better logic for when to start the miner

js/stratum-client.js

 	constructor(ip, port, miner) {
 		this.name = ip+":"+port;
 
-		this.waitFor = 2;
+		this.nounceReady = false;
+		this.difficultyReady = false;
 		this.miner = miner;
 		this.rpc = new RPCConn(ip, port);
 	}
 	}
 
 	async startWork() {
+		if (!this.work)
+			return;
+
 		this.log("Starting work", this.work.id);
 		var res;
 		try {
 				merkleBranch: params[4], version: params[5],
 				nBits: params[6], nTime: params[7], cleanJobs: params[8],
 			};
+			this.log("Got work", work.id);
 
 			this.work = work;
-			if (this.ready <= 0)
+			if (this.difficultyReady && this.nounceReady)
 				this.startWork();
 		});
 		this.rpc.on("mining.set_difficulty", params => {
-			this.log("difficulty", params[0]);
+			this.log("Got difficulty", params[0]);
 			this.miner.setDifficulty(params[0]);
 
-			if (--this.waitFor == 0)
+			if (this.difficultyReady)
+				return;
+
+			this.difficultyReady = true;
+			if (this.nounceReady)
 				this.startWork();
 		});
 
 		var sub = await this.rpc.call("mining.subscribe");
 		this.log("Got nounce", sub[1]);
 		this.miner.setNounce(sub[1], sub[2]);
-		if (--this.waitFor == 0)
+		this.nounceReady = true;
+		if (this.difficultyReady)
 			this.startWork();
 	}