Function find_program_address 

pub fn find_program_address(
    seeds: &[&[u8]],
    program_id: &Address,
) -> (Address, u8)

Find a program-derived address and its bump seed.

Iterates bump seeds 255..=0 until a valid PDA is found.

Runs off chain too, with the const SHA-256 and curve check in hopper_native, and returns what the cluster returns, so a PDA check can be exercised in a plain unit test.

Panics

Panics if no viable bump exists (matching upstream Pubkey::find_program_address).