Virtual space nursing home ecosystem and method based on block chain

Abstract

The invention discloses a virtual space nursing home ecosystem and method based on a block chain, and relates to the technical field of block chains, and the method comprises the steps: mortgage an initial token to generate a space auction permission; the service party with the space auction permission receives the nursing demand instruction, submits an encrypted space quotation packet responding to the requirement of the three-dimensional space equipment, and generates a to-be-decided log; triggering the virtual space experience token signature of the elderly user by using the log to be decided, and generating a space authorization board; judging based on a risk identifier embedded in the space authorization board, and triggering verification of a family member supervision token; associating the verified supervision token signature with a space authorization token to generate a space execution token; and activating a virtual space service task through the space execution token, and capturing and generating a behavior track voucher of a block chain evidence by using space motion. According to the invention, multi-dimensional attribute comparison and dynamic matching sorting are carried out on the encrypted space quotation package through the particle swarm optimization algorithm, and intelligent optimization of the nursing service response scheme is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blockchain, in particular to a virtual space nursing home ecological system and method based on blockchain. BACKGROUND

[0002] Under the background of deep integration of virtual space and blockchain technology, the pension service mode is gradually evolving towards decentralization and intelligentization. In recent years, with the development of virtual reality, Internet of Things and distributed ledger technology, virtual space pension service systems based on blockchain have gradually become a research hotspot. Virtual space pension service systems usually use smart contracts to realize automatic matching and execution of service requests, and use the non-tamperable characteristics of blockchain to ensure the reliable recording of service data. Some existing technologies have tried to combine service credit rating, token incentive mechanism and virtual space task scheduling to build a preliminary decentralized care service ecology.

[0003] Although the existing technology has made some progress in service scheduling and data storage, there is still room for improvement in service access mechanism and risk control during execution. In particular, there is a lack of effective mechanisms for dynamic capability verification of service providers and traceable supervision of service execution behavior, making it difficult to balance service matching accuracy and user safety assurance level. Existing virtual space pension services usually use static qualification certification and centralized log recording methods to manage service processes. This approach has problems such as long review period, low data credibility and difficulty in dispute evidence collection when facing dynamic service environment and multi-party collaboration scenarios. SUMMARY

[0004] In view of the above existing problems, the present application is proposed.

[0005] Therefore, the present application provides a virtual space nursing home ecological method based on blockchain to solve the problem of difficult on-chain credible verification of service provider capabilities.

[0006] To solve the above technical problems, the present application provides the following technical solutions: In a first aspect, the present application provides a virtual space nursing home ecological method based on blockchain, comprising, The service provider submits a virtual nursing capability proof file through a virtual space supervision node, and pledges an initial token to generate a space auction permission; The elderly user initiates a nursing demand instruction in the virtual space nursing home through a space smart contract, the service provider holding the space auction permission receives the nursing demand instruction, submits an encrypted space bid package responding to the three-dimensional space equipment requirements, and generates a pending decision log; The system uses pending decision logs to trigger the signing of virtual space experience tokens for elderly users, generating a space authorization card; it then makes a judgment based on the risk identifier embedded in the space authorization card, and triggers family supervision token verification when the risk identifier is high-risk; the verified supervision token signature is associated with the space authorization card to generate a space execution token; The virtual space service task is activated by executing a token in the space, and a behavior trajectory certificate with blockchain evidence is generated by using space motion capture. The behavior trajectory certificate is verified by a smart contract to confirm that the health monitoring equipment occupancy parameters of the encrypted space quotation package meet the standards, triggering revenue sharing and settlement and updating the service provider's virtual space service credit rating.

[0007] As a preferred embodiment of the blockchain-based virtual space nursing home ecosystem method described in this invention, the generation of space auction permits by staking initial tokens is as follows: Perform hash calculations on the virtual nursing competence verification documents to generate unique document fingerprints; Upload the unique file fingerprint to the access verification smart contract of the underlying blockchain network; The access verification smart contract performs format verification on the unique file fingerprint to determine whether the unique file fingerprint meets the virtual care capability certification standard. After the virtual space regulatory node completes the verification of the virtual care capability certificate, it triggers the service provider to stake, and the service provider sends a fixed number of initial tokens to the access verification smart contract through a digital wallet. The access verification smart contract receives a fixed amount of initial tokens and locks them in the service provider's staking account; The access verification smart contract generates a space auction permit after confirming that the virtual care capability proof document has been verified and the initial tokens have been successfully staked.

[0008] As a preferred embodiment of the blockchain-based virtual space nursing home ecosystem method described in this invention, the submission of an encrypted space quotation package responding to the requirements of the three-dimensional space equipment, and the generation of a decision-pending log, are detailed below. The space smart contract receives encrypted space quotes and verifies the validity of the service provider's unique identifier; Collect all valid encrypted space quotes, use particle swarm optimization algorithm to compare the encrypted space quotes in real time, and generate a dynamic optimal matching list; Based on the unique identity of the service provider, the number of quoted tokens, the service quality commitment identifier, and the matching score in the dynamic optimal matching list, priority sorting and filtering operations are performed to generate a decision log.

[0009] As a preferred scheme of the blockchain-based virtual space nursing home ecological method, the pending decision log includes nursing demand instructions, a list of valid encrypted space offer packages after priority sorting, and timestamp information.

[0010] As a preferred scheme of the blockchain-based virtual space nursing home ecological method, the virtual space experience token of the elderly user is triggered by the pending decision log, and the space authorization card is generated, specifically as follows, The number of virtual space experience tokens required is determined according to the maximum token payment budget in the nursing demand instructions; A virtual space experience token use confirmation request is sent to the elderly user; The elderly user receives the virtual space experience token use confirmation request through the digital identity file, and completes the virtual space experience token signature in the digital identity file; The authorization data structure is constructed based on the nursing demand instructions, the list of encrypted space offer packages, and the virtual space experience token signature result; The authorization data structure is subjected to multi-dimensional data fingerprint extraction, combined with the current block timestamp of the blockchain network, the unique identity of the service provider, and the timestamp of the nursing demand instructions, to generate a unique identification of the space authorization card; The unique identification of the space authorization card is encapsulated with the authorization data structure to form the space authorization card.

