CN109389500A - Data trade platform based on ether mill - Google Patents
Data trade platform based on ether mill Download PDFInfo
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- CN109389500A CN109389500A CN201811148017.6A CN201811148017A CN109389500A CN 109389500 A CN109389500 A CN 109389500A CN 201811148017 A CN201811148017 A CN 201811148017A CN 109389500 A CN109389500 A CN 109389500A
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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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
- G06F21/6245—Protecting personal data, e.g. for financial or medical purposes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
-
- 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
- G06Q20/389—Keeping log of transactions for guaranteeing non-repudiation of a transaction
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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 proposes a kind of data trade platforms based on ether mill, including data providing (seller) and data party in request (buyer).Ether mill is the public block platform chain with intelligent contract function an of open source, data providing and data party in request are added in the bottom ether mill platform of transaction platform by ether mill node, user both sides complete process of exchange by intelligent contract in the platform of ether mill by the ether mill node of operation oneself.Data trade platform realizes the formulation of trading rules by the intelligent contract of ether mill platform, and data providing passes through the description information of data provided by intelligent contract registration, and saves it on block chain；By in intelligent contract inquiry current platform, chartered data information, the data for selecting oneself desired have been traded for data requirements side；Buyer, seller both sides pass through intelligent contract and complete transaction flow.Data trade platform introduces storage system of the IPFS system as source data, and IPFS is a point-to-point distributed version file system, it provides great memory space, the speed of download being exceedingly fast is possessed between node, while ensure that the safety of data.Due to the decentralization of block chain, anonymity, can not distort the characteristics of, data trade platform of the invention does not have third party's control mechanism, solves the safety problem of transaction data storage, it ensure that the individual privacy safety of participating user, and transaction record is persistence, data trade platform has trackability.
Description
Technical field
The invention belongs to Internet technical fields, are related to a kind of data trade platform, more particularly to based on block chain and
The data trade platform of IPFS.
Background technique
In recent years, it was produced with the high speed development of internet with the popularization and application of information technology, various industries and mechanism
Raw data are in explosive increase, but while data volume increases in geometric progression, large enterprise to the monopolization of data and
The case where inter-agency information island, also urgently breaks office." data exchange is got up ", this contains huge production efficiency behind and mentions
Between lift-off and commercial value, data trade market is then produced.
Currently, system of the domestic data transaction platform according to function and positioning, platform operation management and relationship trading rule
Condition of pledging love can simply be divided into two classes: one kind is as the third party intermediary in process of exchange, and positioning is data providing
With the intermediary of data party in request, function only provides the place of transaction than more visible, and data providing uploads data to third party
Platform, data requirements person inquire data and acquisition of paying a price by third-party platform；Another kind of transaction platform is more
For user provide processing data service, this kind of platform often and data owner, technology platform cooperation, to initial data into
Row cleaning, desensitization, processing eventually point to specific application scenarios or form visual data product.Both types
The division limits of platform are not that completely explicitly, many transaction platforms are the integration of the two, only building in business platform
In give priority to.
Since these data trade platforms have the behavior of " data precipitating ", i.e. original data transaction platform itself is that do not have
Data, by acting as the agent of the data of data source, as soon as selling a caching, slowly form a fairly large caching
Database.This behavior, will lead to and serious leaking data problem occurs, and the awareness of safety of many data trade platforms is relatively thin
Weak, cache database is easy to be stolen by hacker, causes leaking data.
Summary of the invention
The purpose of the present invention is to propose to the data trade platforms based on ether mill, provide a guarantee data-privacy and peace
Entirely, the data trade platform for protecting individual privacy, decentralization protects the data safety and privacy letter of data trade participant
Breath, while transaction record can not be distorted and be can be traced.
In order to solve the above technical problems, as shown in figure, data trade platform provided by the invention includes participating in business
User node and block catenary system module (ether mill), data transmission module (IPFS), control module (Node.js)；With
Too in the platform of mill complete user node between transaction with communicate and records transaction, pass through IPFS completion data transmit, use
Node.js provides the user with the environment of operation trading activity.
The block catenary system module uses ether mill platform building, and the user to participate in business is connected by ether mill node
Into ether mill network, transaction is completed in ether mill, is divided into two parts of block chain trade mode and intelligent contract.
