JP6979736B2 - Token exchange method and blockchain system based on public chain - Google Patents

Description

(Mutual reference of related applications)
This application was submitted to the China National Intellectual Property Office on December 07, 2018, the application number is 2018114696915.0, and the title of the invention is "public chain-based token exchange method and blockchain system" in China. Claim the priority of the patent application, the entire contents of which are incorporated herein by reference.

The present application relates to the field of network transaction technology, and particularly to a token exchange method and a blockchain system based on a public chain.

Blockchain technology is a relatively objective non-repudiation digital environment created by decentralized system application architecture and public consensus. Based on the blockchain technology, the reliability of the network information can be ensured. For example, when one transaction occurs in the blockchain network, the node in the blockchain network describes the transaction content by the transaction information. Generates existing block data, broadcasts the block data throughout the network, and other nodes in the network store the block data at the same time, forming an immutable blockchain. Among them, the transaction has a broad meaning and does not refer to "buying and selling of goods" and "exchange of goods" in the traditional sense, but refers to a certain data operation content or operation result in a blockchain network. For example, when a blockchain node A in a network issues an inquiry request a regarding the performance of a communication device of a certain model number, the inquiry request a is one for the blockchain node B in charge of the inquiry service. It becomes a transaction. Similarly, transmitting the performance table b of the communication device of the model number obtained by the inquiry by the node B to the node A is also one transaction. The information A, a and the information B, b are written in the data block of the blockchain as transaction information.

Usually, in transactions in a blockchain network, digital tokens (token) such as bitcoin of Bitcoin network and Ether of Ethereum network are used to evaluate the transaction operation itself or to standardize the attention and value of transaction data. Is used as a marker for network transactions. Different blockchain networks typically use different types of tokens. Since it is necessary to exchange different types of tokens as markers for network transactions, the blockchain network A that uses the A token and the blockchain network B that uses the B token are via the A token and the B token. Realize the transmission of information or value between two blockchain networks.

The traditional token exchange operation is completed on the token exchange, i.e., providing a trading center on the network in the form of an exchange, where both parties involved in the exchange follow a constant exchange rate, quantity 1 A. It provides an exchange platform between different tokens so that a quantity of 2 B tokens can be exchanged with tokens.

In existing exchange methods, the exchange operation between the two types of tokens depends on the traditional exchange platform or third party platform, and the exchange rate is also dependent on the exchange platform or third party platform (eg UnionPay). Since the exchange platform or the third party platform is a substantially centralized platform, it is easily subject to cyber attacks and it is difficult to secure security. In addition, the conventional exchange platform needs to determine the exchange destination, and if the exchange target on the exchange side is an unpopular token, it takes a long time to find the exchange destination and determine the exchange rate between the tokens. Therefore, the exchange process takes a long time, and not only the exchange cannot be completed in a timely manner, but also more network resources are consumed and the exchange efficiency is lowered.

The present application provides a token exchange method and a blockchain system based on a public chain in order to solve the problem that the conventional token exchange method is controlled by a centralized program and the exchange efficiency is low.

In the first embodiment, the public chain-based token exchange method applied to the public chain network according to the present application is
A step of receiving a supply transaction originating from the supply chain, including the type of supply token transferred to the public chain and the quantity of the supply token.
A step to inquire about the supply amount of supply tokens in the public chain network and calculate the exchange rate between the supply token and the public chain token based on the supply amount of supply tokens.
The step of transferring public chain tokens equivalent to the quantity of supply tokens to the supply chain according to the exchange rate between supply tokens and public chain tokens,
The step of receiving an exchange transaction originating from the exchange chain, including the quantity of initial tokens transferred to the public chain and the type of exchange token,
The step of inquiring the supply amount of the initial token and the exchange token in the public chain network and calculating the exchange rate between the exchange token and the initial token by the supply amount,
Includes a step of transferring exchange tokens equivalent to the quantity of initial tokens to the exchange chain, depending on the exchange rate between the exchange tokens and the initial tokens.

Preferably, the step of querying the supply amount of the supply token in the public chain network and calculating the exchange rate between the supply token and the public chain token by the supply amount of the supply token is
A sub-step to receive a pledge token that includes a preset quantity of supply tokens transferred from the supply chain to the public chain and a public chain token transferred to the public chain at the same time.
A sub-step to calculate the initial exchange rate based on the quantitative relationship between the supply token and the public chain token in the received pledge token,
A sub-step that stores the initial exchange rate and adjusts the exchange rate in real time according to the transfer quantity of the subsequent supply token based on the initial exchange rate.
including.

Preferably, the method precedes the step of receiving a supply transaction originating from the supply chain.
The step of verifying the supply qualification of the supply token of the supply chain that accessed the public chain network by the quantity of public chain tokens owned by the supply chain,
If the quantity of public chain tokens owned by the supply chain is greater than or equal to the verification threshold, the supply chain is determined to be eligible for supply, and the steps to receive supply transactions originating from the supply chain,
If the quantity of public chain tokens owned by the supply chain is less than the verification threshold, it is determined that the supply chain is not eligible for supply, a verification prompt is sent to the supply chain, and the type of supply token that the supply chain can provide. And the steps to remember
Including further.

Preferably, the step of querying the supply amount of the initial token and the exchange token in the public chain network and calculating the exchange rate between the exchange token and the initial token by the supply amount is
A sub-step to determine if the initial token is a public chain token,
If the initial token is a public chain token, a sub-step to inquire about the supply amount of exchange tokens in the public chain network, and
A sub-step to calculate the exchange rate between the exchange token and the public chain token according to the supply amount of the exchange token,
If the initial token is not a public chain token, a sub-step to inquire about the supply amount of the initial token and the exchange token in the public chain network, and
A sub-step to calculate the exchange rate between initial tokens and public chain tokens based on the amount of initial tokens supplied,
A sub-step to calculate the exchange rate between the exchange token and the public chain token according to the supply amount of the exchange token,
A sub-step to calculate the exchange rate between the exchange token and the initial token,
including.

Preferably, prior to the step of receiving a supply transaction originating from the supply chain, the supply chain is verified to have a smart contract that matches the exchange rules of the public chain, and the smart contract is placed in the supply chain. If not, the step of placing smart contracts in the supply chain is
Sub-steps to determine if the supply chain supports the placement of smart contracts,
When the supply chain supports the placement of smart contracts, the sub-steps for placing smart contracts in the supply chain,
If the supply chain does not support the placement of smart contracts, the substep to place the parachain, which is a node in the public chain network, in the supply chain,
A sub-step to place smart contracts on the parachain so that the parachain initiates supply transactions on the public chain,
including.

