diff --git a/ops_boba/api/watcher-api/serverless-mainnet.yml b/ops_boba/api/watcher-api/serverless-mainnet.yml
index 3800e9320d..17931e431e 100644
--- a/ops_boba/api/watcher-api/serverless-mainnet.yml
+++ b/ops_boba/api/watcher-api/serverless-mainnet.yml
@@ -201,3 +201,20 @@ functions:
           cors: true
     layers:
       - ${file(env-mainnet.yml):LAYERS}
+  watcher_getLayerZeroTransactions:
+    handler: watcher_getLayerZeroTransactions.watcher_getLayerZeroTransactions
+    memorySize: 10240 # optional, in MB, default is 1024
+    timeout: 60 # optional, in seconds, default is 6
+    vpc:
+      securityGroupIds:
+        - ${file(env-mainnet.yml):SECURITY_GROUPS}
+      subnetIds:
+        - ${file(env-mainnet.yml):SUBNET_ID_1}
+        - ${file(env-mainnet.yml):SUBNET_ID_2}
+    events:
+      - http:
+          path: get.layerzero.transactions
+          method: post
+          cors: true
+    layers:
+      - ${file(env-mainnet.yml):LAYERS}
diff --git a/ops_boba/api/watcher-api/watcher_getLayerZeroTransactions.py b/ops_boba/api/watcher-api/watcher_getLayerZeroTransactions.py
index a0a8456947..6c5d14904f 100644
--- a/ops_boba/api/watcher-api/watcher_getLayerZeroTransactions.py
+++ b/ops_boba/api/watcher-api/watcher_getLayerZeroTransactions.py
@@ -3,7 +3,7 @@
 import pymysql
 
 
-def watcher_getLayerZeroTransaction(event, context):
+def watcher_getLayerZeroTransactions(event, context):
     # Parse incoming event
     body = json.loads(event["body"])
     address = body.get("address")
diff --git a/packages/boba/gateway/src/containers/modals/deposit/steps/InputStepMultiChain.js b/packages/boba/gateway/src/containers/modals/deposit/steps/InputStepMultiChain.js
index 457df10f73..5b9bb676ca 100644
--- a/packages/boba/gateway/src/containers/modals/deposit/steps/InputStepMultiChain.js
+++ b/packages/boba/gateway/src/containers/modals/deposit/steps/InputStepMultiChain.js
@@ -22,9 +22,10 @@ import { useTheme } from '@emotion/react'
 import { WrapperActionsModal } from 'components/modal/Modal.styles'
 
 import BN from 'bignumber.js'
+import parse from 'html-react-parser'
 import Select from 'components/select/Select'
-import { selectAltL1DepositCost } from 'selectors/balanceSelector'
-import { fetchAltL1DepositFee } from 'actions/balanceAction'
+import { selectAltL1DepositCost, selectL1FeeBalance } from 'selectors/balanceSelector'
+import { fetchAltL1DepositFee, fetchL1FeeBalance } from 'actions/balanceAction'
 
 import networkService from 'services/networkService'
 
@@ -58,6 +59,7 @@ function InputStepMultiChain({ handleClose, token, isBridge, openTokenPicker })
   const signatureStatus = useSelector(selectSignatureStatus_depositTRAD)
   const lookupPrice = useSelector(selectLookupPrice)
   const depositFees = useSelector(selectAltL1DepositCost)
+  const feeBalance = useSelector(selectL1FeeBalance) //amount of ETH on L1 to pay gas
 
   const maxValue = logAmount(token.balance, token.decimals)
 
@@ -96,6 +98,7 @@ function InputStepMultiChain({ handleClose, token, isBridge, openTokenPicker })
   const isMobile = useMediaQuery(theme.breakpoints.down('md'))
 
   useEffect(() => {
+    dispatch(fetchL1FeeBalance()) //ETH balance for paying gas
     dispatch(fetchAltL1DepositFee())
   },[dispatch])
 
@@ -150,6 +153,16 @@ function InputStepMultiChain({ handleClose, token, isBridge, openTokenPicker })
     }),
   }
 
+  let ETHstring = ''
+  let warning = false
+
+  if (depositFees[altL1Bridge]) {
+    if(Number(depositFees[altL1Bridge].fee) > Number(feeBalance)) {
+      warning = true
+      ETHstring = `WARNING: your L1 ${networkService.L1NativeTokenSymbol} balance of ${Number(feeBalance).toFixed(4)} is not sufficient to cover this transaction.`
+    }
+  }
+
   return (
     <>
       <Box>
@@ -204,6 +217,12 @@ function InputStepMultiChain({ handleClose, token, isBridge, openTokenPicker })
           </Typography>
         )}
 
