Blockchain-based virtual space nursing home ecosystem and method

Abstract

The application discloses a kind of virtual space nursing home ecosystem and method based on blockchain, it is related to blockchain technology field, including, mortgage initial token generation space auction license;The service party holding space auction license receives nursing demand instruction, submits the encrypted space offer package responding to three-dimensional space equipment requirement, generates pending decision log;Virtual space experience token signature of old user is triggered using pending decision log, and space authorization card is generated;Determination is carried out based on the risk identification embedded in space authorization card, triggers family supervision token verification;The supervision token signature that is verified passes is associated with space authorization card to generate space execution token;Virtual space service task is activated by space execution token, and behavior trajectory voucher of blockchain storage is generated using space action capture.The application carries out multidimensional attribute comparison and dynamic matching sorting to encrypted space offer package by particle swarm optimization algorithm, and the intelligent optimization of nursing service response scheme is realized.

Description

Technical Field

[0001] This invention relates to the field of blockchain technology, and in particular to a blockchain-based virtual space nursing home ecosystem and method. Background Technology

[0002] Against the backdrop of the deep integration of virtual space and blockchain technology, elderly care service models are gradually evolving towards decentralization and intelligence. In recent years, with the development of virtual reality, the Internet of Things, and distributed ledger technology, blockchain-based virtual space elderly care service systems have gradually become a research hotspot. Virtual space elderly care service systems typically utilize smart contracts to automatically match and execute service requests, and leverage the immutability of blockchain to ensure the reliable recording of service data. Some existing technologies have attempted to combine service credit rating, token incentive mechanisms, and virtual space task scheduling to build a preliminary decentralized care service ecosystem.

[0003] While existing technologies have made some progress in service scheduling and data storage, there is still room for improvement in service access mechanisms and risk control during the execution process. In particular, the lack of an effective mechanism for verifying the dynamic capabilities of service providers and for tracing and monitoring service execution behavior makes it difficult to balance the accuracy of service matching with the level of user safety. Existing virtual space elderly care services typically use static qualification certification and centralized log recording to manage service processes. When facing dynamic service environments and multi-party collaboration scenarios, this approach suffers from problems such as long review cycles, low data credibility, and difficulty in obtaining evidence in case of disputes. Summary of the Invention

[0004] In view of the aforementioned existing problems, the present invention is proposed.

[0005] Therefore, this invention provides a blockchain-based virtual space nursing home ecosystem method to solve the problem of on-chain trusted verification of service provider capabilities.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] In a first aspect, the present invention provides a blockchain-based virtual space nursing home ecosystem method, which includes,

[0008] Service providers submit proof of their virtual nursing capabilities through the virtual space monitoring node and pledge initial tokens to generate space auction licenses;

[0009] 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.

[0010] 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;

[0011] 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.

[0012] 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 specifically as follows:

[0013] Perform hash calculations on the virtual nursing competence verification documents to generate unique document fingerprints;

[0014] Upload the unique file fingerprint to the access verification smart contract of the underlying blockchain network;

[0015] 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.

[0016] 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.

[0017] The access verification smart contract receives a fixed amount of initial tokens and locks them in the service provider's staking account;

[0018] 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.

[0019] 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.

[0020] The space smart contract receives encrypted space quotes and verifies the validity of the service provider's unique identifier;

[0021] 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;

[0022] 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.

[0023] As a preferred embodiment of the blockchain-based virtual space nursing home ecosystem method described in this invention, the decision log includes nursing demand instructions, a list of encrypted space quotation packages with priority sorting, and timestamp information.

[0024] As a preferred embodiment of the blockchain-based virtual space nursing home ecosystem method described in this invention, the step of using the pending decision log to trigger the signing of virtual space experience tokens by elderly users to generate space authorization tokens is as follows:

[0025] The required number of virtual space experience tokens is determined based on the maximum token payment budget in the care needs instruction.

[0026] Send confirmation requests for the use of virtual space experience tokens to elderly users;

[0027] 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.

[0028] 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.

[0029] 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;

[0030] The unique identifier and authorization data structure of the space authorization token are encapsulated into a space authorization token.

[0031] As a preferred embodiment of the blockchain-based virtual space nursing home ecosystem method described in this invention, the digital identity profile is a set of identity information generated and stored in the blockchain ledger when the service provider and elderly users register in the virtual space nursing home ecosystem.

[0032] As a preferred embodiment of the blockchain-based virtual space nursing home ecosystem method described in this invention, the step of activating virtual space service tasks through a space execution token and generating blockchain-verified behavioral trajectory credentials using space motion capture is detailed below.

[0033] 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;

[0034] Once the virtual space service task is initiated, three-dimensional spatial motion data of elderly users will be collected through wearable health monitoring devices;

[0035] The collected 3D spatial motion data is encapsulated into behavior trajectory data packages;

[0036] The SHA-256 hash algorithm is used to generate a unique identifier for the behavior trajectory credential from the behavior trajectory data packet;

[0037] The unique identifier of the behavior trajectory credential is combined with the behavior trajectory data packet to form the behavior trajectory credential.

[0038] Secondly, this invention provides a blockchain-based virtual space nursing home ecosystem, including:

[0039] 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.

