CN110288339A - A kind of second-hand mobile phone busines sinformation processing/system and method based on block chain - Google Patents
A kind of second-hand mobile phone busines sinformation processing/system and method based on block chain Download PDFInfo
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- CN110288339A CN110288339A CN201910376379.9A CN201910376379A CN110288339A CN 110288339 A CN110288339 A CN 110288339A CN 201910376379 A CN201910376379 A CN 201910376379A CN 110288339 A CN110288339 A CN 110288339A
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Abstract
The invention belongs to digital information transmission technical fields, disclose a kind of second-hand mobile phone busines sinformation processing/system and method based on block chain, mobile phone is carried to agency and carries out testing machine by the second-hand mobile phone exchange information processing method seller based on block chain, and administrator saves the information for machine of testing to block chain network by cellphone information contract；True cellphone information is saved to block chain network again and is checked for buyer.The present invention shares account book using block chain and stores second-hand cellphone information, ensure that information publicity, can not tamper and safety；The trust problem of the point-to-point transaction of both parties is solved using block chain+intelligence contract.Different from the mechanism of the complete decentralization of bit coin in terms of the point-to-point transaction of both parties, the present invention disposes token contract by administrator's account, possesses the permission of account executive, solving the problems, such as to trade in block chain network to a certain extent can not manage.
Description
Technical field
The invention belongs to digital information transmission technical fields more particularly to a kind of second-hand mobile phone based on block chain to trade and believe
Cease processing system and method.
Background technique
As the rapid development of internet industry, traditional industries carry out what industrial structure upgrading was combined with internet one after another
Main trend, second-hand mobile phone online transaction are becoming increasingly popular.Second-hand mobile phone trading industry mostly uses greatly the software of centralization now
Structural model, cause so second-hand mobile phone trading industry there are both parties' information asymmetry, mobile phone itself quality lack guarantee,
Many drawbacks such as process of exchange fraud conditions are serious.
Block chain is a kind of distributed account book, it forms block by being constantly packaged newest transaction to extend chain.Area
All nodes may be connected on network in block chain, and realizes and freely send transaction, and new area is traded and be packaged to mutual authentication
Block.Block chain technique functions are derived from the founder paper " a kind of bit coin: point-to-point electronic cash system " that middle acute hearing is delivered, block
Chain technology is to verify to know together algorithm with storing data, using distributed node to generate and more using encryption chain type block structure
New data is programmed and the completely new decentralization architecture and distributed computing model of one kind of operation data using scripted code
Formula.
Ether mill is the block catenary system an of decentralization.It introduces the function of intelligent contract (smart contract)
Can, greatly extend the thought of bit coin.By block chain from currency application extension to various application aspects.Ether coin
(Ether): ether coin is the currency in ether mill, is similar to bit coin, but ether coin Ether is very big unit in fact, with
The minimum monetary unit of too coin is wei, their conversion relation are as follows: 1Ether=10^18wei.Account: in ether mill, often
One wallet can not have to create an account at local, and be traded by controlling different accounts, each in ether mill
A account all corresponds to a determining address.Transaction: each account can voluntarily broadcast transaction, can also pass through intelligent conjunction
It about trades, the data of transaction are jointly processed by by the whole network.
Summary of the invention
In view of the problems of the existing technology, at the present invention provides a kind of second-hand mobile phone Transaction Information based on block chain
Manage system and method.
The purpose of the present invention is being combined block chain with the transaction of second-hand mobile phone, to solve second-hand mobile phone trading industry dealing
The problems such as two-sided information is asymmetric, mobile phone quality itself lacks guarantee, process of exchange fraud conditions are serious.