In the second embodiment, the public chain-based token exchange method applied to the supply chain network according to the present application is
Steps to initiate a supply transaction in the public chain, including the type of supply token to be transferred to the public chain and the quantity of supply tokens,
The step of receiving the exchange rate between the supply token and the public chain token calculated by the public chain based on the supply amount of the supply token and confirming whether the transaction is completed, and
Includes the step of receiving a public chain token equivalent to the quantity of supply tokens transferred from the public chain after confirming the completion of the transaction.

Preferably, the step of receiving the exchange rate between the supply token and the public chain token calculated by the public chain based on the supply amount of the supply token and confirming whether the transaction is completed is
A sub-step to initiate a supply transaction in the parachain corresponding to the supply chain,
Control so that the public chain returns the exchange rate between the supply token and the public chain token to the parachain by the inquiry transaction by the parachain generating the inquiry transaction by the supply transaction and initiating the inquiry transaction to the public chain. Substeps to do and
A sub-step that controls the parachain to calculate the quantity of public chain tokens that can be obtained based on the exchange rate between supply tokens and public chain tokens and send the quantity of public chain tokens to the supply chain.
After receiving the quantity of public chain tokens, deciding whether to complete the transaction, and after deciding to complete the transaction, a sub-step to control the parachain to initiate a supply transaction in the public chain,
including.

In the third embodiment, the public chain-based token exchange method applied to the exchange chain network according to the present application is
Steps to initiate an exchange transaction on the public chain, including the quantity of initial tokens transferred to the public chain and the type of exchange token,
A step to confirm whether the transaction is completed by receiving the exchange rate between the exchange token and the public chain token calculated by the public chain based on the supply amount of the initial token and the exchange token.
Includes the step of receiving an exchange token equivalent to the quantity of public chain tokens transferred from the public chain after confirming the completion of the transaction.

Preferably, the step of receiving the exchange rate between the exchange token and the public chain token calculated by the public chain based on the supply amount of the exchange token and confirming whether or not the transaction is completed is
With the para-chain corresponding to the exchange chain, the sub-step to initiate the exchange transaction and
Control so that the public chain returns the exchange rate between the exchange token and the initial token to the parachain by the inquiry transaction by the parachain generating the inquiry transaction by the exchange transaction and initiating the inquiry transaction to the public chain. Substeps to do and
A sub-step that controls the parachain to calculate the quantity of exchange tokens that can be acquired based on the exchange rate between the exchange tokens and the initial tokens, and to send the quantity of exchange tokens to the exchange chain.
A sub-step that controls the public chain to initiate an exchange transaction after receiving the quantity of exchange tokens, deciding whether to complete the transaction, and after deciding to complete the transaction.
including.

In the fourth embodiment, the blockchain system based on the public chain according to the present application includes a public chain and a supply chain and an exchange chain that access the public chain network, and the public chain, the supply chain and the exchange chain are any of them. Is also a peer-to-peer network,
The supply chain
To initiate a supply transaction in the public chain, including the type of supply token transferred to the public chain and the quantity of supply tokens, and receive the public chain token transferred from the public chain.
Placed,
The exchange chain is
To initiate an exchange transaction in the public chain, including the quantity of initial tokens transferred to the public chain and the type of exchange token, and receive the exchange tokens transferred from the public chain.
Placed,
The public chain is
Receives supply transactions originating from the supply chain, inquires about the supply amount of supply tokens in the public chain network, calculates the exchange rate between supply tokens and public chain tokens based on the supply amount of supply tokens, and supplies supply tokens and public chain tokens. Transfer public chain tokens equivalent to the quantity of supply tokens to the supply chain, depending on the exchange rate with
Receives exchange transactions initiated from the exchange chain, inquires about the supply amount of exchange tokens and initial tokens in the public chain network, and calculates the exchange rate between exchange tokens and initial tokens based on the supply amount of exchange tokens and initial tokens. , Transfer tokens equivalent to the quantity of initial tokens to the exchange chain, depending on the exchange rate between the exchange tokens and the initial tokens.
Be placed.

As can be seen from the above technical proposal, the present application provides a token exchange method and a blockchain system based on a public chain, in which, in a practical application, a plurality of supply chains are equivalent to supply tokens provided by each of them. Initiate a supply transaction in the public chain to exchange for the public chain tokens of the public chain, the public chain remembers various supply tokens transferred from the supply chain and records the supply amount, and the exchange chain becomes the public chain. By initiating an exchange transaction, the public chain calculates the exchange rate based on the supply amount of the initial token specified in the exchange transaction and the exchange token, and extracts the exchange token equivalent to the initial token from the stored supply token. And transfer to a replacement chain. The method can provide an objective and rational exchange environment by determining the exchange rate between tokens different from each other by the public chain. In addition, by storing the supply token by the public chain after the supply transaction is generated, the exchange chain simply trades with the public chain without contacting the exchange destination when conducting the exchange transaction. The involvement of centralized programs is avoided and exchange efficiency is improved.

It is a flowchart of the token exchange method applied to the public chain network which concerns on this application. It is a flowchart in which the supply chain which concerns on this application conducts a supply transaction. It is a flowchart of the supply transaction with the pledge period which concerns on this application. It is a flowchart which determines whether the supply transaction which concerns on this application is supported by a contract. It is a flowchart of completion which completes the supply transaction by the parachain which concerns on this application. It is a flowchart which verifies the supply qualification of the token of the supply chain which concerns on this application. It is a flowchart in which the exchange chain which concerns on this application conducts an exchange transaction. It is a flowchart which calculates the exchange rate in the exchange transaction which concerns on this application. It is a flowchart which completes the exchange transaction by the parachain which concerns on this application. It is a structural schematic diagram of the token exchange blockchain system based on the public chain which concerns on this application.

In the technical proposal according to the present application, the blockchain network is a peer-to-peer (P2P) network having a decentralized application architecture, and the blockchain network is distributed storage, public consensus, digital encryption, transaction ledger entry, etc. And can be verified. That is, a trading platform that covers distributed technologies, cryptography, P2P network architectures, and various applicable consensus algorithms. The blockchain or blockchain information is ledger entry information generated by the transaction information when a transaction is generated in the blockchain network, that is, one block is composed of a plurality of specific transactions, and a plurality of blocks are formed. The blocks form one blockchain. The blockchain network contains nodes that establish peer-to-peer network connections with each other, and each node has a corresponding smart contract-like consensus mechanism, which performs transaction verification and ledger entry programs. It has sufficient computing power. A node further has an interface specification that conforms to a unified standard so that more nodes or other types of blockchain networks can be accessed through the interface specification.

