CN112348679A - Asset issuance and redemption method and system based on block chain - Google Patents
Asset issuance and redemption method and system based on block chain Download PDFInfo
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Abstract
The invention discloses an asset issuing and redeeming method and system based on a block chain, belonging to the technical field of the block chain, aiming at solving the technical problem of how to realize the asset issuing and redeeming by using the block chain, and adopting the technical scheme as follows: the method comprises the following specific steps: the block chain anchor determines that the off-chain assets of a specific amount are in a frozen state; a block chain anchor distributes block chain assets on a block chain; a blockchain account book of a blockchain anchor on a blockchain distributes transaction records of blockchain assets; the blockchain anchor receives a redemption request for the particular blockchain asset from a blockchain member; determining whether a frozen certificate corresponding to a particular blockchain asset exists in a blockchain ledger: if not, the redemption request is rejected; if yes, the blockchain anchor converts the specific blockchain asset into a corresponding amount of the down-chain asset, and provides the down-chain asset to the blockchain member.
Description
Technical Field
The invention relates to the technical field of block chains, in particular to an asset issuing and redemption method and system based on block chains.
Background
A blockchain may include several blockchain nodes, which may include a blockchain member (referred to simply as a member) and an anchor. The anchor is configured to anchor the down-chain assets and the blockchain assets, the down-chain assets can be distributed as blockchain assets through the blockchain, efficient and reliable on-chain asset transfer and the like can be achieved, and the blockchain assets can be converted into down-chain assets, off-line asset transfer and the like can be achieved.
Therefore, how to realize the issuance and redemption of the assets by using the block chain is a technical problem to be solved urgently.
Disclosure of Invention
The technical task of the invention is to provide an asset issuing and redemption method and system based on block chains, which solve the problem of how to realize the issuing and redemption of assets by using the block chains.
The technical task of the invention is realized in the following way, namely a block chain-based asset issuing and redemption method, which comprises the following steps:
in a first aspect, a method for issuing a blockchain asset is provided, which includes:
the block chain anchor determines that the off-chain assets of a specific amount are in a frozen state;
a block chain anchor distributes block chain assets on a block chain;
a blockchain account book of a blockchain anchor on a blockchain distributes transaction records of blockchain assets;
in a second aspect, a method for redeeming a blockchain asset is provided, which comprises:
the blockchain anchor receives a redemption request for the particular blockchain asset from a blockchain member;
determining whether a frozen certificate corresponding to a particular blockchain asset exists in a blockchain ledger:
if not, the redemption request is rejected;
if yes, the blockchain anchor converts the specific blockchain asset into a corresponding amount of the down-chain asset, and provides the down-chain asset to the blockchain member.
Preferably, the amount of the blockchain asset does not exceed a specified amount, and the transaction record for the blockchain asset in the blockchain ledger includes a freeze certificate for the blockchain asset indicating that the blockchain asset is supported by the blockchain asset that has been determined to be in a frozen state.
Preferably, the blockchain anchor is configured to anchor blockchain assets and down-chain assets, the down-chain assets being converted to equivalent blockchain assets by using the anchor or converting blockchain assets to equivalent down-chain assets by using the anchor, a one-to-one mapping between blockchain assets and down-chain assets;
when the down-link assets are in the preset account, the block chain anchor determines whether the preset account is in a frozen state or not by inquiring the operation authority of accessing the preset account, wherein the frozen state refers to that the corresponding off-link assets are isolated and protected, and different freezing degrees are used according to different requirements; wherein the predetermined account is an account designated by another blockchain node or another type of account;
preferably, the blockchain anchor exchanges blockchain assets for down-chain assets, and the blockchain anchor point further exchanges blockchain assets with the remaining blockchain nodes or exchanges blockchain assets for corresponding down-chain assets with another anchor point at which the blockchain asset was previously issued.
Preferably, the frozen certificate includes a signature of an anchor point of a trusted third party or a distribution blockchain asset, as follows:
freezing the query whether another anchor point or another anchor point is trusted when another anchor point signed by a third party outside the blockchain is trusted;
when the under-chain assets are confirmed to be still in the frozen state, the blockchain anchor converts the corresponding blockchain assets;
when the under-chain assets are not confirmed to be still in the frozen state, the block chain anchor refuses to convert the assets;
when the down-chain asset (i.e., frozen asset) corresponding to the frozen certificate is frozen by the blockchain anchor, the blockchain anchor unfreezes the frozen asset corresponding to the frozen certificate in order to exchange the blockchain asset with the down-chain asset; wherein the thawed asset is transferred to an asset storage location designated by the blockchain member.
Preferably, the blockchain anchor verifies the issuer of the blockchain asset and the holder of the blockchain asset as follows:
when the issuer of the blockchain asset is the blockchain anchor point and the blockchain member is the holder of the blockchain asset, the blockchain anchor converts the blockchain asset with the corresponding frozen certificate to an off-chain asset;
otherwise (e.g., the issuer of the blockchain asset is not the blockchain anchor, or the blockchain member is not the holder of the blockchain asset), the blockchain anchor refuses to complete redemption even if the blockchain asset has a frozen certificate.
