CN113408259B - Method, system, device and storage medium for filling in file based on blockchain - Google Patents
Method, system, device and storage medium for filling in file based on blockchain Download PDFInfo
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- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
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Abstract
The application relates to a method, a system, a device and a storage medium for filling in a file based on a blockchain, wherein the method comprises the following steps: based on intelligent contracts deployed on the blockchain, corresponding template files are manufactured according to preset data elements and preset visual patterns described by demand information, interactive form fields in the template files are filled in, format files are generated, the format files are stored in a node account book of the blockchain after being encoded, the problems that data are unsafe and operation is complicated in filling of the format files in the related art are solved, the interactive forms are filled in the template files directly through the blockchain without repeated operation through a plurality of systems, operation complexity of users is reduced, intermediate circulation links are reduced, the filled-in format files are stored directly and/or indirectly through the blockchain, and information safety and privacy are further guaranteed based on a non-tamperable and traceable mechanism of the blockchain.
Description
Technical Field
The application relates to the technical field of electronic contracts, in particular to a method, a system, a device and a storage medium for filling in documents based on blockchain.
Background
When a traditional user issues an invoice and signs a contract on line, a piece of paper material is usually printed in advance, and then relevant information is filled in the paper material. With the development of digital economy and popularization of electronics, data telegrams such as electronic invoices, electronic contracts, electronic insurance policies and electronic medical records are commonly used for replacing paper media. The electronic invoice is characterized in that data elements and visual patterns describing the electronic invoice are usually manufactured into a template file of the electronic invoice; like an electronic contract, format terms are pre-formulated for reuse. And the user needs to submit information to the third-party centralized service platform according to the template file or the format clause instead of directly combining the information with the template file, so that the related operation not only increases the operation burden of the user, but also has the risks of tampered information and leaked privacy.
At present, effective solutions are not proposed for solving the problems of unsafe data and complicated operation in filling of format files in the related technology.
Disclosure of Invention
The embodiment of the application provides a method, a system, a device and a storage medium for filling files based on a blockchain, which at least solve the problems of unsafe data and complicated operation in filling format files in the related technology.
In a first aspect, an embodiment of the present application provides a method for filling in a file based on a blockchain, the method including:
generating a template file through intelligent contracts deployed on a blockchain according to preset data elements and preset visual patterns;
storing, by storage logic in the intelligent contract, the template file in a node ledger of the blockchain;
acquiring key value pair data, and checking the key value pair data and preset data elements of the template file through checking logic in the intelligent contract;
Writing the key value pair data into a form value corresponding to the template file through the intelligent contract according to preset data elements of the template file, and generating a format file;
Encrypting the layout file through encryption logic in the intelligent contract to generate a layout encryption file of the layout file;
And storing the layout encryption file in a node ledger of the blockchain through storage logic in the intelligent contract.
In some embodiments, obtaining key value pair data, and verifying, by verification logic in the smart contract, the key value pair data and a preset data element of the template file includes:
Obtaining key value pair data, calling an intelligent contract deployed on the blockchain to preset check the key value pair data according to constraint conditions of the preset data elements set in a key name retrieval template file, and preset setting the key value pair data based on the constraint conditions, wherein the preset check comprises check data content and check data length, and the preset setting comprises setting data arrangement, setting data fonts and setting data word sizes.
In some of these embodiments, encrypting the layout file by encryption logic in the smart contract, generating a layout encrypted file for the layout file includes:
And carrying out Base64 coding on the format file through encryption logic in the intelligent contract, and carrying out symmetric or asymmetric encryption on the format file after the Base64 coding to generate a format encryption file.
In some of these embodiments, storing, by the storage logic in the smart contract, the layout encryption file in a node ledger of the blockchain includes:
And carrying out data segmentation on the layout encryption file through storage logic in the intelligent contract, generating a corresponding data subset, and storing the data subset in a node account book of the blockchain.
In some of these embodiments, after encrypting the layout file by encryption logic in the smart contract to generate a layout encrypted file for the layout file, the method further comprises:
And carrying out hash operation on the format encryption file to generate a corresponding hash value, storing the hash value in a node account book of the blockchain through storage logic in the intelligent contract, and storing the format encryption file in a centralized storage system or a distributed file storage system.
