diff --git a/yarn-project/archiver/src/archiver/archiver.test.ts b/yarn-project/archiver/src/archiver/archiver.test.ts
index ea7cbba1883..690c52e4f25 100644
--- a/yarn-project/archiver/src/archiver/archiver.test.ts
+++ b/yarn-project/archiver/src/archiver/archiver.test.ts
@@ -33,6 +33,7 @@ describe('Archiver', () => {
   const registryAddress = EthAddress.ZERO;
   const availabilityOracleAddress = EthAddress.ZERO;
   const blockNumbers = [1, 2, 3];
+
   let publicClient: MockProxy<PublicClient<HttpTransport, Chain>>;
   let archiverStore: ArchiverDataStore;
 
@@ -61,23 +62,28 @@ describe('Archiver', () => {
     const rollupTxs = blocks.map(makeRollupTx);
 
     publicClient.getBlockNumber.mockResolvedValueOnce(2500n).mockResolvedValueOnce(2600n).mockResolvedValueOnce(2700n);
-    // logs should be created in order of how archiver syncs.
-    publicClient.getLogs
-      .mockResolvedValueOnce([makeMessageSentEvent(98n, 1n, 0n), makeMessageSentEvent(99n, 1n, 1n)])
-      .mockResolvedValueOnce([makeTxsPublishedEvent(101n, blocks[0].body.getTxsEffectsHash())])
-      .mockResolvedValueOnce([makeL2BlockProcessedEvent(101n, 1n)])
-      .mockResolvedValueOnce([
+
+    mockGetLogs({
+      messageSent: [makeMessageSentEvent(98n, 1n, 0n), makeMessageSentEvent(99n, 1n, 1n)],
+      txPublished: [makeTxsPublishedEvent(101n, blocks[0].body.getTxsEffectsHash())],
+      l2BlockProcessed: [makeL2BlockProcessedEvent(101n, 1n)],
+      proofVerified: [makeProofVerifiedEvent(102n, 1n)],
+    });
+
+    mockGetLogs({
+      messageSent: [
         makeMessageSentEvent(2504n, 2n, 0n),
         makeMessageSentEvent(2505n, 2n, 1n),
         makeMessageSentEvent(2505n, 2n, 2n),
         makeMessageSentEvent(2506n, 3n, 1n),
-      ])
-      .mockResolvedValueOnce([
+      ],
+      txPublished: [
         makeTxsPublishedEvent(2510n, blocks[1].body.getTxsEffectsHash()),
         makeTxsPublishedEvent(2520n, blocks[2].body.getTxsEffectsHash()),
-      ])
-      .mockResolvedValueOnce([makeL2BlockProcessedEvent(2510n, 2n), makeL2BlockProcessedEvent(2520n, 3n)])
-      .mockResolvedValue([]);
+      ],
+      l2BlockProcessed: [makeL2BlockProcessedEvent(2510n, 2n), makeL2BlockProcessedEvent(2520n, 3n)],
+    });
+
     publicClient.getTransaction.mockResolvedValueOnce(publishTxs[0]);
     publicClient.getTransaction.mockResolvedValueOnce(rollupTxs[0]);
 
@@ -141,6 +147,14 @@ describe('Archiver', () => {
       expect(totalNumUnencryptedLogs).toEqual(expectedTotalNumUnencryptedLogs);
     });
 
+    // Check last proven block number
+    const provenBlockNumber = await archiver.getProvenBlockNumber();
+    expect(provenBlockNumber).toEqual(1);
+
+    // Check getting only proven blocks
+    expect((await archiver.getBlocks(1, 100)).map(b => b.number)).toEqual([1, 2, 3]);
+    expect((await archiver.getBlocks(1, 100, true)).map(b => b.number)).toEqual([1]);
+
     await archiver.stop();
   }, 10_000);
 
