diff --git a/src/laana-v0.1.2/index.ts b/src/laana-v0.1.2/index.ts
index d4e500a8..0665acab 100644
--- a/src/laana-v0.1.2/index.ts
+++ b/src/laana-v0.1.2/index.ts
@@ -1,7 +1,14 @@
 import { InstanceContext, NapCatCore } from '@/core';
 import { NapCatPathWrapper } from '@/common/path';
+import { LaanaFileUtils } from '@/laana-v0.1.2/utils/file';
+import { LaanaMessageUtils } from '@/laana-v0.1.2/utils/message';
 
 export class NapCatLaanaAdapter {
+    utils = {
+        msg: new LaanaMessageUtils(this.core, this),
+        file: new LaanaFileUtils(this.core, this),
+    };
+
     constructor(
         public core: NapCatCore,
         public context: InstanceContext,
diff --git a/src/laana-v0.1.2/utils/file.ts b/src/laana-v0.1.2/utils/file.ts
new file mode 100644
index 00000000..e896b04d
--- /dev/null
+++ b/src/laana-v0.1.2/utils/file.ts
@@ -0,0 +1,51 @@
+import { NapCatCore } from '@/core';
+import { NapCatLaanaAdapter } from '..';
+import { File as LaanaFile } from '@/laana-v0.1.2/types/entity/file';
+import path from 'path';
+import fs from 'fs';
+import fsPromises from 'fs/promises';
+import { httpDownload } from '@/common/file';
+import { randomUUID } from 'crypto';
+
+export class LaanaFileUtils {
+    cacheDir = path.join(this.laana.pathWrapper.cachePath, 'laana');
+
+    constructor(
+        public core: NapCatCore,
+        public laana: NapCatLaanaAdapter,
+    ) {
+    }
+
+    async resolveCacheIdFromLaanaFile(laanaFile: LaanaFile) {
+        if (laanaFile.uri.oneofKind === 'cacheId') {
+            const cacheFilePath = path.join(this.cacheDir, laanaFile.uri.cacheId);
+            if (!fs.existsSync(cacheFilePath)) {
+                throw `请求的缓存不存在: ${laanaFile.uri.cacheId}`;
+            }
+            return laanaFile.uri.cacheId;
+        } else if (laanaFile.uri.oneofKind === 'url') {
+            return this.createCacheFromUrl(laanaFile.uri.url);
+        } else if (laanaFile.uri.oneofKind === 'raw') {
+            return this.createCacheFromBytes(laanaFile.uri.raw);
+        } else {
+            throw '不支持的缓存类型';
+        }
+    }
+
+    toLocalPath(cacheId: string) {
+        return path.join(this.cacheDir, cacheId);
+    }
+
+    async createCacheFromBytes(bytes: Uint8Array) {
+        let cacheId = randomUUID();
+        while (fs.existsSync(cacheId)) {
+            cacheId = randomUUID();
+        }
+        await fsPromises.writeFile(path.join(this.cacheDir, cacheId), bytes);
+        return cacheId;
+    }
+
+    async createCacheFromUrl(url: string) {
+        return this.createCacheFromBytes(await httpDownload({ url }));
+    }
+}
diff --git a/src/laana-v0.1.2/utils/message.ts b/src/laana-v0.1.2/utils/message.ts
index 80d31ffe..a3367904 100644
--- a/src/laana-v0.1.2/utils/message.ts
+++ b/src/laana-v0.1.2/utils/message.ts
@@ -13,7 +13,7 @@ type Laana2RawConverters = {
         params: SendMessagePing,
     ) => PromiseLike<{
         elements: SendMessageElement[],
-        fileCacheId?: string[],
+        fileCacheIds: string[],
     }>
 }
 
@@ -40,7 +40,8 @@ export class LaanaMessageUtils {
                 };
             }
 
-            const sendElements: SendMessageElement[] = [];
+            const elements: SendMessageElement[] = [];
+            const fileCacheIds: string[] = [];
 
             if (msgContent.repliedMsgId) {
                 const { msgSeq, msgId, senderUin } = (
@@ -49,7 +50,7 @@ export class LaanaMessageUtils {
                         [msgContent.repliedMsgId]
                     )
                 ).msgList[0];
-                sendElements.push({
+                elements.push({
                     elementType: ElementType.REPLY,
                     elementId: '',
                     replyElement: {
@@ -64,7 +65,7 @@ export class LaanaMessageUtils {
             for (const seg of msgContent.segments) {
                 const content = seg.content;
                 if (content.oneofKind === 'text') {
-                    sendElements.push({
+                    elements.push({
                         elementType: ElementType.TEXT,
                         elementId: '',
                         textElement: {
@@ -81,7 +82,7 @@ export class LaanaMessageUtils {
                     }
 
                     if (content.at.uin === '0') {
-                        sendElements.push(at(
+                        elements.push(at(
                             '0', '0',
                             AtType.atAll,
                             '所有人',
@@ -91,7 +92,7 @@ export class LaanaMessageUtils {
                     const atMember = await this.core.apis.GroupApi
                         .getGroupMember(params.targetPeer.uin, content.at.uin);
                     if (atMember) {
-                        sendElements.push(at(
+                        elements.push(at(
                             content.at.uin,
                             atMember.uid,
                             AtType.atUser,
@@ -103,7 +104,7 @@ export class LaanaMessageUtils {
                             throw '查询用户 UID 失败';
                         }
                         const info = await this.core.apis.UserApi.getUserDetailInfo(uid);
-                        sendElements.push(at(
+                        elements.push(at(
                             content.at.uin,
                             uid,
                             AtType.atUser,
@@ -122,7 +123,7 @@ export class LaanaMessageUtils {
                     const faceType = parsedFaceId >= 222 ?
                         face.AniStickerType ?
                             3 : 2 : 1;
-                    sendElements.push({
+                    elements.push({
                         elementType: ElementType.FACE,
                         elementId: '',
                         faceElement: {
@@ -136,14 +137,17 @@ export class LaanaMessageUtils {
                         },
                     });
                 } else if (content.oneofKind === 'image') {
-                    // TODO: handle file-like messages
-                    throw 'Unimplemented';
+                    const cacheId = await this.laana.utils.file.resolveCacheIdFromLaanaFile(content.image);
+                    elements.push(await this.core.apis.FileApi.createValidSendPicElement(
+                        this.laana.utils.file.toLocalPath(cacheId)
+                    ));
+                    fileCacheIds.push(cacheId);
                 } else {
                     throw '未知的消息内容类型';
                 }
             }
 
-            return { elements: sendElements };
+            return { elements, fileCacheIds };
         },
 
         file: () => { throw 'Unimplemented'; },
@@ -160,6 +164,7 @@ export class LaanaMessageUtils {
                     faceName: msgContent.displayText ?? '[商城表情]',
                 },
             }],
+            fileCacheIds: [],
         }),
 
         video: () => { throw 'Unimplemented'; },