CN110264195A - It is marked and transaction, the receipt storage method of user type and node in conjunction with code - Google Patents

Abstract

This specification one or more embodiment provides a kind of combination code mark and transaction, the receipt storage method of user type and node, this method may include: that the first block chain node receives the transaction for corresponding to intelligent contract for passing through encryption, include the field indicated by exposing identifier in the code of the intelligence contract；First block chain node decrypts the transaction in credible performing environment and executes the code of the intelligent contract of acquisition, obtains receipt data；First block chain node determines corresponding exposure field according to the type of transaction of the transaction；First block chain node stores the receipt data, when the initiator that trades belongs to pre-set user type, makes to be stored in the receipt data by the exposure field that the exposed identifier is indicated with plaintext version storage, remaining receipt field with ciphertext form.

Description

It is marked and transaction, the receipt storage method of user type and node in conjunction with code

Technical field

This specification one or more embodiment be related to block chain technical field more particularly to a kind of combination code mark with Transaction, the receipt storage method of user type and node.

Background technique

Block chain technology constructs on transmission network (such as point to point network).Network node in transmission network utilizes Linked data structure is verified and storing data, and knows together algorithm using distributed node to generate and more new data.

Technically maximum two challenges are exactly privacy and performance to the block platform chain of enterprise-level at present, and often the two are chosen War is difficult to solve simultaneously.Most solutions are all to exchange privacy for by losing performance, or less consider that privacy goes the property pursued Energy.The encryption technology of common solution privacy concern, as homomorphic cryptography (Homomorphic encryption) and Zero Knowledge are demonstrate,proved Complexities such as bright (Zero-knowledge proof) are high, poor universality, but also may bring serious performance loss.

Credible performing environment (Trusted Execution Environment, TEE) is another solution privacy concern Mode.TEE can play the role of the black box in hardware, and the code and data operating system layer executed in TEE can not all be peeped, Interface predetermined can just operate on it only in code.In terms of efficiency, due to the black box property of TEE, in TEE Carry out operation is clear data, rather than the complicated cryptography arithmetic in homomorphic cryptography, calculating process efficiency are not lost, because This combines safety and the privacy that block chain can be largely promoted under the premise of performance loss is lesser with TEE. Industry very pays close attention to the scheme of TEE at present, and the chip and software league of nearly all mainstream have the TEE solution party of oneself Case, TPM's (Trusted Platform Module, reliable platform module) and hardware aspect including software aspects Intel SGX (Software Guard Extensions, software protection extension), ARM Trustzone (trusted domain) and AMD PSP (Platform Security Processor, platform safety processor).

Summary of the invention

In view of this, this specification one or more embodiment provides a kind of combination code mark and transaction, user type Receipt storage method and node.

To achieve the above object, it is as follows to provide technical solution for this specification one or more embodiment:

According to this specification one or more embodiment in a first aspect, propose a kind of combination code mark and transaction, The receipt storage method of user type, comprising:

First block chain node receives the transaction for corresponding to intelligent contract by encryption, in the code of the intelligence contract Including the field indicated by exposure identifier；

First block chain node decrypts the transaction in credible performing environment and executes the intelligent contract of acquisition Code obtains receipt data；

First block chain node determines corresponding exposure field according to the type of transaction of the transaction；

First block chain node stores the receipt data, when the initiator that trades belongs to pre-set user type, makes described By the exposure field that the exposed identifier is indicated is stored with plaintext version, remaining receipt field is with ciphertext form in receipt data Storage.

According to the second aspect of this specification one or more embodiment, propose a kind of combination code mark and transaction, The receipt memory node of user type, comprising:

Receiving unit receives the transaction for corresponding to intelligent contract by encryption, includes in the code of the intelligence contract The field indicated by exposure identifier；

Decryption unit decrypts the transaction in credible performing environment, obtains the code of the intelligent contract；

Execution unit executes the code of the intelligent contract in the credible performing environment, obtains receipt data；

Determination unit determines corresponding exposure field according to the type of transaction of the transaction；

Storage unit stores the receipt data, when the initiator that trades belongs to pre-set user type, makes the receipt number It is stored in by the exposure field that the exposed identifier is indicated with plaintext version storage, remaining receipt field with ciphertext form.

According to the third aspect of this specification one or more embodiment, a kind of electronic equipment is proposed, comprising:

Processor；

Memory for storage processor executable instruction；

Wherein, the processor is by running the executable instruction to realize method as described in relation to the first aspect.

According to the fourth aspect of this specification one or more embodiment, a kind of computer readable storage medium is proposed, The step of being stored thereon with computer instruction, method as described in relation to the first aspect realized when which is executed by processor.

Detailed description of the invention

Fig. 1 is a kind of schematic diagram for creation intelligence contract that an exemplary embodiment provides.

Fig. 2 is a kind of schematic diagram for calling intelligence contract that an exemplary embodiment provides.

Fig. 3 is the receipt storage side of a kind of combination code mark and transaction, user type that an exemplary embodiment provides The flow chart of method.

Fig. 4 is a kind of schematic diagram that secret protection is realized on block chain node that an exemplary embodiment provides.

Fig. 5 is a kind of function that block chain network is realized by system contract and chain code that an exemplary embodiment provides The schematic diagram of logic.

Fig. 6 is that a kind of combination code mark that an exemplary embodiment provides and transaction, the receipt storage of user type save The block diagram of point.

Specific embodiment

Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment Described in embodiment do not represent all embodiments consistent with this specification one or more embodiment.Phase Instead, they are only some aspects phases with the one or more embodiments of as detailed in the attached claim, this specification The example of consistent device and method.

It should be understood that the sequence that might not show and describe according to this specification in other embodiments executes The step of correlation method.In some other embodiments, step included by method can than described in this specification more It is more or less.In addition, single step described in this specification, may be broken down into other embodiments multiple steps into Row description；And multiple steps described in this specification, it may also be merged into single step progress in other embodiments Description.

Block chain is normally divided into three types: publicly-owned chain (Public Blockchain), privately owned chain (Private ) and alliance's chain (Consortium Blockchain) Blockchain.In addition, there are also a plurality of types of combinations, such as privately owned chain The different combinations such as+alliance chain, alliance's chain+publicly-owned chain.It is publicly-owned chain that wherein decentralization degree is highest.Publicly-owned chain with than Special coin, ether mill are representative, and the participant that publicly-owned chain is added can read data record on chain, participate in business and compete newly Book keeping operation power of block etc..Moreover, each participant's (i.e. node) freely can be added and exit network, and carry out relevant operation.It is private There is chain then on the contrary, the write-in permission of the network is by some tissue or mechanism controls, reading data permission is by organization prescribed.Simply For, privately owned chain can be weak center's system, and participating in node has stringent limitation and less.Such block chain is more It is suitable for using inside particular organization.Alliance's chain is then block chain between publicly-owned chain and privately owned chain, it can be achieved that " part Decentralization ".Each node usually has corresponding physical mechanism or tissue in alliance's chain；Participant is added by authorization Enter network and composition interests correlation alliance, it is common to safeguard the operation of block chain.

Whether publicly-owned chain, privately owned chain or alliance's chain may all provide the function of intelligent contract.Intelligence on block chain Contract is the contract that can be executed by transaction triggering on block catenary system.Intelligent contract can pass through the formal definition of code.

By taking ether mill as an example, user is supported to create in the network of ether mill and call the logic of some complexity, this is ether Mill is different from the ultimate challenge of bit coin block chain technology.Ether mill is ether mill void as the core of a programmable block chain Quasi- machine (EVM), each ether mill node can run EVM.EVM is the complete virtual machine of figure spirit, it means that can be with The logic of various complexity is realized by it.It is exactly to run on EVM that user, which issues in ether mill and call intelligent contract,.It is real On border, what virtual machine was directly run is virtual machine code (Virtual Machine bytecodes, lower abbreviation " bytecode ").It is deployed on block chain Intelligent contract can be the form of bytecode.