In some of these embodiments, after generating the template file from the preset data elements and the preset visualization patterns by the smart contracts deployed on the blockchain, the method further includes:
And processing the template file according to a preset algorithm to generate a corresponding digital abstract, storing the digital abstract in a node account book of the blockchain through storage logic in the intelligent contract, and storing the template file in a centralized storage system or a distributed file storage system.
In some of these embodiments, prior to storing the template file in the node ledger of the blockchain by storage logic in the smart contract, the method further includes:
and performing Base64 coding on the template file through the intelligent contract on the blockchain.
In a second aspect, an embodiment of the present application provides a blockchain-based document filling system, where the system includes an intelligent contract module and a node ledger module;
The intelligent contract module generates a template file according to preset data elements and preset visual patterns;
The intelligent contract module stores the template file in the node account book module through storage logic;
The intelligent contract module acquires key value pair data, and verifies the key value pair data and preset data elements of the template file through verification logic;
The intelligent contract module writes the key value pair data into a form value corresponding to the template file according to preset data elements of the template file, and generates a format file;
the intelligent contract module encrypts the format file through encryption logic to generate a format encrypted file of the format file;
and the intelligent contract module stores the layout encryption file in the node account book module through storage logic.
In a third aspect, an embodiment of the present application provides an electronic device, including a memory and a processor, where the memory stores a computer program, and the processor implements the method according to the first aspect when executing the computer program.
In a fourth aspect, an embodiment of the present application provides a storage medium having a computer program stored therein, where the computer program when executed by a processor implements a method for filling out a file based on a blockchain as described in the first aspect above.
Compared with the related art, the method, the system, the device and the storage medium for filling the file based on the blockchain are provided, the template file is generated through the intelligent contracts deployed on the blockchain according to the preset data elements and the preset visual patterns, the template file is stored in the node account book of the blockchain through the storage logic in the intelligent contracts, the key value pair data is acquired, the key value pair data and the preset data elements of the template file are verified through the verification logic in the intelligent contracts, the key value pair data is written into the form values corresponding to the template file according to the preset data elements of the template file, the format file is generated through the encryption logic in the intelligent contracts, the format encryption file of the format file is generated, the format encryption file is stored in the node account book of the blockchain through the storage logic in the intelligent contracts, the problems that the format file is unsafe and complex in operation are solved, the interactive form is directly filled in the template file through the blockchain without repeated operation of a plurality of systems, the complexity of users is reduced, the format can be directly filled back and forth, and the privacy can be further tampered through the system, and the system can be further filled out, and the privacy can be further guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a method of creating a smart contract;
FIG. 2 is a schematic diagram of a method of invoking a smart contract;
FIG. 3 is a schematic diagram of a method of creating a smart contract and invoking a smart contract;
FIG. 4 is a flow chart of steps of an electronic invoice generation and filling method according to the related art;
FIG. 5 is a flow chart of steps of an electronic contract generation and filling method according to the related art;
FIG. 6 is a simplified flowchart of steps of a blockchain-based method of filling in documents in accordance with an embodiment of the present application;
FIG. 7 is a flowchart of steps for a blockchain-based method of filling in documents in accordance with an embodiment of the present application;
FIG. 8 is a block diagram of a blockchain-based fill-in file system in accordance with an embodiment of the application;
fig. 9 is a schematic diagram of an internal structure of an electronic device according to an embodiment of the present application.
Description of the drawings: 81. an intelligent contract module; 82. and a node account book module.
Detailed Description
The present application will be described and illustrated with reference to the accompanying drawings and examples in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided by the present application without making any inventive effort, are intended to fall within the scope of the present application.
It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the described embodiments of the application can be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "a," "an," "the," and similar referents in the context of the application are not to be construed as limiting the quantity, but rather as singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in connection with the present application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.
Blockchains are generally divided into three types: public chain (Public Blockchain), private chain (PrivateBlockchain) and federated chain (Consortium Blockchain). In addition, there may be combinations of the above types, such as private chain+federation chain, federation chain+public chain, and the like.
