Order agricultural double-insurance financing method based on block chain, electronic equipment and storage medium

Abstract

The invention belongs to the technical field of agricultural financial services, and provides an order agricultural double-insurance financing method based on a block chain, electronic equipment and a storage medium. The method comprises the steps of original farmer data collection, desensitization processing, objective data acquisition, key parameter calculation, total data integration and chaining, intelligent contract setting, integrity verification, application material generation, final interest rate calculation, electronic financing contract signing, block chain operation and block chain supervision. According to the method, the double-layer hash chain is constructed, the desensitization data, the objective data and the key parameters are integrated to form total data, and the total data are synchronized to all nodes of the block chain, so that the data security and tamper-proofing capability of the block chain are further improved; objective data are accessed to the block chain, so that the data counterfeiting risk is further reduced, and the supervision capability and the information sharing capability are improved; and through double insurance contract system chaining, manual intervention is avoided, and authenticity is ensured.

Description

Technical Field

[0001] This invention relates to the field of agricultural financial services technology, and in particular to a blockchain-based double-insurance financing method for order agriculture, electronic equipment, and storage medium. Background Technology

[0002] Order agriculture, also known as contract agriculture or contract farming, is an agricultural production and management model in which supply and demand parties sign a purchase and sale contract based on profit calculations, and farmers produce according to the contract requirements, implementing production based on sales.

[0003] However, the application of contract farming faces the following problems: 1) Contract farming financing information is at risk of being tampered with. Under the contract farming financing model, producers need to provide data on production orders, sales orders, inventory, and financial status as support for financing applications. However, this data may be tampered with or forged, making it impossible for financial institutions to accurately assess the producer's credit risk and repayment ability, thus affecting financing decisions. Furthermore, producers may deliberately overestimate order quantities or sales prices, or underestimate costs or inventory levels to obtain more financing support, or exaggerate their production and sales capabilities by forging orders or sales records to obtain more financing. 2) Data opacity in contract farming financing. The contract farming industry chain involves many participants, such as farmers, distributors, and financial institutions. Farmers find it difficult to provide accurate production data and financing needs, and financial institutions also find it difficult to obtain farmers' credit status and repayment ability. Information asymmetry exists among the participants, making data acquisition difficult. In addition, contract farming financing involves multiple stages, including production, acquisition, and sales. Data from these stages is difficult to integrate and manage, leading to a complex financing process and increasing financing costs and time. Furthermore, due to the lack of data transparency, regulatory authorities find it difficult to effectively supervise contract farming financing, leading some participants to exploit regulatory loopholes and engage in illegal activities, increasing financial risks. The lack of data transparency in contract farming financing makes it difficult to guarantee data authenticity, restricts data sharing and circulation, complicates financing processes, and makes supervision difficult, thereby increasing financing risks and reducing financing efficiency. 3) Data traceability in contract farming financing is difficult. Contract farming involves a long agricultural production cycle, from planting to harvesting, during which financial institutions struggle to monitor the progress of agricultural production in real time, increasing the difficulty of tracing financing information. Contract farming typically involves a large number of small farmers, with orders scattered across different regions and farmers, making it difficult to trace financing information. Agricultural production is also affected by natural disasters, pests, and other factors, leading to a decline in yield and quality, affecting the authenticity and accuracy of financing information. In addition, there is information asymmetry between farmers and financial institutions; financial institutions struggle to understand the actual production situation of farmers, and farmers struggle to understand the financing requirements and risk control measures of financial institutions. Therefore, when affected by uncertain factors such as weather and market prices, financial institutions find it difficult to assess the risks of financing projects and accurately predict potential risks. Furthermore, since contract farming projects cover a wide geographical area, financial institutions cannot conduct on-site supervision of all projects, which increases the difficulty of supervision. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, the purpose of this invention is to provide a blockchain-based double-insurance financing method, electronic device, and storage medium for contract farming, thereby solving the problems of data tampering, information asymmetry, limited risk coverage, and low financing efficiency in existing contract farming financing methods.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A blockchain-based double-insurance financing method for order-based agriculture includes:

[0007] The original farmer data is collected from the target agricultural cooperatives; the original farmer data includes: basic order information and production support information; the basic order information includes: farmer identification, crop variety, agreed yield, contract purchase price, and delivery time; the production support information includes: family planting area, past performance records, and intended insurance.

[0008] The farmer data is anonymized using a differential privacy method to obtain anonymized farmer data.

[0009] Objective data are acquired using field sensors, satellite remote sensing, and regional agricultural product market APIs; the objective data includes: temperature and humidity, rainfall, crop growth status, regional spot prices, and regional futures prices.

[0010] Based on the anonymized farmer data and the objective data, the farmer credit score and dynamic disaster threshold are calculated to obtain key parameters; the key parameters include: farmer credit rating and personalized disaster trigger threshold;

[0011] The de-identified farmer data, the objective data, and the key parameters are integrated to obtain full data, a hash chain is constructed, and the full data is synchronized to preset blockchain nodes according to the hash chain; the hash chain includes: farmer order hash value and cooperative-level hash value;

[0012] A natural disaster insurance contract and a price fluctuation insurance contract are set up, and the natural disaster insurance contract and the price fluctuation insurance contract are converted into smart contracts and uploaded to the blockchain; the natural disaster insurance contract includes: a personalized disaster trigger threshold, an agreed insurance coefficient, and a claims processing time; the price fluctuation insurance contract includes: a futures-spot linkage deviation rate, a fluctuation threshold, and an insurance coefficient;

[0013] The smart contract is verified for integrity. After the verification is successful, a contract hash value is generated based on the smart contract. The contract hash value is then associated with and stored with the farmer's order hash value.

