LEVEL 4

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Now is where we come to the interesting part of our smart contract! Stay put!!

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Now you need to start creating your entrypoints to perform various functionalities.

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Let us write our very first entrypoint called "name_check"

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What are we doing in this entrypoint?

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We will restrict the name of the Superhero to be created to 4 options - Thor, Hulk, Ironman and Captain America.

How can we do this? We will write a simple "if" condition to check if the name sent to this function is equivalent(==) to any of the above four names. If yes, we will return true, if not, we will return false.​

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Why do we need this function?

Because we want to learn how to write constraints in our smart contract.

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Here is some example boilerplate code:

public entrypoint check_name_example(param_name: string) : bool =

if(param_name == "Write 4 values one by one using OR operator(||) " )

    true

else

    false

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There are 2 main pointers to note here:

1. The way to pass an argument to a function is: name_of_the_argument : type_of_argument

2. If you want to return a value from your function, you need to mention it like:

function_name(argument_list): return_type

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Let us now write our entrypoint titled "name_check"