Such as shown in Fig. 1, after a transaction comprising the intelligent contract information of creation is sent ether mill network by Bob, section The EVM of point 1 can execute this and trade and generate corresponding contract example." 0x6f8ae93 ... " in 1 in figure represents this The address of contract, what the data field of transaction saved can be bytecode, and the to field of transaction is sky.Pass through common recognition machine between node After system is reached an agreement, this contract is successfully created, and can be called in the follow-up process.After contract creation, on block chain There is a contract account corresponding with the intelligence contract, and possess a specific address, contract code will be stored in the conjunction About in account.The behavior of intelligent contract is controlled by contract code.In other words, intelligent contract to generate on block chain comprising closing The about virtual account of code and account storage (Storage).

As shown in Fig. 2, one is used to call the transaction of intelligent contract to be sent to ether mill by Bob still by taking ether mill as an example After network, the EVM of a certain node can execute this and trade and generate corresponding contract example.The from word traded in 2 in figure Section is the address of the account of transaction initiator (i.e. Bob), and " 0x6f8ae93 ... " in field represents called intelligence and close Address about, value field are the value of ether coin, the side of the intelligent contract of the calling that the data field of transaction saves in ether mill Method and parameter.Intelligent contract in a prescribed manner in block chain network each node disjoint execution, all execution record and Data are all stored on block chain, so just saving the transaction that can not be distorted, will not lose on block chain after the completion of transaction Voucher.

Node in block chain network can generate corresponding receipt (receipt) number after executing the transaction that Bob is initiated According to for recording the relevant receipt information of the transaction.By taking ether mill as an example, node executes the resulting receipt data of trading can be with Including following content:

Result field indicates the implementing result of transaction；

Gas used field indicates the gas value of transaction consumption；

Logs field indicates that the log that transaction generates, log may further include From field, To field, Topic word Section and Log data field etc., wherein From field indicates that the account address of the initiator called, To field indicate called pair As the account address of (such as intelligent contract), Topic field indicate that the theme of log, Log data field indicate daily record data；

Output field indicates the output of transaction.

In general, the receipt data that transaction generates after executing is stored with plaintext version, anyone is it can be seen that receive According to the content of above-mentioned each receipt field contained by data, the setting and ability of no secret protection.And in some block chains and TEE In the solution combined, in order to realize secret protection, the full content of receipt data, which is taken as, needs secret protection Data are stored on block chain.The block chain is stored in data set made of certain logic tissue in the database of node It closes.The database, as described later, physical support can store medium, such as persistent storage medium.In fact, receipt May there was only partial content in data is sensitive, and other contents and insensitive, it is only necessary to be carried out for sensitive content hidden Private protection, other content can disclose, or even may need to implement partial content retrieval in some cases to drive correlation The implementation of operation, then implementing secret protection for this partial content will affect the implementation of search operaqtion.

Below in conjunction with the receipt storage method for illustrating that the application one combines code mark and transaction, user type shown in Fig. 3 Embodiment realization process:

Step 302, the first block chain node receives the transaction for corresponding to intelligent contract by encryption, the intelligence contract Code in include by the field indicated of exposure identifier.

In one embodiment, user can add exposure identifier when writing the code of intelligent contract in code One or more fields are indicated, to express following meanings in the code dimension of the intelligence contract: for exposure identifier mark Bright field, it is desirable to receipt contents corresponding in receipt data are stored using plaintext version, and receipts corresponding to remaining field Then ciphertext form is used to store according to content.Certainly, finally whether the field that exposure identifier is indicated is stored using plaintext version, It also needs to combine the relevant informations such as the user type of type of transaction and transaction initiator described below, wouldn't repeat herein.

As described above, in the transaction for creating intelligent contract, what data field saved can be the intelligence contract Bytecode.Bytecode is made of a series of byte, and each byte can identify an operation.Based on development efficiency, readable Property etc. it is many-sided consider, developer can not directly write bytecode, but select a high level language intelligence contract generation Code.The code of the intelligent contract of high level language compiles by compiler and generates bytecode, and then the bytecode can portion It affixes one's name on block chain.There are many high-level language that ether mill is supported, such as Solidity, Serpent, LLL language.

By taking Solidity language as an example, the contract write with it and class (Class) the very phase in Object-Oriented Programming Language Seemingly, a variety of members, including state variable, function, function modifier, event etc. can be stated in a contract.Be as follows with The example code 1 for the simple intelligent contract that Solidity language is write:

In the code for the intelligent contract write based on Solidity language, one can be indicated by exposure identifier Or multiple fields, the meaning of expression are as follows: it is desirable that by the receipt contents of this part field are corresponded in receipt data with plaintext shape Formula stores (needing to determine whether reality uses stored in clear further combined with the dimension of user type and type of transaction), and incite somebody to action Remaining receipt contents is stored with ciphertext form.Similarly, in the generation for the intelligent contract write based on Serpent, LLL language etc. In code, it again may be by exposing identifier to indicate one or more fields, to show similar meaning.

Exposure identifier can be exclusively used in indicating the receipt field for needing stored in clear, such as can use keyword Plain characterizes the exposure identifier.So, for wish with plaintext version store field, can corresponding field it Preceding addition plain (alternatively, can also be associated using other modes with corresponding field), than Result as described above The From field that is further included in field, Gas used field, Logs field, Output field etc. or Logs field, To Field, Topic field, Log data field etc..For example, above-mentioned example code 1 can be adjusted to following example codes 2:

In above-mentioned example code 2, by adding exposure identifier " plain " in the code forefront of intelligent contract, So that all fields in receipt data allow to be stored with plaintext version, thus if transaction initiator belongs to default use Family type, then exposed field corresponding for the type of transaction of transaction belonging to the intelligence contract, in the code quilt of intelligent contract After execution, corresponding receipt contents will be stored in the receipt data of generation with plaintext version, and subsequent can be directed to these Receipt contents implement search operaqtion；For example, the From field is when From field belongs to above-mentioned exposure field with plaintext version After storage, it can be used for counting the trading volume etc. that a certain account is initiated.

Above-mentioned exposed identifier plain corresponds to all fields in receipt data；It and in other embodiments, can also be with Particularly point out the field for needing stored in clear.For example, when being labeled by exposure identifier to From field, it is only necessary to be directed to The From field is judged: when the From field is above-mentioned exposure field, in transaction, initiator belongs to pre-set user class In the case where type, the receipt data generated after being performed for the code of intelligent contract can be by the corresponding receipt of From field Content is stored with plaintext version, and other receipt contents are stored with ciphertext form.

It is noted that in above-mentioned example code 2 and its related embodiment, by exposure identifier " plain " institute The field (all fields or From field) indicated is contract grade field, so that the first block chain node is in storage receipt data When, if transaction initiator belongs to pre-set user type and the From field for exposure field, the first block chain node meeting All receipt contents for corresponding to the contract grade field in receipt data are stored with plaintext version.Especially, when intelligent contract Code in include multiple events when, contract grade field can be adapted for all events in intelligent contract, then with From word For section: when it is the corresponding exposed field of type of transaction that the initiator that trades, which belongs to pre-set user type and From field, for The corresponding Logs field of generation of multiple events respectively, From field contained by every Logs field can use plaintext shape Formula is stored, without adding exposure identifier respectively for each event.

Other than contract grade field, the field that exposure identifier is indicated may include: to correspond in intelligent contract to define At least one event event level field so that the first block chain node is when storing receipt data, if transaction initiator Belong to pre-set user type and event level field belongs to the corresponding exposed field of type of transaction, it is right in receipt data to determine Should in the receipt contents of at least one event, and will in the receipt contents that determined correspond to above-mentioned event level field part It is stored with plaintext version.It especially, can be at least part event setup when in intelligent contract including multiple events The event level field stated, so that the part in the corresponding receipt contents of this partial event corresponding to event level field is with plaintext version Storage, and remainder, the corresponding receipt contents of its complementary event in the corresponding receipt contents of this partial event etc. is with ciphertext Form storage.By taking From field as an example, above-mentioned example code 1 can be adjusted to following example codes 3:

In above-mentioned example code 3, by the corresponding event functions " event of event currentPrice The corresponding character from of addition From field in currentPrice (int price) ", and it is sudden and violent used by character from Dew identifier is different from plain above-mentioned, but is modified by quotation marks character from, then drawing in example code 3 Number it is equivalent to exposed identifier above-mentioned, so that From field is marked as event level field, thus when transaction initiator belongs to When pre-set user type and From field belong to type of transaction corresponding exposed field, in the corresponding Logs field generated of the event In, From field will be stored with plaintext version.Other than above-mentioned event currentPrice, if the generation of intelligent contract Code also includes another event, then above-mentioned event level field will not influence another event, the corresponding receipt of another event Content will be stored with ciphertext form.