[0014] Application materials are generated through the blockchain; the application materials include: basic materials and auxiliary materials; the basic materials include: the hash chain and the contract hash value; the auxiliary materials include: the crop growth status, the regional spot price, and the farmer's estimated repayment ability;

[0015] The smart contract is used to verify the compliance of the application materials. After the verification is passed, the interest rate is dynamically priced using a preset interest rate formula to obtain the final interest rate.

[0016] The electronic financing contract is signed using the blockchain, and the flow of funds is recorded and uploaded to the blockchain to generate a hash value for the financing funds. The electronic financing contract includes: the agreed loan amount, repayment period, and repayment method.

[0017] During the operation of the blockchain, smart contracts are used to control the triggering and claims settlement of dual insurance based on the full amount of data, and the blockchain is monitored in real time for compliance and traced throughout its entire lifecycle through government regulatory nodes.

[0018] Preferably, during the operation of the blockchain, smart contracts are used to control the triggering and claims processing of the dual insurance based on the full data, and the blockchain is monitored in real time for compliance and traced throughout its entire lifecycle through government regulatory nodes, including:

[0019] When the blockchain detects that the target meteorological data exceeds the personalized disaster trigger threshold, the natural disaster insurance contract is triggered.

[0020] The disaster loss rate was determined based on the aforementioned objective data;

[0021] Based on the disaster loss rate, a first automatic claim amount is generated using a preset first claim amount formula. The claim amount is then transferred to the farmer's account, and the claim record is uploaded to the blockchain.

[0022] Preferably, during the operation of the blockchain, smart contracts are used to control the triggering and claims processing of the dual insurance based on the full data, and the blockchain is monitored in real time for compliance and traced throughout its entire lifecycle through government regulatory nodes, including:

[0023] The deviation rate between the spot price and the futures price in the region is calculated to obtain the futures-spot linkage deviation rate.

[0024] When the futures-spot linkage deviation rate exceeds the volatility threshold, the price volatility insurance contract is triggered.

[0025] A second automatic claim amount is generated using a preset second claim amount formula based on the regional spot price, the regional futures price, and the insurance coefficient. The claim amount is then transferred to the farmer's account based on the second automatic claim amount, and the claim record is uploaded to the blockchain.

[0026] Preferably, during the operation of the blockchain, smart contracts are used to control the triggering and claims processing of the dual insurance based on the full data, and the blockchain is monitored in real time for compliance and traced throughout its entire lifecycle through government regulatory nodes, including:

[0027] Set the compliant range for contracted pricing, the time for subsidy payments to be received, and the range of constraints for financing interest rates;

[0028] When the on-chain data of the blockchain does not comply with any of the following: the agreed pricing compliance range, the subsidy arrival time, or the financing interest rate constraint range, a compliance warning is triggered and the compliance warning is sent to the government regulatory node.

[0029] Define the query scope; the query scope includes: the scope of farmers' viewing, the scope of financial institutions' viewing, and the scope of government viewing; the scope of farmers' viewing includes: order progress, insurance claim status, and financing repayment plan; the scope of financial institutions' viewing includes: the basis for calculating farmers' credit scores, the authenticity of insurance coverage, and assessment of loan risk; the scope of government viewing includes: subsidy recipients and the reasons for claim triggers.

[0030] Identify the access object, determine the viewing scope of the access object based on the query scope, and send the target viewing data to the node corresponding to the access object when the access object accesses the blockchain.

[0031] Preferably, the expression for the farmer's credit score is: ;in, Assign credit scores to farmers; , , These are respectively the weighting of the performance rate, the compliance rate, and the insurance coverage rate; Historical contract fulfillment rate; For data compliance rate; For insurance coverage rate.

[0032] Preferably, the expression for the dynamic disaster threshold is:

[0033] ;in, The personalized disaster trigger threshold; The basic disaster threshold for crops; , , These are respectively the climate weighting coefficient, the crop disaster resistance weighting coefficient, and the historical risk weighting coefficient; As an indicator of regional climate variability; For crop varieties' disaster resistance indicators; The frequency of historical disasters in the region.

[0034] Preferably, the expression for the farmer's order hash value is:

[0035] ;in, The hash value of the farmer's order; It is a hash encryption algorithm; Identify the farmers mentioned above; The agreed output; The contract purchase price; The order's basic information is uploaded to the blockchain using a timestamp.

[0036] The expression for the cooperative-level hash value is:

[0037] ;in, The cooperative-level hash value; This refers to the aggregated hash value from the previous round of the cooperative's data collection. Aggregate timestamps for cooperatives; This refers to the total number of farmers within the cooperative.

[0038] Preferably, the expression for the futures-spot linkage deviation rate is: ;in, The aforementioned futures-spot linkage deviation rate; Real-time prices in the futures market; The contract purchase price; Real-time prices for regional agricultural products in the spot market.

