WO2021042784A1

WO2021042784A1 - Domain name management system employing blockchain

Info

Publication number: WO2021042784A1
Application number: PCT/CN2020/094208
Authority: WO
Inventors: 白杰
Original assignee: 南京瑞祥信息技术有限公司
Priority date: 2019-09-06
Filing date: 2020-06-03
Publication date: 2021-03-11
Also published as: CN112468525A; CN112468525B; JP6954709B1; FR3100677A1; JP2021531707A

Abstract

The present application provides a domain name management system employing a blockchain. The system comprises a public chain consisting of a plurality of nodes and a CNS sub-chain consisting of a portion of the nodes of the public chain. All of the nodes of the public chain are configured with a root domain name smart contract, and the nodes constituting the CNS sub-chain have the same smart contract and functions as the nodes of the public chain. The nodes constituting the CNS sub-chain are configured to: generate a sub-domain name smart contract by means of executing the root domain name smart contract; and perform domain name registration, query, and update services by means of the root domain name smart contract and the sub-domain name smart contract. In the present application, a DNS system is deployed in a blockchain network in the form of a sub-chain so as to achieve a complete decentralized deployment. Moreover, the nodes in the sub-chain are used to execute the root domain name smart contract and the sub-domain name smart contract, so as to quickly perform domain name registration, query, and update services, thus improving response speed.

Description

A domain name management system based on blockchain

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910842324.2, and the invention title is "a blockchain-based domain name management system" on September 6, 2019. The entire content is incorporated by reference. In this application.

Technical field

This application relates to the field of blockchain network technology, and in particular to a domain name management system based on blockchain.

Background technique

The domain name management system, also known as the basic service of the Domain Name System (DNS, Domain Name System) Internet, provides the function of resolving domain names into real IP addresses, making network interconnection possible. As the basic support structure of the Internet, the root domain name server of DNS is controlled by ICANN, that is, DNS is a centralized multi-level system that violates the neutrality principle of the network. The main task of blockchain technology is to create a relatively objective non-repudiation digital environment in accordance with the requirements of the decentralized system and based on public consensus. Based on blockchain technology, the authenticity of network information can be guaranteed.

Therefore, a decentralized domain name system can be built based on blockchain technology. The blockchain-based domain name system (Blockchain Name System) adopts smart contract mechanisms or domain name protocol mechanisms to achieve a decentralized, open and scalable domain name system , Such as ENS based on Ethereum and Handshake based on UTXO model.

Among them, the job of ENS is to map readable domain names (such as "alice.eth") to address identifiers, such as Ethereum account addresses, contract addresses, file address metadata, etc. ENS reduces the complexity of the infrastructure by running on the dotted layer name system of the domain. By defining an unauthorized domain name protocol, Handshake enables each participating node to verify and manage the root zone, so that the domain name resolution server will point to an authoritative server, thereby submitting the requirements to the blockchain network instead of certificate authorization mechanism.

It can be seen that the operation of both ENS and Handshake is limited by the performance of the blockchain network, and cannot meet the demand for DNS services with more than billions of visits per day. At the same time, due to the consensus and verification mechanism of the blockchain network, the response speed of DNS requests is relatively slow, and nodes have a long waiting time after sending DNS requests, which affects the promotion and application of BNS services.

Summary of the invention

This application provides a blockchain-based domain name management system to solve the problem of slow response speed of the blockchain domain name system.

On the one hand, this application provides a blockchain-based domain name management system, including: a public chain composed of multiple nodes, and a CNS sub-chain composed of some nodes in the public chain; all nodes of the public chain The root domain name smart contract is configured in both;

The nodes constituting the CNS sub-chain have the same smart contracts and functions as the nodes of the public chain;

The nodes that make up the CNS sub-chain are configured to: execute the root domain name smart contract to generate a subdomain name smart contract; and through the root domain name smart contract and the subdomain name smart contract, complete domain name registration, query, and Update service.

