915,8 @@
                     funds will be unrecoverable without your recovery phrase.
                 </p>
                 <div
-                    id="delete-wallet-error"
-                    class="text-xs min-h-[1.25rem] mb-2"
+                    id="delete-wallet-flash"
+                    class="text-xs text-red-500 mb-2 hidden"
                 ></div>
                 <div class="mb-2">
                     <label class="block mb-1">Password</label>
@@ -1149,7 +1117,7 @@
                 </div>
                 <div
                     id="approve-tx-error"
-                    class="text-xs min-h-[1.25rem] mb-2"
+                    class="text-xs mb-2 border border-border border-dashed p-1 min-h-[1.25rem] hidden"
                 ></div>
                 <div class="flex justify-between">
                     <button
@@ -1215,7 +1183,7 @@
                 </div>
                 <div
                     id="approve-sign-error"
-                    class="text-xs min-h-[1.25rem] mb-2"
+                    class="text-xs mb-2 border border-border border-dashed p-1 min-h-[1.25rem] hidden"
                 ></div>
                 <div class="flex justify-between">
                     <button

src/popup/index.js

@@ -74,6 +74,7 @@ const RESTORABLE_VIEWS = new Set([
     "receive",
     "settings",
     "settings-addtoken",
+    "confirm-tx",
     "transaction",
     "success-tx",
     "error-tx",
@@ -127,6 +128,13 @@ function restoreView() {
         case "settings-addtoken":
             settingsAddToken.show();
             break;
+        case "confirm-tx":
+            if (state.viewData && state.viewData.pendingTx) {
+                confirmTx.restore();
+            } else {
+                fallbackView();
+            }
+            break;
         case "transaction":
             if (state.viewData && state.viewData.tx) {
                 transactionDetail.render();

src/popup/views/addWallet.js

@@ -1,4 +1,4 @@
-const { $, showView, showFlash, showError, hideError } = require("./helpers");
+const { $, showView, showFlash } = require("./helpers");
 const {
     generateMnemonic,
     hdWalletFromMnemonic,
@@ -13,7 +13,6 @@ function show() {
     $("add-wallet-password").value = "";
     $("add-wallet-password-confirm").value = "";
     $("add-wallet-phrase-warning").classList.add("hidden");
-    hideError("add-wallet-error");
     showView("add-wallet");
 }
 
@@ -26,16 +25,14 @@ function init(ctx) {
     $("btn-add-wallet-confirm").addEventListener("click", async () => {
         const mnemonic = $("wallet-mnemonic").value.trim();
         if (!mnemonic) {
-            showError(
-                "add-wallet-error",
+            showFlash(
                 "Enter a recovery phrase or press the die to generate one.",
             );
             return;
         }
         const words = mnemonic.split(/\s+/);
         if (words.length !== 12 && words.length !== 24) {
-            showError(
-                "add-wallet-error",
+            showFlash(
                 "Recovery phrase must be 12 or 24 words. You entered " +
                     words.length +
                     ".",
@@ -43,27 +40,21 @@ function init(ctx) {
             return;
         }
         if (!isValidMnemonic(mnemonic)) {
-            showError(
-                "add-wallet-error",
-                "Invalid recovery phrase. Check for typos.",
-            );
+            showFlash("Invalid recovery phrase. Check for typos.");
             return;
         }
         const pw = $("add-wallet-password").value;
         const pw2 = $("add-wallet-password-confirm").value;
         if (!pw) {
-            showError("add-wallet-error", "Please choose a password.");
+            showFlash("Please choose a password.");
             return;
         }
         if (pw.length < 12) {
-            showError(
-                "add-wallet-error",
-                "Password must be at least 12 characters.",
-            );
+            showFlash("Password must be at least 12 characters.");
             return;
         }
         if (pw !== pw2) {
-            showError("add-wallet-error", "Passwords do not match.");
+            showFlash("Passwords do not match.");
             return;
         }
         const { xpub, firstAddress } = hdWalletFromMnemonic(mnemonic);
@@ -75,8 +66,7 @@ function init(ctx) {
                     firstAddress.toLowerCase(),
         );
         if (duplicate) {
-            showError(
-                "add-wallet-error",
+            showFlash(
                 "This recovery phrase is already added (" +
                     duplicate.name +
                     ").",

