deposit receipts start index getters and setters (#13947)

* adding in getters and setters for deposit receipts start index

* adding tests

* gaz

beacon-chain/state/interfaces.go

@@ -210,6 +210,7 @@ type ReadOnlySyncCommittee interface {
 type ReadOnlyElectra interface {
 	ConsolidationBalanceToConsume() (uint64, error)
 	DepositBalanceToConsume() (uint64, error)
+	DepositReceiptsStartIndex() (uint64, error)
 	EarliestConsolidationEpoch() (primitives.Epoch, error)
 	PendingBalanceDeposits() ([]*ethpb.PendingBalanceDeposit, error)
 	PendingConsolidations() ([]*ethpb.PendingConsolidation, error)
@@ -306,6 +307,7 @@ type WriteOnlyPendingBalanceDeposits interface {
 
 type WriteOnlyElectra interface {
 	SetConsolidationBalanceToConsume(gwei uint64) error
+	SetDepositReceiptsStartIndex(index uint64) error
 	SetEarliestConsolidationEpoch(epoch primitives.Epoch) error
 	SetPendingBalanceDeposits(val []*ethpb.PendingBalanceDeposit) error
 	SetDepositBalanceToConsume(gwei uint64) error

beacon-chain/state/state-native/BUILD.bazel

@@ -12,6 +12,7 @@ go_library(
         "getters_block.go",
         "getters_checkpoint.go",
         "getters_consolidation.go",
+        "getters_deposit_receipts.go",
         "getters_eth1.go",
         "getters_misc.go",
         "getters_participation.go",
@@ -31,6 +32,7 @@ go_library(
         "setters_checkpoint.go",
         "setters_churn.go",
         "setters_consolidation.go",
+        "setters_deposit_receipts.go",
         "setters_eth1.go",
         "setters_misc.go",
         "setters_participation.go",
@@ -90,6 +92,7 @@ go_test(
         "getters_block_test.go",
         "getters_checkpoint_test.go",
         "getters_consolidation_test.go",
+        "getters_deposit_receipts_test.go",
         "getters_participation_test.go",
         "getters_test.go",
         "getters_validator_test.go",
@@ -103,6 +106,7 @@ go_test(
         "setters_balance_deposits_test.go",
         "setters_churn_test.go",
         "setters_consolidation_test.go",
+        "setters_deposit_receipts_test.go",
         "setters_eth1_test.go",
         "setters_misc_test.go",
         "setters_participation_test.go",

beacon-chain/state/state-native/getters_deposit_receipts.go

@@ -0,0 +1,16 @@
+package state_native
+
+import (
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+)
+
+// DepositReceiptsStartIndex is used for returning the deposit receipts start index which is used for eip6110
+func (b *BeaconState) DepositReceiptsStartIndex() (uint64, error) {
+	if b.version < version.Electra {
+		return 0, errNotSupported("DepositReceiptsStartIndex", b.version)
+	}
+	b.lock.RLock()
+	defer b.lock.RUnlock()
+
+	return b.depositReceiptsStartIndex, nil
+}

beacon-chain/state/state-native/getters_deposit_receipts_test.go

@@ -0,0 +1,26 @@
+package state_native_test
+
+import (
+	"testing"
+
+	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/util"
+)
+
+func TestDepositReceiptsStartIndex(t *testing.T) {
+	t.Run("previous fork returns expected error", func(t *testing.T) {
+		dState, _ := util.DeterministicGenesisState(t, 1)
+		_, err := dState.DepositReceiptsStartIndex()
+		require.ErrorContains(t, "is not supported", err)
+	})
+	t.Run("electra returns expected value", func(t *testing.T) {
+		want := uint64(2)
+		dState, err := state_native.InitializeFromProtoElectra(&ethpb.BeaconStateElectra{DepositReceiptsStartIndex: want})
+		require.NoError(t, err)
+		got, err := dState.DepositReceiptsStartIndex()
+		require.NoError(t, err)
+		require.Equal(t, want, got)
+	})
+}

beacon-chain/state/state-native/setters_deposit_receipts.go

@@ -0,0 +1,21 @@
+package state_native
+
+import (
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native/types"
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+)
+
+// SetDepositReceiptsStartIndex for the beacon state. Updates the DepositReceiptsStartIndex
+func (b *BeaconState) SetDepositReceiptsStartIndex(index uint64) error {
+	if b.version < version.Electra {
+		return errNotSupported("SetDepositReceiptsStartIndex", b.version)
+	}
+
+	b.lock.Lock()
+	defer b.lock.Unlock()
+
+	b.depositReceiptsStartIndex = index
+	b.markFieldAsDirty(types.DepositReceiptsStartIndex)
+	b.rebuildTrie[types.DepositReceiptsStartIndex] = true
+	return nil
+}

beacon-chain/state/state-native/setters_deposit_receipts_test.go

@@ -0,0 +1,27 @@
+package state_native_test
+
+import (
+	"testing"
+
+	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/util"
+)
+
+func TestSetDepositReceiptsStartIndex(t *testing.T) {
+	t.Run("previous fork returns expected error", func(t *testing.T) {
+		dState, _ := util.DeterministicGenesisState(t, 1)
+		require.ErrorContains(t, "is not supported", dState.SetDepositReceiptsStartIndex(1))
+	})
+	t.Run("electra sets expected value", func(t *testing.T) {
+		old := uint64(2)
+		dState, err := state_native.InitializeFromProtoElectra(&ethpb.BeaconStateElectra{DepositReceiptsStartIndex: old})
+		require.NoError(t, err)
+		want := uint64(3)
+		require.NoError(t, dState.SetDepositReceiptsStartIndex(want))
+		got, err := dState.DepositReceiptsStartIndex()
+		require.NoError(t, err)
+		require.Equal(t, want, got)
+	})
+}