[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Crypto](https://evolu.dev/docs/api-reference/common/Crypto) › createSlip21

```ts
function createSlip21(
  seed:
    | (Uint8Array<ArrayBufferLike> & Brand<"Entropy"> & Brand<"Length16">)
    | (Uint8Array<ArrayBufferLike> & Brand<"Entropy"> & Brand<"Length32">)
    | (Uint8Array<ArrayBufferLike> & Brand<"Entropy"> & Brand<"Length64">),
  path: readonly (string | number)[],
): Uint8Array<ArrayBufferLike> & Brand<"Entropy"> & Brand<"Length32">;
```

Defined in: [packages/common/src/Crypto.ts:117](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Crypto.ts#L117)

SLIP21.

https://github.com/satoshilabs/slips/blob/master/slip-0021.md