Abstract: A charging station monitoring system including: a sensing device, a digital camera and a communication device which are arranged at a charging apparatus of a charging station, the sensing device and the digital camera each having a sensing range covering a parking lot associated with the charging apparatus and an area around the parking lot; a controller configured to determine an occupation state of the parking lot and/or detect and record an action of a third party or foreign object based on sensed information from the sensing device and the digital camera; and a charging assistance device configured to recommend an environmentally friendly charging station if an energy storage device of the electric vehicle has not been fully charged and needs to be further charged.

Abstract: Disclosed herein are methods, systems, and apparatus for processing blockchain-based guarantee information. One of the methods includes receiving a first cyphertext of a first digital document specifying a guarantee from a first computing device associated with at least a first guarantor and one or more zero-knowledge proofs (ZKPs) related to one or more values associated with the guarantee, and the first digital document specifies one or more predetermined conditions of executing the guarantee; verifying that the one or more ZKPs are correct; storing the first cyphertext to a blockchain based on performing a consensus algorithm; receiving a first message from a second computing device associated with a beneficiary or a representative of the beneficiary.

Abstract: Implementations of the present specification disclose a blockchain data processing method, apparatus, device, and system. A request for transitioning a state of a contract stored at a blockchain system is received at a plurality of blockchain nodes of the blockchain system. The request includes signature data of at least one state participant of the contract. The contract is associated with a pre-determined number of participants. The signature data is verified at a blockchain node. The verification is based on at least one public key corresponding to the at least one state participant. A determination is made whether the signature data of the at least one state participant is verified. In response to determining that the signature data of the at least one state participant is verified, a new contract state defined in the request is confirmed. The pre-determined number of participants is pre-determined in the contract.

Abstract: Implementations of this specification include receiving a synchronization request from a light-weight node of the blockchain network including an identity of the light-weight node; identifying one or more permissions associated with the identity of the light-weight node; determining an original world state structure associated with the block height and including a plurality of account records; identifying based on the one or more permissions, a subset of the plurality of account records that are authorized for access by the light-weight node; generating an isolated world state structure based on the original world state data structure including only the subset of the plurality of account records that are authorized for access by the light-weight node; sending a response to the light-weight node that includes the isolated world state data structure.

Abstract: Disclosed herein are methods, systems, and apparatus for processing blockchain-based guarantee information. One of the methods includes receiving a first cyphertext of a first digital document specifying a guarantee from a first computing device associated with at least a first guarantor and one or more zero-knowledge proofs (ZKPs) related to one or more values associated with the guarantee, and the first digital document specifies one or more predetermined conditions of executing the guarantee; verifying that the one or more ZKPs are correct; storing the first cyphertext to a blockchain based on performing a consensus algorithm; receiving a first message from a second computing device associated with a beneficiary or a representative of the beneficiary.

Abstract: Implementations of this specification include receiving a synchronization request from a light-weight node of the blockchain network including an identity of the light-weight node; identifying one or more permissions associated with the identity of the light-weight node; determining an original world state structure associated with the block height and including a plurality of account records; identifying based on the one or more permissions, a subset of the plurality of account records that are authorized for access by the light-weight node; generating an isolated world state structure based on the original world state data structure including only the subset of the plurality of account records that are authorized for access by the light-weight node; sending a response to the light-weight node that includes the isolated world state data structure.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for processing blockchain-based guarantee information. One of the methods includes receiving a cyphertext of a digital document specifying a guarantee and one or more zero-knowledge proofs (ZKPs) related to one or more values associated with the guarantee; verifying the one or more ZKPs; upon successfully verifying the one or more ZKPs, storing the cyphertext to a blockchain based on performing a consensus algorithm; receiving a drawdown request of the guarantee from a first computing device associated with the beneficiary or a representative of the beneficiary; storing the drawdown request to the blockchain based on performing a consensus algorithm; and delivering a first message about the drawdown request to a second computing device associated with the first guarantor.

