| 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 { u8aEq } from "../u8a/eq.js";
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| 4 | import { isU8a } from "./u8a.js";
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| 5 | const WASM_MAGIC = new Uint8Array([0, 97, 115, 109]); // \0asm
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| 6 |
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| 7 | /**
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| 8 | * @name isWasm
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| 9 | * @summary Tests if the input has a WASM header
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| 10 | * @description
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| 11 | * Checks to see if the input Uint8Array contains a valid WASM header
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| 12 | */
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| 13 |
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| 14 | export function isWasm(value) {
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| 15 | return isU8a(value) && u8aEq(value.subarray(0, 4), WASM_MAGIC);
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| 16 | } |
| \ | No newline at end of file |