solsql-program

                Pubkey::find_program_address(&[&table_seed], &program_id);            assert_eq!(                expected_table_pda, *passed_table_pda.key,                "Invalid Table Address."            );            if **passed_table_pda.lamports.borrow() > 0 {                return Ok(());            }             let table_data = borsh::to_vec(&table_metadata)?;            create_pda_account(                payer,                passed_table_pda,                &[&table_seed, &[bump]],                table_data.len(),            )?;             write_to_account(&table_data, passed_table_pda)?;            msg!("Table Created At: {}", passed_table_pda.key);        }        SOLSQLInstruction::InsertIntoTable(data_field) => {            let mut raw_table_data = passed_table_pda.try_borrow_mut_data()?;            let mut table_metadata = TableMetadata::try_from_slice(&raw_table_data)?;

1. Line 37 Pubkey::find_program_address(&[&table_seed], &program_id);: Derives a PDA from seeds and the program ID and returns the address with its canonical bump.
2. Line 50 &[&table_seed, &[bump]],: Uses the bump seed, the extra byte that pushes the derived address off the ed25519 curve.
3. Line 55 msg!("Table Created At: {}", passed_table_pda.key);: Logs to the program log, which is visible in explorers and the test output.

    pda_account: &AccountInfo<'a>,    seeds: &[&[u8]],    space: usize,) -> Result<(), ProgramError> {    let pda_lamports = **pda_account.lamports.borrow();    let pda_owner = *pda_account.owner;     if pda_lamports > 0 {        if pda_owner != PROGRAM_ID {            msg!("PDA already exists but is not owned by this program");            return Err(ProgramError::IllegalOwner);        }        msg!("PDA already exists, skipping creation");        return Ok(());    }    let lamports = rent_exempt_lamports(space)?;    invoke_signed(        &instruction::create_account(            payer.key,            pda_account.key,            lamports,            space as u64,            &PROGRAM_ID,        ),

1. Line 34 msg!("PDA already exists but is not owned by this program");: Logs to the program log, which is visible in explorers and the test output.
2. Line 41 invoke_signed(: Makes a CPI signed by a PDA. The signer seeds prove the program controls that address.