Preferably, upon redemption, the blockchain anchor transfers the blockchain asset to a verified specific account, with both transfer-in and transfer-out rights, and has access to the verified specific account.
A blockchain-based asset issuance and redemption system, the system comprising,
the system comprises a plurality of devices which are connected with each other,
a determining unit for determining that the under-chain assets of the specific money amount are in the frozen state by the blockchain anchor;
an issue unit for anchoring blockchain assets on a blockchain by a blockchain; the amount of the blockchain assets does not exceed the designated amount, and the transaction records of the blockchain assets in the blockchain account book contain the frozen certificates of the assets under the chain;
a generating unit, configured to generate a freeze certificate by blockchain anchoring after the blockchain anchoring of the freeze-under-blockchain asset;
a receiving unit for receiving a redemption request for a blockchain asset initiated by a blockchain member through blockchain anchoring;
an acquisition unit configured to determine, by blockchain anchoring, whether there is a frozen certificate corresponding to a blockchain asset based on ledger data in a blockchain ledger;
a redemption unit for converting the blockchain asset into a corresponding amount of the linked asset through the blockchain anchor to provide the linked asset to the blockchain member when the frozen certificate corresponding to the blockchain asset exists; the block chain anchor is also used for unfreezing the frozen asset corresponding to the frozen certificate so as to use the asset as an off-chain asset, and transferring the off-chain asset to an asset storage position designated by a member of the block chain; or using another asset by the blockchain anchor as a downlinked asset; wherein the other asset is different from the frozen asset corresponding to the frozen certificate; also for redemption by the blockchain anchor of a blockchain asset having a corresponding frozen certificate when the issuer of the blockchain asset is the blockchain anchor point and the blockchain members are holders of the blockchain asset;
a verification unit to verify an issuer of the blockchain asset and a holder of the blockchain asset through the blockchain anchor;
a transfer unit to transfer, by the blockchain anchor, the blockchain asset to the underwriting-specific account upon completion of redemption.
An electronic device, comprising: a memory and at least one processor;
wherein the memory has stored thereon a computer program;
the at least one processor executes the memory-stored computer program to cause the at least one processor to perform the blockchain-based asset issuance and redemption method as described above.
A computer readable storage medium having stored thereon a computer program executable by a processor to implement a blockchain based asset distribution and redemption method as described above.
The block chain based asset issuance and redemption method and system of the present invention have the following advantages: according to the invention, the block chain anchoring is adopted to determine that the under-chain assets with specific money are in a frozen state and the block chain anchoring is adopted to issue the block chain assets on the block chain, so that the issue of the block chain assets is realized; and receiving a block chain asset redemption request initiated by a block chain member through the block chain anchor, determining through a block chain anchor point, according to the ledger data in the block chain ledger, whether a frozen certificate corresponding to the block chain asset exists, and converting the block chain asset into an under-chain asset with a corresponding amount through the block chain anchor when the frozen certificate corresponding to the block chain asset exists, so as to provide the under-chain asset to the block chain member, thereby realizing the redemption of the block chain asset.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a block flow diagram of an implemented method of blockchain asset issuance;
FIG. 2 is a block flow diagram of a block-chain asset redemption method;
FIG. 3 is a schematic diagram of a blockchain asset issuance scenario;
FIG. 4 is a schematic diagram of a frozen credential generation process;
FIG. 5 is a schematic diagram of a block-chain asset redemption scenario;
FIG. 6 is a schematic diagram of redemption of a blockchain asset in place of another anchor in accordance with an exemplary embodiment;
FIG. 7 is a schematic diagram of a blockchain asset issuing device;
FIG. 8 is a block diagram of a system for block chain asset delivery;
FIG. 9 is a schematic block diagram of an apparatus according to an example implementation;
FIG. 10 is a block diagram of the architecture of a block-chain asset redemption system;
FIG. 11 is a block flow diagram of a computer-implemented method for supporting blockchain assets published on a blockchain in accordance with an implementation of the present invention.
Detailed Description
The blockchain-based asset distribution and redemption methods and systems of the present invention are described in detail below with reference to the drawing figures and the detailed description of the invention.
Example 1:
as shown in fig. 1, the block chain-based asset distribution method of the present invention comprises the steps of:
step 102: the blockchain anchor value determines that the under-chain assets for a particular dollar amount are in a frozen state. Blockchain members may be financial institutions or other forms of organizations or platforms that support asset transfer services. The role of the anchor may also be played by a financial institution or other form of organization or platform that supports asset transfer services.
An off-link asset may be a fund or a security. The down-link asset may be in a predetermined account and the predetermined account is in a frozen state. Thus, the down-link asset is in a frozen state. In other words, the blockchain anchor may determine whether the predetermined account is in the frozen state by querying the operational authority to access the predetermined account.
The frozen state indicates that the corresponding off-chain asset cannot be used by other services and is isolated and protected from other factors. Different degrees of freezing are used according to different needs. For example, where the degree of freezing is relatively strong, a bankruptcy clearing isolation may be performed on the off-chain assets. Thus, even if the anchor point freezing the down-chain asset is bankrupt, the frozen state of the down-chain asset is unaffected.
