Commodity transaction method and system of block chain smart contract

Abstract

The invention discloses a commodity transaction method and system for a block chain smart contract, and relates to the technical field of smart contracts, and the method comprises the steps: generating an entanglement particle pair through a quantum key distribution protocol, and generating an initial contract parameter package; when the commodity arrives at the logistics key node, generating a space-time stamp hash value, and writing the space-time stamp hash value into the block chain to generate a logistics event voucher; the intelligent contract monitors the logistics event voucher and outputs a verification signal to trigger payment; when the buyer and the seller are objection to the verification result, the smart contract randomly selects an arbitration node through a dark matter detector network; after zero-knowledge proof verification, weighted voting is carried out according to rules, funds are released through a cross-chain protocol, and the commodity ownership is unlocked; after arbitration and verification are completed, the smart contract calls a cross-chain protocol to release funds to the seller, and a closed-loop transaction voucher is formed; through the quantum entanglement particle pair and the gravitational wave sensor, high-precision time-space stamp verification is realized, and authenticity and non-tampering of logistics events are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of smart contracts, and particularly to a commodity trading method and system for blockchain smart contracts. Background Art

[0002] With the development of e-commerce and blockchain technology, the application of smart contracts in commodity trading has become increasingly widespread. Existing smart contract systems usually rely on traditional encryption technologies and timestamp services to ensure the security and immutability of transactions. However, these methods often have problems such as insufficient verification and easy data tampering when facing complex logistics environments and potential disputes. Especially in cross-border transactions, due to the involvement of multiple parties and different legal systems, how to ensure the authenticity and fairness of transactions has become a major challenge.

[0003] Although the existing technology has been able to achieve a certain degree of security guarantee, there are still deficiencies in actual operation. For example, traditional timestamp services are difficult to provide high-precision time synchronization, resulting in inaccurate event verification within the time window. In addition, the existing arbitration mechanism lacks sufficient randomness and transparency, is easily affected by human intervention, and cannot effectively resolve disputes between buyers and sellers. Summary of the Invention

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

[0005] Therefore, the present invention provides a commodity trading method for blockchain smart contracts, which solves the problems of inaccurate verification at key logistics nodes and opaque arbitration mechanism of traditional smart contracts.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: In a first aspect, the present invention provides a commodity trading method for blockchain smart contracts, which includes generating an entangled particle pair through a quantum key distribution protocol, deploying a smart contract using the entangled particle pair, and generating an initial contract parameter package; When the commodity reaches a key logistics node, the logistics terminal collects logistics data and triggers a gravitational wave sensor to capture a gravitational wave waveform, generates a spacetime timestamp hash value, and writes the spacetime timestamp hash value into the blockchain to generate a logistics event voucher; The smart contract monitors the logistics event voucher, verifies it through the entangled particle pair and the gravitational wave waveform, and outputs a verification signal to trigger payment; When the buyer and the seller have objections to the verification result, the smart contract randomly selects an arbitration node through a dark matter detector network; The arbitration node obtains quantum state measurement logs, gravitational wave waveforms, and logistics historical data through an oracle network, verifies them with zero-knowledge proofs, and then votes with weights according to rules. The smart contract counts the results and determines the fund flow direction; After arbitration and verification are completed, funds are released through the cross-chain protocol and the ownership of the goods is unlocked, forming a closed-loop transaction voucher.

[0007] As a preferred solution of the commodity trading method of the blockchain smart contract described in the present invention, wherein: an entangled particle pair is generated through the quantum key distribution protocol, and the smart contract is deployed by using the entangled particle pair. The steps for generating the initial contract parameter package include the following, Through a spontaneous parametric down-conversion crystal, particles A and B are generated under laser pumping; The collapse time window of particle A is encoded as the time lock condition of the smart contract and written into the Solidity contract of the Ethereum-compatible chain; The polarization state information of particle B is transmitted to the logistics terminal through quantum encryption and written into the secure storage area; The public key addresses of the buyer and seller, the transaction amount, and the commodity code are synchronously recorded in the smart contract. When the smart contract is deployed, the blockchain generates an initial contract parameter package including the quantum time window hash value, the commodity code, and the fund escrow address.

[0008] As a preferred solution of the commodity trading method of the blockchain smart contract described in the present invention, wherein: the timestamp hash value is obtained by inputting the logistics data and the gravitational wave waveform into a hash function; The key logistics nodes include customs, warehouses, and signing points; The logistics data includes GPS coordinates, timestamps, and temperature and humidity data.

