diff --git a/packages/azimuth-watcher/README.md b/packages/azimuth-watcher/README.md
index 235f426..ba07311 100644
--- a/packages/azimuth-watcher/README.md
+++ b/packages/azimuth-watcher/README.md
@@ -81,7 +81,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3001/graphql
 
 * If the watcher is an `active` watcher:
 
@@ -97,7 +97,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3001/graphql
 
   * To watch a contract:
 
diff --git a/packages/censures-watcher/README.md b/packages/censures-watcher/README.md
index 29bf664..b464749 100644
--- a/packages/censures-watcher/README.md
+++ b/packages/censures-watcher/README.md
@@ -81,7 +81,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3002/graphql
 
 * If the watcher is an `active` watcher:
 
@@ -97,7 +97,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3002/graphql
 
   * To watch a contract:
 
diff --git a/packages/claims-watcher/README.md b/packages/claims-watcher/README.md
index a7b0061..855024a 100644
--- a/packages/claims-watcher/README.md
+++ b/packages/claims-watcher/README.md
@@ -81,7 +81,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3003/graphql
 
 * If the watcher is an `active` watcher:
 
@@ -97,7 +97,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3003/graphql
 
   * To watch a contract:
 
diff --git a/packages/conditional-star-release-watcher/README.md b/packages/conditional-star-release-watcher/README.md
index 84e92be..d09c478 100644
--- a/packages/conditional-star-release-watcher/README.md
+++ b/packages/conditional-star-release-watcher/README.md
@@ -81,7 +81,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3004/graphql
 
 * If the watcher is an `active` watcher:
 
@@ -97,7 +97,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3004/graphql
 
   * To watch a contract:
 
diff --git a/packages/polls-watcher/README.md b/packages/polls-watcher/README.md
index c724b53..8b06932 100644
--- a/packages/polls-watcher/README.md
+++ b/packages/polls-watcher/README.md
@@ -81,7 +81,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3008/graphql
 
 * If the watcher is an `active` watcher:
 
@@ -97,7 +97,7 @@ To enable GQL requests caching:
     yarn server
     ```
 
-    GQL console: http://localhost:3009/graphql
+    GQL console: http://localhost:3008/graphql
 
   * To watch a contract:
 
diff --git a/packages/polls-watcher/environments/local.toml b/packages/polls-watcher/environments/local.toml
index a828b8b..c87e5d2 100644
--- a/packages/polls-watcher/environments/local.toml
+++ b/packages/polls-watcher/environments/local.toml
@@ -1,7 +1,8 @@
 [server]
   host = "127.0.0.1"
   port = 3008
-  kind = "lazy"
+  kind = "active"
+  gqlPath = "/graphql"
 
   # Checkpointing state.
   checkpointing = true
@@ -11,15 +12,15 @@
 
   # Enable state creation
   # CAUTION: Disable only if state creation is not desired or can be filled subsequently
-  enableState = true
-
-  # Boolean to filter logs by contract.
-  filterLogs = false
+  enableState = false
 
   # Max block range for which to return events in eventsInRange GQL query.
   # Use -1 for skipping check on block range.
   maxEventsBlockRange = 1000
 
+  # Flag to specify whether RPC endpoint supports block hash as block tag parameter
+  rpcSupportsBlockHashParam = false
+
   # GQL cache settings
   [server.gqlCache]
     enabled = true
@@ -48,8 +49,19 @@
 
 [upstream]
   [upstream.ethServer]
-    gqlApiEndpoint = "http://127.0.0.1:8083/graphql"
-    rpcProviderEndpoint = "http://127.0.0.1:8082"
+    gqlApiEndpoint = "http://127.0.0.1:8082/graphql"
+    rpcProviderEndpoint = "http://127.0.0.1:8081"
+
+    # Boolean flag to specify if rpc-eth-client should be used for RPC endpoint instead of ipld-eth-client (ipld-eth-server GQL client)
+    rpcClient = true
+
+    # Boolean flag to specify if rpcProviderEndpoint is an FEVM RPC endpoint
+    isFEVM = false
+
+    # Boolean flag to filter event logs by contracts
+    filterLogsByAddresses = true
+    # Boolean flag to filter event logs by topics
+    filterLogsByTopics = false
 