In one embodiment, above-mentioned example code 3 can be adjusted to following example codes 4:

In above-mentioned example code 4, by the corresponding event functions " event of event currentPrice Exposure identifier " plain " is added before currentPrice (int price) ", so that event level field includes the event All fields in the corresponding log Logs of currentPrice, for example From field above-mentioned, To field, Topic field, Log Data field etc. can determine these fields when the initiator that trades belongs to pre-set user type according to type of transaction In exposure field, and the exposure field determined is stored with plaintext version.

In one embodiment, the corresponding intelligent contract of the received transaction of the first block chain node, can be through advanced language It says the intelligent contract write, or can be the intelligent contract of bytecode form.Wherein, when intelligent contract is high level language Intelligent contract when, the first block chain node also passes through compiler and is compiled to the intelligent contract of the high level language, raw At the intelligent contract of bytecode form, to be executed in credible performing environment.And when the received transaction pair of the first block chain node When the intelligent contract answered is the intelligent contract of bytecode form, the intelligent contract of the bytecode form can be passed through compiling by client Device is compiled the intelligent contract of high level language and obtains, and the intelligent contract of the high level language by user in visitor It writes to obtain on the end of family.

Corresponding intelligent contract of trading received for the first block chain node, can be user in the first block chain node The intelligent contract of upper generation.When user obtains above-mentioned intelligent contract using high level language, the first block chain node is also The intelligent contract of the high level language is compiled as to the intelligent contract of bytecode form by compiler；Alternatively, user can also It can directly write to obtain the intelligent contract of bytecode form on the first block chain node.

Corresponding intelligent contract of trading received for the first block chain node, can generate on the client for user Intelligent contract.For example, user by corresponding account after client generates the transaction, transaction is committed to by the client First block chain node.It include transaction/query interface in the first block chain node, which can be with client pair by taking Fig. 4 as an example It connects, client is allowed to submit above-mentioned transaction to the first block chain node.Than as described above, user can use advanced language Speech writes intelligent contract on the client, is then compiled by client by intelligent contract of the compiler to the high-level language It translates, obtains the intelligent contract of corresponding bytecode form.Certainly, client can be directly by the intelligent contract of high level language It is sent to the first block chain node, so that the first block chain node is compiled as the intelligent contract of bytecode form by compiler.

Corresponding intelligent contract of trading received for the first block chain node, can pass through the second block chain for client Intelligent contract in the transaction that node is sent, the intelligence contract are usually bytecode form；Certainly, which may be The intelligent contract of high level language, the then intelligence that the first block chain node can be compiled as bytecode form by compiler are closed About.

In one embodiment, when in the code of intelligent contract including exposure identifier, the intelligence of high level language is closed About it can have identical exposed identifier with the intelligent contract of bytecode form.And it should be understood by those skilled in the art that Be: bytecode can using different from high-level language exposure identifier, such as high level language intelligent contract code In comprising first identifier symbol, the intelligent contract of bytecode form code in accord with comprising second identifier, then first identifier Fu Yu There are corresponding relationships between two identifiers, it is ensured that after being compiled as bytecode by high-level language, will not influence the function of exposed identifier Energy.

Step 304A, the first block chain node decrypt the transaction in credible performing environment and execute the intelligence of acquisition The code of energy contract, obtains receipt data.

In one embodiment, above-mentioned transaction can be encrypted by way of symmetric encipherment algorithm, can also be used non- The mode of symmetry algorithm is encrypted.The Encryption Algorithm that symmetric cryptography uses, e.g. DES algorithm, 3DES algorithm, TDEA are calculated Method, Blowfish algorithm, RC5 algorithm, IDEA algorithm etc..Rivest, shamir, adelman, e.g. RSA, Elgamal, knapsack algorithm, Rabin, D-H, ECC (elliptic curve encryption algorithm) etc..

In one embodiment, above-mentioned transaction can be carried out by way of symmetric encipherment algorithm combination rivest, shamir, adelman Encryption.By taking above-mentioned transaction is committed to the first block chain node by client as an example, client can be added using symmetric encipherment algorithm Close transaction content encrypts transaction content using the key of symmetric encipherment algorithm, and is added with rivest, shamir, adelman cryptographic symmetrical The key used in close algorithm, for example using the key used in the public key encryption symmetric encipherment algorithm of rivest, shamir, adelman. In this way, can be first decrypted using the private key of rivest, shamir, adelman after the first block chain node receives the transaction of encryption, The key of symmetric encipherment algorithm is obtained, and then decrypts to obtain transaction content with the key of symmetric encipherment algorithm.For example, when transaction is used When creating intelligent contract, transaction content may include the code of the intelligent contract of required creation；When transaction is for calling intelligence When contract, transaction content may include the account address of called intelligent contract, the method for needing to be passed to and parameter etc..

When transaction is for calling intelligent contract, the calling of multinest structure can be.For example, transaction calls directly intelligence Can and about 1, and the intelligence and about 1 code have invoked intelligence and about 2, and the code in intelligence and about 2 be directed toward it is intelligent with about 3 Contract address so that transaction actually have invoked indirectly intelligence and about 3 codes, and intelligence and about 3 in code can wrap Include the field indicated by exposure identifier.In this way, being equivalent to the word for containing in intelligence and about 1 and indicating by exposure identifier Section.Specific implementation process is similar with the above process, and details are not described herein.

As previously mentioned, the first received transaction of block chain node, such as can be creation and/or call the friendship of intelligent contract Easily.Such as in ether mill, the first block chain node receives the creation that client is sent and/or calls the transaction of intelligent contract Afterwards, can check transaction whether effectively, format it is whether correct, whether the signature for verifying transaction legal etc..

In general, the node in ether mill is typically also the node of contention book keeping operation power, and therefore, the first block chain node is made Node for contention book keeping operation power can be performed locally the transaction.If one in the node of contention book keeping operation power is striven in epicycle It wins during taking book keeping operation power by force, then becomes accounting nodes.If the first block chain node is in the process of epicycle contention book keeping operation power In win, just become accounting nodes；Certainly, if if the first block chain node does not have during epicycle contention is kept accounts and weighed It wins, is not then accounting nodes, and other nodes are likely to become accounting nodes.

Intelligent contract is similar to the class in Object-Oriented Programming, and the contract that the result of execution generates the corresponding intelligence contract is real Example is similar to and generates the corresponding object of class.It executes in transaction for creating the process of the code of intelligent contract, will create contract account Family, and contract is disposed in account space.In ether mill, the address of intelligent contract account is address (such as Fig. 1-2 by sender In " 0xf5e ... ") and transaction random number (nonce) as input, pass through what Encryption Algorithm generated, such as the conjunction in Fig. 1-2 About address " 0x6f8ae93 ... " is generated by the encrypted algorithm of nonce in the address of sender " 0xf5e ... " and transaction.

In general, proved using proof of work (Proof of Work, POW) and equity (Proof of Stake, POS), equity is appointed to prove the area of support intelligence contract of the common recognition such as (Delegated Proof of Stake, DPOS) algorithm In block chain network, the node of contention book keeping operation power can execute the friendship after receiving the transaction comprising the intelligent contract of creation Easily.Contention book keeping operation power node in may one of them epicycle contention keep accounts weigh during win, become accounting nodes.Note This can be included transaction of intelligent contract by account node and other transaction be packaged together and generate new block, and by the new of generation Block be sent to other nodes and know together.