In a practical scenario, the predetermined account may be a frozen asset specific account designated by the blockchain anchor. That is, the account is only used to store the down-link assets that need to be frozen. For example, the predetermined account may be an account opened at a bank by a blockchain anchor. In other scenarios, the predetermined account may be an account specified by another blockchain node or another type of account. The method is not directed to a specific scenario.
In an example, the type of the down-link asset may be a real asset, and this type of down-link asset may be located at a predetermined storage location. By using the information collecting means, it is possible to collect object information at a predetermined storage location. In this way, when the information collecting means collects information on the under-link asset at a predetermined storage location, it can be determined that the under-link asset is in the frozen state. For example, the information collecting means may include an image collecting means, and the image collecting means may collect images at predetermined storage locations. In this way, when it is determined through the image content analysis that the image includes an off-chain asset, it can be determined that the information collecting means collects information on the off-chain asset at a predetermined storage location. For example, the information collecting device may include an RFID reader, and each object at a predetermined storage location has an RFID tag, and the RFID reader may read the RFID tag at the predetermined storage location. Therefore, when the RFID tag information corresponding to the under-link asset is read, it can be determined that the information collecting apparatus has collected the information on the under-link asset at the predetermined storage location.
Step 104: the blockchain anchor publishes blockchain assets on the blockchain, wherein the amount of money of the blockchain assets does not exceed a specified amount of money, and the transaction records of the blockchain assets in the blockchain ledger include frozen certificates of the down-chain assets.
In individual scenarios, a blockchain asset published by a blockchain anchor point on a blockchain may be of the same type as the corresponding sub-chain asset. For example, when the under-link asset is Renminbi, the issued blockchain asset is also Renminbi; when the under-link asset is dollars, the block-link asset that is issued is also dollars. As another example, when the down-link asset is a security, the block-link asset issued is also a security; when the down-link asset is not real, the published blockchain asset is also real.
In individual scenarios, the blockchain assets and corresponding down-chain assets published on the blockchain by the blockchain anchor point may be of different types. For example, a down-link asset may be a good and a block-link asset issued is an equivalent security. As another example, the down-chain asset may be US dollars, and the issued blockchain asset is an equivalent blockchain token.
In individual scenarios, blockchain anchors are configured to anchor blockchain assets and off-chain assets, such that an off-chain asset can be converted to an equivalent blockchain asset by using anchors, or a blockchain asset can be converted to an equivalent off-chain asset by using anchors. Therefore, a one-to-one mapping between blockchain assets and downlinked assets needs to be implemented. For example, a blockchain member may store assets under the chain at an anchor, obtain and hold the corresponding blockchain assets published on the blockchain by the anchor. Further, the blockchain members can mutually transfer the blockchain assets held by the blockchain members, and can register the holding status and the holder change status of the blockchain assets issued by the blockchain members to the anchor in the blockchain ledger of the blockchain, thereby collectively managing the blockchain assets.
In individual scenarios, a frozen certificate is added to the transaction record corresponding to the blockchain asset, such that the frozen certificate can be used to prove the reliability of the blockchain anchor and indicate that the blockchain anchor can convert the related blockchain asset into a down-chain asset. Thus, the associative relationship between blockchain assets and the down-chain assets can ensure that blockchain assets have a true value, rather than being randomly published by the blockchain anchor. The blockchain anchor may actively generate a freeze certificate after freezing the under-chain asset. For example, the blockchain anchor signs the frozen certificate generated by the blockchain anchor point and adds the frozen certificate to the transaction record. The blockchain anchor may receive a frozen certificate from a trusted third party. That is, the frozen certificate may be signed by a trusted third party and then provided to the blockchain anchor point. For example, a trusted third party may freeze an under-chain asset, generate and sign a frozen certificate. For another example, after the blockchain anchors the asset under the freeze chain and generates the freeze certificate, the trusted third party signs the freeze certificate after confirming the freeze state to prove that the asset under the chain is indeed in the freeze state.
Example 2:
as shown in fig. 2, a block-chain based asset redemption method includes the steps of:
step 202: the blockchain anchor receives a blockchain asset redemption request initiated by a blockchain member.
Blockchain members may specifically initiate requests to convert blockchain assets to corresponding down-chain assets. In other scenarios, a blockchain member may perform related operations during an asset transfer (e.g., money transfer) equivalent to initiating a request to transfer a blockchain asset, particularly when the blockchain asset of the blockchain member is transferred to an asset under a chain.
Step 204: blockchain anchoring determines whether a frozen certificate corresponding to a blockchain asset exists based on ledger data in the blockchain ledger.
Step 206: when there is a frozen certificate corresponding to a blockchain asset, the blockchain anchor converts the blockchain asset to a corresponding dollar amount of the down-link asset, which is provided to the blockchain member.
In certain scenarios, a blockchain asset may be published by a previous blockchain anchor, in which scenario the blockchain asset is still converted to a corresponding off-chain asset by the blockchain anchor. A blockchain asset may be all or part of an asset issued by a blockchain anchor, and thus the blockchain anchor may convert the blockchain asset to all or part of the corresponding off-chain asset as the case may be.
