Parameters

[Ramarti]

Refactors to run parameter verifiers:

Instead of having several arrays of parameters, like mintParamVerifiers, transferParamVerifiers, etc, we have 1 array of parameters, since we can't affirm that a parameter wont have to check only process in the life cycle.

We store them in a mapping by name in the framework, since some parameters have to check other parameters potentially.

Every parameter must implement IParameterVerifier, but they can chose if they implement IMintParamVerifier, ILinkParamVerifier... they will be called if they are included in the policy, when they are needed, thanks to ERC165. If the parameter doesn't implement those interfaces, it's a purely "data" parameter, where we can just set the value. TODO: compatibility checks for those

Since in UML there are complex parameters that depend on one another, I simplified the implementation with:

• commercialUse and derivatives are now bool flags on Policy
• now, when adding a creating a Policy, we can check if it makes sense to add certain sub parameters (for example, if derivatives is false, do not add Derivatives-With-Approval, if commercial is false, do not add revenue share related params). We move complexity from parameter verification to policy creation

struct Policy {
        /// True if the policy accepts commercial terms
        bool commercialUse;
        /// True if the policy accepts derivative-related terms
        bool derivatives;
        /// Id of a Licensing Framework
        uint256 frameworkId;
        /// Names of the parameters of the framework. Must be the same that IParamVerifier.name() returns
        bytes32[] paramNames;
        /// Values for the parameters of the framework. Index must correspond to paramNames[]
        bytes[] paramValues;
}

We also simplify licensing by allowing only 1 licensor per LNFT

[jdubpark]

If verifier.name() overlaps, then one verifier will get overridden. We should use more unique ID, e.g. chainId + address + name.

[LeoHChen]

why check-in code with everything commented out? can you leave those code in your local branch?

[LeoHChen]

linting please