From 428b16c9a554eee6643baf9ac8d9b66c8b0857bb Mon Sep 17 00:00:00 2001
From: John Letey <john@noble.xyz>
Date: Fri, 20 Feb 2026 15:54:03 +0100
Subject: [PATCH] feat: add `FeeToken` interface

---
 src/FeeToken.sol | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 src/FeeToken.sol

diff --git a/src/FeeToken.sol b/src/FeeToken.sol
new file mode 100644
index 0000000..c91beaf
--- /dev/null
+++ b/src/FeeToken.sol
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity >=0.8.13 <0.9.0;
+
+/// @title FeeToken
+/// @author NASD Inc.
+/// @notice An interface that must be implemented by any ERC20 that wants to be a supported fee token on Noble.
+interface FeeToken {
+    /// @notice Allows the system address to transfer tokens from one address to another.
+    function systemTransfer(address from, address to, uint256 amount) external returns (bool);
+}