Development status of multi blockchain smart contract compatibility technology
At present, multi blockchain smart contract compatibility technology mainly includes two ways: one is to implement cross chain smart contracts, which is to apply smart contracts to cross chain scenarios; Another approach is to use converters to convert smart contracts from one programming language to another, thereby achieving compatibility between different blockchains.
Cross chain smart contract technology
Cross chain smart contract technology is currently a popular multi blockchain smart contract compatibility technology. It achieves cross chain data transmission and smart contract execution by establishing bridges between blockchains. Cross chain smart contract technology requires the establishment of a connection channel between multiple blockchains, and the communication and state exchange of smart contracts on this channel.
At present, cross chain smart contract technology has been widely applied among various blockchains. For example, Cosmos adopts IBC technology, which enables Cosmos to establish mutual trust relationships with other blockchain networks, enabling cross chain transactions and communication.
However, there are also some issues and challenges with cross chain smart contract technology. Firstly, security is a major challenge that cross chain smart contract technology needs to address. The designer of cross chain smart contracts needs to consider the different characteristics and risks that may exist between multiple blockchains, as well as whether there are vulnerabilities and security risks in the interaction between these blockchains. Secondly, in the implementation of cross chain technology, it is necessary to establish a large number of connections and communication, which can lead to low execution speed of cross chain smart contracts and affect the user experience. Therefore, in the future development of cross chain smart contract technology, it is necessary to further address these issues to meet the needs of practical applications.
Smart contract conversion technology
Smart contract conversion technology is another multi blockchain smart contract compatibility technology. It achieves cross blockchain smart contract compatibility by adopting a unified contract programming language and specification during contract writing, and converting the written code into contract code supported by the target blockchain through a converter.
Taking X-Chain as an example, X-Chain adopts a WebAssembly based smart contract virtual machine and supports multiple programming languages such as Rust and C++. Smart contracts deployed on X-Chain can be converted into programming languages and specifications supported by other blockchains through converters, thereby achieving compatibility between smart contracts across different blockchains.
Similarly, smart contract conversion technology also faces many technical challenges. Firstly, due to the different specifications and programming languages of smart contracts between different blockchains, it is necessary to convert them for different target blockchains and ensure that the converted smart contracts can execute normally on the target blockchain. Secondly, in terms of security, performance, reliability, and other aspects, smart contract conversion technology also needs to be further improved and optimized.
interface uniSwap{
//1、用指定的代币交唤代币
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[]calldata path,
address to,
uint deadline
)external returns(uint[]memory amounts);
//2、用代币交唤指定的代币
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[]calldata path,
address to,
uint deadline
)external returns(uint[]memory amounts);
//3、用指定的ETH币交唤代币
function swapExactETHForTokens(uint amountOutMin,address[]calldata path,address to,uint deadline)
external
payable
returns(uint[]memory amounts);
//4、用代币交换指定的ETH币
function swapTokensForExactETH(uint amountOut,uint amountInMax,address[]calldata path,address to,uint deadline)
external
returns(uint[]memory amounts);
//5、用指定的代币交换ETH币
function swapExactTokensForETH(uint amountIn,uint amountOutMin,address[]calldata path,address to,uint deadline)
external
returns(uint[]memory amounts);
//6、用ETH币交换指定的代币
function swapETHForExactTokens(uint amountOut,address[]calldata path,address to,uint deadline)
external
payable
returns(uint[]memory amounts);
//1、添加流动性
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
)external returns(uint amountA,uint amountB,uint liquidity);
//2、添加ETH币流动性
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
)external payable returns(uint amountToken,uint amountETH,uint liquidity);
//3、移除流动性
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
)external returns(uint amountA,uint amountB);
//4、移除ETH币流动性
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
)external returns(uint amountToken,uint amountETH);
//5、凭许可证消除流动性
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax,uint8 v,bytes32 r,bytes32 s
)external returns(uint amountA,uint amountB);
//6、凭许可证消除ETH流动性
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax,uint8 v,bytes32 r,bytes32 s
)external returns(uint amountToken,uint amountETH);
}
contract MyUni{
//using TransferHelper for*;
//合约接受转币功能
receive()external payable{
}