In certain scenarios, the transaction records corresponding to the blockchain assets may be searched for frozen certificates. When the transaction record contains a frozen certificate, it is determined that there is a frozen certificate corresponding to the blockchain asset. Thus, the effective value of a blockchain asset can be verified by using the corresponding down-chain asset of the frozen certificate to reduce the risk that redemption may be associated with. In addition, other methods may also be used to verify whether a frozen certificate corresponding to a blockchain asset exists. The method does not limit the implementation. In particular, the blockchain asset may be issued by another anchor and the frozen certificate of the blockchain asset verified. After verification is successful, the blockchain assets exchange corresponding down-chain assets with blockchain members. This corresponds to the following case: the blockchain anchor exchanges blockchain assets for down-chain assets, and the blockchain anchor point can further exchange blockchain assets with other blockchain nodes or exchange blockchain assets with another anchor point that previously published blockchain assets for a corresponding down-chain asset.
In certain scenarios, the frozen certificate may include a signature of a trusted third party or an anchor point (e.g., a blockchain anchor point or another anchor point before) at which the blockchain asset was issued. For example, a frozen certificate may be generated and signed by the blockchain anchor when the under-chain asset is frozen by the blockchain anchor, or provided to the trusted third party by the blockchain anchor, and the trusted third party signs the third party to which the frozen certificate is trusted after confirming the frozen state of the under-chain asset. For example, when an asset is frozen by a previous anchor, another anchor may generate and sign a frozen certificate, or another anchor may provide a frozen certificate to a trusted third party, who signs the frozen certificate after confirming that the asset is frozen down the chain.
When another anchor point that a third party signs outside the blockchain is trusted, the query of whether the other anchor point or the other anchor point is trusted may be frozen. When the under-chain assets are confirmed to be still in the frozen state, the blockchain anchor will transform the corresponding blockchain assets. Otherwise, the blockchain anchor may refuse to transform the asset.
In certain scenarios, when the down-chain asset (i.e., frozen asset) to which the frozen certificate corresponds is frozen by the blockchain anchor, the blockchain anchor may unfreeze the frozen asset to which the frozen certificate corresponds in order to exchange the blockchain asset with the down-chain asset. The thawed asset may then be transferred to an asset storage location designated by the blockchain member. For example, when an asset is a fund, the asset storage location may be an account designated by a member of the blockchain; as another example, when the asset is a commodity, the asset storage location may be a warehouse designated by a member of the blockchain.
In certain scenarios, whether or not a frozen asset is frozen by the blockchain anchor, the blockchain anchor may swap the blockchain asset for other assets, and the other assets are different from the frozen asset corresponding to the frozen certificate.
In a particular scenario, a blockchain anchor may verify the issuer of the blockchain asset and the holder of the blockchain asset. When the issuer of the blockchain asset is the blockchain anchor point and the blockchain member is the holder of the blockchain asset, the blockchain anchor converts the blockchain asset with the corresponding frozen certificate to a down-chain asset. Otherwise (e.g., the issuer of the blockchain asset is not the blockchain anchor, or the blockchain member is not the holder of the blockchain asset), the blockchain anchor can refuse to complete redemption even if the blockchain asset has a frozen certificate.
In certain scenarios, upon completion of redemption, the blockchain anchor may transfer the blockchain asset to a underwriting specific account. And the specific account verified and cancelled can be accessed with the transfer-in authority and the transfer-out authority. Thus, the transformed blockchain asset is logged out to prevent the same blockchain asset from being transformed multiple times.
Example 3:
for ease of understanding, the technical solution of the present method is described below by using an example of publishing and converting blockchain assets, as shown in fig. 3, assuming that a third party payment platform operates a digital wallet a (abbreviated as wallet a), wallet a being a member on the blockchain, which also includes an anchor B, wallet a can obtain the blockchain assets published by anchor B using the technical solution of the present method.
Suppose wallet a wants to obtain 1000-dollar blockchain assets issued by anchor B, i.e., anchor B issues to wallet a blockchain asset that can be 1000-dollar funds or another 1000-dollar worth asset. The asset may be selected or set by wallet a. For ease of description, the blockchain assets are hereinafter represented as funds in 1000 yuan.
Anchor B may publish a 1000-tuple blockchain asset to wallet a by the following steps.
Step 1: wallet a transfers 1000 yuan to the main anchor B.
Wallet a and anchor B open an account at bank C, respectively, e.g., as shown in fig. 3, account 1 belongs to wallet a, account 2 and account 3 belong to anchor B, so wallet a can trigger account 1 to transfer 1000 dollars to account 2 or account 3.
Anchor B may agree in advance that it is desirable for the subject that issued the blockchain asset at anchor B to transfer the corresponding off-chain funds to the designated account. For example, the account may be Account 2 of C Bank or another designated account. Thus, wallet a may transfer 1000 yuan from account 1 to account 2. Of course, wallet a may also transfer 1000 yuan from account 1 to account 3 and notify anchor B through a predetermined path, thereby causing anchor B to transfer the funds of 1000 yuan from account 3 to account 2.