For using machines such as practical Byzantine failure tolerance (Practical Byzantine Fault Tolerance, PBFT) In the block chain network of the support intelligence contract of system, there is the node of book keeping operation power to have agreed upon before epicycle book keeping operation.Therefore, After one block chain node receives above-mentioned transaction, if itself not being the accounting nodes of epicycle, which can be sent to Accounting nodes.For the accounting nodes (can be the first block chain node) of epicycle, which is being packaged and is generating new block During perhaps before or by the transaction with it is other transaction be packaged together and generate new block during or before, The transaction can be executed.The transaction is packaged (or further including that other transaction are packaged together) and generates new area by the accounting nodes After block, the new block of generation or block head are sent to other nodes and known together.

As described above, in block chain network using the support intelligence contract of POW mechanism, or using POS, DPOS, In the block chain network of the support intelligence contract of PBFT mechanism, which can be packaged and generate new by the accounting nodes of epicycle Block, and the new block back zone build of generation is sent to other nodes and is known together.If other nodes receive institute It states after block that there is no problem through verifying, which can be appended to original block chain end, to complete to keep accounts Journey is reached common understanding；If transaction completes deployment of the intelligent contract in block chain network, if handing over for creating intelligent contract It is easy for calling intelligent contract, then completes the calling and execution of intelligent contract.Other node verification accounting nodes are sent new Block or block head during, the transaction in the block can also be executed.

The implementation procedure can generally be executed by virtual machine.By taking ether mill as an example, support user in ether mill network Middle creation and/or the logic for calling some complexity, this is the ultimate challenge that ether mill is different from bit coin block chain technology.Ether Mill is ether mill virtual machine (EVM, Ethereum Virtual Machine) as the core of a programmable block chain, each Ether mill node can run EVM.EVM is the complete virtual machine of a figure spirit, it means that can be realized by it various Complicated logic.It is exactly to run on EVM that user, which issues in ether mill and call intelligent contract,.

In the present embodiment, the first block chain node can be in credible performing environment (Trusted Execution Environment, TEE) in execute decryption intelligent contract code.Such as shown in Fig. 4, the first block chain node can be divided For conventional performing environment (being located at left side in figure) and TEE, (as described above, transaction may exist it for the transaction that client is submitted His source；This is illustrated for sentencing the transaction of client submission) initially enter " transaction/inquiry in conventional performing environment Interface " is identified, can be left on to be handled in conventional performing environment there is no the transaction of privacy process demand and (here may be used Recognize whether that privacy handles need with identifier according to contained by the user type of transaction initiator, type of transaction, transaction etc. Ask), and the transaction transport that privacy process demand will be present is handled into TEE.TEE and conventional performing environment are mutually isolated. Transaction is in encrypted state before entering TEE, and the transaction content of plaintext is then decrypted as in credible performing environment, thus Under the premise of ensuring data safety, the transaction content of the plaintext is enabled to realize efficient process in TEE, and raw in TEE At the receipt data of plaintext.

TEE is the security extension based on CPU hardware, and the credible performing environment completely isolated with outside.TEE be earliest by The concept that Global Platform is proposed, for solving the security isolation of resource in mobile device, being parallel to operating system is to answer Credible and secure performing environment is provided with program.The Trust Zone technology of ARM realizes the TEE technology of real commercialization earliest. Along with the high speed development of internet, safe demand is higher and higher, is not limited only to mobile device, cloud device, data center More demands all are proposed to TEE.The concept of TEE has also obtained the development and expansion of high speed.Now described TEE compare with The concept initially proposed has been the TEE of more broad sense.For example, server chips manufacturer Intel, AMD etc. are successively proposed The TEE of hardware auxiliary and the concept and characteristic for enriching TEE, have been widely recognized in industry.The TEE lifted now is logical Often more refer to the TEE technology of this kind of hardware auxiliary.Different from mobile terminal, cloud access needs to remotely access, and terminal user is to hard Part platform is invisible, therefore seeks to the genuine and believable of confirmation TEE using the first step of TEE.Therefore present TEE technology is all drawn Enter remote proving mechanism, endorsed by hardware vendor (mainly CPU manufacturer) and ensures user to TEE by digital signature technology State can verify that.It is simultaneously only the demand for security that the resource isolation of safety is also unable to satisfy, further data-privacy protection Also it is suggested.Including Intel SGX, the commercial TEE including AMD SEV also both provides memory encryption technology, by reliable hardware It is limited to inside CPU, the data of bus and memory are that ciphertext prevents malicious user from being spied upon.For example, the software of Intel Protection extends code execution, remote proving, security configuration, the secure storage of data such as (SGX) TEE technology insulation and is used for Execute the trusted path of code.The application program run in TEE is kept safe, as a consequence it is hardly possible to be accessed by third party.

By taking Intel SGX technology as an example, SGX provides enclosure (enclave, also referred to as enclave), i.e., one adds in memory Close credible execution region, protects data not to be stolen by CPU.By taking the first block chain node is using the CPU for supporting SGX as an example, Using newly-increased processor instruction, a part of region EPC (Enclave Page Cache, enclosure page can be distributed in memory Face caching or enclave page cache), by the crypto engine MEE (Memory Encryption Engine) in CPU to wherein Data encrypted.The content encrypted in EPC, which only enters after CPU, can just be decrypted into plain text.Therefore, in SGX, user It can distrust operating system, VMM (Virtual Machine Monitor, monitor of virtual machine), even BIOS (Basic Input Output System, basic input output system), it is only necessary to trust CPU just and can ensure that private data will not leak. It in practical application, is transferred in enclosure after private data being encrypted with ciphertext form, and will be corresponding by remote proving Code key is also passed to enclosure.Then, operation is carried out using data under the encipherment protection of CPU, as a result can be returned with ciphertext form.This Under kind mode, powerful calculating power not only can use, but also do not have to concern of data and leak.

There are the transaction of privacy process demand for including intelligent contract in the transaction when creating intelligent contract when above-mentioned Code, the first block chain node can be decrypted to obtain the code of intelligence contract contained by it in TEE to the transaction, and in turn The code is executed in TEE.When it is above-mentioned there are the transaction of privacy process demand for call intelligent contract when, the first block chain link Point can execute the code (if called intelligent contract processing encrypted state, needs first in TEE to the intelligence in TEE Energy contract is decrypted, to obtain corresponding code).Specifically, the first block chain node can use the processing increased newly in CPU Device instruction, distributes a part of region EPC in memory, is added by the crypto engine MEE in CPU to above-mentioned plaintext code In the close deposit EPC.The content encrypted in EPC is decrypted into plain text after entering CPU.In CPU, the code of plaintext is carried out Implementation procedure is completed in operation.For example, executing the plaintext code of intelligent contract in SGX technology, EVM being loaded into enclosure In.During remote proving, Key Management server can calculate the hash value of local EVM code, and with the first block chain The hash value of the EVM code loaded in node compares, comparison result correctly as a necessary condition by remote proving, from And complete the measurement of the code loaded to the first block chain node SGX enclosure.Through excess vol, correct EVM can be held in SGX The code of the above-mentioned intelligent contract of row.

Step 304B, the first block chain node determine corresponding exposure field according to the type of transaction of the transaction.

In one embodiment, transaction may include type of transaction field (such as TransType field), the type of transaction field Value for indicating corresponding type of transaction.Therefore, it by reading the value for contained type of transaction field of trading, can determine Type of transaction out, for example deposit card type, assets transfer and (such as transfer accounts) type, contract creation type, contract call type, this theory Bright book is limited not to this.

In one embodiment, different types of transaction can be respectively present corresponding exposed field.Exposure field is receipt The one or more fields specified in data can combine under the premise of receipt data needs ciphertext to store to protect privacy Match condition between the field that exposed identifier above-mentioned is indicated and exposure field, to belong to default use in transaction initiator When the type of family, selectively the corresponding receipt contents of exposure field that the identifier that is exposed is indicated are deposited with plaintext version Storage, can be while meeting secret protection demand, so that the subsequent receipt contents for plaintext version storage implement retrieval Deng operation.

