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use crate::{
error::Error,
tree::{BranchNode, LeafNode},
H256,
};
pub trait Hasher {
fn write_h256(&mut self, h: &H256);
fn finish(self) -> H256;
}
pub trait Value {
fn to_h256(&self) -> H256;
fn zero() -> Self;
}
impl Value for H256 {
fn to_h256(&self) -> H256 {
*self
}
fn zero() -> Self {
H256::zero()
}
}
pub trait Store<V> {
fn get_branch(&self, node: &H256) -> Result<Option<BranchNode>, Error>;
fn get_leaf(&self, leaf_hash: &H256) -> Result<Option<LeafNode<V>>, Error>;
fn insert_branch(&mut self, node: H256, branch: BranchNode) -> Result<(), Error>;
fn insert_leaf(&mut self, leaf_hash: H256, leaf: LeafNode<V>) -> Result<(), Error>;
fn remove_branch(&mut self, node: &H256) -> Result<(), Error>;
fn remove_leaf(&mut self, leaf_hash: &H256) -> Result<(), Error>;
}