Merge pull request #4529 from NomicFoundation/sourcify-is-verified-bug

Normalize input addresses to lowercase for comparison

Author: schaable

.changeset/real-coins-tease.md

@@ -0,0 +1,5 @@
+---
+"@nomicfoundation/hardhat-verify": patch
+---
+
+Fixed case-sensitive address comparison for detecting verified contracts

packages/hardhat-verify/src/internal/solc/artifacts.ts

@@ -368,7 +368,7 @@ function mergeLibraries(
       ) {
         const detectedAddress = detectedLibraries[sourceName][libraryName];
         // Our detection logic encodes bytes into lowercase hex.
-        if (libraryAddress.toLowerCase() !== detectedAddress) {
+        if (libraryAddress.toLowerCase() !== detectedAddress.toLowerCase()) {
           conflicts.push({
             library: `${sourceName}:${libraryName}`,
             detectedAddress,

packages/hardhat-verify/src/internal/sourcify.ts

@@ -43,7 +43,9 @@ export class Sourcify {
         throw new Error(`Unexpected response body: ${JSON.stringify(json)}`);
       }
 
-      const contract = json.find((match) => match.address === address);
+      const contract = json.find(
+        (match) => match.address.toLowerCase() === address.toLowerCase()
+      );
       if (contract === undefined) {
         return false;
       }