Function finalize_push_data 

pub fn finalize_push_data(
    instruction_data: &[u8],
) -> Result<(&[u8], &[[u8; 8]]), ProgramError>

The per-push data — each push’s source-buffer bump and the little-endian amount it pays, as parallel slices of equal length in push order — carried by a FinalizeSettle instruction and recovered from its full instruction data alone (discriminator included, as returned by instruction introspection).

This function doesn’t otherwise check that the instruction is consistent with a FinalizeSettle instruction. For example, the discriminator field is ignored.