callback fixes (with codacy)

lib/thinx/transfer.js

@@ -379,15 +379,15 @@ module.exports = class Transfer {
 
 	}
 
-	save_dtid(tid, keys, ac) {
-		this.redis.set(tid, JSON.stringify(keys));
+	async save_dtid(tid, keys, ac) {
+		await this.redis.set(tid, JSON.stringify(keys));
 		console.log(`🔨 [debug] [transfer] Accepted udids ${keys.udids}`);
 		if (keys.udids.length > 1) {
 			ac(true, "transfer_partially_completed");
-			this.redis.expire(tid, 3600); // 3600 seconds expiration for this transfer request; should be possibly more (like 72h to pass weekends)
+			await this.redis.expire(tid, 3600); // 3600 seconds expiration for this transfer request; should be possibly more (like 72h to pass weekends)
 		} else {
 			ac(true, "transfer_completed");
-			this.redis.del(tid);
+			await this.redis.del(tid);
 		}
 	}
 
@@ -491,8 +491,9 @@ module.exports = class Transfer {
 			promises.push(result);
 		}
 
-		Promise.all(promises).then(() => {
-			this.save_dtid(dtid, json_keys, accept_callback);
+		Promise.all(promises).then(async () => {
+			await this.save_dtid(dtid, json_keys);
+			Promise.resolve(true);
 		}).catch(e => console.log("[transfer] promise exception", e));
 	}
 
@@ -579,7 +580,7 @@ module.exports = class Transfer {
 		}
 
 		// Store remaining (not declined) keys
-		await this.storeRemainingKeys(dtid, json_keys, callback);
+		await this.storeRemainingKeys(dtid, json_keys);
 
 		Promise.resolve("decline_completed");
 	}