How to use the @ethersproject/bytes.hexZeroPad function in @ethersproject/bytes

value: handleNumber(transaction[4]),
        data: transaction[5],
        chainId: 0
    };
    // Legacy unsigned transaction
    if (transaction.length === 6) {
        return tx;
    }
    try {
        tx.v = BigNumber.from(transaction[6]).toNumber();
    }
    catch (error) {
        console.log(error);
        return tx;
    }
    tx.r = hexZeroPad(transaction[7], 32);
    tx.s = hexZeroPad(transaction[8], 32);
    if (BigNumber.from(tx.r).isZero() && BigNumber.from(tx.s).isZero()) {
        // EIP-155 unsigned transaction
        tx.chainId = tx.v;
        tx.v = 0;
    }
    else {
        // Signed Tranasaction
        tx.chainId = Math.floor((tx.v - 35) / 2);
        if (tx.chainId < 0) {
            tx.chainId = 0;
        }
        let recoveryParam = tx.v - 27;
        const raw = transaction.slice(0, 6);
        if (tx.chainId !== 0) {
            raw.push(hexlify(tx.chainId));

signDigest(digest) {
        const keyPair = getCurve().keyFromPrivate(arrayify(this.privateKey));
        const signature = keyPair.sign(arrayify(digest), { canonical: true });
        return splitSignature({
            recoveryParam: signature.recoveryParam,
            r: hexZeroPad("0x" + signature.r.toString(16), 32),
            s: hexZeroPad("0x" + signature.s.toString(16), 32),
        });
    }
    computeSharedSecret(otherKey) {

function bytes32(value) {
    return bytes_1.hexZeroPad(bytes_1.hexlify(value), 32);
}
function base58check(data) {

SigningKey.prototype.signDigest = function (digest) {
        var keyPair = getCurve().keyFromPrivate(bytes_1.arrayify(this.privateKey));
        var signature = keyPair.sign(bytes_1.arrayify(digest), { canonical: true });
        return bytes_1.splitSignature({
            recoveryParam: signature.recoveryParam,
            r: bytes_1.hexZeroPad("0x" + signature.r.toString(16), 32),
            s: bytes_1.hexZeroPad("0x" + signature.s.toString(16), 32),
        });
    };
    SigningKey.prototype.computeSharedSecret = function (otherKey) {

signDigest(digest) {
        const keyPair = getCurve().keyFromPrivate(arrayify(this.privateKey));
        const signature = keyPair.sign(arrayify(digest), { canonical: true });
        return splitSignature({
            recoveryParam: signature.recoveryParam,
            r: hexZeroPad("0x" + signature.r.toString(16), 32),
            s: hexZeroPad("0x" + signature.s.toString(16), 32),
        });
    }
    computeSharedSecret(otherKey) {

if (format == null) { format = "fixed"; }

        const fixedFormat = FixedFormat.from(format);

        const numeric = parseFixed(value, fixedFormat.decimals);

        if (!fixedFormat.signed && numeric.lt(Zero)) {
            throwFault("unsigned value cannot be negative", "overflow", "value", value);
        }

        let hex: string = null;
        if (fixedFormat.signed) {
            hex = numeric.toTwos(fixedFormat.width).toHexString();
        } else {
            hex = numeric.toHexString();
            hex = hexZeroPad(hex, fixedFormat.width / 8);
        }

        const decimal = formatFixed(numeric, fixedFormat.decimals);

        return new FixedNumber(_constructorGuard, hex, decimal, fixedFormat);
    }

toHexString(width?: number): string {
        if (width == null) { return this._hex; }
        if (width % 8) { logger.throwArgumentError("invalid byte width", "width", width); }
        const hex = BigNumber.from(this._hex).fromTwos(this.format.width).toTwos(width).toHexString();
        return hexZeroPad(hex, width / 8);
    }

computeSharedSecret(otherKey) {
        const keyPair = getCurve().keyFromPrivate(arrayify(this.privateKey));
        const otherKeyPair = getCurve().keyFromPublic(arrayify(computePublicKey(otherKey)));
        return hexZeroPad("0x" + keyPair.derive(otherKeyPair.getPublic()).toString(16), 32);
    }
    static isSigningKey(value) {

FixedNumber.prototype.toHexString = function (width) {
        if (width == null) {
            return this._hex;
        }
        if (width % 8) {
            logger.throwArgumentError("invalid byte width", "width", width);
        }
        var hex = bignumber_1.BigNumber.from(this._hex).fromTwos(this.format.width).toTwos(width).toHexString();
        return bytes_1.hexZeroPad(hex, width / 8);
    };
    FixedNumber.prototype.toUnsafeFloat = function () { return parseFloat(this.toString()); };