Among them, the highest degree of decentralization is the public chain. The public chain is represented by bitcoin, ethernet, and participants joining the public chain (also referred to as nodes in the blockchain) can read data records on the chain, participate in transactions, and compete for accounting rights for new blocks, etc. Moreover, each node can freely join or leave the network and perform relevant operations.
The private chain is the opposite, the write rights of the network are controlled by an organization or organization, and the data read rights are specified by the organization. In short, the private chain may be a weakly centralized system with strict restrictions on the nodes and a small number of nodes. This type of blockchain is more suitable for use within a particular organization.
The alliance chain is a block chain between public and private chains, and can realize 'partial decentralization'. Each node in the federation chain typically has an entity organization or organization corresponding thereto; nodes join the network by authorization and form a benefit-related federation, which collectively maintains blockchain operation.
Based on the basic characteristics of a blockchain, a blockchain is typically made up of several blocks. The time stamps corresponding to the creation time of the block are recorded in the blocks respectively, and all the blocks form a time-ordered data chain strictly according to the time stamps recorded in the blocks.
For real data generated in the physical world, the real data can be constructed into a standard transaction (transaction) format supported by a blockchain, then the transaction is issued to the blockchain, the node equipment in the blockchain performs consensus processing on the received transaction, and after the consensus is achieved, the node equipment serving as an accounting node in the blockchain packages the transaction into a block, and the persistence is performed in the blockchain.
Among other things, the consensus algorithm supported in the blockchain may include:
A first type of consensus algorithm, namely a consensus algorithm that node equipment needs to contend for the accounting rights of the accounting period of each round; for example, consensus algorithms such as Proof of Work (POW), proof of equity (POS), proof of commission (DELEGATED PROOF OF STAKE, DPOS);
a second type of consensus algorithm, namely a consensus algorithm which pre-elects accounting nodes (without competing for accounting rights) for each round of accounting period; for example, a consensus algorithm such as Bayesian fault tolerance (PRACTICAL BYZANTINE FAULT TOLERANCE, PBFT) is used.
In blockchain networks employing a first type of consensus algorithm, node devices competing for accounting rights may perform a transaction after receiving the transaction. One of the node devices competing for the accounting rights may win out of the process of competing for the accounting rights in this round, becoming an accounting node. The accounting node may package the received transaction with other transactions to generate the latest chunk and send the generated latest chunk or chunks of the latest chunk to other node devices for consensus.
In blockchain networks employing a second type of consensus algorithm, node devices with accounting rights are already well-established prior to this round of accounting. Thus, after receiving a transaction, the node device may send the transaction to the billing node if it is not itself the billing node for the current round. For the billing node of the present round, the transaction may be performed during or before packaging the transaction with other transactions to generate the latest block. After generating the latest block, the accounting node may send the latest block or the block head of the latest block to other node devices for consensus.
As described above, regardless of which consensus algorithm is used by the blockchain as shown above, the accounting node of the round may package the received transaction to generate the latest chunk and send the generated latest chunk or chunks of the latest chunk to other node devices for consensus verification. If the other node equipment receives the latest block or the block head of the latest block, and is verified to have no problem, the latest block can be added to the end of the original blockchain, so that the accounting process of the blockchain is completed. Other nodes may also execute transactions contained in the block during the verification of the new block or block header from the accounting node.
In the blockchain domain, an important concept is Account (Account); taking an ethernet as an example, the ethernet generally divides accounts into two types, an external account and a contract account; the external account is an account directly controlled by the user, and is also called a user account; the contract account is an account (i.e., smart contract) that is created by the user through an external account and contains a contract code. Of course, for some blockchain projects (such as ant blockchains) derived from the ethernet-based architecture, the account types supported by the blockchains can be further expanded, which is not particularly limited in this specification.
For accounts in a blockchain, the account status of the account is typically maintained by a structure. When a transaction in a block is executed, the status of the account in the blockchain associated with the transaction will typically change.