[0011] As a preferred scheme of the blockchain-based virtual space nursing home ecological method, the digital identity file is a set of identity information of the service provider and the elderly user generated and stored in the blockchain ledger when they register in the virtual space nursing home ecological system.

[0012] As a preferred scheme of the blockchain-based virtual space nursing home ecological method, the virtual space service task is activated by the space execution token, and the behavior trajectory certificate is generated by using the space motion capture to store evidence in the blockchain, specifically as follows, The dynamic multi-dimensional authorization state verification is performed on the space execution token, and the virtual space service task is activated after confirming that the verification strategy is met; After the virtual space service task is started, the three-dimensional space motion data of the elderly user is collected through the wearable health monitoring device; The collected three-dimensional space motion data is encapsulated as a behavior trajectory data package; The behavior trajectory data package is subjected to SHA-256 hash algorithm to generate a unique identification of the behavior trajectory certificate; The unique identification of the behavior trajectory certificate is combined with the behavior trajectory data package to form the behavior trajectory certificate.

[0013] In a second aspect, the present application provides a virtual space nursing home ecological system based on a blockchain, comprising, A mortgage module is configured to enable a service party to submit a virtual nursing capability proof document through a virtual space supervision node, and to mortgage an initial token to generate a space auction license; A decision module is configured to enable an elderly user to initiate a nursing demand instruction in a virtual space nursing home through a space smart contract, and to enable a service party holding the space auction license to receive the nursing demand instruction, submit an encrypted space bid package responding to a three-dimensional space equipment requirement, and generate a pending decision log; A verification module is configured to trigger an elderly user virtual space experience token signature using the pending decision log, generate a space authorization card, determine based on a risk identifier embedded in the space authorization card, trigger a family supervision token verification when the risk identifier is a high risk, and associate the verified supervision token signature with the space authorization card to generate a space execution token; A trigger module is configured to activate a virtual space service task through the space execution token, generate a blockchain storage behavior trajectory certificate using a space motion capture, and trigger a settlement and update a virtual space service credit rating of the service party through the verification smart contract when the behavior trajectory certificate and the encrypted space bid package meet the health monitoring equipment occupancy parameter matching degree.

[0014] In a third aspect, the present application provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and wherein the computer program is executed by the processor to implement any step of the virtual space nursing home ecological method based on a blockchain according to the first aspect of the present application.

[0015] In a fourth aspect, the present application provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement any step of the virtual space nursing home ecological method based on a blockchain according to the first aspect of the present application.

[0016] The present application has the following advantages: the particle swarm optimization algorithm is used to compare and dynamically match and sort the multi-dimensional attributes of the encrypted space bid package, the intelligent optimization of the nursing service response scheme is realized, and the technical problems of low service matching efficiency and large subjective judgment interference in the virtual space nursing home are solved; the particle swarm optimization algorithm is based on key parameters such as service quality level, time window matching degree and bid token quantity, constructs a target function and iteratively optimizes the particle state, so as to quickly screen the optimal matching result from multiple candidate service schemes; this method does not need to rely on a centralized scheduling mechanism, and can realize efficient and transparent service matching in a decentralized environment, improves the response speed and quality of the elderly user to obtain services, and enhances the fair competition among service parties. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0018] Fig. 1 Flowchart for a blockchain-based virtual space nursing home ecosystem method.

[0019] Fig. 2 Schematic diagram of a blockchain-based virtual space nursing home ecosystem.

[0020] Fig. 3 Flowchart for generating a space bidding license for a mortgage initial token.

[0021] Fig. 4 Flowchart for generating a pending decision log for submitting an encrypted space bid package. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0023] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the scope of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0024] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0025] Reference Figs. 1-4 For one embodiment of the present application, the embodiment provides a blockchain-based virtual space nursing home ecosystem method, comprising the following steps: S1, the service party submits a virtual nursing capacity proof file through a virtual space supervision node, and generates a space bidding license for a mortgage initial token.

[0026] Further, the service party selects an authenticated virtual space supervision node as a submission portal in the virtual space nursing home ecosystem; The virtual space supervision node configures an upload interface of the virtual nursing capability proof file, and the service party submits the virtual nursing capability proof file through the upload interface; the virtual nursing capability proof file includes a nursing qualification certificate, service experience years, past service evaluation records and a list of health monitoring devices that can provide virtual nursing services of the service party; After receiving the virtual nursing capability proof file, the virtual space supervision node performs hash calculation on the virtual nursing capability proof file to generate a unique file fingerprint; the hash expression is: ; wherein, is the unique file fingerprint, and the length of the hash value is 256 bits, is the virtual nursing capability proof file, is a hash algorithm based on the SHA-2 standard, which processes input data D to generate a fixed-length 256-bit output; upload the unique file fingerprint to an admission verification smart contract in the underlying blockchain network; The admission verification smart contract performs format checking on the unique file fingerprint to determine whether the unique file fingerprint meets the virtual nursing capability authentication standard; the format checking specifically includes: first, the admission verification smart contract verifies whether the length of the unique file fingerprint is 256 bits to ensure that it meets the output standard of the SHA-256 hash algorithm; then, the admission verification smart contract checks the character composition of the unique file fingerprint to confirm that the characters of the unique file fingerprint are in hexadecimal format and have no illegal characters; the admission verification smart contract compares the unique file fingerprint with the expected hash structure in the virtual nursing capability authentication standard to ensure that the unique file fingerprint comes from the virtual nursing capability proof file and has not been tampered with; if the unique file fingerprint meets the 256-bit length, the hexadecimal format and the expected hash structure, the result is determined to be compliant; if the unique file fingerprint does not meet any of the 256-bit length, the hexadecimal format and the expected hash structure, the result is determined to be non-compliant; wherein the virtual nursing capability authentication standard is determined based on medical service requirements, which include compliance checks of the file format, nursing qualification certificate, service experience years, past service evaluation records and health monitoring device list of the virtual nursing capability proof file; If the result is compliant with the virtual nursing capability authentication standard, the admission verification smart contract is allowed to generate a unique identity of the service party; If the result is not compliant with the virtual nursing capability authentication standard, the admission verification smart contract is refused to generate a unique identity of the service party, and a verification failure prompt is returned to the virtual space supervision node.

