fix: 🐛 dividendCheckpoint start and end type to number type

Author: Victor Wiebe

src/contract_wrappers/modules/checkpoint/__tests__/dividend_checkpoint_wrapper.test.ts

@@ -17,6 +17,7 @@ import {
   weiToValue,
   valueToWei,
   numberArrayToBigNumberArray,
+  numberToBigNumber,
 } from '../../../../utils/convert';
 import ModuleWrapper from '../../module_wrapper';
 
@@ -953,8 +954,8 @@ describe('DividendCheckpointWrapper', () => {
 
       const mockedParams = {
         dividendIndex,
-        start: new Date(2030, 1),
-        end: new Date(2030, 2),
+        start: 1,
+        end: 4,
         txData: {},
         safetyFactor: 10,
       };
@@ -967,8 +968,8 @@ describe('DividendCheckpointWrapper', () => {
       when(
         mockedMethod.sendTransactionAsync(
           objectContaining(new BigNumber(mockedParams.dividendIndex)),
-          objectContaining(dateToBigNumber(mockedParams.start)),
-          objectContaining(dateToBigNumber(mockedParams.end)),
+          objectContaining(numberToBigNumber(mockedParams.start)),
+          objectContaining(numberToBigNumber(mockedParams.end)),
           mockedParams.txData,
           mockedParams.safetyFactor,
         ),
@@ -984,8 +985,8 @@ describe('DividendCheckpointWrapper', () => {
       verify(
         mockedMethod.sendTransactionAsync(
           objectContaining(new BigNumber(mockedParams.dividendIndex)),
-          objectContaining(dateToBigNumber(mockedParams.start)),
-          objectContaining(dateToBigNumber(mockedParams.end)),
+          objectContaining(numberToBigNumber(mockedParams.start)),
+          objectContaining(numberToBigNumber(mockedParams.end)),
           mockedParams.txData,
           mockedParams.safetyFactor,
         ),

src/contract_wrappers/modules/checkpoint/dividend_checkpoint_wrapper.ts

@@ -114,8 +114,8 @@ interface PushDividendPaymentToAddressesParams extends TxParams {
  */
 interface PushDividendPaymentParams extends TxParams {
   dividendIndex: number;
-  start: Date;
-  end: Date;
+  start: number;
+  end: number;
 }
 
 /**
@@ -400,8 +400,8 @@ export default abstract class DividendCheckpointWrapper extends ModuleWrapper {
     await this.checkValidDividend(params.dividendIndex);
     return (await this.contract).pushDividendPayment.sendTransactionAsync(
       numberToBigNumber(params.dividendIndex),
-      dateToBigNumber(params.start),
-      dateToBigNumber(params.end),
+      numberToBigNumber(params.start),
+      numberToBigNumber(params.end),
       params.txData,
       params.safetyFactor,
     );