diff --git a/src/blst/publicKey.ts b/src/blst/publicKey.ts
index c5e45bb..657aef2 100644
--- a/src/blst/publicKey.ts
+++ b/src/blst/publicKey.ts
@@ -1,7 +1,6 @@
 import * as blst from "@chainsafe/blst";
 import {bytesToHex, hexToBytes} from "../helpers";
 import {IPublicKey} from "../interface";
-import {Signature} from "./signature";
 
 export class PublicKey implements IPublicKey {
   readonly affine: blst.PublicKey;
@@ -28,10 +27,6 @@ export class PublicKey implements IPublicKey {
     return new PublicKey(affine, jacobian);
   }
 
-  verifyMessage(signature: Signature, message: Uint8Array): boolean {
-    return signature.verify(this, message);
-  }
-
   toBytes(): Uint8Array {
     return this.affine.toBytes();
   }
diff --git a/src/herumi/publicKey.ts b/src/herumi/publicKey.ts
index a9a40a5..441193e 100644
--- a/src/herumi/publicKey.ts
+++ b/src/herumi/publicKey.ts
@@ -1,7 +1,6 @@
 import {PublicKeyType} from "bls-eth-wasm";
 import {getContext} from "./context";
 import {EMPTY_PUBLIC_KEY, PUBLIC_KEY_LENGTH} from "../constants";
-import {Signature} from "./signature";
 import {bytesToHex, hexToBytes, isEqualBytes} from "../helpers";
 import {IPublicKey} from "../interface";
 
@@ -41,16 +40,6 @@ export class PublicKey implements IPublicKey {
     return agg;
   }
 
-  add(other: PublicKey): PublicKey {
-    const agg = new PublicKey(this.value.clone());
-    agg.value.add(other.value);
-    return agg;
-  }
-
-  verifyMessage(signature: Signature, message: Uint8Array): boolean {
-    return this.value.verify(signature.value, message);
-  }
-
   toBytes(): Uint8Array {
     return this.value.serialize();
   }
diff --git a/src/herumi/signature.ts b/src/herumi/signature.ts
index e527cf7..b0d9fc2 100644
--- a/src/herumi/signature.ts
+++ b/src/herumi/signature.ts
@@ -44,12 +44,6 @@ export class Signature implements ISignature {
     return new Signature(signature);
   }
 
-  add(other: Signature): Signature {
-    const agg = this.value.clone();
-    agg.add(other.value);
-    return new Signature(agg);
-  }
-
   verify(publicKey: PublicKey, message: Uint8Array): boolean {
     return publicKey.value.verify(this.value, message);
   }