[0027] The virtual space supervision node triggers the service party mortgage operation after completing the virtual nursing capability certificate verification, and the service party sends a fixed number of initial tokens to the access verification smart contract through the digital wallet; the fixed number of initial tokens is set by the access verification smart contract after the virtual nursing capability certificate verification is passed; The access verification smart contract receives the fixed number of initial tokens and locks the initial tokens in the service party mortgage account; The access verification smart contract generates a space auction license after confirming that the virtual nursing capability certificate verification is passed and the initial tokens are successfully mortgaged; the space auction license contains the unique identity of the service party, the initial token locking state and the license validity period; The space auction license is written into the blockchain ledger to realize data notarization; The virtual space supervision node returns the space auction license to the digital identity archive of the service party; The service party formally obtains the space auction license after completing the virtual nursing capability certificate submission and initial token mortgage, and has the qualification to respond to the nursing needs in the virtual space nursing home ecology.

[0028] S2, the old user initiates a nursing demand instruction in the virtual space nursing home through a space smart contract, the service party holding the space auction license receives the nursing demand instruction, submits an encrypted space bid package responding to the three-dimensional space device requirements, and generates a pending decision log.

[0029] Further, the old user submits nursing service demand information in the virtual space nursing home ecology through the digital identity archive; the nursing service demand information includes service type identification, service time range, geographical preference label, service quality level requirement, maximum token payment budget and risk level; the nursing service demand information is determined based on the personal nursing needs, preferences and payment capacity of the old user; The space smart contract receives the nursing service demand information and verifies the validity of the digital identity profile of the elderly user, and generates a nursing demand instruction after confirming the validity of the identity of the elderly user. The specific method for confirming the validity of the digital identity profile is as follows: first, the identity verification public key is extracted from the digital identity profile of the elderly user, which is generated when the elderly user registers in the virtual space nursing home ecology; then, it is verified whether the identity verification public key matches the identity registration record of the virtual space nursing home ecology, confirming that the digital identity profile of the elderly user exists in the blockchain ledger and has not been tampered with; then, the space smart contract verifies the validity of the digital signature in the digital identity profile of the elderly user, and confirms that the nursing service demand information is submitted by a legal elderly user by comparing whether the digital signature attached to the nursing service demand information is consistent with the signature generated by the identity verification public key; if the identity verification public key matches the identity registration record and the digital signature is consistent, the space smart contract confirms that the digital identity profile of the elderly user is valid, and generates a nursing demand instruction containing service type identification, service time range, geographical preference label, service quality level requirement, maximum token payment budget, risk level, unique request identifier and timestamp information; if the identity verification public key does not match or the digital signature is not consistent, the space smart contract refuses to generate a nursing demand instruction, and returns an identity verification failure prompt to the digital identity profile of the elderly user; The nursing demand instruction is broadcast to all service providers holding space auction permissions in the virtual space nursing home ecology; The service party holding the spatial auction license receives the care demand instruction, and determines whether the service party has response capability according to the service quality level requirement and the geographical preference tag in the care demand instruction. Specifically, first, the virtual care equipment list and historical service data are extracted from the service party digital identity file, and the virtual care equipment list includes health monitoring equipment type, health monitoring equipment compatibility identification, health monitoring equipment available time window and health monitoring equipment service capability description. Then, the service party compares the service quality level requirement in the care demand instruction with the health monitoring equipment service capability description in the virtual care equipment list, and confirms whether the health monitoring equipment service capability description meets the service quality level requirement (including care professional level, monitoring precision and service response speed), such as care professional level or monitoring precision standard. Next, the service party verifies whether the geographical preference tag in the care demand instruction matches the service coverage area in the service party digital identity file, and confirms that the service party can cover the area specified by the geographical preference tag. The service party also needs to check whether the health monitoring equipment available time window in the virtual care equipment list contains the service time range in the care demand instruction, to ensure that the service party can provide services at the specified time. If the health monitoring equipment service capability description meets the service quality level requirement, the geographical preference tag matches the service coverage area, and the health monitoring equipment available time window contains the service time range, the service party determines that it has response capability. If the health monitoring equipment service capability description does not meet the service quality level requirement, the geographical preference tag does not match the service coverage area, and the health monitoring equipment available time window does not contain the service time range, the service party determines that it does not have response capability.

[0030] The service provider with response capability calls the health monitoring device information in the service provider virtual nursing device list that meets the three-dimensional space device requirements; specifically: the service provider extracts the health monitoring device information from the virtual nursing device list in the service provider digital identity file; the service provider compares the three-dimensional space device requirements in the nursing demand instruction with the health monitoring device information, confirms whether the health monitoring device type supports three-dimensional motion capture, confirms whether the health monitoring device compatibility identifier is consistent with the health monitoring device standard of the virtual space nursing home ecology, confirms whether the health monitoring device available time window contains the service time range in the nursing demand instruction, and confirms whether the health monitoring device service capability description meets the service quality level requirement in the nursing demand instruction; if the health monitoring device type supports three-dimensional motion capture, the health monitoring device compatibility identifier is consistent with the health monitoring device standard of the virtual space nursing home ecology, the health monitoring device available time window contains the service time range, and the health monitoring device service capability description meets the service quality level requirement, the service provider determines that the health monitoring device information meets the three-dimensional space device requirements, and is used to generate space quotation content; if the health monitoring device type does not support three-dimensional motion capture, or the health monitoring device compatibility identifier is not consistent with the health monitoring device standard of the virtual space nursing home ecology, or the health monitoring device available time window does not contain the service time range in the nursing demand instruction, or the health monitoring device service capability description does not meet the service quality level requirement in the nursing demand instruction, the service provider determines that the health monitoring device information does not meet the three-dimensional space device requirements, and stops generating space quotation content; The service provider uses the service provider unique identity in the space auction license to digitally sign the space quotation content; specifically: the service provider extracts the private key corresponding to the service provider unique identity from the space auction license, which is an encryption key generated by the service provider when registering in the virtual space nursing home ecology and stored in the service provider digital identity file; the service provider uses the private key to perform ECDSA (Elliptic Curve Digital Signature) signature operation on the space quotation content to generate a digital signature; The ECDSA signature operation specifically includes: reading each byte of the space offer content byte sequence, performing bit operation and logical operation of the SHA-256 algorithm, and generating a space offer content hash value with a fixed length of 256 bits; the bit operation and logical operation of the SHA-256 algorithm specifically include: first, padding the space offer content byte sequence to an integer multiple of 512 bits in length, adding padding bits and length information to ensure compliance with the input requirements of the SHA-256 algorithm; then, dividing the padded space offer content byte sequence into 512-bit data blocks; for each 512-bit data block, the service party initializes eight initial hash values (H0 to H7) of the SHA-256 algorithm based on the fixed constants defined in the SHA-2 standard; the service party performs 64 rounds of iteration processing on each 512-bit data block, each round of iteration using the logical function of the SHA-256 algorithm, including bit and, bit or, bit XOR, bit not, right shift and right rotation operations, updating eight working variables (A to H) in combination with the constant table and data block content; after each round of iteration, the service party combines the eight working variables with the initial hash values to generate an intermediate hash value; after processing all 512-bit data blocks, the service party concatenates the final eight working variables to generate a 256-bit hash value, generating a space offer content hash value with a fixed length of 256 bits.

