Lity consists of a dynamically extensible language, LityC, a compiler, and CyberMiles' own virtual machine CVM, all of which exist on the CyberMiles blockchain. As a superset of the Solidity language, Lity is more flexible, better performance and more secure. How could this be?
The LibENI (Ethereum Native Interface Library) dynamic virtual machine extension allows instant addition of local functions on the CVM without the need to stop, upgrade or fork the blockchain. The upcoming Lity rule engine will embed formal business rules into smart contracts, which will greatly improve the efficiency of developers and greatly reduce the possibility of errors. The checker can not only check but also automatically fix common security bugs on smart contracts. Reference website: https://#erc-checker
Let's explore in depth how Lityc (compiler) and CVM make programming safer
Take advantage of better security
For known security issues caused by Ethereum Solidity smart contracts, the CyberMiles team classified and extracted common patterns, and installed checkers for these patterns in the Lity language compiler and CVM. We have taken proactive measures to prevent 95% of smart contract errors, which have caused the loss of Ethereum assets. But they most likely won't happen to CyberMiles at all.
Use the Lity compiler (Lityc) to protect your smart contract
The ERC checker is a tool of the Lity compiler to ensure that smart contracts comply with the ERC standards they want to implement.
In the world of ERC:
ERC20 is the most common token/coin issuance contract standard.
This example shows how the ERC20 checker works
ERC223 is an enhanced version of ERC20, which can prevent the inadvertent transfer of assets to the contract address, which is a common reason for the loss of funds on Ethereum. (One more sentence, in order to be more secure, we recommend that all ERC20 contracts on CyberMiles meet the ERC223 standard.)
This example shows how the ERC 223 checker works
â—‹ERC827 is an enhanced version of ERC20 and ERC223, which makes ERC20 safer and easier to use, while maintaining compatibility with ERC20 tools. Simply put, ERC827 can realize all the functions of ERC20 and ERC827, but compared to the improvements of ERC223, ERC827 has more new ways to play. For example, you can set the scope of receiving tokens through the code. If it is set to only accept transfers of more than 1000 CMT, then transfers below 1000 will not succeed.
This example shows how the ERC 827 checker works
â—‹ERC721 is a smart contract standard used to issue irreplaceable tokens. For example, the popular crypto cat game uses ERC721 contracts.
This example shows how the ERC 721 checker works
â—‹ERC884 is a security token standard used to issue US stock certificates.
This example shows how the ERC 884 checker works
Click to view the video: Lity compiler tools: ERC20, ERC223, ERC827, ERC721, ERC884 checker
(Collection of ERC20, ERC223, ERC827, ERC721, ERC884 checker examples)
Integer overflow is one of the common security issues of Ethereum smart contracts. Lity can take the initiative to eliminate the chance of integer overflow in smart contract code. How can this be done?
The Lity compiler (Lityc) will check if SafetMath is used in integers. If SafeMath is not set in integer operations, the Lity compiler will issue a warning. CVM will detect whether there is an integer overflow problem at runtime, and stop the execution of the contract with the error, instead of letting the contract continue to execute with the integer overflow problem.
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