diff --git a/VERSION.properties b/VERSION.properties
index c6a44b3..cf1bc62 100644
--- a/VERSION.properties
+++ b/VERSION.properties
@@ -1,2 +1,2 @@
-client.version=1.2.18
-server.version=1.2.18
+client.version=1.2.19
+server.version=1.2.19
diff --git a/shine-UI/js/pages/registration-payment-view.js b/shine-UI/js/pages/registration-payment-view.js
index d3b5fbb..9544e8c 100644
--- a/shine-UI/js/pages/registration-payment-view.js
+++ b/shine-UI/js/pages/registration-payment-view.js
@@ -44,9 +44,7 @@ export function render({ navigate }) {
   walletValue.className = 'input';
   walletValue.type = 'text';
   walletValue.value = state.registrationPayment.walletAddress || '';
-  walletValue.addEventListener('input', () => {
-    state.registrationPayment.walletAddress = walletValue.value;
-  });
+  walletValue.readOnly = true;
 
   const walletRow = document.createElement('div');
   walletRow.className = 'inline-input-row';
@@ -83,8 +81,8 @@ export function render({ navigate }) {
   refreshButton.textContent = '↻';
   refreshButton.title = 'Обновить';
 
-  const refreshBalance = async ({ showError = true } = {}) => {
-    const address = String(walletValue.value || '').trim();
+  const refreshBalance = async ({ showError = true, addressOverride = '' } = {}) => {
+    const address = String(addressOverride || walletValue.value || '').trim();
     if (!address) return null;
     refreshButton.disabled = true;
     try {
@@ -107,6 +105,19 @@ export function render({ navigate }) {
     }
   };
 
+  const deriveUserWalletAddress = async () => {
+    const draftPassword = String(state.registrationDraft.password ?? '');
+    if (!draftPassword) {
+      throw new Error('Не найден пароль регистрации для вычисления wallet.key');
+    }
+    const wallet = await deriveWalletFromPassword(draftPassword);
+    const address = String(wallet?.address || '').trim();
+    if (!address) throw new Error('Не удалось вычислить адрес wallet.key');
+    state.registrationPayment.walletAddress = address;
+    walletValue.value = address;
+    return address;
+  };
+
   refreshButton.addEventListener('click', () => {
     void refreshBalance();
   });
@@ -117,9 +128,15 @@ export function render({ navigate }) {
   topupButton.className = 'ghost-btn';
   topupButton.type = 'button';
   topupButton.textContent = 'Пополнить кошелёк';
-  topupButton.addEventListener('click', () => {
-    const walletAddress = String(walletValue.value || '').trim();
-    window.open(getTopupSiteUrl(walletAddress), '_blank', 'noopener,noreferrer');
+  topupButton.addEventListener('click', async () => {
+    try {
+      const walletAddress = await deriveUserWalletAddress();
+      window.open(getTopupSiteUrl(walletAddress), '_blank', 'noopener,noreferrer');
+    } catch (error) {
+      status.className = 'status-line is-unavailable';
+      status.textContent = `Не удалось подготовить кошелёк: ${error?.message || 'unknown'}`;
+      status.style.display = '';
+    }
   });
 
   const submitButton = document.createElement('button');
@@ -141,15 +158,8 @@ export function render({ navigate }) {
       submitButton.disabled = true;
       submitButton.textContent = 'Регистрация...';
 
-      const walletAddress = String(walletValue.value || '').trim();
-      if (!walletAddress) {
-        status.className = 'status-line is-unavailable';
-        status.textContent = 'Кошелёк не подготовлен. Нажмите «Обновить» и попробуйте снова.';
-        status.style.display = '';
-        return;
-      }
-
-      const currentBalance = await refreshBalance({ showError: true });
+      const walletAddress = await deriveUserWalletAddress();
+      const currentBalance = await refreshBalance({ showError: true, addressOverride: walletAddress });
       if (currentBalance == null) return;
       if (currentBalance < MIN_REQUIRED_SOL) {
         status.className = 'status-line is-unavailable';
@@ -205,11 +215,8 @@ export function render({ navigate }) {
 
   (async () => {
     try {
-      const draftPassword = String(state.registrationDraft.password ?? '');
-      const wallet = await deriveWalletFromPassword(draftPassword);
-      state.registrationPayment.walletAddress = wallet.address;
-      walletValue.value = wallet.address;
-      await refreshBalance();
+      const walletAddress = await deriveUserWalletAddress();
+      await refreshBalance({ addressOverride: walletAddress });
     } catch (error) {
       status.className = 'status-line is-unavailable';
       status.textContent = `Не удалось подготовить wallet.key: ${error?.message || 'unknown'}`;