[0031] The service party then encrypts the space offer content hash value using the private key through the ECDSA signature algorithm, and the ECDSA signature process includes: selecting an elliptic curve standard parameter (such as the secp256k1 curve), generating a random number k based on the private key and the space offer content hash value, generating an r value through elliptic curve point multiplication operation, and generating an s value through the private key, the space offer content hash value and the r value, the r value and the s value together constitute a digital signature.

[0032] The space offer content after digital signature is packaged as an encrypted space offer package, which is sent to the space smart contract through the service party digital wallet; The space smart contract receives the encrypted space bid package and verifies the validity of the service party unique identity, and writes the encrypted space bid package into the to-be-processed queue after confirming the validity of the service party unique identity. The validity of the service party unique identity is verified as follows: first, the service party unique identity and the digital signature are extracted from the encrypted space bid package; then, the public key corresponding to the service party unique identity is queried from the blockchain account book, and the public key is generated by the service party when registering in the virtual space nursing home ecology and recorded in the service party digital identity archive; the space smart contract verifies whether the service party unique identity exists in the space auction permission record of the blockchain account book, confirms that the service party unique identity is valid and has not been revoked; then, the space smart contract performs an ECDSA verification operation on the digital signature using the public key, specifically: the space bid content after the digital signature is subjected to SHA-256 hash processing to generate a space bid content hash value; the digital signature is decrypted using the public key to obtain a decrypted hash value; the decrypted hash value is compared with the space bid content hash value to determine whether they are consistent; if the service party unique identity exists in the space auction permission record and has not been revoked, and the decrypted hash value is consistent with the space bid content hash value, the space smart contract determines that the service party unique identity is valid, and writes the encrypted space bid package into the to-be-processed queue; if the service party unique identity does not exist, has been revoked, or the hash values are inconsistent, the space smart contract determines that the service party unique identity is invalid, refuses to write into the to-be-processed queue, and returns a verification failure prompt to the service party digital wallet.

[0033] After the space smart contract collects all valid encrypted space offer packages, it uses a particle swarm optimization algorithm to compare the encrypted space offer packages in real time to generate a dynamic optimal matching list. Specifically, first, all valid encrypted space offer packages are extracted from the to-be-processed queue to form a set of valid encrypted space offer packages. The space smart contract initializes the particle swarm optimization algorithm, and each valid encrypted space offer package is regarded as a particle. The particle attributes include the number of service offer tokens, the service available time window hash value, and the service quality commitment identifier. The space smart contract assigns an initial position and speed to each particle. The initial position is based on the attribute values of the valid encrypted space offer package, and the initial speed is a random value. According to the service quality level requirement, the maximum token payment budget, and the risk level in the care demand instruction, the space smart contract defines a target function. The target function measures the closeness of the number of service offer tokens to the maximum token payment budget, the matching degree of the service available time window hash value to the service time range in the care demand instruction, and the degree of compliance of the service quality commitment identifier to the service quality level requirement. The space smart contract iteratively updates the position and speed of each particle. Specifically, through the iteration rule of the particle swarm optimization algorithm (set by the target function, which is defined based on the service quality level requirement, the maximum token payment budget, and the risk level in the care demand instruction), the speed and position of the particle are adjusted based on the current position, the historical optimal position, and the global optimal position. The valid encrypted space offer package is preferentially selected, which has a lower number of service offer tokens, a more matched service available time window hash value, and a more compliant service quality commitment identifier to the service quality level requirement. After a preset number of iterations, the space smart contract selects the particle set with the optimal target function value to generate a dynamic optimal matching list. The number of iterations is determined by the performance requirements of the virtual space nursing home ecosystem and the size of the set of valid encrypted space offer packages. For example, the value range is 50 to 200 times. According to the service party unique identity in the dynamic optimal matching list, the number of offer tokens, the service quality commitment identifier and the matching score, a priority sorting and screening operation is performed to generate a pending decision log; specifically, first, the valid encrypted space offer packages in the dynamic optimal matching list are sorted in descending order of matching score, and the valid encrypted space offer package with a higher matching score has a higher priority; then, the space smart contract compares the number of offer tokens of each valid encrypted space offer package with the maximum token payment budget in the care demand instruction, and screens out the records whose number of offer tokens does not exceed the maximum token payment budget; the space smart contract further verifies whether the service quality commitment identifier of each valid encrypted space offer package meets the service quality level requirement in the care demand instruction, to ensure that the service quality commitment identifier is consistent with the requirement; the valid encrypted space offer package that meets the maximum token payment budget and has a service quality commitment identifier consistent with the service quality level requirement is retained to form a priority sorted list; the space smart contract combines the priority sorted list with the care demand instruction and the timestamp information to generate a pending decision log; the pending decision log includes the care demand instruction, the list of valid encrypted space offer packages after priority sorting and the timestamp information; wherein the matching score is determined based on the closeness of the number of service offer tokens to the maximum token payment budget, the matching degree of the service available time window to the service time range, and the degree of conformity of the service quality commitment identifier to the service quality level requirement; The space smart contract writes the pending decision log into the blockchain ledger to realize data notarization.

[0034] S3, trigger the virtual space experience token signature of the elderly user by using the pending decision log, and generate a space authorization card; based on the risk identifier embedded in the space authorization card, it is determined whether the risk identifier is high risk, and the family supervision token verification is triggered; the supervision token signature that passes the verification is associated with the space authorization card to generate a space execution token.

