CN108768659B - Token asset cross-chain transfer system between different block chain networks - Google Patents
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- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
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Abstract
The invention discloses a Token asset cross-chain transfer system among different block chain networks, which comprises: a cross-link gateway unit, a cross-link gateway client unit and a certification proxy gateway protocol unit. The method is simple and flexible in deployment of the cross-chain gateway, does not need to depend on a complex intermediate chain, and can rapidly deploy the cross-chain gateway to butt the external chain by the Token introduction chain only by supporting the TAGP protocol, so that the external chain Token is introduced into the chain, and the value transfer of the Token cross-chain is realized. Countless types of Token are introduced to the chain circulation, so that the chain internal ecology is richer, and the wider business application requirements are met; in addition, the cross-chain gateway enables the chains to be interconnected and communicated, and the Token chains are freely transferred to form a block chain value network; in the aspect of safety, the cross-link gateway manages Token in a multiple signature and offline signature mode, and the account safety of the cross-link gateway is guaranteed.
Description
Technical Field
The invention relates to the field of block chain technology application, in particular to a Token asset cross-chain transfer system among different block chain networks.
Background
The block chain technology is a distributed account book technology, has chain types such as public chain, alliance chain and private chain, and the cross chain technology is the key of realizing value network between the chain, and it is the good medicine that the single chain was saved out from the solitary island of dispersion, is the bridge that the block chain outwards expands and connects, and along with the development of block chain trade, the cross chain technology of various connection different block chains also is paid attention to and is explored by people.
Currently, there are three main modes of chain crossing:
1. notary mechanisms (Notary schemes), representing the project: ripple;
assuming that a and B are not mutually trustable, a third party, who is both a and B able to trust together, is introduced to act as a notary as an intermediary. In this way, a and B can indirectly trust each other. A representative solution is the interleaver, which is not an account book per se and does not seek any consensus. Instead, it provides a top level cryptographic escrow system called a "connector" that allows funds to flow between accounts with the assistance of this intermediary. The advantage of this solution is that it is very simple and well understood, and the disadvantages are also evident. There are some conflicts in this model and the concept of decentralization of blockchains, so many do not consider it to be a blockchain, but rather a centralized product.
2. Side chains/relays (Sidechains/relays), representing the project: Rootstock/Polkadot;
in general, the backbone is not aware of the presence of side chains, which must be known. RootStock is an intelligent contract distributed platform built on bitcoin block chains. The goal is to implement complex intelligent contracts as a side chain, adding value and functionality to the core bitcoin network.
The repeater mode is typically a polkadot repeating chain. And a relay is a channel from chain to chain, and if the channel itself is a block chain, then it is a relay chain. The project adopts a skillful method, namely a mechanism of multiple signatures, locks the main-chain asset, anchors and executes the main-chain asset on a side chain, and the transaction on the side chain determines whether the transaction is effective or not through the joint voting of the multiple signatures.
3. Hash-locking (Hash-locking), representing an item: lightning-network;
the hash lock originated from the bitcoin lightning network, which itself is a small, fast payment means, and its key technology hash time lock contract was later applied to the cross-link technology. While hash locking enables the exchange of cross-chain assets, it does not enable the transfer of cross-chain assets, much less so that its application scenario is relatively limited.
The block chain cross-chain technologies such as a current notary mechanism, a side chain/repeater mode, Hash locking and the like all depend on an intermediate block chain to complete circulation and transaction of Token, and the intermediate chain is complex in deployment and extremely high in requirement, so that the cross-chain is lack of flexibility. In addition, at present, these chain-crossing technologies can only transfer Token to the intermediate chain, and then exchange Token through third-party intermediary Token of the intermediate chain or exchange mode between Token to perform Token exchange, thereby completing value conversion, and after exchange, the obtained Token can be transferred to the personal account of the chain to which it belongs. Although these cross-chain technologies can realize value exchange among Token, Token can only circulate in the middle chain, and cannot complete value transfer of Token circulation on other chains, and if an external chain Token cannot be introduced into a chain, the chain cannot realize diversified chain ecology.
Therefore, in view of the above situation, there is an urgent need to develop a Token asset cross-chain transfer system between different blockchain networks to overcome the shortcomings in the current practical application.
Disclosure of Invention
The present invention is directed to a system for transferring Token assets across chains between different blockchain networks, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a system for transferring Token assets across chains between different blockchain networks, comprising:
cross-chain gateway unit: managing and maintaining private key and multi-signature address information of the agent Token; providing a roll-in/roll-out Token to receive a multi-signature address; realizing TAGP protocol adaptation of the butt joint chain and completing Token chain-crossing transfer-in-out proxy;
a cross-link gateway client unit: providing a gateway operation function for a user, and assisting a gateway to complete a Token transfer-in and transfer-out function;
the certification-passing proxy gateway protocol unit: the protocol requires that the introduced chain supports the intra-chain transaction circulation of creating an agent Token, increasing and issuing the agent Token, destroying the agent Token with the specified amount and the agent Token.
As a further scheme of the invention: the cross-chain gateway client unit supports chain transaction packaging and message signing.