[0009] As a preferred solution of the commodity trading method of the blockchain smart contract described in the present invention, wherein: verification is performed through entangled particle pairs and gravitational wave waveforms, and the output verification signal triggers payment, including the following steps, After the smart contract monitors a logistics event, it sends a polarization measurement instruction to the logistics terminal through a quantum satellite; The logistics terminal measures the polarization direction within the collapse time window of particle B and transmits the measurement result back through the quantum satellite; The smart contract compares the polarization basis sequences of particles A and B, calculates the Bell inequality parameter S value, and verifies that the quantum entanglement is not destroyed; Based on the gravitational wave waveform, the LIGO open API is called for waveform matching verification; When both the verification of the entangled particles and the gravitational wave waveform pass, the smart contract outputs a verification passed signal to trigger payment, otherwise arbitration is initiated.

[0010] As a preferred solution of the commodity trading method of the blockchain smart contract described in the present invention, wherein: randomly selecting arbitration nodes includes the following steps, The smart contract connects to the dark matter detector network to obtain the collision timestamp and the collision energy value; Input the collision timestamp and collision energy value into the NIST SP 800-90B standard entropy extraction algorithm to generate a true random number seed; Based on the true random number seed, use the Fisher-Yates algorithm to unbiasedly select arbitration nodes and dynamically allocate weights according to the collision energy value.

[0011] As a preferred solution of the commodity trading method of the blockchain smart contract described in the present invention, wherein: after verification by zero-knowledge proof, weighted voting is carried out according to rules, and the smart contract counts the results and determines the fund flow, including the following steps, Use the zk-STARK protocol to generate zero-knowledge proof to verify that the quantum state measurement log, gravitational wave waveform, and logistics historical data have not been tampered with; The arbitration node evaluates the evidence according to the INCOTERMS 2020 rules, and writes the voting result and weight onto the blockchain; The smart contract counts the total weight, and automatically releases the funds to the seller's address according to the proportion of the weight supporting the seller, otherwise returns to the buyer.

[0012] As a preferred solution of the commodity trading method of the blockchain smart contract described in the present invention, wherein: forming a closed-loop trading voucher includes the following steps, The smart contract calls the quantum time window hash value locking protocol to complete the atomic exchange of USDC and NFT bills of lading between the Ethereum and Polygon chains, and obtains the decryption key; The buyer receives the decryption key and unlocks the commodity ownership certificate in the intelligent logistics cabinet through the decryption key; When picking up the goods, the logistics cabinet collects the GPS coordinates and spatio-temporal stamp hash value again, generates a closed-loop trading voucher and writes it onto the blockchain.

[0013] In a second aspect, the present invention provides a commodity trading system for a blockchain smart contract, including a quantum contract module, which is responsible for generating entangled particle pairs through the quantum key distribution protocol, deploying a smart contract using the entangled particle pairs, and generating an initial contract parameter package; A spatio-temporal verification module, which is responsible for when the commodity reaches a key logistics node, the logistics terminal collects logistics data, triggers a gravitational wave sensor to capture a gravitational wave waveform, generates a spatio-temporal stamp hash value, writes the spatio-temporal stamp hash value onto the blockchain to generate a logistics event voucher; the smart contract monitors the logistics event voucher, verifies through the entangled particle pairs and the gravitational wave waveform, and outputs a verification signal to trigger payment; A dispute arbitration module, which is responsible for when the buyer and seller have objections to the verification result, the smart contract randomly selects arbitration nodes through the dark matter detector network; the arbitration node obtains the quantum state measurement log, gravitational wave waveform, and logistics historical data through the oracle network, verifies by zero-knowledge proof and votes with weights according to rules, and the smart contract counts the results and determines the fund flow; The payment and settlement module is responsible for releasing funds and unlocking the ownership of goods through a cross-chain protocol after arbitration and verification are completed, forming a closed-loop transaction voucher.

[0014] In a third aspect, the present invention provides a computer device, including a memory and a processor, where the memory stores a computer program, and: when the computer program is executed by the processor, any step of the commodity trading method of the blockchain smart contract as described in the first aspect of the present invention is implemented.

[0015] In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and: when the computer program is executed by the processor, any step of the commodity trading method of the blockchain smart contract as described in the first aspect of the present invention is implemented.