During the transfer, wallet a may indicate in the transfer remark the member ID and deposit instructions for wallet a on the blockchain. After receiving the transfer remarks, the anchor B can determine that the a-wallet needs to issue 1000 yuan of money transferred as the block chain fund by analyzing the member ID and the deposit instruction.
In a particular scenario, assume account 1 has an initial fund of 1000 yuan, account 2 has an initial fund of 8000 yuan, and account 3 has an initial fund of 2000 yuan. after the a-wallet transfers 1000 yuan to anchor B, the surplus fund of account 1 is 0 yuan, the surplus fund of account 2 is 9000 yuan, and the surplus fund of account 3 is 2000 yuan, as shown in FIG. 4.
Step 2: anchor B freezes funds transferred by wallet a and generates a frozen voucher.
In a particular scenario, account 2 may be a frozen fund-specific account set for anchor B, so the 1000 yuan moneys offered by wallet a are frozen in account 2. Similarly, funds transferred for other objects to issue blockchain assets may also be frozen in account 2 to collectively manage funds of similar use. Of course, anchor B need not necessarily have a frozen fund-specific account, and may freeze all or part of the funds in the same account.
To improve the trustworthiness of the frozen certificate, anchor B may cooperate with a trusted third party (e.g., an authority or regulatory authority) that signs the frozen certificate after the trusted third party confirms that anchor B performs the freezing operation.
And 3, the anchor point B issues the assets on the blockchain and adds the frozen certificate to the transaction records corresponding to the assets in the blockchain ledger. The asset issuance operation performed by anchor B on the blockchain may form a corresponding transaction record in the blockchain ledger to prove that the asset is authentic and valid.
The frozen certificate is added to a transaction record corresponding to the asset. Thus, after acquiring an asset, a blockchain link point may query the corresponding transaction record in a blockchain ledger to obtain a frozen certificate contained in the transaction record, thereby determining that the asset has a corresponding down-link asset as a guarantee and proving that the asset does have a corresponding value and is not randomly issued.
And 4, step 4: anchor B records the issued blockchain asset as a blockchain balance held by wallet a.
In a particular scenario, assume that initially only wallet D and bank E hold blockchain assets issued by anchor B. For example, as shown in FIG. 3, wallet D holds 2000 RMB, and bank E holds 5000 RMB. If wallet a holds a previously issued blockchain asset, wallet a holds 1000 yuan, in addition to wallet D and bank E, issued by anchor B, as shown in fig. 4.
For example, wallet a holds 1000 yuan monetization funds issued by anchor B, and it is noted that "1000" shown in fig. 4 is only one digit in the blockchain ledger, created and registered by anchor B for wallet a, and that this digit of "1000" may actually represent "1000 yuan" only when anchor B is able to convert the digit "1000" to 1000 yuan for the property under the chain. Therefore, a frozen certificate is added in step 3 to demonstrate that anchor B can convert the number "1000" to a 1000-tuple under-chain asset. Thus, it indicates that the number "1000" can indeed represent "1000 yuan.
As shown in fig. 5, assuming wallet a holds a 1000-dollar blockchain asset issued by anchor B, the asset is converted to 1000 dollars down the chain as follows.
Step 1: wallet a initiates a redemption request to anchor B by using a bridge module between wallet a and the blockchain.
Step 2: anchor B may determine a transaction record corresponding to the blockchain asset to be converted and check whether the transaction record contains a frozen certificate.
And step 3: anchor B subtracts 1000 dollars from blockchain assets held by wallet a and issued by B Anchor, and transfers from C Bank Anchor B Account 2 or Account 3 to wallet a Account 1.
As shown in fig. 6, assume that wallet a holds 1000-dollars of blockchain assets that were issued by anchor G, but for some reason wallet a wants to redeem blockchain assets at anchor B. Anchor B may determine that the blockchain asset was issued by anchor G by using the transaction record for the blockchain asset in the blockchain ledger. If anchor G or a trusted third party signed frozen certificate is in the transaction record, indicating that anchor G frozen a link-down asset of equal or greater dollar amount when issuing the blockchain asset, anchor B can determine that the blockchain asset is authentic and valid. Of course, anchor B may also temporarily initiate a query to anchor G to determine if the associated off-chain asset is still frozen enough to redeem the blockchain asset. When the anchor point G returns confirmation of the frozen state to the anchor point B, the anchor point B can determine that the associated under-chain asset is still in the frozen state, sufficient to redeem the block-chain asset.
Thus, anchor B may reserve the relevant blockchain assets and may transfer the blockchain assets of wallet a to the blockchain account of anchor B and transfer 1000 dollars from account 2 or account 3 to account 1 corresponding to wallet a, and then anchor B may transfer the blockchain assets to anchor G, which transfers the 1000 dollars of the down-chain assets to the down-anchor B account for redemption completion.
