[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › CurrencyCode

```ts
const CurrencyCode: brand(
  "CurrencyCode",
  String,
  (value) =>
    /^[A-Z]{3}$/.test(value)
      ? ok(value)
      : err<CurrencyCodeError>({ type: "CurrencyCode", value }),
);
```

Defined in: [packages/common/src/Type.ts:1146](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Type.ts#L1146)

A three-letter ISO 4217 currency code (e.g., USD, EUR).