f add comments to helpers

Author: valentinewallace

lightning/src/blinded_path/payment.rs

@@ -47,18 +47,21 @@ pub enum BlindedPaymentTlvs {
 }
 
 impl BlindedPaymentTlvs {
+	// The fee used to get from the current hop to the next hop in the path.
 	fn fee_base_msat(&self) -> u32 {
 		match self {
 			Self::Forward { payment_relay, .. } => payment_relay.fee_base_msat,
 			_ => 0,
 		}
 	}
+	// The fee used to get from the current hop to the next hop in the path.
 	fn fee_proportional_millionths(&self) -> u32 {
 		match self {
 			Self::Forward { payment_relay, .. } => payment_relay.fee_proportional_millionths,
 			_ => 0,
 		}
 	}
+	// The delta used to get from the current hop to the next hop in the path.
 	fn cltv_expiry_delta(&self) -> u16 {
 		match self {
 			Self::Forward { payment_relay, .. } => payment_relay.cltv_expiry_delta,