f: remove writable trait

Author: a-mpch

lightning/src/ln/onion_payment.rs

@@ -22,7 +22,6 @@ use crate::sign::{NodeSigner, Recipient};
 use crate::types::features::BlindedHopFeatures;
 use crate::types::payment::PaymentHash;
 use crate::util::logger::Logger;
-use crate::util::ser::Writeable;
 
 #[allow(unused_imports)]
 use crate::prelude::*;
@@ -80,17 +79,15 @@ fn check_trampoline_onion_constraints(
 	trampoline_amount: u64,
 ) -> Result<(), (LocalHTLCFailureReason, Vec<u8>)> {
 	if outer_hop_data.outgoing_cltv_value < trampoline_cltv_value {
-		let mut err_data = Vec::new();
-		outer_hop_data.outgoing_cltv_value.write(&mut err_data).unwrap();
+		let err_data = outer_hop_data.outgoing_cltv_value.to_be_bytes().to_vec();
 		return Err((LocalHTLCFailureReason::FinalIncorrectCLTVExpiry, err_data));
 	}
 	let outgoing_amount = outer_hop_data
 		.multipath_trampoline_data
 		.as_ref()
 		.map_or(outer_hop_data.amt_to_forward, |mtd| mtd.total_msat);
 	if outgoing_amount < trampoline_amount {
-		let mut err_data = Vec::new();
-		outgoing_amount.write(&mut err_data).unwrap();
+		let err_data = outgoing_amount.to_be_bytes().to_vec();
 		return Err((LocalHTLCFailureReason::FinalIncorrectHTLCAmount, err_data));
 	}