CN111522829A - Method for realizing distributed lock on block chain - Google Patents
Method for realizing distributed lock on block chain Download PDFInfo
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- CN111522829A CN111522829A CN202010329756.6A CN202010329756A CN111522829A CN 111522829 A CN111522829 A CN 111522829A CN 202010329756 A CN202010329756 A CN 202010329756A CN 111522829 A CN111522829 A CN 111522829A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000013475 authorization Methods 0.000 claims abstract description 23
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/23—Updating
- G06F16/2308—Concurrency control
- G06F16/2336—Pessimistic concurrency control approaches, e.g. locking or multiple versions without time stamps
- G06F16/2343—Locking methods, e.g. distributed locking or locking implementation details
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/448—Execution paradigms, e.g. implementations of programming paradigms
- G06F9/4482—Procedural
Abstract
The invention discloses a method for realizing distributed locks on a block chain, which is characterized in that each application server is preset with a unique block chain key pair, an authorization distribution center deploys an intelligent contract on the block chain, a contract interface is called to set an authorized application server list for each type of lock, and the application server calls the contract interface to realize locking and unlocking.
Description
Technical Field
The invention relates to the technical field of distributed locks, in particular to a method for realizing distributed locks on a block chain.
Background
In the case of multi-system interaction, sometimes it is necessary to coordinate the associated operations among the systems so that the operations of the systems can be executed synchronously or mutually exclusively.
Distributed locks are one way to control the synchronous access to shared resources between distributed systems. In distributed systems, it is often necessary to coordinate their actions. If one or a group of resources are shared between different systems or different hosts of the same system, then access to these resources often requires mutual exclusion to prevent interference with each other to ensure consistency, in which case a distributed lock is used.
At present, only centralized distributed lock implementation methods such as a cache-based redis/memcached distributed lock, a database-based mysql/mssql record lock distributed lock, a zookeeper-based distributed lock, and the like are available, and no decentralized distributed lock implementation method is found.
Disclosure of Invention
The present invention provides a method for implementing distributed locks on a block chain, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a distributed lock implementation method on a block chain comprises an authorized distribution center, a plurality of application servers and an intelligent contract on the block chain, wherein each application server sets a unique block chain key pair in advance, the authorized distribution center deploys the intelligent contract on the block chain, a contract interface is called to set an authorized application server list for each type of lock, and the application server calls the contract interface to implement locking and unlocking.
As a further scheme of the present invention, the authorization distribution center may deploy an intelligent contract on the blockchain, invoke an intelligent contract interface, and maintain a list of application servers authorized by each type of lock.
As a further scheme of the present invention, a unique blockchain key pair is set in the application server, and a locking or unlocking interface of an intelligent contract on a blockchain can be called to implement locking and unlocking.
As a further scheme of the present invention, a plurality of locks classified by name are stored in the intelligent contract on the block chain, a plurality of locks identified by lock IDs may be stored in the classification, and call interfaces for maintaining lock classification, locking, unlocking, and the like are provided externally.
As a further scheme of the present invention, a specific implementation method is as follows:
s001: an intelligent contract C is deployed on a blockchain by an authorization distribution center, each application server is set as T, the application server maintains a unique key pair of the application server, and blockchain addresses corresponding to the key pair are set as T1 and T2;
s002: the authorization distribution center calls an authorization interface on the C for a certain type of lock L, the authorization interface comprises an application server address list authorized by the parameter L, and each time the authorization setting which covers the same name of the original L is called;
s003: assertion: if there is a record and the blockchain address of T is in the list, then S004 is executed, otherwise S006 is executed;
s004: c, searching a locking table according to the lock type L and the lock ID, and finding out a corresponding record R, wherein the C stores a lock type authorization table, and the record types are as follows: lock class name L, list of authorized blockchain addresses; the application server has a locking table, and the record type is as follows: the identification ID of the lock L, the lock holder address and the lock timeout time;
s005: assertion: if R does not exist, or the holder T of R exists, or the lock timeout time of R is earlier than the current time on the chain, executing S006, otherwise executing S007;
s006: the operation fails and the output ends.
