Fix packing bytes

Author: 0xfornax

rocketpool/watchtower/submit-rewards-tree-stateless.go

@@ -11,6 +11,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
@@ -508,7 +509,27 @@ func (t *submitRewardsTree_Stateless) getSnapshotEnd(endTime time.Time, state *s
 
 // Check whether the rewards tree for the current interval been submitted by the node
 func (t *submitRewardsTree_Stateless) hasSubmittedTree(nodeAddress common.Address, index *big.Int) (bool, error) {
-	indexBuffer := make([]byte, 32)
-	index.FillBytes(indexBuffer)
-	return t.rp.RocketStorage.GetBool(nil, crypto.Keccak256Hash([]byte("rewards.snapshot.submitted.node"), nodeAddress.Bytes(), indexBuffer))
+	stringArgument, err := abi.NewType("string", "string", nil)
+	if err != nil {
+		return false, err
+	}
+	addressArgument, err := abi.NewType("address", "address", nil)
+	if err != nil {
+		return false, err
+	}
+	uint256Argument, err := abi.NewType("uint256", "uint256", nil)
+	if err != nil {
+		return false, err
+	}
+
+	arguments := abi.Arguments{
+		{Type: stringArgument}, {Type: addressArgument}, {Type: uint256Argument},
+	}
+
+	packedBytes, err := arguments.Pack("rewards.snapshot.submitted.node", nodeAddress, index)
+	if err != nil {
+		return false, err
+	}
+
+	return t.rp.RocketStorage.GetBool(nil, crypto.Keccak256Hash(packedBytes))
 }