fix: code review

Author: danielsimao

sdk/src/gateway/layerzero.ts

@@ -334,7 +334,6 @@ export class LayerZeroGatewayClient extends GatewayApiClient {
                 finalFeeSats: baseQuote.finalFeeSats + Number(maxTokensToSwapForLayerZeroFees),
             };
         } else if (fromChain !== 'bitcoin' && toChain === 'bitcoin') {
-            const fromChain = resolveChainName(params.fromChain);
             const dstEid = await this.l0Client.getEidForChain(fromChain);
 
             if (!dstEid) {
@@ -385,7 +384,10 @@ export class LayerZeroGatewayClient extends GatewayApiClient {
                 args: [sendParam, false],
             });
 
-            const gasFee = await this.getL0CreateOrderGasCost(params, sendParam, sendFees, fromChain);
+            const gasFee =
+                fromChain === 'mainnet'
+                    ? 0n
+                    : await this.getL0CreateOrderGasCost(params, sendParam, sendFees, fromChain);
 
             return {
                 type: GatewayOrderType.CrossChainSwap,
@@ -399,8 +401,8 @@ export class LayerZeroGatewayClient extends GatewayApiClient {
                     feeBreakdown: {
                         nativeFee: sendFees.nativeFee,
                         lzTokenFee: sendFees.lzTokenFee,
+                        gasFee: gasFee,
                     },
-                    gasFee: gasFee,
                 },
             };
         }

sdk/src/gateway/types/crosschain-swap.ts

@@ -36,12 +36,12 @@ export type CrossChainSwapQuoteParams<T = {}> = BaseExecuteQuoteParams<T> & {
 export type CrossChainFeeBreakdown = {
     nativeFee: bigint;
     lzTokenFee: bigint;
+    gasFee: bigint;
 };
 
 export interface CrossChainSwapQuote {
     sourceEid: number;
     destinationEid: number;
     oftAddress: Address;
     feeBreakdown: CrossChainFeeBreakdown;
-    gasFee: bigint;
 }