1

I have the following struct in my anchor program.

pub struct CustomStruct {
    pub user: Pubkey,
    pub number: u64
}

How would I go about checking for null values / default values for user and number?

I'm assuming for u64, I can check u64 == u64(0) or something similar.

Not sure how to check for null Pubkey.

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2
  • Hmm... what's your larger goal here? Are you trying to determine if an account has already been initialized? If so, you could add a boolean property to your struct and use that as a flag. But more generally, you should only initialize accounts once (in the instruction where you tag them with init). All other instructions can then assume the account is already initialized.
    – Nick Garfield
    Commented Nov 25, 2022 at 20:07
  • got it- yeah boolean could work but I'd prefer to not add additional fields if not needed. the larger goal is that I want the anchor program to have an if else statement if the account is or is not set.
    – AceGravity
    Commented Nov 28, 2022 at 15:39

1 Answer 1

Reset to default
0

If you initialize an account with that structure and don't specify the pubkey, the default value will be "111111111111111111111111111111111", which is the system program.

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