程式碼範例：如何在發送交易之前獲取交易雜湊

我知道他們可能是網上的例子，但他們並沒有真正解決我的問題。

所以讓我們說我有下面的程式碼：

 this.factoryContract = new ethers.Contract(
   "factoryContractAddress",
   "factoryContractABI",
   signer
 );

 this.factoryContract.createChild()// how can I get transaction hash instead of waiting for it inside the "then(){}" callback?
   .then(()=>{/*do things here**/});
   .catch(()=>{/*do things here**/});

我想我找到了你想要的但不確定。

async function creatChildContract(){
  tx = await this.factoryContract.createChild();
  tx.hash //returns hash of the transaction which user just signed.
}

終於找到了我的問題的答案：

async function creatChildContract(){
   this.factoryContract.createChild()
   .then((log)=>{
       console.log(log.hash);
       // here you can access the transaction hash before it is mined
       // you do not have to wait, once the transaction is confirmed, the hash is available.
   });
   .catch(()=>{/*do things here**/})
})

引用自：https://ethereum.stackexchange.com/questions/109922