From e0076d0f27f1a3998498141292076d8945409745 Mon Sep 17 00:00:00 2001
From: Cayman <caymannava@gmail.com>
Date: Mon, 30 Nov 2020 13:40:07 -0600
Subject: [PATCH] Add secretKeyToPublicKey function

---
 src/functional.ts | 9 +++++++++
 src/interface.ts  | 1 +
 2 files changed, 10 insertions(+)

diff --git a/src/functional.ts b/src/functional.ts
index 7ff58e5..61e04c8 100644
--- a/src/functional.ts
+++ b/src/functional.ts
@@ -106,6 +106,14 @@ export function functionalInterfaceFactory({
     }
   }
 
+  /**
+   * Computes a public key from a secret key
+   */
+  function secretKeyToPublicKey(secretKey: Uint8Array): Uint8Array {
+    validateBytes(secretKey, "secretKey");
+    return SecretKey.fromBytes(secretKey).toPublicKey().toBytes();
+  }
+
   return {
     sign,
     aggregateSignatures,
@@ -113,5 +121,6 @@ export function functionalInterfaceFactory({
     verify,
     verifyAggregate,
     verifyMultiple,
+    secretKeyToPublicKey,
   };
 }
diff --git a/src/interface.ts b/src/interface.ts
index bc00966..cb57bce 100644
--- a/src/interface.ts
+++ b/src/interface.ts
@@ -21,6 +21,7 @@ export interface IBls {
   verify(publicKey: Uint8Array, message: Uint8Array, signature: Uint8Array): boolean;
   verifyAggregate(publicKeys: Uint8Array[], message: Uint8Array, signature: Uint8Array): boolean;
   verifyMultiple(publicKeys: Uint8Array[], messages: Uint8Array[], signature: Uint8Array): boolean;
+  secretKeyToPublicKey(secretKey: Uint8Array): Uint8Array;
 
   init(): Promise<void>;
   destroy(): void;