Struct TransferHook 

pub struct TransferHook<'a> {
    pub authority: &'a [u8; 32],
    pub program_id: &'a [u8; 32],
}

Transfer-hook binding extracted from a Token-2022 mint.

Layout of the TransferHook extension value (64 bytes):

  0..32   authority  (Pubkey - may be rotated via SetTransferHook)
 32..64   program_id (Pubkey - the hook program invoked on transfer)

References are borrowed from the mint buffer, so the caller typically clones .to_bytes() into an owned Address before further use. This is R6 audit closure; see [examples/hopper-token-2022-transfer-hook] for the end-to-end reference program.

Fields

authority: &'a [u8; 32]

Authority allowed to update the hook program binding.

program_id: &'a [u8; 32]

Program ID of the hook that Token-2022 invokes on every transfer.