Add some TryFrom implementations (#1060)

core/src/peer_id.rs

@@ -22,7 +22,7 @@ use crate::PublicKey;
 use bs58;
 use quick_error::quick_error;
 use multihash;
-use std::{fmt, str::FromStr};
+use std::{convert::TryFrom, fmt, str::FromStr};
 
 /// Identifier of a peer of the network.
 ///
@@ -143,6 +143,22 @@ impl From<PublicKey> for PeerId {
     }
 }
 
+impl TryFrom<Vec<u8>> for PeerId {
+    type Error = Vec<u8>;
+
+    fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
+        PeerId::from_bytes(value)
+    }
+}
+
+impl TryFrom<multihash::Multihash> for PeerId {
+    type Error = multihash::Multihash;
+
+    fn try_from(value: multihash::Multihash) -> Result<Self, Self::Error> {
+        PeerId::from_multihash(value)
+    }
+}
+
 impl PartialEq<multihash::Multihash> for PeerId {
     #[inline]
     fn eq(&self, other: &multihash::Multihash) -> bool {

misc/multihash/src/lib.rs

@@ -9,7 +9,7 @@ mod errors;
 mod hashes;
 
 use sha2::Digest;
-use std::fmt::Write;
+use std::{convert::TryFrom, fmt::Write};
 use unsigned_varint::{decode, encode};
 
 pub use self::errors::{DecodeError, DecodeOwnedError, EncodeError};
@@ -165,6 +165,14 @@ impl<'a> PartialEq<MultihashRef<'a>> for Multihash {
     }
 }
 
+impl TryFrom<Vec<u8>> for Multihash {
+    type Error = DecodeOwnedError;
+
+    fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
+        Multihash::from_bytes(value)
+    }
+}
+
 /// Represents a valid multihash.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub struct MultihashRef<'a> {