add toUint8Array

index.ts

 import { countItems } from './src/utils';
-import { Base64 } from 'js-base64';
+import { Base64, fromUint8Array } from 'js-base64';
 
 export default class YGOProDeck {
   main: number[] = [];
@@ -17,7 +17,7 @@ export default class YGOProDeck {
     return counted.reduce((a, b) => a + b.size * 4, 0);
   }
 
-  toEncodedString() {
+  toUint8Array() {
     const counted = [this.main, this.extra, this.side].map(countItems);
     const buf = new Uint8Array(counted.reduce((a, b) => a + b.size * 4, 0));
     let pointer = 0;
@@ -38,15 +38,18 @@ export default class YGOProDeck {
       }
     };
     counted.forEach(writeCards);
-    return Base64.fromUint8Array(buf, true);
+    return buf;
+  }
+
+  toEncodedString() {
+    return Base64.fromUint8Array(this.toUint8Array(), true);
   }
 
   toString() {
     return this.toEncodedString();
   }
 
-  fromEncodedString(str: string) {
-    const buf = Base64.toUint8Array(str);
+  fromUint8Array(buf: Uint8Array) {
     for (let i = 0; i < buf.length - 3; i += 4) {
       const value =
         buf[i] | (buf[i + 1] << 8) | (buf[i + 2] << 16) | (buf[i + 3] << 24);
@@ -62,6 +65,14 @@ export default class YGOProDeck {
     return this;
   }
 
+  static fromUint8Array(buf: Uint8Array) {
+    return new YGOProDeck().fromUint8Array(buf);
+  }
+
+  fromEncodedString(str: string) {
+    return this.fromUint8Array(Base64.toUint8Array(str));
+  }
+
   static fromEncodedString(str: string) { 
     return new YGOProDeck().fromEncodedString(str);
   }