I would like to write an standard ("future ERC") with a set of rules to be respected by contracts implementing the standard. Such rules can include for example:

  • "public function A must emit event XYZ when some internal state is modified".
  • "public function B must throw if assertion over given execution state do not match".
  • ...

Problem: Are there any "good solidity patterns" to define such standard so that implementations can just reuse the Solidity code?

For example, a common programming pattern will be to define "light-weight interfaces" that implementations are forced to override, each interface defining cross-cutting concerns. This is a non-issue.

My doubt arise when trying to define more "dynamic execution conditions", for example force set of events to always be present or force a given event to be raised.

In standard OOP programming languages like Java I can force implementations to always inherit from a given base class and just children implement "hooks" (or life-cicle functions in code), so that the standard will be restricted to a given base-class implementation.

  • Will such approach (forcing to inherit from a well defined base class) be suitable for general ERCs specs?

  • Can modifiers in functions be present in the formal spec?

  • Are you aware of some other "magical" programming pattern that could help to formalize in solidity code the expected behavior?


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