diff --git a/apps/api/src/app.ts b/apps/api/src/app.ts
index 86c3042..3ab41a1 100644
--- a/apps/api/src/app.ts
+++ b/apps/api/src/app.ts
@@ -10,6 +10,7 @@ import { authMiddleware } from './middleware/auth';
 import { csrfMiddleware } from './middleware/csrf';
 import { globalLimiter, mutateLimiter, sensitiveLimiter, mnemonicRevealLimiter } from './middleware/rate-limit';
 import { errorHandler } from './middleware/error-handler';
+import { generateCsrfToken } from './services/csrf.service';
 import walletRoutes from './routes/wallet.routes';
 import relayProxyRoutes from './routes/relay-proxy.routes';
 import jumperProxyRoutes from './routes/jumper-proxy.routes';
@@ -41,6 +42,7 @@ app.use(
     origin: corsIsWildcard ? '*' : (corsOrigins.length > 0 ? corsOrigins : false),
     // Wildcard incompatible с credentials per browser spec — force false при wildcard.
     credentials: corsIsWildcard ? false : env.cors.allowCredentials,
+    exposedHeaders: ['X-CSRF-Token', 'X-Trace-ID'],
   }),
 );
 app.use(express.json({ limit: '64kb' })); // защита от больших payload-DoS
@@ -65,6 +67,30 @@ app.get('/api/health', async (_req, res) => {
 // ── Глобальный rate limit на /api/* — ДО docs чтобы не было unauthenticated DoS на swagger.json
 app.use('/api', globalLimiter);
 
+app.get('/api/csrf', (_req, res) => {
+  if (!env.vault.csrfPath) {
+    res.json({ success: true, data: { enabled: false, csrfToken: null } });
+    return;
+  }
+
+  try {
+    const { token, maxAgeSec } = generateCsrfToken();
+    const crossSiteCookie = !corsIsWildcard && env.cors.allowCredentials;
+    res.cookie('csrf_token', token, {
+      httpOnly: false,
+      secure: crossSiteCookie,
+      sameSite: crossSiteCookie ? 'none' : 'lax',
+      maxAge: maxAgeSec * 1000,
+      path: '/',
+    });
+    res.setHeader('Cache-Control', 'no-store');
+    res.setHeader('X-CSRF-Token', token);
+    res.json({ success: true, data: { enabled: true, csrfToken: token, maxAgeSec } });
+  } catch (err: any) {
+    res.status(503).json({ success: false, error: err.message || 'CSRF token unavailable' });
+  }
+});
+
 // H1 — Swagger gated. В production требуется basic-auth ИЛИ NODE_ENV != production.
 // JSON endpoint ОБЯЗАТЕЛЬНО до app.use('/api/docs', ...) — иначе swagger-ui-express
 // перехватывает все /api/docs/* и возвращает HTML вместо JSON.
diff --git a/apps/api/src/routes/tron-proxy.routes.ts b/apps/api/src/routes/tron-proxy.routes.ts
index 46b9172..4b5e529 100644
--- a/apps/api/src/routes/tron-proxy.routes.ts
+++ b/apps/api/src/routes/tron-proxy.routes.ts
@@ -209,6 +209,7 @@ const ALLOWED_TRC_FUNCTIONS = new Set<string>([
   'allowance(address,address)',
   'swapExactETHForTokens(uint256,address[],address,uint256)',
   'swapExactTokensForETH(uint256,uint256,address[],address,uint256)',
+  'swapExactTokensForETHSupportingFeeOnTransferTokens(uint256,uint256,address[],address,uint256)',
   'swapNativeWithFee(bytes)',
   'swapTokenWithFee(address,uint256,bytes)',
   'getAmountsOut(uint256,address[])',
diff --git a/apps/api/src/services/csrf.service.ts b/apps/api/src/services/csrf.service.ts
index b0d79a0..f58a58e 100644
--- a/apps/api/src/services/csrf.service.ts
+++ b/apps/api/src/services/csrf.service.ts
@@ -36,6 +36,10 @@ export function isCsrfConfigured(): boolean {
   return current !== null;
 }
 
+function b64urlEncode(buf: Buffer): string {
+  return buf.toString('base64').replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
+}
+
 /**
  * Pre-fetch CSRF config из Vault — НЕ мутирует глобал, возвращает новый объект.
  */
@@ -95,11 +99,38 @@ function decodeTimestamp(encoded: string): number {
   return ts + ITSDANGEROUS_EPOCH;
 }
 
