diff --git a/packages/state-transition/src/stateView/interface.ts b/packages/state-transition/src/stateView/interface.ts
index 5dead7e6dffa..e1905d807770 100644
--- a/packages/state-transition/src/stateView/interface.ts
+++ b/packages/state-transition/src/stateView/interface.ts
@@ -278,6 +278,35 @@ export type IBeaconStateViewLatestFork = Omit<
   latestExecutionPayloadHeader: ExecutionPayloadHeader;
   payloadBlockNumber: number;
 };
+
+/**
+ * Contract a BeaconStateView backing implementation must satisfy.
+ *
+ * Differs from `IBeaconStateViewLatestFork` in two ways:
+ * - `executionPayloadAvailability` is a raw `{uint8Array, bitLen}` POJO — a
+ *   native (`.node`) binding cannot construct a `BitArray` across FFI.
+ *   `NativeBeaconStateView` lifts it back to `BitArray` for beacon-node.
+ * - Methods that produce another view (`stateTransition`, `processSlots`,
+ *   `loadOtherState`, `withParentPayloadApplied`) return `IBeaconStateViewNative`
+ *   so callers can re-wrap without an `as unknown` cast. Param lists are reused
+ *   via `Parameters<...>` to avoid duplicating signatures.
+ *
+ * The TS-side `BeaconStateView` also structurally satisfies this contract since
+ * `BitArray` exposes `uint8Array` and `bitLen`.
+ */
+export type IBeaconStateViewNative = Omit<
+  IBeaconStateViewLatestFork,
+  "executionPayloadAvailability" | "loadOtherState" | "stateTransition" | "processSlots" | "withParentPayloadApplied"
+> & {
+  executionPayloadAvailability: {uint8Array: Uint8Array; bitLen: number};
+  loadOtherState(...args: Parameters<IBeaconStateViewLatestFork["loadOtherState"]>): IBeaconStateViewNative;
+  stateTransition(...args: Parameters<IBeaconStateViewLatestFork["stateTransition"]>): IBeaconStateViewNative;
+  processSlots(...args: Parameters<IBeaconStateViewLatestFork["processSlots"]>): IBeaconStateViewNative;
+  withParentPayloadApplied(
+    ...args: Parameters<IBeaconStateViewLatestFork["withParentPayloadApplied"]>
+  ): IBeaconStateViewNative;
+};
+
 export function isStatePostAltair(state: IBeaconStateView): state is IBeaconStateViewAltair {
   return isForkPostAltair(state.forkName);
 }
diff --git a/packages/state-transition/src/stateView/nativeBeaconStateView.ts b/packages/state-transition/src/stateView/nativeBeaconStateView.ts
new file mode 100644
index 000000000000..c0f3ad4a967a
--- /dev/null
+++ b/packages/state-transition/src/stateView/nativeBeaconStateView.ts
@@ -0,0 +1,893 @@
+import {CompactMultiProof} from "@chainsafe/persistent-merkle-tree";
+import {BitArray, ByteViews} from "@chainsafe/ssz";
+import {ForkName} from "@lodestar/params";
+import {
+  BeaconBlock,
+  BeaconState,
+  BlindedBeaconBlock,
+  BuilderIndex,
+  Bytes32,
+  Epoch,
+  ExecutionPayloadBid,
+  ExecutionPayloadHeader,
+  Root,
+  RootHex,
+  SignedBeaconBlock,
+  SignedBlindedBeaconBlock,
+  Slot,
+  SyncCommittee,
+  ValidatorIndex,
+  altair,
+  capella,
+  electra,
+  fulu,
+  gloas,
+  phase0,
+  rewards,
+} from "@lodestar/types";
+import {Checkpoint, Fork} from "@lodestar/types/phase0";
+import {VoluntaryExitValidity} from "../block/processVoluntaryExit.js";
+import {EffectiveBalanceIncrements} from "../cache/effectiveBalanceIncrements.js";
+import {EpochTransitionCacheOpts} from "../cache/epochTransitionCache.js";
+import {RewardCache} from "../cache/rewardCache.js";
+import {SyncCommitteeCache} from "../cache/syncCommitteeCache.js";
+import {SyncCommitteeWitness} from "../lightClient/types.js";
+import {StateTransitionModules, StateTransitionOpts} from "../stateTransition.js";
+import {EpochShuffling} from "../util/epochShuffling.js";
+import {
+  IBeaconStateView,
+  IBeaconStateViewGloas,
+  IBeaconStateViewLatestFork,
+  IBeaconStateViewNative,
+  isStatePostGloas,
+} from "./interface.js";
+
+/**
+ * Wraps a native binding (the auto-generated JS interface produced by a `.node`
+ * file) and exposes it as a fully-conformant `IBeaconStateViewLatestFork`.
+ *
+ * The binding is typed `IBeaconStateViewNative` — identical to
+ * `IBeaconStateViewLatestFork` except `executionPayloadAvailability` is a raw
+ * `{uint8Array, bitLen}` POJO. The `executionPayloadAvailability` getter lifts
+ * that POJO back to a `BitArray` so beacon-node consumers see no difference from
+ * the TS-side `BeaconStateView`.
+ *
+ * Every getter that returns a value stable for the view's lifetime is cached so
+ * the binding is hit at most once per field per view. Only mutable counters
+ * (`proposerRewards`, `clonedCount`, `clonedCountWithTransferCache`) stay
+ * pass-through. Methods with arguments are pass-through too — caching them
+ * would need a per-arg map and isn't worth it without a hot-path signal.
