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

```ts
function createEqRedacted<A>(eq: Eq<A>): Eq<Redacted<A>>;
```

Defined in: [packages/common/src/Redacted.ts:120](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Redacted.ts#L120)

Creates an [Eq](https://evolu.dev/docs/api-reference/common/Eq/type-aliases/Eq) for [Redacted](https://evolu.dev/docs/api-reference/common/Redacted/interfaces/Redacted) values based on an equality function
for the underlying type.

### Example

```ts
type ApiKey = string & Brand<"ApiKey">;
const eqRedactedApiKey = createEqRedacted<ApiKey>(eqString);

const a = createRedacted("x" as ApiKey);
const b = createRedacted("x" as ApiKey);
eqRedactedApiKey(a, b); // true
```