To achieve the goals above, the present invention includes:
The first step, seller are registered using the light client metamask in ether mill, and the account of ether mill network is obtained after registration
Address；Administrator disposes cellphone information contract；Administrator updates web platform；Buyer has after purchase intention in block chain network
Registration；Buyer buys ether coin with currency, and buys token by token contract ether coin；
Second step, buyer access web platform, first pass through mobile phone fixed information and select mobile phone, to further check mobile phone
Variable information can input IEMI in web platform and pass through cellphone information contract inquiry mobile phone variable information；Buyer someone buys hand
Machine trades contract after receiving the token that buyer sends to contract, and state variable isReceiveMoney becomes true, and informing is sold
Family's delivery；
Third step, after forming payment wish, buyer fills in the shipping address information of oneself, and to transaction contract send with
Evaluate equal fund, seller delivers at this time, which can call function to take out after the stipulated time by seller, and seller takes out money
It is buyer that contract of trading when golden, which will modify owner's information,；Seller sends mobile phone to buyer, can after the contract stipulated time of trading
Function is called to take out the token in contract, intelligence contract modification owner's information is buyer when token is removed；
4th step, buyer receive mobile phone, and transaction terminates；It sells household token and exchanges ether coin to token contract.
Further, it includes: IMEI, historical trading, repair message, appraisal letter that the administrator, which will test the resulting information of machine,
Breath, owner's information are saved by cellphone information contract to block chain network；
Administrator disposes cellphone information contract, and the account address for only disposing contract just has permission and calls the contract；
Cellphone information contract includes 3 functions, is respectively: by the addPhoneinfo letter of information preservation to block chain network
Number, the updatePhoneinfo function for updating the information saved, the getPhoneinfo function for reading the information saved.
Further, the web platform includes: pattern, memory, color, the IEMI of mobile phone；Variable information inquires column, user
The exclusive identification code of input handset.
Further, a shape is set in the transaction contract of the second-hand mobile phone exchange information processing method based on block chain
State variable isReceiveMoney, if contract receives the token of buyer's transmission, which becomes true；
The seller of the second-hand mobile phone exchange information processing method based on block chain calls in transaction contract
TakeMoney function takes out token, and updatePhoneinfo function will be called to modify owner's information inside the function.
Seller calls the sell function in token contract, and token is sold to token contract account, obtains ether coin.
Further, the buyer of the second-hand mobile phone exchange information processing method based on block chain calls token contract
Buy function buys token with ether coin；
The getPhoneinfo function of calling mobile phone information contract reads cellphone information；
When transferring accounts to transaction contract, addition remark information is the shipping address of oneself.
Further, the token contract concrete function packet of the second-hand mobile phone exchange information processing method based on block chain
It includes: trading function；Change token contract deployer；Frozen Account；Token additional issue；The exchange of token and ether coin；
The cellphone information contract of the second-hand mobile phone exchange information processing method based on block chain includes:
Mobile phone IEMI, mobile phone variable information are stored in the storage of intelligent contract；Pass through function call, input handset
IEMI returns to mobile phone variable information.
Another object of the present invention is to provide the second-hand mobile phone Transaction Information processing described in a kind of execution based on block chain
The second-hand mobile phone busines sinformation processing/system based on block chain of method, at the second-hand mobile phone Transaction Information based on block chain
Reason system includes:
Vendor information management module obtains ether mill network for the light client metamask registration in ether mill after registration
Account address；Dispose cellphone information contract；After receiving the token that buyer sends to contract, state variable
IsReceiveMoney becomes true, informs that seller can deliver；Mobile phone is sent to buyer, after the contract stipulated time of trading
Callable function takes out the token in contract, and intelligence contract modification owner's information is buyer when token is removed；With token to generation
Coin contract exchanges ether coin；
Bidder Information management module buys ether coin, and use by token contract for registering in block chain network
Ether coin buys token；Pass through cellphone information contract inquiry mobile phone variable information；Fill in the shipping address information of oneself, and to
Contract of trading sends the fund equal with appraisal；
Token contract module, for defining platform transaction token used；
Cellphone information contract module for cellphone information to be saved in block chain, and provides function access each hand
The variable information of machine；
Transaction contract module, for arranging the process of both parties' transaction, buyer calls transaction contract when buying mobile phone, defeated
Enter IEMI, shipping address, and to contract bill payment token.
Another object of the present invention is to provide the second-hand mobile phone Transaction Information processing described in a kind of realize based on block chain
The information data processing terminal of method.
Another object of the present invention is to provide a kind of computer readable storage mediums, including instruction, when it is in computer
When upper operation, so that computer executes the second-hand mobile phone exchange information processing method based on block chain.