Transaction in block catenary system, can not be distorted using block chain and the characteristics of decentralization realizes and trades between user
It the persistence of record and can not distort, while solve the problems, such as platform deposition data:
A) can not distort: in block catenary system module, transaction record will be written in chain for every primary transaction of generation, and
Rewriting can not be distorted.This is because the cryptographic Hash of previous piece of content piece is stored with each of in block chain, if there is any
The content of block is tampered, and all pieces of cryptographic Hash can also change correspondingly after the block being tampered, we are just easy to detect in this way
Whether each piece of block chain is tampered out.So the record of each transaction in data trade platform is all stored in block
On chain, and these transaction records can not be distorted.
B) decentralization: block catenary system is exactly point-to-point connection, and centre is not necessarily to third-party server, arbitrary node
Rights and duties be all it is impartial, data block in system is safeguarded jointly by the node in whole system with maintenance function.
Block catenary system only records the description information and transaction record of transaction data collection, and the data set hash for transaction is closed by intelligence
About it is transmitted directly to data requirements person.Therefore data trade platform is to provide one as intermediary for the user to participate in business
The mechanism or database of centralization are not present in platform for transaction place, and platform itself does not store deposition data.
Intelligent contract in block catenary system module, for formulating the trading rules of data trade platform, intelligent contract is permitted
Perhaps credible transaction is carried out in no third-party situation, these transaction are traceable and irreversible.It is flat in the data trade
In platform, both parties complete the process of transaction by the intelligent contract in ether mill.It is write used here as Solidity language
Then contract code compilation is ether mill bytecode, and bytecode is deployed to by service logic/application code (intelligent contract)
On block chain.In the data trade platform, the contract function of three parts has been write here:
A) data set registration function: data set provider is uploaded by calling the function interface according to the format that platform defines
The description information of provided data set.
B) it trades function: being traded between user using the Pattern completion of order, the model of order is defined in module, from building
Process of the vertical order to confirm an order, lock order, completion order.
C) data transfer function: the hash value that data are uploaded to IPFS acquisition is uploaded to intelligent contract by data set provider,
Data requirements person is obtained by the function.
Further, data transmission module of the present invention is the transmission in order to solve large data files, ether mill pair
There are problems that two in the transmission of large data file: first is that storing on ether mill big due to block chain limited storage space
Type data set is sufficiently expensive, and each transaction in ether mill all can calculate service charge gas, the number of a 256kb according to size of data
It can reach 7599992 (0.3 ether coin, i.e. 188 dollars of current market value) according to service charge；Second is that due to the limit of ether mill virtual machine
System, the gas that a block can be used has the upper limit, this value is that 7984452 (0 byte consumes 4 gas, and non-zero byte disappears
68 gas are consumed, each transaction will pay 21000 gas), once gas exceeds the upper limit, transaction can not be created, is computed
It is out more than that the data of 256kb can not just create transaction.Storage system of the present invention using the IPFS of decentralization as data file
System, the file content of upload is calculated a hash value by hash algorithm by IPFS, by the hash value in distributed hashtable
In inquire this document and download；The present invention is by the bottom block catenary system ether of the API of IPFS and data trade platform
Mill connection, data set provider obtains hash value by the way that data are uploaded to IPFS, using the point-to-point transmission of ether mill to data
Demander, data requirements person obtains hash value, and downloads source data by IPFS.
The control module of the data trade platform is for providing the user with convenient operating environment, control module selection
Node.js environmental structure.It is connect using the web3 module in Node.js with ether mill platform, is mentioned using web3.js library
The web3 object of confession goes to realize the control to trading activity.In bottom layer realization, it is called logical with local ether mill node by RPC
Letter, web3.js can be connect with any ether mill node for exposing RPC interface, so as to interact with ether mill.Into friendship
The user of easy platform removes the ether mill node for being connected to oneself by the web3 object of oneself, after successful connection, uses Node.js
JavaScript environment trading activity of the ether mill node of oneself in the platform of ether mill is operated, pass through
JavaScript console carries out command operation.
Meanwhile the present invention uses watch () method by web3 object, has write one section of code to defining in intelligent contract
Transaction event monitored；The transaction of each step of transaction flow occurs in the platform of bottom ether mill, the user to participate in business
It will be listened in real time by web3 object, real-time operation is carried out to transaction event.