The public chains, exchange chains, supply chains and parachains referred to herein are all different blockchain networks that are consistent with blockchain technology. In the present application, unless otherwise specified, the public chain, the exchange chain, the supply chain, and the parachain all refer to the corresponding networks, that is, the public chain network, the exchange chain network, the supply chain network, and the parachain network. .. Among them, the public chain network is a basic platform for the correspondingly arranged networks in general, and its node interface is an industry chain, consortium chain, private chain and third party created based on the public chain interface specifications. Access to multiple blockchain networks, such as blockchain networks. Each blockchain network can provide the corresponding service within the network as one independent development platform. In it, the public chain is standardized by defining a standard interface method so that it can be connected to other blockchains such as exchange chains and supply chains. In the present application, the public chain has the ability to support cross-chain relay, and also has the ability to store tokens, apply decentralization, and make smart contracts.

The exchange chain and the supply chain refer to the blockchain that is accessed by the public chain network, that is, in the present application, the public chain provides the basic platform, and the exchange chain and the supply chain are each as a blockchain network to access. Has the functions and services of. The exchange chain and supply chain may be a blockchain network created based on public chain network standards and interface specifications, that is, the exchange chain and supply chain communicate directly with the public chain network to provide services. It is possible to dock. The exchange chain and the supply chain may have their own interface specifications as independent networks, for example, Bitcoin, Ethereum, etc. of the existing blockchain network, or an industry chain developed in an industry. And a consortium chain, as well as a private chain created to meet certain service demands. Because of their dedicated network interface specifications, these existing blockchains, industry chains, consortium chains and private chains are generally not able to trade directly with each other, and thus with public chain networks. , In the present application, the public chain can be connected to other networks by means of a parachain.

A parachain can consist of some nodes in a public chain network, which can bridge the public chain to other non-direct trading networks. In the present application, for a network that cannot be directly traded, each blockchain network corresponds to one parachain, and the parachain has all the functions of the corresponding blockchain network, and the transactions in the blockchain network are synchronously converted. , Installed so that it can be communicated to the public chain network. Therefore, in the technical proposal according to the present application, the parachain can be determined as mirroring of the corresponding blockchain network, and for convenience of explanation, the corresponding blockchain network is regarded as the parent chain. In the present application, the parachain is composed of some nodes in the public chain network, and these nodes are also nodes in the parent chain and are for transmitting transaction information.

With the above configuration, the public chain can provide cross-chain relay in practical applications to complete tasks such as transaction verification, data proof, asset transfer, and smart contract execution. The public chain can quickly access other blockchain networks to the public chain network by unifying the interface specifications to the outside. The public chain will provide additional basic blockchain platform capabilities such as rapid completion of plan placement and verification, and completion of distributed storage and ledger entry programs in public chain networks. In addition, the public chain can provide a common development function as a basic platform, and the collaborative development and placement of multiple parachain smart contracts can be completed together.

In addition to recording its own blockchain information, the public chain can also store information summaries of the corresponding cross-chain transactions (eg, transaction summaries). Record the content related to cross-chain transactions with formatted transaction data. Also, in order to reduce the occupancy of distributed storage space in the public chain, the public chain can also record third party blockchain information by a specific compression algorithm when recording certain information. Illustratively, the block data formed and stored in the public chain is the block identifier (eg, serial number, time stamp, block hash value, and previous block hash value), block affiliation (ie, block generator). ), Other information in the block (eg, random values, difficulty values, and attachments, etc.), block weights, information summaries (eg, transaction tree, state tree, receipt tree, data tree, etc.), transaction fees, rebates, Can include size etc.

Referring to FIG. 1, it is a flowchart of a token exchange method applied to a public chain network. As can be seen from FIG. 1, the token exchange method according to the present application includes the following steps S11 to S13 when applied to a public chain network.
In step S11, a supply transaction originating from the supply chain is received, and the supply transaction includes a type of supply token and a quantity of supply tokens to be transferred to the public chain.
In step S12, the supply amount of the supply token in the public chain network is inquired, and the exchange rate between the supply token and the public chain token is calculated based on the supply amount of the supply token.
In step S13, the public chain token equivalent to the quantity of the supply token is transferred to the supply chain according to the exchange rate between the supply token and the public chain token.

The above steps aim to complete a supply transaction, which is a transaction operation of a supply token between the supply chain and the public chain. As shown in FIG. 2, in order to complete the supply transaction, the supply chain is arranged to perform steps S21-S23 as described below.
In step S21, a supply transaction including the type of supply token to be transferred to the public chain and the quantity of supply token is initiated in the public chain.
In step S22, the exchange rate between the supply token and the public chain token calculated by the public chain based on the supply amount of the supply token is received, and it is confirmed whether the transaction is completed.
In step S23, after confirming the completion of the transaction, the public chain token equivalent to the quantity of the supply token transferred from the public chain is received.

As can be seen from the above steps, in the proposed technology according to the present application, before the exchange chain initiates an exchange transaction, a transfer transaction between the supply chain and the public chain is first carried out in order to be involved in the subsequent exchange transaction. And transfer the tokens distributed in the supply chain to the public chain. That is, in a practical application, the supply chain first initiates a supply transaction in the public chain that includes the type of token of supply and the quantity of tokens that can be supplied. For example, six blockchain networks, network A to network F, are accessing the public chain network P, and in network A to network F, each type of token in circulation (or exchange transaction to the outside) is performed. The supported token types) are Ta, Tb, Tc, Td, Te, and Tf, respectively. When one of the blockchain networks (for example, network C) conducts a token supply transaction, the node in charge of the cross-chain transaction in network C (which can be referred to as a supply node in the present application) first supplies to the public chain network. Initiate a transaction, i.e., the supply chain performs step S21 above. The supply transaction includes a token Tc, which is a type of supply token to be transferred to the public chain, and a quantity of supply tokens to be transferred (eg, 1000 tokens Tc to be transferred to the public chain).

The public chain executes step S11 after the supply chain initiates a supply transaction, and inquires about the supply amount of supply tokens in the public chain network according to the content of the supply transaction. In a practical application, the same type of supply token may be from one blockchain network or from multiple blockchain networks, so for supply transactions initiated by the supply chain, first You can now ask the public chain network if the corresponding supply token is already stored. For example, the public chain P extracts supply tokens of type Tc and quantity of 1000 in the supply transaction after receiving the supply transaction, and the public chain P is the various supplies stored in the public chain network. If you inquire about the token Tc from the token and inquire that the current supply token Tc quantity is 1053, it is determined that the current supply quantity of the supply token is 1053, and the public chain will determine the value of this supply quantity and the public. The exchange rate between the current supply token Tc and the public chain token Tp is calculated by the public chain token Tp generated by the chain.

