Struct AccountSchema 

pub struct AccountSchema {
    pub type_name: String,
    pub discriminator: Vec<u8>,
    pub diff_fn: DiffFn,
}

Schema for a single account type — discriminator prefix + diff function.

Fields

type_name: String

Human-readable type name (e.g., “Bank”, “TokenAccount”)

discriminator: Vec<u8>

Discriminator bytes that identify this account type (typically 8 bytes for Anchor)

diff_fn: DiffFn

Diff function: (pre_data, post_data) -> field deltas