@@ -167,15 +181,18 @@ describe('Archiver', () => {
 
     // Here we set the current L1 block number to 102. L1 to L2 messages after this should not be read.
     publicClient.getBlockNumber.mockResolvedValue(102n);
-    // add all of the L1 to L2 messages to the mock
-    publicClient.getLogs
-      .mockResolvedValueOnce([makeMessageSentEvent(66n, 1n, 0n), makeMessageSentEvent(68n, 1n, 1n)])
-      .mockResolvedValueOnce([
+
+    mockGetLogs({
+      messageSent: [makeMessageSentEvent(66n, 1n, 0n), makeMessageSentEvent(68n, 1n, 1n)],
+      txPublished: [
         makeTxsPublishedEvent(70n, blocks[0].body.getTxsEffectsHash()),
         makeTxsPublishedEvent(80n, blocks[1].body.getTxsEffectsHash()),
-      ])
-      .mockResolvedValueOnce([makeL2BlockProcessedEvent(70n, 1n), makeL2BlockProcessedEvent(80n, 2n)])
-      .mockResolvedValue([]);
+      ],
+      l2BlockProcessed: [makeL2BlockProcessedEvent(70n, 1n), makeL2BlockProcessedEvent(80n, 2n)],
+    });
+
+    mockGetLogs({});
+
     publishTxs.slice(0, numL2BlocksInTest).forEach(tx => publicClient.getTransaction.mockResolvedValueOnce(tx));
     rollupTxs.slice(0, numL2BlocksInTest).forEach(tx => publicClient.getTransaction.mockResolvedValueOnce(tx));
 
@@ -191,6 +208,20 @@ describe('Archiver', () => {
 
     await archiver.stop();
   }, 10_000);
+
+  // logs should be created in order of how archiver syncs.
+  const mockGetLogs = (logs: {
+    messageSent?: ReturnType<typeof makeMessageSentEvent>[];
+    txPublished?: ReturnType<typeof makeTxsPublishedEvent>[];
+    l2BlockProcessed?: ReturnType<typeof makeL2BlockProcessedEvent>[];
+    proofVerified?: ReturnType<typeof makeProofVerifiedEvent>[];
+  }) => {
+    publicClient.getLogs
+      .mockResolvedValueOnce(logs.messageSent ?? [])
+      .mockResolvedValueOnce(logs.txPublished ?? [])
+      .mockResolvedValueOnce(logs.l2BlockProcessed ?? [])
+      .mockResolvedValueOnce(logs.proofVerified ?? []);
+  };
 });
 
 /**
@@ -240,6 +271,15 @@ function makeMessageSentEvent(l1BlockNum: bigint, l2BlockNumber: bigint, index:
   } as Log<bigint, number, false, undefined, true, typeof InboxAbi, 'MessageSent'>;
 }
 
+function makeProofVerifiedEvent(l1BlockNum: bigint, l2BlockNumber: bigint) {
+  return {
+    blockNumber: l1BlockNum,
+    args: {
+      blockNumber: l2BlockNumber,
+    },
+  } as Log<bigint, number, false, undefined, true, typeof RollupAbi, 'L2ProofVerified'>;
+}
+
 /**
  * Makes a fake rollup tx for testing purposes.
  * @param block - The L2Block.
diff --git a/yarn-project/archiver/src/archiver/archiver.ts b/yarn-project/archiver/src/archiver/archiver.ts
index b03ce4d2115..b35cd83dcdf 100644
--- a/yarn-project/archiver/src/archiver/archiver.ts
+++ b/yarn-project/archiver/src/archiver/archiver.ts
@@ -28,6 +28,7 @@ import { type EthAddress } from '@aztec/foundation/eth-address';
 import { Fr } from '@aztec/foundation/fields';
 import { type DebugLogger, createDebugLogger } from '@aztec/foundation/log';
 import { RunningPromise } from '@aztec/foundation/running-promise';
+import { RollupAbi } from '@aztec/l1-artifacts';
 import { ClassRegistererAddress } from '@aztec/protocol-contracts/class-registerer';
 import { type TelemetryClient } from '@aztec/telemetry-client';
 import {
@@ -40,7 +41,7 @@ import {
 } from '@aztec/types/contracts';
 
 import groupBy from 'lodash.groupby';
-import { type Chain, type HttpTransport, type PublicClient, createPublicClient, http } from 'viem';
+import { type Chain, type HttpTransport, type PublicClient, createPublicClient, getAbiItem, http } from 'viem';
 
 import { type ArchiverDataStore } from './archiver_store.js';
 import { type ArchiverConfig } from './config.js';
@@ -297,6 +298,28 @@ export class Archiver implements ArchiveSource {
 
