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

```ts
function encodeFlags(buffer: Buffer, flags: readonly boolean[]): void;
```

Defined in: [packages/common/src/Bytes.ts:266](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Bytes.ts#L266)

Encodes an array of boolean flags into a single byte.

Each element in the array corresponds to a bit (0-7). Array can have 0-8
elements.

### Example

```ts

const buffer = createBuffer();
encodeFlags(buffer, [true, false, true]);

assertEqual(buffer.unwrap(), new Uint8Array([0b101]));
```