refactor(resources): event listener is a util. Make Disputes and Noti…

…fications standalone classes.

src/constants/error.js

@@ -13,6 +13,8 @@ export const CONTRACT_NOT_DEPLOYED =
   'Unable to load contract. Are you sure the contract is deployed and you are on the right network?'
 export const UNABLE_TO_LOAD_CONTRACT =
   'Unable to load contract. Are you sure the contract artifact is correct?'
+export const MISSING_CONTRACT_PARAMETERS =
+  'Unable to load contract. Missing contractAddress or Artifact. Please call setContractInstance'
 
 // Implementation
 export const CONTRACT_INSTANCE_NOT_SET =
@@ -67,3 +69,12 @@ export const NO_STORE_PROVIDER_SPECIFIED =
 // Disputes
 export const NO_STORE_DATA_FOR_DISPUTE = account =>
   `Account ${account} does not have store data for dispute`
+
+// Notifications
+export const MISSING_STORE_PROVIDER =
+  'This method requires the use of an off chain store. Please call setStoreProviderInstance.'
+
+// Event Listener
+export const MISSING_CONTRACT_INSTANCE = contractAddress =>
+  `No contract instance stored for ${contractAddress}. Please call addContractInstance.`
+export const ERROR_FETCHING_EVENTS = error => `Unable to fetch events: ${error}`

src/contracts/ContractImplementation.js

@@ -126,6 +126,8 @@ class ContractImplementation {
       this._contractLoadedRejecter = reject
     })
 
+  // we have getters so that abstract classes can provide public access to implementations variables
+  getContractInstance = () => this.contractInstance
   getContractAddress = () => this.contractAddress
 }
 

src/kleros.js

@@ -2,8 +2,8 @@ import isRequired from './utils/isRequired'
 import Web3Wrapper from './utils/Web3Wrapper'
 import StoreProviderWrapper from './utils/StoreProviderWrapper'
 import * as contracts from './contracts'
-import * as resources from './resourceWrappers'
-// import EventListener from './eventListener'
+import * as resources from './resources'
+import EventListener from './utils/EventListener'
 
 class Kleros {
   web3Wrapper = {}
@@ -53,16 +53,15 @@ class Kleros {
       this.storeWrapper
     )
     // ARBITRABLE CONTRACTS
-    this.arbitrableContracts = new contracts.abstractions.ArbitrableContracts(
+    this.arbitrable = new contracts.abstractions.Arbitrable(
       _arbitrableTransaction,
       this.storeWrapper
     )
     // EVENT LISTENER
-    this.eventListener = new resources.EventListeners(
-      this.arbitrator,
-      this.arbitrableContracts,
-      this.storeWrapper
-    )
+    this.eventListener = new EventListener([
+      this.arbitrator._contractImplementation.contractInstance,
+      this.arbitrable._contractImplementation.contractInstance
+    ])
     // DISPUTES
     this.disputes = new resources.Disputes(
       this.arbitrator,