   [upstream.cache]
     name = "requests"
@@ -61,6 +73,17 @@
   maxCompletionLagInSecs = 300
   jobDelayInMilliSecs = 100
   eventsInBatch = 50
+  subgraphEventsOrder = true
   blockDelayInMilliSecs = 2000
-  prefetchBlocksInMem = true
-  prefetchBlockCount = 10
+
+  # Boolean to switch between modes of processing events when starting the server.
+  # Setting to true will fetch filtered events and required blocks in a range of blocks and then process them.
+  # Setting to false will fetch blocks consecutively with its events and then process them (Behaviour is followed in realtime processing near head).
+  useBlockRanges = true
+
+  # Block range in which logs are fetched during historical blocks processing
+  historicalLogsBlockRange = 2000
+
+  # Max block range of historical processing after which it waits for completion of events processing
+  # If set to -1 historical processing does not wait for events processing and completes till latest canonical block
+  historicalMaxFetchAhead = 10000
diff --git a/packages/polls-watcher/package.json b/packages/polls-watcher/package.json
index a88ceac..181b7a1 100644
--- a/packages/polls-watcher/package.json
+++ b/packages/polls-watcher/package.json
@@ -38,28 +38,28 @@
   "homepage": "https://github.com/cerc-io/watcher-ts#readme",
   "dependencies": {
     "@apollo/client": "^3.3.19",
+    "@cerc-io/cli": "^0.2.74",
+    "@cerc-io/ipld-eth-client": "^0.2.74",
+    "@cerc-io/solidity-mapper": "^0.2.74",
+    "@cerc-io/util": "^0.2.74",
     "@ethersproject/providers": "^5.4.4",
-    "@cerc-io/cli": "^0.2.40",
-    "@cerc-io/ipld-eth-client": "^0.2.40",
-    "@cerc-io/solidity-mapper": "^0.2.40",
-    "@cerc-io/util": "^0.2.40",
-    "apollo-type-bigint": "^0.1.3",
     "debug": "^4.3.1",
+    "decimal.js": "^10.3.1",
     "ethers": "^5.4.4",
     "graphql": "^15.5.0",
     "json-bigint": "^1.0.0",
     "reflect-metadata": "^0.1.13",
-    "typeorm": "^0.2.32",
-    "yargs": "^17.0.1",
-    "decimal.js": "^10.3.1"
+    "typeorm": "0.2.37",
+    "yargs": "^17.0.1"
   },
   "devDependencies": {
     "@ethersproject/abi": "^5.3.0",
-    "@types/yargs": "^17.0.0",
     "@types/debug": "^4.1.5",
     "@types/json-bigint": "^1.0.0",
+    "@types/yargs": "^17.0.0",
     "@typescript-eslint/eslint-plugin": "^5.47.1",
     "@typescript-eslint/parser": "^5.47.1",
+    "copyfiles": "^2.4.1",
     "eslint": "^8.35.0",
     "eslint-config-semistandard": "^15.0.1",
     "eslint-config-standard": "^16.0.3",
@@ -69,7 +69,6 @@
     "eslint-plugin-standard": "^5.0.0",
     "husky": "^7.0.2",
     "ts-node": "^10.2.1",
-    "typescript": "^5.0.2",
-    "copyfiles": "^2.4.1"
+    "typescript": "^5.0.2"
   }
 }
diff --git a/packages/polls-watcher/src/database.ts b/packages/polls-watcher/src/database.ts
index 388517a..1924e4a 100644
--- a/packages/polls-watcher/src/database.ts
+++ b/packages/polls-watcher/src/database.ts
@@ -280,10 +280,10 @@ export class Database implements DatabaseInterface {
     return this._baseDatabase.saveBlockProgress(repo, block);
   }
 
-  async saveContract (queryRunner: QueryRunner, address: string, kind: string, checkpoint: boolean, startingBlock: number): Promise<Contract> {
+  async saveContract (queryRunner: QueryRunner, address: string, kind: string, checkpoint: boolean, startingBlock: number, context?: any): Promise<Contract> {
     const repo = queryRunner.manager.getRepository(Contract);
 
-    return this._baseDatabase.saveContract(repo, address, kind, checkpoint, startingBlock);
+    return this._baseDatabase.saveContract(repo, address, kind, checkpoint, startingBlock, context);
   }
 
   async updateSyncStatusIndexedBlock (queryRunner: QueryRunner, blockHash: string, blockNumber: number, force = false): Promise<SyncStatus> {
@@ -304,6 +304,18 @@ export class Database implements DatabaseInterface {
     return this._baseDatabase.updateSyncStatusChainHead(repo, blockHash, blockNumber, force);
   }
 
+  async updateSyncStatusProcessedBlock (queryRunner: QueryRunner, blockHash: string, blockNumber: number, force = false): Promise<SyncStatus> {
+    const repo = queryRunner.manager.getRepository(SyncStatus);
+
+    return this._baseDatabase.updateSyncStatusProcessedBlock(repo, blockHash, blockNumber, force);
+  }
+
+  async updateSyncStatusIndexingError (queryRunner: QueryRunner, hasIndexingError: boolean): Promise<SyncStatus | undefined> {
+    const repo = queryRunner.manager.getRepository(SyncStatus);
+
+    return this._baseDatabase.updateSyncStatusIndexingError(repo, hasIndexingError);
+  }
+
   async getSyncStatus (queryRunner: QueryRunner): Promise<SyncStatus | undefined> {
     const repo = queryRunner.manager.getRepository(SyncStatus);
 
diff --git a/packages/polls-watcher/src/entity/BlockProgress.ts b/packages/polls-watcher/src/entity/BlockProgress.ts
index e744aae..ded4a86 100644
--- a/packages/polls-watcher/src/entity/BlockProgress.ts
+++ b/packages/polls-watcher/src/entity/BlockProgress.ts
@@ -13,8 +13,8 @@ export class BlockProgress implements BlockProgressInterface {
   @PrimaryGeneratedColumn()
     id!: number;
 
-  @Column('varchar')
-    cid!: string;
+  @Column('varchar', { nullable: true })
+    cid!: string | null;
 
   @Column('varchar', { length: 66 })
     blockHash!: string;
diff --git a/packages/polls-watcher/src/entity/Contract.ts b/packages/polls-watcher/src/entity/Contract.ts
index de66b38..e4defa8 100644
--- a/packages/polls-watcher/src/entity/Contract.ts
+++ b/packages/polls-watcher/src/entity/Contract.ts
@@ -21,4 +21,7 @@ export class Contract {
 
   @Column('integer')
     startingBlock!: number;
+
+  @Column('jsonb', { nullable: true })
+    context!: Record<string, { data: any, type: number }>;
 }
diff --git a/packages/polls-watcher/src/entity/StateSyncStatus.ts b/packages/polls-watcher/src/entity/StateSyncStatus.ts
index c795212..1535eb4 100644
--- a/packages/polls-watcher/src/entity/StateSyncStatus.ts
+++ b/packages/polls-watcher/src/entity/StateSyncStatus.ts
@@ -12,6 +12,6 @@ export class StateSyncStatus {
   @Column('integer')
     latestIndexedBlockNumber!: number;
 
