diff --git a/package.json b/package.json
index 418dffb..8b8a2c5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pool-relayer",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "description": "Relayer for Tornado.cash Nova privacy solution. https://tornado.cash",
   "author": "tornado.cash",
   "license": "MIT",
diff --git a/src/abi/TornadoPool.json b/src/abi/TornadoPool.json
index 1c70139..a917ad9 100644
--- a/src/abi/TornadoPool.json
+++ b/src/abi/TornadoPool.json
@@ -151,6 +151,19 @@
     "stateMutability": "view",
     "type": "function"
   },
+  {
+    "inputs": [],
+    "name": "MIN_EXT_AMOUNT_LIMIT",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
   {
     "inputs": [],
     "name": "ROOT_HISTORY_SIZE",
@@ -604,6 +617,11 @@
             "internalType": "bool",
             "name": "isL1Withdrawal",
             "type": "bool"
+          },
+          {
+            "internalType": "uint256",
+            "name": "l1Fee",
+            "type": "uint256"
           }
         ],
         "internalType": "struct TornadoPool.ExtData",
@@ -759,6 +777,11 @@
             "internalType": "bool",
             "name": "isL1Withdrawal",
             "type": "bool"
+          },
+          {
+            "internalType": "uint256",
+            "name": "l1Fee",
+            "type": "uint256"
           }
         ],
         "internalType": "struct TornadoPool.ExtData",
@@ -901,6 +924,11 @@
             "internalType": "bool",
             "name": "isL1Withdrawal",
             "type": "bool"
+          },
+          {
+            "internalType": "uint256",
+            "name": "l1Fee",
+            "type": "uint256"
           }
         ],
         "internalType": "struct TornadoPool.ExtData",
diff --git a/src/artifacts/TornadoPool.d.ts b/src/artifacts/TornadoPool.d.ts
index 1f9c59b..fbde483 100644
--- a/src/artifacts/TornadoPool.d.ts
+++ b/src/artifacts/TornadoPool.d.ts
@@ -24,6 +24,7 @@ interface TornadoPoolInterface extends ethers.utils.Interface {
     "FIELD_SIZE()": FunctionFragment;
     "MAX_EXT_AMOUNT()": FunctionFragment;
     "MAX_FEE()": FunctionFragment;
+    "MIN_EXT_AMOUNT_LIMIT()": FunctionFragment;
     "ROOT_HISTORY_SIZE()": FunctionFragment;
     "ZERO_VALUE()": FunctionFragment;
     "ambBridge()": FunctionFragment;
@@ -72,6 +73,10 @@ interface TornadoPoolInterface extends ethers.utils.Interface {
     values?: undefined
   ): string;
   encodeFunctionData(functionFragment: "MAX_FEE", values?: undefined): string;
+  encodeFunctionData(
+    functionFragment: "MIN_EXT_AMOUNT_LIMIT",
+    values?: undefined
+  ): string;
   encodeFunctionData(
     functionFragment: "ROOT_HISTORY_SIZE",
     values?: undefined
@@ -169,6 +174,7 @@ interface TornadoPoolInterface extends ethers.utils.Interface {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       }
     ]
   ): string;
@@ -201,6 +207,7 @@ interface TornadoPoolInterface extends ethers.utils.Interface {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       }
     ]
   ): string;
@@ -229,6 +236,7 @@ interface TornadoPoolInterface extends ethers.utils.Interface {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       }
     ]
   ): string;
@@ -258,6 +266,10 @@ interface TornadoPoolInterface extends ethers.utils.Interface {
     data: BytesLike
   ): Result;
   decodeFunctionResult(functionFragment: "MAX_FEE", data: BytesLike): Result;
+  decodeFunctionResult(
+    functionFragment: "MIN_EXT_AMOUNT_LIMIT",
+    data: BytesLike
+  ): Result;
   decodeFunctionResult(
     functionFragment: "ROOT_HISTORY_SIZE",
     data: BytesLike
@@ -414,6 +426,8 @@ export class TornadoPool extends BaseContract {
 
     MAX_FEE(overrides?: CallOverrides): Promise<[BigNumber]>;
 
+    MIN_EXT_AMOUNT_LIMIT(overrides?: CallOverrides): Promise<[BigNumber]>;
+
     ROOT_HISTORY_SIZE(overrides?: CallOverrides): Promise<[number]>;
 
     ZERO_VALUE(overrides?: CallOverrides): Promise<[BigNumber]>;
@@ -514,6 +528,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<ContractTransaction>;
@@ -545,6 +560,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<ContractTransaction>;
@@ -577,6 +593,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<ContractTransaction>;
@@ -606,6 +623,8 @@ export class TornadoPool extends BaseContract {
 
   MAX_FEE(overrides?: CallOverrides): Promise<BigNumber>;
 
+  MIN_EXT_AMOUNT_LIMIT(overrides?: CallOverrides): Promise<BigNumber>;
+
   ROOT_HISTORY_SIZE(overrides?: CallOverrides): Promise<number>;
 
