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[rust-lightning] / lightning / src / util / ser.rs

diff --git a/lightning/src/util/ser.rs b/lightning/src/util/ser.rs
index 37fade88835a4089faea83deeb7ff7623e8ca6d0..7c4ba7fd50f99888745a6944971c10f3f00f77a9 100644 (file)
--- a/lightning/src/util/ser.rs
+++ b/lightning/src/util/ser.rs
@@ -22,6 +22,7 @@ use core::ops::Deref;
 use bitcoin::secp256k1::{PublicKey, SecretKey};
 use bitcoin::secp256k1::constants::{PUBLIC_KEY_SIZE, SECRET_KEY_SIZE, COMPACT_SIGNATURE_SIZE};
 use bitcoin::secp256k1::ecdsa::Signature;
+use bitcoin::blockdata::constants::ChainHash;
 use bitcoin::blockdata::script::Script;
 use bitcoin::blockdata::transaction::{OutPoint, Transaction, TxOut};
 use bitcoin::consensus;
@@ -366,8 +367,7 @@ impl Readable for BigSize {
 /// In TLV we occasionally send fields which only consist of, or potentially end with, a
 /// variable-length integer which is simply truncated by skipping high zero bytes. This type
 /// encapsulates such integers implementing Readable/Writeable for them.
-#[cfg_attr(test, derive(PartialEq, Eq))]
-#[derive(Clone, Debug)]
+#[cfg_attr(test, derive(PartialEq, Eq, Debug))]
 pub(crate) struct HighZeroBytesDroppedBigSize<T>(pub T);
 
 macro_rules! impl_writeable_primitive {
@@ -485,7 +485,7 @@ macro_rules! impl_array {
        );
 }
 
-impl_array!(3); // for rgb
+impl_array!(3); // for rgb, ISO 4712 code
 impl_array!(4); // for IPv4
 impl_array!(12); // for OnionV2
 impl_array!(16); // for IPv6
@@ -884,6 +884,19 @@ impl Readable for BlockHash {
        }
 }
 
+impl Writeable for ChainHash {
+       fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
+               w.write_all(self.as_bytes())
+       }
+}
+
+impl Readable for ChainHash {
+       fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
+               let buf: [u8; 32] = Readable::read(r)?;
+               Ok(ChainHash::from(&buf[..]))
+       }
+}
+
 impl Writeable for OutPoint {
        fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
                self.txid.write(w)?;