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# @polkadot/primitives

Base [flow](https://flow.org/) definitions for the base Polkadot types as defined in the [specification](https://github.com/w3f/polkadot-spec). It is useful for implementations, applications and libraries, where type-checking of the JavaScript base types is of importance.

## Usage

Installation -

```
npm install --save @polkadot/primitives
```

Usage -

```js
// @flow

import type { AccountId, Balance } from '@polkadot/primitives/base';

function getBalance (accountId: AccountId): Balance {
 ...
}
```