[0040] 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.

[0041] 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;

[0042] 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.

[0043] Thirdly, the present invention provides a computer device including a memory and a processor, wherein the memory stores a computer program, wherein: when the computer program is executed by the processor, it implements any step of the blockchain-based virtual space nursing home ecosystem method as described in the first aspect of the present invention.

[0044] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, it implements any step of the blockchain-based virtual space nursing home ecosystem method as described in the first aspect of the present invention.

[0045] The beneficial effects of this invention are as follows: By using the particle swarm optimization algorithm to compare and dynamically match the multi-dimensional attributes of the encrypted space quotation package, intelligent optimization of nursing service response schemes is achieved, solving the technical problems of low service matching efficiency and large interference from subjective judgment in virtual space nursing homes; the particle swarm optimization algorithm constructs an objective function and iteratively optimizes the particle state based on key parameters such as service quality level, time window matching degree, and quotation token quantity, thereby quickly selecting the optimal matching result from multiple candidate service schemes; this method does not rely on a centralized scheduling mechanism and can achieve high-efficiency and high-transparency service matching in a decentralized environment, improving the response speed and quality of services obtained by elderly users, while enhancing fair competition among service providers. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a flowchart of a blockchain-based virtual space nursing home ecosystem approach.

[0048] Figure 2 This is a schematic diagram of a blockchain-based virtual space nursing home ecosystem.

[0049] Figure 3 A flowchart for generating space auction permits for staking initial tokens.

[0050] Figure 4 A flowchart for generating a decision log for submitting a crypto space offer package. Detailed Implementation

[0051] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0052] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0053] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0054] Reference Figures 1-4 This is one embodiment of the present invention, which provides a blockchain-based virtual space nursing home ecosystem method, including the following steps:

[0055] S1. The service provider submits virtual nursing capability proof documents through the virtual space supervision node and uses the initial tokens as collateral to generate a space auction license.

[0056] Furthermore, the service provider selects an certified virtual space regulatory node within the virtual space nursing home ecosystem as the submission entry point;

[0057] The virtual space supervision node is configured with an upload interface for virtual nursing capability certification documents. Service providers submit virtual nursing capability certification documents through the upload interface. The virtual nursing capability certification documents include the service provider's nursing qualification certificate, years of service experience, past service evaluation records, and a list of health monitoring devices that can provide virtual nursing services.

[0058] After receiving the virtual nursing capability certificate, the virtual space monitoring node performs a hash calculation on the certificate to generate a unique file fingerprint; the hash expression is:

[0059] ;

[0060] in, This is a unique file fingerprint, a 256-bit hash value. For virtual nursing competence documentation, This is a hash algorithm based on the SHA-2 standard, which processes input data D and generates a fixed-length 256-bit output.

[0061] Upload the unique file fingerprint to the access verification smart contract of the underlying blockchain network;

[0062] The access verification smart contract performs format validation on the unique file fingerprint to determine whether it conforms to the virtual nursing competence certification standard. The format validation specifically involves: first, verifying that the unique file fingerprint is 256 bits long to ensure it conforms to the output standard of the SHA-256 hash algorithm; second, checking the character composition of the unique file fingerprint to confirm that the characters are in hexadecimal format and contain no illegal characters; and third, comparing the unique file fingerprint with the expected hash structure in the virtual nursing competence certification standard to ensure that the unique file fingerprint originates from the virtual nursing competence certificate and has not been tampered with. If the unique file fingerprint meets the requirements of 256-bit length, hexadecimal format, and expected hash structure, the result is considered compliant; if the unique file fingerprint does not meet any of these conditions, the result is considered non-compliant. The virtual nursing competence certification standard is based on medical service requirements, which include compliance checks on the file format of the virtual nursing competence certificate, nursing qualification certificates, years of service experience, past service evaluation records, and the list of health monitoring equipment.

[0063] If the judgment result is that it meets the virtual nursing capability certification standard, then the access verification smart contract is allowed to generate a unique identity identifier for the service provider.

[0064] If the result indicates that the service provider does not meet the virtual nursing capability certification standards, the access verification smart contract will be rejected to generate a unique identity identifier for the service provider, and a verification failure message will be returned to the virtual space supervision node.

[0065] After the virtual space regulatory node completes the verification of the virtual care capability certificate, it triggers the service provider's staking operation. The service provider sends a fixed number of initial tokens to the access verification smart contract through a digital wallet. The fixed number of initial tokens is set by the access verification smart contract after the virtual care capability certificate is verified.

[0066] The access verification smart contract receives a fixed amount of initial tokens and locks them in the service provider's staking account;

[0067] 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. The space auction permit includes the service provider's unique identity, the initial token lock status, and the permit's validity period.

[0068] Space auction permits are written into a blockchain ledger to achieve data preservation;

[0069] The virtual space monitoring node will return the space auction permit to the service provider's digital identity profile;

[0070] After submitting their virtual care capability documentation and initial token staking, the service provider officially obtains permission to bid for space and becomes qualified to respond to care needs within the virtual nursing home ecosystem.

[0071] S2. 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 a decision-making log.