Taking ethernet as an example, the structure of an account typically includes fields such as Balance, nonce, code, and Storage. Wherein:
a Balance field for maintaining a current account Balance of the account;
A Nonce field for maintaining a number of transactions for the account; the counter is used for guaranteeing that each transaction can be processed only once, and effectively avoiding replay attack;
A Code field for maintaining a contract Code for the account; in practical applications, only the hash value of the contract Code is usually maintained in the Code field; thus, the Code field is also commonly referred to as Codehash field.
A Storage field for maintaining the stored contents of the account (default field value is null); for a contract account, a separate storage space is generally allocated to store the storage content of the contract account; this separate storage space is commonly referred to as the account store for the contract account. The stored content of the contract account is stored in the independent storage space by a data structure which is generally constructed into MPT (MerklePatriciaTrie) trees; among them, the MPT tree constructed based on the stored contents of the contract account is also commonly referred to as Storage tree. Whereas the Storage field typically only maintains the root node of the Storage tree; thus, the Storage field is also commonly referred to as StorageRoot field.
For the external account, the field values of the Code field and the Storage field shown above are null values.
Furthermore, in practical applications, whether public, private or federated, it is possible to provide Smart contract (Smart contract) functionality. Intelligent contracts on a blockchain are contracts on a blockchain that can be executed by a transaction trigger. The smart contracts may be defined in the form of codes.
Taking the ethernet as an example, a user is supported to create and invoke some complex logic in the ethernet network. The ethernet is used as a programmable blockchain, and the core of the ethernet is an Ethernet Virtual Machine (EVM), and each ethernet node can run the EVM. EVM is a graphics-based virtual machine through which various complex logic can be implemented. The user's issuing and invoking of the smart contract in the ethernet is running on the EVM. In fact, the EVM runs directly on virtual machine code (virtual machine bytecode, hereinafter "bytecode"), so the smart contract deployed on the blockchain may be bytecode.
FIG. 1 is a schematic diagram of a method for creating a smart contract, as shown in FIG. 1, where Bob sends a Transaction (Transaction) containing information for creating a smart contract to an Ethernet network, and each node can execute the Transaction in the EVM. In fig. 1, the From field of the transaction is used To record an address of an account initiating creation of an intelligent contract, the contract code stored by the field value of the Data field of the transaction may be a byte code, and the field value of the To field of the transaction is a null account. After agreement is reached between nodes through the consensus mechanism, the intelligent contract is successfully created, and the subsequent user can call the intelligent contract.
After the intelligent contract is created, a contract account corresponding to the intelligent contract appears on the blockchain and has a specific address; for example, "0x68e12cf284 …" in each node in FIG. 1 represents the address of this contract account created; the contract Code (Code) and the account store (Storage) will be saved in the account store of the contract account. The behavior of the smart contract is controlled by the contract code, and the account store of the smart contract maintains the state of the contract. In other words, the smart contract causes a virtual account to be generated on the blockchain that includes the contract code and account store.
The foregoing mentions that the Data field containing the transaction that created the smart contract holds may be the bytecode of the smart contract. Bytecode consists of a series of bytes, each of which can identify an operation. Based on various aspects of development efficiency, readability and the like, a developer can select a high-level language to write intelligent contract codes instead of directly writing byte codes. For example, a high-level language such as Solidity, serpent, LLL language may be employed. For smart contract code written in a high-level language, it may be compiled by a compiler to generate bytecodes that may be deployed onto a blockchain.
Taking Solidity language as an example, the contract code written with it is very similar to classes (classes) in object-oriented programming languages, and multiple members can be declared in a contract, including state variables, functions, function modifiers, events, and so on. The state variable is a value permanently stored in an account store (Storage) field of the smart contract for saving the state of the contract.
Fig. 2 is a schematic diagram of a method for invoking a smart contract, as shown in fig. 2, taking ethernet as an example, bob sends a transaction containing information of invoking the smart contract to the ethernet network, and each node may execute the transaction in the EVM. The From field of the transaction in fig. 2 is used for recording the address of the account initiating the call of the smart contract, the To field is used for recording the address of the called smart contract, and the Data field of the transaction is used for recording the method and parameters for calling the smart contract. After invoking the smart contract, the account status of the contract account may change. Subsequently, a client may view the account status of the contract account through the accessed blockchain node (e.g., node 1 in FIG. 2).