Abstract: Disclosed herein are methods, systems, and apparatus for processing blockchain-based guarantee information. One of the methods includes receiving a cyphertext of a digital document specifying a guarantee from a first computing device associated with a guarantor and one or more zero-knowledge proofs (ZKPs) related to one or more values associated with the guarantee; verifying that the one or more ZKPs are correct; storing the first cyphertext to a blockchain based on performing a consensus algorithm; receiving a first message from the first computing device associated with the guarantor, the first message including a request to cancel the guarantee; storing the request to cancel the guarantee in the blockchain; sending a second message to a second computing device associated with the beneficiary or a representative of the beneficiary; and receiving a third message from the second computing device associated with the beneficiary or the representative of the beneficiary.

Abstract: Disclosed herein are methods, systems, and apparatus for processing blockchain-based guarantee information. One method includes receiving a cross-chain request for relaying a cyphertext of a digital document to a second blockchain network, the digital document specifies a guarantee from the guarantor and one or more predetermined conditions of executing the guarantee, wherein the guarantee is made by the guarantor to a beneficiary; storing the cross-chain request and the cyphertext to a first blockchain associated with the first blockchain network based on performing a consensus algorithm; receiving a message from a second computing device for relaying information between the first blockchain network and the second blockchain network, the message includes a confirmation that the guarantee is accepted by the beneficiary and stored on a second blockchain associated with the second blockchain network; and updating a status of the guarantee to indicate that the guarantee has been voided on the first blockchain.

Abstract: A method includes receiving a cyphertext of a digital document specifying a guarantee and one or more zero-knowledge proofs (ZKPs) related to a value associated with the guarantee; verifying the one or more ZKPs; upon successfully verifying the one or more ZKPs, storing the cyphertext to a blockchain based on performing a consensus algorithm; receiving a first message from a first computing device associated with the beneficiary or a representative of the beneficiary indicating there is no outstanding claim for the guarantee; sending a second message to a second computing device associated with a guarantor to confirm that the guarantor is discharged from undertaking payment under the guarantee; receiving a third message from the second computing device associated with the guarantor requesting the status of the guarantee to be changed to expired; and updating the status of the guarantee stored in the blockchain to indicate that the guarantee has expired.

Abstract: Implementations of this specification include receiving a synchronization request from a light-weight node of the blockchain network including an identity of the light-weight node; identifying one or more permissions associated with the identity of the light-weight node; determining an original world state structure associated with the block height and including a plurality of account records; identifying based on the one or more permissions, a subset of the plurality of account records that are authorized for access by the light-weight node; generating an isolated world state structure based on the original world state data structure including only the subset of the plurality of account records that are authorized for access by the light-weight node; sending a response to the light-weight node that includes the isolated world state data structure.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for processing blockchain-based guarantee information. One of the methods includes receiving a cyphertext of a digital document specifying a guarantee from a first computing device associated with a first guarantor and one or more zero-knowledge proofs (ZKPs) related to one or more values associated with the guarantee; verifying that the one or more ZKPs are correct; upon verifying that the one or more ZKPs are correct, storing the cyphertext to a blockchain based on performing a consensus algorithm; receiving a first message from a second computing device associated with a beneficiary or a representative of the beneficiary, the first message including an acceptance of the guarantee by the beneficiary; and updating a status of the guarantee to indicate that the guarantee has been accepted by the beneficiary.

Abstract: A computer-implemented method includes receiving a participation request from a participant requesting a blockchain resource; invoking a first smart contract that generates a random character sequence for the participant, the generated random character sequence satisfying a predetermined rule; publishing the random character sequence and identity information of the corresponding participant on a blockchain in a manner that identifies the correspondence; and invoking a second smart contract for allocating a benefit certificate corresponding to the blockchain resource to the participant, wherein the second smart contract is used to: obtain a target character sequence satisfying the predetermined rule that is generated later than the generation of the random character sequence and published on the blockchain; and allocate a first benefit certificate to the participant when the random character sequence matches the target character sequence; and publishing a matching result between the random character sequence a

Abstract: Disclosed herein are methods, systems, and apparatus for processing blockchain-based guarantee information. One of the methods includes receiving a first cyphertext of a first digital document specifying a guarantee from a first computing device associated with at least a first guarantor and one or more zero-knowledge proofs (ZKPs) related to one or more values associated with the guarantee, and the first digital document specifies one or more predetermined conditions of executing the guarantee; verifying that the one or more ZKPs are correct; storing the first cyphertext to a blockchain based on performing a consensus algorithm; receiving a first message from a second computing device associated with a beneficiary or a representative of the beneficiary.