It is as follows that the data provider registration uploads the step of data set information:
A) the data information format that user defines according to platform assembles provided data set description information, passes through ether
Mill node calls intelligent contract to upload data set information.
B) intelligence contract in ether mill carries out data record, and data set information is stored in contract memory space, every a upload
Information can be identified by a sequence number ID, to inquire, and data set information of every upload, ether mill can basis
Common recognition algorithm (proof of work) digs the raw new block of mineral products.
The step of data requirements person carries out data query and initiates transaction is as follows:
A) user calls intelligent contract query interface by ether mill node, inquires chartered data set information at present
B) intelligent contract is according to function performance, according to sequence number ID sequence successively returned data collection information
C) for user-selected number according to collection, universal intelligent contract establishes the function interface of trade order, selects data set serial ID
Initiate transaction.
The step of both parties trade is as follows:
A) the sequence number ID for the data set that data requirements person (buyer) selection can be checked establishes order.
B) after establishing order, then 2 times of assets of buyer's payment data collection price confirm an order to intelligent contract account
(malice buyer does not confirm the behavior received to 2 times of assets of payment in order to prevent).
C) data set provider (seller) listens to acknowledgement of orders message, sends data hash to intelligent contract.
D) buyer listens to the message of data transmission, obtains hash value by intelligent contract.
E) buyer downloads file data by IPFS node and verifies, and after verifying is errorless, triggering confirms function of receiving.
The assets of data set price are sent to seller's account, surplus assets return buyer's account by f) intelligent contract unlocking account
Family, transaction are completed.
It advantages of the present invention and has the beneficial effect that:
1. due to the decentralization of block chain, can not distort the characteristics of, data trade platform provided by the invention solves often
The problem of data buffer storage seen, realizes point-to-point transaction between user, and transaction record persistence, can not distort and can
Retrospect.
2. due to block chain anonymity the characteristics of, protect the individual subscriber privacy information participated in business.
3. the storage and downloading of data are completed using IPFS, due to the distributed file system characteristic and block chain skill of IPFS
Art feature, speed of download are exceedingly fast, and memory space is cheap, while improving the safety of data storage.
Detailed description of the invention
The framework of data trade platform of the Fig. 1 based on ether mill；
Fig. 2 data trade platform service stream；
Fig. 3 data trade platform user transaction flow；
Fig. 4 data trade platform user controls environment；
The demonstration of Fig. 5 data trade platform data supplier's registration data set；
The demonstration of Fig. 6 data trade platform data transmission module；
The transaction demonstration of Fig. 7 data trade platform；
Specific embodiment
Below in conjunction with attached drawing, the invention will be further described:
It is illustrated in figure 2 a kind of business process map of data trade platform based on ether mill of the present invention, is such as schemed
Shown, in data trade platform after the completion of intelligent contract deployment, participating user goes to complete the transaction of data, tool according to operation flow
Steps are as follows for body:
Step 201: going down to formulate the rule and transaction of transaction platform at us firstly the need of the ether mill environment created
Logic, by writing intelligent contract and being deployed on block chain.
Step 202: data set provider user A is added in the data trade platform, it is desirable to which the data for selling oneself pass through
Ether mill node calls intelligent contract to carry out the registration that data set sells information, including data set size, data set type, data
Collect description, data set price, account address etc..After user completes data set information registration, all nodes of the private network
The node for being added to the private network later can inquire the information of the data set by intelligent contract, to go to select
Whether buy.
Step 203: data requirements person user B is added in the data trade platform, can be inquired by intelligent contract
On current block chain in other words in Data Market, all data set informations for having registered sale are therefrom selected one by one.
Step 204: user B has selected the data set of desired purchase in numerous data sets, by the id of the data set, adjusts
It initiates to trade with intelligent contract, creates a trade order, first payment amount is locked into intelligent contract, then according to rule
It then completes to trade.
Step 205: after user B initiates transaction and payment amount, user A can listen to the event information of transaction request.
After the information for confirming monitoring event, the data set of sale is uploaded in IPFS and gets hash value by user A.
Step 206: the hash value of data set is sent to user B by intelligent contract by user A.
