sparse_merkle_tree/
traits.rs

1use crate::{
2    error::Error,
3    tree::{BranchKey, BranchNode},
4    H256,
5};
6
7/// Trait for customize hash function
8pub trait Hasher {
9    fn write_h256(&mut self, h: &H256);
10    fn write_byte(&mut self, b: u8);
11    fn finish(self) -> H256;
12}
13
14/// Trait for define value structures
15pub trait Value {
16    fn to_h256(&self) -> H256;
17    fn zero() -> Self;
18}
19
20impl Value for H256 {
21    fn to_h256(&self) -> H256 {
22        *self
23    }
24    fn zero() -> Self {
25        H256::zero()
26    }
27}
28
29/// Traits for customize backend storage
30pub trait StoreReadOps<V> {
31    fn get_branch(&self, branch_key: &BranchKey) -> Result<Option<BranchNode>, Error>;
32    fn get_leaf(&self, leaf_key: &H256) -> Result<Option<V>, Error>;
33}
34
35pub trait StoreWriteOps<V> {
36    fn insert_branch(&mut self, node_key: BranchKey, branch: BranchNode) -> Result<(), Error>;
37    fn insert_leaf(&mut self, leaf_key: H256, leaf: V) -> Result<(), Error>;
38    fn remove_branch(&mut self, node_key: &BranchKey) -> Result<(), Error>;
39    fn remove_leaf(&mut self, leaf_key: &H256) -> Result<(), Error>;
40}
sparse_merkle_tree/traits.rs

sparse_merkle_tree/
traits.rs
