diff --git a/packages/bridge-ui/.default.env b/packages/bridge-ui/.default.env
index 17535bdac75..5213b703d01 100644
--- a/packages/bridge-ui/.default.env
+++ b/packages/bridge-ui/.default.env
@@ -7,3 +7,11 @@ VITE_TEST_ERC20_ADDRESS_MAINNET=""
 VITE_MAINNET_TOKEN_VAULT_ADDRESS=""
 VITE_TAIKO_TOKEN_VAULT_ADDRESS=""
 VITE_TEST_ERC20_ADDRESS_MAINNET=""
+VITE_MAINNET_CHAIN_ID=
+VITE_TAIKO_CHAIN_ID=
+VITE_MAINNET_CHAIN_NAME=
+VITE_TAIKO_CHAIN_NAME=
+VITE_TAIKO_HEADER_SYNC_ADDRESS=
+VITE_MAINNET_HEADER_SYNC_ADDRESS=
+VITE_MAINNET_BRIDGE_ADDRESS=
+VITE_TAIKO_BRIDGE_ADDRESS=
\ No newline at end of file
diff --git a/packages/bridge-ui/src/App.svelte b/packages/bridge-ui/src/App.svelte
index b8e9a6d8c61..e391fc8b33e 100644
--- a/packages/bridge-ui/src/App.svelte
+++ b/packages/bridge-ui/src/App.svelte
@@ -33,6 +33,8 @@
   setupI18n({ withLocale: "en" });
   import {
     chains,
+    CHAIN_ID_MAINNET,
+    CHAIN_ID_TAIKO,
     CHAIN_MAINNET,
     CHAIN_TKO,
     mainnet,
@@ -53,12 +55,17 @@
     number,
     ethers.providers.JsonRpcProvider
   >();
+
+  const p = new ethers.providers.JsonRpcProvider(
+    import.meta.env.VITE_L1_RPC_URL
+  );
+
   providerMap.set(
-    CHAIN_MAINNET.id,
+    CHAIN_ID_MAINNET,
     new ethers.providers.JsonRpcProvider(import.meta.env.VITE_L1_RPC_URL)
   );
   providerMap.set(
-    CHAIN_TKO.id,
+    CHAIN_ID_TAIKO,
     new ethers.providers.JsonRpcProvider(import.meta.env.VITE_L2_RPC_URL)
   );
   providers.set(providerMap);
@@ -122,8 +129,6 @@
     return store;
   });
 
-  // const relayerURL = import.meta.env.VITE_RELAYER_URL;
-
   const storageTransactioner: Transactioner = new StorageService(
     window.localStorage,
     providerMap
diff --git a/packages/bridge-ui/src/domain/chain.ts b/packages/bridge-ui/src/domain/chain.ts
index 46332a7a82e..8bb9f14f8e9 100644
--- a/packages/bridge-ui/src/domain/chain.ts
+++ b/packages/bridge-ui/src/domain/chain.ts
@@ -4,6 +4,14 @@ import type { ComponentType } from "svelte";
 import Eth from "../components/icons/ETH.svelte";
 import Taiko from "../components/icons/TKO.svelte";
 
+export const CHAIN_ID_MAINNET = import.meta.env
+  ? import.meta.env.VITE_MAINNET_CHAIN_ID
+  : 31336;
+
+export const CHAIN_ID_TAIKO = import.meta.env
+  ? import.meta.env.VITE_TAIKO_CHAIN_ID
+  : 167001;
+
 export type Chain = {
   id: number;
   name: string;
@@ -16,34 +24,44 @@ export type Chain = {
 };
 
