Alchemy returns HTTP 420

tradingstrategy-ai · Mar 27, 2024 · 4317ed0 · 4317ed0
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -4,6 +4,7 @@
   node.js, hardhat and node-gyp were un-co-operative. Instead, now we just flatten out Enzyme sol
   files and store them in the source tree as copies.
 - Improved error messages for `GuardV0`
+- Handle HTTP 520 retryable, as returned by Alchemy JSON-RPC 
 
 # 0.25.3
 

diff --git a/contracts/terms-of-service b/contracts/terms-of-service
diff --git a/eth_defi/middleware.py b/eth_defi/middleware.py
@@ -76,6 +76,7 @@
     503,
     504,
     525,  # Returned by Alchemy - SSL handshake failed - cause unknown, internal Alchemy failure suspected https://http.dev/525
+    520,  # Returned by Alchemy - CloudFlare: Unknown error
 )
 
 #: List of ValueError status codes we know we might want to retry after a timeout