readd encode point function

torusresearch · Jul 11, 2024 · 4b98a63 · 4b98a63
1 parent 74e5536
commit 4b98a63
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/src/Point.ts b/src/Point.ts
@@ -15,6 +15,23 @@ class Point {
     this.y = new BN(y, "hex");
     this.ecCurve = ecCurve;
   }
+
+  encode(enc: string): Buffer {
+    switch (enc) {
+      case "arr":
+        return Buffer.concat([
+          Buffer.from("04", "hex"),
+          Buffer.from(this.x.toString("hex", 64), "hex"),
+          Buffer.from(this.y.toString("hex", 64), "hex"),
+        ]);
+      case "elliptic-compressed": {
+        const key = this.ecCurve.keyFromPublic({ x: this.x.toString("hex", 64), y: this.y.toString("hex", 64) }, "hex");
+        return Buffer.from(key.getPublic(true, "hex"));
+      }
+      default:
+        throw new Error("encoding doesn't exist in Point");
+    }
+  }
 }
 
 export default Point;