| 1 | // Copyright 2017-2022 @polkadot/util authors & contributors
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| 2 | // SPDX-License-Identifier: Apache-2.0
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| 3 | import { hexToU8a } from "../hex/toU8a.js";
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| 4 | import { isNull } from "../is/null.js";
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| 5 | import { isUndefined } from "../is/undefined.js";
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| 6 | import { numberToHex } from "./toHex.js";
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| 7 | /**
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| 8 | * @name numberToU8a
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| 9 | * @summary Creates a Uint8Array object from a number.
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| 10 | * @description
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| 11 | * `null`/`undefined`/`NaN` inputs returns an empty `Uint8Array` result. `number` input values return the actual bytes value converted to a `Uint8Array`. With `bitLength`, it converts the value to the equivalent size.
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| 12 | * @example
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| 13 | * <BR>
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| 14 | *
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| 15 | * ```javascript
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| 16 | * import { numberToU8a } from '@polkadot/util';
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| 17 | *
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| 18 | * numberToU8a(0x1234); // => [0x12, 0x34]
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| 19 | * ```
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| 20 | */
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| 21 |
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| 22 | export function numberToU8a(value, bitLength = -1) {
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| 23 | return isUndefined(value) || isNull(value) || isNaN(value) ? new Uint8Array() : hexToU8a(numberToHex(value, bitLength));
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| 24 | } |
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