f: Simplify the is_padded test function

Author: shaavan

lightning/src/blinded_path/utils.rs

@@ -233,14 +233,7 @@ impl<T:Writeable> Writeable for BlindedPathWithPadding<T> {
 #[cfg(test)]
 /// Checks if all the packets in the blinded path are properly padded.
 pub fn is_padded(hops: &[BlindedHop], padding_round_off: usize) -> bool {
-	let first_hop = hops.first().expect("BlindedPath must have at least one hop");
-	let first_payload_size = first_hop.encrypted_payload.len();
-
-	// The unencrypted payload data is padded before getting encrypted.
-	// Assuming the first payload is padded properly, get the extra data length.
-	let extra_length = first_payload_size % padding_round_off;
 	hops.iter().all(|hop| {
-		// Check that every packet is padded to the round off length subtracting the extra length.
-		(hop.encrypted_payload.len() - extra_length) % padding_round_off == 0
+		hop.encrypted_payload.len() % padding_round_off == 0
 	})
 }