Example 4:
as shown in fig. 7, the apparatus includes, in terms of hardware, a processor 702, an internal bus 704, a network interface 706, a memory 708, and a nonvolatile memory 710, and may of course further include hardware required for other services. The processor 702 reads the corresponding computer program from the non-volatile memory 710 into the memory 708 and then runs the corresponding computer program, thereby logically forming a blockchain asset issuing device. Of course, one or more implementations of the present specification do not preclude another implementation, such as a logic device or a combination of hardware and software, in addition to a software implementation. That is, the execution subject of the following processing is not limited to each logic unit, and may be hardware or a logic device.
As shown in fig. 8, in a software implementation, a blockchain asset issuing system may include: a determining unit 801 configured to determine that a certain number of the under-chain assets are in a frozen state by block chain anchoring; and an issuing unit 802 configured to issue by blockchain anchoring, blockchain assets on a blockchain, wherein the amount of the blockchain asset does not exceed a specified amount, and a transaction record of the blockchain asset in a blockchain ledger includes a frozen certificate of the down-chain asset. The apparatus further comprises a generating unit 803 or a receiving unit 804. The generation unit 803 is configured to generate a freeze certificate by blockchain anchoring after blockchain anchoring the freeze-under-chain asset. The receiving unit 804 is configured to receive a freeze certificate from a trusted third party through a blockchain anchor, wherein the trusted third party freezes an under-chain asset.
Example 5:
as shown in fig. 9, the apparatus includes, in terms of hardware, a processor 902, an internal bus 904, a network interface 906, a memory 908, and a nonvolatile memory 910, and may of course further include hardware necessary for other services. The processor 902 reads the corresponding computer program from the non-volatile memory 910 into the memory 908 and then runs the corresponding computer program, thereby logically forming a block-chain asset redemption apparatus. Of course, one or more implementations of the present specification do not preclude another implementation, such as a logic device or a combination of hardware and software, in addition to a software implementation. That is, the execution subject of the following processing is not limited to each logic unit, and may be hardware or a logic device.
As shown in FIG. 10, in a software implementation, a block-chain asset redemption system can include: a receiving unit 1001 configured to receive a redemption request for a blockchain asset initiated by a blockchain member through blockchain anchoring; an obtaining unit 1002 configured to determine, by blockchain anchoring, whether there is a frozen certificate corresponding to a blockchain asset based on ledger data in a blockchain ledger; and a redemption unit 1003 configured to convert the blockchain asset into an under-chain asset of a corresponding amount through the blockchain anchor to provide the under-chain asset to the blockchain member when there is a frozen certificate corresponding to the blockchain asset. Redemption unit 1003 is configured to unfreeze the frozen asset corresponding to the frozen certificate through the blockchain anchor to use the asset as an under-chain asset and transfer the under-chain asset to the asset storage location specified by the blockchain member; or by a blockchain anchor, another asset acting as a down-chain asset, where the other asset is different from the frozen asset corresponding to the frozen certificate. The device also comprises the following parts: verification unit 1004 configured to verify an issuer of the blockchain asset and a holder of the blockchain asset through the blockchain anchor. Redemption unit 1003 is configured to redeem a blockchain asset with a corresponding frozen certificate by a blockchain anchor when the issuer of the blockchain asset is the blockchain anchor point and the blockchain members are holders of the blockchain asset. The device also comprises the following parts: a transfer unit 1005 configured to transfer, by the blockchain anchor, the blockchain asset to the underwriting specific account upon completion of redemption. And the specific account verified and cancelled can be accessed with the transfer-in authority and the transfer-out authority.
The systems, devices, modules or units shown in the previous examples may be implemented using computer chips or entities or may be implemented using products with specific functions. A typical implementation device is a computer, and the computer may be a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email receiving and sending device, a game console, a tablet, a wearable device, or any combination thereof.
The memory may include non-persistent memory, Random Access Memory (RAM), non-volatile memory, and/or other forms of computer-readable media, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is but one type of computer-readable medium.
Computer-readable media include persistent, non-persistent, removable, and non-removable media that may use any method or technology to store information. The information may be computer readable instructions, data structures, program modules or other data. A computer storage medium includes, but is not limited to, a Parametric Random Access Memory (PRAM), a Static Random Access Memory (SRAM), a Dynamic Random Access Memory (DRAM), another type of Random Access Memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, a compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD) or other optical disc storage, magnetic tape, magnetic disk storage, quantum memory, a graphene storage medium, another magnetic storage device, or any other non-transmission medium. Computer storage media may be used to store information that is accessible by a computing device. By definition in this method, a computer readable medium does not include transitory computer readable media (transitory media) such as modulated data signals and carrier waves.
Specific implementations of the method are described above. Other implementations are within the scope of the following claims. In some cases, the actions or steps described in the claims can be performed in a different order than in the implementation and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require a particular order of execution to achieve desirable results.
Example 6:
for clarity, the following description generally describes the method 1100 based on the context of other figures of the method, as shown in fig. 11, the method 1100 may be performed by any system, environment, software, and hardware, or combination of systems, environments, software, and hardware as appropriate. In some implementations, the various steps of the method 1100 may be performed in parallel, combined, in a loop, or in any order.
