Patent attributes
In some examples, a first node is able to communicate with one or more second nodes for participating in a consensus system. The first node may receive, from a computing device, a request to execute a first smart contract associated with a first blockchain. The first node may invoke execution of the first smart contract to cause the first smart contract to execute a transaction by reading at least a portion of transaction data from the first blockchain as a transaction result. Further, the first node may check whether a simulation indicator has been set, which indicates that an expiration time of the first smart contract has been reached. Based on determining that the first smart contract has the simulation indicator set, the first node refrains from writing the transaction result to the blockchain as a valid transaction result and sends the transaction result to the computing device.
