add to signOrder secretHash only if targetChainId exist

src/crypt/signOrder.ts

@@ -55,8 +55,12 @@ export const signOrder = async (
     )),
     nonce,
     expiration,
-    secretHash,
-    targetChainId,
+    ...(targetChainId !== undefined
+      ? {
+        secretHash,
+        targetChainId
+      }
+      : {}),
     buySide: side === 'BUY' ? 1 : 0,
   };
 

src/types.ts

@@ -49,9 +49,9 @@ export type Order = {
   matcherFee: number // uint64
   nonce: number // uint64
   expiration: number // uint64
-  secretHash: string // uint64
   buySide: 0 | 1 // uint8, 1=buy, 0=sell
-  targetChainId: ethers.BigNumberish | undefined // uint64
+  secretHash?: string // uint64
+  targetChainId?: ethers.BigNumberish // uint64
 }
 
 export type LockOrder = {