[0072] Furthermore, elderly users submit their nursing service needs through digital identity profiles within the virtual nursing home ecosystem. These needs include service type identifiers, service time ranges, geographic preference tags, service quality level requirements, maximum token payment budget, and risk level. The nursing service needs are determined based on the elderly user's individual nursing needs, preferences, and ability to pay.

[0073] The space smart contract receives nursing service request information and verifies the validity of the elderly user's digital identity profile. Upon confirming the elderly user's identity, it generates a nursing request instruction. The verification of the digital identity profile's validity involves: first, extracting the identity verification public key from the elderly user's digital identity profile, which is generated when the elderly user registers in the virtual space nursing home ecosystem; then verifying whether the identity verification public key matches the identity registration record in the virtual space nursing home ecosystem, confirming that the elderly user's digital identity profile exists in the blockchain ledger and has not been tampered with; next, the space smart contract verifies the validity of the digital signature in the elderly user's digital identity profile by comparing the digital signature attached to the nursing service request information with the signature generated by the identity verification public key, ensuring that the nursing service request information is submitted by a legitimate elderly user; if the identity verification public key matches the identity registration record and the digital signature matches, the space smart contract confirms the validity of the elderly user's digital identity profile and generates a nursing request instruction containing service type identifier, service time range, geographical preference tags, service quality level requirements, 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 does not match, the space smart contract refuses to generate the nursing request instruction and returns an identity verification failure message to the elderly user's digital identity profile.

[0074] Broadcast nursing care request instructions to all service providers holding space bidding licenses in the virtual space nursing home ecosystem;

[0075] Service providers holding space bidding licenses receive nursing care request instructions. The service provider's responsiveness is assessed based on the service quality level requirements and geographic preference tags specified in the instruction. Specifically, this involves: first, extracting a virtual nursing equipment list and historical service data from the service provider's digital identity profile. The virtual nursing equipment list includes the type of health monitoring equipment, compatibility indicators, available time windows, and a description of its service capabilities. The service provider then compares the service quality level requirements in the nursing care request instruction with the descriptions of the health monitoring equipment's capabilities in the virtual equipment list to confirm whether the descriptions meet the service quality level requirements (including nursing professional level, monitoring accuracy, and service response speed), such as nursing professional level or monitoring accuracy standards. Next, the service provider verifies the nursing care equipment's service capabilities. The service provider checks whether the geographic preference tag in the nursing request instruction matches the service coverage area in the service provider's digital identity profile, confirming that the service provider can cover the area specified by the geographic preference tag. The service provider also needs to check whether the available time window for health monitoring devices in the virtual nursing device list includes the service time range in the nursing request instruction, ensuring that the service provider can provide services at the specified time. If the service capability description of the health monitoring device meets the service quality level requirements, the geographic preference tag matches the service coverage area, and the available time window of the health monitoring device includes the service time range, the service provider is deemed to have responsiveness. If the service capability description of the health monitoring device does not meet the service quality level requirements, the geographic preference tag does not match the service coverage area, and the available time window of the health monitoring device does not include the service time range, the service provider is deemed not to have responsiveness.

[0076] The responsive service provider retrieves health monitoring equipment information that meets the 3D spatial requirements from its virtual nursing equipment list. Specifically, the service provider extracts health monitoring equipment information from its digital identity profile's virtual nursing equipment list. The service provider compares the 3D spatial equipment requirements in the nursing request instruction with the health monitoring equipment information to confirm whether the health monitoring equipment type supports 3D motion capture, whether the health monitoring equipment compatibility identifier is consistent with the health monitoring equipment standards of the virtual nursing home ecosystem, whether the available time window of the health monitoring equipment includes the service time range in the nursing request instruction, and whether the service capability description of the health monitoring equipment meets the service quality level requirements in the nursing request instruction. If the health monitoring equipment type supports 3D motion capture and health monitoring... If the equipment compatibility identifier is consistent with the health monitoring equipment standards of the virtual space nursing home ecosystem, the available time window of the health monitoring equipment includes the service time range, and the description of the health monitoring equipment's service capabilities meets the service quality level requirements, the service provider determines that the health monitoring equipment information meets the requirements of 3D space equipment and uses it to generate space quotation content; if the health monitoring equipment type does not support 3D motion capture, or the health monitoring equipment compatibility identifier is inconsistent with the health monitoring equipment standards of the virtual space nursing home ecosystem, or the available time window of the health monitoring equipment does not include the service time range in the care request instruction, or the description of the health monitoring equipment's service capabilities does not meet the service quality level requirements in the care request instruction, the service provider determines that the health monitoring equipment information does not meet the requirements of 3D space equipment and stops generating space quotation content;

[0077] The service provider uses its unique identifier in the space auction license to digitally sign the space bid content; specifically: the service provider extracts the private key corresponding to its unique identifier from the space auction license. The private key is an encryption key generated and stored in the service provider's digital identity file when the service provider registers in the virtual space nursing home ecosystem; the service provider uses the private key to perform an ECDSA (Elliptic Curve Digital Signature) signing operation on the space bid content to generate a digital signature;