[0039] Preferably, an electronic device includes: at least one processor and a memory communicatively connected to the processor; wherein the memory stores instructions executable by the processor, the instructions being executed by the processor to enable the processor to perform the aforementioned blockchain-based order agriculture double insurance financing method.

[0040] Preferably, a non-transitory computer-readable storage medium stores computer instructions for causing a computer to execute the aforementioned blockchain-based order agriculture double-insurance financing method.

[0041] The present invention discloses the following technical effects:

[0042] This invention provides a blockchain-based double-insurance financing method, electronic device, and storage medium for contract farming. By constructing a two-layer hash chain, it solves the problem of data tampering in existing contract farming financing methods, achieving a multi-layered anti-tampering design. By uploading multi-source objective data to the chain, it solves the problems of data opacity and information asymmetry, achieving information symmetry among multiple parties. Through double-insurance smart contracts, it solves the problem of single risk coverage, reducing farmers' default rates due to risks. Through automated compliance verification and dynamic interest rate pricing of smart contracts, it solves the problem of low efficiency in manual financing, shortening the financing application cycle. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. 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.

[0044] Figure 1 A schematic diagram of a blockchain-based double-insurance financing process for order agriculture provided in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the natural disaster insurance contract triggering process provided in an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the price fluctuation insurance contract triggering process provided in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the blockchain supervision and traceability process provided in an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of a double-insurance financing model provided in an embodiment of the present invention. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] The purpose of this invention is to provide a blockchain-based double-insurance financing method, electronic device, and storage medium for contract farming, which solves the problems of data tampering, information asymmetry, limited risk coverage, and low financing efficiency in existing contract farming financing methods.

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

[0052] Figure 1 This is a schematic diagram of a blockchain-based double-insurance financing process for order agriculture, as provided in an embodiment of the present invention. Figure 1 As shown, this invention provides a blockchain-based double-insurance financing method for order agriculture, comprising:

[0053] Step 100: Collect original farmer data from target farmers through the target agricultural cooperative; the original farmer data includes: basic order information and production support information; the basic order information includes: farmer identification, crop variety, agreed yield, contract purchase price, and delivery time; the production support information includes: family planting area, past performance records, and intended insurance.

[0054] Step 200: De-identify the farmer data using the differential privacy method to obtain de-identified farmer data;

[0055] Step 300: Obtain objective data using field sensors, satellite remote sensing, and regional agricultural product market APIs; the objective data includes: temperature and humidity, rainfall, crop growth status, regional spot price, and regional futures price;

[0056] Step 400: Calculate the farmer credit score and dynamic disaster threshold based on the anonymized farmer data and the objective data to obtain key parameters; the key parameters include: farmer credit rating and personalized disaster trigger threshold;

[0057] Step 500: Integrate the de-identified farmer data, the objective data, and the key parameters to obtain full data, construct a hash chain, and synchronize the full data to preset blockchain nodes according to the hash chain; the hash chain includes: farmer order hash value and cooperative-level hash value;

[0058] Step 600: Set up a natural disaster insurance contract and a price fluctuation insurance contract, convert the natural disaster insurance contract and the price fluctuation insurance contract into smart contracts, and upload the smart contracts to the blockchain; the natural disaster insurance contract includes: the personalized disaster trigger threshold, the agreed insurance coefficient, and the claims processing time; the price fluctuation insurance contract includes: the futures-spot linkage deviation rate, the fluctuation threshold, and the insurance coefficient;

[0059] Step 700: Perform integrity verification on the smart contract. After successful verification, generate a contract hash value based on the smart contract and store the contract hash value in association with the farmer's order hash value.

[0060] Step 800: Generate application materials through the blockchain; the application materials include: basic materials and auxiliary materials; the basic materials include: the hash chain and the contract hash value; the auxiliary materials include: the crop growth status, the regional spot price, and the farmer's estimated repayment ability;

[0061] Step 900: Use the smart contract to verify the compliance of the application materials. After the verification is passed, use the preset interest rate formula to dynamically price the interest rate and obtain the final interest rate.

[0062] Step 1000: Sign an electronic financing contract using the blockchain, upload the fund flow record to the blockchain, and generate a financing fund hash value; the electronic financing contract includes: agreed loan amount, repayment period, and repayment method;

[0063] Step 1100: During the operation of the blockchain, the triggering and claims settlement of the double insurance are controlled by smart contracts based on the full data, and the blockchain is monitored for compliance in real time and traced throughout its entire life cycle through government regulatory nodes.

[0064] refer to Figure 2 During the operation of the blockchain, smart contracts are used to control the triggering and claims processing of dual insurance based on the full amount of data. Furthermore, government regulatory nodes conduct real-time compliance monitoring and full lifecycle traceability of the blockchain, including:

[0065] Step 1101: When the blockchain detects that the target meteorological data exceeds the personalized disaster trigger threshold, the natural disaster insurance contract is triggered;

[0066] Step 1102: Measure the disaster loss rate based on the objective data;

[0067] Step 1103: Generate a first automatic claim amount based on the disaster loss rate using a preset first claim amount formula, transfer the claim amount to the farmer's account based on the first automatic claim amount, and upload the claim record to the blockchain.

