Tokens.py 文件源码

def token_send_from(wallet, args, prompt_passwd=True):
    if len(args) != 4:
        print("please provide a token symbol, from address, to address, and amount")
        return False

    token = get_asset_id(wallet, args[0])
    send_from = args[1]
    send_to = args[2]
    amount = amount_from_string(token, args[3])

    allowance = token_get_allowance(wallet, args[:-1], verbose=False)

    if allowance and allowance >= amount:

        tx, fee, results = token.TransferFrom(wallet, send_from, send_to, amount)

        if tx is not None and results is not None and len(results) > 0:

            if results[0].GetBigInteger() == 1:

                if prompt_passwd:

                    print("\n-----------------------------------------------------------")
                    print("Transfer of %s %s from %s to %s" % (
                        string_from_amount(token, amount), token.symbol, send_from, send_to))
                    print("Transfer fee: %s " % (fee.value / Fixed8.D))
                    print("-------------------------------------------------------------\n")

                    passwd = prompt("[Password]> ", is_password=True)

                    if not wallet.ValidatePassword(passwd):
                        print("incorrect password")
                        return False

                return InvokeContract(wallet, tx, fee)

    print("Requestest transfer from is greater than allowance")

    return False