Fallback function in Solidity

Fallback function execute when another contract call it with unknown function. Below is basic syntax for fallback function. There are two fallback functions, first one is simple and second is payable who can receive ethers. Three ways to call a method from another contract: Example of fallback function: when we transfer ether using fallback then… Continue reading Fallback function in Solidity

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Self Destruct method of Smart Contract in Solidity

Here is the code example how can we destruct a contract. For destruction we have to set the payable address in selfdestruct method where all ethers of contract can be transferred. After destruct a contract all state variables become null, 0 or false, also we can’t update any state variable. e.g.

Circuit Break Pattern in Solidity

In the live contract there are many chances we find an type of error and we have to stop smart contract to handle malicious activity. here is the sample of Circuit Break Pattern.

State Machine Pattern in Solidity

During developing a smart contract sometime we need to manage the different stages and execute and restrict method according to that state/stage of the smart contract.

Owner Based Restriction in solidity

Authentication is very important in any project to control and give limited access to users for this purpose, in solidity we get this functionality with this pattern.