f sec key size constant

Author: TheBlueMatt

lightning/src/util/ser.rs

@@ -19,7 +19,7 @@ use core::cmp;
 
 use bitcoin::secp256k1::Signature;
 use bitcoin::secp256k1::key::{PublicKey, SecretKey};
-use bitcoin::secp256k1::constants::{PUBLIC_KEY_SIZE, COMPACT_SIGNATURE_SIZE};
+use bitcoin::secp256k1::constants::{PUBLIC_KEY_SIZE, SECRET_KEY_SIZE, COMPACT_SIGNATURE_SIZE};
 use bitcoin::blockdata::script::Script;
 use bitcoin::blockdata::transaction::{OutPoint, Transaction, TxOut};
 use bitcoin::consensus;
@@ -589,19 +589,19 @@ impl Readable for PublicKey {
 
 impl Writeable for SecretKey {
 	fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
-		let mut ser = [0; 32];
+		let mut ser = [0; SECRET_KEY_SIZE];
 		ser.copy_from_slice(&self[..]);
 		ser.write(w)
 	}
 	#[inline]
 	fn serialized_length(&self) -> usize {
-		32
+		SECRET_KEY_SIZE
 	}
 }
 
 impl Readable for SecretKey {
 	fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
-		let buf: [u8; 32] = Readable::read(r)?;
+		let buf: [u8; SECRET_KEY_SIZE] = Readable::read(r)?;
 		match SecretKey::from_slice(&buf) {
 			Ok(key) => Ok(key),
 			Err(_) => return Err(DecodeError::InvalidValue),