The intelligent contract can be independently executed at each node in the blockchain network in a specified mode, all execution records and data are stored on the blockchain, so that when the transaction is executed, transaction credentials which cannot be tampered and cannot be lost are stored on the blockchain.
FIG. 3 is a schematic diagram of a method of creating a smart contract and invoking the smart contract, as shown in FIG. 3. To create an intelligent contract in the ethernet, the intelligent contract needs to be written, changed into byte codes, deployed to a blockchain and the like. The intelligent contract is called in the Ethernet, a transaction pointing to the intelligent contract address is initiated, EVM of each node can execute the transaction respectively, and intelligent contract codes are distributed and run in the virtual machine of each node in the Ethernet network.
In the related art, an electronic invoice usually makes a data element and a visual style describing the electronic invoice into a template file of the electronic invoice; the format terms are pre-formulated like an electronic contract to achieve the purpose of repeated use. The operation flow is commonly called as sample preparation, and in the subsequent use process, only the information is filled in the format file provided by the sample preparation.
Taking an electronic invoice as an example, fig. 4 is a flowchart of steps of an electronic invoice generating and filling method according to the related art, as shown in fig. 4, the method includes the steps of:
S402, manufacturing and forming an electronic bill template file according to the data elements and the visual patterns of the electronic bill;
S404, the billing platform presents according to the template file by using HTML and other technologies and according to the pattern of the template file, and collects the information to be filled in a form and other modes;
s406, combining the filled information with the template file to form a new format file, typically a PDF format file;
s408, the tax bureau, the issuing organization and the like sign by using the digital certificate to generate a new version file of the electronic invoice.
Taking an electronic contract as an example, fig. 5 is a flowchart of steps of an electronic contract generating and filling method according to the related art, as shown in fig. 5, the method including the steps of:
S502, one party pre-formulates format terms, and typesetting is carried out through editing software such as Microsoft Word or WPS, so as to generate a reusable template file;
S504, converting the template file into a format file in a PDF format, and uploading the format file to a third party signing platform. Or directly uploading the edited template file, and performing format conversion through a third party signing platform;
S506, opening the uploaded file at the third party signing platform, dragging the form on the interface, placing the form at the position to be filled in, and reproducing the template file. Storing the corresponding information into a centralized database of the third party subscription platform;
S508, the user invokes the template file information stored in the centralized database at the third-party signing platform, fills relevant information in the corresponding form and submits the information to the third-party signing platform;
S510, the third-party signing platform generates a new layout file according to the information submitted by the user for subsequent signing operation.
After the relevant template files are formulated according to the service requirements of the user through the steps S402 to S408 and the steps S502 to S510 in the related technology, the user does not directly use the template files to fill in the content in the actual filling process, but performs secondary operation of the third-party centralized service platform, the user inputs the information into the third-party centralized service platform, and the third-party centralized service platform combines the information input by the third-party centralized service platform with the template files to generate the format files required by the user.
Therefore, after the independent third-party software such as Microsoft Word or WPS is used for editing the template, other third-party product services are used for writing the information to be filled in, the inconsistency of the multi-party systems leads to the complicated operation of users in the process, and the information security and privacy protection strategies of all the parties are invisible.
Therefore, a method for directly filling out the layout file is needed by the user to solve the complex operations in the middle and the potential information security and privacy risks.
An embodiment of the present application provides a method for filling out a file based on a blockchain, and fig. 6 is a flowchart illustrating the steps of the method for filling out a file based on a blockchain according to an embodiment of the present application, as shown in fig. 6, and the method includes the following steps:
s602, manufacturing a corresponding template file according to the data elements and the visual patterns described by the requirement information;
S604, filling in an interactive form field in the template file to generate a format file;
S606, the format file is stored in a node account book of the blockchain after being encoded.
The operation flows related to the embodiment of the application are all realized through the blockchain intelligent contract, and do not relate to any centralized system, so that the consistency and the safety of user operation and the privacy protection of the user operation are solved.