At 1102, the blockchain anchor determines that an out-of-chain asset of a particular dollar amount is in a frozen state. As described above in connection with fig. 1-6, a blockchain anchor may be a blockchain member, financial institution, or other form of organization or platform that supports asset transfer services. The down-link assets may be funds, securities, or real assets (which may have radio frequency identification tags). In some implementations, the off-chain asset may be located in a predetermined account with special access rights. Thus, the blockchain anchor may determine whether the predetermined account is in a frozen state by querying operational rights to access the predetermined account. In the case of real assets, the off-chain assets may be located in predetermined storage locations. By using the information collecting device, information collection can be performed on an object at a predetermined storage location. In this way, the under-chain asset can be in a frozen state when the information collection device collects information about the under-chain asset at a predetermined storage location. When an under-chain asset is unavailable to other services on the blockchain and therefore becomes orphaned, the under-chain asset is in a frozen state. For example, frozen down-chain assets are isolated and protected from blockchain assets circulating on the blockchain.
At 1104, the blockchain anchor publishes blockchain assets on the blockchain. Blockchain assets may be evaluated within a certain amount of the asset under the chain in the frozen state. The distribution of blockchain assets allows blockchain assets to circulate through the blockchain for consumption by blockchain members.
At 1106, the blockchain anchor issues transaction records in a blockchain ledger on the blockchain. The transaction record includes a freeze certificate indicating that the issued blockchain asset is supported by the down-chain asset in a frozen state. In one example, a blockchain asset published by a blockchain anchor point on a blockchain may be of the same type as a corresponding down-chain asset. In another example, the blockchain assets and corresponding down-chain assets published on the blockchain by the blockchain anchor point may be of different types. Here, a frozen certificate may be added to the transaction record corresponding to the blockchain asset, such that the frozen certificate may be used to prove the reliability of the blockchain anchor point and indicate that the blockchain anchor may convert the associated blockchain asset to a down-chain asset. Thus, the associative relationship between blockchain assets and off-chain assets can support blockchain assets having a true value and not being randomly published by the blockchain anchor.
At 1108, the blockchain anchor receives a redemption request for the particular blockchain asset from the blockchain member. The redemption request may involve the desirability of submitting a blockchain member to convert a particular blockchain asset to an under-chain asset. For example, a submitting blockchain member may wish to redeem a particular blockchain asset from a token form to dollars.
At 1110, it is determined whether a frozen certificate corresponding to a particular blockchain asset exists in the blockchain ledger. To determine that a frozen certificate corresponding to a particular blockchain asset is present in the blockchain ledger (1112), the method 1100 proceeds to 1114 to convert the particular blockchain asset to a corresponding dollar amount of the down-chain asset. Otherwise, in response to determining that the frozen certificate corresponding to the particular blockchain asset is not present in the blockchain ledger, the method 1100 proceeds to 1116 to deny the redemption request.
The blockchain implementation described in the present approach may be dedicated to the down-chain assets to support circulation of blockchain assets issued by blockchain anchor points on the blockchain. The published blockchain assets are linked with the dedicated, down-chain assets by a blockchain technology implementation. Once frozen, the down-chain assets may be isolated from circulation on the blockchain. When a blockchain member holding a particular blockchain asset in circulation requests redemption of the particular blockchain asset, the frozen linked asset may be maintained in a predetermined account for redemption based on the corresponding frozen certificate. Thus, frozen certificates are used to support a particular blockchain asset, i.e., an under-chain asset, and may prove the true value of the particular blockchain asset. The frozen certificate is generated and signed by the blockchain anchor node (or by a trusted third party, such as a financial institution, which is then received and signed by the blockchain anchor node). The digital signature and linking implementation makes the frozen certificate tamper-free and transparent to all members on the blockchain.
The embodiments and operations described in the present methods may be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in the present methods, or in combinations of one or more of them. The operations may be implemented as operations performed by a data processing device on data stored on one or more computer-readable storage devices or received from other sources. A data processing apparatus, computer, or computing apparatus may include an apparatus, device, or machine for processing data, including for example, a programmable processor, a computer, a system on a chip, or multiple systems or combinations of the above. The apparatus can comprise special purpose logic circuitry, e.g., a Central Processing Unit (CPU), a Field Programmable Gate Array (FPGA), or an Application Specific Integrated Circuit (ASIC). The apparatus may also include code to create an execution environment for the computer program, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system (e.g., an operating system or a combination of operating systems), a cross-platform runtime environment, a virtual machine, or a combination of one or more virtual machines. The device and execution environment may implement a variety of different computing model infrastructures, such as web services, distributed computing and grid computing infrastructures.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A block chain based asset issuance and redemption method, the method comprising:
the block chain anchor determines that the off-chain assets of a specific amount are in a frozen state;
a block chain anchor distributes block chain assets on a block chain;
a blockchain account book of a blockchain anchor on a blockchain distributes transaction records of blockchain assets;
the blockchain anchor receives a redemption request for the particular blockchain asset from a blockchain member;
determining whether a frozen certificate corresponding to a particular blockchain asset exists in a blockchain ledger:
if not, the redemption request is rejected;
if yes, the blockchain anchor converts the specific blockchain asset into a corresponding amount of the down-chain asset, and provides the down-chain asset to the blockchain member.
