The adoption of blockchain based distributed ledgers is growing
fast due to their ability to provide reliability, integrity, and auditability
without trusted entities. One of the key capabilities of these emerging
platforms is the ability to create self-enforcing smart contracts. However,
the development of smart contracts has proven to be error-prone in practice,
and as a result, contracts deployed on public platforms are often
riddled with security vulnerabilities. This issue is exacerbated by the design