+ */
+export class NativeBeaconStateView implements IBeaconStateViewLatestFork {
+  // phase0
+  private _forkName: ForkName | null = null;
+  private _slot: Slot | null = null;
+  private _fork: Fork | null = null;
+  private _epoch: Epoch | null = null;
+  private _genesisTime: number | null = null;
+  private _genesisValidatorsRoot: Root | null = null;
+  private _eth1Data: phase0.Eth1Data | null = null;
+  private _latestBlockHeader: phase0.BeaconBlockHeader | null = null;
+  private _previousJustifiedCheckpoint: Checkpoint | null = null;
+  private _currentJustifiedCheckpoint: Checkpoint | null = null;
+  private _finalizedCheckpoint: Checkpoint | null = null;
+  // shuffling / decision roots / proposers
+  private _previousDecisionRoot: RootHex | null = null;
+  private _currentDecisionRoot: RootHex | null = null;
+  private _nextDecisionRoot: RootHex | null = null;
+  // previousProposers can be null, so use undefined as the "not loaded" sentinel
+  private _previousProposers: ValidatorIndex[] | null | undefined = undefined;
+  private _currentProposers: ValidatorIndex[] | null = null;
+  private _nextProposers: ValidatorIndex[] | null = null;
+  // validators / balances
+  private _effectiveBalanceIncrements: EffectiveBalanceIncrements | null = null;
+  private _validatorCount: number | null = null;
+  private _activeValidatorCount: number | null = null;
+  // backward compat
+  private _createdWithTransferCache: boolean | null = null;
+  // altair
+  private _currentSyncCommittee: SyncCommittee | null = null;
+  private _nextSyncCommittee: SyncCommittee | null = null;
+  private _previousEpochParticipation: Uint8Array | null = null;
+  private _currentEpochParticipation: Uint8Array | null = null;
+  private _currentSyncCommitteeIndexed: SyncCommitteeCache | null = null;
+  private _syncProposerReward: number | null = null;
+  // bellatrix
+  private _latestExecutionPayloadHeader: ExecutionPayloadHeader | null = null;
+  private _payloadBlockNumber: number | null = null;
+  private _isExecutionStateType: boolean | null = null;
+  private _isMergeTransitionComplete: boolean | null = null;
+  // capella
+  private _historicalSummaries: capella.HistoricalSummaries | null = null;
+  // electra
+  private _pendingPartialWithdrawals: electra.PendingPartialWithdrawals | null = null;
+  private _pendingConsolidations: electra.PendingConsolidations | null = null;
+  private _pendingDeposits: electra.PendingDeposits | null = null;
+  private _pendingDepositsCount: number | null = null;
+  private _pendingPartialWithdrawalsCount: number | null = null;
+  private _pendingConsolidationsCount: number | null = null;
+  // fulu
+  private _proposerLookahead: fulu.ProposerLookahead | null = null;
+  // gloas
+  private _executionPayloadAvailability: BitArray | null = null;
+  private _latestBlockHash: Bytes32 | null = null;
+  private _latestExecutionPayloadBid: ExecutionPayloadBid | null = null;
+  private _payloadExpectedWithdrawals: capella.Withdrawal[] | null = null;
+
+  // Per-argument caches for argument-taking methods. The binding is treated as
+  // immutable for the view's lifetime, so a given argument always yields the
+  // same result. Maps grow only with touched arguments — typical call patterns
+  // (e.g. a handful of slots per attestation pool scan) keep them tiny.
+  private readonly _getBlockRootAtSlot = new Map<Slot, Root>();
+  private readonly _getBlockRootAtEpoch = new Map<Epoch, Root>();
+  private readonly _getStateRootAtSlot = new Map<Slot, Root>();
+  private readonly _getRandaoMix = new Map<Epoch, Bytes32>();
+  private readonly _getShufflingAtEpoch = new Map<Epoch, EpochShuffling>();
+  private readonly _getShufflingDecisionRoot = new Map<Epoch, RootHex>();
+  private readonly _getBeaconProposer = new Map<Slot, ValidatorIndex>();
+  // getBeaconProposerOrNull can return null, so use .has() to distinguish "not cached" from "cached null"
+  private readonly _getBeaconProposerOrNull = new Map<Slot, ValidatorIndex | null>();
+  private readonly _getValidator = new Map<ValidatorIndex, phase0.Validator>();
+  private readonly _getBalance = new Map<number, number>();
+  private readonly _getIndexedSyncCommitteeAtEpoch = new Map<Epoch, SyncCommitteeCache>();
+  private readonly _getIndexedSyncCommittee = new Map<Slot, SyncCommitteeCache>();
+  private readonly _getSingleProof = new Map<bigint, Uint8Array[]>();
+  private readonly _getEpochPTCs = new Map<Epoch, Uint32Array[]>();
+  private readonly _getBuilder = new Map<BuilderIndex, gloas.Builder>();
+
+  // No-arg method caches
+  private _getPreviousShuffling: EpochShuffling | null = null;
+  private _getCurrentShuffling: EpochShuffling | null = null;
+  private _getNextShuffling: EpochShuffling | null = null;
+  private _getEffectiveBalanceIncrementsZeroInactive: EffectiveBalanceIncrements | null = null;
