Abstract: The present disclosure provides a permission-controlled smart contract upgrade method. The method first deploys a contract upgrade smart contract, and then deploys a smart contract to be upgraded including information of a required minimum number of agreements on passing a proposal related to the contract. Then, any of the blockchain nodes receives a contract upgrade proposal submitted by one of the plurality of user clients. After the contract upgrade smart contract determines to pass the proposal, a proposing event is generated and then is forwarded to each user client participating in the contract. After the user client receives the proposing event, the user client receives user's vote and feeds it back to the contract upgrade smart contract. If the number of agreements exceeds the required minimum number of agreements, the proposal is passed and employed, and a binary replacement is performed to complete upgrade of the smart contract.

Abstract: The present disclosure provides a permission-controlled smart contract upgrade method. The method first deploys a contract upgrade smart contract, and then deploys a smart contract to be upgraded including information of a required minimum number of agreements on passing a proposal related to the contract. Then, any of the blockchain nodes receives a contract upgrade proposal submitted by one of the plurality of user clients. After the contract upgrade smart contract determines to pass the proposal, a proposing event is generated and then is forwarded to each user client participating in the contract. After the user client receives the proposing event, the user client receives user's vote and feeds it back to the contract upgrade smart contract. If the number of agreements exceeds the required minimum number of agreements, the proposal is passed and employed, and a binary replacement is performed to complete upgrade of the smart contract.

Abstract: The present disclosure provides a permission-controlled smart contract upgrade method based on a smart contract. The method first deploys a contract upgrade smart contract, and then deploys a smart contract to be upgraded including information of contract participants and information of a required minimum number of agreements on passing a proposal related to the contract. Then any of the blockchain nodes receives a contract upgrade proposal submitted by a user to the contract upgrade smart contract, the contract upgrade proposal carrying an address of the smart contract to be upgraded and binary information of a new contract. After the contract upgrade smart contract determines to pass the proposal, a proposing event is generated and then is forwarded to each user client participating in the contract. After the client receives the proposing event, the client receives user's vote and feeds it back to the contract upgrade smart contract.

Abstract: Provided is a permission-controlled smart contract upgrade method. The method deploys a contract upgrade smart contract, and deploys a smart contract to be upgraded including information of contract participants and a required minimum number of agreements on passing a proposal related to the contract. Any of the blockchain nodes receives a contract upgrade proposal submitted by user to the smart contract, the proposal carrying address of the contract to be upgraded and binary information of a new contract. After the smart contract determines to pass the proposal, a proposing event is generated and forwarded to each user client participating in the contract. After the client receives the event, the client receives user's vote and feeds back to the smart contract. If the number of agreements exceeds the required minimum number, the proposal is passed and employed, and a binary replacement is performed to complete upgrade of the smart contract.

Abstract: Techniques are provided herein for utilizing an inventory engine to optimize the selection of a set of items to be stored as inventory at a storage location. A candidate set of items may be identified based at least in part on a selection model. In accordance with at least one embodiment, the selection model may be based at least in part on a capacity of the storage location and a threshold time duration by which purchased items of the set of items are to be transported from the storage location to a purchaser. A plurality of probability values corresponding to the candidate set of items may be determined. An optimal set of items may be determined based at least in part on the candidate set of items and the plurality of probability values.