[0016] The beneficial effects of the present invention are as follows: High-precision timestamp verification is achieved through quantum entangled particle pairs and gravitational wave sensors, ensuring the authenticity and immutability of logistics events. Specifically, smart contracts are deployed using quantum entangled particle pairs, combined with gravitational wave sensors to capture spacetime distortion waveforms, generate timestamp hash values and write them into the blockchain, forming immutable logistics event vouchers. This high-precision timestamp verification not only improves the accuracy of logistics event verification but also enhances the security of the entire trading process. When disputes occur, true random number seeds are generated through a dark matter detector network, randomly selecting and assigning weights to arbitration nodes, and zero-knowledge proofs are used to verify data integrity, ensuring the fairness and transparency of the arbitration process. Finally, funds are released and the ownership of goods is unlocked through a cross-chain protocol, forming a closed-loop transaction voucher, greatly improving the reliability and efficiency of transactions, fundamentally solving the problems of inaccurate verification of key logistics nodes and opaque arbitration mechanisms in traditional smart contracts, and providing more secure, efficient, and fair technical support for commodity trading in complex logistics environments. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a flowchart of the commodity trading method of the blockchain smart contract in Embodiment 1.

[0019] Figure 2 It is a flowchart of the initial contract deployment in Embodiment 1.

[0020] Figure 3 It is a diagram of the generation and verification of logistics event vouchers in Embodiment 1.

[0021] Figure 4 This is a flowchart of arbitration node selection and verification in Example 1.

[0022] Figure 5 This is a closed-loop transaction voucher generation diagram in Example 1. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Example 1, reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , which is the first embodiment of the present invention, and this embodiment provides a commodity trading method for a blockchain smart contract, comprising the following steps: S1, generating entangled particle pairs through a quantum key distribution protocol, using the entangled particle pairs to deploy smart contracts, and generating an initial contract parameter package.

[0027] Generate particles A and B under laser pumping through spontaneous parametric down-conversion crystals (such as β-barium borate crystals); It should be noted that the process of generating particles A and B utilizes nonlinear optical effects, which split high-energy photons into two low-energy photons (particles A and B) under certain conditions. Particles A and B are entangled with each other in quantum state. The entanglement property makes it possible for measuring the state of one particle to immediately affect the state of the other particle, no matter how far apart they are. The collapse time window of particle A (e.g. UTC time 2023-10-01 09:00-10:00) is encoded as a time lock condition of the smart contract and written into the Solidity contract of the Ethereum compatible chain; The polarization state information of particle B is transmitted to the logistics terminal (such as NXP NTAG 424 DNA chip) through quantum encryption and written into the secure storage area; The public key addresses (starting with 0x), transaction amount (USDC), and product code (RFID serial number) of both the buyer and seller are synchronously recorded in the smart contract. When the smart contract is deployed, the blockchain generates an initial contract parameter package containing the quantum time window hash value, product code, and fund escrow address.

[0028] It should be noted that the time window of quantum entanglement depends on the physical collapse process and cannot be predicted or tampered with by algorithms, solving the vulnerability of traditional time locks to computational attacks. The product RFID code is directly associated with the quantum time window hash, ensuring the synchronization of the logistics link and fund escrow at the physical level and preventing the risk of "separation of goods and bills". It provides a credible initial data anchor for subsequent logistics event verification and arbitration.

[0029] S2. When the goods reach a key logistics node, the logistics terminal collects logistics data and triggers the gravitational wave sensor to capture the gravitational wave waveform, generating a timestamp hash value. The timestamp hash value is written into the blockchain to generate a logistics event voucher.

[0030] The key logistics nodes include customs, warehouses, and signing points; the logistics data includes GPS coordinates (accuracy ±1 meter, Beidou / GPS dual-mode positioning), timestamp (Swiss Microchip SA.45s chip, error <1 nanosecond), and temperature and humidity data (temperature and humidity sensor: Honeywell HDC2010, accuracy ±2%RH).

