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serverless-software-license's Issues

Realize ILicenseStorage interface for file system

  • Create a class called FileLicenseStorage that implements the ILicenseStorage interface (see interfaces/manager.ts) by writing and reading the License object to and from disk.

  • The class should accept a path at which the file is stored.

  • Please create a new folder for this class called storage in the src/lib directory.

  • Create a test case verifying that the getLicense method throws if the disk contents don't match a License.

  • Create a test case verifying that the setLicense method throws if the contents to be written don't match a License.

  • Create a test case verifying that the contents written to disk match those retrieved.

Implement two-step registration

  • Search for a cross-platform compatible webcrypto shim to generate random data in a new getRandomData utility function

  • Implement startRegister by:

  1. Checking it the address has a license according to the registry
  2. If above condition is true, continuing to generate a new address ownership challenge (leveraging new random data utility) and storing it in the private activeChallenge instance property
  • Implement completeRegister by:
  1. checking if the response fulfills the challenge (utilize verifyOwnership in util.ts)
  2. If above condition is true, continuing to write the license to storage, setting the private _isValid property to true, emitting a LicenseManagerEvent.LicenseValidityChanged event and resetting the activeChallenge property
  • Add a test case verifying that startRegister fails if the address has no license on the registry
  • Add a test case verifying that startRegister returns a random string if the address has a license
  • Add a test case verifying that completeRegister fails if the challenge response comes from a different address
  • Add a test case verifying that completeRegister emits a LicenseManagerEvent.LicenseValidityChanged event if the challenge response stems from the same address. Also, verify that the manager‘s public isValid property has been set to false

Implement license validity check

  • Implement the LicenseManager's checkValidity method by:
  1. checking if the license retrieved from storage passes the address ownership challenge (see verifyOwnership in src/lib/util.ts)
  2. checking if the address referenced in the license has a license according to the registry associated with the manager (see hasLicense in src/lib/LicenseRegistry.ts)
  3. setting the private _isValid property according to the conditions met
  4. emitting a LicenseManagerEvent.LicenseValidityChanged event if the _isValid property changed compared to before calling this method
  • Create a test case verifying that the isValid property returns a boolean in any case
  • Create a test case verifying that the isValid property returns true if the conditions above are met
  • Create a test case verifying that the isValid property returns false if any of the conditions above aren't met

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