     await this.store.addBlocks(retrievedBlocks);
     this.instrumentation.processNewBlocks(retrievedBlocks.retrievedData);
+
+    // Fetch the logs for proven blocks in the block range and update the last proven block number.
+    // Note it's ok to read repeated data here, since we're just using the largest number we see on the logs.
+    await this.updateLastProvenL2Block(l1SynchPoint.blocksSynchedTo, currentL1BlockNumber);
+  }
+
+  private async updateLastProvenL2Block(fromBlock: bigint, toBlock: bigint) {
+    const logs = await this.publicClient.getLogs({
+      address: this.rollupAddress.toString(),
+      fromBlock,
+      toBlock,
+      strict: true,
+      event: getAbiItem({ abi: RollupAbi, name: 'L2ProofVerified' }),
+    });
+
+    const lastLog = logs[logs.length - 1];
+    if (!lastLog) {
+      return;
+    }
+
+    const provenBlockNumber = lastLog.args.blockNumber;
+    await this.store.setProvenL2BlockNumber(Number(provenBlockNumber));
   }
 
   /**
@@ -390,10 +413,14 @@ export class Archiver implements ArchiveSource {
    * Gets up to `limit` amount of L2 blocks starting from `from`.
    * @param from - Number of the first block to return (inclusive).
    * @param limit - The number of blocks to return.
+   * @param proven - If true, only return blocks that have been proven.
    * @returns The requested L2 blocks.
    */
-  public getBlocks(from: number, limit: number): Promise<L2Block[]> {
-    return this.store.getBlocks(from, limit);
+  public async getBlocks(from: number, limit: number, proven?: boolean): Promise<L2Block[]> {
+    const limitWithProven = proven
+      ? Math.min(limit, Math.max((await this.store.getProvenL2BlockNumber()) - from + 1, 0))
+      : limit;
+    return limitWithProven === 0 ? [] : this.store.getBlocks(from, limitWithProven);
   }
 
   /**
@@ -471,6 +498,10 @@ export class Archiver implements ArchiveSource {
     return this.store.getSynchedL2BlockNumber();
   }
 
+  public getProvenBlockNumber(): Promise<number> {
+    return this.store.getProvenL2BlockNumber();
+  }
+
   public getContractClass(id: Fr): Promise<ContractClassPublic | undefined> {
     return this.store.getContractClass(id);
   }
diff --git a/yarn-project/archiver/src/archiver/archiver_store.ts b/yarn-project/archiver/src/archiver/archiver_store.ts
index 9b397b6fa42..7e388cbf52f 100644
--- a/yarn-project/archiver/src/archiver/archiver_store.ts
+++ b/yarn-project/archiver/src/archiver/archiver_store.ts
@@ -148,6 +148,18 @@ export interface ArchiverDataStore {
    */
   getSynchedL2BlockNumber(): Promise<number>;
 
+  /**
+   * Gets the number of the latest proven L2 block processed.
+   * @returns The number of the latest proven L2 block processed.
+   */
+  getProvenL2BlockNumber(): Promise<number>;
+
+  /**
+   * Stores the number of the latest proven L2 block processed.
+   * @param l2BlockNumber - The number of the latest proven L2 block processed.
+   */
+  setProvenL2BlockNumber(l2BlockNumber: number): Promise<void>;
+
   /**
    * Gets the synch point of the archiver
    */
diff --git a/yarn-project/archiver/src/archiver/kv_archiver_store/block_store.ts b/yarn-project/archiver/src/archiver/kv_archiver_store/block_store.ts
index d22537ae824..c054abe73fd 100644
--- a/yarn-project/archiver/src/archiver/kv_archiver_store/block_store.ts
+++ b/yarn-project/archiver/src/archiver/kv_archiver_store/block_store.ts
@@ -22,6 +22,9 @@ export class BlockStore {
   /** Stores L1 block number in which the last processed L2 block was included */
   #lastSynchedL1Block: AztecSingleton<bigint>;
 
+  /** Stores last proven L2 block number */
+  #lastProvenL2Block: AztecSingleton<number>;
+
   /** Index mapping transaction hash (as a string) to its location in a block */
   #txIndex: AztecMap<string, BlockIndexValue>;
 
@@ -39,6 +42,7 @@ export class BlockStore {
     this.#txIndex = db.openMap('archiver_tx_index');
     this.#contractIndex = db.openMap('archiver_contract_index');
     this.#lastSynchedL1Block = db.openSingleton('archiver_last_synched_l1_block');
+    this.#lastProvenL2Block = db.openSingleton('archiver_last_proven_l2_block');
   }
 