[0035] Further, the space smart contract reads the latest generated pending decision log from the blockchain ledger; According to the maximum token payment budget in the care demand instruction, the number of virtual space experience tokens required is determined; The space smart contract sends a virtual space experience token use confirmation request to the elderly user; The elderly user receives a virtual space experience token use confirmation request through a digital identity file, and completes a virtual space experience token signature operation in the digital identity file. Specifically, the virtual space experience token use confirmation request is converted into a standardized byte sequence format, including a service type identifier and a required virtual space experience token quantity; the virtual space experience token use confirmation request byte sequence is processed using an SHA-256 hash algorithm to generate a 256-bit hash value; and the 256-bit hash value is encrypted using an ECDSA signature algorithm with an identity verification private key to generate a virtual space experience token signature result composed of an r value and an s value.

[0036] The virtual space experience token signature result of the elderly user is returned to a space smart contract, the validity of the virtual space experience token signature result is verified, and a space authorization plate generation process is started after confirming that the virtual space experience token signature is valid. The verification specifically includes extracting a digital signature and a byte sequence of the virtual space experience token use confirmation request from the virtual space experience token signature result, the byte sequence including a service type identifier and a required virtual space experience token quantity; the space smart contract queries an identity verification public key from the digital identity file of the elderly user, the identity verification public key being generated when the elderly user registers in a virtual space nursing home ecology and stored in the digital identity file; the space smart contract processes the virtual space experience token use confirmation request byte sequence using an SHA-256 hash algorithm to generate a 256-bit hash value; the space smart contract uses the identity verification public key to decrypt the digital signature through an ECDSA verification operation to obtain a decrypted 256-bit hash value, specifically, the identity verification public key and elliptic curve standard parameters are used to verify the validity of the r value and the s value to generate the 256-bit hash value; the space smart contract compares the decrypted 256-bit hash value with the 256-bit hash value of the virtual space experience token use confirmation request byte sequence to determine whether they are consistent, and confirms that the digital identity file of the elderly user exists in the blockchain ledger and has not been tampered with; if the decrypted 256-bit hash value is consistent with the 256-bit hash value and the digital identity file of the elderly user is valid, the space smart contract determines that the virtual space experience token signature result is valid; if the hash values are inconsistent or the digital identity file of the elderly user is invalid, the space smart contract determines that the virtual space experience token signature result is invalid.

[0037] Based on the nursing demand instruction, the encrypted space offer package list and the virtual space experience token signature result, an authorized data structure is constructed; specifically, first, the service type identifier, the unique request identifier and the timestamp information are extracted from the nursing demand instruction; then, the effective encrypted space offer package with the highest matching score and meeting the maximum token payment budget and service quality level requirement is selected from the priority-ordered effective encrypted space offer package list, and the service provider unique identity, the offer token quantity and the service quality commitment identifier are extracted; the space smart contract extracts the service type identifier and the required virtual space experience token quantity from the virtual space experience token signature result; the space smart contract integrates the service type identifier, the unique request identifier, the timestamp information, the service provider unique identity, the offer token quantity, the service quality commitment identifier and the required virtual space experience token quantity into a standardized data format as the authorized data structure; A multi-dimensional data fingerprint extraction is performed on the authorized data structure, combined with the current block timestamp of the blockchain network, the service provider unique identity and the nursing demand instruction timestamp, to generate a space authorization plate unique identifier; specifically, first, the authorized data structure is converted into a standardized byte sequence format, including the service type identifier, the service offer token quantity, the service quality commitment identifier, the unique request identifier and the timestamp information; then, the SHA-256 hash algorithm is used to process the authorized data structure byte sequence to generate a 256-bit hash value, specifically: the authorized data structure byte sequence is padded to a 512-bit integer multiple length, and padding bits and length information are added; the padded authorized data structure byte sequence is divided into 512-bit data blocks; for each 512-bit data block, eight initial hash values (H0 to H7) of the SHA-256 algorithm are initialized based on the fixed constants defined by the SHA-2 standard; each 512-bit data block is processed for 64 rounds of iteration, each round of iteration uses a logic function including bit and, bit or, bit xor, bit not, right shift and right rotation operations, and updates eight working variables (A to H) combined with the constant table and the data block content; after processing all 512-bit data blocks, the final eight working variables are spliced into a 256-bit hash value as the authorized data structure hash value; the space smart contract obtains the current block timestamp of the blockchain network from the blockchain ledger, extracts the service provider unique identity from the priority-ordered effective encrypted space offer package list, and extracts the nursing demand instruction timestamp from the nursing demand instruction; the space smart contract integrates the authorized data structure hash value, the current block timestamp of the blockchain network, the service provider unique identity and the nursing demand instruction timestamp into a single byte sequence, and performs the SHA-256 hash algorithm processing to generate a fixed-length 256-bit space authorization plate unique identifier.

[0038] The space authorization plate unique identifier and the authorized data structure are encapsulated into a space authorization plate, and the space authorization plate is written into the blockchain ledger to realize data notarization.