src/popup/views/addressDetail.js

@@ -2,8 +2,6 @@ const {
     $,
     showView,
     showFlash,
-    showError,
-    hideError,
     balanceLinesForAddress,
     addressDotHtml,
     addressTitle,
@@ -312,7 +310,8 @@ function init(_ctx) {
         $("export-privkey-address").textContent = addr.address;
         $("export-privkey-address").dataset.full = addr.address;
         $("export-privkey-password").value = "";
-        hideError("export-privkey-error");
+        $("export-privkey-flash").classList.add("hidden");
+        $("export-privkey-flash").textContent = "";
         $("export-privkey-password-section").classList.remove("hidden");
         $("export-privkey-result").classList.add("hidden");
         $("export-privkey-value").textContent = "";
@@ -322,9 +321,13 @@ function init(_ctx) {
     $("btn-export-privkey-confirm").addEventListener("click", async () => {
         const password = $("export-privkey-password").value;
         if (!password) {
-            showError("export-privkey-error", "Password is required.");
+            $("export-privkey-flash").textContent = "Password is required.";
+            $("export-privkey-flash").classList.remove("hidden");
             return;
         }
+        const btn = $("btn-export-privkey-confirm");
+        btn.disabled = true;
+        btn.classList.add("text-muted");
         const wallet = state.wallets[state.selectedWallet];
         try {
             const secret = await decryptWithPassword(
@@ -340,9 +343,13 @@ function init(_ctx) {
             $("export-privkey-password-section").classList.add("hidden");
             $("export-privkey-value").textContent = privateKey;
             $("export-privkey-result").classList.remove("hidden");
-            hideError("export-privkey-error");
+            $("export-privkey-flash").classList.add("hidden");
         } catch {
-            showError("export-privkey-error", "Wrong password.");
+            $("export-privkey-flash").textContent = "Wrong password.";
+            $("export-privkey-flash").classList.remove("hidden");
+        } finally {
+            btn.disabled = false;
+            btn.classList.remove("text-muted");
         }
     });
 

src/popup/views/approval.js

@@ -256,6 +256,9 @@ function showTxApproval(details) {
         $("approve-tx-data-section").classList.add("hidden");
     }
 
+    $("approve-tx-password").value = "";
+    $("approve-tx-error").classList.add("hidden");
+
     showView("approve-tx");
 }
 

src/popup/views/confirmTx.js

@@ -1,6 +1,6 @@
-// Transaction confirmation view + password modal.
-// Shows transaction details, warnings, errors. On proceed, opens
-// password modal, decrypts secret, signs and broadcasts.
+// Transaction confirmation view with inline password.
+// Shows transaction details, warnings, errors. On Sign & Send,
+// reads inline password, decrypts secret, signs and broadcasts.
 
 const {
     parseEther,
@@ -39,6 +39,13 @@ const EXT_ICON =
 
 let pendingTx = null;
 
+function restore() {
+    const d = state.viewData;
+    if (d && d.pendingTx) {
+        show(d.pendingTx);
+    }
+}
+
 function etherscanTokenLink(address) {
     return `https://etherscan.io/token/${address}`;
 }
@@ -226,12 +233,18 @@ function show(txInfo) {
         sendBtn.classList.remove("text-muted");
     }
 
+    // Reset password field and error
+    $("confirm-tx-password").value = "";
+    hideError("confirm-tx-password-error");
+
     // Gas estimate — show placeholder then fetch async
     $("confirm-fee").classList.remove("hidden");
     $("confirm-fee-amount").textContent = "Estimating...";
+    state.viewData = { pendingTx: txInfo };
     showView("confirm-tx");
 
     estimateGas(txInfo);
+    checkRecipientHistory(txInfo);
 }
 
 async function estimateGas(txInfo) {
@@ -274,39 +287,42 @@ async function estimateGas(txInfo) {
     }
 }
 
-function showPasswordModal() {
-    $("modal-password").value = "";
-    hideError("modal-password-error");
-    $("password-modal").classList.remove("hidden");
+async function checkRecipientHistory(txInfo) {
+    try {
+        const provider = getProvider(state.rpcUrl);
+        const txCount = await provider.getTransactionCount(txInfo.to);
+        if (txCount === 0) {
+            const warningsEl = $("confirm-warnings");
+            const warning =
+                `<div class="border border-red-500 border-dashed p-2 mb-1 text-xs font-bold text-red-500">` +
+                `WARNING: The recipient address has ZERO transaction history. ` +
+                `This may indicate a fresh or unused address. Double-check the address before sending.</div>`;
+            if (warningsEl.classList.contains("hidden")) {
+                warningsEl.innerHTML = warning;
+                warningsEl.classList.remove("hidden");
+            } else {
+                warningsEl.innerHTML += warning;
+            }
+        }
+    } catch (e) {
+        log.errorf("recipient history check failed:", e.message);
     }
-
-function hidePasswordModal() {
-    $("password-modal").classList.add("hidden");
 }
 
 function init(ctx) {
-    $("btn-confirm-send").addEventListener("click", () => {
-        showPasswordModal();
-    });
-
-    $("btn-confirm-back").addEventListener("click", () => {
-        showView("send");
-    });
-
-    $("btn-modal-cancel").addEventListener("click", () => {
-        hidePasswordModal();
-    });
-
-    $("btn-modal-confirm").addEventListener("click", async () => {
-        const password = $("modal-password").value;
+    $("btn-confirm-send").addEventListener("click", async () => {
+        const password = $("confirm-tx-password").value;
         if (!password) {
-            showError("modal-password-error", "Please enter your password.");
+            showError(
+                "confirm-tx-password-error",
+                "Please enter your password.",
+            );
             return;
         }
 
         const wallet = state.wallets[state.selectedWallet];
         let decryptedSecret;
-        hideError("modal-password-error");
+        hideError("confirm-tx-password-error");
 
         try {
             decryptedSecret = await decryptWithPassword(
@@ -314,11 +330,12 @@ function init(ctx) {
                 password,
             );
         } catch (e) {
-            showError("modal-password-error", "Wrong password.");
+            showError("confirm-tx-password-error", "Wrong password.");
             return;
         }
 