+  private _getAllValidators: phase0.Validator[] | null = null;
+  private _getAllBalances: number[] | null = null;
+  private _getLatestWeakSubjectivityCheckpointEpoch: Epoch | null = null;
+  private _getFinalizedRootProof: Uint8Array[] | null = null;
+  private _computeUnrealizedCheckpoints: {
+    justifiedCheckpoint: phase0.Checkpoint;
+    finalizedCheckpoint: phase0.Checkpoint;
+  } | null = null;
+  private _computeAnchorCheckpoint: {checkpoint: phase0.Checkpoint; blockHeader: phase0.BeaconBlockHeader} | null =
+    null;
+  private _isStateValidatorsNodesPopulated: boolean | null = null;
+  private _toValue: BeaconState | null = null;
+  private _serialize: Uint8Array | null = null;
+  private _serializedSize: number | null = null;
+  private _serializeValidators: Uint8Array | null = null;
+  private _serializedValidatorsSize: number | null = null;
+  private _hashTreeRoot: Uint8Array | null = null;
+  private _getSyncCommitteesWitness: SyncCommitteeWitness | null = null;
+  private _getExpectedWithdrawals: {
+    expectedWithdrawals: capella.Withdrawal[];
+    processedBuilderWithdrawalsCount: number;
+    processedPartialWithdrawalsCount: number;
+    processedBuildersSweepCount: number;
+    processedValidatorSweepCount: number;
+  } | null = null;
+
+  constructor(readonly binding: IBeaconStateViewNative) {}
+
+  // Binding returns pojo object {uint8Array: Uint8Array; bitLen: number}
+  // this class wrap it with BitArray to conform to the api
+  get executionPayloadAvailability(): BitArray {
+    if (this._executionPayloadAvailability === null) {
+      const pojo = this.binding.executionPayloadAvailability;
+      this._executionPayloadAvailability = new BitArray(pojo.uint8Array, pojo.bitLen);
+    }
+
+    return this._executionPayloadAvailability;
+  }
+
+  // ─── phase0 ──────────────────────────────────────────────────────────────
+
+  get forkName(): ForkName {
+    if (this._forkName === null) {
+      this._forkName = this.binding.forkName;
+    }
+    return this._forkName;
+  }
+
+  get slot(): Slot {
+    if (this._slot === null) {
+      this._slot = this.binding.slot;
+    }
+    return this._slot;
+  }
+
+  get fork(): Fork {
+    if (this._fork === null) {
+      this._fork = this.binding.fork;
+    }
+    return this._fork;
+  }
+
+  get epoch(): Epoch {
+    if (this._epoch === null) {
+      this._epoch = this.binding.epoch;
+    }
+    return this._epoch;
+  }
+
+  get genesisTime(): number {
+    if (this._genesisTime === null) {
+      this._genesisTime = this.binding.genesisTime;
+    }
+    return this._genesisTime;
+  }
+
+  get genesisValidatorsRoot(): Root {
+    if (this._genesisValidatorsRoot === null) {
+      this._genesisValidatorsRoot = this.binding.genesisValidatorsRoot;
+    }
+    return this._genesisValidatorsRoot;
+  }
+
+  get eth1Data(): phase0.Eth1Data {
+    if (this._eth1Data === null) {
+      this._eth1Data = this.binding.eth1Data;
+    }
+    return this._eth1Data;
+  }
+
+  get latestBlockHeader(): phase0.BeaconBlockHeader {
+    if (this._latestBlockHeader === null) {
+      this._latestBlockHeader = this.binding.latestBlockHeader;
+    }
+    return this._latestBlockHeader;
+  }
+
+  get previousJustifiedCheckpoint(): Checkpoint {
+    if (this._previousJustifiedCheckpoint === null) {
+      this._previousJustifiedCheckpoint = this.binding.previousJustifiedCheckpoint;
+    }
+    return this._previousJustifiedCheckpoint;
+  }
+
+  get currentJustifiedCheckpoint(): Checkpoint {
+    if (this._currentJustifiedCheckpoint === null) {
+      this._currentJustifiedCheckpoint = this.binding.currentJustifiedCheckpoint;
+    }
+    return this._currentJustifiedCheckpoint;
+  }
+
+  get finalizedCheckpoint(): Checkpoint {
+    if (this._finalizedCheckpoint === null) {
+      this._finalizedCheckpoint = this.binding.finalizedCheckpoint;
+    }
+    return this._finalizedCheckpoint;
+  }
+
+  getBlockRootAtSlot(slot: Slot): Root {
+    let cached = this._getBlockRootAtSlot.get(slot);
+    if (cached === undefined) {
+      cached = this.binding.getBlockRootAtSlot(slot);
+      this._getBlockRootAtSlot.set(slot, cached);
+    }
+    return cached;
+  }
+
+  getBlockRootAtEpoch(epoch: Epoch): Root {
+    let cached = this._getBlockRootAtEpoch.get(epoch);
+    if (cached === undefined) {
+      cached = this.binding.getBlockRootAtEpoch(epoch);
+      this._getBlockRootAtEpoch.set(epoch, cached);
+    }
+    return cached;
+  }
+
+  getStateRootAtSlot(slot: Slot): Root {
+    let cached = this._getStateRootAtSlot.get(slot);
+    if (cached === undefined) {
+      cached = this.binding.getStateRootAtSlot(slot);
+      this._getStateRootAtSlot.set(slot, cached);
+    }
+    return cached;
+  }
+
+  getRandaoMix(epoch: Epoch): Bytes32 {
+    let cached = this._getRandaoMix.get(epoch);