   /**
@@ -181,6 +185,14 @@ export class BlockStore {
     return this.#lastSynchedL1Block.get() ?? 0n;
   }
 
+  getProvenL2BlockNumber(): number {
+    return this.#lastProvenL2Block.get() ?? 0;
+  }
+
+  async setProvenL2BlockNumber(blockNumber: number) {
+    await this.#lastProvenL2Block.set(blockNumber);
+  }
+
   #computeBlockRange(start: number, limit: number): Required<Pick<Range<number>, 'start' | 'end'>> {
     if (limit < 1) {
       throw new Error(`Invalid limit: ${limit}`);
diff --git a/yarn-project/archiver/src/archiver/kv_archiver_store/kv_archiver_store.ts b/yarn-project/archiver/src/archiver/kv_archiver_store/kv_archiver_store.ts
index ec8c98e5523..b0a17431953 100644
--- a/yarn-project/archiver/src/archiver/kv_archiver_store/kv_archiver_store.ts
+++ b/yarn-project/archiver/src/archiver/kv_archiver_store/kv_archiver_store.ts
@@ -246,6 +246,14 @@ export class KVArchiverDataStore implements ArchiverDataStore {
     return Promise.resolve(this.#blockStore.getSynchedL2BlockNumber());
   }
 
+  getProvenL2BlockNumber(): Promise<number> {
+    return Promise.resolve(this.#blockStore.getProvenL2BlockNumber());
+  }
+
+  async setProvenL2BlockNumber(blockNumber: number) {
+    await this.#blockStore.setProvenL2BlockNumber(blockNumber);
+  }
+
   /**
    * Gets the last L1 block number processed by the archiver
    */
diff --git a/yarn-project/archiver/src/archiver/memory_archiver_store/memory_archiver_store.ts b/yarn-project/archiver/src/archiver/memory_archiver_store/memory_archiver_store.ts
index bbfbb6e311f..8cad7257baa 100644
--- a/yarn-project/archiver/src/archiver/memory_archiver_store/memory_archiver_store.ts
+++ b/yarn-project/archiver/src/archiver/memory_archiver_store/memory_archiver_store.ts
@@ -84,6 +84,7 @@ export class MemoryArchiverStore implements ArchiverDataStore {
 
   private lastL1BlockNewBlocks: bigint = 0n;
   private lastL1BlockNewMessages: bigint = 0n;
+  private lastProvenL2BlockNumber: number = 0;
 
   constructor(
     /** The max number of logs that can be obtained in 1 "getUnencryptedLogs" call. */
@@ -433,6 +434,15 @@ export class MemoryArchiverStore implements ArchiverDataStore {
     return Promise.resolve(this.l2Blocks[this.l2Blocks.length - 1].number);
   }
 
+  public getProvenL2BlockNumber(): Promise<number> {
+    return Promise.resolve(this.lastProvenL2BlockNumber);
+  }
+
+  public setProvenL2BlockNumber(l2BlockNumber: number): Promise<void> {
+    this.lastProvenL2BlockNumber = l2BlockNumber;
+    return Promise.resolve();
+  }
+
   public getSynchPoint(): Promise<ArchiverL1SynchPoint> {
     return Promise.resolve({
       blocksSynchedTo: this.lastL1BlockNewBlocks,
diff --git a/yarn-project/circuit-types/src/l2_block_downloader/l2_block_downloader.ts b/yarn-project/circuit-types/src/l2_block_downloader/l2_block_downloader.ts
index 081d65633c8..f4d412426a5 100644
--- a/yarn-project/circuit-types/src/l2_block_downloader/l2_block_downloader.ts
+++ b/yarn-project/circuit-types/src/l2_block_downloader/l2_block_downloader.ts
@@ -19,12 +19,23 @@ export class L2BlockDownloader {
   private running = false;
   private from = 0;
   private interruptibleSleep = new InterruptibleSleep();
-  private semaphore: Semaphore;
-  private jobQueue = new SerialQueue();
-  private blockQueue = new MemoryFifo<L2Block[]>();
+  private readonly semaphore: Semaphore;
+  private readonly jobQueue = new SerialQueue();
+  private readonly blockQueue = new MemoryFifo<L2Block[]>();
+  private readonly proven: boolean;
+  private readonly pollIntervalMS: number;
 
