Function load_proof

pub fn load_proof(
    info: &AccountInfo<'_>,
    authority: &Pubkey,
    is_writable: bool,
) -> Result<(), ProgramError>

Errors if:

• Owner is not Marsh program.
• Data is empty.
• Data cannot deserialize into a proof account.
• Proof authority does not match the expected address.
• Expected to be writable, but is not.