[0068] refer to Figure 3 During the operation of the blockchain, smart contracts are used to control the triggering and claims processing of dual insurance based on the full amount of data. Furthermore, government regulatory nodes conduct real-time compliance monitoring and full lifecycle traceability of the blockchain, including:

[0069] Step 1104: Calculate the deviation rate between the spot price and the futures price in the region to obtain the futures-spot linkage deviation rate;

[0070] Step 1105: When the futures-spot linkage deviation rate exceeds the volatility threshold, the price volatility insurance contract is triggered;

[0071] Step 1106: Generate a second automatic claim amount using a preset second claim amount formula based on the regional spot price, the regional futures price, and the insurance coefficient. Transfer the claim amount to the farmer's account based on the second automatic claim amount and upload the claim record to the blockchain.

[0072] refer to Figure 4During the operation of the blockchain, smart contracts are used to control the triggering and claims processing of dual insurance based on the full amount of data. Furthermore, government regulatory nodes conduct real-time compliance monitoring and full lifecycle traceability of the blockchain, including:

[0073] Step 1107: Set the compliance range for the agreed price, the time for the subsidy to be received, and the range of constraints for the financing interest rate;

[0074] Step 1108: When the on-chain data of the blockchain does not comply with any of the following: the agreed pricing compliance range, the subsidy arrival time, or the financing interest rate constraint range, a compliance warning is triggered and the compliance warning is sent to the government regulatory node.

[0075] Step 1109: Set the query scope; the query scope includes: the scope of farmers' viewing, the scope of financial institutions' viewing, and the scope of government viewing; the scope of farmers' viewing includes: order progress, insurance claim status, and financing repayment plan; the scope of financial institutions' viewing includes: the basis for calculating farmers' credit scores, the authenticity of insurance coverage, and the assessment of loan risk; the scope of government viewing includes: subsidy recipients and the reasons for claim triggering;

[0076] Step 1110: Determine the access object, and determine the viewing scope of the access object according to the query scope, and send the target viewing data to the node corresponding to the access object when the access object accesses the blockchain.

[0077] Specifically, the expression for the farmer's credit score is as follows: ;in, Assign credit scores to farmers; , , These are respectively the weighting of the performance rate, the compliance rate, and the insurance coverage rate; Historical contract fulfillment rate; For data compliance rate; For insurance coverage rate.

[0078] Furthermore, the expression for the dynamic disaster threshold is:

[0079] ;in, The personalized disaster trigger threshold; The basic disaster threshold for crops; , , These are respectively the climate weighting coefficient, the crop disaster resistance weighting coefficient, and the historical risk weighting coefficient; As an indicator of regional climate variability; For crop varieties' disaster resistance indicators; The frequency of historical disasters in the region.

[0080] Specifically, the expression for the farmer's order hash value is:

[0081] ;in, The hash value of the farmer's order; It is a hash encryption algorithm; Identify the farmers mentioned above; The agreed output; The contract purchase price; The order's basic information is uploaded to the blockchain using a timestamp.

[0082] The expression for the cooperative-level hash value is:

[0083] ;in, The cooperative-level hash value; This refers to the aggregated hash value from the previous round of the cooperative's data collection. Aggregate timestamps for cooperatives; This refers to the total number of farmers within the cooperative.

[0084] Furthermore, the expression for the futures-spot linkage deviation rate is: ;in, The aforementioned futures-spot linkage deviation rate; Real-time prices in the futures market; The contract purchase price; Real-time prices for regional agricultural products in the spot market.

[0085] refer to Figure 5 A blockchain-based dual-insurance financing model for order-based agriculture. This includes a natural disaster insurance model.

[0086] 1) Under the blockchain framework, each participant is an independent node. Insured farmers log into the blockchain system platform to enter their name, home address, contact information, agricultural experience, agricultural products, and insurance records, thus creating an insurance file. Insurance companies enter their company licenses, operating permits, and personnel and product information into the blockchain platform. Personnel information includes name, gender, professional field description, and work ability evaluation; product information includes rates, insurance types, and insurance periods. Insured farmers can browse relevant information on the blockchain platform and compare and select suitable insurance companies, insurance products, and agents. When a farmer applies for insurance, the insurance agent logs into the blockchain platform and, with the farmer's authorization, can access the farmer's file information with one click, simplifying the form-filling process for farmers. The insurance agent can quickly understand the insured's credit information through the file.

[0087] 2) Internet technology enables data sensing and image collection of agricultural natural information such as weather, soil, and crop pests, allowing for monitoring of crop growth in contract farming and generating log files. Combined with blockchain technology, this information can be automatically packaged and uploaded to the chain for shared access across the entire blockchain. Before agricultural disasters occur, the combination of artificial intelligence and blockchain, utilizing neural networks to learn from past disaster cases, allows for pre-disaster prediction. This prediction information is then shared in real-time with disaster management departments through the blockchain platform, enabling timely development of prevention and control plans. During agricultural disasters, internet technology collects disaster information, and the blockchain platform transmits this information in real-time to disaster relief personnel, facilitating the development of reasonable disaster relief plans. After an agricultural disaster occurs, blockchain smart contract technology can translate insurance contract content into corresponding computer code. Triggering the contract mechanism after an agricultural disaster triggers the blockchain platform to provide timely claims services, reducing intermediate steps, accelerating claims processing, and saving on agricultural insurance operating costs.