An embodiment of the present application provides a method for filling out a file based on a blockchain, and fig. 7 is a flowchart of steps of the method for filling out a file based on a blockchain according to an embodiment of the present application, as shown in fig. 7, and the method includes the following steps:
s702, generating a template file through intelligent contracts deployed on a blockchain according to preset data elements and preset visual patterns;
s704, storing the template file in a node account book of the blockchain through storage logic in the intelligent contract;
s706, acquiring key value pair data, and checking the key value pair data and preset data elements of the template file through checking logic in the intelligent contract;
s708, writing key value pair data into form values corresponding to the template file through an intelligent contract according to preset data elements of the template file, and generating a format file;
S710, encrypting the layout file through encryption logic in the intelligent contract to generate a layout encryption file of the layout file;
S712, storing the layout encryption file in the node ledger of the blockchain through storage logic in the intelligent contract.
It should be noted that the preset data elements are described using an interactive form field. The so-called interactive form, also called AcroForm, is a set of domains that interactively collect information from users. The template file may contain any number of fields that appear on any combination of pages, all of which constitute a single, integral interactive form that covers the entire document. Any non-illustrated use of form is understood to refer to an interactive form.
The interactive form supports the following domain types:
button fields represent interactive controls that a user can operate with a mouse on a screen, including ordinary buttons, check boxes, and radio buttons;
a text field is a box or area in which a user can enter text using a keyboard;
The options field contains several text items, at most one of which can be selected as a field value. The options field includes a scroll drop down list box and a combo box;
the signature field represents a digital signature and optional data that authenticates the signer name and document content.
The preset visual style includes the length and width, resolution, the page of the text, image, interactive form, etc. of the template file, the position, size, frame, color, etc. of the page.
The template file may be generated by other manners besides the intelligent contract deployed on the blockchain, and this embodiment will not be described in detail here
The steps S702 to S712 in the embodiment of the application solve the problems of unsafe data and complicated operation in filling the format file, realize filling the interactive form on the template file directly through the blockchain without repeated operation through a plurality of systems, reduce the operation complexity of a user, reduce intermediate circulation links, directly and/or indirectly store the filled format file through the blockchain, and further guarantee the information safety and privacy based on the non-tamperable and traceable mechanism of the blockchain.
In some embodiments, S706, obtaining the key pair data, and verifying, by the verification logic in the smart contract, the key pair data and the preset data element of the template file includes:
Obtaining key value pair data, calling intelligent contracts deployed on a blockchain to preset check the key value pair data according to constraint conditions of preset data elements set in a key name retrieval template file, and preset setting the key value pair data based on the constraint conditions, wherein the preset check comprises checking data content and checking data length, and the preset setting comprises setting data arrangement, setting data fonts and setting data word sizes.
In some of these embodiments, step S710, encrypting the layout file by encryption logic in the smart contract, generating a layout encrypted file for the layout file includes:
and carrying out Base64 encoding on the format file through encryption logic in the intelligent contract, and carrying out symmetric or asymmetric encryption on the format file after the Base64 encoding to generate a format encryption file.
In some of these embodiments, step S712, storing the layout encryption file in the node ledger of the blockchain by the storage logic in the smart contract includes:
And carrying out data segmentation on the layout encryption file through storage logic in the intelligent contract, generating a corresponding data subset, and storing the data subset in a node account book of the blockchain.
In some embodiments, in step S710, after encrypting the layout file by the encryption logic in the smart contract to generate the layout encrypted file of the layout file, the method further includes:
and carrying out hash operation on the format encrypted file to generate a corresponding hash value, storing the hash value in a node account book of a blockchain through storage logic in an intelligent contract, and storing the format encrypted file in a centralized storage system or a distributed file storage system.
In some of these embodiments, after generating the template file by the smart contract deployed on the blockchain according to the preset data elements and the preset visualization style at step S702, the method further includes:
And processing the template file according to a preset algorithm, generating a corresponding digital abstract, storing the digital abstract in a node account book of a blockchain through storage logic in an intelligent contract, and storing the template file in a centralized storage system or a distributed file storage system.
In some of these embodiments, before storing the template file in the node ledger of the blockchain by the storage logic in the smart contract at step S704, the method further includes:
Base64 encoding of the template file is performed by intelligent contracts on the blockchain.
