Job Board - Convention over Configuration

Program Code

Directory Structure

• Error Codes
  • All errors in this module
• States
  • All states (PDAs) , each file contain one PDA
• Utils
  • Utility functions
• Instructions
  • A directory of instructions for each state (PDAs) with the related instructions

PDA

Store bump on the PDA to avoid passing it around.

#[account]
#[derive(Default, Debug)]
pub struct Applicant {
    pub wallet: Pubkey,
    pub bump: u8,
    pub name: String,
    pub email: String,
    pub resume_link: String,
    pub contact_via_email: bool,
    pub contact_via_wallet: bool,
}

Store the PDA seed prefix and size as static variables.

Also annotate each size with the origin for easier readability, use std::mem::size_of if possible.

impl Applicant {
    pub const PREFIX: &'static str = "APPLICANT";


    pub const SIZE: usize = 8 + /* discriminator */
        std::mem::size_of::<Pubkey>() + /* wallet */
        std::mem::size_of::<u8>() + /* bump */
        64 + /* name */
        64 + /* email */
        128 + /* resume_link */
        std::mem::size_of::<bool>() + /* contact_via_email */
        std::mem::size_of::<bool>() + /* contact_via_wallet */
        100 /* padding */
    ;
    /* rest of file */
}

Instructions

Taken from apply_to_job_listings .

One instruction per file, with file name, function name, context and arguments all keeping the same name.

#[derive(AnchorSerialize, AnchorDeserialize)]
pub struct ApplyToJobListingArgs {
    pub are_you_sure: bool
}


#[derive(Accounts)]
#[instruction(args: ApplyToJobListingArgs)]
pub struct ApplyToJobListingContext<'info> {
    /* accounts */
}




pub fn apply_to_job_listing(
    ctx: Context<ApplyToJobListingContext>,
    args: ApplyToJobListingArgs,
) -> Result<()> {
    /* function implementation */
}

The seeds taken from the Application::PREFIX and bump from applicant.bump.

Also, try and use constraints like has_one as much a possible to protect against malicious inputs.

    #[account(
    seeds=[Applicant::PREFIX.as_bytes(), &applicant.wallet.to_bytes()],
    has_one=wallet,
    bump=applicant.bump
    )]
    pub applicant: Box<Account<'info, Applicant>>,

Testing

• PDAs
  • All PDA getters in one file.
• Tests
  • At least one test per instruction, easy to make sure proper coverage and easily copy tests to front-end and just replace Keypair signing with wallet signing.