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/views/approval.js

@@ -172,8 +172,6 @@ function showTxApproval(details) {
     // If this is an ERC-20 call, try to extract the real recipient and amount
     const decoded = decodeCalldata(details.txParams.data, toAddr || "");
     if (decoded && decoded.details) {
-        let decodedTokenAddr = null;
-        let decodedTokenSymbol = null;
         for (const d of decoded.details) {
             if (d.label === "Recipient" && d.address) {
                 pendingTxDetails.to = d.address;
@@ -181,20 +179,10 @@ function showTxApproval(details) {
             if (d.label === "Amount") {
                 pendingTxDetails.amount = d.rawValue || d.value;
             }
-            if (d.label === "Token In" && d.isToken && d.address) {
-                const t = TOKEN_BY_ADDRESS.get(d.address.toLowerCase());
-                if (t) {
-                    decodedTokenAddr = d.address;
-                    decodedTokenSymbol = t.symbol;
-                }
-            }
         }
         if (token) {
             pendingTxDetails.token = toAddr;
             pendingTxDetails.tokenSymbol = token.symbol;
-        } else if (decodedTokenAddr) {
-            pendingTxDetails.token = decodedTokenAddr;
-            pendingTxDetails.tokenSymbol = decodedTokenSymbol;
         }
     }
 

src/popup/views/confirmTx.js

@@ -25,7 +25,6 @@ const { decryptWithPassword } = require("../../shared/vault");
 const { formatUsd, getPrice } = require("../../shared/prices");
 const { getProvider } = require("../../shared/balances");
 const { isScamAddress } = require("../../shared/scamlist");
-const { hasTransactionHistory } = require("../../shared/transactions");
 const { ERC20_ABI } = require("../../shared/constants");
 const { log } = require("../../shared/log");
 const makeBlockie = require("ethereum-blockies-base64");
@@ -290,23 +289,20 @@ async function estimateGas(txInfo) {
 
 async function checkRecipientHistory(txInfo) {
     try {
-        const hasHistory = await hasTransactionHistory(
-            txInfo.to,
-            state.blockscoutUrl,
-        );
-        if (hasHistory === false) {
+        const provider = getProvider(state.rpcUrl);
+        const txCount = await provider.getTransactionCount(txInfo.to);
+        if (txCount === 0) {
             const warningsEl = $("confirm-warnings");
-            const warningDiv = document.createElement("div");
-            warningDiv.className =
-                "border border-dashed p-2 mb-1 text-xs font-bold";
-            warningDiv.style.color = "#dc2626";
-            warningDiv.style.borderColor = "#dc2626";
-            warningDiv.textContent =
-                "WARNING: This address has ZERO transaction history on-chain. " +
-                "It has never sent or received any transactions. " +
-                "Double-check the address before sending.";
-            warningsEl.appendChild(warningDiv);
+            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);

src/popup/views/txStatus.js

@@ -43,11 +43,10 @@ function toAddressHtml(address) {
     if (title) {
         return (
             `<div class="flex items-center font-bold">${dot}${escapeHtml(title)}</div>` +
-            `<div class="break-all underline decoration-dashed cursor-pointer" data-copy="${escapeHtml(address)}">${escapeHtml(address)}</div>` +
-            extLink
+            `<div class="break-all">${escapeHtml(address)}${extLink}</div>`
         );
     }
-    return `<div class="flex items-center">${dot}<span class="break-all underline decoration-dashed cursor-pointer" data-copy="${escapeHtml(address)}">${escapeHtml(address)}</span>${extLink}</div>`;
+    return `<div class="flex items-center">${dot}<span class="break-all">${escapeHtml(address)}</span>${extLink}</div>`;
 }
 
 function txHashHtml(hash) {
@@ -140,7 +139,7 @@ function etherscanTokenLink(address) {
 