Step 207: user B gets the data hash value of user A transmission by intelligent contract, and is existed by the hash value
Downloading data collection in IPFS.
Step 207: after user's B validation data set is errorless, being received by the confirmation of intelligent contract.
Step 209: intelligent contract receive user B acknowledge receipt of really goods request after, will lock into data in the amount of money in contract
The amount of money of collection price pays user A, remaining to return to user B, and transaction is completed.
Shown in Fig. 3, for the transaction flow figure that contract intelligent in data trade platform of the invention is write, Contracts Definitions one
A order status variable, each step is carried out by restrictive condition of order status during transaction, and user can look into real time
Ask order status, altogether there are four state: NULL, Created, Locked, Inactive, order status with transaction progress
And change.
Step 301: it does not trade when occurring, order status NULL；
Step 302: when a user A selection data set initiates transaction, creating order, order status becomes
Created；
Step 303: when order status is Created, user A confirmation is bought and is paid, contract lockout amounts, order status
Become Locked；
Step 304: user B (data seller) can automatically receive the monitoring information of confirmation purchase events, and confirmation has other
User has purchased the data set of oneself, and order status is still Locked
Step 305: the data set hash of oneself is uploaded in intelligent contract by user B, and order status is still Locked
Step 306: user A automatically receives the monitoring event information of data upload, is then got by intelligence contract
Data hash value, order status are still Locked
Step 307: user A downloads the data set by IPFS using the hash value got, and after verifying is errorless, confirmation is received
Goods, order status become Inactive
Step 308: intelligent contract activation, the amount of money that will be locked in contract send the amount of money for being equal to data set price
To the account of user B, residual amount returns the account of user A
Step 309: transaction is completed, and order status becomes NULL.
Fig. 4 show JavaScript console interface, and user operates ether mill nodes ' behavior by the environment,
As shown in the figure to create private account and check present node account, user can call intelligent contract in the present context, realize and turn
Account uploads the operations such as data, transmission data.
Shown in Fig. 5, data set provider calls intelligent contract to upload data set type, number respectively in JavaScript console
According to data set informations such as collection size, data set description, data set price, account addresses.
Shown in Fig. 6, data set provider opens the service of local IPFS node, uploads data to IPFS node, is based on
The hash value that file content calculates；In process of exchange, data set provider sends hash to data requirements person, and data requirements person is logical
It crosses local IPFS node downloading data file and verifies.
Fig. 7 show the demonstration of transaction, and data set provider (seller) primary account possesses 10 ether, and (ether is that ether mill is flat
The token of platform) assets, seller complete data set registration after, data requirements person (buyer) by inquiry it can be seen that seller institute on
The data set information of biography, price are 30 ether；Buyer selects serial number to establish order, confirms an order and pays 60 ether coin to intelligence
Contract account；Seller listens to the message of acknowledgement of orders, and data hash value is sent to intelligent contract；Buyer listens to data transmission
Message, by intelligent contract obtain hash value, and by local IPFS node download file data, verify it is errorless after, confirm
It receives；30 ether are sent to buyer's account by intelligent contract, and surplus assets, which are returned, gives buyer's account, can inquire buyer's account money
Producing finally is 40 ether.
The above embodiment is interpreted as being merely to illustrate the present invention rather than limit the scope of the invention.?
After the content for having read record of the invention, technical staff can be made various changes or modifications the present invention, these equivalent changes
Change and modification equally falls into the scope of the claims in the present invention.
Claims (6)
1. a kind of data trade platform based on ether mill, it is characterised in that: the participating user of the data trade platform includes
Data set provider and data demander, the two complete transaction and communication, the data by transaction platform bottom block catenary system
Transaction platform includes three big modules:
Block catenary system module, the module are using first floor system of the ether mill platform as data trade platform, and data provide
The transaction flow of person and data requirements person are completed in the platform of ether mill；The module is divided into ether mill node and intelligent contract
Two parts: intelligent contract establishes the trading rules of data trade platform；Each user can create the ether mill an of local
Node realizes the interaction with intelligent contract, and the communication between other users, while ether by the ether mill node
Mill node is by calling intelligent contract to complete the transaction between user in the network of ether mill；
Data transmission module, the module are used to store and send the initial data of transaction data collection；The module uses IPFS
(InterPlanetary File System) dissemination system stored as a file, when data set provider is by provided data set
It is uploaded to IPFS node, is just obtained based on the calculated unique encryption cryptographic Hash of this document content, data requirements person can be by this
Hash value downloading data；
Transaction platform control module, the mode are that the user (both parties) to participate in business provides an operation trading activity and prison
The environment of transaction event is listened, which is realized using Node.js；User is put down by the web3 module in Node.js with ether mill
Platform connection, the web3 object provided using web3.js library, so that it may in the JavaScript console of Node.js
The trading activity of oneself node is controlled；The present invention by the web3 module of Node.js write code realize to trade into
The real-time monitoring of journey, user can in JavaScript console real-time reception to monitoring information.