[0031] The node type where the goods arrive is automatically identified through the IoT tag. When the goods enter the node range, the logistics terminal (such as in-vehicle / handheld terminal) activates the data collection process through the near-field communication protocol and synchronously sends a trigger signal to the gravitational wave sensor; After receiving the trigger signal, the gravitational wave sensor (such as a laser interferometer array) collects the raw gravitational wave waveform data within a 10-millisecond window before and after the event timestamp (frequency range 10Hz~10kHz) and extracts the waveform features (such as amplitude peak, frequency distribution); The gravitational wave waveform is associated with the timestamp and GPS coordinates of the logistics data to ensure that the data corresponds to the same physical space-time event (for example, product A enters the customs at 31.23°N, 121.47°E at 12:00:00.000000001); The logistics data (GPS coordinates, timestamp, temperature and humidity) and the gravitational wave waveform features are encapsulated in a standardized structure (JSON-LD format), and the node type identifier (such as customs) and device digital signature (signed by the private key of the logistics terminal) are added; Calculate the hash value of the encapsulated data using an anti-quantum hash algorithm (such as the SHA-3 extension) to generate a spatio-temporal timestamp hash value; Write the spatio-temporal timestamp hash, node metadata (device ID, sensor model), and event time range (start - end timestamp) to the blockchain to generate an immutable logistics event voucher and trigger the smart contract verification ready status; It should be noted that the correlation check between the gravitational wave waveform and the logistics data ensures that the event occurs at real spatio-temporal coordinates (such as customs locations), preventing virtual forgery or location drift. The temperature and humidity, GPS, and gravitational wave waveform are encapsulated in JSON-LD format to meet the evidence standardization requirements of multiple jurisdictions in international trade (such as WTO data compliance). Provide structured input for double verification and raw data for zero-knowledge proof in arbitration.

[0032] S3. The smart contract monitors the logistics event voucher, verifies it through entangled particle pairs and gravitational wave waveforms, and outputs a verification signal to trigger payment.

[0033] After the smart contract monitors a logistics event, it sends a polarization measurement instruction to the logistics terminal via a quantum satellite. The polarization measurement instruction includes entangled particle pairs (such as particle A / B numbers), a measurement basis sequence (such as horizontal / vertical or 45° / 135° basis), and a collapse time window (such as 10 nanosecond-level synchronization); The logistics terminal measures the polarization direction (such as 45° or 135°) within the collapse time window of particle B and transmits the measurement result back via the quantum satellite; The smart contract calculates the correlation by comparing the polarization basis sequences of particles A and B to obtain the Bell inequality parameter S value (the calculation formula satisfies the CHSH inequality). If the S value > 2.8 (the classical theory upper limit is 2, and it can reach 2√2 ≈ 2.828 in the quantum entanglement state), it is determined that the quantum entanglement is not destroyed and the measurement data of the logistics terminal is credible; Based on the gravitational wave waveform, call the LIGO open API for waveform matching verification. According to the timestamp and GPS coordinates of the logistics event, obtain the historical gravitational wave waveform data (frequency range, amplitude peak) at the corresponding spatio-temporal point (such as customs coordinates), and compare the consistency of the gravitational wave waveform characteristics (such as the main frequency peak 10kHz ± 0.1%) in the logistics event with the LIGO data. If the frequency error < 0.1% and the amplitude error < 1%, it is determined that the spatio-temporal timestamp hash matches the physical event; When both the entangled particle and gravitational wave waveform verifications pass, the smart contract outputs a verification passed signal to trigger payment. If any verification fails, the smart contract automatically freezes the funds, calls the on-chain logistics event voucher, quantum measurement log, and LIGO data, and initiates a multi-party (buyer, logistics party, customs) collaborative arbitration process.

[0034] It should be noted that quantum verification prevents eavesdropping on communication links, and gravitational wave verification prevents forgery of space-time coordinates. The two complement each other to form a "quantum-classical" double moat. The design with a frequency error <0.1% and an amplitude error <1% takes into account both scientific rigor and the tolerance of actual sensor fluctuations, reducing the false positive rate. Trigger automated adjudication for payment or freezing of funds, and provide a traceable verification log for arbitration.

[0035] S4. When the buyer and seller have objections to the verification result (or when the verification fails), the smart contract randomly selects arbitration nodes through the dark matter detector network.