Optionally, the subdomain name smart contract includes a top-level domain name smart contract and an application domain name smart contract;

Some of the nodes that make up the CNS sub-chain are configured to complete top-level domain services by executing the top-level domain smart contract, including management and maintenance of second-level domain information;

Part of the nodes constituting the CNS sub-chain are configured to complete application domain name services by executing the application domain name smart contract, including management and maintenance of domain name information above the second level.

Optionally, the nodes that make up the CNS sub-chain may distribute and store domain name information corresponding to the executed smart contract according to the executed smart contract.

Optionally, for the domain name registration service, the nodes constituting the CNS sub-chain are further configured as:

Initiate a registration transaction to the root domain name smart contract to trigger the execution of the root domain name smart contract;

According to the registration transaction, the registration voting result is fed back by executing the root domain name smart contract, and the registration voting result includes accepting or rejecting the addition of the domain name in the registration transaction;

If the feedback of the registration voting result meets the preset registration requirements, generate a top-level domain name smart contract through the root domain name smart contract;

A record pointing to the newly generated top-level domain name smart contract is added to the root domain name smart contract.

Optionally, the preset registration requirements include that the feedback of registration voting results is that the number of accepted votes is greater than or equal to the value of the first vote; or, within the preset voting period, the feedback of registration voting results is that the number of accepted votes is greater than or equal to The value of the second number of votes.

Optionally, for the domain name query service, the nodes constituting the CNS sub-chain are further configured as:

Receive the query transaction sent by the domain name query node;

In the query transaction, extract domain name information;

According to the executed smart contract, extract the DNS information corresponding to the domain name information;

Send the extracted DNS information to the domain name query node.

Optionally, some of the nodes that make up the CNS sub-chain are divided into contract owner nodes according to the executed smart contract; for the domain name update service, the contract owner node is further configured as:

Initiate an update transaction to the upper-level domain name smart contract that executes the smart contract at the update node, and trigger the execution of the upper-level domain name smart contract to perform the update service;

Verify the update data in the update transaction through the upper-level domain name smart contract; and, after the verification is passed, call the executed smart contract;

According to the update data, the executed smart contract is updated.

Optionally, the contract owner node includes: a follow-up owner node that executes a root domain name smart contract, a top-level owner node that executes a top-level domain smart contract, and an application owner node that executes an application domain name smart contract;

The upper-level domain name smart contract corresponding to the application owner node is the root domain name smart contract; the upper-level domain name smart contract corresponding to the top-level owner node is the root domain name smart contract; the upper-level domain name smart contract corresponding to the application owner node is the top-level domain name smart contract Domain name smart contract and/or root domain name smart contract.

On the other hand, this application also provides a blockchain-based domain name management system, including: a public chain composed of multiple nodes, and a CNS sub-chain composed of some nodes in the public chain and at least one DNS node; All nodes of the public chain and the DNS node are configured with a root domain name smart contract;

The nodes that make up the CNS sub-chain are configured to: execute the root domain name smart contract to generate a subdomain name smart contract; and through the root domain name smart contract and the subdomain name smart contract, complete domain name registration, query, and Update service;

The DNS node is configured to interface with the DNS system, so that the nodes in the DNS system can query the domain name information in the CNS sub-chain through the DNS node; and, the nodes in the public chain query the domain name information through the DNS node. Describe the domain name information in the DNS system.

Part of the nodes that make up the CNS sub-chain and the DNS node are configured to complete top-level domain name services by executing the top-level domain name smart contract, including management and maintenance of second-level domain name information;

Part of the nodes constituting the CNS sub-chain and the DNS node are configured to complete application domain name services by executing the application domain name smart contract, including management and maintenance of domain name information above the second level.

