inkpad_support/traits/
frame.rs

1//! frame trait
2use crate::{traits::Cache, types::State};
3use inkpad_std::Rc;
4use core::cell::RefCell;
5
6/// WASM execution frame
7pub trait Frame<Memory: 'static + Clone>: Cache<Memory> {
8    fn active(&self) -> Option<[u8; 32]> {
9        Some(self.frame().last()?.borrow().hash)
10    }
11
12    fn active_set(&self, key: [u8; 32], value: Vec<u8>) -> Option<Vec<u8>> {
13        self.frame()
14            .last()
15            .map(|state| state.borrow_mut().set(key.to_vec(), value))?
16    }
17
18    fn active_get(&self, key: &[u8]) -> Option<Vec<u8>> {
19        self.frame()
20            .last()
21            .map(|state| state.borrow().get(key).map(|v| v.to_vec()))?
22    }
23
24    fn push(&mut self, code_hash: [u8; 32], memory: Memory) {
25        self.frame_mut()
26            .push(Rc::new(RefCell::new(State::new(code_hash, memory))));
27    }
28
29    fn switch(&mut self, code_hash: [u8; 32]) -> Option<()> {
30        let frames = self.frame().clone();
31        self.frame_mut().push(
32            frames
33                .iter()
34                .filter(|v| v.borrow().hash == code_hash)
35                .last()?
36                .clone(),
37        );
38        Some(())
39    }
40
41    fn back(&mut self) -> Option<()> {
42        let frame_mut = self.frame_mut();
43        if frame_mut.len() < 2 {
44            None
45        } else {
46            frame_mut.push(frame_mut[frame_mut.len() - 2].clone());
47            Some(())
48        }
49    }
50
51    fn top(&mut self) -> Option<()> {
52        let frame_mut = self.frame_mut();
53        frame_mut.push(frame_mut[0].clone());
54        Some(())
55    }
56}
inkpad_support/traits/frame.rs

inkpad_support/traits/
frame.rs