2. The blockchain-based asset issuance and redemption method of claim 1, wherein the amount of the blockchain asset does not exceed a specified amount and the transaction record for the blockchain asset in the blockchain ledger includes a frozen certificate for the blockchain asset indicating that the blockchain asset is supported by the linked asset that has been determined to be in a frozen state.
3. The blockchain-based asset issuance and redemption method of claim 1, wherein the blockchain anchor is configured to anchor blockchain assets and under-chain assets, the under-chain assets being converted to equivalent blockchain assets using the anchor or being converted to equivalent under-chain assets using the anchor, a one-to-one mapping between blockchain assets and under-chain assets;
when the down-link assets are in the preset account, the block chain anchor determines whether the preset account is in a frozen state or not by inquiring the operation authority of accessing the preset account, wherein the frozen state refers to that the corresponding off-link assets are isolated and protected, and different freezing degrees are used according to different requirements; wherein the predetermined account is an account designated by another blockchain node or another type of account.
4. The blockchain-based asset issuance and redemption method of claim 1, wherein the blockchain anchor exchanges blockchain assets for under-chain assets, and the blockchain anchor point further exchanges blockchain assets with the remaining blockchain nodes or exchanges blockchain assets for corresponding under-chain assets with another anchor point of the previously issued blockchain asset.
5. The blockchain-based asset issuance and redemption method of claim 1, wherein the frozen certificate includes a signature of an anchor point of the trusted third party or the issuing blockchain asset as follows:
freezing the query whether another anchor point or another anchor point is trusted when another anchor point signed by a third party outside the blockchain is trusted;
when the under-chain assets are confirmed to be still in the frozen state, the blockchain anchor converts the corresponding blockchain assets;
when the under-chain assets are not confirmed to be still in the frozen state, the block chain anchor refuses to convert the assets;
when the down-chain asset corresponding to the frozen certificate is frozen by the blockchain anchor, the blockchain anchor unfreezes the frozen asset corresponding to the frozen certificate so as to exchange the blockchain asset with the down-chain asset; wherein the thawed asset is transferred to an asset storage location designated by the blockchain member.
6. The blockchain-based asset issuance and redemption method of claim 1, wherein the blockchain anchor verifies the issuer of the blockchain asset and the holder of the blockchain asset as follows:
when the issuer of the blockchain asset is the blockchain anchor point and the blockchain member is the holder of the blockchain asset, the blockchain anchor converts the blockchain asset with the corresponding frozen certificate to an off-chain asset;
otherwise, the blockchain anchor will refuse to complete redemption even if the blockchain asset has a frozen certificate.
7. The blockchain-based asset delivery and redemption method of any of claims 1-6, wherein upon redemption, the blockchain anchor transfers the blockchain asset to a verified and redeemed specific account with both transfer-in and transfer-out rights and access to the verified and redeemed specific account.
8. A blockchain-based asset issuance and redemption system, the system comprising,
a determining unit for determining that the under-chain assets of the specific money amount are in the frozen state by the blockchain anchor;
an issue unit for anchoring blockchain assets on a blockchain by a blockchain; the amount of the blockchain assets does not exceed the designated amount, and the transaction records of the blockchain assets in the blockchain account book contain the frozen certificates of the assets under the chain;
a generating unit, configured to generate a freeze certificate by blockchain anchoring after the blockchain anchoring of the freeze-under-blockchain asset;
a receiving unit for receiving a redemption request for a blockchain asset initiated by a blockchain member through blockchain anchoring;
an acquisition unit configured to determine, by blockchain anchoring, whether there is a frozen certificate corresponding to a blockchain asset based on ledger data in a blockchain ledger;
a redemption unit for converting the blockchain asset into a corresponding amount of the linked asset through the blockchain anchor to provide the linked asset to the blockchain member when the frozen certificate corresponding to the blockchain asset exists; the block chain anchor is also used for unfreezing the frozen asset corresponding to the frozen certificate so as to use the asset as an off-chain asset, and transferring the off-chain asset to an asset storage position designated by a member of the block chain; or using another asset by the blockchain anchor as a downlinked asset; wherein the other asset is different from the frozen asset corresponding to the frozen certificate; also for redemption by the blockchain anchor of a blockchain asset having a corresponding frozen certificate when the issuer of the blockchain asset is the blockchain anchor point and the blockchain members are holders of the blockchain asset;
a verification unit to verify an issuer of the blockchain asset and a holder of the blockchain asset through the blockchain anchor;
a transfer unit to transfer, by the blockchain anchor, the blockchain asset to the underwriting-specific account upon completion of redemption.
9. An electronic device, comprising: a memory and at least one processor;
wherein the memory has stored thereon a computer program;
the at least one processor executing the memory-stored computer program causes the at least one processor to perform the blockchain-based asset issuance and redemption method of any one of claims 1 to 7.
10. A computer readable storage medium having stored thereon a computer program executable by a processor to implement a blockchain based asset issuance and redemption method as claimed in claims 1 to 7.
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