+        {warning && (
+          <Typography variant="body2" sx={{mt: 2, color: 'red'}}>
+            {parse(ETHstring)}
+          </Typography>
+        )}
+
       </Box>
       <WrapperActionsModal>
         <Button
@@ -222,7 +241,7 @@ function InputStepMultiChain({ handleClose, token, isBridge, openTokenPicker })
           variant="contained"
           loading={depositLoading}
           tooltip={depositLoading ? "Your transaction is still pending. Please wait for confirmation." : "Click here to bridge your funds to alt L1"}
-          disabled={!validValue || !altL1Bridge}
+          disabled={!validValue || !altL1Bridge || warning}
           triggerTime={new Date()}
           fullWidth={isMobile}
         >
diff --git a/packages/boba/gateway/src/services/networkService.js b/packages/boba/gateway/src/services/networkService.js
index 4bc2efe1ba..12cd25e07c 100644
--- a/packages/boba/gateway/src/services/networkService.js
+++ b/packages/boba/gateway/src/services/networkService.js
@@ -119,10 +119,12 @@ const L2GasOracle = '0x420000000000000000000000000000000000000F'
 let supportedAltL1Chains = []
 
 let allAddresses = {}
+let l0AllProtocols = {}
 // preload allAddresses
 if (APP_CHAIN === 'rinkeby') {
   const bobaBridges = layerZeroTestnet.BOBA_Bridges.Testnet;
   const l0Protocols = layerZeroTestnet.Layer_Zero_Protocol.Testnet;
+  l0AllProtocols = layerZeroTestnet.Layer_Zero_Protocol;
   allAddresses = {
     ...addresses_Rinkeby,
     L1LPAddress: addresses_Rinkeby.Proxy__L1LiquidityPool,
@@ -134,6 +136,7 @@ if (APP_CHAIN === 'rinkeby') {
 } else if (APP_CHAIN === 'mainnet') {
   const bobaBridges = layerZeroMainnet.BOBA_Bridges.Mainnet;
   const l0Protocols = layerZeroMainnet.Layer_Zero_Protocol.Mainnet;
+  l0AllProtocols = layerZeroMainnet.Layer_Zero_Protocol;
   allAddresses = {
     ...addresses_Mainnet,
     L1LPAddress: addresses_Mainnet.Proxy__L1LiquidityPool,
@@ -141,7 +144,7 @@ if (APP_CHAIN === 'rinkeby') {
     ...bobaBridges,
     ...l0Protocols
   }
-  supportedAltL1Chains = ['Moonbeam']
+  supportedAltL1Chains = ['Moonbeam','BNB', 'Fantom', 'Avalanche']
 }
 let allTokens = {}
 
@@ -4915,7 +4918,7 @@ class NetworkService {
       const pResponse = supportedAltL1Chains.map(async (type) => {
         let L0_ETH_ENDPOINT = allAddresses.Layer_Zero_Endpoint;
         let ETH_L1_BOBA_ADDRESS = allAddresses.TK_L1BOBA;
-        let L0_CHAIN_ID = allAddresses.Layer_Zero_ChainId;
+        let L0_TARGET_CHAIN_ID = l0AllProtocols[type].Layer_Zero_ChainId;
         let ALT_L1_BOBA_ADDRESS = allAddresses[`Proxy__EthBridgeTo${type}`];
         let PROXY_ETH_L1_BRIDGE_ADDRESS_TO = allAddresses[`${type}_TK_BOBA`];
 
@@ -4950,8 +4953,9 @@ class NetworkService {
         );
 
         console.log(`🆙 loading 💵 FEE for ${type}`);
+        console.log("L0_TARGET_CHAIN_ID: ", L0_TARGET_CHAIN_ID)
         const estimatedFee = await ETHLayzerZeroEndpoint.estimateFees(
-          L0_CHAIN_ID,
+          L0_TARGET_CHAIN_ID,
           Proxy__EthBridge.address,
           payload,
           false,
@@ -4987,6 +4991,7 @@ class NetworkService {
     }
     try {
       let L0_ETH_ENDPOINT = allAddresses.Layer_Zero_Endpoint;
+      let L0_TARGET_CHAIN_ID = l0AllProtocols[type].Layer_Zero_ChainId;
       let ETH_L1_BOBA_ADDRESS = allAddresses.TK_L1BOBA;
       let PROXY_ETH_L1_BRIDGE_ADDRESS_TO = allAddresses[`Proxy__EthBridgeTo${type}`];
       let ALT_L1_BOBA_ADDRESS = allAddresses[`${type}_TK_BOBA`];
@@ -5037,7 +5042,7 @@ class NetworkService {
       );
 
       let estimatedFee = await ETHLayzerZeroEndpoint.estimateFees(
-        allAddresses.Layer_Zero_ChainId,
+        L0_TARGET_CHAIN_ID,
         Proxy__EthBridge.address,
         payload,
         false,