@polkadot/extension-inject/cyrb53.js

A generic injector (usable to any extension), that populates the base exposed interfaces to be used by dapps.

export function cyrb53(input, seed = Date.now()) {
    let h1 = 0xdeadbeef ^ seed;
    let h2 = 0x41c6ce57 ^ seed;
    for (let i = 0, count = input.length; i < count; i++) {
        const ch = input.charCodeAt(i);
        h1 = Math.imul(h1 ^ ch, 2654435761);
        h2 = Math.imul(h2 ^ ch, 1597334677);
    }
    h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507) ^ Math.imul(h2 ^ (h2 >>> 13), 3266489909);
    h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507) ^ Math.imul(h1 ^ (h1 >>> 13), 3266489909);
    // https://stackoverflow.com/a/52171480
    return (h2 >>> 0).toString(16).padStart(8, '0') + (h1 >>> 0).toString(16).padStart(8, '0');
}