[0078] The ECDSA signature operation is as follows: Each byte of the spatial quotation content byte sequence is read, and bitwise and logical operations of the SHA-256 algorithm are performed to generate a fixed-length 256-bit hash value for the spatial quotation content. The bitwise and logical operations of the SHA-256 algorithm are as follows: First, the spatial quotation content byte sequence is padded to a length that is a multiple of 512 bits, adding padding bits and length information to ensure compliance with the SHA-256 algorithm input requirements. Then, the padded spatial quotation content byte sequence is divided into 512-bit data blocks. For each 512-bit data block, the service provider initializes eight initial hash values ​​for the SHA-256 algorithm. The hash values ​​(H0 to H7) are fixed constants defined by the SHA-2 standard. The service provider performs 64 rounds of iterative processing on each 512-bit data block. Each round of iteration uses the logical functions of the SHA-256 algorithm, including bitwise AND, bitwise OR, bitwise XOR, bitwise NOT, right shift, and right rotation operations, and updates eight working variables (A to H) in combination with the constant table and the data block content. After each round of iteration, the service provider merges the eight working variables with the initial hash value to generate an intermediate hash value. After processing all 512-bit data blocks, the service provider concatenates the final eight working variables into a 256-bit hash value to generate a fixed-length 256-bit space quotation content hash value.

[0079] The service provider then uses the private key to encrypt the hash value of the spatial quotation content using the ECDSA signature algorithm. The ECDSA signature process includes: selecting elliptic curve standard parameters (e.g., the secp256k1 curve), generating a random number k based on the private key and the hash value of the spatial quotation content, generating a value r through elliptic curve dot product operation, and then generating a value s using the private key, the hash value of the spatial quotation content, and the value r. The value r and the value s together form a digital signature.

[0080] The digitally signed space quote is packaged into an encrypted space quote package, which is then sent to the space smart contract via the service provider's digital wallet.

[0081] The space smart contract receives encrypted space bid packages and verifies the validity of the service provider's unique identifier. After confirming the validity of the service provider's unique identifier, it writes the encrypted space bid package into a pending queue. Verifying the validity of the service provider's unique identifier involves: first, extracting the service provider's unique identifier and digital signature from the encrypted space bid package; then, querying the blockchain ledger for the public key corresponding to the service provider's unique identifier, which is generated and recorded in the service provider's digital identity profile during registration within the virtual space nursing home ecosystem; the space smart contract verifies whether the service provider's unique identifier exists in the space auction license record on the blockchain ledger, confirming that the service provider's unique identifier is valid and has not been revoked; finally, the space smart contract uses the public key to execute an ECD on the digital signature. The SA verification operation is as follows: The digitally signed space bid content is hashed using SHA-256 to generate a hash value for the space bid content; the digital signature is decrypted using the public key to obtain the decrypted hash value; the decrypted hash value is compared with the hash value of the space bid content; if the service provider's unique identity exists in the space auction license record and has not been revoked, and the decrypted hash value matches the hash value of the space bid content, the space smart contract determines that the service provider's unique identity is valid and writes the encrypted space bid package into the pending queue; if the service provider's unique identity does not exist, has been revoked, or the hash value is inconsistent, the space smart contract determines that the service provider's unique identity is invalid, refuses to write it into the pending queue, and returns a verification failure message to the service provider's digital wallet.

[0082] After collecting all valid encrypted space offer packages, the space smart contract uses a particle swarm optimization algorithm to compare the encrypted space offer packages in real time, generating a dynamic optimal matching list. Specifically: First, all valid encrypted space offer packages are extracted from the waiting queue to form a set of valid encrypted space offer packages; the space smart contract initializes the particle swarm optimization algorithm, treating each valid encrypted space offer package as a particle, with particle attributes including the number of service offer tokens, the hash value of the service availability time window, and the service quality commitment identifier; the space smart contract assigns an initial position and velocity to each particle, with the initial position based on the attribute values ​​of the valid encrypted space offer package and the initial velocity being a random value; the space smart contract defines an objective function based on the service quality level requirements, maximum token payment budget, and risk level in the care request instruction, the objective function measuring the closeness of the service offer token quantity to the maximum token payment budget, and the closeness of the service availability time window hash value to the service time specified in the care request instruction. The matching degree of the scope and the degree of conformity between the service quality commitment identifier and the service quality level requirements; the spatial smart contract iteratively updates the position and velocity of each particle, specifically: through the iterative rules of the particle swarm optimization algorithm (set by the objective function, which is based on the service quality level requirements, maximum token payment budget and risk level definition in the care demand instruction), based on the current position, historical best position and global best position, the velocity and position of the particles are adjusted, prioritizing the selection of effective encrypted space quotation packages with lower service quotation tokens, service availability time window hash values ​​that better match the service time range, and service quality commitment identifiers that better meet the service quality level requirements; after a preset number of iterations, the spatial smart contract selects the particle set with the optimal objective function value and generates 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 effective encrypted space quotation package set, for example, the value range is 50 to 200 times;