In the technical proposal according to the present application, the specific method for calculating the exchange rate between the supply token Tc and the public chain token Tp according to the supply amount is the calculation method promised in the public chain or the value exchange for which public consensus has already been obtained. It may be a protocol (eg, bankor protocol, etc.). In an actual application, the calculation method of the exchange rate based on the supply amount of the supply token is also a weighted calculation performed in consideration of other factors (for example, distribution degree weight, value stability weight of the blockchain network token, etc.). good.

It should be explained, in order to prevent the exchange rate from becoming abnormal or causing extremely unbalanced value fluctuations when the supply amount of supply tokens is 0 or too low in the public chain network. In the technical proposal according to the present application, when each blockchain network accesses the public chain network, the access blockchain network restricts some supply tokens to the reserve number of the supply token type by limiting the access with online conditions. The specific reserve value can be determined by the size of the accessed blockchain.

Further, as shown in FIG. 3, the step of inquiring the supply amount of the supply token in the public chain network and calculating the exchange rate between the supply token and the public chain token based on the supply amount of the supply token is the sub-step S131 as described below. Includes ~ S133.
In substep S131, a pledge token transferred from the supply chain is received, and the pledge token includes a set number of supply tokens transferred to the public chain and a public chain token transferred to the public chain at the same time. included.
In sub-step S132, the initial exchange rate is calculated based on the quantitative relationship between the supply token and the public chain token in the received pledge token.
In sub-step S133, the initial exchange rate is stored, and the exchange rate is adjusted in real time according to the subsequent transfer quantity of the supply token based on the initial exchange rate.

That is, in this embodiment, the supply chain corresponding to the supply token transfers the supply token to the public chain as the exchange side of the supply token, and pledges some public chain tokens to the public chain, that is, public. It is necessary to transfer the pledge token to the chain, and the pledge token includes a preset supply token to be transferred to the public chain and a public chain token to be transferred to the public chain at the same time. After receiving the pledge token, the public chain can calculate the initial exchange rate based on the quantity ratio relationship between the supply token and the public chain token. That is, in the technical proposal according to the present application, it is necessary for the project side to set the pledge of the supply token and the public chain token in the public chain for the initial exchange rate. Then, the subsequent supply node decides whether to sell the supply token to obtain the public chain token or to purchase the supply token to sell the public chain token based on this initial pledge setting. For convenience of explanation, after the supply chain has transferred the pledge tokens, a pool for token exchange can be formed in the public chain, in which the supply tokens and the public chain are used to support the token exchange transaction. There is a token. This pool can be understood as the concept of financial reserves.

As the exchange transaction takes place, the exchange rate between the supply token and the public chain token is updated in real time. That is, in the initial stage, the access node in the supply chain provides a preset quantity of supply tokens and the corresponding public chain tokens by the smart contract provided by the public chain to determine the corresponding exchange rate. For example, if the supply chain provides 1000 supply tokens and 10 public chain tokens, it is determined that the corresponding exchange rate is 100: 1, and such initially supplied tokens are reserved. Token. In subsequent applications, smart contracts can be called multiple times, each time a token exchange is completed, and frequent exchanges can update the corresponding exchange rate. ..

Since there is no exchange partner, it will be exchanged directly for a spare token, and the exchange rate is the current real-time rate. When the spare tokens are exhausted, there are two situations: One situation is that if the supply tokens are exhausted and overbought, the supply of supply tokens will be in short supply and the price of supply tokens will rise, so encourage the access chain network to provide supply tokens. Otherwise, prices will rise constantly. Another situation is that if the public chain tokens corresponding to the spare tokens are exhausted and oversold, the supply tokens will be dumped, the price will plummet, and the value of the supply tokens will return to zero. .. Therefore, in such a mechanism, each party involved in the token exchange will do its utmost to maintain one fair and reasonable exchange rate in order to secure its own interests. In this example, by updating the exchange rate as described above, the security and fairness of the public chain itself are ensured while protecting the interests of each exchange participant as much as possible and protecting the value of their tokens. You can protect your sexuality.

As can be seen from the above technical proposal, in the technical proposal according to the present application, the blockchain network that has accessed the public chain network initiates a supply transaction and supplies each type of token before the token exchange. As can be seen from the above, the seller supply chain exchanges pre-sold tokens for public chain tokens through the public chain and remembers the tokens sold through the public chain for exchange transactions without a buyer. Can be completed, and the efficiency of selling supply tokens can be greatly improved.

In the present application, when the supply chain initiates a supply transaction in the public chain, the supply node inside the supply chain generates and forms block data that matches the transaction specifications of one supply chain network by the supply transaction information. By broadcasting the block data on the supply chain network and the public chain network, respectively, one complete blockchain is formed in the supply chain network. A node in the public chain revalidates the block data and forms or further transforms the block data to match the transaction specifications of the public chain, thereby broadcasting on the public chain network, a complete block based on the public chain network. Form a chain and complete the ledger entry operation.

Similarly, after the public chain calculates the exchange rate, the node in charge of the transfer in the public chain transfers the equivalent public chain token to the supply chain according to the exchange rate and the quantity of supply tokens. The block data that matches the specifications is formed, and the block data is broadcast on the public chain network to form a complete blockchain. At the same time, by transmitting the block data to the supply chain network together with the transfer operation, the block data is broadcast again from the supply chain network to form a complete blockchain and complete the ledger entry operation.

In this embodiment, since the time stamp information is included in the block data by timing from the time when the public chain transfers the public chain token equivalent to the quantity of the supply token to the supply chain, the first block data The time stamp may be the timekeeping start point, or the time stamp of the last blockchain on which the complete blockchain is formed may be the timekeeping start time point. When the clock time reaches the time corresponding to the pledge period, the node in the public chain network initiates a return transaction in the supply chain, in which case it also inquires about the supply amount of the supply token in the public chain network and the supply amount. It is necessary to calculate the real-time exchange rate by and return the supply token to the supply chain according to the exchange rate.

In actual applications, any blockchain network that has accessed the public chain network can initiate supply transactions in the public chain as a supply chain, and in general, blockchain networks that differ from each other have their own dedicated interface specifications. Therefore, specialized consensus methods such as smart contracts and common contracts are needed so that transactions with public chains can be completed. Therefore, in some embodiments of the present application, it is necessary to verify whether a smart contract that conforms to the exchange rule of the public chain is placed in the supply chain prior to the step of receiving the supply transaction originating from the supply chain. If there is a corresponding smart contract, the supply transaction is created and completed directly through the smart contract, and if the smart contract is not placed in the supply chain, the above method is as shown in FIG. Further includes steps S101 to S104 as described below.
In step S101, it is determined whether the supply chain supports the placement of smart contracts.
In step S102, when the supply chain supports the placement of smart contracts, the smart contracts are placed in the supply chain.
In step S103, if the supply chain does not support the placement of smart contracts, a parachain, which is a part of the node in the public chain network, is placed in the supply chain.
In step S104, a smart contract is placed on the parachain so that the parachain initiates a supply transaction on the public chain.