-        hidePasswordModal();
+        $("btn-confirm-send").disabled = true;
+        $("btn-confirm-send").classList.add("text-muted");
 
         let tx;
         try {
@@ -355,8 +372,15 @@ function init(ctx) {
             decryptedSecret = null;
             const hash = tx ? tx.hash : null;
             txStatus.showError(pendingTx, hash, e.shortMessage || e.message);
+        } finally {
+            $("btn-confirm-send").disabled = false;
+            $("btn-confirm-send").classList.remove("text-muted");
         }
     });
+
+    $("btn-confirm-back").addEventListener("click", () => {
+        showView("send");
+    });
 }
 
-module.exports = { init, show };
+module.exports = { init, show, restore };

src/popup/views/deleteWallet.js

@@ -1,4 +1,4 @@
-const { $, showView, showFlash, showError, hideError } = require("./helpers");
+const { $, showView, showFlash } = require("./helpers");
 const { state, saveState } = require("../../shared/state");
 const { decryptWithPassword } = require("../../shared/vault");
 
@@ -11,7 +11,8 @@ function show(walletIdx) {
     $("delete-wallet-name").textContent =
         wallet.name || "Wallet " + (walletIdx + 1);
     $("delete-wallet-password").value = "";
-    hideError("delete-wallet-error");
+    $("delete-wallet-flash").textContent = "";
+    $("delete-wallet-flash").classList.add("hidden");
     showView("delete-wallet-confirm");
 }
 
@@ -26,18 +27,23 @@ function init(_ctx) {
     $("btn-delete-wallet-confirm").addEventListener("click", async () => {
         const pw = $("delete-wallet-password").value;
         if (!pw) {
-            showError("delete-wallet-error", "Please enter your password.");
+            $("delete-wallet-flash").textContent =
+                "Please enter your password.";
+            $("delete-wallet-flash").classList.remove("hidden");
             return;
         }
 
         if (deleteWalletIndex === null) {
-            showError(
-                "delete-wallet-error",
-                "No wallet selected for deletion.",
-            );
+            $("delete-wallet-flash").textContent =
+                "No wallet selected for deletion.";
+            $("delete-wallet-flash").classList.remove("hidden");
             return;
         }
 
+        const btn = $("btn-delete-wallet-confirm");
+        btn.disabled = true;
+        btn.classList.add("text-muted");
+
         const walletIdx = deleteWalletIndex;
         const wallet = state.wallets[walletIdx];
 
@@ -45,7 +51,10 @@ function init(_ctx) {
         try {
             await decryptWithPassword(wallet.encryptedSecret, pw);
         } catch (_e) {
-            showError("delete-wallet-error", "Wrong password.");
+            $("delete-wallet-flash").textContent = "Wrong password.";
+            $("delete-wallet-flash").classList.remove("hidden");
+            btn.disabled = false;
+            btn.classList.remove("text-muted");
             return;
         }
 

src/popup/views/importKey.js

@@ -1,4 +1,4 @@
-const { $, showView, showError, hideError } = require("./helpers");
+const { $, showView, showFlash } = require("./helpers");
 const { addressFromPrivateKey } = require("../../shared/wallet");
 const { encryptWithPassword } = require("../../shared/vault");
 const { state, saveState } = require("../../shared/state");
@@ -7,7 +7,6 @@ function show() {
     $("import-private-key").value = "";
     $("import-key-password").value = "";
     $("import-key-password-confirm").value = "";
-    hideError("import-key-error");
     showView("import-key");
 }
 
@@ -15,31 +14,28 @@ function init(ctx) {
     $("btn-import-key-confirm").addEventListener("click", async () => {
         const key = $("import-private-key").value.trim();
         if (!key) {
-            showError("import-key-error", "Please enter your private key.");
+            showFlash("Please enter your private key.");
             return;
         }
         let addr;
         try {
             addr = addressFromPrivateKey(key);
         } catch (e) {
-            showError("import-key-error", "Invalid private key.");
+            showFlash("Invalid private key.");
             return;
         }
         const pw = $("import-key-password").value;
         const pw2 = $("import-key-password-confirm").value;
         if (!pw) {
-            showError("import-key-error", "Please choose a password.");
+            showFlash("Please choose a password.");
             return;
         }
         if (pw.length < 12) {
-            showError(
-                "import-key-error",
-                "Password must be at least 12 characters.",
-            );
+            showFlash("Password must be at least 12 characters.");
             return;
         }
         if (pw !== pw2) {
-            showError("import-key-error", "Passwords do not match.");
+            showFlash("Passwords do not match.");
             return;
         }
         const encrypted = await encryptWithPassword(key, pw);