From 64afcc2344cf17d08f5373448b1903ffc45daaa2 Mon Sep 17 00:00:00 2001
From: Misato <misato@takahashi.name>
Date: Mon, 28 Jul 2025 20:56:23 +0900
Subject: [PATCH 1/3] add iconv support

---
 packages/types/tailor.d.ts | 37 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/packages/types/tailor.d.ts b/packages/types/tailor.d.ts
index 010e117..80c3c16 100644
--- a/packages/types/tailor.d.ts
+++ b/packages/types/tailor.d.ts
@@ -51,4 +51,39 @@ declare namespace tailor.secretmanager {
     vault: string,
     name: string
   ): Promise<string | undefined>;
-}
\ No newline at end of file
+}
+
+declare namespace tailor.iconv {
+  /**
+   * Convert string from one encoding to another
+   */
+  function convert(str: string | Uint8Array | ArrayBuffer, fromEncoding: string, toEncoding: string): string | Uint8Array;
+
+  /**
+   * Convert buffer from one encoding to another
+   */
+  function convertBuffer(buffer: Uint8Array | ArrayBuffer, fromEncoding: string, toEncoding: string): string | Uint8Array;
+
+  /**
+   * Decode buffer to string
+   */
+  function decode(buffer: Uint8Array | ArrayBuffer, encoding: string): string;
+
+  /**
+   * Encode string to buffer
+   */
+  function encode(str: string, encoding: string): Uint8Array;
+
+  /**
+   * Get list of supported encodings
+   */
+  function encodings(): string[];
+
+  /**
+   * Iconv class for compatibility with node-iconv
+   */
+  class Iconv {
+    constructor(fromEncoding: string, toEncoding: string);
+    convert(input: string | Uint8Array | ArrayBuffer): string | Uint8Array;
+  }
+}

From ebae2770c39919503acff7f60fe029ed700e4795 Mon Sep 17 00:00:00 2001
From: Misato <misato@takahashi.name>
Date: Thu, 31 Jul 2025 09:54:13 +0900
Subject: [PATCH 2/3] change version

---
 packages/types/package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/types/package.json b/packages/types/package.json
index 24b6d7a..ef45653 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailor-platform/function-types",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "TypeScript types for Tailor Platform Function service",
   "repository": {
     "type": "git",

From 4ce2b180af888c59afa4abefeff4604061bf2ca7 Mon Sep 17 00:00:00 2001
From: Misato <misato@takahashi.name>
Date: Thu, 31 Jul 2025 11:57:09 +0900
Subject: [PATCH 3/3] Chnage return type by encoding

---
 packages/types/tailor.d.ts | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/packages/types/tailor.d.ts b/packages/types/tailor.d.ts
index 80c3c16..3c7ba8a 100644
--- a/packages/types/tailor.d.ts
+++ b/packages/types/tailor.d.ts
@@ -57,22 +57,36 @@ declare namespace tailor.iconv {
   /**
    * Convert string from one encoding to another
    */
-  function convert(str: string | Uint8Array | ArrayBuffer, fromEncoding: string, toEncoding: string): string | Uint8Array;
+  function convert<T extends string>(
+    str: string | Uint8Array | ArrayBuffer,
+    fromEncoding: string,
+    toEncoding: T
+  ): T extends 'UTF8' | 'UTF-8' ? string : Uint8Array;
 
   /**
    * Convert buffer from one encoding to another
    */
-  function convertBuffer(buffer: Uint8Array | ArrayBuffer, fromEncoding: string, toEncoding: string): string | Uint8Array;
+  function convertBuffer<T extends string>(
+    buffer: Uint8Array | ArrayBuffer,
+    fromEncoding: string,
+    toEncoding: T
+  ): T extends 'UTF8' | 'UTF-8' ? string : Uint8Array;
 
   /**
    * Decode buffer to string
    */
-  function decode(buffer: Uint8Array | ArrayBuffer, encoding: string): string;
+  function decode<T extends string>(
+    buffer: Uint8Array | ArrayBuffer,
+    encoding: T
+  ): T extends 'UTF8' | 'UTF-8' ? string : Uint8Array;
 
   /**
    * Encode string to buffer
    */
-  function encode(str: string, encoding: string): Uint8Array;
+  function encode<T extends string>(
+    str: string,
+    encoding: T
+  ): T extends 'UTF8' | 'UTF-8' ? string : Uint8Array;
 
   /**
    * Get list of supported encodings