In conclusion advantages of the present invention and good effect are as follows: existing second-hand mobile phone transaction platform buyer's vendor information
Barrier is excessively high, and seriously ` is not symmetrical for buyer's vendor information.Block chain can be used to record by the whole network public affairs as a kind of distributed account book
The information recognized, possess centrality, can not tamper, the characteristics such as programmability, safety, if can be by true cellphone information
It is saved in block chain network, second-hand mobile phone transaction is realized with automatized script code (intelligent contract), two will be greatly increased
Fairness, the publicity, safety of hand mobile phone trading industry.
The present invention shares account book using block chain and stores second-hand cellphone information, ensure that the publicity of information, can not distort
Property and safety；Both parties' point is solved using block chain+intelligence contract (cellphone information contract+token contract+transaction contract)
To a trust problem for transaction.It is different from the mechanism of the complete decentralization of bit coin in terms of the point-to-point transaction of both parties, this
Invention disposes token contract by administrator's account, possesses the permission of account executive, is solved to a certain extent in block chain
The problem of transaction can not manage on network.
Detailed description of the invention
Fig. 1 is the structural representation of the second-hand mobile phone busines sinformation processing/system provided in an embodiment of the present invention based on block chain
Figure；
In figure: 1, vendor information management module；2, Bidder Information management module；3, token contract module；4, cellphone information
Contract module；5, transaction contract module.
Fig. 2 is the second-hand mobile phone exchange information processing method flow chart provided in an embodiment of the present invention based on block chain.
Fig. 3 is the second-hand mobile phone exchange information processing method implementation process provided in an embodiment of the present invention based on block chain
Figure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
For between second-hand mobile phone trading industry buyer seller, there are problem of information asymmetry, (only seller knows hand
Quality condition, service condition of machine etc., and buyer can only just will appreciate that by seeking advice from seller).The present invention first tests mobile phone
Machine (purpose: obtaining mobile phone real information, such as battery use information, mobile phone quality information, historical transactional information) again will be true
Cellphone information is saved to block chain network and is checked for buyer, then the information barrier that second-hand mobile phone trading industry will be weakened significantly,
Promote the just disclosed progress of justice of exchange.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
As shown in Figure 1, the second-hand mobile phone busines sinformation processing/system provided in an embodiment of the present invention based on block chain includes:
Vendor information management module 1 obtains ether mill network for the light client metamask registration in ether mill after registration
Account address；Dispose cellphone information contract；After receiving the token that buyer sends to contract, state variable
IsReceiveMoney becomes true, informs that seller can deliver；Mobile phone is sent to buyer, after the contract stipulated time of trading
Callable function takes out the token in contract, and intelligence contract modification owner's information is buyer when token is removed；With token to generation
Coin contract exchanges ether coin.
Bidder Information management module 2 buys ether coin, and pass through token contract for registering in block chain network
Token is bought with ether coin；Pass through cellphone information contract inquiry mobile phone variable information；The shipping address information of oneself is filled in, and
The fund equal with appraisal is sent to transaction contract.
Token contract module 3, for defining platform transaction token used.
Cellphone information contract module 4 for cellphone information to be saved in block chain, and provides function access each hand
The variable information of machine.
Transaction contract module 5, for arranging the process of both parties' transaction, buyer calls transaction contract when buying mobile phone,
IEMI, shipping address are inputted, and to contract bill payment token.
As shown in Fig. 2, the second-hand mobile phone exchange information processing method provided in an embodiment of the present invention based on block chain includes
Following steps:
S201: seller is registered using the light client metamask in ether mill, the account of ether mill network is obtained after registration
Location；Administrator disposes cellphone information contract；Administrator updates web platform；Buyer infuses in block chain network after having purchase intention
Volume；Buyer buys ether coin with currency, and buys token by token contract ether coin；
S202: buyer accesses web platform, first passes through mobile phone fixed information and selects mobile phone, to further check that mobile phone can
Become information, IEMI can be inputted in web platform and pass through cellphone information contract inquiry mobile phone variable information.Buyer someone buys mobile phone,
Contract trade after receiving the token that buyer sends to contract, state variable isReceiveMoney becomes true, informs seller
It can deliver；
S203: after forming payment wish, buyer fills in the shipping address information of oneself, and sends and estimate to transaction contract
The equal fund of valence, seller delivers at this time, which can call function to take out after the stipulated time by seller, and seller takes out fund
When transaction contract will modify owner's information be buyer；Seller sends mobile phone to buyer, adjustable after the contract stipulated time of trading
The token in contract is taken out with function, intelligence contract modification owner's information is buyer when token is removed；
S204: buyer receives mobile phone, and transaction terminates；It sells household token and exchanges ether coin to token contract.