 export const CHAIN_MAINNET = {
-  id: 31336,
-  name: "Ethereum A1",
+  id: CHAIN_ID_MAINNET,
+  name: import.meta.env
+    ? import.meta.env.VITE_MAINNET_CHAIN_NAME
+    : "Ethereum A1",
   rpc: "https://l1rpc.a1.taiko.xyz",
   enabled: true,
   icon: Eth,
-  bridgeAddress: "0x0237443359aB0b11EcDC41A7aF1C90226a88c70f",
-  headerSyncAddress: "0xa7dF1d30f6456Dc72cE18fE011896105651a1f86",
+  bridgeAddress: import.meta.env
+    ? import.meta.env.VITE_MAINNET_BRIDGE_ADDRESS
+    : "0x3612E284D763f42f5E4CB72B1602b23DAEC3cA60",
+  headerSyncAddress: import.meta.env
+    ? import.meta.env.VITE_MAINNET_HEADER_SYNC_ADDRESS
+    : "0x7B3AF414448ba906f02a1CA307C56c4ADFF27ce7",
   explorerUrl: "https://l1explorer.a1.taiko.xyz",
 };
 
 export const CHAIN_TKO = {
-  id: 167001,
-  name: "Taiko A1",
+  id: CHAIN_ID_TAIKO,
+  name: import.meta.env ? import.meta.env.VITE_TAIKO_CHAIN_NAME : "Taiko A1",
   rpc: "https://l2rpc.a1.taiko.xyz",
   enabled: true,
   icon: Taiko,
-  bridgeAddress: "0x0000777700000000000000000000000000000004",
-  headerSyncAddress: "0x0000777700000000000000000000000000000001",
+  bridgeAddress: import.meta.env
+    ? import.meta.env.VITE_TAIKO_BRIDGE_ADDRESS
+    : "0x0000777700000000000000000000000000000004",
+  headerSyncAddress: import.meta.env
+    ? import.meta.env.VITE_TAIKO_HEADER_SYNC_ADDRESS
+    : "0x0000777700000000000000000000000000000001",
   explorerUrl: "https://l2explorer.a1.taiko.xyz",
 };
 
 export const chains: Record<string, Chain> = {
-  31336: CHAIN_MAINNET,
-  167001: CHAIN_TKO,
+  CHAIN_ID_MAINNET: CHAIN_MAINNET,
+  CHAIN_ID_TAIKO: CHAIN_TKO,
 };
 
 export const mainnet: WagmiChain = {
-  id: 31336,
+  id: CHAIN_ID_MAINNET,
   name: "Ethereum A1",
   network: "",
   nativeCurrency: { name: "Ether", symbol: "ETH", decimals: 18 },
@@ -64,7 +82,7 @@ export const mainnet: WagmiChain = {
 };
 
 export const taiko: WagmiChain = {
-  id: 167001,
+  id: CHAIN_ID_TAIKO,
   name: "Taiko A1",
   network: "",
   nativeCurrency: { name: "Ether", symbol: "ETH", decimals: 18 },
diff --git a/packages/bridge-ui/src/erc20/bridge.ts b/packages/bridge-ui/src/erc20/bridge.ts
index 86aaada459f..696429ced0a 100644
--- a/packages/bridge-ui/src/erc20/bridge.ts
+++ b/packages/bridge-ui/src/erc20/bridge.ts
@@ -151,13 +151,9 @@ class ERC20Bridge implements Bridge {
           chains[opts.message.destChainId.toNumber()].headerSyncAddress,
       });
 
-      return await contract.processMessage(opts.message, proof, {
-        gasLimit: 3500000,
-      });
+      return await contract.processMessage(opts.message, proof);
     } else {
-      return await contract.retryMessage(opts.message, false, {
-        gasLimit: 3500000,
-      });
+      return await contract.retryMessage(opts.message, false);
     }
   }
 }
diff --git a/packages/bridge-ui/src/eth/bridge.ts b/packages/bridge-ui/src/eth/bridge.ts
index e72dd6fb1c5..5d5032b9db8 100644
--- a/packages/bridge-ui/src/eth/bridge.ts
+++ b/packages/bridge-ui/src/eth/bridge.ts
@@ -103,13 +103,9 @@ class ETHBridge implements BridgeInterface {
 
       const proof = await this.prover.GenerateProof(proofOpts);
 
-      return await contract.processMessage(opts.message, proof, {
-        gasLimit: opts.message.gasLimit.add(1000000),
-      });
+      return await contract.processMessage(opts.message, proof);
     } else {
-      return await contract.retryMessage(opts.message, {
-        gasLimit: opts.message.gasLimit.add(1000000),
-      });
+      return await contract.retryMessage(opts.message);
     }
   }
 }