-  @Column('integer', { nullable: true })
+  @Column('integer')
     latestCheckpointBlockNumber!: number;
 }
diff --git a/packages/polls-watcher/src/entity/SyncStatus.ts b/packages/polls-watcher/src/entity/SyncStatus.ts
index 19d0dfa..cc13c70 100644
--- a/packages/polls-watcher/src/entity/SyncStatus.ts
+++ b/packages/polls-watcher/src/entity/SyncStatus.ts
@@ -22,6 +22,12 @@ export class SyncStatus implements SyncStatusInterface {
   @Column('integer')
     latestIndexedBlockNumber!: number;
 
+  @Column('varchar', { length: 66 })
+    latestProcessedBlockHash!: string;
+
+  @Column('integer')
+    latestProcessedBlockNumber!: number;
+
   @Column('varchar', { length: 66 })
     latestCanonicalBlockHash!: string;
 
@@ -33,4 +39,7 @@ export class SyncStatus implements SyncStatusInterface {
 
   @Column('integer')
     initialIndexedBlockNumber!: number;
+
+  @Column('boolean', { default: false })
+    hasIndexingError!: boolean;
 }
diff --git a/packages/polls-watcher/src/gql/queries/getSyncStatus.gql b/packages/polls-watcher/src/gql/queries/getSyncStatus.gql
index 2f80efd..48175b4 100644
--- a/packages/polls-watcher/src/gql/queries/getSyncStatus.gql
+++ b/packages/polls-watcher/src/gql/queries/getSyncStatus.gql
@@ -4,5 +4,9 @@ query getSyncStatus{
         latestIndexedBlockNumber
         latestCanonicalBlockHash
         latestCanonicalBlockNumber
+        initialIndexedBlockHash
+        initialIndexedBlockNumber
+        latestProcessedBlockHash
+        latestProcessedBlockNumber
     }
 }
\ No newline at end of file
diff --git a/packages/polls-watcher/src/gql/queries/index.ts b/packages/polls-watcher/src/gql/queries/index.ts
index 8708e36..1bfd022 100644
--- a/packages/polls-watcher/src/gql/queries/index.ts
+++ b/packages/polls-watcher/src/gql/queries/index.ts
@@ -10,6 +10,6 @@ export const getDocumentProposalCount = fs.readFileSync(path.join(__dirname, 'ge
 export const getDocumentMajorities = fs.readFileSync(path.join(__dirname, 'getDocumentMajorities.gql'), 'utf8');
 export const hasVotedOnUpgradePoll = fs.readFileSync(path.join(__dirname, 'hasVotedOnUpgradePoll.gql'), 'utf8');
 export const hasVotedOnDocumentPoll = fs.readFileSync(path.join(__dirname, 'hasVotedOnDocumentPoll.gql'), 'utf8');
-export const getSyncStatus = fs.readFileSync(path.join(__dirname, 'getSyncStatus.gql'), 'utf8');
 export const getStateByCID = fs.readFileSync(path.join(__dirname, 'getStateByCID.gql'), 'utf8');
 export const getState = fs.readFileSync(path.join(__dirname, 'getState.gql'), 'utf8');
+export const getSyncStatus = fs.readFileSync(path.join(__dirname, 'getSyncStatus.gql'), 'utf8');
diff --git a/packages/polls-watcher/src/indexer.ts b/packages/polls-watcher/src/indexer.ts
index 550826d..36933b3 100644
--- a/packages/polls-watcher/src/indexer.ts
+++ b/packages/polls-watcher/src/indexer.ts
@@ -6,11 +6,10 @@ import assert from 'assert';
 import { DeepPartial, FindConditions, FindManyOptions } from 'typeorm';
 import debug from 'debug';
 import JSONbig from 'json-bigint';
-import { ethers } from 'ethers';
+import { ethers, constants } from 'ethers';
 
 import { JsonFragment } from '@ethersproject/abi';
 import { BaseProvider } from '@ethersproject/providers';
-import { EthClient } from '@cerc-io/ipld-eth-client';
 import { MappingKey, StorageLayout } from '@cerc-io/solidity-mapper';
 import {
   Indexer as BaseIndexer,
@@ -25,7 +24,12 @@ import {
   ResultEvent,
   getResultEvent,
   DatabaseInterface,
-  Clients
+  Clients,
+  EthClient,
+  UpstreamConfig,
+  EthFullBlock,
+  EthFullTransaction,
+  ExtraEventData
 } from '@cerc-io/util';
 
 import PollsArtifacts from './artifacts/Polls.json';
@@ -50,36 +54,60 @@ export class Indexer implements IndexerInterface {
   _ethProvider: BaseProvider;
   _baseIndexer: BaseIndexer;
   _serverConfig: ServerConfig;
+  _upstreamConfig: UpstreamConfig;
 
   _abiMap: Map<string, JsonFragment[]>;
   _storageLayoutMap: Map<string, StorageLayout>;
   _contractMap: Map<string, ethers.utils.Interface>;
+  eventSignaturesMap: Map<string, string[]>;
 
