Function create_compressed_reaction_handler 

pub fn create_compressed_reaction_handler<'info>(
    ctx: Context<'_, '_, '_, 'info, CreateCompressedReaction<'info>>,
    to_post: Pubkey,
    reaction_type: String,
    post_root: [u8; 32],
    post_leaf: [u8; 32],
    post_index: u32,
) -> Result<()>