From 5521ad4befbb7ceceda994fd9c3d1ddd8d27c578 Mon Sep 17 00:00:00 2001
From: Subarna Singh <subarnasingh11@gmail.com>
Date: Tue, 28 Jan 2025 18:21:54 +0530
Subject: [PATCH] Add error handling in TP/ICAP (#3627)

* Add error handling in TP/ICAP

* changeset

* add possible solutions

* Update README

* Updated changeset

* Changes based on comments

---------

Co-authored-by: app-token-issuer-data-feeds[bot] <134377064+app-token-issuer-data-feeds[bot]@users.noreply.github.com>
---
 .changeset/great-hornets-sneeze.md         |  6 ++++
 .changeset/rotten-llamas-pay.md            |  6 ++++
 packages/sources/icap/README.md            |  2 ++
 packages/sources/tp/src/transport/price.ts | 33 ++++++++++++++++++----
 4 files changed, 42 insertions(+), 5 deletions(-)
 create mode 100644 .changeset/great-hornets-sneeze.md
 create mode 100644 .changeset/rotten-llamas-pay.md

diff --git a/.changeset/great-hornets-sneeze.md b/.changeset/great-hornets-sneeze.md
new file mode 100644
index 0000000000..5f754d4194
--- /dev/null
+++ b/.changeset/great-hornets-sneeze.md
@@ -0,0 +1,6 @@
+---
+'@chainlink/icap-adapter': minor
+'@chainlink/tp-adapter': minor
+---
+
+Error Handling
diff --git a/.changeset/rotten-llamas-pay.md b/.changeset/rotten-llamas-pay.md
new file mode 100644
index 0000000000..5d90bdfe37
--- /dev/null
+++ b/.changeset/rotten-llamas-pay.md
@@ -0,0 +1,6 @@
+---
+'@chainlink/icap-adapter': patch
+'@chainlink/tp-adapter': patch
+---
+
+Add possible solutions to frequent errors
diff --git a/packages/sources/icap/README.md b/packages/sources/icap/README.md
index 538f19c450..1f3fbeb4b8 100644
--- a/packages/sources/icap/README.md
+++ b/packages/sources/icap/README.md
@@ -4,6 +4,8 @@
 
 This document was generated automatically. Please see [README Generator](../../scripts#readme-generator) for more info.
 
+This EA has been deprecated, use TP instead.
+
 ## Known Issues
 
 ### Concurrent connections
diff --git a/packages/sources/tp/src/transport/price.ts b/packages/sources/tp/src/transport/price.ts
index 5c0c7683bd..9004b470e6 100644
--- a/packages/sources/tp/src/transport/price.ts
+++ b/packages/sources/tp/src/transport/price.ts
@@ -51,11 +51,34 @@ export const generateTransport = () => {
 
         return new Promise((resolve) => {
           connection.addEventListener('message', (event: MessageEvent) => {
-            const { msg, sta } = JSON.parse(event.data.toString())
-            if (msg === 'auth' && sta === 1) {
-              logger.info('Got logged in response, connection is ready')
-              providerDataStreamEstablishedUnixMs = Date.now()
-              resolve()
+            const { msg, sta, info } = JSON.parse(event.data.toString())
+            if (msg === 'auth') {
+              if (sta === 1) {
+                logger.info('Got logged in response, connection is ready')
+                providerDataStreamEstablishedUnixMs = Date.now()
+                resolve()
+              } else if (sta === 0) {
+                if (
+                  info ===
+                  'Server requested disconnection (code 2): Client limits for JSONWS exceeded (2 clients, 1 allowed)'
+                ) {
+                  logger.error(`${info}
+                    You have too many concurrent connections.
+                    Possible Solutions:
+                    1. Shut off your active TP/ICAP EAs when performing the above tests.
+                    2. Use your supplied username for TP EA and your username appended with “-iis“ for ICAP EA.
+                    3. Do not deploy more than 2 EAs for TP/ICAP.
+                    4. If you are still unable to have more than 2 connection please contact Chainlink Labs.`)
+                } else if (info === 'Authentication failed (check credentials)') {
+                  logger.error(`${info}
+                    There is something wrong with credentials.
+                    Possible Solutions:
+                    1. Doublecheck your supplied credentials and that they are being correctly provided in the header.
+                    2. Contact Data Provider to ensure your subscription is active.
+                    3. If credentials are supplied under the node licensing agreement with Chainlink Labs, please contact us.`)
+                }
+                logger.error(`${info}`)
+              }
             }
           })
           const options = {