[0083] Based on the unique identifier 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. Specifically: First, the valid encrypted space quote packages in the dynamic optimal matching list are sorted from highest to lowest according to their matching scores, with higher-scoring valid encrypted space quote packages having higher priority. Next, the space smart contract compares the number of quoted tokens for each valid encrypted space quote package with the maximum token payment budget in the care request instruction, filtering out records where the number of quoted 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 quote package meets the care request instruction. The service quality level requirements are defined to ensure that the service quality commitment identifier is consistent with the requirements; valid encrypted space offer packages that meet the maximum token payment budget and whose service quality commitment identifiers meet the service quality level requirements are retained and listed in a priority order; the space smart contract combines the priority order list with the care request instructions and timestamp information to generate a decision log; the decision log contains the care request instructions, the list of valid encrypted space offer packages after priority ordering, and timestamp information; the matching score is determined based on the closeness of the service offer token quantity to the maximum token payment budget, the matching degree between the service availability time window and the service time range, and the degree of conformity between the service quality commitment identifier and the service quality level requirements;

[0084] Spatial smart contracts write pending decision logs into the blockchain ledger to achieve data storage and evidence preservation.

[0085] S3. Use the pending decision log to trigger the signing of virtual space experience tokens for elderly users and generate a space authorization card; make a judgment based on the risk identifier embedded in the space authorization card, and trigger the verification of family supervision tokens when the risk identifier is high risk; associate the verified supervision token signature with the space authorization card to generate a space execution token.

[0086] Furthermore, the spatial smart contract reads the latest generated decision log from the blockchain ledger;

[0087] The required number of virtual space experience tokens is determined based on the maximum token payment budget in the care needs instruction.

[0088] The space smart contract sends a confirmation request to elderly users regarding the use of virtual space experience tokens;

[0089] Elderly users receive a confirmation request for the use of virtual space experience tokens through their digital identity profile and complete the signing operation of the virtual space experience tokens in their digital identity profile. Specifically, the confirmation request for the use of virtual space experience tokens is converted into a standardized byte sequence format, including the service type identifier and the required number of virtual space experience tokens; the byte sequence of the confirmation request for the use of virtual space experience tokens is processed using the SHA-256 hash algorithm to generate a 256-bit hash value; and the 256-bit hash value is encrypted with the authentication private key using the ECDSA signature algorithm to generate a virtual space experience token signature result composed of an r value and a s value.

[0090] The signature result of the virtual space experience token for elderly users is returned to the space smart contract to verify its validity. Once the signature is confirmed, the space authorization token generation process is initiated. The verification process involves: extracting the digital signature and the byte sequence of the virtual space experience token usage confirmation request from the signature result. The byte sequence contains the service type identifier and the required number of virtual space experience tokens. The space smart contract queries the identity verification public key from the elderly user's digital identity profile. This public key is generated and stored in the digital identity profile when the elderly user registers in the virtual space nursing home ecosystem. The space smart contract uses the SHA-256 hash algorithm to process the byte sequence of the virtual space experience token usage confirmation request, generating a 256-bit hash value. The digital signature is decrypted using the authentication public key via ECDSA verification to obtain a 256-bit hash value. Specifically, the validity of the r and s values ​​is verified using the authentication public key and elliptic curve standard parameters, generating a 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 usage confirmation request byte sequence, while also confirming that the elderly user's digital identity file exists in the blockchain ledger and has not been tampered with. If the decrypted 256-bit hash value matches the 256-bit hash value and the elderly user's digital identity file is valid, the space smart contract determines that the virtual space experience token signature result is valid. If the hash values ​​do not match or the elderly user's digital identity file is invalid, the space smart contract determines that the virtual space experience token signature result is invalid.

[0091] An authorization data structure is constructed based on the nursing request instruction, the list of encrypted space offer packages, and the signature result of the virtual space experience token. Specifically, the following steps are taken: First, the service type identifier, unique request identifier, and timestamp information are extracted from the nursing request instruction; then, the valid encrypted space offer package with the highest matching score and meeting the maximum token payment budget and service quality level requirements is selected from the priority-ranked list of valid encrypted space offer packages, and the unique identity identifier of the service provider, the number of offer tokens, and the service quality commitment identifier are extracted; the space smart contract extracts the service type identifier and the required number of virtual space experience tokens from the signature result of the virtual space experience token; the space smart contract integrates the service type identifier, unique request identifier, timestamp information, unique identity identifier of the service provider, number of offer tokens, service quality commitment identifier, and required number of virtual space experience tokens into a standardized data format as the authorization data structure.