-  constructor (serverConfig: ServerConfig, db: DatabaseInterface, clients: Clients, ethProvider: BaseProvider, jobQueue: JobQueue) {
+  constructor (
+    config: {
+      server: ServerConfig;
+      upstream: UpstreamConfig;
+    },
+    db: DatabaseInterface,
+    clients: Clients,
+    ethProvider: BaseProvider,
+    jobQueue: JobQueue
+  ) {
     assert(db);
     assert(clients.ethClient);
 
     this._db = db as Database;
     this._ethClient = clients.ethClient;
     this._ethProvider = ethProvider;
-    this._serverConfig = serverConfig;
-    this._baseIndexer = new BaseIndexer(this._serverConfig, this._db, this._ethClient, this._ethProvider, jobQueue);
+    this._serverConfig = config.server;
+    this._upstreamConfig = config.upstream;
+    this._baseIndexer = new BaseIndexer(config, this._db, this._ethClient, this._ethProvider, jobQueue);
 
     this._abiMap = new Map();
     this._storageLayoutMap = new Map();
     this._contractMap = new Map();
+    this.eventSignaturesMap = new Map();
 
     const { abi: PollsABI } = PollsArtifacts;
 
     assert(PollsABI);
     this._abiMap.set(KIND_POLLS, PollsABI);
-    this._contractMap.set(KIND_POLLS, new ethers.utils.Interface(PollsABI));
+
+    const PollsContractInterface = new ethers.utils.Interface(PollsABI);
+    this._contractMap.set(KIND_POLLS, PollsContractInterface);
+
+    const PollsEventSignatures = Object.values(PollsContractInterface.events).map(value => {
+      return PollsContractInterface.getEventTopic(value);
+    });
+    this.eventSignaturesMap.set(KIND_POLLS, PollsEventSignatures);
   }
 
   get serverConfig (): ServerConfig {
     return this._serverConfig;
   }
 
+  get upstreamConfig (): UpstreamConfig {
+    return this._upstreamConfig;
+  }
+
   get storageLayoutMap (): Map<string, StorageLayout> {
     return this._storageLayoutMap;
   }
@@ -416,16 +444,17 @@ export class Indexer implements IndexerInterface {
     await this._baseIndexer.removeStates(blockNumber, kind);
   }
 
-  async triggerIndexingOnEvent (event: Event): Promise<void> {
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  async triggerIndexingOnEvent (event: Event, extraData: ExtraEventData): Promise<void> {
     const resultEvent = this.getResultEvent(event);
 
     // Call custom hook function for indexing on event.
     await handleEvent(this, resultEvent);
   }
 
-  async processEvent (event: Event): Promise<void> {
+  async processEvent (event: Event, extraData: ExtraEventData): Promise<void> {
     // Trigger indexing of data based on the event.
-    await this.triggerIndexingOnEvent(event);
+    await this.triggerIndexingOnEvent(event, extraData);
   }
 
   async processBlock (blockProgress: BlockProgress): Promise<void> {
@@ -456,7 +485,11 @@ export class Indexer implements IndexerInterface {
     return this._db.getStateSyncStatus();
   }
 
-  async updateStateSyncStatusIndexedBlock (blockNumber: number, force?: boolean): Promise<StateSyncStatus> {
+  async updateStateSyncStatusIndexedBlock (blockNumber: number, force?: boolean): Promise<StateSyncStatus | undefined> {
+    if (!this._serverConfig.enableState) {
+      return;
+    }
+
     const dbTx = await this._db.createTransactionRunner();
     let res;
 
@@ -490,10 +523,14 @@ export class Indexer implements IndexerInterface {
     return res;
   }
 
-  async getLatestCanonicalBlock (): Promise<BlockProgress> {
+  async getLatestCanonicalBlock (): Promise<BlockProgress | undefined> {
     const syncStatus = await this.getSyncStatus();
     assert(syncStatus);
 
+    if (syncStatus.latestCanonicalBlockHash === constants.HashZero) {
+      return;
+    }
+
     const latestCanonicalBlock = await this.getBlockProgress(syncStatus.latestCanonicalBlockHash);
     assert(latestCanonicalBlock);
 
@@ -504,8 +541,8 @@ export class Indexer implements IndexerInterface {
     return this._baseIndexer.getLatestStateIndexedBlock();
   }
 
-  async watchContract (address: string, kind: string, checkpoint: boolean, startingBlock: number): Promise<void> {
-    return this._baseIndexer.watchContract(address, kind, checkpoint, startingBlock);
+  async watchContract (address: string, kind: string, checkpoint: boolean, startingBlock: number, context?: any): Promise<void> {
+    return this._baseIndexer.watchContract(address, kind, checkpoint, startingBlock, context);
   }
 
   updateStateStatusMap (address: string, stateStatus: StateStatus): void {
@@ -520,6 +557,10 @@ export class Indexer implements IndexerInterface {
     return this._baseIndexer.saveEventEntity(dbEvent);
   }
 
+  async saveEvents (dbEvents: Event[]): Promise<void> {
+    return this._baseIndexer.saveEvents(dbEvents);
+  }
+
   async getEventsByFilter (blockHash: string, contract?: string, name?: string): Promise<Array<Event>> {
     return this._baseIndexer.getEventsByFilter(blockHash, contract, name);
   }
@@ -528,6 +569,10 @@ export class Indexer implements IndexerInterface {
     return this._baseIndexer.isWatchedContract(address);
   }
 
+  getWatchedContracts (): Contract[] {
+    return this._baseIndexer.getWatchedContracts();
+  }
+
   getContractsByKind (kind: string): Contract[] {
     return this._baseIndexer.getContractsByKind(kind);
   }
@@ -562,6 +607,14 @@ export class Indexer implements IndexerInterface {
     return syncStatus;
   }
 
