Struct DiffSerializer 

pub struct DiffSerializer<TradeOff>
where
    TradeOff: AnyTradeOff,
{ /* private fields */ }

All state-mutating function signatures that the code generator produces require this struct to be passed in. It follows the opaque handle pattern, so everything Just Works™. Internally, it’s capturing and serializing the before and after values, allowing the value to be both rolled back and transmitted to clients.

Examples

let diff: &mut DiffSerializer = &mut ctx.diff;
let mut cur_time = ctx.state.get_time();
cur_time -= 1;
ctx.state.set_time(cur_time, diff);