CN110033271B - Cross-chain transaction method, system and computer readable storage medium - Google Patents
Cross-chain transaction method, system and computer readable storage medium Download PDFInfo
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- CN110033271B CN110033271B CN201910225549.3A CN201910225549A CN110033271B CN 110033271 B CN110033271 B CN 110033271B CN 201910225549 A CN201910225549 A CN 201910225549A CN 110033271 B CN110033271 B CN 110033271B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012546 transfer Methods 0.000 claims abstract description 9
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 2
- 238000013459 approach Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
- G06Q20/3829—Payment protocols; Details thereof insuring higher security of transaction involving key management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
Abstract
The invention discloses a cross-chain transaction method, a system and a computer readable storage medium, wherein the cross-chain transaction method is characterized by aiming at 2 blockchains based on DPoS consensus: 2 blockchains have a common block producer; a user in one of the blockchains initiates a transaction that, after being reviewed and voted by the blockproducer, can transfer funds in an account on one blockchain across the chain to an account on the other blockchain. The method, the system and the computer readable storage medium for the cross-chain transaction are easy to implement, and the cross-chain transaction is simple and convenient.
Description
Technical Field
The invention relates to a cross-chain transaction method, a system and a computer readable storage medium, which can be applied to block chain cross-chain based on DPoS consensus.
Background
Interpretation of technical terms
Proxy benefit attestation (Delegated Proof of Stake, DPoS): DPoS is a system in which a fixed number of selected entities, called chunk producers or witness, are chosen to create chunks in a recurring order.
Block producers are determined by network user votes, each of which gets a vote proportional to the number of tokens they have (their shares) on the network.
Alternatively, the election may choose to delegate their equity to another election, the delegated election will vote on the block producer's representative blockchain system EOS using the DPoS consensus on behalf of them.
Cross-chain
Refers to transferring digital assets from one blockchain to another blockchain.
The currently mainstream cross-chain technology includes:
1. notary schemes (Notary schemes);
2. side chains/relays (sidichains/relays);
3. hash-locking (Hash-locking);
smart contract: is a computer protocol that aims to propagate, verify or execute contracts in an informative manner. Smart contracts allow trusted transactions to be made without third parties, which transactions are traceable and irreversible. The smart contract concept was first proposed by Nick Szabo in 1995. The purpose of smart contracts is to provide a security approach that is superior to traditional contracts and to reduce other transaction costs associated with the contracts. At present, various blockchains provide intelligent contracts capable of being safely operated, and representative ones are: ethernet, EOS.
In the prior art, for cross-chain transactions, there are the following mechanisms:
(1) Notary mechanism: third party relay needs to be relied upon. Is a centralized approach and the idea violation of blockchain de-centering.
(2) Side chain/relay: one chain depends on the other chain, and the validity of the transaction can be determined by acquiring all transaction information of the other chain. Occasionally, the two chains are too strong.
(3) Hash locking: two user sides which need to cross the chain mutually transmit the information of the hash, need to know each other, and have strong limitation.
Accordingly, there is a need for a new cross-chain transaction method, system, and computer-readable storage medium.
Disclosure of Invention
The invention aims to provide a cross-chain transaction method, a system and a computer readable storage medium, which are easy to implement.
The technical proposal of the invention is as follows:
a cross-chain transaction method for 2 blockchains based on DPoS consensus: 2 blockchains have a common block producer;
a user in one blockchain initiates a transaction that, after being audited and voted by a blockproducer, can transfer tokens in accounts on one blockchain across the chain to accounts on the other blockchain.
The transaction flow is as follows:
the 2 blockchains are blockchain a and blockchain B; the process by which a user on blockchain a transfers a token on account a1 of blockchain a to account B1 on blockchain B is as follows:
step 1: user initiates a transaction with the name atobtx of a cross-chain transaction in blockchain a;
elements of the transaction:
account a1 on blockchain a;
account B1 on blockchain B;
transaction amount x;
step 2: the block producer of blockchain a verifies transaction atobtx, specifically verifies if usera has enough tokens in the a-chain and if usera has the authority of the a1 account in the a-chain;
step 3: in blockchain a, validating and voting on the transaction;
when the block producer exceeding 2/3 passes the verification and votes, executing the transaction in the cross-link contract of the block chain A, and deducting the token of the corresponding transaction amount of the user a1 account on the block chain A, namely deducting x;
step 4: a block producer initiates a cross-link transaction to a cross-link contract of block chain B, carrying the following information:
named atobtx transaction id;
transaction payee account number for blockchain B;
transaction token amount.
