val onCompleted = {result : Boolean ->
    /*Do something*/
}
if (web3?.isWeb3LoadFinished == false) {
    web3?.setup(true,onCompleted)
} else  {
    /*Do something*/
}

val onCompleted = {state : Boolean,address:String, mnemonic:String, privateKey:String, keystore:String,error: String ->
      this.runOnUiThread {
        if (state) {
            val text =
            "address: " + address + "\n\n" +
            "mnemonic: " + mnemonic + "\n\n" +
            "privateKey: " + privateKey + "\n\n" +
            "keystore: " + keystore
            walletDetail?.setText(text)
        } else {
            walletDetail?.setText(error)
        }
      }
}
walletDetail?.setText("generate Accounting.......")
web3?.generateAccount(password,onCompleted = onCompleted)

val onCompleted = {state : Boolean, address: String,privateKey: String,error: String ->
    this.runOnUiThread {
        if (state) {
            val text =
                "address: " + address + "\n\n" +
                "privateKey: " + privateKey
            walletDetailEditText?.setText(text)
        } else {
            walletDetailEditText?.setText(error)
        }
    }
}
walletDetailEditText?.setText("Import Accounting.......")
web3?.importAccountFromKeystore(password,keystore,onCompleted = onCompleted)

val onCompleted = {state : Boolean, address: String,keystore: String,error: String ->
    this.runOnUiThread {
        if (state) {
            val text =
                "address: " + address + "\n\n" +
                "keystore: " + keystore
            walletDetailEditText?.setText(text)
        } else {
            walletDetailEditText?.setText(error)
        }
    }
}
walletDetailEditText?.setText("Import Accounting.......")
web3?.importAccountFromPrivateKey(privateKey,password,onCompleted = onCompleted)

val onCompleted = {state : Boolean, address: String,privateKey: String,keystore: String,error: String ->
    this.runOnUiThread {
        if (state) {
            val text =
                "address: " + address + "\n\n" +
                "privateKey: " + privateKey + "\n\n" +
                "keystore: " + keystore
            walletDetailEditText?.setText(text)
        } else {
            walletDetailEditText?.setText(error)
        }
    }
}
walletDetailEditText?.setText("Import Accounting.......")
web3?.importAccountFromMnemonic(mnemonic,password,onCompleted = onCompleted)

val onCompleted = {state : Boolean, txid: String,error:String ->
    this.runOnUiThread {
        if (state){
            hashValue?.text = txid
        } else {
            hashValue?.text = error
        }
    }
}
web3?.ethTransfer(toAddress,amount,privateKey,onCompleted = onCompleted)

val onCompleted = {state : Boolean, txid: String,error:String ->
    this.runOnUiThread {
        if (state){
            hashValue?.text = txid
        } else {
            hashValue?.text = error
        }
    }
}
web3?.erc20TokenTransfer(
    amount,
    privateKey,
    toAddress,
    decimal= 6.0,
    providerUrl = ETHMainNet,
    erc20ContractAddress = erc20TokenAddress,
    onCompleted = onCompleted)