Application principle of the invention is further described with reference to the accompanying drawing.
As shown in figure 3, the second-hand mobile phone exchange information processing method provided in an embodiment of the present invention based on block chain includes
Following steps:
One, seller
Seller have sell mobile phone wish after, mobile phone is carried to agency and carries out testing machine, can staff help under into
Row block chain network is registered or oneself is registered in advance.Seller is registered using the light client metamask in ether mill, after registration
Obtain the account address of ether mill network.Administrator need to save the block chain network account address of seller.
Administrator will test the resulting information of machine: IMEI, historical trading, repair message, valuation information, owner's information etc., lead to
Cellphone information contract is crossed to save to block chain network.Administrator carries out signature cellphone information contract, and only sealed contract contract
Account address just have permission call the contract.Cellphone information contract mainly includes 3 functions, is respectively: addPhoneinfo
Function, updatePhoneinfo function, getPhoneinfo function, their function are by information preservation to block chain respectively
Network updates the information saved, reads the information saved.
Administrator updates web platform, and web content of platform is divided into two parts, first part: the immutable letter of each mobile phone
Breath, such as: mobile phone pattern, memory, color, IEMI；Second part: variable information inquires column, unique mark of user's input handset
Know code, click inquiry button for calling mobile phone information contract, return the historical transactional information of special handset, history repair message,
Owner's information, valuation information etc., web platform make of html+css+javascript.
If someone buys mobile phone, contract is traded after receiving the token that buyer sends to contract, state variable
IsReceiveMoney becomes true, informs that seller can deliver.A state variable is set in transaction contract
IsReceiveMoney, if contract receives the token of buyer's transmission, which becomes true.
Seller sends mobile phone to buyer, and callable function takes out the token in contract after the contract stipulated time of trading,
Intelligence contract modification owner's information is buyer when token is removed.Seller calls the takeMoney function in transaction contract to take out
Token will call inside the function updatePhoneinfo function to modify owner's information.
It sells household token and exchanges ether coin to token contract.Seller calls the sell function in token contract, and token is sold
Token contract account is given, to obtain ether coin.
Two, buyer
Buyer registers in block chain network after having purchase intention.
Buyer buys ether coin with currency, and buys token by token contract ether coin.Buyer is by calling generation
The buy function of coin contract buys token with ether coin.
Buyer accesses web platform, first passes through mobile phone fixed information, such as pattern, color, memory, IEMI, carries out selecting hand
Machine can input IEMI in web platform and pass through calling mobile phone information contract to further check mobile phone variable information
GetPhoneinfo function reads cellphone information, can inquiry mobile phone variable information.
After forming payment wish, buyer fills in the shipping address information of oneself, and sends and appraisal phase to transaction contract
Deng fund, seller delivers at this time, which can call function to take out after the stipulated time by seller, and seller hands over when taking out fund
It is buyer that easy contract, which will modify owner's information,.
When transferring accounts to transaction contract, addition remark information is the shipping address of oneself.
Mobile phone is received, transaction terminates.
Three, token contract
Token contract is used to define platform transaction token used, and concrete function includes:
Trading function；
Change token contract deployer；
Frozen Account；
Token additional issue；
The exchange of token and ether coin；
The necessity of token contract: being convenient for Admin Administration, and administrator can check the balance information of all accounts, and
It can freeze violation account.Each transaction that buyer buys token is all recorded on block chain, can not be distorted.
Four, cellphone information contract
Cellphone information contract is used to for cellphone information being saved on block chain, and each mobile phone of function access is provided can
Become information, concrete function includes:
Mobile phone IEMI, mobile phone variable information are stored in the storage of intelligent contract, that is, have been stored on block chain.
Mobile phone variable information can be returned by function call, input handset IEMI.
The necessity of cellphone information contract: second-hand cellphone information is stored in ensure that on block chain data safety and
Can not tamper, cellphone information cochain is greatly reduced into the information asymmetry between buyer seller, can promote transaction public affairs
It is flat to carry out.