[0092] Multi-dimensional data fingerprint extraction is performed on the authorized data structure, and a unique identifier for the space authorization card is generated by combining the current block timestamp of the blockchain network, the unique identity of the service provider, and the timestamp of the care request instruction. Specifically, the authorized data structure is first converted into a standardized byte sequence format, containing serialized data including service type identifier, service quotation token quantity, service quality commitment identifier, unique request identifier, and timestamp information. Then, the byte sequence of the authorized data structure is processed using the SHA-256 hash algorithm to generate a 256-bit hash value. Specifically, the byte sequence of the authorized data structure is padded to a length that is a multiple of 512 bits, and padding bits and length information are added. The padded byte sequence of the authorized data structure 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 fixed constants defined in the SHA-2 standard. Each 512-bit data block undergoes 64 rounds of iterative processing. Each round uses logical functions, including bitwise AND, bitwise OR, bitwise XOR, bitwise NOT, right shift, and right rotation operations, to update eight working variables (A to H) in conjunction with a constant table and the data block content. After processing all 512-bit data blocks, the final eight working variables are concatenated into a 256-bit hash value, which serves as the hash value of the authorization data structure. The space smart contract obtains the current block timestamp from the blockchain ledger, extracts the service provider's unique identifier from the priority-sorted list of valid encrypted space quote packages, and extracts the nursing request instruction timestamp from the nursing request instruction. The space smart contract integrates the authorization data structure hash value, the current block timestamp, the service provider's unique identifier, and the nursing request instruction timestamp into a single byte sequence, performs SHA-256 hash algorithm processing, and generates a fixed-length 256-bit space authorization token unique identifier.

[0093] The unique identifier and authorization data structure of the space authorization token are encapsulated into a space authorization token, and the space authorization token is written into the blockchain ledger to achieve data storage and notarization.

[0094] The space smart contract reads the space authorization card held by elderly users from the blockchain ledger and parses the risk identifier in the space authorization card. Specifically: First, it locates the unique identifier of the space authorization card associated with the elderly user's digital identity file in the blockchain ledger; it uses the unique identifier of the space authorization card to search the blockchain ledger and extract the corresponding space authorization card data; then, it decodes the space authorization card data into a standardized data format, restoring the service type identifier, service price token quantity, service quality commitment identifier, unique request identifier, timestamp information, and risk identifier; the space smart contract extracts the risk identifier field from the decoded space authorization card data, the risk identifier field being a string with a fixed format; the space smart contract reads the string value of the risk identifier field, the string value being mapped to the risk level in the care request instruction as "high" indicating high risk or "low" indicating low risk, the mapping rule being predefined by the virtual space nursing home ecosystem and stored in the blockchain ledger; the space smart contract parses the string value, confirming that the risk identifier field value is "high" or "low", thereby determining the high-risk or low-risk status;

[0095] When the risk is flagged as high-risk, the space smart contract initiates verification of the family oversight token, including the following:

[0096] Send regulatory token usage confirmation requests to family accounts linked to the digital identity profiles of elderly users;

[0097] Family members receive regulatory token usage confirmation requests through their digital identity profiles and complete the regulatory token signing within those profiles.

[0098] The regulatory token signature result is verified by multi-signature weight and compared with the family member's behavioral characteristics. After confirming that the regulatory token signature result meets the preset verification strategy, the space execution token generation stage begins. Specifically, the digital signature and regulatory token usage confirmation request byte sequence are extracted from the regulatory token signature result. The space smart contract obtains the list of associated family member accounts from the elderly user's digital identity file. The family member account list contains the identity verification public key and preset family member supervision weight for each family member account. The family member supervision weight is allocated by the virtual space nursing home ecosystem based on the closeness of the family relationship when the family member account is registered and stored in the blockchain ledger.

[0099] The spatial smart contract uses the authentication public key of each family member account to perform ECDSA verification on the digital signature. Specifically, it processes the regulatory token, generates a 256-bit hash value using the confirmation request byte sequence, decrypts the digital signature using the authentication public key to obtain the decrypted hash value, and verifies that the decrypted hash value matches the 256-bit hash value to verify the authenticity of the digital signature. Subsequently, it extracts the historical behavior records of family member accounts from the blockchain ledger, including login frequency, signature operation records, and regulatory token usage history. It compares the signature timestamp of the regulatory token signature result with the behavior patterns in the family member account's historical behavior records to confirm whether the signature operation conforms to the family member account's regular behavior, such as whether the signature time falls within a common time period. Finally, the spatial smart contract determines the total weight of family member accounts that provided valid digital signatures based on the family member regulatory weight in the family member account list. Whether the minimum weight threshold of the preset verification strategy is met (e.g., a value range of 10 to 30) is determined. The verification strategy is defined by the virtual space nursing home ecosystem and stored in the blockchain ledger. If the digital signature is genuine, the signing operation conforms to the behavioral pattern in the family member's account history, and the total weight of the family member accounts with valid digital signatures reaches 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 stage. If the digital signature is not genuine, the signing operation does not conform to the behavioral pattern, or the total weight does not reach the minimum weight threshold, the space smart contract determines that the regulatory token signature result does not meet the verification strategy, refuses to enter the space execution token generation stage, and returns a verification failure message to the family member's account. The minimum weight threshold is set based on the verification strategy and is used to confirm whether the total weight of the family member accounts providing valid digital signatures is sufficient to meet the regulatory token signature verification.

[0100] The space authorization token and the regulatory token signature result are bound and encapsulated to form a space execution token data structure; the space execution token data structure contains a unique identifier for the space authorization token, the regulatory token signature result, and timestamp information;

[0101] The space execution token data structure is processed using the SHA-256 hash algorithm to generate a unique identifier for the space execution token;

[0102] The unique identifier of the space execution token is combined with the space execution token data structure to form the final space execution token;

[0103] The space execution token is written into the blockchain ledger to achieve data notarization, and the space execution token is returned to the elderly user's digital identity file and stored in the elderly user's virtual space permission directory.

