用戶更改帳戶時余額不更新

Question

每次在metamask中更改帳戶時，我都會嘗試更新地址和余額，但是只有帳戶在更改並且余額沒有得到更新。

async componentDidMount(){
    let accs = await web3.eth.getAccounts();
    let balance = await web3.eth.getBalance(accs[0]);
    let balanceth = await web3.utils.fromWei(balance,'ether');
    console.log(balanceth+" ether");
    this.setState({ balanceth });
    this.setState({ account:accs[0] });
      window.ethereum.on('accountsChanged',  (accounts) => {

          console.log(accounts[0]);
          this.setState({ account:accounts[0] });
          let acc = this.state.account;
          // Time to reload your interface with accounts[0]!
          web3.eth.getBalance(acc,(err,bal)=> {balance = bal})
          console.log(balance)
          web3.utils.fromWei(balance,'ether',(err,bal)=>{balanceth = bal});
          console.log(acc,balanceth);
          this.setState({ balanceth:balanceth });
  })
  }

Answer 1

我認為問題在於試圖改變 function 內部的平衡。 所以你並沒有真正改變你已經定義的余額值。 嘗試：

web3.eth.getBalance(acc,(err,bal)=> {
    this.setState({ balance: bal })
})