+  async updateSyncStatusProcessedBlock (blockHash: string, blockNumber: number, force = false): Promise<SyncStatus> {
+    return this._baseIndexer.updateSyncStatusProcessedBlock(blockHash, blockNumber, force);
+  }
+
+  async updateSyncStatusIndexingError (hasIndexingError: boolean): Promise<SyncStatus | undefined> {
+    return this._baseIndexer.updateSyncStatusIndexingError(hasIndexingError);
+  }
+
   async getEvent (id: string): Promise<Event | undefined> {
     return this._baseIndexer.getEvent(id);
   }
@@ -578,7 +631,24 @@ export class Indexer implements IndexerInterface {
     return this._baseIndexer.getBlocksAtHeight(height, isPruned);
   }
 
-  async saveBlockAndFetchEvents (block: DeepPartial<BlockProgress>): Promise<[BlockProgress, DeepPartial<Event>[]]> {
+  async fetchAndSaveFilteredEventsAndBlocks (startBlock: number, endBlock: number): Promise<{
+    blockProgress: BlockProgress,
+    events: DeepPartial<Event>[],
+    ethFullBlock: EthFullBlock;
+    ethFullTransactions: EthFullTransaction[];
+  }[]> {
+    return this._baseIndexer.fetchAndSaveFilteredEventsAndBlocks(startBlock, endBlock, this.eventSignaturesMap, this.parseEventNameAndArgs.bind(this));
+  }
+
+  async fetchEventsForContracts (blockHash: string, blockNumber: number, addresses: string[]): Promise<DeepPartial<Event>[]> {
+    return this._baseIndexer.fetchEventsForContracts(blockHash, blockNumber, addresses, this.eventSignaturesMap, this.parseEventNameAndArgs.bind(this));
+  }
+
+  async saveBlockAndFetchEvents (block: DeepPartial<BlockProgress>): Promise<[
+    BlockProgress,
+    DeepPartial<Event>[],
+    EthFullTransaction[]
+  ]> {
     return this._saveBlockAndFetchEvents(block);
   }
 
@@ -607,17 +677,26 @@ export class Indexer implements IndexerInterface {
     await this._baseIndexer.resetWatcherToBlock(blockNumber, entities);
   }
 
+  async clearProcessedBlockData (block: BlockProgress): Promise<void> {
+    const entities = [...ENTITIES];
+    await this._baseIndexer.clearProcessedBlockData(block, entities);
+  }
+
   async _saveBlockAndFetchEvents ({
     cid: blockCid,
     blockHash,
     blockNumber,
     blockTimestamp,
     parentHash
-  }: DeepPartial<BlockProgress>): Promise<[BlockProgress, DeepPartial<Event>[]]> {
+  }: DeepPartial<BlockProgress>): Promise<[
+    BlockProgress,
+    DeepPartial<Event>[],
+    EthFullTransaction[]
+  ]> {
     assert(blockHash);
     assert(blockNumber);
 
-    const dbEvents = await this._baseIndexer.fetchEvents(blockHash, blockNumber, this.parseEventNameAndArgs.bind(this));
+    const { events: dbEvents, transactions } = await this._baseIndexer.fetchEvents(blockHash, blockNumber, this.eventSignaturesMap, this.parseEventNameAndArgs.bind(this));
 
     const dbTx = await this._db.createTransactionRunner();
     try {
@@ -634,7 +713,7 @@ export class Indexer implements IndexerInterface {
       await dbTx.commitTransaction();
       console.timeEnd(`time:indexer#_saveBlockAndFetchEvents-db-save-${blockNumber}`);
 
-      return [blockProgress, []];
+      return [blockProgress, [], transactions];
     } catch (error) {
       await dbTx.rollbackTransaction();
       throw error;
diff --git a/packages/polls-watcher/src/job-runner.ts b/packages/polls-watcher/src/job-runner.ts
index 27cfa69..b5aa6df 100644
--- a/packages/polls-watcher/src/job-runner.ts
+++ b/packages/polls-watcher/src/job-runner.ts
@@ -20,6 +20,7 @@ export const main = async (): Promise<any> => {
 
   await jobRunnerCmd.exec(async (jobRunner: JobRunner): Promise<void> => {
     await jobRunner.subscribeBlockProcessingQueue();
+    await jobRunner.subscribeHistoricalProcessingQueue();
     await jobRunner.subscribeEventProcessingQueue();
     await jobRunner.subscribeBlockCheckpointQueue();
     await jobRunner.subscribeHooksQueue();
diff --git a/packages/polls-watcher/src/resolvers.ts b/packages/polls-watcher/src/resolvers.ts
index 4214d79..62884b7 100644
--- a/packages/polls-watcher/src/resolvers.ts
+++ b/packages/polls-watcher/src/resolvers.ts
@@ -3,13 +3,8 @@
 //
 
 import assert from 'assert';
-import BigInt from 'apollo-type-bigint';
 import debug from 'debug';
-import Decimal from 'decimal.js';
-import {
-  GraphQLScalarType,
-  GraphQLResolveInfo
-} from 'graphql';
+import { GraphQLResolveInfo } from 'graphql';
 
 import {
   ValueResult,
@@ -17,6 +12,8 @@ import {
   gqlQueryCount,
   getResultState,
   IndexerInterface,
+  GraphQLBigInt,
+  GraphQLBigDecimal,
   EventWatcher,
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
   setGQLCacheHints
@@ -33,20 +30,9 @@ export const createResolvers = async (indexerArg: IndexerInterface, eventWatcher
   const gqlCacheConfig = indexer.serverConfig.gqlCache;
 
   return {
-    BigInt: new BigInt('bigInt'),
+    BigInt: GraphQLBigInt,
 
-    BigDecimal: new GraphQLScalarType({
-      name: 'BigDecimal',
-      description: 'BigDecimal custom scalar type',
-      parseValue (value) {
-        // value from the client
-        return new Decimal(value);
-      },
-      serialize (value: Decimal) {
-        // value sent to the client
-        return value.toFixed();
-      }
-    }),
+    BigDecimal: GraphQLBigDecimal,
 