[0088] 3) Agricultural insurance requires connecting multiple departments, including insurance institutions, technology companies, agricultural cooperatives, farmers, and enterprises. Utilizing the decentralized nature of blockchain enables real-time data sharing throughout the process, creating a new intelligent management framework. Furthermore, blockchain's timestamping technology solidifies the time sequence of data, facilitating data traceability and preventing multiple insurance applications. Blockchain encryption algorithms ensure the authenticity and validity of agricultural internet data, forming an immutable data chain. Blockchain technology guarantees the authenticity, validity, and traceability of insurance data. Through its immutable technology, real-time disaster information is stored in the blockchain system, reducing the manpower and material costs of on-site investigations for insurance companies.

[0089] 4) Due to the diverse types and wide scope of agricultural insurance monitoring, agricultural insurance monitoring work is quite difficult to carry out. Utilizing the distributed mechanism of blockchain can achieve monitoring in different fields and in different ways. Within the blockchain system, the government can coordinate the review, process management, and transaction supervision of contract farming insurance business, monitoring the entire process of contract farming insurance development and improving management level and efficiency. Supervising the insurance process of contract farming through the blockchain system can promote the improvement of relevant laws and regulations, protecting the legitimate rights and interests of both parties in contract farming through legal means, and preventing monopolies, insurance institutions abusing their power, and contracts that harm farmers' interests. The government can also use the blockchain system to monitor whether agricultural cooperatives are paying the full amount of insurance compensation to affected farmers, protecting the legitimate rights and interests of every affected person.

[0090] Price fluctuation insurance model:

[0091] 1) To prevent excessive price fluctuations in agricultural products during contract farming and protect their own interests, agricultural cooperatives purchase contract farming insurance from insurance companies through a blockchain system. They pay insurance premiums to the insurance companies, sign insurance contracts, and upload them to the blockchain system. In order to further transfer the risk, insurance companies purchase over-the-counter options products from futures companies through the blockchain system. After the futures are sold and circulated in the market, the risk is further transferred to securities market investors to hedge against the potential risks brought about by agricultural product price fluctuations. Futures trading information is recorded on the blockchain. Based on blockchain distributed storage technology and encryption algorithms, data between insurance companies and futures companies can be effectively accessed by setting permissions.

[0092] 2) Leveraging the open nature of blockchain technology, data from all regions across the country can be viewed in real time, providing valuable insights for decision-making. By integrating basic data from governments, insurance companies, and futures companies, a unified business platform can be built. This platform allows micro-enterprises and farmers to freely choose terms and insurance product types from a unified business view, and to obtain real-time information on rates, processing procedures, and related formalities. Furthermore, utilizing the public nature of blockchain, hedging operations from various futures companies can be shared, improving the success rate of hedging operations and potentially reducing hedging fees and market operation costs.

[0093] 3) The government can use the blockchain platform to monitor futures trading market information, standardize futures market rules, promptly identify problems and conduct legal construction, and guide the effective transfer of risks in contract farming futures. Through the blockchain platform, the government can provide subsidies and assistance to participants in contract farming facing financial pressure. Big data analysis can be used to set criteria for determining subsidy eligibility and optimal subsidy ratios based on blockchain-based contract farming information, thus providing timely and effective financing support for contract farming.

[0094] refer to Figure 5 Double-insurance financing model:

[0095] 1) Agricultural cooperatives sign agricultural order contracts with enterprises. The agricultural cooperatives promise to deliver the corresponding agricultural products within the time specified in the contract, while the enterprises promise to pay the agricultural cooperatives at the price specified in the contract upon purchase of the agricultural products. Electronic contracts are signed and uploaded to a blockchain platform. When agricultural cooperatives submit applications for agricultural order financing to financial institutions, they submit the agricultural order contracts, agricultural product natural disaster insurance contracts, and agricultural order price fluctuation insurance contracts as collateral for double-insurance financing. Financial institutions verify the relevant contract information signed by agricultural cooperatives through the blockchain platform. The immutability and traceability of the blockchain increase the financial institutions' willingness to invest in agricultural cooperatives. After verifying the information, the financial institutions agree with the agricultural cooperatives on the loan amount, repayment amount, and repayment period, and sign the corresponding financing contract, which is then uploaded to the blockchain platform. Through blockchain smart contract technology, the financing contract is formalized. When the contract mechanism is triggered, the blockchain system can automatically and quickly carry out the financing activity.

[0096] 2) In past agricultural financing, information asymmetry between farmers and financial institutions has hindered the development of agricultural finance loans. Financial institutions can allocate credit based on the data they possess, while farmers, unable to provide valid information to prove their repayment ability, face difficulties. Blockchain technology addresses this by making farmers, agricultural cooperatives, financial institutions, insurance companies, futures companies, and enterprises all system nodes. These nodes share information such as order details, futures risk transfer information, and financial institution loan information through identity verification, enabling interconnectivity among participants and significantly reducing information asymmetry. This establishes a new trust mechanism for order-based agricultural financing.