[0104] S4. Activate the virtual space service task through the space execution token, and generate a blockchain-based evidence of the behavior trajectory using space motion capture; verify the behavior trajectory evidence with the health monitoring equipment occupancy parameters of the encrypted space quotation package by verifying the smart contract, trigger the revenue sharing settlement and update the service provider's virtual space service credit rating.

[0105] Furthermore, the system reads the space execution token from the elderly user's virtual space permission directory, performs dynamic multi-dimensional authorization status verification on the space execution token, and activates the virtual space service task after confirming that the verification policy is met; the details are as follows:

[0106] Extract the space execution token from the virtual space permission directory of elderly users, 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;

[0107] Extract the unique identifier of the space authorization card from the space execution token, and obtain the on-chain authorization status from the blockchain ledger based on the unique identifier of the space authorization card. The on-chain authorization status is "valid" or "invalid", which indicates whether the space authorization card can be used for service tasks.

[0108] Extract the valid encrypted space offer package with the highest matching score from the list of valid encrypted space offer packages that are prioritized and associated with the space execution token, confirm whether the service availability time window includes the service time range in the care demand instruction, and determine the validity of the service time window;

[0109] Risk markers are extracted from the space authorization plaques. These risk markers are either "high" or "low," and are mapped based on the risk level in the care needs instructions.

[0110] According to the definition of the virtual space nursing home ecosystem, the verification strategy is stored in the blockchain ledger. The verification strategy includes the on-chain authorization status being "valid", the service availability time window including the service time range and the risk label being "high" or "low". The space smart contract sequentially confirms the validity of the space execution token unique identifier, the on-chain authorization status being "valid", the service availability time window including the service time range and the risk label being "high" or "low".

[0111] If the unique identifier of the space execution token is valid, the on-chain authorization status is "valid", the service availability time window includes the service time range, and the risk identifier meets all the conditions of "high" or "low", then the space execution token is deemed to meet the verification policy, and the virtual space service task is activated. If the unique identifier of the space execution token is invalid, the on-chain authorization status is "invalid", the service availability time window does not include the service time range, and the risk identifier does not meet any of the conditions of "high" or "low", then the space execution token is deemed to not meet the verification policy, the activation of the virtual space service task is refused, and a verification failure message is returned to the elderly user's digital identity file.

[0112] After the virtual space service task is started, spatial motion capture is invoked to monitor the behavior of elderly users in real time; three-dimensional spatial motion data of elderly users are collected through wearable health monitoring devices; the three-dimensional spatial motion data includes motion trajectory coordinates, motion duration, motion intensity and motion timestamp;

[0113] The collected 3D spatial motion data is encapsulated into behavior trajectory data packages and submitted to the blockchain ledger through a spatial smart contract;

[0114] The SHA-256 hash algorithm is used to generate a unique identifier for the behavior trajectory credential from the behavior trajectory data packet;

[0115] The unique identifier of the behavior trajectory credential is combined with the behavior trajectory data packet to form a behavior trajectory credential, which is then written into the on-chain data block to achieve data storage.

[0116] Verify the behavior trajectory data package and the unique identifier of the behavior trajectory credential read by the smart contract;

[0117] The process involves: decrypting the encrypted space quote package using the space key bound to the service provider; the encrypted space quote package containing digitally signed space quote content; specifically: first, extracting the space key from the service provider's digital identity file, which is bound to the service provider's unique identifier; verifying the smart contract to extract the encrypted space quote content byte sequence from the encrypted space quote package; using the space key to decrypt the encrypted space quote content byte sequence using the AES-256 symmetric encryption algorithm, specifically: using the space key as the input key to initialize the AES-256 algorithm's decryption mode; dividing the encrypted space quote content byte sequence into 128-bit data blocks; performing a decryption operation on each 128-bit data block, generating the decrypted space quote content byte sequence through the inverse transformation of the AES-256 algorithm, including inverse byte substitution, inverse row shift, inverse column obfuscation, and inverse key expansion; restoring the decrypted space quote content byte sequence to the service quote token quantity, service availability time window hash value, and service quality commitment identifier; and verifying the integrity of the decrypted space quote content byte sequence through the smart contract, confirming that the service quote token quantity, service availability time window hash value, and service quality commitment identifier are consistent with the digital signature, and generating the space quote content.

[0118] The process involves extracting space pricing content from encrypted space pricing packages, parsing behavior trajectory data packets, and obtaining the actual values ​​of health monitoring device occupancy parameters. Specifically, this includes: first, decrypting the encrypted space pricing package using the space key bound to the service provider, restoring the existing space pricing content byte sequence, and converting the space pricing content byte sequence into the number of service pricing tokens, the hash value of the service availability time window, and the service quality commitment identifier; then, extracting the behavior trajectory data packet byte sequence from the behavior trajectory data packet, decoding the behavior trajectory data packet byte sequence into a standardized data format, and restoring the action trajectory coordinates, action duration, action intensity, and action timestamp; finally, extracting the actual values ​​of health monitoring device occupancy parameters from the decoded behavior trajectory data packet, which include the health monitoring device's running time, usage frequency, and monitoring accuracy.

