@dioxide-js/web3.js/lib/esm/utils/extractPublicKey.js

dioxide javascript API

// import base32Encode from "base32-encode"
import base32Decode from 'base32-decode';
import crc32c from 'crc-32/crc32c.js';
import { areUint8ArraysEqual, concat } from './buffer.js';
export function extractPublicKey(address) {
    const [splitAddr] = address.split(':');
    const addressUintArr = new Uint8Array(base32Decode(splitAddr, 'Crockford'));
    const publicKey = addressUintArr.slice(0, 32);
    const checkAddrUintArr = PK2Addr(publicKey);
    if (areUint8ArraysEqual(addressUintArr, checkAddrUintArr)) {
        return publicKey;
    }
    return null;
}
function PK2Addr(publicKey) {
    const rollingCRC = 3;
    const encryptMethod = 0x3;
    let errorCorrectingCode = crc32c.buf(publicKey, rollingCRC);
    errorCorrectingCode = (errorCorrectingCode & 0xfffffff0) | encryptMethod;
    errorCorrectingCode = errorCorrectingCode >>> 0;
    const buffer = new Int32Array([errorCorrectingCode]).buffer;
    const errorCorrectingCodeBuffer = new Uint8Array(buffer);
    const mergedBuffer = concat(publicKey, errorCorrectingCodeBuffer);
    return mergedBuffer;
}
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