From cd8e3e2604c4102e7c7f7c2265ce962cfdb008ad Mon Sep 17 00:00:00 2001
From: Mononaut <github@monospace.live>
Date: Sat, 2 Dec 2023 03:08:42 +0000
Subject: [PATCH] Fix liquid fee rounding

---
 backend/src/api/fee-api.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/backend/src/api/fee-api.ts b/backend/src/api/fee-api.ts
index 97dfc29d2..5260e959a 100644
--- a/backend/src/api/fee-api.ts
+++ b/backend/src/api/fee-api.ts
@@ -15,11 +15,12 @@ class FeeApi {
   constructor() { }
 
   defaultFee = Common.isLiquid() ? 0.1 : 1;
+  minimumIncrement = Common.isLiquid() ? 0.1 : 1;
 
   public getRecommendedFee(): RecommendedFees {
     const pBlocks = projectedBlocks.getMempoolBlocks();
     const mPool = mempool.getMempoolInfo();
-    const minimumFee = Math.ceil(mPool.mempoolminfee * 100000);
+    const minimumFee = this.roundUpToNearest(mPool.mempoolminfee * 100000, this.minimumIncrement);
     const defaultMinFee = Math.max(minimumFee, this.defaultFee);
 
     if (!pBlocks.length) {
@@ -58,7 +59,11 @@ class FeeApi {
       const multiplier = (pBlock.blockVSize - 500000) / 500000;
       return Math.max(Math.round(useFee * multiplier), this.defaultFee);
     }
-    return Math.ceil(useFee);
+    return this.roundUpToNearest(useFee, this.minimumIncrement);
+  }
+
+  private roundUpToNearest(value: number, nearest: number): number {
+    return Math.ceil(value / nearest) * nearest;
   }
 }