fix: add stake unit tests

web3.js/src/index.js

@@ -6,7 +6,14 @@ export {CONFIG_PROGRAM_ID} from './config-program';
 export {Connection} from './connection';
 export {Loader} from './loader';
 export {PublicKey} from './publickey';
-export {StakeInstruction, StakeProgram} from './stake-program';
+export {
+  Authorized,
+  Lockup,
+  StakeAuthorizationLayout,
+  StakeInstruction,
+  StakeInstructionLayout,
+  StakeProgram,
+} from './stake-program';
 export {SystemInstruction, SystemProgram} from './system-program';
 export {Transaction, TransactionInstruction} from './transaction';
 export {VALIDATOR_INFO_KEY, ValidatorInfo} from './validator-info';

web3.js/src/stake-program.js

@@ -97,7 +97,7 @@ export class StakeInstruction extends TransactionInstruction {
 /**
  * An enumeration of valid StakeInstructionTypes
  */
-const StakeInstructionLayout = Object.freeze({
+export const StakeInstructionLayout = Object.freeze({
   Initialize: {
     index: 0,
     layout: BufferLayout.struct([
@@ -210,8 +210,14 @@ export class StakeProgram {
   ): TransactionInstruction {
     const type = StakeInstructionLayout.Initialize;
     const data = encodeData(type, {
-      authorized,
-      lockup,
+      authorized: {
+        staker: authorized.staker.toBuffer(),
+        withdrawer: authorized.withdrawer.toBuffer(),
+      },
+      lockup: {
+        epoch: lockup.epoch,
+        custodian: lockup.custodian.toBuffer(),
+      },
     });
     const instructionData = {
       keys: [
@@ -307,7 +313,7 @@ export class StakeProgram {
   ): Transaction {
     const type = StakeInstructionLayout.Authorize;
     const data = encodeData(type, {
-      newAuthorized,
+      newAuthorized: newAuthorized.toBuffer(),
       stakeAuthorizationType: stakeAuthorizationType.index,
     });