update enforcer interface

[johannbarbie]

Bounty Description

interface used by client described here: https://docs.google.com/drawings/d/1WXcAvTEpXDGeL68MfWOP20mERht8rzqfSzdiFtYZeSc

Scope

contract IEnforcer {
  event Request(bytes32 indexed executionId, bytes32 codeHash, bytes32 dataHash);
  event Registered(bytes32 indexed executionId, uint256 challengeStartTime, bytes32 pathHash, bytes32 resultHash);

  function request(EVMParameters memory _params, bytes memory _data) public returns (bytes32);
  function getStatus(bytes32 _taskHash) public view returns (uint256, bytes32[] memory, bytes32[] memory)
  function register(bytes32 _executionId, bytes32 _pathHash, bytes32[] _resultProof) public; // first registered pathHash sets challengeStartTime for executionId
  function dispute(bytes32 _executionId, bytes32 _pathHash, bytes32[] _resultProof) public;
  function result(bytes32 _executionId, bytes32 _pathA, bytes32 _pathB, uint256 _result) public; // result: 1 = pathA invalid, 2 = pathB invalid, 3 = both invalid
}

Deliverables

• separate inteface file as above
• fix of enforcer code to match interface
• fix of current tests to pass

Gain for the project

• stable client interface

Roles

bounty gardener: @johannbarbie / 15%
bounty worker: @pinkiebell / 75%
bounty reviewer: @johannbarbie / 10%

[pinkiebell]

Kind of blocked by #134
Gonna need a redesign first. struct EVMParameters ? :)

[pinkiebell]

TODO:
enforcer needs a sense of

• ExecutionRequest
• ExecutionResult
• ExecutionChallenge

Also the enforcer should implement a execution request timeout so that we have a valid timeframe for a user-supplied time in request