2. a kind of data trade platform according to claim 1, it is characterised in that: block catenary system have can not distort and
The characteristics of decentralization, data set provider and data demander are completed to trade by ether mill node in the platform of ether mill
Journey, the data trade platform have the following characteristics that
A) each step process of data trade is exactly transaction on a block chain between both parties, each time on block chain
Transaction, ether mill can dig the raw new block of mineral products by common recognition algorithm, and the data record that this time transaction generates is got off to be put into
In block, once information permanent will be stored by verifying and being added to block chain；Unless can simultaneously control system
In be more than 51% node, be otherwise invalid to the modification of database on individual node；Therefore the data of data trade platform
Stability and reliability are high, and the transaction record between user can not be distorted and be can be traced；
B) since block catenary system uses distributed structure/architecture, there is no the hardware of centralization or management organization, the power of arbitrary node
Benefit and obligation be all it is impartial, point-to-point transaction is realized between user, without third party intermediary, eliminates third party's machine
Structure is data cached and the security risk of leak data.
3. a kind of data trade platform according to claim 1, it is characterised in that: in data trade platform, data
Transmission is completed by IPFS and intelligent contract；The step of data are transmitted is as follows:
A) data set provider (seller) enters platform operating environment, and platform bottom is locally created an IPFS node in seller and opens
Dynamic service, seller select the file uploaded, and platform uploads to this document in local IPFS node, and seller can obtain based on text
The calculated unique encryption hash value of part content；Hash value directly reflects the content of file, even only modify 1 bit, hash value
It also can be entirely different；
B) module monitoring is monitored when seller passes through through intelligent contract during ether mill platform is traded by both parties
After proceeding to trade confirmation to transaction flow, seller passes through intelligent contract and uploads data hash value to block catenary system；
C) data requirements person (buyer) gets the data hash value of upload, the local established using platform by intelligent contract
When IPFS node requests this document hash, it will use a distribution hash table and finds node where file, fetch file
And verify file data.
4. a kind of data trade platform according to claim 1, it is characterised in that: data trade platform uses Node.js
The operating environment of environmental structure user, user node are connect by the web3 module of Node.js with ether mill node,
JavaScript console operates trading activity using web3 object.
5. a kind of data trade platform according to claim 1, it is characterised in that: in transaction platform, data set provider
It is monitored in real time with process of the data demander to transaction, to obtain newest stateful transaction, platform uses web3.js
The web3 object that library is provided is completed；In bottom layer realization, it is called and ether mill node connection communication by RPC；In web3
Eth object-web3.eth specifically to indicate interaction between the block chain of ether mill；Write code and by web3 object
Wacth () method realizes the real-time monitoring to transaction event.
6. a kind of data trade platform according to claim 1, it is characterised in that: during data trade, data are provided
Trading activity between person and data demander is all to follow the rule of ether mill intelligence contract formulation, and both parties follow intelligence
The logic that contract is write is completed to establish each step process terminated to transaction from transaction；It is compiled used here as Solidity language
Service logic/application code (intelligent contract) is write, is then ether mill bytecode by contract code compilation, and bytecode is disposed
Onto block chain；Intelligent contract permission carries out credible transaction in no third-party situation, these transaction are traceable and can not
It reverses.
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| CN201811148017.6A CN109389500A (en) | 2018-09-29 | 2018-09-29 | Data trade platform based on ether mill |
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| CN201811148017.6A CN109389500A (en) | 2018-09-29 | 2018-09-29 | Data trade platform based on ether mill |
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