fix: Node socket hangup error (#293)

Increase timeout of this request to 10 minutes
Specify this value should be decreased for PROT-187 (cache implementation)
Add a note in README for the latency

Author: lumtis

packages/request-node/README.md

@@ -94,6 +94,12 @@ curl -i "http://localhost:3000/getTransactionsByTopic?topic=topicExample"
 | 422  | The input fields of the request are incorrect              |
 | 500  | The getTransactionsByTopic operation from DataAccess fails |
 
+##### Note
+
+Since the Node doesn't implement a cache yet, all transactions have to be retrieved directly on IPFS.
+As a consequence, this request can take a long time if the topic requested indexes many transactions.
+This delay will be optimized with the implementation of a cache.
+
 ## Deployment
 
 A Node can be deployed by anyone. Users interested by running their own node can do it with the following instructions:

packages/request-node/src/request/getTransactionsByTopic.ts

@@ -1,6 +1,8 @@
 import { DataAccess } from '@requestnetwork/data-access';
 import * as httpStatus from 'http-status-codes';
 
+const REQUEST_TIMEOUT: number = 600000;
+
 /**
  * Action to handle getTransactionsByTopic of data-access layer.
  */
@@ -13,6 +15,11 @@ export default {
     // Retrieves data access layer
     let transactions;
 
+    // As the Node doesn't implement a cache, all transactions have to be retrieved directly on IPFS
+    // This operation can take a long time and then the timeout of the request should be increase
+    // PROT-187: Decrease or remove this value
+    clientRequest.setTimeout(REQUEST_TIMEOUT);
+
     // Server accept json message
     clientRequest.accepts('json');