Abstract: Implementations of the present specification disclose blockchain data processing methods, apparatuses, devices, and systems, including a computer-implemented method for blockchain data processing. Blockchain transaction data of a plurality of transaction participants is received. Each of the plurality of transaction participants provides a respective certificate indicating a respective legal membership in a blockchain. The respective legal membership enables processing of the blockchain transaction data. A mutual identity querying is performed to confirm whether each of the plurality of transaction participants has the respective legal membership in the blockchain. Supervision keys of a supervision node in the blockchain are determined, where the supervision node corresponds to a supervisor, and where the supervision keys are dynamically updated based on a predetermined rule. The blockchain transaction data is encrypted by using the supervision keys. The blockchain transaction data is stored.

Abstract: Implementations of the present specification disclose a blockchain data processing method, apparatus, device, and system. A request for transitioning a state of a contract stored at a blockchain system is received at a plurality of blockchain nodes of the blockchain system. The request includes signature data of at least one state participant of the contract. The contract is associated with a pre-determined number of participants. The signature data is verified at a blockchain node. The verification is based on at least one public key corresponding to the at least one state participant. A determination is made whether the signature data of the at least one state participant is verified. In response to determining that the signature data of the at least one state participant is verified, a new contract state defined in the request is confirmed. The pre-determined number of participants is pre-determined in the contract.

Abstract: A computer-implemented method includes receiving a participation request from a participant requesting a blockchain resource; invoking a first smart contract that generates a random character sequence for the participant, the generated random character sequence satisfying a predetermined rule; publishing the random character sequence and identity information of the corresponding participant on a blockchain in a manner that identifies the correspondence; and invoking a second smart contract for allocating a benefit certificate corresponding to the blockchain resource to the participant, wherein the second smart contract is used to: obtain a target character sequence satisfying the predetermined rule that is generated later than the generation of the random character sequence and published on the blockchain; and allocate a first benefit certificate to the participant when the random character sequence matches the target character sequence; and publishing a matching result between the random character sequence a

Abstract: Implementations of the present specification disclose a blockchain data processing method, apparatus, device, and system. A request for transitioning a state of a contract stored at a blockchain system is received at a plurality of blockchain nodes of the blockchain system. The request includes signature data of at least one state participant of the contract. The contract is associated with a pre-determined number of participants. The signature data is verified at a blockchain node. The verification is based on at least one public key corresponding to the at least one state participant. A determination is made whether the signature data of the at least one state participant is verified. In response to determining that the signature data of the at least one state participant is verified, a new contract state defined in the request is confirmed. The pre-determined number of participants is pre-determined in the contract.

Abstract: Implementations of the present disclosure include receiving a transfer request including a first identifier of a first node, a second identifier of a second node, an identifier of a smart asset, and a value, determining whether the smart asset is capable of transfer at least partially based on the identifier of the smart asset, and the value, and in response to determining that the smart asset is capable of being transferred, automatically: providing a first smart asset and a second smart asset, the first smart asset being assigned a first identifier, a first value, and including properties of the smart asset, the second smart asset being assigned a second identifier, the value, and including properties of the smart asset, recording the first smart asset to the first node, and the second smart asset to the second node, and deleting the smart asset.

Abstract: Implementations of the present disclosure include receiving a merger request including a first identifier of a first node, a second identifier of a second node, and an identifier of a first smart asset, the first smart asset being associated with the first node, determining whether the first smart asset is capable of merger with a second smart asset associated with the second node at least partially based on the identifier of the first smart asset and an identifier of the second smart asset, and, in response to determining that the first smart asset is capable of being merged with the second smart asset, automatically: updating the second smart asset, the updated second smart asset being assigned a value, and including properties of the first smart asset, recording the updated second smart asset to the second node, and deleting the first smart asset.