     Event: {
       __resolveType: (obj: any) => {
@@ -217,9 +203,14 @@ export const createResolvers = async (indexerArg: IndexerInterface, eventWatcher
         gqlTotalQueryCount.inc(1);
         gqlQueryCount.labels('eventsInRange').inc(1);
 
-        const { expected, actual } = await indexer.getProcessedBlockCountForRange(fromBlockNumber, toBlockNumber);
-        if (expected !== actual) {
-          throw new Error(`Range not available, expected ${expected}, got ${actual} blocks in range`);
+        const syncStatus = await indexer.getSyncStatus();
+
+        if (!syncStatus) {
+          throw new Error('No blocks processed yet');
+        }
+
+        if ((fromBlockNumber < syncStatus.initialIndexedBlockNumber) || (toBlockNumber > syncStatus.latestProcessedBlockNumber)) {
+          throw new Error(`Block range should be between ${syncStatus.initialIndexedBlockNumber} and ${syncStatus.latestProcessedBlockNumber}`);
         }
 
         const events = await indexer.getEventsInRange(fromBlockNumber, toBlockNumber);
diff --git a/packages/polls-watcher/src/schema.gql b/packages/polls-watcher/src/schema.gql
index ea6c4e3..c1ef0ba 100644
--- a/packages/polls-watcher/src/schema.gql
+++ b/packages/polls-watcher/src/schema.gql
@@ -16,7 +16,7 @@ type Proof {
 }
 
 type _Block_ {
-  cid: String!
+  cid: String
   hash: String!
   number: Int!
   timestamp: Int!
@@ -81,13 +81,6 @@ type ResultBoolean {
   proof: Proof
 }
 
-type SyncStatus {
-  latestIndexedBlockHash: String!
-  latestIndexedBlockNumber: Int!
-  latestCanonicalBlockHash: String!
-  latestCanonicalBlockNumber: Int!
-}
-
 type ResultState {
   block: _Block_!
   contractAddress: String!
@@ -96,6 +89,17 @@ type ResultState {
   data: String!
 }
 
+type SyncStatus {
+  latestIndexedBlockHash: String!
+  latestIndexedBlockNumber: Int!
+  latestCanonicalBlockHash: String!
+  latestCanonicalBlockNumber: Int!
+  initialIndexedBlockHash: String!
+  initialIndexedBlockNumber: Int!
+  latestProcessedBlockHash: String!
+  latestProcessedBlockNumber: Int!
+}
+
 type Query {
   events(blockHash: String!, contractAddress: String!, name: String): [ResultEvent!]
   eventsInRange(fromBlockNumber: Int!, toBlockNumber: Int!): [ResultEvent!]
@@ -106,9 +110,9 @@ type Query {
   getDocumentMajorities(blockHash: String!, contractAddress: String!): ResultStringArray!
   hasVotedOnUpgradePoll(blockHash: String!, contractAddress: String!, _galaxy: Int!, _proposal: String!): ResultBoolean!
   hasVotedOnDocumentPoll(blockHash: String!, contractAddress: String!, _galaxy: Int!, _proposal: String!): ResultBoolean!
-  getSyncStatus: SyncStatus
   getStateByCID(cid: String!): ResultState
   getState(blockHash: String!, contractAddress: String!, kind: String): ResultState
+  getSyncStatus: SyncStatus
 }
 
 type Mutation {
diff --git a/yarn.lock b/yarn.lock
index 54ced74..45d14db 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -183,17 +183,6 @@
     chalk "^2.0.0"
     js-tokens "^4.0.0"
 
-"@cerc-io/cache@^0.2.40":
-  version "0.2.40"
-  resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fcache/-/0.2.40/cache-0.2.40.tgz#b44cc8323d1e1a7f6761efdca61b00d4f337823e"
-  integrity sha512-tQ5kYLTpwX/40hpNg1eEnojHtq2dl0nfkW78+lFUXiqtjc+sVFvO6nIqKLI8NBkeCMWFg3KyNDmv86xn/0mPgw==
-  dependencies:
-    canonical-json "^0.0.4"
-    debug "^4.3.1"
-    ethers "^5.4.4"
-    fs-extra "^10.0.0"
-    level "^7.0.0"
-
 "@cerc-io/cache@^0.2.74":
   version "0.2.74"
   resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fcache/-/0.2.74/cache-0.2.74.tgz#035805fc289aa02cbc34e5ecf14e3728fa288763"
@@ -205,25 +194,6 @@
     fs-extra "^10.0.0"
     level "^7.0.0"
 
-"@cerc-io/cli@^0.2.40":
-  version "0.2.40"
-  resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fcli/-/0.2.40/cli-0.2.40.tgz#9116f1e190910df4aa1480e9ae28380ff7d59e4b"
-  integrity sha512-Sxxy86SjSb0QgCbEHdr9xFwhbfGEqv+lG3HBRizCobaIYGZveIWCFU34tzpQJCoEYorRJybkC1uqsJDDCUMCAg==
-  dependencies:
-    "@cerc-io/peer" "^0.2.40"
-    "@cerc-io/util" "^0.2.40"
-    "@ethersproject/providers" "^5.4.4"
-    "@graphql-tools/utils" "^9.1.1"
-    "@ipld/dag-cbor" "^8.0.0"
-    "@libp2p/interface-peer-id" "^2.0.0"
-    apollo-server-express "^3.11.1"
-    debug "^4.3.1"
-    express "^4.18.2"
-    graphql-subscriptions "^2.0.0"
-    reflect-metadata "^0.1.13"
-    typeorm "^0.2.32"
-    yargs "^17.0.1"
-
 "@cerc-io/cli@^0.2.74":
   version "0.2.74"
   resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fcli/-/0.2.74/cli-0.2.74.tgz#db13cf6a2cacd144e5dfba80929a6511be27afe9"
@@ -252,22 +222,6 @@
     typeorm "0.2.37"
     yargs "^17.0.1"
 
