initial

layers/shared/utils/money.ts

@@ -0,0 +1,89 @@
+import Decimal from 'decimal.js'
+
+const CURRENCY_SYMBOL: Record<string, string> = {
+  RUB: '₽',
+  USD: '$',
+  EUR: '€',
+}
+
+const DEFAULT_FORMAT: string = '{amount} {currency}'
+const CURRENCY_FORMAT: Record<string, string> = {
+  USD: '{currency}{amount}',
+  RUB: '{amount}{currency}',
+  EUR: '{currency}{amount}',
+}
+
+const DEFAULT_EXPONENT: number = 2
+const CURRENCY_EXPONENT: Record<string, number> = {
+  BTC: 6,
+  USDT: 2,
+}
+
+function getSymbol(currency: string): string {
+  return CURRENCY_SYMBOL[currency] ?? currency
+}
+
+function getFormat(currency: string): string {
+  return CURRENCY_FORMAT[currency] ?? DEFAULT_FORMAT
+}
+
+function getExponent(currency: string): number {
+  return CURRENCY_EXPONENT[currency] ?? DEFAULT_EXPONENT
+}
+
+function format(value: Decimal.Value, currency: string): string {
+  const exponent = getExponent(currency)
+
+  try {
+    return new Decimal(value).toFixed(exponent)
+  }
+  catch {
+    return new Decimal(0).toFixed(exponent)
+  }
+}
+
+function fullFormat(value: Decimal.Value, currency: string, showCurrency = true, approximately = false): string {
+  let result = ''
+  let decimalValue: Decimal.Instance
+  const exponent = getExponent(currency)
+
+  try {
+    decimalValue = new Decimal(value)
+  }
+  catch {
+    decimalValue = new Decimal(0)
+  }
+
+  value = decimalValue.toFixed(exponent)
+
+  if (approximately && !decimalValue.isZero())
+    result = '~'
+
+  if (showCurrency) {
+    const symbol = getSymbol(currency)
+    const format = getFormat(currency)
+
+    result += format.replace('{amount}', value).replace('{currency}', symbol)
+  }
+  else {
+    result += value
+  }
+
+  return result
+}
+
+function convert(amount: Decimal.Value, rate: Decimal.Value, isTurnRate = true) {
+  if (isTurnRate)
+    return Decimal.mul(amount, rate)
+  else
+    return Decimal.div(amount, rate)
+}
+
+export const $money = {
+  getSymbol,
+  getFormat,
+  getExponent,
+  format,
+  fullFormat,
+  convert,
+}