Compared with the prior art, the invention has the beneficial effects that:
the Token asset cross-chain transfer system between different block chain networks achieves the technical effects that:
1) the deployment of the cross-link gateway is simple and flexible, a complex intermediate link is not required, if a certain link supports the TAGP protocol, the cross-link gateway can be rapidly deployed to butt the external link, and the external link Token is introduced into the link;
2) token cross-chain value transfer is really realized, an external chain Token can be subjected to value circulation in an introduced chain, countless types of Tokens are introduced, the internal chain ecology is richer, and the wider business application requirements are met;
3) interconnection and intercommunication among chains and free transfer among Token chains are realized, and a block chain value network is realized;
4) the gateway manages Token in a multiple signature and offline signature mode, and the security of the gateway account is guaranteed.
Drawings
Fig. 1 is a cross-link gateway-service design diagram.
FIG. 2 is a timing diagram of the cross-link gateway-Token cross-link in-out operation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, in an embodiment of the present invention, a Token asset cross-chain transfer system between different blockchain networks includes:
cross-chain gateway unit: managing and maintaining private keys, multi-signature addresses and other information of the agent Token; providing a roll-in/roll-out Token to receive a multi-signature address; realizing TAGP protocol adaptation of the butt joint chain and completing Token chain-crossing transfer-in-out proxy;
a cross-link gateway client unit: providing a gateway operation function for a user, wherein the gateway operation function supports chain transaction packaging and message signing and assists a gateway to complete a Token transferring-in and transferring-out function;
the certification-passing proxy gateway protocol unit: the protocol requires that the introduced chain supports the intra-chain transaction circulation of creating an agent Token, increasing and issuing the agent Token, destroying the agent Token with the specified amount and the agent Token.
Assuming that a chain user Alice wants to transfer Atoken on the a chain to a B chain user Bob, the centralized node C has a multi-signature wallet address Ca in the a chain, with multi-signature address Cb in the B chain, Alice transfers N number of atokens to multi-signature address Ca of C, signing the transaction and the purpose by using the private key of the wallet, sending B chain address generation information Aid of Bob to C, after C receives Atoken transferred by Alice, comparing the transaction signature with the Aid signature to determine whether the same person exists, if so, C issues the transaction signature in a B chain by using a Token of the B chain (1. if the agent Token is issued, N Atoken 'can be directly issued in the B chain; 2. if a sufficient number of labels are in local Cb, direct transfer can be performed), and N substitute labels Atoken' of Atoken are issued by the function, and transferring N Atoken 'to the address Bb of the bob, so that the Atoken' can freely trade and circulate in the chain B to realize value transfer. In addition, if Atoken 'wants to transfer out of the B chain, Atoken' can be transferred into a Cb multi-signature address of the gateway, the gateway is transferred into a transaction and the transferred A chain target address is notified to the gateway, Token is transferred onto the A chain through the gateway, after the transfer-out is completed, the Atoken 'transfer-out quota is destroyed on the B chain, and the transfer-out quantity balance of Atoken' is kept.
The technical problem to be solved by the application is as follows:
1) the problem that the current chain-crossing technology depends on a complex intermediate chain is solved, and a flexible deployment, simple and efficient chain-crossing value transfer mode is provided;
2) a protocol standard is proposed to realize Token transfer across chains, i.e. TAGP (Token _ efficient _ gateway protocol), which will allow each Token to flow directly over all block chains.
The technical effect that this application reaches does:
1) the deployment of the cross-link gateway is simple and flexible, a complex intermediate link is not required, if a certain link supports the TAGP protocol, the cross-link gateway can be rapidly deployed to butt the external link, and the external link Token is introduced into the link;
2) token cross-chain value transfer is really realized, an outer chain Token can be subjected to value circulation in an introduced chain, and countless types of Tokens are introduced to enrich the ecology in the chain, so that the requirement of wider business application is met;
3) interconnecting and intercommunicating the block chains, and freely transferring Token between the chains to realize a block chain value network;
4) the gateway manages Token in a multiple signature and offline signature mode, and the security of the gateway account is guaranteed.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (1)
1. A system for transferring Token assets across chains between different blockchain networks, comprising:
cross-chain gateway unit: managing and maintaining private key and multi-signature address information of the agent Token; providing a roll-in/roll-out Token to receive a multi-signature address; realizing TAGP protocol adaptation of the butt joint chain and completing Token chain-crossing transfer-in-out proxy;
a cross-link gateway client unit: providing a gateway operation function for a user, and assisting a gateway to complete a Token transfer-in and transfer-out function;
the certification-passing proxy gateway protocol unit: the protocol requires the introduction chain to support the intra-chain transaction circulation of creating an agent Token, increasing a distribution agent Token, destroying an agent Token with a specified amount and an agent Token;
the cross-chain gateway client unit supports chain transaction packaging and message signing.
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| CN110910101B (en) * | 2019-10-24 | 2022-09-06 | 南京可信区块链与算法经济研究院有限公司 | Token accounting method, system and storage medium based on UTXO model |
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| CN112256792A (en) * | 2020-09-17 | 2021-01-22 | 南京数字星球科技有限公司 | Block chain cross-chain data interaction and verification method, block chain system and storage medium |
| CN111970129B (en) * | 2020-10-21 | 2021-01-01 | 腾讯科技（深圳）有限公司 | Data processing method and device based on block chain and readable storage medium |
| CN112272114A (en) * | 2020-10-28 | 2021-01-26 | 成都质数斯达克科技有限公司 | Method, device, equipment and storage medium for sending information across block chain network |
| CN112287029B (en) * | 2020-11-17 | 2023-05-16 | 北京物资学院 | Block chain multi-chain cross-chain system and implementation mechanism thereof |
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