-"@cerc-io/ipld-eth-client@^0.2.40":
-  version "0.2.40"
-  resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fipld-eth-client/-/0.2.40/ipld-eth-client-0.2.40.tgz#aa3a01af6dcb6591388616d9c7e55ce721a44621"
-  integrity sha512-Oc+WkdeHkLG9fk7Uwwa4YHqBreYAEWu9CnRmqWm9sMwi48bnSEyDDzpuzUvg+R8RenSLlqaH/d9cBqhN9bInKw==
-  dependencies:
-    "@apollo/client" "^3.7.1"
-    "@cerc-io/cache" "^0.2.40"
-    cross-fetch "^3.1.4"
-    debug "^4.3.1"
-    ethers "^5.4.4"
-    graphql "^15.5.0"
-    graphql-ws "^5.11.2"
-    left-pad "^1.3.0"
-    ws "^8.11.0"
-    zen-observable-ts "^1.1.0"
-
 "@cerc-io/ipld-eth-client@^0.2.74":
   version "0.2.74"
   resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fipld-eth-client/-/0.2.74/ipld-eth-client-0.2.74.tgz#f96acb32937a035de2a54e32153420581c9b5375"
@@ -285,78 +239,6 @@
     ws "^8.11.0"
     zen-observable-ts "^1.1.0"
 
-"@cerc-io/libp2p@0.42.2-laconic-0.1.3":
-  version "0.42.2-laconic-0.1.3"
-  resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Flibp2p/-/0.42.2-laconic-0.1.3/libp2p-0.42.2-laconic-0.1.3.tgz#482c88e135141788fdd201fc27fb4f1bdc954f53"
-  integrity sha512-D8nBtFVB2xUN/QRCSHQVSoJBAk2nH4caqROpWUipRxiDgeoBVpTqYEM9fBzOln6/Yl3BtBxR/fgyaZPTSJQdrg==
-  dependencies:
-    "@achingbrain/nat-port-mapper" "^1.0.3"
-    "@libp2p/crypto" "^1.0.4"
-    "@libp2p/interface-address-manager" "^2.0.0"
-    "@libp2p/interface-connection" "^3.0.2"
-    "@libp2p/interface-connection-encrypter" "^3.0.1"
-    "@libp2p/interface-connection-manager" "^1.1.1"
-    "@libp2p/interface-content-routing" "^2.0.0"
-    "@libp2p/interface-dht" "^2.0.0"
-    "@libp2p/interface-keychain" "^2.0.4"
-    "@libp2p/interface-libp2p" "^1.0.0"
-    "@libp2p/interface-metrics" "^4.0.0"
-    "@libp2p/interface-peer-discovery" "^1.0.1"
-    "@libp2p/interface-peer-id" "^2.0.0"
-    "@libp2p/interface-peer-info" "^1.0.3"
-    "@libp2p/interface-peer-routing" "^1.0.1"
-    "@libp2p/interface-peer-store" "^1.2.2"
-    "@libp2p/interface-pubsub" "^3.0.0"
-    "@libp2p/interface-registrar" "^2.0.3"
-    "@libp2p/interface-stream-muxer" "^3.0.0"
-    "@libp2p/interface-transport" "^2.1.0"
-    "@libp2p/interfaces" "^3.0.3"
-    "@libp2p/keychain" "^1.0.0"
-    "@libp2p/logger" "^2.0.1"
-    "@libp2p/multistream-select" "^3.0.0"
-    "@libp2p/peer-collections" "^3.0.0"
-    "@libp2p/peer-id" "^2.0.0"
-    "@libp2p/peer-id-factory" "^2.0.0"
-    "@libp2p/peer-record" "^5.0.0"
-    "@libp2p/peer-store" "^6.0.0"
-    "@libp2p/tracked-map" "^3.0.0"
-    "@libp2p/utils" "^3.0.2"
-    "@libp2p/webrtc-peer" "^2.0.2"
-    "@multiformats/mafmt" "^11.0.2"
-    "@multiformats/multiaddr" "^11.0.0"
-    abortable-iterator "^4.0.2"
-    any-signal "^3.0.0"
-    datastore-core "^8.0.1"
-    err-code "^3.0.1"
-    interface-datastore "^7.0.0"
-    it-all "^2.0.0"
-    it-drain "^2.0.0"
-    it-filter "^2.0.0"
-    it-first "^2.0.0"
-    it-handshake "^4.1.2"
-    it-length-prefixed "^8.0.2"
-    it-map "^2.0.0"
-    it-merge "^2.0.0"
-    it-pair "^2.0.2"
-    it-pipe "^2.0.3"
-    it-pushable "^3.1.2"
-    it-sort "^2.0.1"
-    it-stream-types "^1.0.4"
-    merge-options "^3.0.4"
-    multiformats "^11.0.0"
-    p-fifo "^1.0.0"
-    p-settle "^5.0.0"
-    private-ip "^3.0.0"
-    protons-runtime "^4.0.1"
-    rate-limiter-flexible "^2.3.11"
-    retimer "^3.0.0"
-    set-delayed-interval "^1.0.0"
-    timeout-abort-controller "^3.0.0"
-    uint8arraylist "^2.3.2"
-    uint8arrays "^4.0.2"
-    wherearewe "^2.0.0"
-    xsalsa20 "^1.1.0"
-
 "@cerc-io/libp2p@0.42.2-laconic-0.1.4", "@cerc-io/libp2p@^0.42.2-laconic-0.1.4":
   version "0.42.2-laconic-0.1.4"
   resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Flibp2p/-/0.42.2-laconic-0.1.4/libp2p-0.42.2-laconic-0.1.4.tgz#ac9347e70d6d3cee040ad02074cae3070b91a8fb"
@@ -470,35 +352,6 @@
     lodash "^4.17.21"
     uint8arrays "^4.0.3"
 