As can be seen from the above technical solutions, this application provides a blockchain-based domain name management system, including: a public chain composed of multiple nodes, and a CNS sub-chain composed of some nodes in the public chain. Among them, all nodes of the public chain are equipped with root domain name smart contracts; the nodes that make up the CNS sub-chain have the same smart contracts and functions as the nodes of the public chain; the nodes that make up the CNS sub-chain are configured as follows: by executing the root domain name intelligence Contract to generate sub-domain name smart contracts; and complete domain name registration, query and update services through root domain smart contracts and sub-domain smart contracts. This application deploys the DNS system in the blockchain network in the form of a sub-chain, which can realize a complete decentralized deployment. And through the sub-chain node to execute the root domain name smart contract and the sub-domain name smart contract to quickly complete the domain name registration, query and update services, and improve the response speed.

Description of the drawings

Figure 1 is a schematic diagram of the application for a domain name management system based on blockchain;

Figure 2 is a schematic diagram of the smart contract configuration of a domain name management system based on blockchain in this application;

Figure 3 is a schematic diagram of the service process of applying for domain name registration;

Figure 4 is a schematic diagram of the process of applying for a domain name query service;

Figure 5 is a schematic diagram of the process of applying for a domain name update service;

Figure 6 is a schematic structural diagram of another domain name management system based on blockchain in this application;

Figure 7 is a schematic diagram of the smart contract configuration of another blockchain-based domain name management system of this application.

detailed description

In the technical solution provided by this application, the blockchain network refers to a point-to-point network with a decentralized application architecture, and the blockchain network can perform distributed storage, public consensus, digital encryption, transaction accounting, and verification. That is, the blockchain network is a trading platform that covers distributed technology, cryptography, P2P network architecture, and various consensus algorithms that may be applied.

In this application, blockchain or blockchain data refers to the accounting information generated according to the transaction information when a transaction occurs in the blockchain network, that is, multiple transactions form one block of data, and multiple block data form one Blockchain with timestamp. The blockchain network includes nodes that establish a peer-to-peer network connection with each other. Each node is equipped with a corresponding consensus mechanism, such as a smart contract, and has sufficient computing power to perform transaction verification and accounting procedures. The node also has an interface specification that conforms to a certain unified standard to realize access to more nodes or other types of blockchain networks through the interface specification. The public chain is a point-to-point network structure composed of multiple nodes in the blockchain network, and each node has a distributed storage function and transaction and accounting functions; the nodes on the public chain provide a unified interface specification to the outside.

Refer to Figure 1, which is a schematic diagram of the structure of a domain name management system based on blockchain in this application. It can be seen from Fig. 1 that the blockchain-based domain name management system provided by this application includes: a public chain composed of multiple nodes, and a CNS sub-chain composed of some nodes in the public chain. In practical applications, for ease of description, the nodes that make up the public chain can be called public chain nodes, and the nodes that make up the CNS sub-chain can be called CNS sub-chain nodes. Obviously, in this embodiment, the nodes in the public chain can be public chain nodes, and can also serve as CNS sub-chain nodes at the same time. Since the CNS sub-chain node is composed of some nodes in the public chain, it is both a CNS sub-chain node and a public chain node. That is, the nodes constituting the CNS sub-chain have the same smart contracts and functions as the nodes of the public chain.

In practical applications, public chains can provide basic blockchain services in the network, such as transactions, verification, and storage. The public chain itself may not have specific functions corresponding to any field, but as a bridge, bringing all the sub-chains (or third-party blockchain networks) connected to the public chain into the same blockchain network, so that Different access chains can exchange transactions or transfer information with each other.

In the technical solution provided by this application, all nodes of the public chain are equipped with smart contracts. Smart contract is a consensus mechanism program based on blockchain transactions. Through smart contracts, various functional transaction operations can be realized. For example, through the root domain name smart contract, nodes can complete domain name registration, query and update by executing the root domain name smart contract. service.

In order to realize the domain name service, in this application, the nodes that make up the CNS sub-chain are configured to: generate a sub-domain smart contract by executing the root domain smart contract; and through the root domain smart contract and the sub-domain smart contract Smart contract, complete domain name registration, query and update services.