[0036] The smart contract connects to the dark matter detector network (such as the CDEX laboratory) through a decentralized oracle, and real-time monitors the collision events between dark matter particles and the detection medium. When arbitration is triggered, the smart contract obtains the collision timestamps and collision energy values in the previous 30 seconds; Concatenate the collision timestamps (continuous time series) and collision energy values (discrete numerical values) into the original entropy pool, and input them into the NIST SP 800-90B standard entropy extraction algorithm. The NIST SP 800-90B standard entropy extraction algorithm eliminates low-entropy segments through health tests (such as repeated counting, adaptive ratio), and generates a truly random number seed that meets cryptographic strength; Based on the truly random number seed, use the Fisher-Yates algorithm to perform unbiased shuffling on the candidate arbitration nodes, and select 21 candidate arbitration nodes as arbitration nodes; Dynamically allocate weights according to the collision energy value. If the energy value > 10 keV (the dark matter suspected signal threshold), the voting weight of the node is 3, and the rest is 1; It should be noted that a single arbitration node may correspond to multiple collision events (such as 3 collisions > 10 keV). The final weight takes the maximum value (such as an arbitration node associated with 3 high-energy collisions, the weight is still 3). The weight allocation logic is publicly verifiable on the chain, but the mapping relationship between the node and the energy value is encrypted before the voting is completed to prevent nodes from colluding in advance. The dark matter suspected signal threshold is based on the known background noise level of the dark matter detector (such as XENON1T) (usually < 5 keV). Setting the dark matter suspected signal threshold to 10 keV can effectively distinguish cosmic rays or conventional particle interference (low-energy events) from suspected dark matter signals (high-energy events), ensuring that high-weight nodes correspond to more significant physical events; It should be noted that the unpredictability of dark matter collisions far exceeds that of traditional pseudo-random algorithms, fundamentally preventing the premeditated manipulation of node selection. High-energy events (> 10 keV) correspond to more likely real physical signals, giving high-weight nodes higher adjudication power and enhancing the scientific nature of arbitration. Ensure the fairness of arbitration and provide irreversible random conditions for cross-chain settlement.

[0037] S5. The arbitration node obtains quantum state measurement logs, gravitational wave waveforms, and logistics historical data through the oracle network, verifies them using zero-knowledge proofs, and then conducts weighted voting according to rules. The smart contract tallies the results and determines the fund flow direction.

[0038] It should be noted that the quantum state measurement log is a set of physical layer data recording key parameters such as the generation, transmission, and measurement of photon polarization states during the communication process of entangled particle pairs. Its core function is to provide tamper-proof quantum physical evidence for verifying the integrity and anti-eavesdropping property of the communication process, especially as the core component of a multi-dimensional evidence chain in the arbitration process. It should be noted that the oracle network (such as the Chainlink quantum adapter) accesses the quantum satellite. Based on the quantum state polarization angles and the arrival timestamps of entangled particle pairs (accurate to the picosecond level) in the quantum state measurement log, it generates the original measurement hash value (SHA3-512). The oracle calls the LIGO / Virgo observatory API to obtain the gravitational wave waveform (such as the waveform of the GW150914 event) within the disputed time window, extracts eigenvalue features such as the frequency peak (50 - 250 Hz) and signal-to-noise ratio (SNR > 8), and performs a light cone consistency check with the spatio-temporal coordinates of the logistics event. Internet of Things devices (such as container NB-IoT sensors) upload temperature, humidity, vibration, and position trajectory data, and generate tamper-proof certificates through an industrial blockchain (such as VeChain).

[0039] Generate zero-knowledge proofs using the zk-STARK protocol to verify that the quantum state measurement logs, gravitational wave waveforms, and logistics historical data have not been tampered with (such as the integrity of quantum satellite communication). It should be noted that using the zk-STARK protocol, the quantum state measurement data is converted into polynomial constraint relations. Input the photon polarization sequence (0°, 45°, 90°, 135°) and the detector response time matrix, and constrain the verification of Bell's inequality (S value ≤ 2√2) and the quantum bit error rate < 0.5%. The 0.5% value adopts the quantum communication industry standard (such as the Chinese QKD technical specification). When the error rate is lower than 0.5%, quantum key distribution (QKD) is considered safe and available. Exceeding this value may indicate that the channel has been eavesdropped or there is a hardware failure. Output the STARK proof file (containing 8 million polynomial evaluation points) and the verification key. The LIGO laboratory runs the STARK proof generator to perform Fourier transform and wavelet noise reduction processing on the gravitational wave waveform to generate a waveform matching degree proof. The arbitration node evaluates the evidence (such as the quantum state polarization sequence, gravitational wave waveform features, logistics spatio-temporal coordinates, etc.) according to the INCOTERMS 2020 rules. After multiplying the voting result (supporting the buyer / seller) by the weight, it is written onto the blockchain. It should be noted that the INCOTERMS 2020 rules are international trade term rules formulated by the International Chamber of Commerce, which define 11 standardized delivery terms (such as FOB, CIF, etc.), clarify the responsibility boundaries between the buyer and the seller in goods transportation, risk transfer, and cost sharing, and ensure the clarity and unity of the global trade process; dynamically adjust the voting weight based on the historical adjudication accuracy rate of arbitration nodes (such as 85% accuracy rate in the past 3 years); The smart contract calculates the total weight. When the weight in support of the seller accounts for ≥66%, 66% refers to international arbitration practices (such as the UNCITRAL Arbitration Rules), and a supermajority (close to 67%) is set to enhance the authority of the adjudication, avoid disputes that may be caused by a simple majority (51%), and at the same time reserve a 33% error tolerance space to prevent misjudgment, and automatically release the funds to the seller's address, otherwise return them to the buyer.