In one embodiment, the mapping relations between each type of transaction and exposure field can be pre-defined, and should Mapping relations are recorded in block chain, so that the available predefined mapping relations of the first block chain node, and further According to the type of transaction of above-mentioned transaction and the mapping relations, the exposure field in receipt data is determined.For example, it is corresponding to deposit card type Exposure field may include all fields except above-mentioned From field, the corresponding exposed field of assets transfer type can wrap Include above-mentioned To field, contract creation type and the corresponding exposed field of contract call type may include above-mentioned From field it Outer all fields, and the case where for other type of transaction, it no longer repeats one by one herein.

Wherein, above-mentioned mapping relations specifically can recorde in system contract.The mapping relations can also be recorded in In the chain code of block chain network.By the way that mapping relations are recorded in system contract, convenient for it is subsequent for the mapping relations into Row, which updates, to be upgraded, and the mapping relations being recorded in chain code are then not easy to realize relatively and update upgrading, subsequent to be directed to the two Difference is described, and wouldn't repeat herein.

Step 306, the first block chain node stores the receipt data, and when transaction, initiator belongs to pre-set user type When, make in the receipt data by exposure field that the exposed identifier is indicated with plaintext version storage, remaining receipt field It is stored with ciphertext form.

In one embodiment, there are corresponding external accounts on block chain by user, and initiate to hand over based on the external account Easily or implement other operations.So, user type, i.e. user type belonging to the external account belonging to transaction initiator.Cause This, the first block chain node can determine the corresponding external account of the transaction initiator, and by recording on inquiry block chain The corresponding user type of the external account, using as user type belonging to the transaction initiator.

In one embodiment, external account may include user type field (such as UserType being recorded on block chain Field), the value of the user type field corresponds to user type.For example, when the value of user type field is 00, user Type is ordinary user, and when the value of user type field is 01, user type is advanced level user, when user type field When value is 11, user type is management user etc..Therefore, the first block chain node can be by reading above-mentioned external account User type field, corresponding user type can be determined based on value.

In one embodiment, when creating above-mentioned external account, user type, which can be configured as, to be associated with to outside this Account is recorded in the incidence relation between user type and external account in block chain, such as by user type and outside Above-mentioned incidence relation is established in the account address of portion's account, so that the data structure of external account does not need to change, i.e., it is outer Portion's account is without including above-mentioned user type field.Therefore, the first block chain node can be recorded on block chain by reading Incidence relation determine the corresponding above-mentioned pre-set user class of the external account and based on the corresponding external account of transaction initiator Type.

In one embodiment, it can modify under certain condition to the user type of external account.For example, management is used Family can have modification claim, allow the first block chain node according to management Client-initiated change request, change above-mentioned The corresponding user type of external account.Management user can correspond to external account preset, with administration authority in wound generation block Family allows management user to carry out Type Change to other ordinary users, advanced level user etc., for example ordinary user is changed Ordinary user etc. is changed to for advanced level user, by advanced level user.

The mark of overall importance as defined in the programming language that exposure identifier is intelligent contract, as long as thus in intelligence After exposure identifier is written in contract, just it is difficult to modify the field that the exposure identifier is indicated.Therefore, by combining to user Type and type of transaction are considered, can user type, the corresponding exposed field of type of transaction according to belonging to transaction initiator, The field stored using plaintext version is more accurately chosen, and is not based only upon exposed identifier and is determined, thus When different user calls same intelligent contract or calls same intelligent contract by different types of transaction, so that stored in clear Field is matched with user type and type of transaction, and the storage mode for receipt data can be made to meet the practical need under different situations It asks, secret protection and Function Extension can be taken into account.

As it can be seen that this specification can be used to implement by exposing receipt contents to a certain extent to DAPP client Driving or other Function Extensions.Also, this specification is by comprehensively considering the field that exposed identifier is indicated, type of transaction pair Simultaneously the exposure field answered and user type belonging to initiator of trading, can accurately choose the field for stored in clear, i.e., The field for meeting " being indicated by exposure identifier " and " being matched with type of transaction ", thus meeting the same of above-mentioned Function Extension demand When, it is ensured that most privacy of user can be protected.

By program code (the hereinafter referred to as chain generation for running block chain on calculating equipment (physical machine or virtual machine) Code), it can be the block chain node in block chain network, such as the first above-mentioned block chain node by the calculating device configuration Deng.In other words, the first block chain node is by running above-mentioned chain code, to realize corresponding function logic.Therefore, Ke Yi It, will receipt data storage logic write-in relevant to exposure identifier, user type and type of transaction when creating block chain network In chain code, so that receipt data storage logic may be implemented in each block chain node；By taking the first block chain node as an example, The receipt data storage logic relevant to exposure identifier, user type and type of transaction may include: to user type Recognition logic, to the recognition logic of type of transaction, the logic stored based on exposure identifier to receipt contents.

First block chain node is used to indicate to the recognition logic of user type: the user type of identification transaction initiator. Such as: the incidence relation or system that can recorde between predefined external account and user type in system contract close It can recorde the corresponding relationship between the value and user type of user's type field in about.It can specifically refer to and above know The associated description of other user type, details are not described herein again.

First block chain node is used to indicate to the recognition logic of type of transaction: the transaction that identification transaction initiator is initiated Type.Such as: according to the value of the contained type field of transaction, determine the corresponding type of transaction of the transaction.Can specifically it join The associated description for above identifying type of transaction is examined, details are not described herein again.

The logic stored based on exposure identifier to receipt contents is used to indicate the first block chain node: for exposure Identifier is indicated, exposes the not specified field of identifier etc., is respectively adopted which kind of mode stores corresponding receipt contents.Such as: In the case where having confirmed user type, type of transaction and its corresponding exposed field, if transaction initiator belong to it is pre- If user type, then stored by the exposure field that exposure identifier is indicated using plaintext version, is indicated by exposure identifier Non-exposed field, ciphertext form be not all made of by the field indicated of exposure identifier stored.

However, the upgrading update of chain code is relatively difficult, so that realizing the storage to receipt data using chain code There is a problem of that flexibility is low, scalability is insufficient.In order to realize the Function Extension to chain code, as shown in figure 5, can use The mode that chain code is combined with system contract: chain code for realizing block chain network basic function, and in operational process Function Extension can be realized by way of system contract.Similar with above-mentioned intelligent contract, system contract includes example Such as the code of bytecode form, the first block chain node can be by the code of operating system contract (for example, according to unique corresponding Address " 0x53a98 ... " read the code in the system contract), realize and the function of chain code supplemented.Correspondingly, first Block chain node can read the code of system contract, define in the code of the system contract and exposure identifier, user class Type and the relevant receipt data of type of transaction store logic；Then, the first block chain node can execute the code of system contract, To store logic based on receipt data relevant to exposure identifier, user type and type of transaction, initiated in the transaction Side is when belonging to the pre-set user type, by the receipt data by exposure field that the exposed identifier is indicated in plain text Form storage, remaining receipt field are stored with ciphertext form.

It is different from the above-mentioned intelligent contract that block chain is distributed to by user, system contract can not freely be issued by user.The The system contract that one block chain node is read may include the preset system contract being configured in the wound generation block of block chain network；With And the administrator (i.e. above-mentioned management user) in block chain network can have the renewal authority for system contract, thus It is updated for such as above-mentioned preset system contract, then the system contract that above-mentioned first block chain node is read can also wrap Include system contract after updating accordingly.Certainly, system contract can be implemented once preset system contract by administrator after update It is obtained after update；Alternatively, system contract obtains after can implementing successive ignition update to preset system contract by administrator after updating Arrive, for example, by preset system contract update to obtain system and about 1, to system and about 1 update the system that obtains and about 2, system is closed About 2 updates obtain system and about 3, and the system and about 1, system and about 2, system and about 3 can be considered as system contract after update, But the first block chain node would generally be subject to the system contract of latest edition, for example the first block chain node can be with system contract Subject to code in 3, and the code in nonsystematic and about 1 or system and about 2.

