From: Ardis Lu <ardisglu@gmail.com>
Date: Fri, 5 Jun 2026 06:16:07 +0000 (-0700)
Subject: Check for `viaIR` Solidity prologue
X-Git-Url: https://git.ardis.lu/?a=commitdiff_plain;h=e64bb1ba42db2aa0ba6a30d227ebbdc31e269a38;p=solc-metadata

Check for `viaIR` Solidity prologue
---

diff --git a/index.js b/index.js
index 4c3024e..dbd3757 100644
--- a/index.js
+++ b/index.js
@@ -32,9 +32,11 @@ async function fetchBytecode(address, rpc) {
  */
 function detectLanguage(bytecode) {
   const prefix = bytecode.replace('0x', '').substring(0, 10);
+  const viaIRPrefix = bytecode.replace('0x', '').substring(0, 12);
 
   // https://github.com/banteg/erigon-kv/blob/5584ada83c75b244e611641d100ccc647a7f6791/examples/compilers.py#L17
-  if (prefix === '6060604052' || prefix === '6080604052') {
+  // viaIRPrefix happens when optimizer viaIR=true
+  if (prefix === '6060604052' || prefix === '6080604052' || viaIRPrefix === '608080604052') {
     return 'solidity';
   }
   else if (prefix === '6004361015' || prefix === '341561000a') {