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mod proof;
use ring::digest::Algorithm;
use proof::{Proof, Lemma, Positioned};
pub use self::proof::{ProofProto, LemmaProto};
use protobuf::Message;
use protobuf::error::ProtobufResult;
use protobuf::core::parse_from_bytes;
impl<T> Proof<T> {
pub fn from_protobuf(algorithm: &'static Algorithm, proto: ProofProto) -> Option<Self>
where
T: From<Vec<u8>>,
{
proto.into_proof(algorithm)
}
pub fn into_protobuf(self) -> ProofProto
where
T: Into<Vec<u8>>,
{
ProofProto::from_proof(self)
}
pub fn parse_from_bytes(
bytes: &[u8],
algorithm: &'static Algorithm,
) -> ProtobufResult<Option<Self>>
where
T: From<Vec<u8>>,
{
parse_from_bytes::<ProofProto>(bytes).map(|proto| proto.into_proof(algorithm))
}
pub fn write_to_bytes(self) -> ProtobufResult<Vec<u8>>
where
T: Into<Vec<u8>>,
{
self.into_protobuf().write_to_bytes()
}
}
impl ProofProto {
pub fn from_proof<T>(proof: Proof<T>) -> Self
where
T: Into<Vec<u8>>,
{
let mut proto = Self::new();
match proof {
Proof {
root_hash,
lemma,
value,
..
} => {
proto.set_root_hash(root_hash);
proto.set_lemma(LemmaProto::from_lemma(lemma));
proto.set_value(value.into());
}
}
proto
}
pub fn into_proof<T>(mut self, algorithm: &'static Algorithm) -> Option<Proof<T>>
where
T: From<Vec<u8>>,
{
if !self.has_root_hash() || !self.has_lemma() {
return None;
}
self.take_lemma().into_lemma().map(|lemma| {
Proof::new(
algorithm,
self.take_root_hash(),
lemma,
self.take_value().into(),
)
})
}
}
impl LemmaProto {
pub fn from_lemma(lemma: Lemma) -> Self {
let mut proto = Self::new();
match lemma {
Lemma {
node_hash,
sibling_hash,
sub_lemma,
} => {
proto.set_node_hash(node_hash);
if let Some(sub_proto) = sub_lemma.map(|l| Self::from_lemma(*l)) {
proto.set_sub_lemma(sub_proto);
}
match sibling_hash {
Some(Positioned::Left(hash)) => proto.set_left_sibling_hash(hash),
Some(Positioned::Right(hash)) => proto.set_right_sibling_hash(hash),
None => {}
}
}
}
proto
}
pub fn into_lemma(mut self) -> Option<Lemma> {
if !self.has_node_hash() {
return None;
}
let node_hash = self.take_node_hash();
let sibling_hash = if self.has_left_sibling_hash() {
Some(Positioned::Left(self.take_left_sibling_hash()))
} else if self.has_right_sibling_hash() {
Some(Positioned::Right(self.take_right_sibling_hash()))
} else {
None
};
if self.has_sub_lemma() {
self.take_sub_lemma().into_lemma().map(|sub_lemma| {
Lemma {
node_hash: node_hash,
sibling_hash: sibling_hash,
sub_lemma: Some(Box::new(sub_lemma)),
}
})
} else {
Some(Lemma {
node_hash: node_hash,
sibling_hash: sibling_hash,
sub_lemma: None,
})
}
}
}