[0097] 3) Difficult credit investigation, complex procedures, and time-consuming processes have always been significant obstacles to agricultural financing. Using blockchain technology, financial institutions can verify the past information of farmers applying for financing through identity verification. Once an order for financing is confirmed, the information is written into the blockchain and broadcast to all nodes, ensuring that duplicate transactions do not occur. Furthermore, using blockchain smart contract technology, signed orders can be contractualized. Farmers, agricultural cooperatives, purchasing companies, financial institutions, futures institutions, insurance institutions, and other entities can update the agricultural financing process information in real time through the blockchain platform. When the smart contract mechanism is triggered, the blockchain system will automatically initiate the financing transaction.

[0098] 4) Given the high transparency of the blockchain system, government regulatory departments can clearly access the basic information of each insurance project and, through the banking system, ensure that fiscal subsidies go directly to projects and agricultural enterprises and farmers, eliminating the need for multiple layers of funding and guaranteeing the effectiveness of special support funds. The government can coordinate various participants in the industrial chain by monitoring the operational process of contract farming financing on the blockchain platform. By monitoring the contract terms in contract farming financing, the government can promptly identify whether purchasing companies have included unfair terms and take timely action. Furthermore, the government can supervise the financing mechanisms of financial institutions in contract farming financing, protect the legitimate rights and interests of agricultural cooperatives, standardize financing practices, formulate relevant laws and regulations, and promote a virtuous cycle in contract farming.

[0099] Specifically, the blockchain-based double-insurance financing method for contract farming involves collecting raw data from target farmers through target agricultural cooperatives. This data is categorized into two types: basic order information and production support information. Basic order information includes farmer identification, crop variety, agreed yield, contract purchase price, and delivery time. Production support information includes family planting area, past performance records, and intended insurance intentions. To protect farmer privacy, this embodiment employs a differential privacy method to anonymize this raw farmer data, resulting in anonymized farmer data. Simultaneously, objective data is acquired through field sensors, satellite remote sensing technology, and regional agricultural product market APIs. This data includes temperature and humidity, rainfall, crop growth status, and regional spot and futures prices reflecting market conditions, providing multi-source data support for subsequent analysis.

[0100] Further, key parameter calculations are performed. Combining the anonymized farmer data with the aforementioned objective data, the focus is on calculating two key parameters: farmer credit score and dynamic disaster threshold. This ultimately forms the farmer credit rating and personalized disaster trigger threshold. The farmer credit score is calculated using the following formula:

[0101]

[0102] In the formula, Assign credit scores to farmers; , , These are respectively the weighting of the performance rate, the compliance rate, and the insurance coverage rate; Historical contract fulfillment rate; For data compliance rate; For insurance coverage rate.

[0103] The formula for calculating the dynamic disaster threshold is as follows:

[0104]

[0105] In the formula, Personalized disaster trigger thresholds; The basic disaster threshold for crops; , , These are respectively the climate weighting coefficient, the crop disaster resistance weighting coefficient, and the historical risk weighting coefficient; As an indicator of regional climate variability; For crop varieties' disaster resistance indicators; The frequency of historical disasters in the region.

[0106] Furthermore, anonymized farmer data, objective data, and calculated key parameters are integrated into a complete dataset, and a two-layer hash chain is constructed to ensure data security. The first layer uses the SHA-256 hash encryption algorithm to encrypt the hash values ​​of farmer orders, with the following formula:

[0107]

[0108] In the formula, For farmers' order hash values; It is a hash encryption algorithm; Identify farmers; For agreed production volume; The contract purchase price; Add a timestamp to the blockchain for basic order information.

[0109] The other layer is the cooperative-level hash value, calculated using the following formula:

[0110]

[0111] In the formula This is a cooperative-level hash value; This refers to the aggregated hash value from the previous round of the cooperative's data collection. Aggregate timestamps for cooperatives; This refers to the total number of farmers within the cooperative.

[0112] Once the data is built, all data will be synchronized to each node of the pre-defined blockchain via a hash chain to ensure that the data is immutable.

[0113] Specifically, in terms of contract system construction, two types of insurance contracts are established: natural disaster insurance contracts and price fluctuation insurance contracts. These two types of contracts are then converted into smart contracts and uploaded to the blockchain. The natural disaster insurance contract includes the previously calculated personalized disaster trigger threshold, the agreed insurance coefficient, and the claims processing time; the price fluctuation insurance contract involves the futures-spot linkage deviation rate, the volatility threshold, and the insurance coefficient. The futures-spot linkage deviation rate is as follows:

[0114]

[0115] In the formula, Forecast-current linkage deviation rate; Real-time prices in the futures market; The contract purchase price; Real-time prices for regional agricultural products in the spot market.

[0116] After the smart contract is uploaded, it will first undergo integrity verification. Once the verification is successful, a contract hash value will be generated and stored in association with the farmer's order hash value to form a complete contract data chain.

[0117] Further, the process moves to the financing application and pricing stage. The blockchain automatically generates financing application materials, including basic and supplementary materials. Basic materials include the previously constructed hash chain and contract hash value, while supplementary materials cover crop growth status, regional spot prices, and farmers' estimated repayment ability. Next, a smart contract verifies the compliance of the application materials. Upon successful verification, a dynamic interest rate is determined using a preset interest rate formula, resulting in the final financing interest rate. After pricing, both parties sign an electronic financing contract via the blockchain. The contract clearly stipulates the loan amount, repayment period, and repayment method. Simultaneously, the flow of funds is recorded and uploaded to the blockchain, generating a financing fund hash value to ensure traceability of fund transfers.