In this embodiment, first, it can be determined whether the supply chain supports the placement of smart contracts, and the supply chain that supports the placement of smart contracts, for example, accesses the public chain network for the first time and also with the public chain network. For blockchain networks with the same interface specifications, it may support the placement of smart contracts, so smart contracts can be placed for the supply chain through the public chain. Supply chains that do not support the placement of smart contracts may select some public chain nodes as supply chain parachains for supply chains that have accessed the public chain according to certain rules or proximity principles in the public chain. can. As a node of the parachain, it has all the functions and information of the public chain and the supply chain, and also has a bridge connection function so that the supply transaction and transfer operation between the supply chain and the public chain can be completed. Can be placed in.

After placing the parachain on the supply chain, the public chain can place the smart contract on the parachain, and since the parachain is some node in the public chain, how to place the smart contract on the parachain , The corresponding supply chain information should be set in the smart contract and the bridge connection function should be given to the parachain so that the supply chain can initiate a supply transaction to the public chain through the parachain. It should be explained that the parachain node may be from the public chain network, from the supply chain network, or partly from the public chain network. , Some may be from the supply chain network. For nodes from the supply chain network, after deciding which node in the supply chain is the parachain network node, verify the node by public chain and the node as parachain supports the public chain network specification. You need to decide what you can do.

In some embodiments of the present application, when the blockchain network accesses the public chain through the parachain, the supply chain network cannot directly complete the transaction with the public chain, so that the public chain can be used as shown in FIG. The step of receiving the exchange rate between the supply token and the public chain token calculated by the supply amount of the supply token and confirming whether the transaction is completed includes the following sub-steps S221 to S224.
In substep S221, a supply transaction is initiated in the parachain corresponding to the supply chain.
In substep S222, the parachain generates an inquiry transaction by a supply transaction and initiates an inquiry transaction to the public chain, so that the public chain returns the exchange rate between the supply token and the public chain token to the parachain by the inquiry transaction. To control.
Substep S223 controls the parachain to calculate the quantity of public chain tokens that can be acquired based on the exchange rate between the supply token and the public chain token, and send the quantity of public chain tokens to the supply chain.
In sub-step S224, after receiving the quantity of the public chain token, determining whether to complete the transaction, and determining the completion of the transaction, control is performed so that the parachain initiates a supply transaction in the public chain.

In this embodiment, after the supply chain initiates a supply transaction through the parachain, the parachain can generate an inquiry transaction to the public chain by the supply transaction, and the inquiry transaction has a transaction token quantity of 0. Such a promised transaction or a designated transaction by a smart contract may be used, and the inquiry transaction requires information having the type of supply token. After receiving the inquiry transaction, the public chain returns the exchange rate between the supply token and the public chain token to the parachain by the inquiry transaction. The parachain transmits the returned exchange rate to the supply chain, or calculates the quantity of exchangeable public chain tokens by the supply transaction and the exchange rate, and the quantity of public chain tokens that can be obtained is the supply chain ( Or send to the supply node).

After receiving the quantity of public chain tokens from the parachain, the supply chain can make a judgment on it to determine if it can accept such exchange results. If the supply chain can accept the exchange result, it can be controlled so that the parachain sends the supply transaction to the public chain, and if it does not accept the exchange result, the parachain cancels the supply transaction. In addition, control can be performed.

In addition, in order to ensure the value stability of supply tokens, the public chain needs to verify the supply chain's token supply eligibility prior to the step of receiving supply transactions originating from the supply chain, as shown in Figure 6. As shown, the specific supply qualification verification method includes steps S105 to S107 as described below.
In step S105, the supply qualification of the supply token of the supply chain that has accessed the public chain network is verified by the quantity of the public chain tokens owned by the supply chain.
In step S106, if the quantity of public chain tokens owned by the supply chain is equal to or greater than the verification threshold value, it is determined that the supply chain is eligible for supply, and the supply transaction initiated from the supply chain is received.
In step S107, if the quantity of public chain tokens owned by the supply chain is less than the verification threshold, it is determined that the supply chain is not eligible for supply, a verification prompt is sent to the supply chain, and the supply chain can be provided. Remember the type of supply token.

In this embodiment, when each blockchain network accesses the public chain, it is possible to set a certain amount of public chain tokens to be acquired from the public chain as the transaction capital of the blockchain network. The quantity of public chain tokens that a competent or large blockchain network should own is large, and the quantity of public chain tokens owned by the supply chain determines the eligibility to supply supply tokens. By verifying the supply qualifications of the supply chain, it is possible to avoid large fluctuations in the supply quantity and reduce the occurrence of abnormal conditions in the exchange rate. Also, verification of the supply qualification of the supply chain can prevent individual small blockchain networks such as private chains from issuing fake tokens and destroying the exchange stability of public chain systems. can.

In the proposed technology of the present application, the supply chain supplies different types of tokens to the public chain and stores them in the public chain so that they can be exchanged by other blockchain networks that have accessed the public chain network. Of course, in the present application, the supply chain and the exchange chain refer to roles when performing different types of operations from each other. Any blockchain network that has accessed the public chain network can become a supply chain if it can meet the supply qualifications of the corresponding tokens, and all blockchain networks that have accessed the public chain network are exchange chains. You can get the required tokens by initiating an exchange transaction on the public chain. As shown in FIG. 1, in the exchange transaction, the public chain is arranged to execute steps S14 to S16 as described below.
In step S14, an exchange transaction originating from the exchange chain is received, and the exchange transaction includes the quantity of initial tokens to be transferred to the public chain and the type of exchange token.
In step S15, the supply amount of the initial token and the exchange token in the public chain network is inquired, and the exchange rate between the exchange token and the initial token is calculated based on the supply amount.
In step S16, the exchange tokens equivalent to the quantity of the initial tokens are transferred to the exchange chain according to the exchange rate between the exchange tokens and the initial tokens.

