Merge pull request #13 from bitcoinerlab/new-min-fee-rate

Support fractional minimum fee rate (0.1 sat/vB)

Author: landabaso

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@bitcoinerlab/coinselect",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "author": "Jose-Luis Landabaso",
   "license": "MIT",
   "description": "A TypeScript library for Bitcoin transaction management, based on Bitcoin Descriptors for defining inputs and outputs. It facilitates optimal UTXO selection and transaction size calculation.",

package.json

@@ -5,6 +5,7 @@
 export const DUST_RELAY_FEE_RATE = 3;
 //10 times larger than 2017 peak
 export const MAX_FEE_RATE = 10000;
+export const MIN_FEE_RATE = 0.1;
 
 import type { OutputInstance } from '@bitcoinerlab/descriptors';
 

src/index.ts

@@ -1,4 +1,9 @@
-import { OutputWithValue, MAX_FEE_RATE, DUST_RELAY_FEE_RATE } from './index';
+import {
+  OutputWithValue,
+  MIN_FEE_RATE,
+  MAX_FEE_RATE,
+  DUST_RELAY_FEE_RATE
+} from './index';
 import { vsize } from './vsize';
 import { isDust } from './dust';
 export function validateOutputWithValues(
@@ -14,7 +19,11 @@ export function validateOutputWithValues(
   }
 }
 export function validateFeeRate(feeRate: number) {
-  if (!Number.isFinite(feeRate) || feeRate < 1 || feeRate > MAX_FEE_RATE) {
+  if (
+    !Number.isFinite(feeRate) ||
+    feeRate < MIN_FEE_RATE ||
+    feeRate > MAX_FEE_RATE
+  ) {
     throw new Error(`Fee rate ${feeRate} not supported`);
   }
 }