[0039] The space smart contract reads the space authorization card held by the elderly user from the blockchain account book, and analyzes the risk identification in the space authorization card. Specifically, first, the unique identifier of the space authorization card associated with the digital identity file of the elderly user is located from the blockchain account book; the space authorization card data corresponding to the unique identifier is retrieved by searching the blockchain account book; then the space authorization card data is decoded into a standardized data format to restore the service type identifier, service quotation token quantity, service quality commitment identifier, unique request identifier, timestamp information and risk identification; the space smart contract extracts the risk identification field from the decoded space authorization card data, and the risk identification field is a fixed format string; the space smart contract reads the string value of the risk identification field, and the string value is mapped to "high" indicating high risk or "low" indicating non-high risk based on the risk level in the care demand instruction, and the mapping rule is predefined by the virtual space nursing home ecological system and stored in the blockchain account book; the space smart contract analyzes the string value and confirms that the risk identification field value is "high" or "low", thereby determining the high risk or non-high risk state; When the risk identification is high risk, the space smart contract starts the family supervision token verification; including the following: Send a supervision token use confirmation request to the family account associated with the digital identity file of the elderly user; The family account receives the supervision token use confirmation request through the digital identity file and completes the supervision token signature in the digital identity file; The multi-signature weight verification and family behavior characteristic comparison of the supervision token signature result are carried out, and after confirming that the supervision token signature result meets the preset verification strategy, the space execution token generation stage is entered; Specifically, first, the digital signature and supervision token use confirmation request byte sequence are extracted from the supervision token signature result; the space smart contract obtains the associated family account list from the digital identity file of the elderly user, and the family account list includes the identity verification public key and the preset family supervision weight of each family account, and the family supervision weight is allocated by the virtual space nursing home ecological system according to the family relationship intimacy when the family account is registered and stored in the blockchain account book; The space smart contract performs an ECDSA verification operation on the digital signature using the identity verification public key of each family account, specifically: processing the regulatory token use confirmation request byte sequence to generate a 256-bit hash value, decrypting the digital signature using the identity verification public key to obtain a decrypted hash value, confirming that the decrypted hash value is consistent with the 256-bit hash value, and verifying the authenticity of the digital signature; subsequently extracting the historical behavior record of the family account from the blockchain ledger, which includes the login frequency, signature operation record, and regulatory token use history of the family account; comparing the signature timestamp of the regulatory token signature result with the behavior pattern in the historical behavior record of the family account to confirm whether the signature operation conforms to the regular behavior of the family account, such as whether the signature time is within the usual time period; the space smart contract confirms whether the total weight of the family accounts providing valid digital signatures meets the minimum weight threshold of the preset verification strategy (e.g., the value range is 10 to 30) based on the family regulatory weights in the family account list, and the verification strategy is defined by the virtual space nursing home ecosystem and stored in the blockchain ledger; if the digital signature is authentic, the signature operation conforms to the behavior pattern in the historical behavior record of the family account, and the total weight of the family accounts providing valid digital signatures meets the minimum weight threshold, the space smart contract determines that the regulatory token signature result meets the verification strategy and enters the space execution token generation phase; if the digital signature is not authentic, the signature operation does not conform to the behavior pattern, or the total weight does not meet the minimum weight threshold, the space smart contract determines that the regulatory token signature result does not meet the verification strategy and refuses to enter the space execution token generation phase and returns a verification failure prompt to the family account; wherein the minimum weight threshold is set based on the verification strategy to confirm whether the total weight of the family accounts providing valid digital signatures is sufficient to meet the regulatory token signature verification.

[0040] The space authorization card is bound and encapsulated with the regulatory token signature result to form a space execution token data structure; the space execution token data structure includes the unique identifier of the space authorization card, the regulatory token signature result, and timestamp information; The space execution token data structure is processed by the SHA-256 hash algorithm to generate a unique identifier of the space execution token; The unique identifier of the space execution token is combined with the space execution token data structure to form the final space execution token; The space execution token is written into the blockchain ledger to achieve data notarization, and the space execution token is returned to the digital identity file of the elderly user and stored in the virtual space permission directory of the elderly user.

[0041] S4, activate the virtual space service task through the space execution token, generate a blockchain notarized behavior trajectory certificate using space motion capture; verify the smart contract to confirm that the behavior trajectory certificate matches the health monitoring device occupancy parameter of the encrypted space bid package, trigger the settlement of accounts and update the service provider virtual space service credit rating.

[0042] Further, read the space execution token from the virtual space permission directory of the elderly user, perform dynamic multi-dimensional authorization state verification on the space execution token, and activate the virtual space service task after confirming that the verification policy is met; the specific is as follows: Extract the space execution token from the virtual space permission directory of the elderly user, verify whether the unique identifier of the space execution token exists in the blockchain ledger and has not been revoked, and confirm that the space execution token is valid; Extract the space authorization token unique identifier from the space execution token, and obtain the on-chain authorization state from the blockchain ledger based on the space authorization token unique identifier. The on-chain authorization state is "valid" or "invalid", indicating whether the space authorization token can be used for service tasks; Extract the highest matching score from the valid encrypted space bid package list sorted by priority from the space execution token associated with the valid encrypted space bid package, confirm whether the service available time window contains the service time range in the care demand instruction, and determine the service time window effectiveness; Extract the risk identifier from the space authorization token, which is "high" or "low", based on the risk level mapping in the care demand instruction; According to the virtual space nursing home ecological definition verification policy, the verification policy is stored in the blockchain ledger; the verification policy includes the on-chain authorization state being "valid", the service available time window containing the service time range, and the risk identifier being "high" or "low"; the space smart contract confirms in turn that the space execution token unique identifier is valid, the on-chain authorization state is "valid", the service available time window contains the service time range, and the risk identifier is "high" or "low"; If the space execution token unique identifier is valid, the on-chain authorization state is "valid", the service available time window contains the service time range, and the risk identifier meets "high" or "low", all conditions are met, then it is determined that the space execution token meets the verification policy, and the virtual space service task is activated; if the space execution token unique identifier is invalid, the on-chain authorization state is "invalid", the service available time window does not contain the service time range, and the risk identifier does not meet "high" or "low", any condition is not met, then it is determined that the space execution token does not meet the verification policy, and the virtual space service task is refused to be activated and a verification failure prompt is returned to the elderly user digital identity archive.

[0043] After the virtual space service task is started, the space action capture is called to monitor the behavior of the elderly user in real time; three-dimensional space action data of the elderly user is collected through wearable health monitoring equipment; the three-dimensional space action data includes action trajectory coordinates, action duration, action intensity and action timestamp; The three-dimensional space action data collected is packaged as behavior trajectory data packet and submitted to the blockchain ledger through the space smart contract; The SHA-256 hash algorithm is applied to the behavior trajectory data packet to generate a behavior trajectory certificate unique identifier; The behavior trajectory certificate unique identifier and the behavior trajectory data packet are combined into a behavior trajectory certificate, which is written into the on-chain data block to realize data notarization.