[0118] Preferably, during blockchain operation, on the one hand, based on full data, smart contracts automatically control the triggering and claims settlement of dual insurance: when the monitored target meteorological data exceeds the personalized disaster trigger threshold, the natural disaster insurance contract is triggered, the disaster loss rate is determined based on objective data, and the automatic claim amount is calculated using a preset first claim amount formula, the claim payment is transferred to the farmer's account and the claim record is uploaded; when the calculated futures-spot linkage deviation rate exceeds the fluctuation threshold, the price fluctuation insurance contract is triggered, and the automatic claim amount is calculated using a preset second claim amount formula, combined with the regional spot price, regional futures price and insurance coefficient, and the record is uploaded after the claim is completed. On the other hand, real-time compliance monitoring and full lifecycle traceability are achieved through government regulatory nodes. First, the compliance range of the agreed price, the time of subsidy payment, and the range of financing interest rate constraints are set. If the data on the chain does not meet any of these ranges, a compliance warning is triggered and sent to the government regulatory node. At the same time, the query scope of different entities is divided. Farmers can view order progress, insurance claim status, and financing repayment plan. Financial institutions can view the basis for farmers' credit score calculation and the authenticity of insurance to assess loan risk. The government can view the recipients of subsidies and the reasons for claims. When accessing the data, corresponding data is pushed according to the identity of the recipient, ensuring the security and targeting of information sharing.

[0119] As an optional implementation, this embodiment also provides an electronic device, including: at least one processor, and a memory communicatively connected to the processor; wherein the memory stores instructions executable by the processor, the instructions being executed by the processor to enable the processor to execute the aforementioned blockchain-based order agriculture double insurance financing method.

[0120] As an optional implementation, this embodiment also provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the aforementioned blockchain-based order agriculture double-insurance financing method.

[0121] The beneficial effects of this invention are as follows:

[0122] (1) Differential privacy desensitization avoids the leakage of farmers' sensitive information. The design of blockchain and hash chain ensures that the full data cannot be tampered with after it is on the chain, eliminating the risk of farmers forging orders, overestimating income, and maliciously modifying data, and ensuring the authenticity of the assessment basis of financial institutions.

[0123] (2) The on-chaining of multi-source objective data solves the problems of data opacity and information asymmetry, enabling financial institutions to obtain complete data on farmers' credit, crop growth, and market conditions, and farmers to clearly understand the progress of financing and insurance, thus achieving information symmetry among multiple parties.

[0124] (3) The dual-insurance smart contract covers both natural disasters and price fluctuations, the two core risks of contract agriculture. Compared with the traditional single insurance model, it can reduce farmers' default rate due to risks and reduce the bad debt risk of financial institutions, thus improving the sustainability of the financing model.

[0125] (4) The automatic compliance verification and dynamic interest rate pricing of smart contracts replace the traditional manual review process, shortening the financing application cycle; electronic contracts, fund flow and claims records are all on the chain and combined with real-time government supervision, regulatory authorities can quickly verify the compliance of subsidy issuance and claims triggering, and financial institutions can also track loan risks in real time.

[0126] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0127] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A blockchain-based double-insurance financing method for order-based agriculture, characterized in that, include: Collect original farmer data from target farmers through target agricultural cooperatives; The original farmer data includes: basic order information and production support information; the basic order information includes: farmer identification, crop variety, agreed yield, contract purchase price, and delivery time; the production support information includes: family planting area, past performance records, and intended insurance. The farmer data is anonymized using a differential privacy method to obtain anonymized farmer data. Objective data are acquired using field sensors, satellite remote sensing, and regional agricultural product market APIs; the objective data includes: temperature and humidity, rainfall, crop growth status, regional spot prices, and regional futures prices. Based on the anonymized farmer data and the objective data, the farmer credit score and dynamic disaster threshold are calculated to obtain key parameters; the key parameters include: farmer credit rating and personalized disaster trigger threshold; The de-identified farmer data, the objective data, and the key parameters are integrated to obtain full data, a hash chain is constructed, and the full data is synchronized to preset blockchain nodes according to the hash chain; the hash chain includes: farmer order hash value and cooperative-level hash value; A natural disaster insurance contract and a price fluctuation insurance contract are set up, and the natural disaster insurance contract and the price fluctuation insurance contract are converted into smart contracts and uploaded to the blockchain; the natural disaster insurance contract includes: a personalized disaster trigger threshold, an agreed insurance coefficient, and a claims processing time; the price fluctuation insurance contract includes: a futures-spot linkage deviation rate, a fluctuation threshold, and an insurance coefficient; The smart contract is verified for integrity. After the verification is successful, a contract hash value is generated based on the smart contract. The contract hash value is then associated with and stored with the farmer's order hash value. Application materials are generated through the blockchain; the application materials include: basic materials and auxiliary materials; the basic materials include: the hash chain and the contract hash value; the auxiliary materials include: the crop growth status, the regional spot price, and the farmer's estimated repayment ability; The smart contract is used to verify the compliance of the application materials. After the verification is passed, the interest rate is dynamically priced using a preset interest rate formula to obtain the final interest rate. The electronic financing contract is signed using the blockchain, and the flow of funds is recorded and uploaded to the blockchain to generate a hash value for the financing funds. The electronic financing contract includes: the agreed loan amount, repayment period, and repayment method. During the operation of the blockchain, smart contracts are used to control the triggering and claims settlement of dual insurance based on the full amount of data, and the blockchain is monitored in real time for compliance and traced throughout its entire lifecycle through government regulatory nodes.