In practical applications, taking access to a server through a domain name as an example, when a user in the network enters domain name information in applications such as a terminal (node) browser, the node can first query the local cache for the IP address corresponding to the domain name. If it exists, directly extract the corresponding IP address to establish a communication connection with the IP address server. If it does not exist, applications such as browsers can send the entered domain name information to the DNS server for domain name query.

Therefore, in the technical solution provided by this application, the node can send the domain name information to the domain name management system, that is, to the CNS sub-chain. After the CNS sub-chain node receives the domain name information, it can query the IP address corresponding to the domain name information according to different smart contracts executed by itself.

In practical applications, there are a large number of domain names in the Internet, and the amount of data processing for querying IP addresses based on domain names is relatively large. Therefore, according to the server hierarchy of DNS domain name query, the nodes in the CNS sub-chain can be further divided into multiple Hierarchical relationship to deploy DNS query services hierarchically, and different levels provide different query ranges. For example, it is also possible to further create and deploy sub-domain smart contracts based on the root domain smart contract. Wherein, the subdomain name smart contract includes a top-level domain name smart contract and an application domain name smart contract.

In order to realize the query of the domain name, as shown in Figure 2, some of the nodes that make up the CNS sub-chain are configured to complete the top-level domain name service by executing the top-level domain smart contract, that is, some of the nodes of the CNS sub-chain can be used as the top-level domain. The function of the domain name server. Among them, the function of the top-level domain name server includes the management and maintenance of the second-level domain name information. In the same way, some of the nodes that make up the CNS sub-chain are configured to complete application domain name services by executing the application domain name smart contract, including management and maintenance of domain name information above the second level.

Therefore, after the node of the CNS sub-chain receives the domain name information, it must first determine that the node of the current CNS sub-chain can provide the query of the domain name. If it can, it directly returns the IP address data. If not, it needs to follow the application domain name and top-level The order of domain name and root domain name will be queried in turn. In order to obtain IP address data, the nodes constituting the CNS sub-chain according to the executed smart contract, distributed storage of domain name information corresponding to the executed smart contract.

It can be seen that in the technical solution provided by this application, the nodes in the CNS sub-chain system can cooperate with each other to complete the following tasks: initialize and deploy the root domain name smart contract; deploy related registration, query, update and other smart contracts; perform related registration Register, query, update and other smart contracts; and store and route related domain name records.

Specifically, as shown in FIG. 3, for the domain name registration service, the nodes constituting the CNS sub-chain are further configured as:

S101: Initiate a registration transaction to the root domain name smart contract to trigger the execution of the root domain name smart contract;

S102: According to the registration transaction, feedback a registration voting result by executing the root domain name smart contract, and the registration voting result includes accepting or rejecting the addition of the domain name in the registration transaction;

S103: If the feedback of the registration voting result meets the preset registration requirements, generate a top-level domain name smart contract through the root domain name smart contract;

S104: Add a record pointing to the newly generated top-level domain name smart contract in the root domain name smart contract.

In this embodiment, the server node to be registered in the domain name management system may first initiate a registration transaction to the root domain name smart contract to trigger the root domain name smart contract to be executed by the corresponding node. After the node executes the root domain name smart contract, it can vote based on the registration transaction and feedback the voting result. When the feedback voting result meets the preset registration requirements, it indicates that the current server domain name can be registered in the system. Therefore, the top-level domain name smart contract can be generated through the root domain name smart contract, and a pointer is added to the root domain name smart contract. The record of the newly generated top-level domain smart contract.

Wherein, the preset registration requirements include that the feedback of registration voting results is that the number of accepted votes is greater than or equal to the value of the first vote; or, within the preset voting period, the feedback of registration voting results is that the number of accepted votes is greater than or equal to the second value. The value of the number of votes.

Taking the top-level domain name service (TLD) as an example, in the actual registration process, the execution of the root domain name smart contract can be triggered by initiating a transaction to the root domain name smart contract; the owner of the root domain name smart contract can then vote or other Method, decide whether to accept the addition of the TLD domain name; the owner of the root domain name smart contract can choose to accept or reject the addition of the TLD domain name by initiating a transaction with the root domain name smart contract; if the registration is accepted, the new transaction is successful and the root domain name The domain name smart contract generates and deploys a new TLD smart contract. At the same time, a corresponding record is added to the root domain name smart contract to point to the new TLD smart contract to complete the new work.