-  constructor(private l2BlockSource: L2BlockSource, maxQueueSize: number, private pollIntervalMS = 10000) {
-    this.semaphore = new Semaphore(maxQueueSize);
+  constructor(
+    private l2BlockSource: L2BlockSource,
+    opts: {
+      maxQueueSize: number;
+      proven?: boolean;
+      pollIntervalMS?: number;
+    },
+  ) {
+    this.pollIntervalMS = opts.pollIntervalMS ?? 1000;
+    this.proven = opts.proven ?? false;
+    this.semaphore = new Semaphore(opts.maxQueueSize);
   }
 
   /**
@@ -62,7 +73,7 @@ export class L2BlockDownloader {
   private async collectBlocks() {
     let totalBlocks = 0;
     while (true) {
-      const blocks = await this.l2BlockSource.getBlocks(this.from, 10);
+      const blocks = await this.l2BlockSource.getBlocks(this.from, 10, this.proven);
       if (!blocks.length) {
         return totalBlocks;
       }
diff --git a/yarn-project/circuit-types/src/l2_block_source.ts b/yarn-project/circuit-types/src/l2_block_source.ts
index 78b6078f0fa..45727f2156f 100644
--- a/yarn-project/circuit-types/src/l2_block_source.ts
+++ b/yarn-project/circuit-types/src/l2_block_source.ts
@@ -27,6 +27,12 @@ export interface L2BlockSource {
    */
   getBlockNumber(): Promise<number>;
 
+  /**
+   * Gets the number of the latest L2 block proven seen by the block source implementation.
+   * @returns The number of the latest L2 block proven seen by the block source implementation.
+   */
+  getProvenBlockNumber(): Promise<number>;
+
   /**
    * Gets an l2 block. If a negative number is passed, the block returned is the most recent.
    * @param number - The block number to return (inclusive).
@@ -38,9 +44,10 @@ export interface L2BlockSource {
    * Gets up to `limit` amount of L2 blocks starting from `from`.
    * @param from - Number of the first block to return (inclusive).
    * @param limit - The maximum number of blocks to return.
+   * @param proven - If true, only return blocks that have been proven.
    * @returns The requested L2 blocks.
    */
-  getBlocks(from: number, limit: number): Promise<L2Block[]>;
+  getBlocks(from: number, limit: number, proven?: boolean): Promise<L2Block[]>;
 
   /**
    * Gets a tx effect.
diff --git a/yarn-project/end-to-end/src/composed/integration_l1_publisher.test.ts b/yarn-project/end-to-end/src/composed/integration_l1_publisher.test.ts
index 9c0ee2dfaa4..ca7c4848b72 100644
--- a/yarn-project/end-to-end/src/composed/integration_l1_publisher.test.ts
+++ b/yarn-project/end-to-end/src/composed/integration_l1_publisher.test.ts
@@ -140,6 +140,7 @@ describe('L1Publisher integration', () => {
     const worldStateConfig: WorldStateConfig = {
       worldStateBlockCheckIntervalMS: 10000,
       l2QueueSize: 10,
+      worldStateProvenBlocksOnly: false,
     };
     const worldStateSynchronizer = new ServerWorldStateSynchronizer(tmpStore, builderDb, blockSource, worldStateConfig);
     await worldStateSynchronizer.start();
diff --git a/yarn-project/p2p/src/client/mocks.ts b/yarn-project/p2p/src/client/mocks.ts
index 0d59a161ae0..4b8508811d3 100644
--- a/yarn-project/p2p/src/client/mocks.ts
+++ b/yarn-project/p2p/src/client/mocks.ts
@@ -40,6 +40,10 @@ export class MockBlockSource implements L2BlockSource {
     return Promise.resolve(this.l2Blocks.length - 1);
   }
 