   ZERO_VALUE(overrides?: CallOverrides): Promise<BigNumber>;
@@ -700,6 +719,7 @@ export class TornadoPool extends BaseContract {
       encryptedOutput1: BytesLike;
       encryptedOutput2: BytesLike;
       isL1Withdrawal: boolean;
+      l1Fee: BigNumberish;
     },
     overrides?: Overrides & { from?: string | Promise<string> }
   ): Promise<ContractTransaction>;
@@ -731,6 +751,7 @@ export class TornadoPool extends BaseContract {
       encryptedOutput1: BytesLike;
       encryptedOutput2: BytesLike;
       isL1Withdrawal: boolean;
+      l1Fee: BigNumberish;
     },
     overrides?: Overrides & { from?: string | Promise<string> }
   ): Promise<ContractTransaction>;
@@ -763,6 +784,7 @@ export class TornadoPool extends BaseContract {
       encryptedOutput1: BytesLike;
       encryptedOutput2: BytesLike;
       isL1Withdrawal: boolean;
+      l1Fee: BigNumberish;
     },
     overrides?: Overrides & { from?: string | Promise<string> }
   ): Promise<ContractTransaction>;
@@ -792,6 +814,8 @@ export class TornadoPool extends BaseContract {
 
     MAX_FEE(overrides?: CallOverrides): Promise<BigNumber>;
 
+    MIN_EXT_AMOUNT_LIMIT(overrides?: CallOverrides): Promise<BigNumber>;
+
     ROOT_HISTORY_SIZE(overrides?: CallOverrides): Promise<number>;
 
     ZERO_VALUE(overrides?: CallOverrides): Promise<BigNumber>;
@@ -887,6 +911,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: CallOverrides
     ): Promise<void>;
@@ -918,6 +943,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: CallOverrides
     ): Promise<void>;
@@ -950,6 +976,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: CallOverrides
     ): Promise<void>;
@@ -1000,6 +1027,8 @@ export class TornadoPool extends BaseContract {
 
     MAX_FEE(overrides?: CallOverrides): Promise<BigNumber>;
 
+    MIN_EXT_AMOUNT_LIMIT(overrides?: CallOverrides): Promise<BigNumber>;
+
     ROOT_HISTORY_SIZE(overrides?: CallOverrides): Promise<BigNumber>;
 
     ZERO_VALUE(overrides?: CallOverrides): Promise<BigNumber>;
@@ -1100,6 +1129,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<BigNumber>;
@@ -1131,6 +1161,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<BigNumber>;
@@ -1163,6 +1194,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<BigNumber>;
@@ -1193,6 +1225,10 @@ export class TornadoPool extends BaseContract {
 
     MAX_FEE(overrides?: CallOverrides): Promise<PopulatedTransaction>;
 
+    MIN_EXT_AMOUNT_LIMIT(
+      overrides?: CallOverrides
+    ): Promise<PopulatedTransaction>;
+
     ROOT_HISTORY_SIZE(overrides?: CallOverrides): Promise<PopulatedTransaction>;
 
     ZERO_VALUE(overrides?: CallOverrides): Promise<PopulatedTransaction>;
@@ -1297,6 +1333,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<PopulatedTransaction>;
@@ -1328,6 +1365,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<PopulatedTransaction>;
@@ -1363,6 +1401,7 @@ export class TornadoPool extends BaseContract {
         encryptedOutput1: BytesLike;
         encryptedOutput2: BytesLike;
         isL1Withdrawal: boolean;
+        l1Fee: BigNumberish;
       },
       overrides?: Overrides & { from?: string | Promise<string> }
     ): Promise<PopulatedTransaction>;
diff --git a/src/artifacts/factories/TornadoPool__factory.ts b/src/artifacts/factories/TornadoPool__factory.ts
index 7076df5..89c481d 100644
--- a/src/artifacts/factories/TornadoPool__factory.ts
+++ b/src/artifacts/factories/TornadoPool__factory.ts
@@ -159,6 +159,19 @@ const _abi = [
     stateMutability: "view",
     type: "function",
   },
+  {
+    inputs: [],
+    name: "MIN_EXT_AMOUNT_LIMIT",
+    outputs: [
+      {
+        internalType: "uint256",
+        name: "",
+        type: "uint256",
+      },
+    ],
+    stateMutability: "view",
+    type: "function",
+  },
   {
     inputs: [],
     name: "ROOT_HISTORY_SIZE",
@@ -613,6 +626,11 @@ const _abi = [
             name: "isL1Withdrawal",
             type: "bool",
           },
+          {
+            internalType: "uint256",
+            name: "l1Fee",
+            type: "uint256",
+          },
         ],
         internalType: "struct TornadoPool.ExtData",
         name: "_extData",
@@ -768,6 +786,11 @@ const _abi = [
             name: "isL1Withdrawal",
             type: "bool",
           },
+          {
+            internalType: "uint256",
+            name: "l1Fee",
+            type: "uint256",
+          },
         ],
         internalType: "struct TornadoPool.ExtData",
         name: "_extData",
@@ -910,6 +933,11 @@ const _abi = [
             name: "isL1Withdrawal",
             type: "bool",
           },
+          {
+            internalType: "uint256",
+            name: "l1Fee",
+            type: "uint256",
+          },
         ],
         internalType: "struct TornadoPool.ExtData",
         name: "_extData",
diff --git a/src/modules/api/api.validator.ts b/src/modules/api/api.validator.ts
index e056d62..388c95b 100644
--- a/src/modules/api/api.validator.ts
+++ b/src/modules/api/api.validator.ts
@@ -37,6 +37,7 @@ const transactionSchema = {
         recipient: addressType,
         relayer: addressType,
         isL1Withdrawal: booleanType,
+        l1Fee: bytes32Type,
       },
     },
     args: {