+    if (cached === undefined) {
+      cached = this.binding.getRandaoMix(epoch);
+      this._getRandaoMix.set(epoch, cached);
+    }
+    return cached;
+  }
+
+  // Shuffling and committees
+
+  getShufflingAtEpoch(epoch: Epoch): EpochShuffling {
+    let cached = this._getShufflingAtEpoch.get(epoch);
+    if (cached === undefined) {
+      cached = this.binding.getShufflingAtEpoch(epoch);
+      this._getShufflingAtEpoch.set(epoch, cached);
+    }
+    return cached;
+  }
+
+  get previousDecisionRoot(): RootHex {
+    if (this._previousDecisionRoot === null) {
+      this._previousDecisionRoot = this.binding.previousDecisionRoot;
+    }
+    return this._previousDecisionRoot;
+  }
+
+  get currentDecisionRoot(): RootHex {
+    if (this._currentDecisionRoot === null) {
+      this._currentDecisionRoot = this.binding.currentDecisionRoot;
+    }
+    return this._currentDecisionRoot;
+  }
+
+  get nextDecisionRoot(): RootHex {
+    if (this._nextDecisionRoot === null) {
+      this._nextDecisionRoot = this.binding.nextDecisionRoot;
+    }
+    return this._nextDecisionRoot;
+  }
+
+  getShufflingDecisionRoot(epoch: Epoch): RootHex {
+    let cached = this._getShufflingDecisionRoot.get(epoch);
+    if (cached === undefined) {
+      cached = this.binding.getShufflingDecisionRoot(epoch);
+      this._getShufflingDecisionRoot.set(epoch, cached);
+    }
+    return cached;
+  }
+
+  getPreviousShuffling(): EpochShuffling {
+    if (this._getPreviousShuffling === null) {
+      this._getPreviousShuffling = this.binding.getPreviousShuffling();
+    }
+    return this._getPreviousShuffling;
+  }
+
+  getCurrentShuffling(): EpochShuffling {
+    if (this._getCurrentShuffling === null) {
+      this._getCurrentShuffling = this.binding.getCurrentShuffling();
+    }
+    return this._getCurrentShuffling;
+  }
+
+  getNextShuffling(): EpochShuffling {
+    if (this._getNextShuffling === null) {
+      this._getNextShuffling = this.binding.getNextShuffling();
+    }
+    return this._getNextShuffling;
+  }
+
+  // Proposer shuffling
+
+  get previousProposers(): ValidatorIndex[] | null {
+    if (this._previousProposers === undefined) {
+      this._previousProposers = this.binding.previousProposers;
+    }
+    return this._previousProposers;
+  }
+
+  get currentProposers(): ValidatorIndex[] {
+    if (this._currentProposers === null) {
+      this._currentProposers = this.binding.currentProposers;
+    }
+    return this._currentProposers;
+  }
+
+  get nextProposers(): ValidatorIndex[] {
+    if (this._nextProposers === null) {
+      this._nextProposers = this.binding.nextProposers;
+    }
+    return this._nextProposers;
+  }
+
+  getBeaconProposer(slot: Slot): ValidatorIndex {
+    let cached = this._getBeaconProposer.get(slot);
+    if (cached === undefined) {
+      cached = this.binding.getBeaconProposer(slot);
+      this._getBeaconProposer.set(slot, cached);
+    }
+    return cached;
+  }
+
+  getBeaconProposerOrNull(slot: Slot): ValidatorIndex | null {
+    if (!this._getBeaconProposerOrNull.has(slot)) {
+      this._getBeaconProposerOrNull.set(slot, this.binding.getBeaconProposerOrNull(slot));
+    }
+    // biome-ignore lint/style/noNonNullAssertion: has() check guarantees a value
+    return this._getBeaconProposerOrNull.get(slot)!;
+  }
+
+  // Validators and balances
+
+  get effectiveBalanceIncrements(): EffectiveBalanceIncrements {
+    if (this._effectiveBalanceIncrements === null) {
+      this._effectiveBalanceIncrements = this.binding.effectiveBalanceIncrements;
+    }
+    return this._effectiveBalanceIncrements;
+  }
+
+  getEffectiveBalanceIncrementsZeroInactive(): EffectiveBalanceIncrements {
+    if (this._getEffectiveBalanceIncrementsZeroInactive === null) {
+      this._getEffectiveBalanceIncrementsZeroInactive = this.binding.getEffectiveBalanceIncrementsZeroInactive();
+    }
+    return this._getEffectiveBalanceIncrementsZeroInactive;
+  }
+
+  getBalance(index: number): number {
+    let cached = this._getBalance.get(index);
+    if (cached === undefined) {
+      cached = this.binding.getBalance(index);
+      this._getBalance.set(index, cached);
+    }
+    return cached;
+  }
+
+  getValidator(index: ValidatorIndex): phase0.Validator {
+    let cached = this._getValidator.get(index);
+    if (cached === undefined) {
+      cached = this.binding.getValidator(index);
+      this._getValidator.set(index, cached);
+    }
+    return cached;
+  }
+
+  getValidatorsByStatus(statuses: Set<string>, currentEpoch: Epoch): phase0.Validator[] {
+    return this.binding.getValidatorsByStatus(statuses, currentEpoch);
+  }
+
+  get validatorCount(): number {
+    if (this._validatorCount === null) {
+      this._validatorCount = this.binding.validatorCount;
+    }
+    return this._validatorCount;
+  }
+
+  get activeValidatorCount(): number {
