From 6726b055f3b187dd38729ce25ae02d5b97dab101 Mon Sep 17 00:00:00 2001
From: Stephen Buttolph <stephen@avalabs.org>
Date: Mon, 5 Jan 2026 12:32:37 -0500
Subject: [PATCH] fix: do not expose eth_close from the FilterAPI (#256)

## Why this should be merged

Currently, `eth_close` is being registered as an available RPC due to
`Close` being an exported function on the `FilterAPI`.

## How this works

Converts the method to a function that takes in the API.

## How this was tested

Updated unit test.
---
 eth/filters/api.libevm.go      | 6 ++++--
 eth/filters/api.libevm_test.go | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/eth/filters/api.libevm.go b/eth/filters/api.libevm.go
index dff4f52ea6..71730188b4 100644
--- a/eth/filters/api.libevm.go
+++ b/eth/filters/api.libevm.go
@@ -16,7 +16,9 @@
 
 package filters
 
-// Close releases resources held by the API.
-func (api *FilterAPI) Close() {
+// CloseAPI releases resources held by the API.
+//
+// This is not implemented as a method to avoid exposing it via RPC.
+func CloseAPI(api *FilterAPI) {
 	close(api.quit)
 }
diff --git a/eth/filters/api.libevm_test.go b/eth/filters/api.libevm_test.go
index c18134ac01..a372c4405f 100644
--- a/eth/filters/api.libevm_test.go
+++ b/eth/filters/api.libevm_test.go
@@ -53,5 +53,5 @@ func TestClose(t *testing.T) {
 	defer backend.Close()
 	sys := NewFilterSystem(backend, Config{})
 	api := NewFilterAPI(sys, false)
-	api.Close()
+	CloseAPI(api)
 }