+  public getProvenBlockNumber(): Promise<number> {
+    return this.getBlockNumber();
+  }
+
   /**
    * Gets an l2 block.
    * @param number - The block number to return (inclusive).
diff --git a/yarn-project/p2p/src/client/p2p_client.ts b/yarn-project/p2p/src/client/p2p_client.ts
index 96401b35685..f6fc0737b55 100644
--- a/yarn-project/p2p/src/client/p2p_client.ts
+++ b/yarn-project/p2p/src/client/p2p_client.ts
@@ -126,7 +126,10 @@ export class P2PClient implements P2P {
     private log = createDebugLogger('aztec:p2p'),
   ) {
     const { p2pBlockCheckIntervalMS: checkInterval, p2pL2QueueSize } = getP2PConfigEnvVars();
-    this.blockDownloader = new L2BlockDownloader(l2BlockSource, p2pL2QueueSize, checkInterval);
+    this.blockDownloader = new L2BlockDownloader(l2BlockSource, {
+      maxQueueSize: p2pL2QueueSize,
+      pollIntervalMS: checkInterval,
+    });
     this.synchedBlockNumber = store.openSingleton('p2p_pool_last_l2_block');
   }
 
diff --git a/yarn-project/world-state/src/synchronizer/config.ts b/yarn-project/world-state/src/synchronizer/config.ts
index 5d42930d5b7..7474b7e55e5 100644
--- a/yarn-project/world-state/src/synchronizer/config.ts
+++ b/yarn-project/world-state/src/synchronizer/config.ts
@@ -1,16 +1,13 @@
-/**
- * World State synchronizer configuration values.
- */
+/** World State synchronizer configuration values. */
 export interface WorldStateConfig {
-  /**
-   * The frequency in which to check.
-   */
+  /** The frequency in which to check. */
   worldStateBlockCheckIntervalMS: number;
 
-  /**
-   * Size of queue of L2 blocks to store.
-   */
+  /** Size of queue of L2 blocks to store. */
   l2QueueSize: number;
+
+  /** Whether to follow only the proven chain. */
+  worldStateProvenBlocksOnly: boolean;
 }
 
 /**
@@ -18,10 +15,11 @@ export interface WorldStateConfig {
  * @returns The configuration values for the world state synchronizer.
  */
 export function getConfigEnvVars(): WorldStateConfig {
-  const { WS_BLOCK_CHECK_INTERVAL_MS, WS_L2_BLOCK_QUEUE_SIZE } = process.env;
+  const { WS_BLOCK_CHECK_INTERVAL_MS, WS_L2_BLOCK_QUEUE_SIZE, WS_PROVEN_BLOCKS_ONLY } = process.env;
   const envVars: WorldStateConfig = {
     worldStateBlockCheckIntervalMS: WS_BLOCK_CHECK_INTERVAL_MS ? +WS_BLOCK_CHECK_INTERVAL_MS : 100,
     l2QueueSize: WS_L2_BLOCK_QUEUE_SIZE ? +WS_L2_BLOCK_QUEUE_SIZE : 1000,
+    worldStateProvenBlocksOnly: ['1', 'true'].includes(WS_PROVEN_BLOCKS_ONLY!),
   };
   return envVars;
 }
diff --git a/yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.test.ts b/yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.test.ts
index c7bc0fc5cbf..7e585c12ae7 100644
--- a/yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.test.ts
+++ b/yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.test.ts
@@ -92,6 +92,7 @@ describe('server_world_state_synchronizer', () => {
     const worldStateConfig: WorldStateConfig = {
       worldStateBlockCheckIntervalMS: blockCheckInterval,
       l2QueueSize: 1000,
+      worldStateProvenBlocksOnly: false,
     };
 
     return new ServerWorldStateSynchronizer(
diff --git a/yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.ts b/yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.ts
index 059fddfb4d8..579a0cbf6ba 100644
--- a/yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.ts
+++ b/yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.ts
@@ -48,11 +48,11 @@ export class ServerWorldStateSynchronizer implements WorldStateSynchronizer {
     private log = createDebugLogger('aztec:world_state'),
   ) {
     this.blockNumber = store.openSingleton('world_state_synch_last_block_number');
-    this.l2BlockDownloader = new L2BlockDownloader(
-      l2BlockSource,
-      config.l2QueueSize,
-      config.worldStateBlockCheckIntervalMS,
-    );
+    this.l2BlockDownloader = new L2BlockDownloader(l2BlockSource, {
+      maxQueueSize: config.l2QueueSize,
+      pollIntervalMS: config.worldStateBlockCheckIntervalMS,
+      proven: config.worldStateProvenBlocksOnly,
+    });
   }
 
   public getLatest(): MerkleTreeOperations {