It should be noted that the steps illustrated in the above-described flow or flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flow diagrams, in some cases, the steps illustrated or described may be performed in an order other than that illustrated herein.
An embodiment of the present application provides a blockchain-based system for filling out documents, and fig. 8 is a block diagram of a blockchain-based system for filling out documents according to an embodiment of the present application, as shown in fig. 8, and includes an intelligent contract module 81 and a node ledger module 82;
the intelligent contract module 81 generates a template file according to the preset data elements and the preset visual patterns;
the intelligent contract module 81 stores the template file in the node ledger module 82 through the storage logic;
The intelligent contract module 81 acquires the key value pair data, and verifies the key value pair data and preset data elements of the template file through verification logic;
the intelligent contract module 81 writes key value pair data into form values corresponding to the template file according to preset data elements of the template file, and generates a format file;
The intelligent contract module 81 encrypts the layout file through encryption logic to generate a layout encrypted file of the layout file;
The smart contract module 81 stores the layout encryption file in the node ledger module 82 through storage logic.
According to the embodiment of the application, the intelligent contract module 81 generates the template file according to the preset data elements and the preset visual style, the template file is stored in the node account module 82 of the blockchain through the storage logic, the key value pair data is acquired, the key value pair data and the preset data elements of the template file are verified through the verification logic, the key value pair data are written into the form values corresponding to the template file according to the preset data elements of the template file, the format file is generated, the encryption logic is used for encrypting the format file, the format encryption file of the format file is generated, the format encryption file is stored in the node account module 82 of the blockchain through the storage logic, the problems of unsafe data and complex operation of filling the format file are solved, the interactive form is directly filled in the template file through the blockchain without repeated operation through a plurality of systems, the operation complexity of users is reduced, the intermediate circulation links are reduced, the completed format file is directly and/or indirectly stored through the blockchain, and the privacy information can be further ensured by the aid of the blockchain.
The above-described respective modules may be functional modules or program modules, and may be implemented by software or hardware. For modules implemented in hardware, the various modules described above may be located in the same processor; or the above modules may be located in different processors in any combination.
The present embodiment also provides an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
The electronic device may further include a transmission device connected to the processor, and an input/output device connected to the processor.
It should be noted that, specific examples in this embodiment may refer to examples described in the foregoing embodiments, and this embodiment is not described herein again.
In addition, in combination with the method for filling out the file based on the blockchain in the embodiment, the embodiment of the application can be realized by providing a storage medium. The storage medium has a computer program stored thereon; the computer program, when executed by a processor, implements a blockchain-based method of filling in documents in any of the above embodiments.
In one embodiment, a computer device is provided, which may be a terminal. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program, when executed by a processor, implements a method of filling out documents based on blockchain. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
In one embodiment, fig. 9 is a schematic diagram of an internal structure of an electronic device according to an embodiment of the present application, and as shown in fig. 9, there is provided an electronic device, which may be a server, and an internal structure diagram of which may be shown in fig. 9. The electronic device includes a processor, a network interface, an internal memory, and a non-volatile memory connected by an internal bus, where the non-volatile memory stores an operating system, computer programs, and a database. The processor is used for providing computing and control capabilities, the network interface is used for communicating with an external terminal through a network connection, the internal memory is used for providing an environment for the operation of an operating system and a computer program, when the computer program is executed by the processor, the method for filling in files based on the blockchain is realized, and the database is used for storing data.