Step 5: the block producer of the block chain B votes for the transaction, and after the contract judges that 2/3 of the block producer votes pass, the medal x enters the B1 account of the block chain B;
the cross-chain transaction is completed so far.
All block producers are both block producers of blockchain A and block producers of blockchain B, both the personnel involved in managing blockchain A and the personnel involved in managing blockchain B.
A cross-chain transaction system comprising 2 blockchains and a plurality of nodes on the blockchains, each node having a corresponding account on the blockchain for storing tokens;
also included on each blockchain is a cross-link contract module; the cross-link contract module is used for auditing and voting the cross-link transaction and deducting the medal from the account number of the node or transferring the medal into the account of the node based on the cross-link transaction;
each transaction node is provided with a cross-link transaction initiating module for initiating a cross-link transaction;
and implementing the cross-chain transaction by adopting the cross-chain transaction method.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, enables the aforementioned cross-chain transaction.
The beneficial effects are that:
according to the cross-chain transaction method, the system and the computer readable storage medium, in a public chain based on DPoS consensus, no notary participation is needed, all transaction information of the other chain is not needed to be acquired by a block chain party of the cross-chain, and the validity of the transaction is not verified on the chain. Nor does it require that the cross-chain must have two parties to operate. After the user initiates a transaction of the asset across the chain at chain a. A transaction is automatically generated in the B chain by voting by the block producer of the DPoS consensus, and coins are placed for the user in the B chain. The invention realizes a convenient cross-chain transaction scheme.
The invention designs a method for performing cross-chain by using a block producer generating DPoS consensus as a verification executor of a transaction. The method can effectively utilize the block producer of the block chain using the DPoS consensus, and ensure the real-time reliability and the public transparency of the cross-chain transaction.
The invention has the following characteristics:
1. the invention adopts the block producer based on DPoS block chain to carry out the cross-chain, thereby ensuring the smooth transfer of the asset among various chains. The safety of the block chain system is ensured, and the disclosure is transparent.
2. By adopting the cross-chain method, the performance of the blockchain can be effectively expanded, the transfer of assets among the chains is not worried, a set of blockproducers can deploy a plurality of chains, the transaction number of each transaction is improved, and the blockchain is expanded to a larger application field.
Detailed Description
The invention will be described in further detail with reference to the following examples:
example 1:
1) Blockchain use DPoS consensus
Using DPoS consensus, the number of voted out block producers is determined, e.g., 21, not exceeding this number. The normal operation of the blockchain requires fewer than 1/3 of the nodes to be disliked. Normal operation of the producer node depending on more than 2/3 ensures normal operation of the chain.
The same block producer that is used across both chains of the chain, i.e., the block producer that the a chain election produced, is required, as well as the block producer of the B chain. The block producer list generated by the a-chain may be sent to the B-chain over the network. I.e., the a-chain and the B-chain share a set of block producers.
The block producer can determine the behavior on the blockchain by only passing more than 2/3 votes. The block producer has rights to manage the blockchain. Contract upgrades such as EOS require over 2/3 of the block producers to vote through.
That is, all block producers are both block producers of the A chain and block producers of the B chain, both the personnel involved in the management of the A chain and the personnel involved in the management of the B chain. And simultaneously, the node of the A chain is required to be operated, and the node of the B chain is also required to be operated. The block producer can verify whether the transaction on the a-chain is correct or not, and can also verify whether the transaction occurring on the B-chain is correct or not.
2) Cross-chain transaction processing using contracts
User initiates a cross-chain transaction atobtx (transaction name) in A chain
Factor of transaction
From acount a: : a1 (a 1 account on the A chain) toaccount: b: : b1 (B1 Account on chain B)
Amount:100token. token is a token for a blockchain item.
This is the case for the transaction initiated by the user.
Usera transfers a token from himself on the a1 account of the a chain to the B1 account of userb B on the B chain, the transfer amount being 100token.
First usera constructs this transaction atobtx and then signs, initiating transaction chaining.
This transaction is stored in the cross-link contract of the A-chain, and then validated by the block producer in the A-chain, if usera has sufficient money in the A-chain, if usera has the authority of the a1 account in the A-chain.
The block producer marks that the transaction is normal and votes for it if the verification is passed.
When more than 2/3 of the block producers verify and vote. That is, the transaction is performed in the cross-link contract for the A-link, deducting the 100token for the user's a1 account on the A-link.
Because the block producer of the A chain is also the block producer of the B chain, it knows that the A chain has undergone a transaction that usera is to transfer across chains. And the transaction has been validated.
