feat: add common formatters

libs/shared/utils/src/formatters.ts

@@ -1,2 +1,48 @@
+import { formatUnits } from 'viem';
+
+import type { FormatNumberOptions } from 'react-intl';
+
 export const middleTruncate = (address: string, start = 6, end = 4): string =>
   `${address.slice(0, start)}…${address.slice(-end)}`;
+
+export const valueFormat: FormatNumberOptions = {
+  minimumFractionDigits: 2,
+};
+
+export const currencyFormat: FormatNumberOptions = {
+  style: 'currency',
+  currency: 'USD',
+  minimumFractionDigits: 2,
+};
+
+export const quantityFormat: FormatNumberOptions = {
+  minimumFractionDigits: 0,
+  maximumFractionDigits: 4,
+};
+
+// Format map [value, maxDigits]
+const mappings = [
+  [10000000, 0],
+  [100000, 1],
+  [100, 2],
+  [1, 3],
+  [0.1, 4],
+  [0.0001, 5],
+  [0.000001, 6],
+] as const;
+
+export function formatAmount(amount: bigint, decimals = 18) {
+  if (!amount || amount === 0n) return '0';
+
+  const amt = +formatUnits(amount, decimals);
+
+  for (const [threshold, maxDigits] of mappings) {
+    if (amt >= threshold) {
+      return amt.toLocaleString('en', {
+        maximumFractionDigits: maxDigits,
+      });
+    }
+  }
+
+  return '~ 0';
+}