Other than the preset system contract for including in wound generation block, administrator can also close delivery system in subsequent block About, and for the system contract issued it is updated.In short, should be closed by modes such as rights managements to system Publication about and update and implement a degree of limitation, with ensure block chain network function logic can normal operation, and It avoids causing unnecessary loss to any user.

First block chain node is encrypted by key pair at least part receipt contents.The encryption can use Symmetric cryptography can also use asymmetric encryption.If the first block chain node symmetric cryptography mode, i.e., calculated with symmetric cryptography The symmetric key of method encrypts receipt contents, then client (or other hold the object of key) can use the symmetric encipherment algorithm Symmetric key encrypted receipt contents are decrypted.

When the symmetric key of first block chain node symmetric encipherment algorithm encrypts receipt contents, the symmetric key It can be provided previously by client to the first block chain node.So, due to only having client (actually to should be in client The corresponding user of logon account) and the first block chain node grasp the symmetric key, enable only the client decrypt accordingly Encrypted receipt contents, avoid unrelated user even criminal encrypted receipt contents are decrypted.

For example, client, when initiating to trade to the first block chain node, client can use the first of symmetric encipherment algorithm Beginning key pair transaction content is encrypted, to obtain the transaction；Correspondingly, the first block chain node can be initial by obtaining this Key, for directly or indirectly being encrypted to receipt contents.For example, which can be by client and the first block Chain node is negotiated to obtain in advance, perhaps by Key Management server is sent to client and the first block chain node or by visitor Family end is sent to the first block chain node.When initial key is sent to the first block chain node by client, client can be with After encrypting by the public key of rivest, shamir, adelman to the initial key, encrypted initial key is sent to the firstth area Block chain node, and the first block chain node solves the encrypted initial key by the private key of rivest, shamir, adelman It is close, initial key is obtained, i.e., digital envelope encryption described above, details are not described herein again.

First block chain node can encrypt receipt contents using above-mentioned initial key.Difference transaction uses Initial key can be identical, so that the All Activity that same user is submitted is all made of the initial key and encrypts, or not The initial key used with transaction can be different, for example client can generate an initial key for each transaction is random, with Promote safety.

First block chain node can generate derivative key according to initial key and impact factor, and pass through the derivative key Receipt contents are encrypted.It being encrypted compared to initial key is directlyed adopt, derivative key can increase degree of randomness, thus The difficulty being broken is promoted, the safeguard protection for optimizing data is facilitated.Impact factor can be related to transaction；For example, influence because Son may include trade cryptographic Hash specific bit, such as the first block chain node can will initial key and transaction cryptographic Hash before Spliced, and Hash fortune is carried out to spliced character string for 16 (or first 32,16 latter, rear 32 or other positions) It calculates, to generate derivative key.

First block chain node can also use asymmetric encryption mode, i.e., with the public key of rivest, shamir, adelman to receipt Content-encrypt, then correspondingly, client can be decrypted in above-mentioned encrypted receipt with the private key of the rivest, shamir, adelman Hold.The key of rivest, shamir, adelman, such as can be and a pair of of public key and private key are generated by client, and public key is sent in advance To the first block chain node, so that the first block chain node can be by the receipt contents public key encryption.

First block chain node is by running the code for realizing a certain function, to realize the function.Therefore, for needing The function to realize in TEE also needs to execute correlative code.And the code for being executed in TEE, it needs to meet TEE Related specifications and requirement；Accordingly for the rule for realizing the code of a certain function, needed in the related technology in conjunction with TEE Model and requirement re-start written in code, and there is only relatively bigger exploitation amounts, and are easy to produce during rewriting Raw loophole (bug) influences the reliability and stability of function realization.

Therefore, the first block chain node can be by executing store function code, the receipts that will be generated in TEE except TEE According to data (including needing the receipt contents of the plaintext version of stored in clear, and the receipt of the ciphertext form that needs ciphertext to store Content) external memory space to except TEE is stored, allow the store function code to be in the related technology for realizing depositing It stores up the code of function, need to re-start written in code in conjunction with the specification and requirement of TEE, can realize peace for receipt data Complete reliable storage, on the basis of not influencing safe and reliable degree, can not only reduce the exploitation amount of correlative code, and TCB (Trusted Computing Base, trusted computing base) can be reduced by reducing the correlative code of TEE, so that TEE During technology and block chain technology are combined, it is additional caused by security risk be in controlled range.

In one embodiment, the first block chain node can execute write buffer function code in TEE, by above-mentioned receipts It is stored in the write buffer in TEE according to data, for example the write buffer can correspond to " caching " as shown in Figure 2.Further, One block chain node exports the data in write buffer from credible performing environment, to store to external memory space.Wherein, it writes slow Depositing function code can be stored in TEE with plaintext version, and the caching function generation of the plaintext version can be directly executed in TEE Code；Or, write buffer function code can be stored in except TEE with ciphertext form, for example it is stored in above-mentioned external memory space (such as " packing+storage " shown in Fig. 2, wherein " packing " indicates the first block chain node except credible performing environment to friendship Easily be packaged blocking), the write buffer function code of the ciphertext form can be read in TEE, be decrypted in TEE as in plain text Code, and execute the plaintext code.

Write buffer refers to when writing data into external memory space, in order to avoid causing " the punching to external memory space Hit " and " buffering " mechanism of offer.For example, can realize above-mentioned write buffer using buffer；Certainly, write buffer can also adopt It is realized with cache, this specification is limited not to this.In fact, due to the security context that TEE is isolation, and it is external Memory space is located at except TEE, so that can carry out batch by using write buffer mechanism to the data in caching and outside is written Memory space promotes data storage efficiency to reduce the interaction times between TEE and external memory space.Meanwhile TEE exists During constantly executing each item transaction, it may be necessary to transfer generated data, be write if the data that need to be called are located exactly at In caching, the data can be directly read from write buffer, on the one hand can reduce the friendship between external memory space in this way Mutually, it on the other hand eliminates to the decrypting process from external memory space data streams read, thus at the data being lifted in TEE Manage efficiency.

It is of course also possible to write buffer be built on except TEE, for example the first block chain node can execute except TEE Write buffer function code, thus by the write buffer outside above-mentioned receipt data deposit TEE, and further by the number in write buffer According to storing to external memory space.

A kind of receipt memory node of combination code mark and transaction, user type of this specification is introduced below in conjunction with Fig. 6 Embodiment, comprising:

Receiving unit 61 receives the transaction for corresponding to intelligent contract by encryption, wraps in the code of the intelligence contract Include the field indicated by exposure identifier；

Decryption unit 62 decrypts the transaction in credible performing environment, obtains the code of the intelligent contract；

Execution unit 63 executes the code of the intelligent contract in the credible performing environment, obtains receipt data；

Determination unit 64 determines corresponding exposure field according to the type of transaction of the transaction；

Storage unit 65 stores the receipt data, when the initiator that trades belongs to pre-set user type, makes the receipt It is deposited in data by the exposure field that the exposed identifier is indicated with plaintext version storage, remaining receipt field with ciphertext form Storage.

Optionally, the corresponding intelligent contract of the received transaction of receiving unit 61, comprising:

The intelligent contract of high level language；Or,

The intelligent contract of bytecode form.

Optionally, when the intelligent contract that the corresponding intelligent contract of the received transaction of receiving unit 61 is high level language When, the node further include:

Compilation unit 66 is compiled by intelligent contract of the compiler to the high level language, generates bytecode The intelligent contract of form, to be executed in the credible performing environment.

Optionally, when the corresponding intelligent contract of the received transaction of receiving unit 61 is the intelligent contract of bytecode form, The intelligent contract of the bytecode form is compiled by client by intelligent contract of the compiler to high level language It obtains, the intelligent contract of the high level language is write to obtain by user in the client.

Optionally, the intelligent contract of the high level language and the intelligent contract of the bytecode form have it is identical or Corresponding exposed identifier.