+    if (this._activeValidatorCount === null) {
+      this._activeValidatorCount = this.binding.activeValidatorCount;
+    }
+    return this._activeValidatorCount;
+  }
+
+  getAllValidators(): phase0.Validator[] {
+    if (this._getAllValidators === null) {
+      this._getAllValidators = this.binding.getAllValidators();
+    }
+    return this._getAllValidators;
+  }
+
+  getAllBalances(): number[] {
+    if (this._getAllBalances === null) {
+      this._getAllBalances = this.binding.getAllBalances();
+    }
+    return this._getAllBalances;
+  }
+
+  // API
+
+  get proposerRewards(): RewardCache {
+    return this.binding.proposerRewards;
+  }
+
+  computeBlockRewards(block: BeaconBlock, proposerRewards?: RewardCache): Promise<rewards.BlockRewards> {
+    return this.binding.computeBlockRewards(block, proposerRewards);
+  }
+
+  computeAttestationsRewards(validatorIds?: (ValidatorIndex | string)[]): Promise<rewards.AttestationsRewards> {
+    return this.binding.computeAttestationsRewards(validatorIds);
+  }
+
+  getLatestWeakSubjectivityCheckpointEpoch(): Epoch {
+    if (this._getLatestWeakSubjectivityCheckpointEpoch === null) {
+      this._getLatestWeakSubjectivityCheckpointEpoch = this.binding.getLatestWeakSubjectivityCheckpointEpoch();
+    }
+    return this._getLatestWeakSubjectivityCheckpointEpoch;
+  }
+
+  // Validation
+
+  getVoluntaryExitValidity(
+    signedVoluntaryExit: phase0.SignedVoluntaryExit,
+    verifySignature: boolean
+  ): VoluntaryExitValidity {
+    return this.binding.getVoluntaryExitValidity(signedVoluntaryExit, verifySignature);
+  }
+
+  isValidVoluntaryExit(signedVoluntaryExit: phase0.SignedVoluntaryExit, verifySignature: boolean): boolean {
+    return this.binding.isValidVoluntaryExit(signedVoluntaryExit, verifySignature);
+  }
+
+  // Proofs
+
+  getFinalizedRootProof(): Uint8Array[] {
+    if (this._getFinalizedRootProof === null) {
+      this._getFinalizedRootProof = this.binding.getFinalizedRootProof();
+    }
+    return this._getFinalizedRootProof;
+  }
+
+  getSingleProof(gindex: bigint): Uint8Array[] {
+    let cached = this._getSingleProof.get(gindex);
+    if (cached === undefined) {
+      cached = this.binding.getSingleProof(gindex);
+      this._getSingleProof.set(gindex, cached);
+    }
+    return cached;
+  }
+
+  createMultiProof(descriptor: Uint8Array): CompactMultiProof {
+    return this.binding.createMultiProof(descriptor);
+  }
+
+  // Fork choice
+
+  computeUnrealizedCheckpoints(): {
+    justifiedCheckpoint: phase0.Checkpoint;
+    finalizedCheckpoint: phase0.Checkpoint;
+  } {
+    if (this._computeUnrealizedCheckpoints === null) {
+      this._computeUnrealizedCheckpoints = this.binding.computeUnrealizedCheckpoints();
+    }
+    return this._computeUnrealizedCheckpoints;
+  }
+
+  computeAnchorCheckpoint(): {checkpoint: phase0.Checkpoint; blockHeader: phase0.BeaconBlockHeader} {
+    if (this._computeAnchorCheckpoint === null) {
+      this._computeAnchorCheckpoint = this.binding.computeAnchorCheckpoint();
+    }
+    return this._computeAnchorCheckpoint;
+  }
+
+  // Backward compatibility
+
+  get clonedCount(): number {
+    return this.binding.clonedCount;
+  }
+
+  get clonedCountWithTransferCache(): number {
+    return this.binding.clonedCountWithTransferCache;
+  }
+
+  get createdWithTransferCache(): boolean {
+    if (this._createdWithTransferCache === null) {
+      this._createdWithTransferCache = this.binding.createdWithTransferCache;
+    }
+    return this._createdWithTransferCache;
+  }
+
+  isStateValidatorsNodesPopulated(): boolean {
+    if (this._isStateValidatorsNodesPopulated === null) {
+      this._isStateValidatorsNodesPopulated = this.binding.isStateValidatorsNodesPopulated();
+    }
+    return this._isStateValidatorsNodesPopulated;
+  }
+
+  // Serialization
+
+  loadOtherState(
+    stateBytes: Uint8Array,
+    seedValidatorsBytes?: Uint8Array,
+    opts?: {preloadValidatorsAndBalances?: boolean}
+  ): IBeaconStateView {
+    return new NativeBeaconStateView(this.binding.loadOtherState(stateBytes, seedValidatorsBytes, opts));
+  }
+
+  toValue(): BeaconState {
+    if (this._toValue === null) {
+      this._toValue = this.binding.toValue();
+    }
+    return this._toValue;
+  }
+
+  serialize(): Uint8Array {
+    if (this._serialize === null) {
+      this._serialize = this.binding.serialize();
+    }
+    return this._serialize;
+  }
+
+  serializedSize(): number {
+    if (this._serializedSize === null) {
+      this._serializedSize = this.binding.serializedSize();
+    }
+    return this._serializedSize;
+  }
+
+  serializeToBytes(output: ByteViews, offset: number): number {
+    return this.binding.serializeToBytes(output, offset);
+  }
+
+  serializeValidators(): Uint8Array {
+    if (this._serializeValidators === null) {