Five, transaction contract
Transaction contract is used to arrange the process of both parties' transaction, and buyer calls transaction contract, input when buying mobile phone
IEMI, shipping address, and to contract bill payment token.Shipping address is sent to seller by transaction contract at this time, notifies seller
Delivery.Contract starts timing at this time, and buyer can use away the fund (Cancelling Transaction) in contract at the appointed time, and if only if reaching
When to the stipulated time, seller can call function to take fund away, and when fund is removed, intelligence contract just modifies mobile phone owner letter
Breath is buyer.The major function of transaction contract are as follows: (1) read the IEMI and valuation information saved in cellphone information contract；(2) it presses
It trades according to the content of contract agreement, protects the transaction security of both parties.
The present invention solves the second-hand serious asymmetry problem of mobile phone trading industry information using block chain+intelligence contract；Pass through
Second-hand cellphone information is saved in block chain network by intelligent contract, and is read by intelligent contract；Pass through intelligent contract (token
Contract+transaction contract) complete the point-to-point transaction of buyer seller；It is complete with bit coin in terms of the point-to-point transaction of both parties
The mechanism of decentralization is different, and the present invention disposes token contract by administrator's account, possesses the permission of account executive, certain
Solving the problems, such as to trade in block chain network in degree can not manage.
It should be noted that embodiments of the present invention can be realized by the combination of hardware, software or software and hardware.
Hardware components can use special logic to realize；Software section can store in memory, by instruction execution system appropriate
System, such as microprocessor or special designs hardware execute.It will be understood by those skilled in the art that above-mentioned equipment
Computer executable instructions can be used and/or be included in the processor control code with method and realize, such as in such as magnetic
Disk, the mounting medium of CD or DVD-ROM, such as read-only memory (firmware) programmable memory or such as optics or electricity
Such code is provided in the data medium of subsignal carrier.Equipment and its module of the invention can be by such as ultra-large
The semiconductor or such as field programmable gate array of integrated circuit or gate array, logic chip, transistor etc. can be compiled
The hardware circuit realization of the programmable hardware device of journey logical device etc., can also be soft with being executed by various types of processors
Part is realized, can also be realized by the combination such as firmware of above-mentioned hardware circuit and software.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of second-hand mobile phone exchange information processing method based on block chain, which is characterized in that two based on block chain
Mobile phone is carried to agency and carries out testing machine by hand mobile phone exchange information processing method seller, and the information for machine of testing is passed through hand by administrator
Machine information contract is saved to block chain network；True cellphone information is saved to block chain network again and is checked for buyer.
2. the second-hand mobile phone exchange information processing method based on block chain as described in claim 1, which is characterized in that the base
It is specifically included in the second-hand mobile phone exchange information processing method of block chain:
The first step, seller are registered using the light client metamask in ether mill, and the account address of ether mill network is obtained after registration；
Administrator disposes cellphone information contract；Administrator updates web platform；Buyer registers in block chain network after having purchase intention；
Buyer buys ether coin with currency, and buys token by token contract ether coin；
Second step, buyer access web platform, first pass through mobile phone fixed information and select mobile phone, to further check that mobile phone is variable
Information can input IEMI in web platform and pass through cellphone information contract inquiry mobile phone variable information；Buyer someone buys mobile phone, hands over
For easy contract after receiving the token that buyer sends to contract, state variable isReceiveMoney becomes true, informs seller's hair
Goods；
Third step, after forming payment wish, buyer fills in the shipping address information of oneself, and sends and appraisal to transaction contract
Equal fund, seller delivers at this time, which can call function to take out after the stipulated time by seller, when seller takes out fund
It is buyer that contract of trading, which will modify owner's information,；Seller sends mobile phone to buyer, can call after the contract stipulated time of trading
Function takes out the token in contract, and intelligence contract modification owner's information is buyer when token is removed；
4th step, buyer receive mobile phone, and transaction terminates；It sells household token and exchanges ether coin to token contract.