[0119] Extract the declared values ​​of health monitoring equipment occupancy parameters promised by the service provider from the space quotation;

[0120] Compare the actual values ​​of the health monitoring device occupancy parameters with the declared values ​​of the health monitoring device occupancy parameters to determine the device type conformity; device type conformity is determined based on whether the health monitoring device type in the actual values ​​of the health monitoring device occupancy parameters is the same as the health monitoring device type in the declared values ​​of the health monitoring device occupancy parameters.

[0121] The difference rate between the actual values ​​and declared values ​​of the occupancy parameters of the health monitoring equipment is calculated using the following expression:

[0122] ;

[0123] in, The percentage of parameters occupied by health monitoring equipment represents the relative difference between the actual and declared values ​​of the parameters occupied by the health monitoring equipment, expressed as a percentage. The actual values ​​of the health monitoring device occupancy parameters are extracted from the behavior trajectory data packet, including the health monitoring device's running time (in hours), usage frequency (number of data collections per minute), and monitoring accuracy (in millimeters). The declared values ​​for the occupancy parameters of the health monitoring equipment are extracted from the space quotation content, including the health monitoring equipment's operating time (in hours), usage frequency (in minutes of data collection), and monitoring accuracy (in millimeters).

[0124] When the health monitoring device type is compatible and the difference rate does not exceed the preset matching threshold, the verification smart contract generates a matching success event. The matching threshold is set by the virtual space nursing home ecosystem based on the performance requirements of the health monitoring device and the service quality level requirements, for example, the value range is 5% to 20%. The matching success event includes the unique identifier of the service provider, the unique identifier of the behavior trajectory certificate, the actual value of the health monitoring device's occupied parameters, the declared value of the health monitoring device's occupied parameters, and the health monitoring device type compatibility confirmation result.

[0125] The matching degree achievement event triggers the revenue sharing and settlement operation. After the revenue sharing and settlement operation is completed, the virtual space service credit rating in the service provider's digital identity profile is updated.

[0126] It should be noted that the matching degree meets the standard, which means that the actual value of the health monitoring equipment's occupied parameters is consistent with the declared value of the health monitoring equipment's occupied parameters and the difference rate does not exceed the matching degree threshold. It also confirms that the health monitoring equipment provided by the service provider has consistent operating time, usage frequency and monitoring accuracy with the values ​​promised by the service provider in the space quotation (including the health monitoring equipment's operating time, usage frequency and monitoring accuracy).

[0127] This embodiment also provides a blockchain-based virtual space nursing home ecosystem, including:

[0128] 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.

[0129] 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.

[0130] The verification module is used to trigger the signing of virtual space experience tokens for elderly users using the decision-making logs to generate space authorization tokens; it makes a judgment based on the risk identifier embedded in the space authorization token, 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 token to generate a space execution token;

[0131] 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.

[0132] This embodiment also provides a computer device applicable to the blockchain-based virtual space nursing home ecosystem method, comprising: a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to implement the blockchain-based virtual space nursing home ecosystem method proposed in the above embodiment.

[0133] The computer device can be a terminal, comprising a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0134] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the blockchain-based virtual space nursing home ecosystem method proposed in the above embodiments. The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0135] In summary, this invention achieves intelligent optimization of nursing service response schemes by using a particle swarm optimization algorithm to compare and dynamically match and rank encrypted space quotation packages based on multi-dimensional attributes. This solves the technical problems of low service matching efficiency and significant subjective judgment interference in virtual space nursing homes. The particle swarm optimization algorithm constructs an objective function and iteratively optimizes particle states based on key parameters such as service quality level, time window matching degree, and the number of quotation tokens, thereby quickly selecting the optimal matching result from multiple candidate service schemes. This method does not rely on a centralized scheduling mechanism and can achieve highly efficient and transparent service matching in a decentralized environment, improving the response speed and quality of services for elderly users while enhancing fair competition among service providers.

[0136] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

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 is generated by space motion capture and stored on the blockchain. 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 standard, triggering revenue sharing and settlement and updating the service provider's virtual space service credit rating. 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; Extract all valid encrypted space quote packages from the queue; initialize the particle swarm optimization algorithm in the space smart contract, treating each valid encrypted space quote package as a particle, with particle attributes including the number of service quote tokens, the hash value of the service availability time window, and the service quality commitment identifier; define the objective function based on the service quality level requirements, maximum token payment budget, and risk level in the care demand instruction, and iteratively update the position and velocity of each particle; after a preset number of iterations, select the particle set with the optimal objective function value to generate a dynamic optimal matching list; Based on the unique identity of the service provider in the dynamic optimal matching list, the number of quoted tokens, the service quality commitment identifier, and the matching score, priority sorting and filtering operations are performed to generate a decision log; The decision log includes nursing need instructions, a list of encrypted space quotation packages that are sorted by priority, and timestamp information.

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 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.

4. The blockchain-based virtual space nursing home ecosystem method as described in claim 3, 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.

5. 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; After the virtual space service task is launched, three-dimensional spatial motion data of elderly users are 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.

6. 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 5, 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.

7. 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 5.

8. 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 5.

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