+      this._serializeValidators = this.binding.serializeValidators();
+    }
+    return this._serializeValidators;
+  }
+
+  serializedValidatorsSize(): number {
+    if (this._serializedValidatorsSize === null) {
+      this._serializedValidatorsSize = this.binding.serializedValidatorsSize();
+    }
+    return this._serializedValidatorsSize;
+  }
+
+  serializeValidatorsToBytes(output: ByteViews, offset: number): number {
+    return this.binding.serializeValidatorsToBytes(output, offset);
+  }
+
+  hashTreeRoot(): Uint8Array {
+    if (this._hashTreeRoot === null) {
+      this._hashTreeRoot = this.binding.hashTreeRoot();
+    }
+    return this._hashTreeRoot;
+  }
+
+  // State transition
+
+  stateTransition(
+    signedBlock: SignedBeaconBlock | SignedBlindedBeaconBlock,
+    options: StateTransitionOpts,
+    modules: StateTransitionModules
+  ): IBeaconStateView {
+    return new NativeBeaconStateView(this.binding.stateTransition(signedBlock, options, modules));
+  }
+
+  processSlots(
+    slot: Slot,
+    epochTransitionCacheOpts?: EpochTransitionCacheOpts & {dontTransferCache?: boolean},
+    modules?: StateTransitionModules
+  ): IBeaconStateView {
+    return new NativeBeaconStateView(this.binding.processSlots(slot, epochTransitionCacheOpts, modules));
+  }
+
+  // ─── altair ──────────────────────────────────────────────────────────────
+
+  get previousEpochParticipation(): Uint8Array {
+    if (this._previousEpochParticipation === null) {
+      this._previousEpochParticipation = this.binding.previousEpochParticipation;
+    }
+    return this._previousEpochParticipation;
+  }
+
+  get currentEpochParticipation(): Uint8Array {
+    if (this._currentEpochParticipation === null) {
+      this._currentEpochParticipation = this.binding.currentEpochParticipation;
+    }
+    return this._currentEpochParticipation;
+  }
+
+  getPreviousEpochParticipation(validatorIndex: ValidatorIndex): number {
+    return this.previousEpochParticipation[validatorIndex];
+  }
+
+  getCurrentEpochParticipation(validatorIndex: ValidatorIndex): number {
+    return this.currentEpochParticipation[validatorIndex];
+  }
+
+  get currentSyncCommittee(): altair.SyncCommittee {
+    if (this._currentSyncCommittee === null) {
+      this._currentSyncCommittee = this.binding.currentSyncCommittee;
+    }
+    return this._currentSyncCommittee;
+  }
+
+  get nextSyncCommittee(): altair.SyncCommittee {
+    if (this._nextSyncCommittee === null) {
+      this._nextSyncCommittee = this.binding.nextSyncCommittee;
+    }
+    return this._nextSyncCommittee;
+  }
+
+  get currentSyncCommitteeIndexed(): SyncCommitteeCache {
+    if (this._currentSyncCommitteeIndexed === null) {
+      this._currentSyncCommitteeIndexed = this.binding.currentSyncCommitteeIndexed;
+    }
+    return this._currentSyncCommitteeIndexed;
+  }
+
+  get syncProposerReward(): number {
+    if (this._syncProposerReward === null) {
+      this._syncProposerReward = this.binding.syncProposerReward;
+    }
+    return this._syncProposerReward;
+  }
+
+  getIndexedSyncCommitteeAtEpoch(epoch: Epoch): SyncCommitteeCache {
+    let cached = this._getIndexedSyncCommitteeAtEpoch.get(epoch);
+    if (cached === undefined) {
+      cached = this.binding.getIndexedSyncCommitteeAtEpoch(epoch);
+      this._getIndexedSyncCommitteeAtEpoch.set(epoch, cached);
+    }
+    return cached;
+  }
+
+  getIndexedSyncCommittee(slot: Slot): SyncCommitteeCache {
+    let cached = this._getIndexedSyncCommittee.get(slot);
+    if (cached === undefined) {
+      cached = this.binding.getIndexedSyncCommittee(slot);
+      this._getIndexedSyncCommittee.set(slot, cached);
+    }
+    return cached;
+  }
+
+  computeSyncCommitteeRewards(
+    block: BeaconBlock,
+    validatorIds: (ValidatorIndex | string)[]
+  ): Promise<rewards.SyncCommitteeRewards> {
+    return this.binding.computeSyncCommitteeRewards(block, validatorIds);
+  }
+
+  getSyncCommitteesWitness(): SyncCommitteeWitness {
+    if (this._getSyncCommitteesWitness === null) {
+      this._getSyncCommitteesWitness = this.binding.getSyncCommitteesWitness();
+    }
+    return this._getSyncCommitteesWitness;
+  }
+
+  // ─── bellatrix ───────────────────────────────────────────────────────────
+
+  get latestExecutionPayloadHeader(): ExecutionPayloadHeader {
+    if (this._latestExecutionPayloadHeader === null) {
+      this._latestExecutionPayloadHeader = this.binding.latestExecutionPayloadHeader;
+    }
+    return this._latestExecutionPayloadHeader;
+  }
+
+  get payloadBlockNumber(): number {
+    if (this._payloadBlockNumber === null) {
+      this._payloadBlockNumber = this.binding.payloadBlockNumber;
+    }
+    return this._payloadBlockNumber;
+  }
+
+  get isExecutionStateType(): boolean {
+    if (this._isExecutionStateType === null) {
+      this._isExecutionStateType = this.binding.isExecutionStateType;