[0040] It should be noted that zero-knowledge proofs ensure that sensitive data (such as polarization angles) can be verified without being exposed in plain text, which complies with privacy regulations such as GDPR. Compile the INCOTERMS clauses into executable weight rules (such as CIF clause × 1.5 weight) to achieve seamless connection between legal provisions and smart contracts. Drive the determination of the fund flow direction and provide an adjudication basis for the end-to-end audit trail.

[0041] S6. After arbitration and verification are completed, release the funds and unlock the ownership of the goods through a cross-chain protocol to form a closed-loop transaction voucher.

[0042] The smart contract calls the quantum time window hash value locking protocol to complete the atomic exchange of USDC and NFT bills of lading between the Ethereum and Polygon chains. After the cross-chain atomic exchange is successful, the buyer's wallet (such as MetaMask) automatically obtains the decryption key; It should be noted that based on the arbitration result, the smart contract generates a quantum time window hash lock on the Ethereum mainnet, locks the USDC stablecoin and sets two conditions: one is that the NFT bill of lading (ERC-721S standard) on the Polygon chain must submit a 64-bit quantum random number hash preimage generated by extracting the dark matter collision entropy source according to the NIST SP 800-90B standard within 120 seconds, and the other is that the timestamp must match the exact delivery time window of the arbitration judgment (such as UTC 2023-12-01 12:00:00±30 seconds); synchronously deploy a mirror contract on the Polygon chain to lock the encrypted bill of lading NFT, and the metadata includes the logistics cabinet number, the hash of the temperature control sensor calibration certificate, and the 3D point cloud cargo fingerprint, and ensure that the hash preimage cannot be cracked by the Shor algorithm through quantum-resistant design, realizing the security of cross-chain atomic exchange and the irreversibility of condition triggering.

[0043] The buyer receives the decryption key (encrypted with AES-256), and unlocks the ownership certificate of the goods (ERC-721 NFT) in the intelligent logistics cabinet through the decryption key; When picking up the goods, the logistics cabinet collects the GPS coordinates and the hash value of the space-time stamp again, generates a closed-loop transaction certificate and writes it onto the blockchain to form an end-to-end audit trail.

[0044] It should be noted that the end-to-end audit trail includes the manufacturing end, the transportation end, and the delivery end. The manufacturing end is the raw material RFID tag (EPC Gen2 standard), the transportation end is the LORA temperature and humidity log of the sea container, and the delivery end is the usage record of quantum random numbers when picking up the goods (to prevent key replay attacks).

[0045] It should be explained that the hash preimage depends on the dark matter entropy source to ensure that the cross-chain conditions cannot be forged or intercepted by a third party. From the manufacturing end RFID to the delivery end usage record of quantum random numbers, a verifiable space-time evidence chain is formed to meet the audit requirements of multiple parties such as customs and insurance. Finally, the technical advantages of the present invention are realized as commercial value, achieving the global trusted transfer of funds - goods - data.