It will be appreciated by those skilled in the art that the structure shown in fig. 9 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the electronic device to which the present application is applied, and that a particular electronic device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SYNCHLINK) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It should be understood by those skilled in the art that the technical features of the above-described embodiments may be combined in any manner, and for brevity, all of the possible combinations of the technical features of the above-described embodiments are not described, however, they should be considered as being within the scope of the description provided herein, as long as there is no contradiction between the combinations of the technical features.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (8)
1. A method for filling out a file based on a blockchain, the method comprising:
generating a template file through an intelligent contract deployed on a blockchain according to preset data elements and preset visual patterns, wherein the preset visual patterns comprise the length, width and resolution of the template file, the page where a text, an image and an interactive form are located and the position and the size of the page where the text, the image and the interactive form are located;
storing, by storage logic in the intelligent contract, the template file in a node ledger of the blockchain;
acquiring key value pair data, and checking the key value pair data and preset data elements of the template file through checking logic in the intelligent contract;
Writing the key value pair data into a form value corresponding to the template file through the intelligent contract according to preset data elements of the template file, and generating a format file;
performing Base64 encoding on the format file through encryption logic in the intelligent contract, and performing symmetric or asymmetric encryption on the format file after the Base64 encoding to generate a format encryption file;
Performing hash operation on the format encrypted file to generate a corresponding hash value, storing the hash value in a node account book of the blockchain through storage logic in the intelligent contract, and storing the format encrypted file in a centralized storage system or a distributed file storage system;
And storing the layout encryption file in a node ledger of the blockchain through storage logic in the intelligent contract.
2. The method of claim 1, wherein obtaining key pair data, and verifying, by verification logic in the smart contract, the key pair data with the preset data elements of the template file comprises:
Obtaining key value pair data, calling an intelligent contract deployed on the blockchain to preset check the key value pair data according to constraint conditions of the preset data elements set in a key name retrieval template file, and preset setting the key value pair data based on the constraint conditions, wherein the preset check comprises check data content and check data length, and the preset setting comprises setting data arrangement, setting data fonts and setting data word sizes.
3. The method of claim 1, wherein storing, by storage logic in the smart contract, the layout encrypted file in a node ledger of the blockchain comprises:
And carrying out data segmentation on the layout encryption file through storage logic in the intelligent contract, generating a corresponding data subset, and storing the data subset in a node account book of the blockchain.
4. The method of claim 1, wherein after generating the template file by the smart contract deployed on the blockchain according to the preset data elements and the preset visualization style, the method further comprises:
And processing the template file according to a preset algorithm to generate a corresponding digital abstract, storing the digital abstract in a node account book of the blockchain through storage logic in the intelligent contract, and storing the template file in a centralized storage system or a distributed file storage system.
5. The method of claim 1, wherein prior to storing the template file in a node ledger of the blockchain by storage logic in the smart contract, the method further comprises:
and performing Base64 coding on the template file through the intelligent contract on the blockchain.
6. A system for filling out documents based on a blockchain is characterized by comprising an intelligent contract module and a node account book module;
the intelligent contract module generates a template file according to preset data elements and preset visual patterns, wherein the preset visual patterns comprise the length, width and resolution of the template file, the page where a text, an image and an interactive form are located and the position and the size of the page where the text, the image and the interactive form are located;
The intelligent contract module stores the template file in the node account book module through storage logic;
The intelligent contract module acquires key value pair data, and verifies the key value pair data and preset data elements of the template file through verification logic;
The intelligent contract module writes the key value pair data into a form value corresponding to the template file according to preset data elements of the template file, and generates a format file;
the intelligent contract module performs Base64 encoding on the format file through encryption logic, performs symmetric or asymmetric encryption on the format file after the Base64 encoding, and generates a format encryption file; performing hash operation on the format encrypted file to generate a corresponding hash value, storing the hash value in a node account book of the blockchain through storage logic in the intelligent contract, and storing the format encrypted file in a centralized storage system or a distributed file storage system;
and the intelligent contract module stores the layout encryption file in the node account book module through storage logic.
7. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the blockchain-based filling out method of any of claims 1 to 5.
8. A storage medium having a computer program stored therein, wherein the computer program is configured to perform the blockchain-based filling method of any of claims 1 to 5 at run-time.
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| CN114492355B (en) * | 2021-12-30 | 2023-03-24 | 博思数采科技发展有限公司 | Method and system for generating electronic bidding invitation letter and response receipt letter in OFD format |
| CN115002141B (en) * | 2022-06-06 | 2024-04-12 | 上海加密原生科技有限公司 | File storage method and device based on block chain |
| CN115017877B (en) * | 2022-08-10 | 2022-10-11 | 佳瑛科技有限公司 | Storage method of layout file and local reconstruction method of sample database |
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