Smart Contracts' architecture and security This work item establishes the architectural and functional specifications of smart contracts. Additionally, highlight the potential threats and specify the solutions to mitigate them. Requirements on the use of the Technology for Smart contracts, governance, purpose, motivation and security. 1)Specify architectural requirements on Blockchain technologies 2)Specify functional requirements 3)Identify potential threats and specify the mitigation 4)Specify mitigation strategies 5)Specify the Auditability and its strategy.