In some embodiments of the present application, as shown in FIG. 4, for the domain name query service, the nodes constituting the CNS sub-chain are further configured as:

S201: Receive a query transaction sent by a domain name query node;

S202: Extract domain name information in the query transaction;

S203: Extract DNS information corresponding to the domain name information according to the executed smart contract;

S204: Send the extracted DNS information to the domain name query node.

In practical applications, the domain name query node can be any node in the current blockchain network. In the process of accessing the network, it can initiate a query transaction to the executed smart contract after triggering the domain name query service. The query transaction includes The domain name information to be queried. Then according to the executed smart contract, the corresponding DNS information is extracted, and then the extracted DNS information is sent to the domain name query node to complete the domain name query service. Among them, for different nodes, the smart contracts executed are different, so when the DNS information corresponding to the domain name information is extracted, the corresponding domain name query methods are also different. For example, if a node executes an application smart contract, its query scope is a domain name above the second level; if a node executes a top-level domain name contract, its query scope is a top-level domain name or a second-level domain name; the node executes a root domain name smart contract. The query scope is the root domain name or the first-level domain name.

In some embodiments of this application, as shown in FIG. 5, for the domain name update service, some of the nodes that make up the CNS sub-chain are divided into contract owner nodes according to the executed smart contract; the contract owner nodes are further Configured as:

S301: Initiate an update transaction to the upper-level domain name smart contract that executes the smart contract of the update node, and trigger the execution of the upper-level domain name smart contract to perform the update service;

S302: Verify the update data in the update transaction through the upper-level domain name smart contract; and, after the verification is passed, call the executed smart contract;

S303: Update the executed smart contract according to the update data.

In this embodiment, the contract owner node includes: a follower node that executes a root domain name smart contract, a top-level owner node that executes a top-level domain name smart contract, and an application owner node that executes an application domain name smart contract. The upper-level domain name smart contract corresponding to the application owner node is the root domain name smart contract; the upper-level domain name smart contract corresponding to the top-level owner node is the root domain name smart contract; the upper-level domain name smart contract corresponding to the application owner node is the top-level domain name smart contract Domain name smart contract and/or root domain name smart contract.

Take the update of a TLD domain name as an example. In practical applications, the owner of the TLD domain name that needs to be updated first calls the root domain name smart contract to update it through a transaction; then verifies and updates the existing root domain name through the root domain name smart contract. The TLD smart contract updates the corresponding information so that the TLD smart contract completes the corresponding update and returns the corresponding result; finally, the root domain name smart contract records the corresponding update result to complete the update operation.

Further, in order to improve the verification of the blockchain network and the ability to process high concurrent transactions, this application can further optimize and adjust the public chain architecture, such as: node role division, node grouping, partition verification, etc. Since the CNS sub-chain is composed of some nodes in the public chain, it can completely inherit the ability of the public chain, and also inherit the ability of the public chain to quickly verify and process high concurrent transactions.

In addition, in the CNS sub-chain network, the related smart contracts complete the registration, query, update and other operations of the domain name through transactions and transaction verification, and use the standard blockchain network consensus algorithm to ensure the consistency of the entire network data Sex. Therefore, the high-concurrency and fast transactions of the public chain network and its transaction verification capabilities can ensure that the CNS sub-chain network also has the corresponding capabilities, thereby effectively improving the lack of performance of the existing network.