+    }
+    return this._isExecutionStateType;
+  }
+
+  get isMergeTransitionComplete(): boolean {
+    if (this._isMergeTransitionComplete === null) {
+      this._isMergeTransitionComplete = this.binding.isMergeTransitionComplete;
+    }
+    return this._isMergeTransitionComplete;
+  }
+
+  isExecutionEnabled(block: BeaconBlock | BlindedBeaconBlock): boolean {
+    return this.binding.isExecutionEnabled(block);
+  }
+
+  // ─── capella ─────────────────────────────────────────────────────────────
+
+  get historicalSummaries(): capella.HistoricalSummaries {
+    if (this._historicalSummaries === null) {
+      this._historicalSummaries = this.binding.historicalSummaries;
+    }
+    return this._historicalSummaries;
+  }
+
+  getExpectedWithdrawals(): {
+    expectedWithdrawals: capella.Withdrawal[];
+    processedBuilderWithdrawalsCount: number;
+    processedPartialWithdrawalsCount: number;
+    processedBuildersSweepCount: number;
+    processedValidatorSweepCount: number;
+  } {
+    if (this._getExpectedWithdrawals === null) {
+      this._getExpectedWithdrawals = this.binding.getExpectedWithdrawals();
+    }
+    return this._getExpectedWithdrawals;
+  }
+
+  // ─── electra ─────────────────────────────────────────────────────────────
+
+  get pendingDeposits(): electra.PendingDeposits {
+    if (this._pendingDeposits === null) {
+      this._pendingDeposits = this.binding.pendingDeposits;
+    }
+    return this._pendingDeposits;
+  }
+
+  get pendingDepositsCount(): number {
+    if (this._pendingDepositsCount === null) {
+      this._pendingDepositsCount = this.binding.pendingDepositsCount;
+    }
+    return this._pendingDepositsCount;
+  }
+
+  get pendingPartialWithdrawals(): electra.PendingPartialWithdrawals {
+    if (this._pendingPartialWithdrawals === null) {
+      this._pendingPartialWithdrawals = this.binding.pendingPartialWithdrawals;
+    }
+    return this._pendingPartialWithdrawals;
+  }
+
+  get pendingPartialWithdrawalsCount(): number {
+    if (this._pendingPartialWithdrawalsCount === null) {
+      this._pendingPartialWithdrawalsCount = this.binding.pendingPartialWithdrawalsCount;
+    }
+    return this._pendingPartialWithdrawalsCount;
+  }
+
+  get pendingConsolidations(): electra.PendingConsolidations {
+    if (this._pendingConsolidations === null) {
+      this._pendingConsolidations = this.binding.pendingConsolidations;
+    }
+    return this._pendingConsolidations;
+  }
+
+  get pendingConsolidationsCount(): number {
+    if (this._pendingConsolidationsCount === null) {
+      this._pendingConsolidationsCount = this.binding.pendingConsolidationsCount;
+    }
+    return this._pendingConsolidationsCount;
+  }
+
+  // ─── fulu ────────────────────────────────────────────────────────────────
+
+  get proposerLookahead(): fulu.ProposerLookahead {
+    if (this._proposerLookahead === null) {
+      this._proposerLookahead = this.binding.proposerLookahead;
+    }
+    return this._proposerLookahead;
+  }
+
+  // ─── gloas ───────────────────────────────────────────────────────────────
+
+  get latestBlockHash(): Bytes32 {
+    if (this._latestBlockHash === null) {
+      this._latestBlockHash = this.binding.latestBlockHash;
+    }
+    return this._latestBlockHash;
+  }
+
+  // executionPayloadAvailability getter is defined near the top of the class.
+
+  get latestExecutionPayloadBid(): ExecutionPayloadBid {
+    if (this._latestExecutionPayloadBid === null) {
+      this._latestExecutionPayloadBid = this.binding.latestExecutionPayloadBid;
+    }
+    return this._latestExecutionPayloadBid;
+  }
+
+  get payloadExpectedWithdrawals(): capella.Withdrawal[] {
+    if (this._payloadExpectedWithdrawals === null) {
+      this._payloadExpectedWithdrawals = this.binding.payloadExpectedWithdrawals;
+    }
+    return this._payloadExpectedWithdrawals;
+  }
+
+  getBuilder(index: BuilderIndex): gloas.Builder {
+    let cached = this._getBuilder.get(index);
+    if (cached === undefined) {
+      cached = this.binding.getBuilder(index);
+      this._getBuilder.set(index, cached);
+    }
+    return cached;
+  }
+
+  canBuilderCoverBid(builderIndex: BuilderIndex, bidAmount: number): boolean {
+    return this.binding.canBuilderCoverBid(builderIndex, bidAmount);
+  }
+
+  getEpochPTCs(epoch: Epoch): Uint32Array[] {
+    let cached = this._getEpochPTCs.get(epoch);
+    if (cached === undefined) {
+      cached = this.binding.getEpochPTCs(epoch);
+      this._getEpochPTCs.set(epoch, cached);
+    }
+    return cached;
+  }
+
+  getIndicesInPayloadTimelinessCommittee(validatorIndex: ValidatorIndex, slot: Slot): number[] {
+    return this.binding.getIndicesInPayloadTimelinessCommittee(validatorIndex, slot);
+  }
+
+  withParentPayloadApplied(executionRequests: electra.ExecutionRequests): IBeaconStateViewGloas {