A block producer initiates a cross-link transaction into the cross-link contract of the B-chain, carrying the following information.
Information element
Named atobtx transaction id;
B：b1，amount；
the block producer of the B-chain then votes for the transaction, and since at least 2/3 of the block producers are honest, more than 2/3 of the votes pass through the transaction. After the contract judges that 2/3 votes are met, a token is generated for the B1 account of the B chain. The cross-chain transaction is completed so far.
Claims (4)
1. A cross-chain transaction method, characterized by for 2 blockchains based on DPoS consensus: the 2 blockchains are blockchain a and blockchain B;2 blockchains have a common block producer;
a user in one blockchain initiates a transaction, and after the transaction is audited and voted by a blockproducer, tokens in accounts on one blockchain can be transferred to accounts of the other blockchain across chains;
the block producer can verify whether the transaction of the A chain is correct or not, and can also verify whether the transaction occurring on the B chain is correct or not;
the transaction flow is as follows:
the process by which a user on blockchain a transfers a token on account a1 of blockchain a to account B1 on blockchain B is as follows:
step 1: user initiates a transaction with the name atobtx of a cross-chain transaction in blockchain a;
elements of the transaction: account a1 on blockchain a; account B1 on blockchain B; transaction amount x;
step 2: the block producer of blockchain a verifies transaction atobtx, specifically verifies if usera has enough tokens in the a-chain and if usera has the authority of the a1 account in the a-chain;
step 3: in blockchain a, validating and voting on the transaction;
when the block producer exceeding 2/3 passes the verification and votes, executing the transaction in the cross-link contract of the block chain A, and deducting the token of the corresponding transaction amount of the user a1 account on the block chain A, namely deducting x;
step 4: a block producer initiates a cross-link transaction to a cross-link contract of block chain B, carrying the following information: named atobtx transaction id; transaction payee account number for blockchain B; a transaction token amount;
step 5: the block producer of the block chain B votes for the transaction, and after the contract judges that 2/3 of the block producer votes pass, the medal x enters the B1 account of the block chain B;
the cross-chain transaction is completed so far.
2. The cross-chain transaction method of claim 1 wherein all block producers are both block producers of blockchain a and block producers of blockchain B, both personnel involved in managing blockchain a and personnel involved in managing blockchain B.
3. A cross-chain transaction system comprising 2 blockchains and a plurality of nodes on the blockchains, each node having a corresponding account on the blockchain for storing tokens;
also included on each blockchain is a cross-link contract module; the cross-link contract module is used for auditing and voting the cross-link transaction and deducting the medal from the account number of the node or transferring the medal into the account of the node based on the cross-link transaction;
each transaction node is provided with a cross-link transaction initiating module for initiating a cross-link transaction;
implementing a cross-chain transaction using the cross-chain transaction method of any one of claims 1-2.
4. A computer readable storage medium, characterized in that the storage medium has stored thereon a computer program which, when executed by a processor, enables a cross-chain transaction according to any of claims 1-2.
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| CN111047445B (en) * | 2019-12-11 | 2023-04-07 | 深圳区块大陆科技有限公司 | Completely decentralized side chain crossing method |
| CN111010441B (en) * | 2019-12-18 | 2022-12-13 | 深圳市迅雷网络技术有限公司 | Block chain cross-chain method and system and electronic equipment |
| CN111242618B (en) * | 2020-01-08 | 2023-05-30 | 成都库珀创新科技有限公司 | Private key keeping method and device based on blockchain contract technology |
| CN111489161A (en) * | 2020-04-20 | 2020-08-04 | 北京俩撇科技有限公司 | Block chain system, registration and chain crossing method and device |
| CN111526211B (en) * | 2020-05-06 | 2023-04-14 | 杭州复杂美科技有限公司 | Asset transfer method, device and storage medium |
| CN111800463B (en) * | 2020-05-29 | 2023-04-07 | 易联众信息技术股份有限公司 | Inter-block chain cross-chain information interaction method, system, medium, equipment and application |
| CN111769948B (en) * | 2020-06-15 | 2023-06-02 | 布比（北京）网络技术有限公司 | Inter-chain interaction method, system, device and computer equipment based on block chain |
| CN112527893B (en) * | 2020-11-26 | 2022-06-07 | 暨南大学 | Safe and efficient cross-chain service operation method and system based on SGX |
| CN113065956A (en) * | 2020-12-29 | 2021-07-02 | 上海能链众合科技有限公司 | Block chain cross-chain asset transfer method |
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