reword event handling

src/keeper/ContractHandler.ts

@@ -1,4 +1,4 @@
-import Contract from "web3"
+import {Contract} from "web3-utils"
 import Logger from "../utils/Logger"
 import Web3Helper from "./Web3Helper"
 

src/keeper/ContractWrapperBase.ts

@@ -1,4 +1,5 @@
 import Config from "../models/Config"
+import Logger from "../utils/Logger"
 import ContractHandler from "./ContractHandler"
 import Web3Helper from "./Web3Helper"
 
@@ -16,6 +17,37 @@ export default class ContractWrapperBase {
         this.web3Helper = web3Helper
     }
 
+    public async listenToEventOnce(eventName: string, options: any): Promise<any> {
+        return new Promise<any>((resolve, reject) => {
+            if (!this.contract.events[eventName]) {
+                throw new Error(`Event ${eventName} not found on contract ${this.contractName}`)
+            }
+            this.contract.once(eventName, options, (error: any, eventData: any) => {
+                if (error) {
+                    Logger.log(`Error in keeper ${eventName} event: `, error)
+                    return reject(error)
+                }
+                resolve(eventData)
+            })
+        })
+    }
+
+    public async getEventData(eventName: any, options: any): Promise<any[]> {
+        return new Promise<any>((resolve, reject) => {
+            if (!this.contract.events[eventName]) {
+                throw new Error(`Event ${eventName} not found on contract ${this.contractName}`)
+            }
+            this.contract.events[eventName](options)
+                .on("data", (eventData: any[]) => {
+                    Logger.log(eventData)
+                    resolve(eventData)
+                })
+                .on("error", (error) => {
+                    return reject(error)
+                })
+        })
+    }
+
     public async init() {
         this.contract = await ContractHandler.get(this.contractName, this.web3Helper)
     }
@@ -24,10 +56,4 @@ export default class ContractWrapperBase {
         return this.contract.address
     }
 
-    public getEvent(name: string) {
-        if (!this.contract.events[name]) {
-            throw new Error(`Event ${name} not found on contract ${this.contractName}`)
-        }
-        return this.contract.events[name]
-    }
 }

src/keeper/EventListener.ts

@@ -1,30 +0,0 @@
-import Logger from "../utils/Logger"
-
-export default class EventListener {
-
-    public static async listenOnce(event: any, eventName: string): Promise<any> {
-        return new Promise<any>((resolve, reject) => {
-            event.watch((error: any, result: any) => {
-                event.stopWatching()
-                if (error) {
-                    Logger.log(`Error in keeper ${eventName} event: `, error)
-                    return reject(error)
-                }
-                resolve(result)
-            })
-        })
-    }
-
-    public static getEvents(event: any): Promise<any[]> {
-        return new Promise<any>((resolve, reject) => {
-            event.get((error: any, logs: any[]) => {
-                if (error) {
-                    reject(error)
-                    throw new Error(error)
-                } else {
-                    resolve(logs)
-                }
-            })
-        })
-    }
-}

src/keeper/Web3Helper.ts

@@ -1,5 +1,9 @@
-import Web3 = require("web3")
+import * as Web3 from "web3"
+import * as web3pkg from "../../node_modules/web3/package.json"
 import Config from "../models/Config"
+import Logger from "../utils/Logger"
+
+Logger.log(web3pkg.version)
 
 export default class Web3Helper {
 
@@ -7,7 +11,7 @@ export default class Web3Helper {
 
     public constructor(config: Config) {
         const web3Provider = config.web3Provider || new Web3.providers.HttpProvider(config.nodeUri)
-        this.web3 = new Web3(web3Provider)
+        this.web3 = new Web3(Web3.givenProvider || web3Provider)
     }
 
     public getWeb3() {

src/ocean/Order.ts

@@ -2,7 +2,6 @@ import * as EthCrypto from "eth-crypto"
 import EthEcies from "eth-ecies"
 import * as EthjsUtil from "ethereumjs-util"
 import JWT from "jsonwebtoken"
-import EventListener from "../keeper/EventListener"
 import Keeper from "../keeper/Keeper"
 import Asset from "../models/Asset"
 import OrderModel from "../models/Order"
@@ -34,16 +33,18 @@ export default class Order {
 
     public async getOrdersByConsumer(consumerAddress: string) {
         const {auth, market} = this.keeper
-        const accessConsentEvent = auth.getEvent("AccessConsentRequested")({
+
+        const accessConsentRequestedData = await auth.getEventData("AccessConsentRequested", {
+            filter: {
                 _consumer: consumerAddress,
-        }, {
+            },
             fromBlock: 0,
-            toBlock: "latest",
         })
 
-        const events = await EventListener.getEvents(accessConsentEvent)
+        Logger.log("wai", accessConsentRequestedData)
 
-        const orders = await Promise.all(events
+        const orders = await Promise.all(
+            accessConsentRequestedData
                 .filter((event: any) => (event.args._consumer === consumerAddress))
                 .map(async (event: any) => ({
                             ...event.args,
@@ -51,7 +52,11 @@ export default class Order {
                             status: await auth.getOrderStatus(event.args._id),
                             paid: await market.verifyOrderPayment(event.args._id),
                             key: null,
-            } as Order)))
+                        } as Order
+                    ),
+                ),
+        )
+
         Logger.log("Got orders: ", orders)
         return orders
     }
@@ -81,36 +86,33 @@ export default class Order {
         } catch (err) {
             Logger.log("initiateAccessRequest", err)
         }
-        const resourceFilter = {
+
+        let order: OrderModel
+        const finalOrder: OrderModel = await auth.listenToEventOnce(
+            "AccessConsentRequested", {
+                filter: {
                     _resourceId: asset.assetId,
                     _consumer: buyerAddress,
-        }
-        // todo: Event - implement proper eventing
-        const accessConsentRequestedEvent = auth.getEvent("AccessConsentRequested")(resourceFilter)
-        let order: OrderModel
-        const finalOrder: OrderModel = await EventListener.listenOnce(
-            accessConsentRequestedEvent,
-            "AccessConsentRequested")
+                },
+            })
             .then((accessConsentRequestedResult) => {
                 order = Order.create(asset, accessConsentRequestedResult.args, key)
-                const requestIdFilter = {
-                    _id: order.id,
-                }
-                // todo: Event - implement proper eventing
-                const accessCommittedEvent = auth.getEvent("AccessRequestCommitted")(requestIdFilter)
 
-                return EventListener.listenOnce(accessCommittedEvent, "AccessRequestCommitted")
+                return auth.listenToEventOnce("AccessRequestCommitted", {
+                    filter: {
+                        _id: order.id,
+                    },
+                })
             })
             .then((accessRequestCommittedResult) => {
                 return this.payAsset(asset, accessRequestCommittedResult.args, order, buyerAddress)
             })
             .then(() => {
-                const requestIdFilter = {
+                return auth.listenToEventOnce("EncryptedTokenPublished", {
+                    filter: {
                         _id: order.id,
-                }
-                // todo: Event - implement proper eventing
-                const tokenPublishedEvent = auth.getEvent("EncryptedTokenPublished")(requestIdFilter)
-                return EventListener.listenOnce(tokenPublishedEvent, "EncryptedTokenPublished")
+                    },
+                })
             })
             .then((result) => {
                 return this.finalizePurchaseAsset(