fix: update interface

src/interfaces.ts

@@ -1,4 +1,4 @@
-import { KeyType, Point as TkeyPoint, ShareDescriptionMap } from "@tkey/common-types";
+import { BNString, KeyType, Point as TkeyPoint, ShareDescriptionMap } from "@tkey/common-types";
 import { TKeyTSS } from "@tkey/tss";
 import type {
   AGGREGATE_VERIFIER_TYPE,
@@ -92,7 +92,7 @@ export interface EnableMFAParams {
   /**
    * A BN used for encrypting your Device/ Recovery TSS Key Share. You can generate it using `generateFactorKey()` function or use an existing one.
    */
-  factorKey?: BN;
+  factorKey?: BNString;
   /**
    * Setting the Description of Share - Security Questions, Device Share, Seed Phrase, Password Share, Social Share, Other. Default is Other.
    */
@@ -229,7 +229,7 @@ export interface ICoreKit {
    * Share. You can generate it using `generateFactorKey()` function or use an
    * existing one.
    */
-  inputFactorKey(factorKey: BN): Promise<void>;
+  inputFactorKey(factorKey: BNString): Promise<void>;
 
   /**
    * Returns the current Factor Key and TssShareType in MPC Core Kit State

src/mpcCoreKit.ts

@@ -520,19 +520,20 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
     }
   }
 
-  public async inputFactorKey(factorKey: BN): Promise<void> {
+  public async inputFactorKey(factorKey: BNString): Promise<void> {
+    const factorKeyBN = new BN(factorKey, "hex");
     this.checkReady();
     try {
       // input tkey device share when required share > 0 ( or not reconstructed )
       // assumption tkey shares will not changed
       if (!this.tKey.secp256k1Key) {
-        const factorKeyMetadata = await this.getFactorKeyMetadata(factorKey);
+        const factorKeyMetadata = await this.getFactorKeyMetadata(factorKeyBN);
         await this.tKey.inputShareStoreSafe(factorKeyMetadata, true);
       }
 
       // Finalize initialization.
       await this.tKey.reconstructKey();
-      await this.finalizeTkey(factorKey);
+      await this.finalizeTkey(factorKeyBN);
     } catch (err: unknown) {
       log.error("login error", err);
       if (err instanceof CoreError) {
@@ -637,6 +638,9 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
     const { shareType } = createFactorParams;
 
     let { factorKey, shareDescription, additionalMetadata } = createFactorParams;
+    if (typeof factorKey === "string") {
+      factorKey = new BN(factorKey, "hex");
+    }
 
     if (!VALID_SHARE_INDICES.includes(shareType)) {
       throw CoreKitError.newShareIndexInvalid(`Invalid share type provided (${shareType}). Valid share types are ${VALID_SHARE_INDICES}.`);
@@ -994,6 +998,10 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
     this.tkey.metadata.setGeneralStoreDomain(domain, value);
   }
 
+  public getmetadataKey(): string | undefined {
+    return this.tkey?.secp256k1Key.toString(16);
+  }
+
   protected async atomicSync<T>(f: () => Promise<T>): Promise<T> {
     this.atomicCallStackCounter += 1;