Function shielded_withdrawal_extra_sighash_data_v0 

pub fn shielded_withdrawal_extra_sighash_data_v0(
    output_script: &[u8],
    unshielding_amount: u64,
    core_fee_per_byte: u32,
    pooling: Pooling,
) -> Vec<u8> 

v0 byte layout of shielded_withdrawal_extra_sighash_data (see that function’s doc comment for the layout and rationale). Frozen: never mutate; a layout change requires a new _v1 + version.