From b8df000c8f0ccd252b6049ac5a32a986d5a8e08d Mon Sep 17 00:00:00 2001
From: Richard Moore <github@ricmoo.com>
Date: Sat, 17 Apr 2021 18:10:27 -0400
Subject: [PATCH] Added better error detection when pre-EIP-155 transactions
 are disabled.

---
 packages/providers/src.ts/json-rpc-provider.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/providers/src.ts/json-rpc-provider.ts b/packages/providers/src.ts/json-rpc-provider.ts
index 1b801da81..b6d76955a 100644
--- a/packages/providers/src.ts/json-rpc-provider.ts
+++ b/packages/providers/src.ts/json-rpc-provider.ts
@@ -65,6 +65,13 @@ function checkError(method: string, error: any, params: any): any {
         });
     }
 
+    // "replacement transaction underpriced"
+    if (message.match(/only replay-protected/)) {
+        logger.throwError("legacy pre-eip-155 transactions not supported", Logger.errors.UNSUPPORTED_OPERATION, {
+            error, method, transaction
+        });
+    }
+
     if (errorGas.indexOf(method) >= 0 && message.match(/gas required exceeds allowance|always failing transaction|execution reverted/)) {
         logger.throwError("cannot estimate gas; transaction may fail or may require manual gas limit", Logger.errors.UNPREDICTABLE_GAS_LIMIT, {
             error, method, transaction