Optionally, the corresponding intelligent contract of the received transaction of receiving unit 61, comprising:

The intelligent contract that user generates on the first block chain node；Or,

The intelligent contract that user generates on the client；Or,

The intelligent contract in transaction that the client is sent by the second block chain node.

Optionally, the field that the exposed identifier is indicated includes: contract grade field；Storage unit 65 is specifically used for:

When the initiator that trades belongs to pre-set user type and the contract grade field belongs to exposed field, by the receipt All receipt contents in data corresponding to the contract grade field are stored with plaintext version.

Optionally, the field that the exposed identifier is indicated includes: corresponding at least one defined in the intelligent contract The event level field of a event；Storage unit 65 is specifically used for:

When the initiator that trades belongs to pre-set user type and the event level field belongs to exposed field, determine described Correspond to the receipt contents of at least one event in receipt data, and the thing will be corresponded in the receipt contents determined The part of part grade field is stored with plaintext version.

Optionally, the transaction includes type of transaction field, and the value of the type of transaction field is corresponding for indicating Type of transaction.

Optionally, the type of transaction of the transaction includes: to deposit card type, assets transfer type, contract creation type, contract Call type.

Optionally, the mapping relations being stored in block chain between predefined type of transaction and exposure field, it is described to reflect The relationship of penetrating is used for determining the corresponding exposed field of the type of transaction of the transaction.

Optionally, the first block chain node determines user type belonging to the transaction initiator by following manner:

Determine the corresponding external account of the transaction initiator；

The corresponding user type of the external account recorded on inquiry block chain, as belonging to the transaction initiator User type.

Optionally, the external account includes the user type field being recorded on block chain, the user type field Value correspond to the user type.

Optionally, when creating the external account, the user type is configured as association to the external account, makes Incidence relation between the user type and the external account is recorded in block chain.

Optionally, further includes:

Changing unit 67 changes the corresponding user type of the external account according to management Client-initiated change request.

Optionally, storage unit 65 is specifically used for:

The code of reading system contract, define in the code of the system contract with exposure identifier, user type and The relevant receipt data of type of transaction stores logic；

The code of the system contract is executed, with when the transaction initiator belongs to the pre-set user type, by institute It states in receipt data by the exposure field that the exposed identifier is indicated is stored with plaintext version, remaining receipt field is with ciphertext shape Formula storage.

Optionally, the system contract includes: that the preset system contract being recorded in wound generation block or the preset system close System contract after about corresponding update.

Optionally, storage unit 65 is specifically used for:

Store function code is executed except the credible performing environment, and the receipt data is stored to described credible External memory space except performing environment.

Optionally, the transaction is for creating and/or calling the intelligent contract.

Optionally, the key that the first block chain node encrypts the receipt field includes: symmetric encipherment algorithm The key of key or rivest, shamir, adelman.

Optionally, the key of the symmetric encipherment algorithm includes the initial key that the client provides；Or, described symmetrical The key of Encryption Algorithm includes the derivative key that the initial key and impact factor generate.

Optionally, the transaction is encrypted by the initial key, and the initial key is by rivest, shamir, adelman Public key encrypted；Decryption unit 62 is specifically used for:

It is decrypted to obtain the initial key with the private key of the rivest, shamir, adelman, and with the initial key to described Transaction is decrypted to obtain the code of the intelligent contract.

Optionally, the initial key is generated by client；Or, the initial key is sent to by Key Management server The client.

Optionally, the impact factor is related to the transaction.

Optionally, the impact factor includes: the specific bit of the cryptographic Hash of the transaction.

In the 1990s, the improvement of a technology can be distinguished clearly be on hardware improvement (for example, Improvement to circuit structures such as diode, transistor, switches) or software on improvement (improvement for method flow).So And with the development of technology, the improvement of current many method flows can be considered as directly improving for hardware circuit. Designer nearly all obtains corresponding hardware circuit by the way that improved method flow to be programmed into hardware circuit.Cause This, it cannot be said that the improvement of a method flow cannot be realized with hardware entities module.For example, programmable logic device (Programmable Logic Device, PLD) (such as field programmable gate array (Field Programmable Gate Array, FPGA)) it is exactly such a integrated circuit, logic function determines device programming by user.By designer Voluntarily programming comes a digital display circuit " integrated " on a piece of PLD, designs and makes without asking chip maker Dedicated IC chip.Moreover, nowadays, substitution manually makes IC chip, this programming is also used instead mostly " is patrolled Volume compiler (logic compiler) " software realizes that software compiler used is similar when it writes with program development, And the source code before compiling also write by handy specific programming language, this is referred to as hardware description language (Hardware Description Language, HDL), and HDL is also not only a kind of, but there are many kind, such as ABEL (Advanced Boolean Expression Language)、AHDL(Altera Hardware Description Language)、Confluence、CUPL(Cornell University Programming Language)、HDCal、JHDL (Java Hardware Description Language)、Lava、Lola、MyHDL、PALASM、RHDL(Ruby Hardware Description Language) etc., VHDL (Very-High-Speed is most generally used at present Integrated Circuit Hardware Description Language) and Verilog.Those skilled in the art also answer This understands, it is only necessary to method flow slightly programming in logic and is programmed into integrated circuit with above-mentioned several hardware description languages, The hardware circuit for realizing the logical method process can be readily available.

Controller can be implemented in any suitable manner, for example, controller can take such as microprocessor or processing The computer for the computer readable program code (such as software or firmware) that device and storage can be executed by (micro-) processor can Read medium, logic gate, switch, specific integrated circuit (Application Specific Integrated Circuit, ASIC), the form of programmable logic controller (PLC) and insertion microcontroller, the example of controller includes but is not limited to following microcontroller Device: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20 and Silicone Labs C8051F320 are deposited Memory controller is also implemented as a part of the control logic of memory.It is also known in the art that in addition to Pure computer readable program code mode is realized other than controller, can be made completely by the way that method and step is carried out programming in logic Controller is obtained to come in fact in the form of logic gate, switch, specific integrated circuit, programmable logic controller (PLC) and insertion microcontroller etc. Existing identical function.Therefore this controller is considered a kind of hardware component, and to including for realizing various in it The device of function can also be considered as the structure in hardware component.Or even, it can will be regarded for realizing the device of various functions For either the software module of implementation method can be the structure in hardware component again.

System, device, module or the unit that above-described embodiment illustrates can specifically realize by computer chip or entity, Or it is realized by the product with certain function.It is a kind of typically to realize that equipment is computer.Specifically, computer for example may be used Think personal computer, laptop computer, cellular phone, camera phone, smart phone, personal digital assistant, media play It is any in device, navigation equipment, electronic mail equipment, game console, tablet computer, wearable device or these equipment The combination of equipment.

For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.Certainly, implementing this The function of each unit can be realized in the same or multiple software and or hardware when specification.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

This specification can describe in the general context of computer-executable instructions executed by a computer, such as journey Sequence module.Generally, program module include routines performing specific tasks or implementing specific abstract data types, programs, objects, Component, data structure etc..This specification can also be practiced in a distributed computing environment, in these distributed computing environment In, by executing task by the connected remote processing devices of communication network.In a distributed computing environment, program module It can be located in the local and remote computer storage media including storage equipment.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.In a typical configuration, computer includes at one or more Manage device (CPU), input/output interface, network interface and memory.

Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/or The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium Example.

Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data. The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM), Digital versatile disc (DVD) or other optical storage, magnetic cassettes, disk storage, quantum memory, based on graphene Storage medium or other magnetic storage devices or any other non-transmission medium, can be used for storing can be accessed by a computing device Information.As defined in this article, computer-readable medium does not include temporary computer readable media (transitory media), Such as the data-signal and carrier wave of modulation.

It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described want There is also other identical elements in the process, method of element, commodity or equipment.

