chore: release v4.8.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "resend",
-  "version": "4.7.0",
+  "version": "4.8.0",
   "description": "Node.js library for the Resend API",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",

src/common/interfaces/email-api-options.interface.ts

@@ -1,6 +1,13 @@
-import type { Attachment } from '../../emails/interfaces/create-email-options.interface';
 import type { Tag } from '../../interfaces';
 
+export interface EmailApiAttachment {
+  content?: string | Buffer;
+  filename?: string | false | undefined;
+  path?: string;
+  content_type?: string;
+  inline_content_id?: string;
+}
+
 export interface EmailApiOptions {
   from: string;
   to: string | string[];
@@ -14,5 +21,5 @@ export interface EmailApiOptions {
   reply_to?: string | string[];
   scheduled_at?: string;
   tags?: Tag[];
-  attachments?: Attachment[];
+  attachments?: EmailApiAttachment[];
 }

src/common/utils/parse-email-to-api-options.ts

@@ -1,11 +1,26 @@
 import type { CreateEmailOptions } from '../../emails/interfaces/create-email-options.interface';
-import type { EmailApiOptions } from '../interfaces/email-api-options.interface';
+import type {
+  EmailApiAttachment,
+  EmailApiOptions,
+} from '../interfaces/email-api-options.interface';
+
+function parseAttachments(
+  attachments: CreateEmailOptions['attachments'],
+): EmailApiAttachment[] | undefined {
+  return attachments?.map((attachment) => ({
+    content: attachment.content,
+    filename: attachment.filename,
+    path: attachment.path,
+    content_type: attachment.contentType,
+    inline_content_id: attachment.inlineContentId,
+  }));
+}
 
 export function parseEmailToApiOptions(
   email: CreateEmailOptions,
 ): EmailApiOptions {
   return {
-    attachments: email.attachments,
+    attachments: parseAttachments(email.attachments),
     bcc: email.bcc,
     cc: email.cc,
     from: email.from,

src/emails/interfaces/create-email-options.interface.ts

@@ -120,6 +120,11 @@ export interface Attachment {
   path?: string;
   /** Optional content type for the attachment, if not set will be derived from the filename property */
   contentType?: string;
+  /**
+   * Optional content ID for the attachment, to be used as a reference in the HTML content.
+   * If set, this attachment will be sent as an inline attachment and you can reference it in the HTML content using the `cid:` prefix.
+   */
+  inlineContentId?: string;
 }
 
 export type Tag = {