f Restore expects on writes

Author: tnull

lightning/src/ln/onion_utils.rs

@@ -283,7 +283,7 @@ fn construct_onion_packet_with_init_noise<HD: Writeable, P: Packet>(
 			}
 
 			let mut payload_len = LengthCalculatingWriter(0);
-			payload.write(&mut payload_len).map_err(|_| ())?;
+			payload.write(&mut payload_len).expect("Failed to calculate length");
 			pos += payload_len.0 + 32;
 			assert!(pos <= packet_data.len());
 
@@ -296,7 +296,7 @@ fn construct_onion_packet_with_init_noise<HD: Writeable, P: Packet>(
 	let mut hmac_res = [0; 32];
 	for (i, (payload, keys)) in payloads.iter_mut().zip(onion_keys.iter()).rev().enumerate() {
 		let mut payload_len = LengthCalculatingWriter(0);
-		payload.write(&mut payload_len).map_err(|_| ())?;
+		payload.write(&mut payload_len).expect("Failed to calculate length");
 
 		let packet_data = packet_data.as_mut();
 		shift_slice_right(packet_data, payload_len.0 + 32);