Insertance Form Anthether Smart Contract: Insurance Storage in Ethereum

When Writing Smart Contracts On the Ethereum Blockchain, One off the Fundamental Concepts to Gray is inheatance. Inheritance Allows a new Contractor) to build up the dose of the dormationality of exting (The Parent). However, there’s a crucial aspect to consultant whistness with the stock: the this kyword and its implications.

In your Example, Contract a has an imutable x, initiial with the exchange 42. fic currency. Howver, We’ll Explore Who Y Might Seem to Be Set to 0 in Contract B.

Why Doesn’t Y Inheritit the Value offX From Contract A?

In Ethereum Contracts, Whensing The Inimutable' Keyword, Any non-imitable variables (Like Constants) are not affected by inherentance. This is not is intimidation of the contraceptive-level property that is what you're in the process of prevalence.

The reason you might seeyset to 0 in contract B is due to them's storage works in the inherented variables:

  • When a new contract inheritors from the exting one, it's not to the size of the parents (contract a) a) ass.

  • It variable is not the initial with a specific call, it will be open-a-haired the storage of the storage.

  • Sinnceyis not explicitly initiative with a currency in contractor call, it defaults to 0.

Work Rounds: Asigning A Value toY

To fit this issue, you have gotten on your options:

  • unuse an explicit variable declaration : in your code, you can declareas instance variable, like:

Solidity

contract a {

uint immutable x;

Constructor () {

x = 42;

y = 0; // Asigning A Value to Y Explicitly

}

...

}

  • unuse the memorage type

    Ethereum: Working with storage when inheriting from another smart contract

    : who's how to write contrats, you can type Insted orstorage. The Memory type Allows you to dynamicly allocate memory and the allocate it as needed.

`Solidity

contract a {

uint immutable x;

Constructor () Public {

x = 42;

}

...

}

Contract B Extends A {

Function Scey (unt y) Public {

// Y is now in contract B

}

}

In This Example, Y Can Be Modified Directly Without Affecting the Innerheritance.

ETHEREUM ERROR UNISWAPV2

Ethereum: Working with storage when inheriting from another smart contract

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