feat(Provider): add Provider.getProtocolVersion() method

src/provider.ts

@@ -35,7 +35,7 @@ import {
   RawBlockTransaction,
   StorageProof,
   PaymasterParams,
-  Eip712Meta, LogProof, Token,
+  Eip712Meta, LogProof, Token, ProtocolVersion,
 } from './types';
 import {
   BOOTLOADER_FORMAL_ADDRESS,
@@ -670,6 +670,24 @@ export class Provider extends ethers.providers.JsonRpcProvider {
     }
   }
 
+  /**
+   * Return the protocol version
+   *
+   * Calls the {@link https://docs.zksync.io/build/api.html#zks_getprotocolversion zks_getProtocolVersion} JSON-RPC method.
+   *
+   * @param [id] Specific version ID.
+   *
+   * @example
+   *
+   * import { Provider, types } from "zksync-ethers";
+   *
+   * const provider = Provider.getDefaultProvider(types.Network.Sepolia);
+   * console.log(`Protocol version: ${await provider.getProtocolVersion()}`);
+   */
+  async getProtocolVersion(id?: number): Promise<ProtocolVersion> {
+    return await this.send('zks_getProtocolVersion', [id]);
+  }
+
   /**
    * Returns an estimate of the amount of gas required to submit a transaction from L1 to L2.
    *
@@ -2205,6 +2223,20 @@ export class Web3Provider extends Provider {
     return super.l1TokenAddress(token);
   }
 
+  /**
+   * @inheritDoc
+   *
+   * @example
+   *
+   * import { Web3Provider } from "zksync-ethers";
+   *
+   * const provider = new Web3Provider(window.ethereum);
+   * console.log(`Protocol version: ${await provider.getProtocolVersion()}`);
+   */
+  override async getProtocolVersion(id?: number): Promise<ProtocolVersion> {
+    return super.getProtocolVersion(id);
+  }
+
   /**
    * @inheritDoc
    *

tests/integration/provider.test.ts

@@ -90,6 +90,13 @@ describe('Provider', () => {
     });
   });
 
+  describe('#getProtocolVersion()', () => {
+    it('should return the latest protocol version', async () => {
+      const result = await provider.getProtocolVersion();
+      expect(result).not.to.be.null;
+    });
+  });
+
   describe('#getMainContractAddress()', () => {
     it('should return the address of main contract', async () => {
       const result = await provider.getMainContractAddress();