This application also provides a blockchain-based domain name management system, as shown in Figure 6, including: a public chain composed of multiple nodes, and a CNS sub-chain composed of some nodes in the public chain and at least one DNS node Chain; all nodes of the public chain and the DNS node are configured with a root domain name smart contract;

In the domain name management system provided in this embodiment, the DNS system can be added to the CNS sub-chain in the form of a CNS sub-chain node, and this node is the DNS node. The DNS node can be the entire DNS system or a node in the DNS system, and the DNS system can interact with the outside world through this node. It can be seen that in this application, the DNS node has a DNS authoritative domain name server function, a domain name resolution server function, and a node with a CNS sub-chain function to complete the two-way compatibility with the traditional DNS system.

Similarly, in the technical solution provided by this application, as shown in Figure 7, the subdomain name smart contract includes a top-level domain name smart contract and an application domain name smart contract; some of the nodes that make up the CNS subchain and the DNS node are It is configured to complete top-level domain name services by executing the top-level domain name smart contract, including management and maintenance of second-level domain name information; part of the nodes that make up the CNS sub-chain and the DNS node are configured to: execute the application domain name Smart contract, complete application domain name service, including management and maintenance of domain name information above the second level.

It can be seen that in the CNS sub-chain, the execution of smart contracts can be triggered through transactions to complete decentralized domain name registration, query, update and other services. In practical applications, for the traditional DNS system, you can easily complete the query operation for the CNS domain name by setting the DNS node; at the same time, in the application of the blockchain network, if you need to access the network in the DNS system, you can also easily The traditional DNS resolution work is completed through the DNS nodes in the CNS sub-chain.

It should be noted that in this embodiment, in terms of phases, in the CNS sub-chain, the current TLD top-level domain registration in ICANN will not be opened, but through the DNS node and the IPFS network of the blockchain public chain , The distributed mirroring service of the DNS system can be performed in the CNS sub-chain, and the relevant DNS data can be backed up and stored, thereby avoiding the problem of inaccessibility due to the failure of the DNS network. In the long-term future, the CNS sub-chain can be used as an upgrade and replacement network of the existing DNS network. Whether it is a traditional DNS system or a blockchain-based domain name management system, the CNS sub-chain network can provide corresponding services in a unified manner. .

It can be seen from the above technical solutions that the blockchain-based domain name management system provided by this application also includes: a public chain composed of multiple nodes, and a CNS sub-chain composed of some nodes in the public chain and at least one DNS node . Wherein, the nodes constituting the CNS sub-chain are configured to: execute the root domain name smart contract to generate a subdomain name smart contract; and through the root domain name smart contract and the subdomain name smart contract to complete domain name registration, Query and update services; and, the DNS node is configured to interface with the DNS system, so that the nodes in the DNS system query the domain name information in the CNS sub-chain through the DNS node; and, the nodes in the public chain Query the domain name information in the DNS system through the DNS node. By embedding at least one DNS node in the CNS sub-chain, the domain name management system based on the blockchain network can be docked with the traditional DNS system. Since it is a node of the CNS sub-chain, the CNS sub-chain is essentially still satisfactory Complete decentralization requirements. In addition, the DNS system can be deployed to the blockchain network by modifying a small number of nodes in the DNS system, which can reduce the deployment workload and increase the application scope of the domain name management system.

The similar parts between the embodiments provided in this application can be referred to each other. The specific implementations provided above are only a few examples under the general concept of this application, and do not constitute a limitation of the protection scope of this application. For those skilled in the art, any other implementation manners expanded according to the scheme of this application without creative work shall fall within the protection scope of this application.

Claims

A domain name management system based on blockchain, which is characterized by comprising: a public chain composed of multiple nodes, and a CNS sub-chain composed of some nodes in the public chain; all nodes in the public chain are Configured with root domain name smart contract;

The nodes constituting the CNS sub-chain have the same smart contracts and functions as the nodes of the public chain;

The nodes that make up the CNS sub-chain are configured to: execute the root domain name smart contract to generate a subdomain name smart contract; and through the root domain name smart contract and the subdomain name smart contract, complete domain name registration, query, and Update service.
The domain name management system according to claim 1, wherein the sub-domain name smart contract includes a top-level domain name smart contract and an application domain name smart contract;