+    const view = new NativeBeaconStateView(this.binding.withParentPayloadApplied(executionRequests));
+    if (!isStatePostGloas(view)) {
+      throw new Error("Expected gloas state from withParentPayloadApplied");
+    }
+    return view;
+  }
+}
diff --git a/packages/state-transition/src/stateView/stateViewFactory.ts b/packages/state-transition/src/stateView/stateViewFactory.ts
index 122d5cc20364..a7ab2def414f 100644
--- a/packages/state-transition/src/stateView/stateViewFactory.ts
+++ b/packages/state-transition/src/stateView/stateViewFactory.ts
@@ -31,6 +31,7 @@ type NativeOpts = {
 export function createBeaconStateView(opts: NodeJSOpts | NativeOpts): IBeaconStateView {
   if (opts.useNative) {
     throw new Error("Native (Zig) BeaconStateView not yet implemented");
+    // TODO: return a new instance of NativeBeaconStateView
   }
   const {anchorState, config, pubkeyCache} = opts;
   const cachedState = createCachedBeaconState(anchorState, {config, pubkeyCache}, {skipSyncPubkeys: true});
@@ -69,6 +70,7 @@ type RegenNativeOpts = {
 export function createBeaconStateViewForHistoricalRegen(opts: RegenNodeJSOpts | RegenNativeOpts): IBeaconStateView {
   if (opts.useNative) {
     throw new Error("Native (Zig) BeaconStateView not yet implemented");
+    // TODO: return a new instance of NativeBeaconStateView
   }
   const {config, stateBytes} = opts;
   const state = getStateTypeFromBytes(config, stateBytes).deserializeToViewDU(stateBytes);
diff --git a/packages/state-transition/test/unit/stateView/nativeBeaconStateView.test.ts b/packages/state-transition/test/unit/stateView/nativeBeaconStateView.test.ts
new file mode 100644
index 000000000000..f35facad5ad4
--- /dev/null
+++ b/packages/state-transition/test/unit/stateView/nativeBeaconStateView.test.ts
@@ -0,0 +1,85 @@
+import {describe, expect, it} from "vitest";
+import {BitArray} from "@chainsafe/ssz";
+import {IBeaconStateViewNative} from "../../../src/stateView/interface.js";
+import {NativeBeaconStateView} from "../../../src/stateView/nativeBeaconStateView.js";
+
+describe("NativeBeaconStateView", () => {
+  it("lifts the raw {uint8Array, bitLen} into a BitArray for executionPayloadAvailability", () => {
+    // 0b10100101 — bits at indices 0, 2, 5, 7 are set
+    const uint8Array = new Uint8Array([0b10100101]);
+    const bitLen = 8;
+
+    let fetchCount = 0;
+    const binding = {
+      get executionPayloadAvailability() {
+        fetchCount++;
+        return {uint8Array, bitLen};
+      },
+    } as unknown as IBeaconStateViewNative;
+
+    const view = new NativeBeaconStateView(binding);
+    const bits = view.executionPayloadAvailability;
+
+    expect(bits).toBeInstanceOf(BitArray);
+    expect(bits.bitLen).toBe(bitLen);
+    expect(bits.uint8Array).toBe(uint8Array);
+    expect(bits.get(0)).toBe(true);
+    expect(bits.get(1)).toBe(false);
+    expect(bits.get(2)).toBe(true);
+    expect(bits.get(5)).toBe(true);
+    expect(bits.get(7)).toBe(true);
+
+    // Cached: a second access doesn't go back to the binding
+    expect(view.executionPayloadAvailability).toBe(bits);
+    expect(fetchCount).toBe(1);
+  });
+
+  it("caches forwarded properties so the binding is hit once", () => {
+    let forkAccessCount = 0;
+    let latestBlockHeaderAccessCount = 0;
+    const fakeFork = {previousVersion: new Uint8Array(4), currentVersion: new Uint8Array(4), epoch: 0};
+    const fakeHeader = {
+      slot: 0,
+      proposerIndex: 0,
+      parentRoot: new Uint8Array(32),
+      stateRoot: new Uint8Array(32),
+      bodyRoot: new Uint8Array(32),
+    };
+
+    const binding = {
+      get fork() {
+        forkAccessCount++;
+        return fakeFork;
+      },
+      get latestBlockHeader() {
+        latestBlockHeaderAccessCount++;
+        return fakeHeader;
+      },
+    } as unknown as IBeaconStateViewNative;
+
+    const view = new NativeBeaconStateView(binding);
+    expect(view.fork).toBe(fakeFork);
+    expect(view.fork).toBe(fakeFork);
+    expect(view.latestBlockHeader).toBe(fakeHeader);
+    expect(view.latestBlockHeader).toBe(fakeHeader);
+    expect(forkAccessCount).toBe(1);
+    expect(latestBlockHeaderAccessCount).toBe(1);
+  });
+
+  it("delegates pass-through getters and methods to the binding", () => {
+    const binding = {
+      slot: 123,
+      epoch: 4,
+      validatorCount: 17,
+      getBlockRootAtSlot: (slot: number) => new Uint8Array([slot & 0xff]),
+      getBalance: (index: number) => 32_000_000_000 + index,
+    } as unknown as IBeaconStateViewNative;
+
+    const view = new NativeBeaconStateView(binding);
+    expect(view.slot).toBe(123);
+    expect(view.epoch).toBe(4);
+    expect(view.validatorCount).toBe(17);
+    expect(view.getBlockRootAtSlot(7)).toEqual(new Uint8Array([7]));
+    expect(view.getBalance(2)).toBe(32_000_000_002);
+  });
+});