Fix bug where number smaller than 100 SAT would displayed in exponent…

src/helper.js

@@ -82,7 +82,11 @@ export const toAmount = (satoshis, unit) => {
   if (!Number.isInteger(satoshis) || !UNITS[unit]) {
     throw new Error('Invalid input!');
   }
-  return (satoshis / UNITS[unit].denominator).toString();
+  const num = satoshis / UNITS[unit].denominator;
+  return num.toLocaleString('en-US', {
+    useGrouping: false,
+    maximumFractionDigits: 8,
+  });
 };
 
 /**

test/unit/helper.spec.js

@@ -275,6 +275,26 @@ describe('Helpers Unit Tests', () => {
       const num = helpers.toAmount(0, 'btc');
       expect(num, 'to equal', '0');
     });
+
+    it('should work for 1', () => {
+      const num = helpers.toAmount(1, 'btc');
+      expect(num, 'to equal', '0.00000001');
+    });
+
+    it('should work for 10', () => {
+      const num = helpers.toAmount(10, 'btc');
+      expect(num, 'to equal', '0.0000001');
+    });
+
+    it('should work for 100', () => {
+      const num = helpers.toAmount(100, 'btc');
+      expect(num, 'to equal', '0.000001');
+    });
+
+    it('should work for 1000', () => {
+      const num = helpers.toAmount(1000, 'btc');
+      expect(num, 'to equal', '0.00001');
+    });
   });
 
   describe('calculateExchangeRate()', () => {