It is above-mentioned that this specification specific embodiment is described.Other embodiments are in the scope of the appended claims It is interior.In some cases, the movement recorded in detail in the claims or step can be come according to the sequence being different from embodiment It executes and desired result still may be implemented.In addition, process depicted in the drawing not necessarily require show it is specific suitable Sequence or consecutive order are just able to achieve desired result.In some embodiments, multitasking and parallel processing be also can With or may be advantageous.

The term that this specification one or more embodiment uses be only merely for for the purpose of describing particular embodiments, and It is not intended to be limiting this specification one or more embodiment.In this specification one or more embodiment and the appended claims Used in the "an" of singular, " described " and "the" be also intended to including most forms, unless context understands earth's surface Show other meanings.It is also understood that term "and/or" used herein refers to and includes one or more associated list Any or all of project may combine.

It will be appreciated that though this specification one or more embodiment may using term first, second, third, etc. come Various information are described, but these information should not necessarily be limited by these terms.These terms are only used to same type of information area each other It separates.For example, the first information can also be referred to as in the case where not departing from this specification one or more scope of embodiments Two information, similarly, the second information can also be referred to as the first information.Depending on context, word as used in this is " such as Fruit " can be construed to " ... when " or " when ... " or " in response to determination ".

The foregoing is merely the preferred embodiments of this specification one or more embodiment, not to limit this theory Bright book one or more embodiment, all within the spirit and principle of this specification one or more embodiment, that is done is any Modification, equivalent replacement, improvement etc. should be included within the scope of the protection of this specification one or more embodiment.

Claims (28)

1. a kind of receipt storage method of combination code mark and transaction, user type, comprising:

First block chain node receives the transaction for corresponding to intelligent contract by encryption, includes in the code of the intelligence contract The field indicated by exposure identifier；

First block chain node decrypts the transaction in credible performing environment and executes the code of the intelligent contract of acquisition, Obtain receipt data；

First block chain node determines corresponding exposure field according to the type of transaction of the transaction；

First block chain node stores the receipt data, when the initiator that trades belongs to pre-set user type, makes the receipt It is deposited in data by the exposure field that the exposed identifier is indicated with plaintext version storage, remaining receipt field with ciphertext form Storage.

2. according to the method described in claim 1, the corresponding intelligent contract of the received transaction of the first block chain node, comprising:

The intelligent contract of high level language；Or,

The intelligent contract of bytecode form.

3. according to the method described in claim 2, when the corresponding intelligent contract of the received transaction of the first block chain node is advanced When the intelligent contract that language is write, the method also includes:

First block chain node is compiled by intelligent contract of the compiler to the high level language, generates bytecode shape The intelligent contract of formula, to be executed in the credible performing environment.

4. according to the method described in claim 2, when the corresponding intelligent contract of the received transaction of the first block chain node is byte When the intelligent contract of code form, the intelligent contract of the bytecode form is by client by compiler to high level language Intelligent contract, which is compiled, to be obtained, and the intelligent contract of the high level language is write in the client by user It arrives.

5. according to the method described in claim 2, the intelligence of the intelligent contract of the high level language and the bytecode form Energy contract has identical or corresponding exposed identifier.

6. according to the method described in claim 1, the corresponding intelligent contract of the received transaction of the first block chain node, comprising:

The intelligent contract that user generates on the first block chain node；Or,

The intelligent contract that user generates on the client；Or,

The intelligent contract in transaction that the client is sent by the second block chain node.

7. according to the method described in claim 1, the field that the exposed identifier is indicated includes: contract grade field；Firstth area Block chain node stores the receipt data, comprising:

First block chain node in the initiator that trades belongs to pre-set user type and when the contract grade field belongs to exposed field, All receipt contents for corresponding to the contract grade field in the receipt data are stored with plaintext version.

8. according to the method described in claim 1, the field that the exposed identifier is indicated includes: corresponding to the intelligent contract Defined at least one event event level field；First block chain node stores the receipt data, comprising:

First block chain node in the initiator that trades belongs to pre-set user type and when the event level field belongs to exposed field, Determine the receipt contents for corresponding at least one event in the receipt data, and will be right in the receipt contents determined The part of event level field described in Ying Yu is stored with plaintext version.

9. according to the method described in claim 1, the transaction includes type of transaction field, the value of the type of transaction field For indicating corresponding type of transaction.

10. according to the method described in claim 1, the type of transaction of the transaction include: deposit card type, assets transfer type, Contract creates type, contract call type.

11. according to the method described in claim 1, being stored in block chain between predefined type of transaction and exposure field Mapping relations, the mapping relations are used for determining the corresponding exposed field of the type of transaction of the transaction.

12. according to the method described in claim 1, the first block chain node determines transaction initiator institute by following manner The user type of category:

First block chain node determines the corresponding external account of the transaction initiator；

The corresponding user type of the external account recorded on first block chain node interrogation zone block chain, using as the transaction User type belonging to initiator.

13. according to the method for claim 12, the external account includes the user type field being recorded on block chain, The value of the user type field corresponds to the user type.

14. according to the method for claim 12, when creating the external account, the user type is configured as being associated with To the external account, it is recorded in the incidence relation between the user type and the external account in block chain.

15. according to the method for claim 14, further includes:

First block chain node changes the corresponding user type of the external account according to management Client-initiated change request.

16. according to the method described in claim 1, the first block chain node stores the receipt data, comprising:

First block chain node reads the code of system contract, define in the code of the system contract with exposure identifier, User type and the relevant receipt data of type of transaction store logic；

First block chain node executes the code of the system contract, to belong to the pre-set user class in the transaction initiator When type, it will be stored in the receipt data by the exposure field that the exposed identifier is indicated with plaintext version, remaining receipt word Section is stored with ciphertext form.

17. according to the method for claim 16, the system contract includes: that the preset system being recorded in wound generation block closes System contract about or after the corresponding update of the preset system contract.

18. according to the method described in claim 1, the first block chain node stores the receipt data, comprising:

First block chain node executes store function code except the credible performing environment, and the receipt data is stored External memory space except to the credible performing environment.

19. according to the method described in claim 1, the transaction is for creating and/or calling the intelligent contract.

20. according to the method described in claim 1, the key packet that the first block chain node encrypts the receipt field It includes: the key of symmetric encipherment algorithm or the key of rivest, shamir, adelman.

21. according to the method for claim 20, the key of the symmetric encipherment algorithm includes the first of the client offer Beginning key；Or, the key of the symmetric encipherment algorithm includes the derivative key that the initial key and impact factor generate.

22. according to the method for claim 21, the transaction is encrypted by the initial key, and the initial key It is encrypted by the public key of rivest, shamir, adelman；First block chain node is decrypted in credible performing environment in the transaction The code of the intelligence contract, comprising:

First block chain node decrypts to obtain the initial key with the private key of the rivest, shamir, adelman, and with described initial Transaction described in key pair is decrypted to obtain the code of the intelligent contract.

23. according to the method for claim 21, the initial key is generated by client；Or, the initial key is by close Key management server is sent to the client.

24. according to the method for claim 21, the impact factor is related to the transaction.

25. according to the method for claim 24, the impact factor includes: the specific bit of the cryptographic Hash of the transaction.

26. a kind of receipt memory node of combination code mark and transaction, user type, comprising:

Receiving unit receives the transaction for corresponding to intelligent contract by encryption, includes passing through in the code of the intelligence contract The field that exposure identifier is indicated；

Decryption unit decrypts the transaction in credible performing environment, obtains the code of the intelligent contract；

Execution unit executes the code of the intelligent contract in the credible performing environment, obtains receipt data；

Determination unit determines corresponding exposure field according to the type of transaction of the transaction；

Storage unit stores the receipt data, when the initiator that trades belongs to pre-set user type, makes in the receipt data It is stored by the exposure field that the exposed identifier is indicated with plaintext version storage, remaining receipt field with ciphertext form.

27. a kind of electronic equipment, comprising:

Processor；

Memory for storage processor executable instruction；

Wherein, the processor is by running the executable instruction to realize the side as described in any one of claim 1-25 Method.

28. a kind of computer readable storage medium, is stored thereon with computer instruction, realized such as when which is executed by processor The step of any one of claim 1-25 the method.