message: fix exchange error
diff: @@ -1669,7 +1669,7 @@ class Exchange extends PureComponent<any, any> {
  new BigNumber(availableAmount).isGreaterThanOrEqualTo(haveAmount) ||
  fromAddress.type === AddressType.Custom
  - const metamaskNetworkVersion = getCurrentWeb3().currentProvider.networkVersion || false
  + const metamaskNetworkVersion = getCurrentWeb3()?.currentProvider?.networkVersion
  // console.log('metamaskNetworkVersion', metamaskNetworkVersion)
  // let isCorrectMetamaskNetwork = metamask.isConnected() ?
  // (fromAddress.type === AddressType.Metamask || toAddress.type === AddressType.Metamask) &&
  