2. The blockchain-based double-insurance financing method for order agriculture according to claim 1, characterized in that, During the operation of the blockchain, smart contracts are used to control the triggering and claims processing of dual insurance based on the full amount of data. Furthermore, government regulatory nodes conduct real-time compliance monitoring and full lifecycle traceability of the blockchain, including: When the blockchain detects that the target meteorological data exceeds the personalized disaster trigger threshold, the natural disaster insurance contract is triggered. The disaster loss rate was determined based on the aforementioned objective data; Based on the disaster loss rate, a first automatic claim amount is generated using a preset first claim amount formula. The claim amount is then transferred to the farmer's account, and the claim record is uploaded to the blockchain.

3. The blockchain-based double-insurance financing method for order agriculture according to claim 1, characterized in that, During the operation of the blockchain, smart contracts are used to control the triggering and claims processing of dual insurance based on the full amount of data. Furthermore, government regulatory nodes conduct real-time compliance monitoring and full lifecycle traceability of the blockchain, including: The deviation rate between the spot price and the futures price in the region is calculated to obtain the futures-spot linkage deviation rate. When the futures-spot linkage deviation rate exceeds the volatility threshold, the price volatility insurance contract is triggered. A second automatic claim amount is generated using a preset second claim amount formula based on the regional spot price, the regional futures price, and the insurance coefficient. The claim amount is then transferred to the farmer's account based on the second automatic claim amount, and the claim record is uploaded to the blockchain.

4. The blockchain-based double-insurance financing method for order agriculture according to claim 1, characterized in that, During the operation of the blockchain, smart contracts are used to control the triggering and claims processing of dual insurance based on the full amount of data. Furthermore, government regulatory nodes conduct real-time compliance monitoring and full lifecycle traceability of the blockchain, including: Set the compliant range for contracted pricing, the time for subsidy payments to be received, and the range of constraints for financing interest rates; When the on-chain data of the blockchain does not comply with any of the following: the agreed pricing compliance range, the subsidy arrival time, or the financing interest rate constraint range, a compliance warning is triggered and the compliance warning is sent to the government regulatory node. Define the query scope; the query scope includes: the scope of farmers' viewing, the scope of financial institutions' viewing, and the scope of government viewing; the scope of farmers' viewing includes: order progress, insurance claim status, and financing repayment plan; the scope of financial institutions' viewing includes: the basis for calculating farmers' credit scores, the authenticity of insurance coverage, and assessment of loan risk; the scope of government viewing includes: subsidy recipients and the reasons for claim triggers. Identify the access object, determine the viewing scope of the access object based on the query scope, and send the target viewing data to the node corresponding to the access object when the access object accesses the blockchain.

5. The blockchain-based double-insurance financing method for order agriculture according to claim 1, characterized in that, The expression for the farmer's credit score is: ;in, Assign credit scores to farmers; , , These are respectively the weighting of the performance rate, the compliance rate, and the insurance coverage rate; Historical contract fulfillment rate; For data compliance rate; For insurance coverage rate.

6. The blockchain-based double-insurance financing method for order agriculture according to claim 1, characterized in that, The expression for the dynamic disaster threshold is: ;in, The personalized disaster trigger threshold; The basic disaster threshold for crops; , , These are respectively the climate weighting coefficient, the crop disaster resistance weighting coefficient, and the historical risk weighting coefficient; As an indicator of regional climate variability; For crop varieties' disaster resistance indicators; The frequency of historical disasters in the region.

7. The blockchain-based double-insurance financing method for order agriculture according to claim 1, characterized in that, The expression for the hash value of the farmer's order is: ;in, The hash value of the farmer's order; It is a hash encryption algorithm; Identify the farmers mentioned above; The agreed output; The contract purchase price; The order's basic information is uploaded to the blockchain using a timestamp. The expression for the cooperative-level hash value is: ;in, The cooperative-level hash value; This refers to the aggregated hash value from the previous round of the cooperative's data collection. Aggregate timestamps for cooperatives; This represents the total number of farmers within the cooperative.

8. A blockchain-based double-insurance financing method for order agriculture, as described in claim 1, is characterized in that... The expression for the futures-spot linkage deviation rate is: ;in, The aforementioned futures-spot linkage deviation rate; Real-time prices in the futures market; The contract purchase price; Real-time prices for regional agricultural products in the spot market.

9. An electronic device, characterized in that, include: At least one processor, and a memory communicatively connected to the processor; wherein the memory stores instructions executable by the processor, the instructions being executed by the processor to enable the processor to perform a blockchain-based order agriculture double-insurance financing method according to any one of claims 1 to 8.

10. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are used to cause the computer to execute any one of claims 1 to 8, a blockchain-based double-insurance financing method for order agriculture.

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