How to use the gear.utils.types.encode_hex function in gear

async def send_transaction(self, transaction):
        chain_tag = int((await thor.get_block(0))["hash"][-2:], 16)
        blk_ref = int(strip_0x((await thor.get_block("best"))["hash"])[:8], 16)
        tx = ThorTransaction(chain_tag, blk_ref, transaction)
        tx.sign(self.account_manager.get_priv_by_addr(transaction["from"]))
        raw = "0x{}".format(encode_hex(rlp.encode(tx)))
        return await self.send_raw_transaction(raw)

    def _convert_hash(key): return "0x{}".format(encode_hex(sha3(to_bytes(hexstr=key))))
    return {

def mk_pbkdf2_params():
    params = PBKDF2_CONSTANTS.copy()
    params['salt'] = encode_hex(os.urandom(16))
    return params

def aes_mkparams():
    return {"iv": encode_hex(os.urandom(16))}

derivedkey = kdfeval(pw, kdfparams)
    assert len(derivedkey) >= 32, \
        "Derived key must be at least 32 bytes long"
    # print(b'derivedkey: ' + encode_hex(derivedkey))
    enckey = derivedkey[:16]
    # print(b'enckey: ' + encode_hex(enckey))
    ctext = decode_hex(cryptdata["ciphertext"])
    # Decrypt the ciphertext
    o = decrypt(ctext, enckey, cipherparams)
    # Compare the provided MAC with a locally computed MAC
    # print(b'macdata: ' + encode_hex(derivedkey[16:32] + ctext))
    mac1 = sha3(derivedkey[16:32] + ctext)
    mac2 = decode_hex(cryptdata["mac"])
    if mac1 != mac2:
        raise ValueError("MAC mismatch. Passcode incorrect?")
    return encode_hex(o)

def mk_scrypt_params():
    params = SCRYPT_CONSTANTS.copy()
    params['salt'] = encode_hex(os.urandom(16))
    return params