S007: if R exists, deleting the R, adding records to the locking table, wherein the record content comprises ID, T address and current time on the chain;
s008: if the locking is successful, the application server executes the corresponding service logic after the locking, when the application server locks, the unique key pair of the application server is used for signing and calling the locking interface on the C, the locking interface comprises the identification ID of the lock L and the maximum locking seconds, and if the locking is successful, the locking is successful;
s009: the signature of T calls an unlocking interface on C, C searches a locking table according to the lock type L and the lock ID to find out a corresponding record R, when the application server unlocks, the signature of the unique key pair of the application server calls the unlocking interface on C, and the unlocking interface comprises the identification ID of the lock L;
s010: assertion: if R exists and the owner on R is T and the locking timeout time is later than the current time on the chain, executing S011, otherwise executing S012;
s011: deleting R, and finishing unlocking;
s012: the operation is successful and the output is finished.
Compared with the prior art, the invention has the beneficial effects that:
the invention uses the characteristics of decentralized block chain and no double flowers on the digital assets, and uses the operation of transferring all balance out through the fixed account number as locking.
Drawings
Fig. 1 is a flowchart of locking and unlocking an application server T in a method for implementing a distributed lock on a blockchain.
Fig. 2 is an implementation block diagram of a distributed lock implementation method on a blockchain.
In the figure: 1. an authorized distribution center; 2. intelligent contracts on block chains; 3. an application server.
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 method for implementing a distributed lock on a block chain includes an authorized distribution center 1, a plurality of application servers 3, and an intelligent contract 2 on a block chain;
the authorization distribution center 1 can deploy the intelligent contract 2 on the block chain, call an intelligent contract interface and maintain a list of the application servers 3 authorized by each type of lock;
a unique block chain key pair is set in the application server 3, and a locking or unlocking interface of the intelligent contract 2 on the block chain can be called to realize locking and unlocking;
a plurality of locks classified according to names are stored in the intelligent contract 2 on the block chain, a plurality of locks identified according to lock IDs can be arranged in the classification, and call interfaces for maintaining lock classification, locking, unlocking and the like are externally provided;
the method comprises the steps that a unique block chain key pair is set in each application server 3 in advance, an intelligent contract is deployed on a block chain by the authorization distribution center 1, a contract interface is called to set an authorized application server list for each type of lock, and the application server 3 calls the contract interface to lock and unlock.
The specific implementation method comprises the following steps:
s001: an intelligent contract C is deployed on a blockchain by the authorization distribution center 1, each application server 3 is set to be T, the application server 3 maintains a unique key pair of the application server 3, and blockchain addresses corresponding to the key pairs are set to be T1 and T2 respectively;
s002: the authorization distribution center 1 calls an authorization interface on the C for a certain type of lock L, the authorization interface comprises an application server address list authorized by the parameter L, and each time the authorization setting with the same name of the original L is covered;
s003: assertion: if there is a record and the blockchain address of T is in the list, then S004 is executed, otherwise S006 is executed;
s004: c, searching a locking table according to the lock type L and the lock ID, and finding out a corresponding record R, wherein the C stores a lock type authorization table, and the record types are as follows: lock class name L, list of authorized blockchain addresses; the application server 3 has a locking table, and the record types are: the identification ID of the lock L, the lock holder address and the lock timeout time;
s005: assertion: if R does not exist, or the holder T of R exists, or the lock timeout time of R is earlier than the current time on the chain, executing S006, otherwise executing S007;
s006: the operation fails and the output ends.
S007: if R exists, deleting the R, adding records to the locking table, wherein the record content comprises ID, T address and current time on the chain;
s008: if the locking is successful, the application server 3 executes the corresponding service logic after the locking, when the application server 3 locks, the unique key pair of the application server is used for signing and calling the locking interface on the C, the locking interface comprises the identification ID of the lock L and the maximum locking seconds, and if the locking is successful, the locking is successful;
s009: the signature of T calls an unlocking interface on C, C searches a locking table according to the lock type L and the lock ID to find out a corresponding record R, when the application server 3 unlocks, the signature of the unique key pair of the application server 3 calls the unlocking interface on C, and the unlocking interface comprises the identification ID of the lock L;
s010: assertion: if R exists and the owner on R is T and the locking timeout time is later than the current time on the chain, executing S011, otherwise executing S012;
s011: deleting R, and finishing unlocking;
s012: the operation is successful and the output is finished.