Accordingly, when performing the exchange transaction operation, as shown in FIG. 7, the exchange chain is arranged to execute steps S31 to S33 as described below.
In step S31, an exchange transaction is initiated in the public chain, and the exchange transaction includes the quantity of initial tokens to be transferred to the public chain and the type of exchange token.
In step S32, the public chain receives the exchange rate between the exchange token and the public chain token calculated by the supply amount of the initial token and the exchange token, and confirms that the transaction is completed.
In step S33, after confirming the completion of the transaction, the exchange token equivalent to the quantity of the public chain token transferred from the public chain is received.

In the technical proposal according to the present application, the blockchain network as an exchange chain first initiates an exchange transaction including the quantity of initial tokens and the type of exchange tokens in the public chain. For example, if the blockchain network as an exchange chain is network A, and one or more nodes in network A (ie, exchange nodes) exchange tokens Tc with 100 tokens Ta, then that node is An exchange transaction is initiated in the public chain, and the exchange transaction includes a token Ta having a quantity of 100 initial tokens to be transferred to the public chain, and the type of the exchange token is Tc. The exchange chain sends the exchange transaction containing the above information to the public chain, and after the public chain receives the exchange transaction, it extracts the type of the initial token and the exchange token, and the initial token and the exchange token on the public chain network. The supply amount is inquired, and the exchange rate at the time of exchange of these two types of tokens is calculated from the supply amount of these two types of tokens. The calculation method of the exchange rate is the same as the calculation method at the time of the occurrence of the supply transaction of the supply chain.

In practical applications, the type of initial token for exchange of the exchange chain may be of various forms, for example, the type of initial token for exchange of exchange chain network A is distributed in network A. It may be a token Ta, a public chain token Tp, or a token Tb, Te, or Tf distributed in another blockchain. Therefore, different methods can be used when calculating the exchange rate. Further, as shown in FIG. 8, the step of inquiring about the supply amount of the initial token and the exchange token in the public chain network and calculating the exchange rate between the exchange token and the initial token based on the supply amount is the following sub-step S151. Includes ~ S157.
In sub-step S151, it is determined whether the initial token is a public chain token.
In substep S152, if the initial token is a public chain token, the supply amount of the exchange token in the public chain network is inquired.
In sub-step S153, the exchange rate between the exchange token and the public chain token is calculated based on the supply amount of the exchange token.
In sub-step S154, if the initial token is not a public chain token, the supply amount of the initial token and the exchange token in the public chain network is inquired.
In sub-step S155, the exchange rate between the initial token and the public chain token is calculated based on the supply amount of the initial token.
In sub-step S156, the exchange rate between the exchange token and the public chain token is calculated based on the supply amount of the exchange token.
In sub-step S157, the exchange rate between the exchange token and the initial token is calculated.

In this embodiment, the exchange transaction initiated from the exchange chain can determine the type of token for the initial token, i.e., whether the initial token is a public chain token. If the initial token is a public chain token, that is, if the exchange chain network A exchanges tokens Tc with 100 public chain tokens Tp, then the public chain is the supply of exchange tokens (ie, the supply of tokens Tc). Should be obtained. Then, the exchange rate between the exchange token Tc and the public chain token Tp is calculated based on the supply amount of the exchange token. If the initial token is not a public chain token, that is, if the exchange chain network A exchanges tokens Tc with 100 tokens Ta, the public chain simultaneously inquires about the supply amount of the initial token Ta and the exchange token Tc, and the initial token. The exchange rate between Ta and the public chain token Tp and the exchange rate between the exchange token Tc and the public chain token Tp are calculated respectively, and the final initial token Ta and the exchange token Tc are calculated according to the exchange rates calculated twice. The exchange rate needs to be determined.

After calculating the exchange rate between the initial tokens and the exchange tokens, the public chain transfers the exchange tokens equivalent to the number of initial tokens to the exchange chain according to the quantity of the received transfer initial tokens. For example, if the exchange rate between the initial token Ta and the exchange token Tc is 5: 1, when the public chain receives 100 tokens Ta, 20 Tc are transferred to the exchange chain according to the exchange rate, and after the transfer. , 100 tokens Ta are stored in the public chain, and in this case, 100 are added to the supply amount of tokens Ta stored in the public chain.

Further, as shown in FIG. 9, the step of receiving the exchange rate between the exchange token and the public chain token calculated by the public chain based on the supply amount of the exchange token and confirming whether the transaction is completed is as follows. Includes substeps S321-S324.
Substep S321, which initiates an exchange transaction by means of a parachain corresponding to the exchange chain,
In substep S322, the parachain generates an inquiry transaction by an exchange transaction and initiates an inquiry transaction to the public chain, so that the public chain returns the exchange rate between the exchange token and the initial token to the parachain by the inquiry transaction. To control.
In sub-step S323, control is performed so that the parachain calculates the quantity of exchange tokens that can be acquired based on the exchange rate between the exchange token and the initial token, and transmits the quantity of exchange tokens to the exchange chain.
In sub-step S324, after receiving the quantity of exchange tokens, determining whether to complete the transaction, and determining the completion of the transaction, control is performed so that the parachain initiates the exchange transaction in the public chain.

In this embodiment, it is similar to the format at the time of supply transaction. After the exchange chain initiates an exchange transaction through the parachain, the parachain can generate an inquiry transaction to the public chain by the exchange transaction. Similarly, the inquiry transaction in this embodiment may be a promised transaction in which the quantity of transaction tokens is 0, or a designated transaction by a smart contract, and the inquiry transaction is a type of exchange token. Information with is needed. After receiving the inquiry transaction, the public chain returns the exchange rate between the exchange token and the initial token to the parachain by the inquiry transaction. Parachain transmits the returned exchange rate to the exchange chain, or calculates the quantity of exchangeable public chain tokens by the exchange transaction and the exchange rate, and the quantity of public chain tokens that can be obtained is the exchange chain ( Or send to the exchange node).

After receiving the quantity of public chain tokens from the parachain, the exchange chain can make a judgment against it to determine if such exchange results can be accepted. If the exchange chain can accept the exchange result, it can be controlled so that the parachain sends the exchange transaction to the public chain, and if it does not accept the exchange result, the parachain cancels the exchange transaction. In addition, control can be performed.

Similar to the process of supply transactions originating from a supply chain, in the present application, when an exchange chain initiates a supply transaction to a public chain, the exchange nodes inside the exchange chain trade in one exchange chain network with exchange transaction information. By generating block data that conforms to the specifications and broadcasting the formed block data on the exchange chain network and the public chain network, respectively, one complete blockchain is formed in the exchange chain network. A node in the public chain revalidates the block data of the exchange transaction and forms or further transforms the block data that matches the transaction specifications of the public chain, thereby broadcasting on the public chain network to complete the public chain network. Form a blockchain based on and complete the ledger entry operation.

