solidity equivalent of mapping in solana, `mapping(address => bool)`

What’s the solidity equivalent to implement a `mapping(address => bool) is_early_sale` in anchor for solana? I figured out the way to go is PDA, but I was only able to figure out how to generate a PDA and create a PDA account. I wanna know how to store in `is_early_sale` and to retrieve it’s value,

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#[derive(Accounts)] #[instruction(user: Pubkey)] pub struct EarlySaleContext { #[account( init, payer = caller, seeds = [user.key().as_ref()], // Use a Pubkey from the vector as the seed bump, space = size_of::() + 16 )] pub set_pda_account: Account, // The PDA account being created #[account(mut)] pub caller: Signer, pub system_program: Program, #[account(mut)] /// CHECK: This account is used to receive SOL. pub program_account: AccountInfo } #[account] pub struct IsEarlySale { pub is_early_sale: bool }#[derive(Accounts)] #[instruction(user: Pubkey)] pub struct EarlySaleContext { #[account( init, payer = caller, seeds = [user.key().as_ref()], // Use a Pubkey from the vector as the seed bump, space = size_of::() + 16 )] pub set_pda_account: Account, // The PDA account being created #[account(mut)] pub caller: Signer, pub system_program: Program, #[account(mut)] /// CHECK: This account is used to receive SOL. pub program_account: AccountInfo } #[account] pub struct IsEarlySale { pub is_early_sale: bool } 

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I will be passing the address of users from a vector