3. the second-hand mobile phone exchange information processing method based on block chain as claimed in claim 2, which is characterized in that the pipe
It includes: that IMEI, historical trading, repair message, valuation information, owner's information pass through cellphone information that reason person, which will test the resulting information of machine,
Contract is saved to block chain network；
Administrator disposes cellphone information contract, and the account address for only disposing contract just has permission and calls the contract；
Cellphone information contract include 3 functions, be respectively: by the addPhoneinfo function of information preservation to block chain network,
It updates the updatePhoneinfo function of the information saved, read the getPhoneinfo function of the information saved.
4. the second-hand mobile phone exchange information processing method based on block chain as claimed in claim 2, which is characterized in that described
Web platform includes: pattern, memory, color, the IEMI of mobile phone；Variable information inquires column, the unique identification of user's input handset
Code.
5. the second-hand mobile phone exchange information processing method based on block chain as claimed in claim 2, which is characterized in that the base
One state variable isReceiveMoney is set in the transaction contract of the second-hand mobile phone exchange information processing method of block chain,
If contract receives the token of buyer's transmission, which becomes true；
The seller of the second-hand mobile phone exchange information processing method based on block chain calls the takeMoney letter in transaction contract
Number takes out token, and updatePhoneinfo function will be called to modify owner's information inside the function；
Seller calls the sell function in token contract, and token is sold to token contract account, obtains ether coin.
6. the second-hand mobile phone exchange information processing method based on block chain as claimed in claim 2, which is characterized in that the base
The buy function of token contract is called in the buyer of the second-hand mobile phone exchange information processing method of block chain, buys generation with ether coin
Coin；
The getPhoneinfo function of calling mobile phone information contract reads cellphone information；
When transferring accounts to transaction contract, addition remark information is the shipping address of oneself.
7. the second-hand mobile phone exchange information processing method based on block chain as claimed in claim 2, which is characterized in that the base
In the token contract concrete function of the second-hand mobile phone exchange information processing method of block chain include: trading function；Token is changed to close
About deployer；Frozen Account；Token additional issue；The exchange of token and ether coin；
The cellphone information contract of the second-hand mobile phone exchange information processing method based on block chain includes:
Mobile phone IEMI, mobile phone variable information are stored in the storage of intelligent contract；By function call, input handset IEMI,
Return to mobile phone variable information.
8. a kind of perform claim require 1 second-hand mobile phone exchange information processing method based on block chain based on block chain
Second-hand mobile phone busines sinformation processing/system, which is characterized in that the second-hand mobile phone busines sinformation processing/system based on block chain
Include:
Vendor information management module obtains the account of ether mill network for the light client metamask registration in ether mill after registration
Family address；Dispose cellphone information contract；After receiving the token that buyer sends to contract, state variable isReceiveMoney becomes
For true, inform that seller can deliver；Mobile phone is sent to buyer, callable function, which is taken out, after the contract stipulated time of trading closes
Token in about, intelligence contract modification owner's information is buyer when token is removed；Ether coin is exchanged to token contract with token；
Bidder Information management module buys ether coin, and pass through token contract ether for registering in block chain network
Coin buys token；Pass through cellphone information contract inquiry mobile phone variable information；Fill in the shipping address information of oneself, and to transaction
Contract sends the fund equal with appraisal；
Token contract module, for defining platform transaction token used；
Cellphone information contract module for cellphone information to be saved in block chain, and provides each mobile phone of function access
Variable information；
Transaction contract module, for arranging the process of both parties' transaction, buyer calls transaction contract, inputs when buying mobile phone
IEMI, shipping address, and to contract bill payment token.
9. a kind of realize second-hand mobile phone exchange information processing method described in claim 1~7 any one based on block chain
Information data processing terminal.
10. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer executes such as
Second-hand mobile phone exchange information processing method described in claim 1-7 any one based on block chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910376379.9A CN110288339B (en) | 2019-05-07 | 2019-05-07 | Second-hand mobile phone transaction information processing system and method based on block chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910376379.9A CN110288339B (en) | 2019-05-07 | 2019-05-07 | Second-hand mobile phone transaction information processing system and method based on block chain |
Publications (2)
| Publication Number | Publication Date |
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| CN110288339A true CN110288339A (en) | 2019-09-27 |
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| CN111626857A (en) * | 2020-05-28 | 2020-09-04 | 中国建设银行股份有限公司 | Revenue issuing method and device, electronic equipment and computer readable storage medium |
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| CN110288339B (en) | 2022-11-11 |
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