Add verifyMultipleSignatures method

src/blst/signature.ts

@@ -28,6 +28,14 @@ export class Signature implements ISignature {
     return new Signature(agg.toSignature());
   }
 
+  static verifyMultipleSignatures(publicKeys: PublicKey[], messages: Uint8Array[], signatures: Signature[]): boolean {
+    return blst.verifyMultipleAggregateSignatures(
+      messages,
+      publicKeys.map((publicKey) => publicKey.affine),
+      signatures.map((signature) => signature.affine)
+    );
+  }
+
   verify(publicKey: PublicKey, message: Uint8Array): boolean {
     // Individual infinity signatures are NOT okay. Aggregated signatures MAY be infinity
     if (this.affine.value.is_inf()) {

src/functional.ts

@@ -106,6 +106,36 @@ export function functionalInterfaceFactory({
     }
   }
 
+  /**
+   * Verifies multiple signatures at once returning true if all valid or false
+   * if at least one is not. Optimized method when knowing which signature is
+   * wrong is not relevant, i.e. verifying an Eth2.0 block.
+   * https://ethresear.ch/t/fast-verification-of-multiple-bls-signatures/5407
+   */
+  function verifyMultipleSignatures(
+    publicKeys: Uint8Array[],
+    messages: Uint8Array[],
+    signatures: Uint8Array[]
+  ): boolean {
+    validateBytes(publicKeys, "publicKey");
+    validateBytes(messages, "message");
+    validateBytes(signatures, "signatures");
+
+    if (publicKeys.length === 0 || publicKeys.length !== messages.length || publicKeys.length !== signatures.length) {
+      return false;
+    }
+    try {
+      return Signature.verifyMultipleSignatures(
+        publicKeys.map((publicKey) => PublicKey.fromBytes(publicKey)),
+        messages.map((msg) => msg),
+        signatures.map((signature) => Signature.fromBytes(signature))
+      );
+    } catch (e) {
+      if (e instanceof NotInitializedError) throw e;
+      return false;
+    }
+  }
+
   /**
    * Computes a public key from a secret key
    */
@@ -121,6 +151,7 @@ export function functionalInterfaceFactory({
     verify,
     verifyAggregate,
     verifyMultiple,
+    verifyMultipleSignatures,
     secretKeyToPublicKey,
   };
 }

src/herumi/signature.ts

@@ -1,5 +1,5 @@
 import {SIGNATURE_LENGTH} from "../constants";
-import {SignatureType} from "bls-eth-wasm";
+import {SignatureType, multiVerify} from "bls-eth-wasm";
 import {getContext} from "./context";
 import {PublicKey} from "./publicKey";
 import {bytesToHex, hexToBytes, isZeroUint8Array} from "../helpers";
@@ -45,6 +45,14 @@ export class Signature implements ISignature {
     return new Signature(signature);
   }
 
+  static verifyMultipleSignatures(publicKeys: PublicKey[], messages: Uint8Array[], signatures: Signature[]): boolean {
+    return multiVerify(
+      publicKeys.map((publicKey) => publicKey.value),
+      signatures.map((signature) => signature.value),
+      messages
+    );
+  }
+
   verify(publicKey: PublicKey, message: Uint8Array): boolean {
     return publicKey.value.verify(this.value, message);
   }

src/interface.ts

@@ -13,6 +13,7 @@ export interface IBls {
     fromBytes(bytes: Uint8Array): Signature;
     fromHex(hex: string): Signature;
     aggregate(signatures: Signature[]): Signature;
+    verifyMultipleSignatures(publicKeys: PublicKey[], messages: Uint8Array[], signatures: Signature[]): boolean;
   };
 
   sign(secretKey: Uint8Array, message: Uint8Array): Uint8Array;
@@ -21,6 +22,7 @@ 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;
+  verifyMultipleSignatures(publicKeys: Uint8Array[], messages: Uint8Array[], signatures: Uint8Array[]): boolean;
   secretKeyToPublicKey(secretKey: Uint8Array): Uint8Array;
 
   init(): Promise<void>;
@@ -49,6 +51,7 @@ export declare class Signature {
   static fromBytes(bytes: Uint8Array): Signature;
   static fromHex(hex: string): Signature;
   static aggregate(signatures: Signature[]): Signature;
+  static verifyMultipleSignatures(publicKeys: PublicKey[], messages: Uint8Array[], signatures: Signature[]): boolean;
   verify(publicKey: PublicKey, message: Uint8Array): boolean;
   verifyAggregate(publicKeys: PublicKey[], message: Uint8Array): boolean;
   verifyMultiple(publicKeys: PublicKey[], messages: Uint8Array[]): boolean;