Add Zcash[De]Serialize bound to ZkSnarkProof.

zebra-chain/src/proofs.rs

@@ -2,6 +2,8 @@
 
 use std::fmt::Debug;
 
+use crate::serialization::{ZcashDeserialize, ZcashSerialize};
+
 mod bctv14;
 mod groth16;
 
@@ -9,7 +11,10 @@ pub use bctv14::Bctv14Proof;
 pub use groth16::Groth16Proof;
 
 /// A marker trait used to abstract over BCTV14 or Groth16 proofs.
-pub trait ZkSnarkProof: Copy + Clone + Debug + PartialEq + Eq + private::Sealed {}
+pub trait ZkSnarkProof:
+    Copy + Clone + Debug + PartialEq + Eq + ZcashSerialize + ZcashDeserialize + private::Sealed
+{
+}
 impl ZkSnarkProof for Bctv14Proof {}
 impl ZkSnarkProof for Groth16Proof {}
 

zebra-chain/src/proofs/bctv14.rs

@@ -1,4 +1,6 @@
-use std::fmt;
+use std::{fmt, io};
+
+use crate::serialization::{SerializationError, ZcashDeserialize, ZcashSerialize};
 
 /// An encoding of a BCTV14 proof, as used in Zcash.
 pub struct Bctv14Proof(pub [u8; 296]);
@@ -30,3 +32,18 @@ impl PartialEq for Bctv14Proof {
 }
 
 impl Eq for Bctv14Proof {}
+
+impl ZcashSerialize for Bctv14Proof {
+    fn zcash_serialize<W: io::Write>(&self, mut writer: W) -> Result<(), SerializationError> {
+        writer.write_all(&self.0[..])?;
+        Ok(())
+    }
+}
+
+impl ZcashDeserialize for Bctv14Proof {
+    fn zcash_deserialize<R: io::Read>(mut reader: R) -> Result<Self, SerializationError> {
+        let mut bytes = [0; 296];
+        reader.read_exact(&mut bytes[..])?;
+        Ok(Self(bytes))
+    }
+}

zebra-chain/src/proofs/groth16.rs

@@ -1,4 +1,6 @@
-use std::fmt;
+use std::{fmt, io};
+
+use crate::serialization::{SerializationError, ZcashDeserialize, ZcashSerialize};
 
 /// An encoding of a Groth16 proof, as used in Zcash.
 pub struct Groth16Proof(pub [u8; 192]);
@@ -30,3 +32,18 @@ impl PartialEq for Groth16Proof {
 }
 
 impl Eq for Groth16Proof {}
+
+impl ZcashSerialize for Groth16Proof {
+    fn zcash_serialize<W: io::Write>(&self, mut writer: W) -> Result<(), SerializationError> {
+        writer.write_all(&self.0[..])?;
+        Ok(())
+    }
+}
+
+impl ZcashDeserialize for Groth16Proof {
+    fn zcash_deserialize<R: io::Read>(mut reader: R) -> Result<Self, SerializationError> {
+        let mut bytes = [0; 192];
+        reader.read_exact(&mut bytes[..])?;
+        Ok(Self(bytes))
+    }
+}