[0044] The smart contract verifies the behavior trajectory data packet and the behavior trajectory certificate unique identifier of the behavior trajectory certificate; The service provider's bound space key is called to decrypt the encrypted space offer packet; the encrypted space offer packet contains the digitally signed space offer content; specifically: first, extract the space key from the service provider's digital identity file, which is bound to the service provider's unique identifier; the smart contract extracts the encrypted space offer content byte sequence from the encrypted space offer packet; the space key is used to decrypt the space offer content byte sequence through the AES-256 symmetric encryption algorithm, specifically: the space key is used as the input key to initialize the decryption mode of the AES-256 algorithm; the encrypted space offer content byte sequence is divided into 128-bit data blocks; each 128-bit data block is decrypted by executing the inverse transformation of the AES-256 algorithm, including inverse byte substitution, inverse row shift, inverse column confusion and inverse key expansion, to generate the decrypted space offer content byte sequence; the decrypted space offer content byte sequence is restored to the service offer token quantity, service available time window hash value and service quality commitment identifier; the smart contract verifies the integrity of the decrypted space offer content byte sequence, confirms that the service offer token quantity, service available time window hash value and service quality commitment identifier are consistent with the digital signature, and generates the space offer content; The space offer content is extracted from the encrypted space offer packet, and the behavior trajectory data packet is parsed to obtain the actual value of the health monitoring device occupancy parameter; specifically: first, the service provider's bound space key is used to decrypt the encrypted space offer packet to restore the existing space offer content byte sequence, and the space offer content byte sequence is converted into the service offer token quantity, service available time window hash value and service quality commitment identifier; then the behavior trajectory data packet byte sequence is extracted from the behavior trajectory data packet, and the behavior trajectory data packet byte sequence is decoded into a standardized data format to restore the action trajectory coordinates, action duration, action intensity and action timestamp; the actual value of the health monitoring device occupancy parameter is extracted from the decoded behavior trajectory data packet, which includes the health monitoring device running time, health monitoring device usage frequency and health monitoring device monitoring accuracy; The service provider's promised health monitoring device occupancy parameter declaration value is extracted from the space offer content; comparing the device type compliance of the actual value of the health monitoring device occupancy parameter and the declared value of the health monitoring device occupancy parameter; the device type compliance is determined based on whether the health monitoring device type in the actual value of the health monitoring device occupancy parameter is the same as the health monitoring device type in the declared value of the health monitoring device occupancy parameter; calculating the difference rate of the actual value of the health monitoring device occupancy parameter and the declared value of the health monitoring device occupancy parameter, expressed as: ; wherein, is the difference rate of the health monitoring device occupancy parameter, indicating the relative difference between the actual value and the declared value of the health monitoring device occupancy parameter, with a unit of percentage, is the actual value of the health monitoring device occupancy parameter, including the health monitoring device operation time (in hours), the health monitoring device usage frequency (number of collection times per minute), and the health monitoring device monitoring accuracy (in millimeters) extracted from the behavior trajectory data packet, is the declared value of the health monitoring device occupancy parameter, including the health monitoring device operation time (in hours), the health monitoring device usage frequency (number of collection times per minute), and the health monitoring device monitoring accuracy (in millimeters) extracted from the space offering content; when the health monitoring device type compliance and the difference rate do not exceed the preset matching degree threshold, verifying the smart contract to generate a matching degree compliance event; the matching degree threshold is set by the virtual space nursing home ecosystem according to the health monitoring device performance requirements and the service quality level requirements, for example, the value range is 5% to 20%; the matching degree compliance event includes the service party unique identity, the behavior trajectory certificate unique identity, the actual value of the health monitoring device occupancy parameter, the declared value of the health monitoring device occupancy parameter, and the health monitoring device type compliance confirmation result; triggering the account settlement operation by using the matching degree compliance event, and updating the virtual space service credit rating in the service party digital identity file after the account settlement operation is completed; It should be noted that the matching degree compliance refers to that the device type compliance of the actual value of the health monitoring device occupancy parameter and the declared value of the health monitoring device occupancy parameter is passed and the difference rate does not exceed the matching degree threshold, confirming that the health monitoring device operation time, the usage frequency, and the monitoring accuracy provided by the service party are consistent with the values (including the health monitoring device operation time, the health monitoring device usage frequency, and the health monitoring device monitoring accuracy) promised by the service party in the space offering content.

[0045] The embodiment also provides a virtual space nursing home ecosystem based on a blockchain, comprising: a mortgage module for the service party to submit a virtual nursing capability proof file through a virtual space supervision node to generate a space auction permission by mortgaging initial tokens; A decision module is configured to initiate a care demand instruction by an old user in a virtual space nursing home through a space smart contract, receive the care demand instruction by a service party holding a space bidding permission, submit an encrypted space bid package responding to a three-dimensional space equipment requirement, and generate a pending decision log. A verification module is configured to trigger an old user virtual space experience token signature by using the pending decision log, generate a space authorization card, determine based on a risk identifier embedded in the space authorization card, trigger a family supervision token verification when the risk identifier is a high risk, and associate the verified supervision token signature with the space authorization card to generate a space execution token. A trigger module is configured to activate a virtual space service task by using the space execution token, generate a behavior trajectory certificate stored in a blockchain by using a space motion capture, and trigger a settlement and update a virtual space service credit rating of a service party by verifying a smart contract to confirm that the behavior trajectory certificate matches the health monitoring equipment occupation parameter of the encrypted space bid package.

[0046] The embodiment also provides a computer device suitable for the case of the virtual space nursing home ecological method based on a blockchain, including a memory and a processor, the memory is configured to store computer executable instructions, and the processor is configured to execute the computer executable instructions to implement the virtual space nursing home ecological method based on a blockchain as proposed in the above embodiment.

[0047] The computer device can be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. 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 operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is configured to perform wired or wireless communication with an external terminal. The wireless communication can be achieved through WIFI, a carrier network, NFC (near field communication) or other technologies. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device. In addition, the input device can be an external keyboard, touchpad or mouse, etc.

[0048] The embodiment also provides a storage medium on which a computer program is stored, the program being executed by a processor to implement the method for realizing a virtual space nursing home ecology based on a blockchain as proposed in the above embodiment; the storage medium can be realized by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disk.

