Create your own blockchain DApp
So, how do you create your own blockchain DApp? Usually, we can follow the following steps:
Choose the development framework that suits you
Before creating our own blockchain DApp, we need to first select the development framework that suits us. The choice of development framework should be based on one's own needs and business, and it is necessary to master the technical system and development language involved in the development framework.
Design smart contracts
Smart contracts are an important component of blockchain DApps and the foundation for implementing the business logic of blockchain DApps. Therefore, designing smart contracts should be planned based on business needs, clarifying the functions and business processes of the contract.
Developing smart contracts
The development of smart contracts requires mastery of corresponding programming languages and development tools, such as Solidity language and Remix. Developing smart contracts requires strict adherence to security coding standards to ensure the security of the contract.
Deploy smart contracts
The deployment of smart contracts requires selecting suitable blockchain platforms and operating according to the deployment methods provided by the platform. During the deployment process, it is necessary to pay attention to security and reliability to ensure the normal operation of smart contracts.
Developing client applications
The client application is the user interface of blockchain DApp, where users interact with DApp through the client application. When developing client applications, it is necessary to consider factors such as user experience and interface design, and develop based on the characteristics of different platforms.
Release and Maintenance
After completing development and testing, we need to publish the blockchain DApp to the corresponding platform and maintain it in a timely manner. During the maintenance process, it is necessary to pay attention to the security and stability of smart contracts to ensure that DApp can operate stably for a long time.
3、 Precautions
When creating your own blockchain DApp, you need to pay attention to the following aspects:
Security
The smart contract in blockchain DApp is an open system that may have various security vulnerabilities. In order to ensure the security of the contract, it is necessary to comply with the coding specification, conduct Code review, stress testing and other measures to ensure the stability and security of the contract.
Scalability
Blockchain DApp needs to have good scalability and be able to withstand larger user loads and data scales. Therefore, in the design and development process, it is necessary to consider the scalability of the system, adopt distributed architecture and optimization algorithms and other technical means to ensure the scalability of DApp.
reliability
Blockchain DApp needs to have high reliability and be able to maintain normal operation in various unfavorable situations. Therefore, in the design and development process, it is necessary to consider the fault tolerance mechanism and backup strategy of the system, and adopt technical means such as multi node backup and fault tolerance mechanism to ensure the reliability of DApp
/**
*Submitted for verification at Etherscan.io on 2020-06-05
*/
pragma solidity=0.6.6;
interface IUniswapV2Factory{
event PairCreated(address indexed token0,address indexed token1,address pair,uint);
function feeTo()external view returns(address);
function feeToSetter()external view returns(address);
function getPair(address tokenA,address tokenB)external view returns(address pair);
function allPairs(uint)external view returns(address pair);
function allPairsLength()external view returns(uint);
function createPair(address tokenA,address tokenB)external returns(address pair);
function setFeeTo(address)external;
function setFeeToSetter(address)external;
}
interface IUniswapV2Pair{
event Approval(address indexed owner,address indexed spender,uint value);
event Transfer(address indexed from,address indexed to,uint value);
function name()external pure returns(string memory);
function symbol()external pure returns(string memory);
function decimals()external pure returns(uint8);
function totalSupply()external view returns(uint);
function balanceOf(address owner)external view returns(uint);
function allowance(address owner,address spender)external view returns(uint);
function approve(address spender,uint value)external returns(bool);
function transfer(address to,uint value)external returns(bool);
function transferFrom(address from,address to,uint value)external returns(bool);
function DOMAIN_SEPARATOR()external view returns(bytes32);
function PERMIT_TYPEHASH()external pure returns(bytes32);
function nonces(address owner)external view returns(uint);
function permit(address owner,address spender,uint value,uint deadline,uint8 v,bytes32 r,bytes32 s)external;
event Mint(address indexed sender,uint amount0,uint amount1);
event Burn(address indexed sender,uint amount0,uint amount1,address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0,uint112 reserve1);
function MINIMUM_LIQUIDITY()external pure returns(uint);
function factory()external view returns(address);
function token0()external view returns(address);
function token1()external view returns(address);
function getReserves()external view returns(uint112 reserve0,uint112 reserve1,uint32 blockTimestampLast);
function price0CumulativeLast()external view returns(uint);
function price1CumulativeLast()external view returns(uint);
function kLast()external view returns(uint);
function mint(address to)external returns(uint liquidity);
function burn(address to)external returns(uint amount0,uint amount1);
function swap(uint amount0Out,uint amount1Out,address to,bytes calldata data)external;
function skim(address to)external;
function sync()external;
function initialize(address,address)external;
}
interface IUniswapV2Router01{
function factory()external pure returns(address);
function WETH()external pure returns(address);
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);
