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x/polkadot/util/is/wasm.ts

Package publishing for deno.land/x/polkadot
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import { u8aEq } from '../u8a/eq.ts';import { isU8a } from './u8a.ts';
const WASM_MAGIC = new Uint8Array([0, 97, 115, 109]); // \0asm
/** * @name isWasm * @summary Tests if the input has a WASM header * @description * Checks to see if the input Uint8Array contains a valid WASM header */export function isWasm (value?: unknown): value is Uint8Array { return isU8a(value) && u8aEq(value.subarray(0, 4), WASM_MAGIC);}