test(genesis): cover mixed-case native fiat token minters

Author: pawansatoshi

tests/unit/native-fiat-token-genesis-validation.test.ts

@@ -0,0 +1,37 @@
+// Copyright 2026 Circle Internet Group, Inc. All rights reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+
+import { expect } from 'chai'
+import { schemaNativeFiatToken } from '../../scripts/genesis/NativeFiatToken'
+
+const PROXY_ADMIN = '0x1111111111111111111111111111111111111111'
+const OWNER = '0x2222222222222222222222222222222222222222'
+const PAUSER = '0x3333333333333333333333333333333333333333'
+const BLACKLISTER = '0x4444444444444444444444444444444444444444'
+const MASTER_MINTER = '0x5555555555555555555555555555555555555555'
+const RESCUER = '0x6666666666666666666666666666666666666666'
+
+const configWithMinters = (minters: Array<{ address: string; allowance: bigint }>) => ({
+  proxy: { admin: PROXY_ADMIN },
+  owner: OWNER,
+  pauser: PAUSER,
+  blacklister: BLACKLISTER,
+  masterMinter: MASTER_MINTER,
+  rescuer: RESCUER,
+  minters,
+})
+
+describe('NativeFiatToken genesis validation', () => {
+  it('rejects duplicate minters when address casing differs', () => {
+    const minter = '0xAb00000000000000000000000000000000000001'
+    const result = schemaNativeFiatToken.safeParse(
+      configWithMinters([
+        { address: minter, allowance: 100n },
+        { address: minter.toLowerCase(), allowance: 200n },
+      ]),
+    )
+
+    expect(result.success).to.be.false
+  })
+})