It should be explained that the exchange chain Ta and the supply chain Tc described in the above embodiment are merely examples for facilitating explanation, and in actual application, access to a public chain network. Blockchain networks such as third party public chains, third party industry chains and consortium chains, private chains, and subchains developed based on public chain interface specifications, all simultaneously supply and exchange chains. It may be a chain. Also, since different blockchain networks have their own functions, it is possible to supply a plurality of types of tokens to the same blockchain network. In the transfer of the exchange token and the public chain token to the supply chain or the exchange chain by the public chain described in the present application, the exchange chain and the supply chain do not directly receive the transferred token, and the public chain or the blockchain. The transfer can be completed through the corresponding account on the network, i.e. opened in the public chain to avoid the problem that the exchange chain cannot recognize the exchange token between two incompatible blockchain networks. The transfer can be completed through the created account.

In the technical proposal according to the present application, the essence of the process of trading the supply chain (for example, the supply chain network C) is to exchange other kinds of tokens (for example, Ta) with the token Tc. After the supply transaction is completed, the token Ta can be exchanged directly with the acquired public chain token Tp, that is, network C initiates the exchange transaction as an exchange chain and 3000 public chain tokens Tp in the public chain. By transferring, the equivalent token Ta can be exchanged.

As can be seen from the above, in the present application, the blockchain network as a supply chain can exchange the required tokens with the public chain token after exchanging the public chain token through the public chain, and other in the whole process. Complete the token exchange without any contact with the blockchain network, that is, in the absence of a partner. Similarly, in the exchange chain, since the token exchange is completed by the public chain, there is no need to contact the exchange destination. Therefore, the whole exchange process is completed by a decentralized application in the public chain network, and the transaction process also completes the ledger entry program with the public chain and the blockchain network involved, which is relatively objective and fair. Exchange environment can be provided.

In the token exchange method according to the present application, in both the supply transaction and the exchange transaction, in the step of determining the exchange rate between the two types of tokens, it can be calculated by the token supply amount according to the above plan. You can create one regularly updated exchange rate table in a public chain network. The exchange rate table provides exchange rates between multiple types of tokens, which may be calculated and provided by some dedicated node to balance the token value in the public chain. It may also be provided by a financial industry chain that has access to a public chain network. However, the financial industry chain that has accessed the public chain network will have other blockchain networks related to maintenance nodes and profits in the public chain so that when they access the public chain network, a more reasonable exchange rate will be provided. , You can vote online for the financial industry chain to determine the authority and effectiveness of the financial industry chain. Of course, in practical applications, when determining the exchange rate between two types of tokens, the public chain can exchange both at maximum on the premise of ensuring exchange efficiency by referring to the exchange rate table as well as the supply amount. It is also possible to secure interests.

Based on the token exchange method described above, the present application further provides a blockchain system based on a public chain, wherein the blockchain system is a public chain and a supply chain and exchange to access a public chain network. Public chains, supply chains and exchange chains, including chains, are all peer-to-peer networks.
The supply chain
To initiate a supply transaction in the public chain, including the type of supply token transferred to the public chain and the quantity of supply tokens, and receive the public chain token transferred from the public chain.
Placed,
The exchange chain is
To initiate an exchange transaction in the public chain, including the quantity of initial tokens transferred to the public chain and the type of exchange token, and receive the exchange tokens transferred from the public chain.
Placed,
The public chain is
Receives supply transactions originating from the supply chain, inquires about the supply amount of supply tokens in the public chain network, calculates the exchange rate between supply tokens and public chain tokens based on the supply amount of supply tokens, and supplies supply tokens and public chain tokens. By the exchange rate with, the quantity of supply tokens and the equivalent public chain tokens are transferred to the supply chain,
Receives exchange transactions initiated from the exchange chain, inquires about the supply amount of exchange tokens and initial tokens in the public chain network, and calculates the exchange rate between exchange tokens and initial tokens based on the supply amount of exchange tokens and initial tokens. , Transfer tokens equivalent to the quantity of initial tokens to the exchange chain, depending on the exchange rate between the exchange tokens and the initial tokens.
Be placed.

As can be seen from the above technical proposal, the present application provides a token exchange method and a blockchain system based on a public chain, in which a plurality of supply chains initiate a supply transaction to the public chain in a practical application. , Exchange equivalent public chain tokens with the supply tokens provided by each, the public chain stores and records the supply amount for various supply tokens transferred from the supply chain, and the exchange chain exchanges for the public chain. After initiating a transaction, the public chain calculates the exchange rate based on the supply amount of the initial token specified in the exchange transaction and the exchange token, and extracts the exchange token equivalent to the initial token from the stored supply token. Transfer to a replacement chain. The method can provide an objective and rational exchange environment by determining the exchange rate between different tokens by the public chain. In addition, by storing the supply token by the public chain after the supply transaction is generated, the exchange chain simply trades with the public chain without contacting the exchange destination when conducting the exchange transaction, and is centralized. Avoid the involvement of various programs and improve exchange efficiency.

Similar parts between the embodiments of the present application may be referred to each other, and the specific embodiments provided above are merely examples within the gist of the present application and cover the scope of protection of the present application. It does not limit. Any embodiment of the art devised by one of ordinary skill in the art, without creative labor, falls within the scope of protection of the present application.

Claims (10)

