Add verifyBatch docs.

README.md

@@ -63,7 +63,7 @@ const msg = 'hello';
   const messages = ['whatsup', 'all good', 'thanks'];
   const signatures2 = await Promise.all(privateKeys.map((p, i) => bls.sign(messages[i], p)));
   const aggSignature2 = await bls.aggregateSignatures(signatures);
-  const isCorrect3 = await bls.verifyMultiple(signature, messages, publicKeys);
+  const isCorrect3 = await bls.verifyBatch(signature, messages, publicKeys);
 })();
 ```
 
@@ -74,6 +74,7 @@ const msg = 'hello';
 - [`verify(signature, hash, publicKey)`](#verifysignature-hash-publickey)
 - [`aggregatePublicKeys(publicKeys)`](#aggregatepublickeyspublickeys)
 - [`aggregateSignatures(signatures)`](#aggregatesignaturessignatures)
+- [`verifyBatch(messages, publicKeys, signature)`](#verifybatchmessages-publickeys-signature)
 - [`pairing(G1Point, G2Point)`](#pairingg1point-g2point)
 
 ##### `getPublicKey(privateKey)`
@@ -125,6 +126,19 @@ function aggregateSignatures(signatures: (Uint8Array | string | PointG2)[]): Uin
 - `signatures: (Uint8Array | string | PointG2)[]` - e.g. that have been generated by `sign`
 - Returns `Uint8Array | PointG2`: one aggregated signature which calculated from signatures
 
+##### `verifyBatch(hashes, publicKeys, signature)`
+```typescript
+function verifyBatch(
+  hashes: (Uint8Array | string | PointG2)[],
+  publicKeys: (Uint8Array | string | PointG1)[],
+  signature: Uint8Array | string | PointG2
+): Promise<boolean>
+```
+- `hashes: (Uint8Array | string | PointG2)[]` - messages hashes that needs to be verified
+- `publicKeys: (Uint8Array | string | PointG1)[]` - e.g. that were generated from `privateKeys` by `getPublicKey`
+- `signature: Uint8Array | string | PointG2` - object returned by the `aggregateSignatures` function
+- Returns `Promise<boolean>`: `true` / `false` whether the signature matches hashes
+
 ##### `pairing(G1Point, G2Point)`
 ```typescript
 function pairing(