Additional detail

Author: Conor Okus

lightning/src/chain/chaininterface.rs

@@ -44,9 +44,11 @@ pub trait FeeEstimator {
 	/// Must return a value no smaller than 253 (ie 1 satoshi-per-byte rounded up to ensure later  
 	/// round-downs don't put us below 1 satoshi-per-byte).
 	///
-	/// This converts to:
+	/// This translates to multiplying certain fee rate units by 250 (1 sat/vbyte) 
+	/// e.g 
 	///  * max(satoshis-per-byte * 250, 253)
-	///  * max(satoshis-per-kbyte / 4)
+	///  or
+	///  * max(satoshis-per-kbyte / 4, 253)
 	fn get_est_sat_per_1000_weight(&self, confirmation_target: ConfirmationTarget) -> u32;
 }