Ethereum: What is the function signature equivalent of a `bytes` object in Solidity, in Vyper?

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Ethereum: What is the equivalent function signature of an Bytes object in Solidity, Vyper?

In this article, we will explore the equivalent function signature for an bytes object on two popular blockchain platforms: Ethereum (Solidity) and Vyper.

What is an Bytes' object in Solidity?

AnBytesobject in Solidity represents a matrix of bytes. In the context of intelligent contracts, it can be used to store data such as images, videos or other binary data.

In Solidity, anBytesobject can be defined using the following syntax:

Solidity

Bytes Memory Data;

This creates an empty Bytes object that can be used to store any type of bytes matrix.

Converting Object Bytes to Vyper

Now, let’s convert this equivalent function to your Vyper counterpart. In Vyper, we use the bytes to represent a matrix of bytes.

`Vyper

FUNCTION FULFILLMENDOMNESS (

uint256 randomness,

Bytes Calldata DataWithround

) Returns (BOOL);

Here is what has changed:

We replaced Solidity’s Bytes' object with Vyper's Bytestype.

We use the keywordCalldatato specify that the function accepts a variable amount of arguments, which are stored in memory. In this case, we are usingDatawithrim, which is an bytes matrix.

The type of return remainsBool, as it was in Solidity.


 Example of use case 
Here is an example of a use case for the Vyper equivalent:

Vyper

CONST UINT256 Randomness = 0x1234567890ABCDEF;

CONST Bytes DataWithrim = B « Hello, World! »;

FUNCTION FULFILLMENDOMNESS (

uint256 randomness,

Bytes Calldata DataWithround

) Returns (Bool) {

// process the data

Return True;

}

In this example, we define a uint256randomness variable and a matrix of bytes’ datawithound`. Then we use these variables in the signing of the equivalent vyper function.

Note that Vyper supports more advanced types and syntax than Solidity, so be aware of other differences between the two platforms.

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