41 lines
1023 B
Markdown
41 lines
1023 B
Markdown
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# Functions
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<a id="u8afixlength"></a>
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## u8aFixLength
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▸ **u8aFixLength**(value: *`Uint8Array`*, bitLength?: *`number`*, atStart?: *`boolean`*): `Uint8Array`
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*Defined in [u8a/fixLength.ts:21](https://github.com/polkadot-js/common/blob/e19d377/packages/util/src/u8a/fixLength.ts#L21)*
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*__name__*: u8aFixLength
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*__summary__*: Shifts a Uint8Array to a specific bitLength
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*__description__*: Returns a uint8Array with the specified number of bits contained in the return value. (If bitLength is -1, length checking is not done). Values with more bits are trimmed to the specified length.
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*__example__*:
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```javascript
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import { u8aFixLength } from '@polkadot/util';
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u8aFixLength('0x12') // => 0x12
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u8aFixLength('0x12', 16) // => 0x0012
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u8aFixLength('0x1234', 8) // => 0x12
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```
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**Parameters:**
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| Name | Type | Default value |
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| ------ | ------ | ------ |
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| value | `Uint8Array` | - |
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| `Default value` bitLength | `number` | -1 |
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| `Default value` atStart | `boolean` | false |
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**Returns:** `Uint8Array`
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___
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