fix(node): throw clear error message if unsupported protocol

src/Node.ts

@@ -7,6 +7,7 @@ import {
 } from './utils/autorest';
 import { Node as NodeApi, NodeOptionalParams, ErrorModel } from './apis/node';
 import { mapObject } from './utils/other';
+import { UnsupportedVersionError } from './utils/errors';
 import { Encoded } from './utils/encoder';
 import { ConsensusProtocolVersion } from './tx/builder/constants';
 
@@ -166,13 +167,23 @@ export default class Node extends (NodeTransformed as unknown as NodeTransformed
       protocols,
       topBlockHeight,
     } = await this.getStatus();
+
     const consensusProtocolVersion = protocols
       .filter(({ effectiveAtHeight }) => topBlockHeight >= effectiveAtHeight)
       .reduce(
         (acc, p) => (p.effectiveAtHeight > acc.effectiveAtHeight ? p : acc),
         { effectiveAtHeight: -1, version: 0 },
       )
       .version;
+    if (ConsensusProtocolVersion[consensusProtocolVersion] == null) {
+      const version = consensusProtocolVersion.toString();
+      const versions = Object.values(ConsensusProtocolVersion)
+        .filter((el) => typeof el === 'number').map((el) => +el);
+      const geVersion = Math.min(...versions).toString();
+      const ltVersion = (Math.max(...versions) + 1).toString();
+      throw new UnsupportedVersionError('consensus protocol', version, geVersion, ltVersion);
+    }
+
     return {
       url: this.$host,
       nodeNetworkId,

test/integration/node.ts

@@ -1,8 +1,11 @@
 import { describe, it, before } from 'mocha';
 import { expect } from 'chai';
+import { createSandbox } from 'sinon';
 import { PipelineRequest, PipelineResponse, SendRequest } from '@azure/core-rest-pipeline';
 import { url, ignoreVersion } from '.';
-import { AeSdkBase, Node, NodeNotFoundError } from '../../src';
+import {
+  AeSdkBase, Node, NodeNotFoundError, ConsensusProtocolVersion,
+} from '../../src';
 
 describe('Node client', () => {
   let node: Node;
@@ -48,6 +51,15 @@ describe('Node client', () => {
     expect(counter).to.be.equal(requestCount);
   }, Promise.resolve()));
 
+  it('throws exception if unsupported protocol', async () => {
+    const sandbox = createSandbox();
+    sandbox.stub(ConsensusProtocolVersion, 'Iris').value(undefined);
+    sandbox.stub(ConsensusProtocolVersion, '5' as 'Iris').value(undefined);
+    await expect(node.getNodeInfo()).to.be
+      .rejectedWith('Unsupported consensus protocol version 5. Supported: >= 6 < 7');
+    sandbox.restore();
+  });
+
   describe('Node Pool', () => {
     it('Throw error on using API without node', () => {
       const nodes = new AeSdkBase({});