f better const name

Author: TheBlueMatt

lightning/src/routing/scoring.rs

@@ -1059,9 +1059,9 @@ fn success_probability(
 
 			// Because our numerator and denominator max out at 2^-3 we need to multiply them by
 			// quite a large factor to get something useful (ideally in the 2^30 range).
-			const ALMOST_TRILLION: f64 = 1024.0 * 1024.0 * 1024.0 * 2.0;
-			let numerator = (num * ALMOST_TRILLION) as u64 + 1;
-			let denominator = (den * ALMOST_TRILLION) as u64 + 1;
+			const BILLIONISH: f64 = 1024.0 * 1024.0 * 1024.0;
+			let numerator = (num * BILLIONISH) as u64 + 1;
+			let denominator = (den * BILLIONISH) as u64 + 1;
 			debug_assert!(numerator <= 1 << 30, "Got large numerator ({}) from float {}.", numerator, num);
 			debug_assert!(denominator <= 1 << 30, "Got large denominator ({}) from float {}.", denominator, den);
 			(numerator, denominator)
@@ -3026,31 +3026,31 @@ mod tests {
 		let usage = ChannelUsage {
 			effective_capacity: EffectiveCapacity::Total { capacity_msat: 3_950_000_000, htlc_maximum_msat: 1_000 }, ..usage
 		};
-		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 5459);
+		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 5427);
 		let usage = ChannelUsage {
 			effective_capacity: EffectiveCapacity::Total { capacity_msat: 4_950_000_000, htlc_maximum_msat: 1_000 }, ..usage
 		};
-		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4987);
+		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4955);
 		let usage = ChannelUsage {
 			effective_capacity: EffectiveCapacity::Total { capacity_msat: 5_950_000_000, htlc_maximum_msat: 1_000 }, ..usage
 		};
 		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4736);
 		let usage = ChannelUsage {
 			effective_capacity: EffectiveCapacity::Total { capacity_msat: 6_950_000_000, htlc_maximum_msat: 1_000 }, ..usage
 		};
-		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4515);
+		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4484);
 		let usage = ChannelUsage {
 			effective_capacity: EffectiveCapacity::Total { capacity_msat: 7_450_000_000, htlc_maximum_msat: 1_000 }, ..usage
 		};
-		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4515);
+		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4484);
 		let usage = ChannelUsage {
 			effective_capacity: EffectiveCapacity::Total { capacity_msat: 7_950_000_000, htlc_maximum_msat: 1_000 }, ..usage
 		};
-		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4295);
+		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4263);
 		let usage = ChannelUsage {
 			effective_capacity: EffectiveCapacity::Total { capacity_msat: 8_950_000_000, htlc_maximum_msat: 1_000 }, ..usage
 		};
-		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4295);
+		assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage, &params), 4263);
 		let usage = ChannelUsage {
 			effective_capacity: EffectiveCapacity::Total { capacity_msat: 9_950_000_000, htlc_maximum_msat: 1_000 }, ..usage
 		};