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

value = arrayify(hexlify(value, options));
        // Fixed-width field
        if (fieldInfo.length && value.length !== fieldInfo.length && value.length > 0) {
            logger.throwArgumentError("invalid length for " + fieldInfo.name, ("transaction:" + fieldInfo.name), value);
        }
        // Variable-width (with a maximum)
        if (fieldInfo.maxLength) {
            value = stripZeros(value);
            if (value.length > fieldInfo.maxLength) {
                logger.throwArgumentError("invalid length for " + fieldInfo.name, ("transaction:" + fieldInfo.name), value);
            }
        }
        raw.push(hexlify(value));
    });
    if (transaction.chainId != null && transaction.chainId !== 0) {
        raw.push(hexlify(transaction.chainId));
        raw.push("0x");
        raw.push("0x");
    }
    const unsignedTransaction = RLP.encode(raw);
    // Requesting an unsigned transation
    if (!signature) {
        return unsignedTransaction;
    }
    // The splitSignature will ensure the transaction has a recoveryParam in the
    // case that the signTransaction function only adds a v.
    const sig = splitSignature(signature);
    // We pushed a chainId and null r, s on for hashing only; remove those
    let v = 27 + sig.recoveryParam;
    if (raw.length === 9) {
        raw.pop();
        raw.pop();

return this.getAddress().then((address) => {
            // https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign
            return this.provider.send("eth_sign", [address.toLowerCase(), hexlify(data)]);
        });
    }

throw new Error("unsupported cipher");
                }
                const address = computeAddress(privateKey);
                if (data.address) {
                    let check = data.address.toLowerCase();
                    if (check.substring(0, 2) !== "0x") {
                        check = "0x" + check;
                    }
                    if (getAddress(check) !== address) {
                        throw new Error("address mismatch");
                    }
                }
                const account = {
                    _isKeystoreAccount: true,
                    address: address,
                    privateKey: hexlify(privateKey)
                };
                // Version 0.1 x-ethers metadata must contain an encrypted mnemonic phrase
                if (searchPath(data, "x-ethers/version") === "0.1") {
                    const mnemonicCiphertext = looseArrayify(searchPath(data, "x-ethers/mnemonicCiphertext"));
                    const mnemonicIv = looseArrayify(searchPath(data, "x-ethers/mnemonicCounter"));
                    const mnemonicCounter = new aes.Counter(mnemonicIv);
                    const mnemonicAesCtr = new aes.ModeOfOperation.ctr(mnemonicKey, mnemonicCounter);
                    const path = searchPath(data, "x-ethers/path") || defaultPath;
                    const entropy = arrayify(mnemonicAesCtr.decrypt(mnemonicCiphertext));
                    const mnemonic = entropyToMnemonic(entropy);
                    const node = HDNode.fromMnemonic(mnemonic).derivePath(path);
                    if (node.privateKey != account.privateKey) {
                        throw new Error("mnemonic mismatch");
                    }
                    account.mnemonic = node.mnemonic;
                    account.path = node.path;

if (fieldInfo.numeric) {
            options.hexPad = "left";
        }
        value = arrayify(hexlify(value, options));
        // Fixed-width field
        if (fieldInfo.length && value.length !== fieldInfo.length && value.length > 0) {
            logger.throwArgumentError("invalid length for " + fieldInfo.name, ("transaction:" + fieldInfo.name), value);
        }
        // Variable-width (with a maximum)
        if (fieldInfo.maxLength) {
            value = stripZeros(value);
            if (value.length > fieldInfo.maxLength) {
                logger.throwArgumentError("invalid length for " + fieldInfo.name, ("transaction:" + fieldInfo.name), value);
            }
        }
        raw.push(hexlify(value));
    });
    if (transaction.chainId != null && transaction.chainId !== 0) {

export function computePublicKey(key: BytesLike, compressed?: boolean): string {
    const bytes = arrayify(key);

    if (bytes.length === 32) {
        const signingKey = new SigningKey(bytes);
        if (compressed) {
            return "0x" + getCurve().keyFromPrivate(bytes).getPublic(true, "hex");
        }
        return signingKey.publicKey;

    } else if (bytes.length === 33) {
        if (compressed) { return hexlify(bytes); }
        return "0x" + getCurve().keyFromPublic(bytes).getPublic(false, "hex");

    } else if (bytes.length === 65) {
        if (!compressed) { return hexlify(bytes); }
        return "0x" + getCurve().keyFromPublic(bytes).getPublic(true, "hex");
    }

    return logger.throwArgumentError("invalid public or private key", "key", "[REDACTED]");
}

function bytes32(value: BigNumber | Uint8Array): string {
    return hexZeroPad(hexlify(value), 32);
}

}
        for (var bit = 0; bit < 11; bit++) {
            if (index & (1 << (10 - bit))) {
                entropy[offset >> 3] |= (1 << (7 - (offset % 8)));
            }
            offset++;
        }
    }
    var entropyBits = 32 * words.length / 3;
    var checksumBits = words.length / 3;
    var checksumMask = getUpperMask(checksumBits);
    var checksum = bytes_1.arrayify(sha2_1.sha256(entropy.slice(0, entropyBits / 8)))[0] & checksumMask;
    if (checksum !== (entropy[entropy.length - 1] & checksumMask)) {
        throw new Error("invalid checksum");
    }
    return bytes_1.hexlify(entropy.slice(0, entropyBits / 8));
}
exports.mnemonicToEntropy = mnemonicToEntropy;

}
        for (let bit = 0; bit < 11; bit++) {
            if (index & (1 << (10 - bit))) {
                entropy[offset >> 3] |= (1 << (7 - (offset % 8)));
            }
            offset++;
        }
    }
    const entropyBits = 32 * words.length / 3;
    const checksumBits = words.length / 3;
    const checksumMask = getUpperMask(checksumBits);
    const checksum = arrayify(sha256(entropy.slice(0, entropyBits / 8)))[0] & checksumMask;
    if (checksum !== (entropy[entropy.length - 1] & checksumMask)) {
        throw new Error("invalid checksum");
    }
    return hexlify(entropy.slice(0, entropyBits / 8));
}
export function entropyToMnemonic(entropy, wordlist) {

var mnemonicIv = random_1.randomBytes(16);
            var mnemonicCounter = new aes_js_1.default.Counter(mnemonicIv);
            var mnemonicAesCtr = new aes_js_1.default.ModeOfOperation.ctr(mnemonicKey, mnemonicCounter);
            var mnemonicCiphertext = bytes_1.arrayify(mnemonicAesCtr.encrypt(entropy));
            var now = new Date();
            var timestamp = (now.getUTCFullYear() + "-" +
                utils_1.zpad(now.getUTCMonth() + 1, 2) + "-" +
                utils_1.zpad(now.getUTCDate(), 2) + "T" +
                utils_1.zpad(now.getUTCHours(), 2) + "-" +
                utils_1.zpad(now.getUTCMinutes(), 2) + "-" +
                utils_1.zpad(now.getUTCSeconds(), 2) + ".0Z");
            data["x-ethers"] = {
                client: client,
                gethFilename: ("UTC--" + timestamp + "--" + data.address),
                mnemonicCounter: bytes_1.hexlify(mnemonicIv).substring(2),
                mnemonicCiphertext: bytes_1.hexlify(mnemonicCiphertext).substring(2),
                path: path,
                version: "0.1"
            };
        }
        return JSON.stringify(data);
    });
}