6164 batch request fix (#6166)

* allow batch size of 1

* add batch test and update changelog

Author: Alex

packages/web3-core/CHANGELOG.md

@@ -120,3 +120,7 @@ Documentation:
 [Migration Guide from 1.x](https://docs.web3js.org/guides/web3_upgrade_guide/x/)
 
 ## [Unreleased]
+
+### Fixed
+
+-   Fixed Batch requests erroring out on one request (#6164)

packages/web3-eth/test/integration/batch.test.ts

@@ -41,6 +41,26 @@ describe('eth', () => {
 	});
 
 	describe('methods', () => {
+		it('executes one batch request', async () => {
+			const acc1 = await createTempAccount();
+
+			const batch = new web3Eth.BatchRequest();
+			const request1 = {
+				id: 10,
+				method: 'eth_getBalance',
+				params: [acc1.address, 'latest'],
+			};
+			const r1 = batch.add(request1).catch(console.error);
+			const [response1] = await batch.execute();
+
+			// eslint-disable-next-line jest/no-standalone-expect
+			expect(response1.result).toBeDefined();
+			// TODO: in future release add test for validation of returned results , ( match balance )
+			// eslint-disable-next-line jest/no-standalone-expect
+			expect(Number(hexToNumber(String(response1.result)))).toBeGreaterThan(0);
+			const [res1] = await Promise.all([r1]);
+			expect(res1).toBe(response1.result);
+		});
 		it('BatchRequest', async () => {
 			const acc1 = await createTempAccount();
 			const acc2 = await createTempAccount();

packages/web3-utils/src/json_rpc.ts

@@ -91,7 +91,7 @@ export const isValidResponse = <Result = unknown, Error = unknown>(
 export const isBatchResponse = <Result = unknown, Error = unknown>(
 	response: JsonRpcResponse<Result, Error>,
 ): response is JsonRpcBatchResponse<Result, Error> =>
-	Array.isArray(response) && response.length > 1 && isValidResponse(response);
+	Array.isArray(response) && response.length > 0 && isValidResponse(response);
 
 // internal optional variable to increment and use for the jsonrpc `id`
 let requestIdSeed: number | undefined;
@@ -127,4 +127,4 @@ export const toBatchPayload = (requests: JsonRpcOptionalRequest<unknown>[]): Jso
 
 export const isBatchRequest = (
 	request: JsonRpcBatchRequest | JsonRpcRequest<unknown> | JsonRpcOptionalRequest<unknown>,
-): request is JsonRpcBatchRequest => Array.isArray(request) && request.length > 1;
+): request is JsonRpcBatchRequest => Array.isArray(request) && request.length > 0;