A public chain-based token exchange method applied to public chain networks.
A step of receiving a supply transaction originating from the supply chain, including the type of supply token transferred to the public chain and the quantity of the supply token.
A step to inquire about the supply amount of supply tokens in the public chain network and calculate the exchange rate between the supply token and the public chain token based on the supply amount of supply tokens.
The step of transferring public chain tokens equivalent to the quantity of supply tokens to the supply chain according to the exchange rate between supply tokens and public chain tokens,
The step of receiving an exchange transaction originating from the exchange chain, including the quantity of initial tokens transferred to the public chain and the type of exchange token,
The step of inquiring the supply amount of the initial token and the exchange token in the public chain network and calculating the exchange rate between the exchange token and the initial token by the supply amount,
Including the step of transferring exchange tokens equivalent to the quantity of initial tokens to the exchange chain, depending on the exchange rate between the exchange tokens and the initial tokens.
A method of exchanging tokens based on a public chain, which is characterized by that. The step of querying the supply amount of supply tokens in the public chain network and calculating the exchange rate between supply tokens and public chain tokens based on the supply amount of supply tokens is
A sub-step to receive a pledge token that includes a preset quantity of supply tokens transferred from the supply chain to the public chain and a public chain token transferred to the public chain at the same time.
A sub-step to calculate the initial exchange rate based on the quantitative relationship between the supply token and the public chain token in the received pledge token,
A sub-step that stores the initial exchange rate and adjusts the exchange rate in real time according to the subsequent transfer quantity of supply tokens based on the initial exchange rate.
The exchange method according to claim 1, wherein the exchange method is characterized in that. Prior to the step of receiving a supply transaction originating from the supply chain, the method described above
The step of verifying the supply qualification of the supply token of the supply chain that accessed the public chain network by the quantity of public chain tokens owned by the supply chain,
If the quantity of public chain tokens owned by the supply chain is greater than or equal to the verification threshold, the supply chain is determined to be eligible for supply, and the steps to receive supply transactions originating from the supply chain,
If the quantity of public chain tokens owned by the supply chain is less than the verification threshold, it is determined that the supply chain is not eligible for supply, a verification prompt is sent to the supply chain, and the type of supply token that the supply chain can provide. To remember the steps, including further,
The exchange method according to claim 1, wherein the exchange method is characterized in that. The step of querying the supply amount of initial tokens and exchange tokens in the public chain network and calculating the exchange rate between the exchange tokens and the initial tokens based on the supply amount is
A sub-step to determine if the initial token is a public chain token,
If the initial token is a public chain token, a sub-step to inquire about the supply amount of exchange tokens in the public chain network, and
A sub-step to calculate the exchange rate between the exchange token and the public chain token according to the supply amount of the exchange token,
If the initial token is not a public chain token, a sub-step to inquire about the supply amount of the initial token and the exchange token in the public chain network, and
A sub-step to calculate the exchange rate between initial tokens and public chain tokens based on the amount of initial tokens supplied,
A sub-step to calculate the exchange rate between the exchange token and the public chain token according to the supply amount of the exchange token,
Including a sub-step to calculate the exchange rate between the exchange token and the initial token,
The exchange method according to claim 1, wherein the exchange method is characterized in that. Prior to the step of receiving a supply transaction originating from the supply chain, verify that the supply chain has a smart contract that matches the exchange rules of the public chain, and that the supply chain does not have a smart contract. , The steps to place smart contracts in the supply chain,
Sub-steps to determine if the supply chain supports the placement of smart contracts,
When the supply chain supports the placement of smart contracts, the sub-steps for placing smart contracts in the supply chain,
If the supply chain does not support the placement of smart contracts, the substep to place the parachain, which is a node in the public chain network, in the supply chain,
Including sub-steps to place smart contracts on the parachain, so that the parachain initiates supply transactions on the public chain,
The exchange method according to claim 1, wherein the exchange method is characterized in that. A public chain-based token exchange method applied to supply chain networks.
Steps to initiate a supply transaction in the public chain, including the type of supply token to be transferred to the public chain and the quantity of supply tokens,
The step of receiving the exchange rate between the supply token and the public chain token calculated by the public chain based on the supply amount of the supply token and confirming whether the transaction is completed, and
Including the step of receiving a public chain token equivalent to the quantity of supply tokens transferred from the public chain after confirming the completion of the transaction,
A method of exchanging tokens based on a public chain, which is characterized by that. The step of receiving the exchange rate between the supply token and the public chain token calculated by the public chain based on the supply amount of the supply token and confirming whether the transaction is completed is
A sub-step to initiate a supply transaction in the parachain corresponding to the supply chain,
Control so that the public chain returns the exchange rate between the supply token and the public chain token to the parachain by the inquiry transaction by the parachain generating the inquiry transaction by the supply transaction and initiating the inquiry transaction to the public chain. Substeps to do and
A sub-step that controls the parachain to calculate the quantity of public chain tokens that can be obtained based on the exchange rate between supply tokens and public chain tokens and send the quantity of public chain tokens to the supply chain.
Includes a sub-step, which controls the parachain to initiate a supply transaction on the public chain, after receiving the quantity of public chain tokens, deciding whether to complete the transaction, and after deciding to complete the transaction.
The exchange method according to claim 6, wherein the exchange method is characterized in that. A public chain-based token exchange method applied to exchange chain networks.
Steps to initiate an exchange transaction on the public chain, including the quantity of initial tokens to be transferred to the public chain and the type of exchange token,
A step to confirm whether the transaction is completed by receiving the exchange rate between the exchange token and the public chain token calculated by the public chain based on the supply amount of the initial token and the exchange token.
Including, after confirming the completion of the transaction, the step of receiving an exchange token equivalent to the quantity of public chain tokens transferred from the public chain.
A method of exchanging tokens based on a public chain, which is characterized by that. The step of receiving the exchange rate between the exchange token and the public chain token calculated by the public chain based on the supply amount of the exchange token and confirming whether the transaction is completed is
With the para-chain corresponding to the exchange chain, the sub-step to initiate the exchange transaction and
By generating an inquiry transaction by the exchange transaction and initiating the inquiry transaction to the public chain, the public chain controls to return the exchange rate between the exchange token and the initial token to the parachain by the inquiry transaction. Substeps and
A sub-step that controls the parachain to calculate the quantity of exchange tokens that can be acquired based on the exchange rate between the exchange tokens and the initial tokens, and to send the quantity of exchange tokens to the exchange chain.
Includes a sub-step, which controls the parachain to initiate an exchange transaction on the public chain, after receiving the quantity of exchange tokens, deciding whether to complete the transaction, and after deciding to complete the transaction.
The exchange method according to claim 8, wherein the exchange method is characterized in that. The public chain, the supply chain and the exchange chain, including the public chain and the supply chain and the exchange chain accessing the public chain network, are both peer-to-peer networks.
The supply chain
To initiate a supply transaction in the public chain, including the type of supply token transferred to the public chain and the quantity of supply tokens, and receive the public chain token transferred from the public chain.
Placed,
The exchange chain is
To initiate an exchange transaction in the public chain, including the quantity of initial tokens transferred to the public chain and the type of exchange token, and receive the exchange tokens transferred from the public chain.
Placed,
The public chain is
Receives supply transactions originating from the supply chain, inquires about the supply amount of supply tokens in the public chain network, calculates the exchange rate between supply tokens and public chain tokens based on the supply amount of supply tokens, and supplies supply tokens and public chain tokens. By the exchange rate with, the quantity of supply tokens and the equivalent public chain tokens are transferred to the supply chain,
Receives exchange transactions initiated from the exchange chain, inquires about the supply amount of exchange tokens and initial tokens in the public chain network, and calculates the exchange rate between exchange tokens and initial tokens based on the supply amount of exchange tokens and initial tokens. , Transfer tokens equivalent to the quantity of initial tokens to the exchange chain, depending on the exchange rate between the exchange tokens and the initial tokens.
Be placed,
A blockchain system based on a public chain that is characterized by that.

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