[0049] To sum up, the method for realizing a virtual space nursing home ecology based on a blockchain realizes intelligent optimization of a nursing service response scheme by performing multi-dimensional attribute comparison and dynamic matching sorting on an encrypted space offer package through a particle swarm optimization algorithm, solves the technical problems of low service matching efficiency and large subjective judgment interference in a virtual space nursing home, the particle swarm optimization algorithm constructs a target function and iteratively optimizes particle states based on key parameters such as a service quality level, a time window matching degree, and a number of offer tokens, and thus quickly filters out an optimal matching result from multiple candidate service schemes, the method does not need to rely on a centralized scheduling mechanism, and can realize efficient and transparent service matching in a decentralized environment, improves the response speed and quality of service acquisition of an elderly user, and enhances the fair competition between service providers.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A blockchain-based approach to create a virtual space-based nursing home ecosystem, characterized by: include, Service providers submit proof of their virtual nursing capabilities through the virtual space monitoring node and pledge initial tokens to generate space auction licenses; Elderly users initiate care request instructions through space smart contracts within the virtual space nursing home. Service providers holding space bidding licenses receive care request instructions, submit encrypted space quotation packages in response to the requirements of three-dimensional space equipment, and generate decision-making logs. The system uses pending decision logs to trigger the signing of virtual space experience tokens for elderly users, generating a space authorization card; it then makes a judgment based on the risk identifier embedded in the space authorization card, and triggers family supervision token verification when the risk identifier is high-risk; the verified supervision token signature is associated with the space authorization card to generate a space execution token; The virtual space service task is activated by executing a token in the space, and a behavior trajectory certificate with blockchain evidence is generated by using space motion capture. The behavior trajectory certificate is verified by a smart contract to confirm that the health monitoring equipment occupancy parameters of the encrypted space quotation package meet the standards, triggering revenue sharing and settlement and updating the service provider's virtual space service credit rating.

2. The blockchain-based virtual space nursing home ecosystem method as described in claim 1, characterized in that: The process of generating space auction permits by staking initial tokens is as follows: Perform hash calculations on the virtual nursing competence verification documents to generate unique document fingerprints; Upload the unique file fingerprint to the access verification smart contract of the underlying blockchain network; The access verification smart contract performs format verification on the unique file fingerprint to determine whether the unique file fingerprint meets the virtual care capability certification standard. After the virtual space regulatory node completes the verification of the virtual care capability certificate, it triggers the service provider to stake, and the service provider sends a fixed number of initial tokens to the access verification smart contract through a digital wallet. The access verification smart contract receives a fixed amount of initial tokens and locks them in the service provider's staking account; The access verification smart contract generates a space auction permit after confirming that the virtual care capability proof document has been verified and the initial tokens have been successfully staked.

3. The blockchain-based virtual space nursing home ecosystem method as described in claim 1, characterized in that: The submission of an encrypted space quotation package in response to the requirements of the 3D space device generates a decision-pending log, as detailed below. The space smart contract receives encrypted space quotes and verifies the validity of the service provider's unique identifier; Collect all valid encrypted space quotes, use particle swarm optimization algorithm to compare the encrypted space quotes in real time, and generate a dynamic optimal matching list; Based on the unique identity of the service provider, the number of quoted tokens, the service quality commitment identifier, and the matching score in the dynamic optimal matching list, priority sorting and filtering operations are performed to generate a decision log.

4. The blockchain-based virtual space nursing home ecosystem method as described in claim 3, characterized in that: The decision log includes nursing need instructions, a list of encrypted space quotation packages that are sorted by priority, and timestamp information.

5. The blockchain-based virtual space nursing home ecosystem method as described in claim 1, characterized in that: The process of using the pending decision log to trigger the signing of virtual space experience tokens for elderly users and generate space authorization tokens is as follows: The required number of virtual space experience tokens is determined based on the maximum token payment budget in the care needs instruction. Send confirmation requests for the use of virtual space experience tokens to elderly users; Elderly users receive a confirmation request for the use of virtual space experience tokens through their digital identity profiles and complete the signing of the virtual space experience tokens in their digital identity profiles. An authorization data structure is constructed based on nursing demand instructions, a list of encrypted space offer packages, and the signature results of virtual space experience tokens. Multi-dimensional data fingerprint extraction is performed on the authorized data structure, and combined with the current block timestamp of the blockchain network, the unique identity of the service provider, and the timestamp of the care request instruction, a unique identifier for the spatial authorization card is generated; The unique identifier and authorization data structure of the space authorization token are encapsulated into a space authorization token.

6. The blockchain-based virtual space nursing home ecosystem method as described in claim 5, characterized in that: The digital identity profile is a collection of identity information generated and stored in a blockchain ledger when service providers and elderly users register in the virtual nursing home ecosystem.

7. The blockchain-based virtual space nursing home ecosystem method as described in claim 1, characterized in that: The process of activating virtual space service tasks via spatial execution tokens and generating blockchain-based evidence of behavioral trajectories using spatial motion capture is detailed below. Perform dynamic multi-dimensional authorization status verification on the space execution token, and activate the virtual space service task after confirming that the verification policy is met; Once the virtual space service task is initiated, three-dimensional spatial motion data of elderly users will be collected through wearable health monitoring devices; The collected 3D spatial motion data is encapsulated into behavior trajectory data packages; The SHA-256 hash algorithm is used to generate a unique identifier for the behavior trajectory credential from the behavior trajectory data packet; The unique identifier of the behavior trajectory credential is combined with the behavior trajectory data packet to form the behavior trajectory credential.

8. A blockchain-based virtual space nursing home ecosystem, based on the blockchain-based virtual space nursing home ecosystem method according to any one of claims 1 to 7, characterized in that: include, The collateral module is used by service providers to submit virtual care capability proof documents through the virtual space supervision node and collateralize initial tokens to generate space auction licenses. The decision-making module is used by elderly users to initiate care request instructions through space smart contracts in the virtual space nursing home. Service providers holding space bidding licenses receive care request instructions, submit encrypted space quotation packages in response to the requirements of three-dimensional space equipment, and generate decision logs. The verification module is used to trigger the signing of virtual space experience tokens for elderly users using the decision-making log to generate a space authorization card; it makes a judgment based on the risk identifier embedded in the space authorization card, and triggers the verification of family supervision tokens when the risk identifier is high risk; it associates the verified supervision token signature with the space authorization card to generate a space execution token; The trigger module is used to activate virtual space service tasks through space execution tokens, generate blockchain-based evidence of behavioral trajectory using space motion capture, and verify the matching degree between the behavioral trajectory evidence and the health monitoring equipment occupancy parameters of the encrypted space quotation package through smart contract verification, triggering revenue sharing and settlement and updating the service provider's virtual space service credit rating.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, it implements the steps of the blockchain-based virtual space nursing home ecosystem method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the steps of the blockchain-based virtual space nursing home ecosystem method according to any one of claims 1 to 7.

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