Abstract: This specification describes techniques for managing assets in a blockchain. One example method includes receiving, from a target user recorded in a distributed database of a blockchain network, a user input including a request to convert an asset object from a first asset type to a second asset type, in response to receiving the user input, determining a contract object published in the blockchain network and corresponding to the first asset type, converting the asset object of the first asset type into the asset object of the second asset type, and updating a target object by adding the asset object of the second asset type to the target object that was generated using the contract object for the asset object of the first asset type.

Abstract: This specification describes techniques for managing assets in a blockchain. One example method includes receiving, from a target user recorded in a distributed database of a blockchain network, a user input including a request to update a status of a target object, determining, based on a contract object, whether the target user is a member user with an update permission for the target object, the contract object being published in the blockchain network and corresponding to an asset type of the target object, wherein the target object was created using the contract object, and in response to determining that the target user has the update permission for the target object, performing a status update on the target object by using the contract object.

Abstract: This specification describes techniques for managing assets in a blockchain. One example method includes receiving, from a target user recorded in a distributed database of the blockchain network, a user input including a request to generate an asset object in the blockchain network, the blockchain network including an account object and a contract object, determining, based on the user input, an asset type of the asset object, initiating, in the blockchain network, the contract object corresponding to generate the asset object based on the asset type, the asset object including a digital asset corresponding to a physical asset associated with the target user, assigning the asset object to a target object of the target user, and adding address information of the asset object to the target object.

Abstract: A fund flow request for a specified amount between a payer and a payee is received by a first member of a blockchain. A fund flow route between the first member and a second member corresponding to the payee in the blockchain is determined, where the fund flow route includes the first member, the second member, and a number of relay members associated with the blockchain. A compliance check request to at least two other members included in the fund flow route is initiated, so that the at least two other members concurrently perform compliance checks on a fund flow event corresponding to the fund flow request. Whether each compliance check result generated by each member performing the compliance check is qualified is determined. In response to determining that each compliance check result is qualified, the fund flow event is completed.

Abstract: Techniques for adjusting blockchain balances are described. One example of a method includes detecting changes to blockchain balances deposited on an anchor point in a blockchain, wherein the changes to the blockchain balances are caused by transactions submitted by one or more members of a blockchain network that maintains the blockchain; querying, by a member of the blockchain network associated with the anchor point, a blockchain balance deposited on the anchor point in the blockchain; determining whether a changed amount of the blockchain balance is greater than or equal to a predetermined change threshold; and in response to determining that the changed amount of the blockchain balance is greater than or equal to a predetermined change threshold, initiating, by the member, a balance adjusting contract operation to adjust the blockchain balance so that the changed amount is less than the predetermined change threshold.

Abstract: A request for fund flow of a specified amount between a payer and a payee is received by a first member of a blockchain. A fund flow route between the first member and a second member corresponding to the payee in the blockchain is determined by the first member, where the fund flow route comprises the first member, the second member, and several relay members, and blockchain balances deposited by all members of the fund flow route at all anchor points of the blockchain are registered in a blockchain ledger of the blockchain. A fund flow contract operation is initiated by the first member. In response to initiating the fund flow contract operation, the blockchain balances of all the members of the fund flow route registered in the blockchain ledger are uniformly changed, where the second member pays funds of the specified amount to the payee.