Some of the nodes that make up the CNS sub-chain are configured to complete top-level domain services by executing the top-level domain smart contract, including management and maintenance of second-level domain information;

Part of the nodes constituting the CNS sub-chain are configured to complete application domain name services by executing the application domain name smart contract, including management and maintenance of domain name information above the second level.
The domain name management system according to claim 2, wherein the nodes constituting the CNS sub-chains distribute and store domain name information corresponding to the executed smart contract according to the executed smart contract.
The domain name management system according to claim 2, wherein for the domain name registration service, the nodes constituting the CNS sub-chain are further configured as:

Initiate a registration transaction to the root domain name smart contract to trigger the execution of the root domain name smart contract;

According to the registration transaction, the registration voting result is fed back by executing the root domain name smart contract, and the registration voting result includes accepting or rejecting the addition of the domain name in the registration transaction;

If the feedback of the registration voting result meets the preset registration requirements, generate a top-level domain name smart contract through the root domain name smart contract;

A record pointing to the newly generated top-level domain name smart contract is added to the root domain name smart contract.
The domain name management system according to claim 4, wherein the preset registration requirements include that the feedback of the registration voting result is that the number of accepted votes is greater than or equal to the value of the first voting number; or, within the preset voting period, the feedback The result of registration voting is that the accepted quantity is greater than or equal to the second voting quantity value.
The domain name management system according to claim 2, wherein for the domain name query service, the nodes constituting the CNS sub-chain are further configured as:

Receive the query transaction sent by the domain name query node;

In the query transaction, extract domain name information;

According to the executed smart contract, extract the DNS information corresponding to the domain name information;

Send the extracted DNS information to the domain name query node.
The domain name management system according to claim 2, wherein a part of the nodes that make up the CNS sub-chain are divided into contract owner nodes according to the executed smart contract; for domain name update services, the contract owner nodes are further Configured as:

Initiate an update transaction to the upper-level domain name smart contract that executes the smart contract at the update node, and trigger the execution of the upper-level domain name smart contract to perform the update service;

Verify the update data in the update transaction through the upper-level domain name smart contract; and, after the verification is passed, call the executed smart contract;

According to the update data, the executed smart contract is updated.
The domain name management system according to claim 7, wherein the contract owner node includes: a follower node that executes a root domain name smart contract, a top-level owner node that executes a top-level domain name smart contract, and an application domain name smart contract that executes The application owner node;

The upper-level domain name smart contract corresponding to the application owner node is the root domain name smart contract; the upper-level domain name smart contract corresponding to the top-level owner node is the root domain name smart contract; the upper-level domain name smart contract corresponding to the application owner node is the top-level domain name smart contract Domain name smart contract and/or root domain name smart contract.
A domain name management system based on blockchain, which is characterized by comprising: a public chain composed of multiple nodes, and a CNS sub-chain composed of some nodes in the public chain and at least one DNS node; the public chain All nodes in and the DNS nodes are configured with root domain name smart contracts;

The nodes constituting the CNS sub-chain have the same smart contracts and functions as the nodes of the public chain;

The nodes that make up the CNS sub-chain are configured to: execute the root domain name smart contract to generate a subdomain name smart contract; and through the root domain name smart contract and the subdomain name smart contract, complete domain name registration, query, and Update service;

The DNS node is configured to interface with the DNS system, so that the nodes in the DNS system can query the domain name information in the CNS sub-chain through the DNS node; and, the nodes in the public chain query the domain name information through the DNS node. Describe the domain name information in the DNS system.
The domain name management system according to claim 9, wherein the subdomain name smart contract includes a top-level domain name smart contract and an application domain name smart contract;

Part of the nodes that make up the CNS sub-chain and the DNS node are configured to complete top-level domain name services by executing the top-level domain name smart contract, including management and maintenance of second-level domain name information;

Part of the nodes constituting the CNS sub-chain and the DNS node are configured to complete application domain name services by executing the application domain name smart contract, including management and maintenance of domain name information above the second level.