The invention uses the characteristics of decentralized block chain and no double flowers on the digital assets, and uses the operation of transferring all balance out through the fixed account number as locking.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A distributed lock implementation method on a block chain comprises an authorized distribution center (1), a plurality of application servers (3) and an intelligent contract (2) on the block chain, and is characterized in that each application server (3) is preset with a unique block chain key pair, the authorized distribution center (1) deploys the intelligent contract on the block chain, a contract interface is called to set an authorized application server list for each type of lock, and the application servers (3) call the contract interface to implement locking and unlocking.
2. A distributed lock implementation method on blockchain according to claim 1, wherein the authorization distribution center (1) can deploy intelligent contracts (2) on blockchain, invoke intelligent contract interfaces, and maintain a list of application servers (3) authorized by each type of lock.
3. The method for implementing distributed lock on blockchain according to claim 1, wherein a unique blockchain key pair is set in the application server (3), and a locking or unlocking interface of the smart contract (2) on blockchain can be invoked to implement locking and unlocking.
4. The method for implementing distributed locks on blockchains according to claim 1, wherein a plurality of locks classified by name are stored in the intelligent contract (2) on blockchains, a plurality of locks identified by lock IDs can be stored in the classification, and a call interface for maintaining lock classification, locking and unlocking is provided externally.
5. The method for implementing distributed locks on blockchains according to any one of claims 1 to 4, comprising the following steps:
s001: an intelligent contract C is deployed on a blockchain by an authorization distribution center (1), each application server (3) is set to be T, the application servers (3) maintain unique key pairs of the application servers, and blockchain addresses corresponding to the key pairs are set to be T1 and T2;
s002: the authorization distribution center (1) calls an authorization interface on the C for a certain type of lock L, the authorization interface comprises an application server address list authorized by the parameter L, and each time the authorization setting of the same name of the original L is covered;
s003: assertion: if there is a record and the blockchain address of T is in the list, then S004 is executed, otherwise S006 is executed;
s004: c, searching a locking table according to the lock type L and the lock ID, and finding out a corresponding record R, wherein the C stores a lock type authorization table, and the record types are as follows: lock class name L, list of authorized blockchain addresses; the application server (3) is provided with a locking table, and the record types are as follows: the identification ID of the lock L, the lock holder address and the lock timeout time;
s005: assertion: if R does not exist, or the holder T of R exists, or the lock timeout time of R is earlier than the current time on the chain, executing S006, otherwise executing S007;
s006: the operation is failed, and the output is finished;
s007: if R exists, deleting the R, adding records to the locking table, wherein the record content comprises ID, T address and current time on the chain;
s008: if the locking is successful, the application server (3) executes the corresponding service logic after the locking, when the application server (3) locks, the unique key pair of the application server is used for signing and calling the locking interface on the C, wherein the locking interface comprises the identification ID of the lock L and the maximum locking seconds, and if the locking is successful, the locking is successful;
s009: the signature calls an unlocking interface on the C, the C searches a locking table according to the lock type L and the lock ID to find out a corresponding record R, when the application server (3) is unlocked, the signature calls the unlocking interface on the C by using a unique key pair of the application server, and the unlocking interface comprises the identification ID of the lock L;
s010: assertion: if R exists and the owner on R is T and the locking timeout time is later than the current time on the chain, executing S011, otherwise executing S012;
s011: deleting R, and finishing unlocking;
s012: the operation is successful and the output is finished.
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2020
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Patent Citations (7)
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| WO2013000135A1 (en) * | 2011-06-29 | 2013-01-03 | 中兴通讯股份有限公司 | Locking method and system for distributed messages |
| US9992022B1 (en) * | 2017-02-06 | 2018-06-05 | Northern Trust Corporation | Systems and methods for digital identity management and permission controls within distributed network nodes |
| CN108564692A (en) * | 2018-04-10 | 2018-09-21 | 周伟 | A kind of unlock verification method and system for unlocking based on block chain |
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