+function encodeTimestamp(unixSeconds: number): string {
+  let ts = unixSeconds - ITSDANGEROUS_EPOCH;
+  const bytes: number[] = [];
+  do {
+    bytes.unshift(ts & 0xff);
+    ts = Math.floor(ts / 256);
+  } while (ts > 0);
+  return b64urlEncode(Buffer.from(bytes));
+}
+
 export interface CsrfVerifyResult {
   valid: boolean;
   reason?: string;
 }
 
+export function generateCsrfToken(): { token: string; maxAgeSec: number } {
+  if (!current) {
+    throw new Error('CSRF secret not loaded');
+  }
+
+  const payload = b64urlEncode(crypto.randomBytes(32));
+  const timestamp = encodeTimestamp(Math.floor(Date.now() / 1000));
+  const payloadTs = `${payload}.${timestamp}`;
+  const derived = deriveKey(current.secret, current.salt, current.digest);
+  const signature = b64urlEncode(crypto.createHmac(current.digest, derived).update(payloadTs).digest());
+
+  return {
+    token: `${payloadTs}.${signature}`,
+    maxAgeSec: current.maxAgeSec,
+  };
+}
+
 export function verifyCsrfToken(token: string): CsrfVerifyResult {
   if (!current) return { valid: false, reason: 'CSRF secret not loaded' };
   if (!token || typeof token !== 'string') return { valid: false, reason: 'Empty token' };
diff --git a/apps/api/src/services/swap-orchestrator.service.ts b/apps/api/src/services/swap-orchestrator.service.ts
index 81a6dd7..ab9adbb 100644
--- a/apps/api/src/services/swap-orchestrator.service.ts
+++ b/apps/api/src/services/swap-orchestrator.service.ts
@@ -526,7 +526,7 @@ const TRX_BASE58_ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrs
 // FeeSwapRouter работает с supporting-fee variant — это уже доказано в production traffic.
 const SEL_APPROVE = '095ea7b3';
 const SEL_SWAP_EXACT_ETH_FOR_TOKENS = 'b6f9de95';
-const SEL_SWAP_EXACT_TOKENS_FOR_ETH = '18cbafe5';
+const SEL_SWAP_EXACT_TOKENS_FOR_ETH_SUPPORTING_FEE = '791ac947';
 const SEL_SWAP_NATIVE_WITH_FEE = '152dad1d';
 const SEL_SWAP_TOKEN_WITH_FEE = 'e8d1f203';
 
@@ -617,8 +617,8 @@ function buildSwapExactETHForTokensCalldata(
          encAddr(to) + encU256(deadline) + pathLen + pathElements;
 }
 
-// function swapExactTokensForETH(uint256 amountIn, uint256 amountOutMin, address[] path, address to, uint256 deadline)
-function buildSwapExactTokensForETHCalldata(
+// function swapExactTokensForETHSupportingFeeOnTransferTokens(uint256 amountIn, uint256 amountOutMin, address[] path, address to, uint256 deadline)
+function buildSwapExactTokensForETHSupportingFeeCalldata(
   amountIn: bigint,
   amountOutMin: bigint,
   path: string[],
@@ -628,7 +628,7 @@ function buildSwapExactTokensForETHCalldata(
   const offsetToPath = encU256(160n); // 5 × 32 bytes
   const pathLen = encU256(BigInt(path.length));
   const pathElements = path.map(encAddr).join('');
-  return SEL_SWAP_EXACT_TOKENS_FOR_ETH + encU256(amountIn) + encU256(amountOutMin) +
+  return SEL_SWAP_EXACT_TOKENS_FOR_ETH_SUPPORTING_FEE + encU256(amountIn) + encU256(amountOutMin) +
          offsetToPath + encAddr(to) + encU256(deadline) + pathLen + pathElements;
 }
 
@@ -936,7 +936,7 @@ export async function quoteTrx(p: QuoteTrxParams): Promise<SwapQuoteRaw> {
  * Поддерживает только TRX↔USDT.
  *
  * TRX → USDT (1 tx): swapNativeWithFee wraps swapExactETHForTokens.
- * USDT → TRX (1-2 tx): optional approve(infinite) + swapTokenWithFee wraps swapExactTokensForETH.
+ * USDT → TRX (1-2 tx): optional approve(infinite) + swapTokenWithFee wraps supporting-fee swapExactTokensForETH.
  *
  * Slippage: если `lockedMinOut` задан → используется. Иначе re-quote on-chain.
  */
@@ -1059,7 +1059,7 @@ export async function executeTrx(
   }
 
   // Step 2: build swapTokenWithFee(USDT, amount, calldata).
-  const sunswapCalldata = buildSwapExactTokensForETHCalldata(
+  const sunswapCalldata = buildSwapExactTokensForETHSupportingFeeCalldata(
     swapAmount, amountOutMin, path, fromTronAddr, deadline,
   );
   const tokenInEnc = encAddr(USDT_CONTRACT);