> For the complete documentation index, see [llms.txt](https://near-sdk-js.gitbook.io/near-sdk-js/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://near-sdk-js.gitbook.io/near-sdk-js/utils.md).

# utils

**utils** • **Docs**

***

[near-sdk-js v2.0.0](/near-sdk-js/packages.md) / utils

## utils

### Index

#### Classes

* [TextDecoder](/near-sdk-js/utils/classes/textdecoder.md)
* [TextEncoder](/near-sdk-js/utils/classes/textencoder.md)

#### Interfaces

* [Env](/near-sdk-js/utils/interfaces/env.md)
* [IntoStorageKey](/near-sdk-js/utils/interfaces/intostoragekey.md)

#### Type Aliases

* [Mutable](/near-sdk-js/utils/type-aliases/mutable.md)
* [NearAmount](/near-sdk-js/utils/type-aliases/nearamount.md)
* [PromiseIndex](/near-sdk-js/utils/type-aliases/promiseindex.md)
* [Register](/near-sdk-js/utils/type-aliases/register.md)

#### Variables

* [ERR\_INCONSISTENT\_STATE](/near-sdk-js/utils/variables/err_inconsistent_state.md)
* [ERR\_INDEX\_OUT\_OF\_BOUNDS](/near-sdk-js/utils/variables/err_index_out_of_bounds.md)

#### Functions

* [assert](/near-sdk-js/utils/functions/assert.md)
* [bytes](/near-sdk-js/utils/functions/bytes.md)
* [concat](/near-sdk-js/utils/functions/concat.md)
* [decode](/near-sdk-js/utils/functions/decode.md)
* [decodeObj2class](/near-sdk-js/utils/functions/decodeobj2class.md)
* [deserialize](/near-sdk-js/utils/functions/deserialize.md)
* [encode](/near-sdk-js/utils/functions/encode.md)
* [getValueWithOptions](/near-sdk-js/utils/functions/getvaluewithoptions.md)
* [serialize](/near-sdk-js/utils/functions/serialize.md)
* [serializeValueWithOptions](/near-sdk-js/utils/functions/serializevaluewithoptions.md)
* [str](/near-sdk-js/utils/functions/str.md)
* [validateAccountId](/near-sdk-js/utils/functions/validateaccountid.md)