From 64f2ca696fa60df11e58dbd64a715ea0d07c7b7c Mon Sep 17 00:00:00 2001
From: Matthias Seitz <matthias.seitz@outlook.de>
Date: Fri, 10 Feb 2023 20:51:13 +0100
Subject: [PATCH] chore: add etherscan page not found error (#2126)

---
 ethers-etherscan/src/errors.rs | 2 ++
 ethers-etherscan/src/lib.rs    | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/ethers-etherscan/src/errors.rs b/ethers-etherscan/src/errors.rs
index f10920ba..f6cc587d 100644
--- a/ethers-etherscan/src/errors.rs
+++ b/ethers-etherscan/src/errors.rs
@@ -41,6 +41,8 @@ pub enum EtherscanError {
     BlockedByCloudflare,
     #[error("The Requested prompted a cloudflare captcha security challenge to review the security of your connection before proceeding.")]
     CloudFlareSecurityChallenge,
+    #[error("Received `Page not found` response. API server is likely down")]
+    PageNotFound,
 }
 
 /// etherscan/polyscan is protected by cloudflare, which can lead to html responses like `Sorry, you have been blocked` See also <https://community.cloudflare.com/t/sorry-you-have-been-blocked/110790>
diff --git a/ethers-etherscan/src/lib.rs b/ethers-etherscan/src/lib.rs
index b3fa1c6e..ee8437b6 100644
--- a/ethers-etherscan/src/lib.rs
+++ b/ethers-etherscan/src/lib.rs
@@ -207,7 +207,9 @@ impl Client {
         let res = res.as_ref();
         let res: ResponseData<T> = serde_json::from_str(res).map_err(|err| {
             error!(target: "etherscan", ?res, "Failed to deserialize response: {}", err);
-            if is_blocked_by_cloudflare_response(res) {
+            if res == "Page not found" {
+                EtherscanError::PageNotFound
+            } else if is_blocked_by_cloudflare_response(res) {
                 EtherscanError::BlockedByCloudflare
             } else if is_cloudflare_security_challenge(res) {
                 EtherscanError::CloudFlareSecurityChallenge