[0046] This embodiment also provides a commodity trading system for a blockchain smart contract, including: a quantum contract module, responsible for generating entangled particle pairs through the quantum key distribution protocol, deploying smart contracts using the entangled particle pairs, and generating an initial contract parameter package; A space-time verification module, responsible for when the goods reach key logistics nodes, the logistics terminal collects logistics data, triggers the gravitational wave sensor to capture the gravitational wave waveform, generates a space-time stamp hash value, writes the space-time stamp hash value onto the blockchain to generate a logistics event certificate; the smart contract monitors the logistics event certificate, verifies through the entangled particle pairs and the gravitational wave waveform, and outputs a verification signal to trigger payment; A dispute arbitration module, responsible for when the buyer and seller have objections to the verification result, the smart contract randomly selects arbitration nodes through the dark matter detector network; the arbitration nodes obtain the quantum state measurement log, the gravitational wave waveform, and the logistics historical data through the oracle network, verify them with zero-knowledge proof and vote with weights according to the rules, and the smart contract counts the results and determines the fund flow direction; A payment and delivery module, responsible for after arbitration and verification, releasing funds and unlocking the ownership of goods through a cross-chain protocol to form a closed-loop transaction certificate.

[0047] This embodiment also provides a computer device, applicable to the situation of the commodity trading method of the blockchain smart contract, including: 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 commodity trading method of the blockchain smart contract proposed in the above embodiment.

[0048] The computer device may be a terminal, which includes a processor, a memory, a communication interface, a display screen, and an input device connected via a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner, and the wireless manner 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, and the input device of the computer device can be a touch layer covering the display screen, or buttons, a trackball, or a touchpad provided on the outer shell of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0049] This embodiment also provides a storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the commodity trading method for implementing blockchain smart contracts as proposed in the above embodiment; 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 (Static Random Access Memory, abbreviated as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, abbreviated as EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, abbreviated as EPROM), programmable read-only memory (Programmable Red-Only Memory, abbreviated as PROM), read-only memory (Read-Only Memory, abbreviated as ROM), magnetic memory, flash memory, a magnetic disk, or an optical disc.

[0050] In summary, the present invention realizes high-precision space-time stamp verification through quantum entangled particle pairs and gravitational wave sensors, ensuring the authenticity and immutability of logistics events. Specifically, intelligent contracts are deployed using quantum entangled particle pairs, combined with gravitational wave sensors to capture space-time distortion waveforms, generate space-time stamp hash values and write them into the blockchain to form an immutable logistics event certificate. This high-precision space-time stamp verification not only improves the accuracy of logistics event verification but also enhances the security of the entire transaction process. When disputes occur, true random number seeds are generated through the dark matter detector network, randomly selecting and assigning weights to arbitration nodes, and zero-knowledge proofs are used to verify data integrity to ensure the fairness and transparency of the arbitration process. Finally, funds are released and the ownership of goods is unlocked through a cross-chain protocol to form a closed-loop transaction certificate, greatly improving the reliability and efficiency of transactions, fundamentally solving the problems of inaccurate verification at key logistics nodes and opaque arbitration mechanisms in traditional intelligent contracts, and providing more secure, efficient and fair technical support for commodity transactions in complex logistics environments.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A commodity trading method based on blockchain smart contracts, characterized in that: include, Generate entangled particle pairs through the quantum key distribution protocol, use the entangled particle pairs to deploy smart contracts, and generate initial contract parameter packages; When the goods arrive at the key logistics node, the logistics terminal collects logistics data and triggers the gravitational wave sensor to capture the gravitational wave waveform, generates a time-space stamp hash value, and writes the time-space stamp hash value into the blockchain to generate a logistics event certificate; Smart contracts monitor logistics event credentials, verify them through entangled particle pairs and gravitational wave waveforms, and output verification signals to trigger payments; When the buyer and seller disagree on the verification result, the smart contract randomly selects an arbitration node through the dark matter detector network; The arbitration node obtains quantum state measurement logs, gravitational wave waveforms, and logistics history data through the oracle network, and then uses zero-knowledge proofs to verify and then votes weightedly according to the rules. The smart contract then calculates the results and determines the flow of funds. After arbitration and verification are completed, funds are released and commodity ownership is unlocked through a cross-chain protocol, forming a closed-loop transaction certificate.

2. The commodity trading method of blockchain smart contract as claimed in claim 1, characterized in that: The following steps are involved in generating entangled particle pairs through the quantum key distribution protocol, deploying smart contracts using entangled particle pairs, and generating the initial contract parameter package: Through spontaneous parametric down-conversion crystal, particles A and B are generated under laser pumping; The collapse time window of particle A is encoded as a time lock condition of the smart contract and written into the Solidity contract of the Ethereum compatible chain; The polarization state information of particle B is transmitted to the logistics terminal through quantum encryption and written into the secure storage area; The public key addresses of the buyer and seller, the transaction amount and the product code are recorded synchronously in the smart contract. When the smart contract is deployed, the blockchain generates an initial contract parameter package containing the quantum time window hash value, product code and fund custody address.

