Going deeper into Vyper

Let’s take a look at our smart contract:

name: public(bytes[24])

@public
def __init__():
    self.name = "Satoshi Nakamoto"

@public
def change_name(new_name: bytes[24]):
    self.name = new_name

@public
def say_hello() -> bytes[32]:
    return concat("Hello, ", self.name)

Take a look at the first line:

name: public(bytes[24])

The array of bytes is basically a string. The variable called name has a type of array of bytes or string. Its visibility is public. If you want to set it to private, then just omit the public keyword, as follows:

name: bytes[24]

Now, take a look at the next lines:

@public
def __init__():
    self.name = “Satoshi Nakamoto”

If you are coming from a Python background, then you will recognize the Python decorator function. There are four of these in Vyper:

• @public means you can execute this method as...