Round fee estimates to avoid large fp issues

LN-Zap · Apr 23, 2024 · 73616ca · 73616ca
1 parent 2d73bdc
commit 73616ca
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Showing 2 changed files with 23 additions and 10 deletions.
diff --git a/src/lib/DataProviderManager.ts b/src/lib/DataProviderManager.ts
@@ -82,7 +82,15 @@ export class DataProviderManager {
         try {
           const blockHeight = await p.getBlockHeight();
           const blockHash = await p.getBlockHash();
-          const feeEstimates = await p.getFeeEstimates();
+          let feeEstimates = await p.getFeeEstimates();
+
+          // Parse and round the fee estimates to 3 decimal places
+          feeEstimates = Object.fromEntries(
+            Object.entries(feeEstimates).map(([key, value]) => [
+              key,
+              Math.round((value + Number.EPSILON) * 1000) / 1000,
+            ])
+          );
 
           return {
             provider: p,
@@ -198,8 +206,9 @@ export class DataProviderManager {
       keys.forEach((key) => {
         // Only add the estimate if it has a higher confirmation target and a lower fee.
         if (
-          key > Math.max(...Object.keys(mergedEstimates).map(Number)) &&
-          estimates[key] < Math.min(...Object.values(mergedEstimates))
+          (Object.keys(mergedEstimates).length === 0) ||
+          (key > Math.max(...Object.keys(mergedEstimates).map(Number)) &&
+          estimates[key] < Math.min(...Object.values(mergedEstimates)))
         ) {
           log.debug({
             msg: `Adding estimate from ${providerName} with target ${key} and fee ${estimates[key]} to mergedEstimates`,

diff --git a/test/DataProviderManager-merge.test.ts b/test/DataProviderManager-merge.test.ts
@@ -68,9 +68,11 @@ class MockProvider3 implements Provider {
       "1": 25,
       "2": 15,
       "3": 5,
-      "5": 3,
-      "6": 3,
-      "7": 3,
+      "5": 3.564999999999998,
+      "6": 3.564999999999998,
+      "7": 3.564999999999998,
+      "8": 3.564999999999998,
+      "9": 3.564999999999998,
     });
   getAllData = () =>
     Promise.resolve({
@@ -80,9 +82,11 @@ class MockProvider3 implements Provider {
         "1": 25,
         "2": 15,
         "3": 5,
-        "5": 3,
-        "6": 3,
-        "7": 3,
+        "5": 3.564999999999998,
+        "6": 3.564999999999998,
+        "7": 3.564999999999998,
+        "8": 3.564999999999998,
+        "9": 3.564999999999998,
       },
     });
 }
@@ -109,6 +113,6 @@ test("should merge fee estimates from multiple providers correctly", async () =>
     "1": 60000,
     "2": 40000,
     "3": 10000,
-    "5": 6000,
+    "5": 7130,
   });
 });