Fix error on contract method proxy when method parameter is null.

packages/web3-eth-contract/src/proxies/MethodsProxy.js

@@ -191,7 +191,7 @@ export default class MethodsProxy {
  method.setArguments(methodArguments);
 
  // If no parameters are given for the eth_call or eth_send* methods then it will set a empty options object.
- if (typeof method.parameters[0] === 'undefined') {
+ if (!method.parameters[0]) {
  method.parameters[0] = {};
  }
 

packages/web3-eth-contract/tests/src/proxies/MethodsProxyTest.js

@@ -115,6 +115,47 @@ describe('MethodsProxyTest', () => {
  expect(methodOptionsValidatorMock.validate).toHaveBeenCalledWith(abiItemModelMock, callMethodMock);
  });
 
+ it('calls a call method over the proxy should allow null parameters', async () => {
+ abiModelMock.hasMethod.mockReturnValueOnce(true);
+
+ abiModelMock.getMethod.mockReturnValueOnce(abiItemModelMock);
+
+ const callMethodMock = {};
+ callMethodMock.parameters = [null];
+ callMethodMock.setArguments = jest.fn();
+ callMethodMock.execute = jest.fn(() => {
+ return Promise.resolve(true);
+ });
+
+ methodFactoryMock.createMethodByRequestType.mockReturnValueOnce(callMethodMock);
+
+ methodEncoderMock.encode.mockReturnValueOnce('0x0');
+
+ methodOptionsMapperMock.map.mockReturnValueOnce({options: true});
+
+ await expect(methodsProxy.myMethod(true).call({options: false})).resolves.toEqual(true);
+
+ expect(abiModelMock.hasMethod).toHaveBeenCalledWith('myMethod');
+
+ expect(abiModelMock.getMethod).toHaveBeenCalledWith('myMethod');
+
+ expect(abiItemModelMock.contractMethodParameters[0]).toEqual(true);
+
+ expect(methodFactoryMock.createMethodByRequestType).toHaveBeenCalledWith(
+ abiItemModelMock,
+ contractMock,
+ 'call'
+ );
+
+ expect(callMethodMock.parameters[0]).toEqual({options: true});
+
+ expect(methodEncoderMock.encode).toHaveBeenCalledWith(abiItemModelMock, contractMock.data);
+
+ expect(methodOptionsMapperMock.map).toHaveBeenCalledWith(contractMock, {data: '0x0'});
+
+ expect(methodOptionsValidatorMock.validate).toHaveBeenCalledWith(abiItemModelMock, callMethodMock);
+ });
+
  it('calls the constructor method over the proxy', async () => {
  abiModelMock.hasMethod.mockReturnValueOnce(true);