feat: replace decodeBlindWatermark with decode

Author: zhensherlock

.changeset/sour-steaks-turn.md

@@ -0,0 +1,5 @@
+---
+'@watermark-design/node': patch
+---
+
+replace **decodeBlindWatermark** with **decode**

packages/node/README.md

@@ -14,15 +14,26 @@
 
 # `@watermark-design/node`
 
-The utils used internally by the Watermark Design. It includes common type checking, error assertions, component types/declarations/parameters, and more.
-
 ## Installing
 
 ```bash
 # or pnpm or yarn
 npm install @watermark-design/node
 ```
 
+## Usage
+
+```ts
+import * as watermark from '@watermark-design/node';
+watermark.blind
+  .decode({
+    url: 'https://cdn.jsdelivr.net/gh/zhensherlock/oss@main/uPic/blind-watermark-test-bxEJgQ.png',
+  })
+  .then((res) => {
+    console.log(res); // image base64 after decryption
+  });
+```
+
 ## Documentation
 
 To learn more, check [its documentation](https://watermark-design.github.io/watermark/).

packages/node/src/blind.ts

@@ -1,14 +1,14 @@
-import { createCanvas, loadImage } from 'canvas';
+import { createCanvas, GlobalCompositeOperation, loadImage } from 'canvas';
 import fetch from 'node-fetch';
 
 export interface DecodeBlindWatermarkOptions {
   url: string;
-  fillColor: string;
-  compositeOperation: string;
-  mode: string;
+  fillColor?: string;
+  compositeOperation?: string;
+  mode?: string;
 }
 
-export const decodeBlindWatermark = async (props: DecodeBlindWatermarkOptions) => {
+export const decode = async (props: DecodeBlindWatermarkOptions) => {
   const options = Object.assign(
     {
       url: '',
@@ -28,7 +28,7 @@ export const decodeBlindWatermark = async (props: DecodeBlindWatermarkOptions) =
     const canvas = createCanvas(img.width, img.height);
     const ctx = canvas.getContext('2d');
     ctx.drawImage(img, 0, 0, img.width, img.height);
-    ctx.globalCompositeOperation = options.compositeOperation as any;
+    ctx.globalCompositeOperation = options.compositeOperation as GlobalCompositeOperation;
     ctx.fillStyle = options.fillColor;
     ctx.fillRect(0, 0, img.width, img.height);
     resultImage = canvas.toDataURL();