From a6e128f5cc566d291b722cca1734ba41aae6c548 Mon Sep 17 00:00:00 2001
From: Richard Moore <github@ricmoo.com>
Date: Thu, 10 Jun 2021 17:47:17 -0400
Subject: [PATCH] Match Solidity identifier regex (#1657).

---
 packages/abi/src.ts/fragments.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/abi/src.ts/fragments.ts b/packages/abi/src.ts/fragments.ts
index d66ac601d..5feff220c 100644
--- a/packages/abi/src.ts/fragments.ts
+++ b/packages/abi/src.ts/fragments.ts
@@ -1029,7 +1029,8 @@ function verifyType(type: string): string {
     return type;
 }
 
-const regexIdentifier = new RegExp("^[A-Za-z_][A-Za-z0-9_]*$");
+// See: https://github.com/ethereum/solidity/blob/1f8f1a3db93a548d0555e3e14cfc55a10e25b60e/docs/grammar/SolidityLexer.g4#L234
+const regexIdentifier = new RegExp("^[a-zA-Z$_][a-zA-Z0-9$_]*$");
 function verifyIdentifier(value: string): string {
     if (!value || !value.match(regexIdentifier)) {
         logger.throwArgumentError(`invalid identifier "${ value }"`, "value", value);