Open-source proof-of-stake blockchain Hedera has announced an update to its smart contract service security model to reduce complexity while adding protection for developers and users. After July 11th, all contracts on Hedera will follow the new security model. According to Hedera, the new security model has been available to developers on Testnet since June 21, and has been applied to contracts created since version 0.35.2 of the mainnet. Hedera reminds developers to test applications with new contracts and user experiences using the new security model to avoid unintended consequences.