 function decodedDetailsHtml(decoded) {
     if (!decoded || !decoded.details) return "";
-    let html = `<div class="border border-border border-dashed p-2 mb-3">`;
+    let html = "";
     if (decoded.name) {
         html += `<div class="mb-2"><div class="text-xs text-muted mb-1">Action</div>`;
         html += `<div class="font-bold">${escapeHtml(decoded.name)}</div></div>`;
@@ -165,36 +164,20 @@ function decodedDetailsHtml(decoded) {
         }
         html += `</div>`;
     }
-    html += `</div>`;
     return html;
 }
 
 function renderSuccess() {
     const d = state.viewData;
     if (!d || !d.hash) return;
-
-    const hasDecoded = d.decoded && d.decoded.details;
-
-    // When decoded details are present, the Amount and To are already
-    // shown inside the decoded well — hide the top-level duplicates.
-    const summarySection = $("success-tx-summary").parentElement;
-    const toSection = $("success-tx-to").parentElement;
-    if (hasDecoded) {
-        summarySection.classList.add("hidden");
-        toSection.classList.add("hidden");
-    } else {
-        summarySection.classList.remove("hidden");
-        toSection.classList.remove("hidden");
     $("success-tx-summary").textContent = d.amount + " " + d.symbol;
     $("success-tx-to").innerHTML = toAddressHtml(d.to);
-    }
-
     $("success-tx-block").textContent = String(d.blockNumber);
     $("success-tx-hash").innerHTML = txHashHtml(d.hash);
 
     // Show decoded calldata details if present
     const decodedEl = $("success-tx-decoded");
-    if (decodedEl && hasDecoded) {
+    if (decodedEl && d.decoded) {
         decodedEl.innerHTML = decodedDetailsHtml(d.decoded);
         decodedEl.classList.remove("hidden");
     } else if (decodedEl) {

src/shared/transactions.js

@@ -251,36 +251,4 @@ function filterTransactions(txs, filters = {}) {
     return { transactions: filtered, newFraudContracts: newFraud };
 }
 
-async function hasTransactionHistory(address, blockscoutUrl) {
-    try {
-        const resp = await debugFetch(blockscoutUrl + "/addresses/" + address);
-        if (!resp.ok) {
-            // If Blockscout returns 404, the address has never been seen on-chain.
-            if (resp.status === 404) return false;
-            log.errorf(
-                "blockscout address check:",
-                resp.status,
-                resp.statusText,
-            );
-            return null; // unknown
-        }
-        const data = await resp.json();
-        // Blockscout v2 address endpoint returns tx counts.
-        // An address with no history may still exist (e.g. received ETH once
-        // but shows 0 outgoing). We check both transactions_count and
-        // token_transfers_count to be thorough.
-        const txCount =
-            (parseInt(data.transactions_count, 10) || 0) +
-            (parseInt(data.token_transfers_count, 10) || 0);
-        return txCount > 0;
-    } catch (e) {
-        log.errorf("hasTransactionHistory error:", e.message);
-        return null; // unknown, don't block the user
-    }
-}
-
-module.exports = {
-    fetchRecentTransactions,
-    filterTransactions,
-    hasTransactionHistory,
-};
+module.exports = { fetchRecentTransactions, filterTransactions };

src/shared/uniswap.js

@@ -445,18 +445,12 @@ function decode(data, toAddress) {
             const maxUint160 = BigInt(
                 "0xffffffffffffffffffffffffffffffffffffffff",
             );
-            const isUnlimited = inputAmount >= maxUint160;
-            const amountRaw = isUnlimited
+            const amountStr =
+                inputAmount >= maxUint160
                     ? "Unlimited"
-                : formatAmount(inputAmount, inInfo.decimals);
-            const amountStr = isUnlimited
-                ? "Unlimited"
-                : amountRaw + (inSymbol ? " " + inSymbol : "");
-            details.push({
-                label: "Amount",
-                value: amountStr,
-                rawValue: amountRaw,
-            });
+                    : formatAmount(inputAmount, inInfo.decimals) +
+                      (inSymbol ? " " + inSymbol : "");
+            details.push({ label: "Amount", value: amountStr });
         }
 
         if (outSymbol) {