3. The commodity trading method of blockchain smart contract as claimed in claim 1, characterized in that: The time-space stamp hash value is obtained by inputting the logistics data and the gravitational wave waveform into the hash function; The key logistics nodes include customs, warehouses and signing points; The logistics data includes GPS coordinates, timestamp, and temperature and humidity data.

4. The commodity trading method of blockchain smart contract as claimed in claim 3, characterized in that: Verification is performed through entangled particle pairs and gravitational wave waveforms, and the output of verification signals to trigger payment includes the following steps: After the smart contract monitors the logistics event, it sends a polarization measurement instruction to the logistics terminal via the quantum satellite; The logistics terminal measures the polarization direction within the collapse time window of particle B and transmits the measurement results back via the quantum satellite; The smart contract compares the polarization basis sequences of particles A and B, calculates the value of Bell’s inequality parameter S, and verifies that quantum entanglement has not been destroyed; Based on the gravitational wave waveform, call the LIGO open API to perform waveform matching verification; When both the entangled particles and the gravitational wave waveform verification are passed, the smart contract outputs a verification pass signal to trigger payment, otherwise arbitration is initiated.

5. The commodity trading method of blockchain smart contract as claimed in claim 4, characterized in that: Randomly selecting an arbitration node includes the following steps: The smart contract connects to the dark matter detector network to obtain the collision timestamp and collision energy value; Input the collision timestamp and collision energy value into the NIST SP 800-90B standard entropy extraction algorithm to generate a true random number seed; Based on true random number seeds, the Fisher-Yates algorithm is used to unbiasedly select arbitration nodes, and weights are dynamically assigned according to the collision energy value.

6. The commodity trading method of blockchain smart contract as claimed in claim 5, characterized in that: After verification by zero-knowledge proof, weighted voting is performed according to the rules. The smart contract counts the results and determines the flow of funds, including the following steps: Use the zk-STARK protocol to generate zero-knowledge proofs to verify that quantum state measurement logs, gravitational wave waveforms, and logistics history data have not been tampered with; The arbitration node evaluates the evidence according to the INCOTERMS 2020 rules and writes the voting results and weights to the blockchain; The smart contract calculates the total weight and automatically releases funds to the seller's address based on the weight ratio supporting the seller, otherwise the funds will be returned to the buyer.

7. The commodity trading method of blockchain smart contract as claimed in claim 6, characterized in that: The formation of a closed-loop transaction voucher includes the following steps: The smart contract calls the quantum time window hash value locking protocol to complete the atomic exchange of USDC and NFT bills between Ethereum and Polygon chains and obtain the decryption key; The buyer receives the decryption key and uses it to unlock the product ownership certificate in the smart logistics cabinet; When picking up the goods, the logistics cabinet collects the GPS coordinates and time-space stamp hash value again, generates a closed-loop transaction certificate and writes it to the blockchain.

8. A commodity trading system based on a blockchain smart contract, based on the commodity trading method based on a blockchain smart contract according to any one of claims 1 to 7, characterized in that: include, The quantum contract module is responsible for generating entangled particle pairs through the quantum key distribution protocol, using entangled particle pairs to deploy smart contracts, and generating initial contract parameter packages; The space-time verification module is responsible for collecting logistics data at the logistics terminal when the goods arrive at the key logistics nodes, triggering the gravitational wave sensor to capture the gravitational wave waveform, generating a space-time stamp hash value, and writing the space-time stamp hash value into the blockchain to generate a logistics event certificate; the smart contract monitors the logistics event certificate, verifies it through the entangled particle pair and the gravitational wave waveform, and outputs a verification signal to trigger payment; The dispute arbitration module is responsible for when the buyer and seller disagree with the verification results. The smart contract randomly selects an arbitration node through the dark matter detector network. The arbitration node obtains the quantum state measurement log, gravitational wave waveform and logistics history data through the oracle network, and uses zero-knowledge proof to verify and vote according to the rules. The smart contract counts the results and determines the flow of funds. The payment and delivery module is responsible for releasing funds and unlocking the ownership of goods through the cross-chain protocol after arbitration and verification are completed, forming a closed-loop transaction certificate.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the commodity trading method of the blockchain smart contract described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the commodity trading method of the blockchain smart contract described in any one of claims 1 to 7 are implemented.

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