-"@cerc-io/peer@^0.2.40":
-  version "0.2.40"
-  resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fpeer/-/0.2.40/peer-0.2.40.tgz#ba965079c2006195c92f5457e5976a8af54391c3"
-  integrity sha512-PFYNDqabyAZYdpOh5ZGLXR/v3jqSELLMHkU1lVFCUOGON8awOeXU/RJlMEt+v6BJjPo5Y7y60et4sUb7fo1MfA==
-  dependencies:
-    "@cerc-io/libp2p" "0.42.2-laconic-0.1.3"
-    "@cerc-io/prometheus-metrics" "1.1.4"
-    "@chainsafe/libp2p-noise" "^11.0.0"
-    "@libp2p/floodsub" "^6.0.0"
-    "@libp2p/mplex" "^7.1.1"
-    "@libp2p/peer-id-factory" "^2.0.0"
-    "@libp2p/pubsub-peer-discovery" "^8.0.0"
-    "@libp2p/websockets" "^5.0.5"
-    "@multiformats/multiaddr" "^11.1.4"
-    assert "^2.0.0"
-    buffer "^6.0.3"
-    chai "^4.3.4"
-    debug "^4.3.1"
-    dotenv "^16.0.3"
-    it-length-prefixed "^8.0.4"
-    it-map "^2.0.0"
-    it-pipe "^2.0.5"
-    it-pushable "^3.1.2"
-    mocha "^8.4.0"
-    p-event "^5.0.1"
-    uint8arrays "^4.0.3"
-    unique-names-generator "^4.7.1"
-    yargs "^17.0.1"
-
 "@cerc-io/peer@^0.2.65", "@cerc-io/peer@^0.2.74":
   version "0.2.74"
   resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fpeer/-/0.2.74/peer-0.2.74.tgz#cc54e513e1857b04630f6b11e9a65dcdcc532790"
@@ -554,13 +407,6 @@
     left-pad "^1.3.0"
     mocha "^8.4.0"
 
-"@cerc-io/solidity-mapper@^0.2.40":
-  version "0.2.40"
-  resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fsolidity-mapper/-/0.2.40/solidity-mapper-0.2.40.tgz#c4263f86cb3f1f2950118d348e3a9df39fcc861c"
-  integrity sha512-1gnBxlqaBSnHYlKzindV/lLc+UdJOjf2ytyYqxlT70w1444U39IQ18AWHlykMDCjgScczDTSNobFodQIdwwqNQ==
-  dependencies:
-    dotenv "^10.0.0"
-
 "@cerc-io/solidity-mapper@^0.2.74":
   version "0.2.74"
   resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fsolidity-mapper/-/0.2.74/solidity-mapper-0.2.74.tgz#770115a57481b94a3d21eb00b17cb4b47eb441ad"
@@ -573,43 +419,6 @@
   resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Fts-channel/-/1.0.3-ts-nitro-0.1.1/ts-channel-1.0.3-ts-nitro-0.1.1.tgz#0768781313a167295c0bf21307f47e02dc17e936"
   integrity sha512-2jFICUSyffuZ+8+qRhXuLSJq4GJ6Y02wxiXoubH0Kzv2lIKkJtWICY1ZQQhtXAvP0ncAQB85WJHqtqwH8l7J3Q==
 
-"@cerc-io/util@^0.2.40":
-  version "0.2.40"
-  resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Futil/-/0.2.40/util-0.2.40.tgz#5ad35b3c57dc3c0997141d3bb82ff2f86046fb9e"
-  integrity sha512-PeGYiEd7XEy3tj4YMAku0Jm8bNEeaTcntF0U8Cx1Vo9XntJls34lrwKiz+IU+Rt/sEwk0U0sQrKtgqZzjQ6Opg==
-  dependencies:
-    "@apollo/utils.keyvaluecache" "^1.0.1"
-    "@cerc-io/solidity-mapper" "^0.2.40"
-    "@ethersproject/providers" "^5.4.4"
-    "@graphql-tools/schema" "^9.0.10"
-    "@graphql-tools/utils" "^9.1.1"
-    "@ipld/dag-cbor" "^6.0.12"
-    apollo-server-core "^3.11.1"
-    apollo-server-express "^3.11.1"
-    apollo-server-plugin-response-cache "^3.8.1"
-    debug "^4.3.1"
-    decimal.js "^10.3.1"
-    ethers "^5.4.4"
-    express "^4.18.2"
-    express-queue "^0.0.13"
-    fs-extra "^10.0.0"
-    graphql "^15.5.0"
-    graphql-subscriptions "^2.0.0"
-    graphql-ws "^5.11.2"
-    ipfs-http-client "^56.0.3"
-    js-yaml "^4.1.0"
-    json-bigint "^1.0.0"
-    lodash "^4.17.21"
-    multiformats "^9.4.8"
-    pg "^8.5.1"
-    pg-boss "^6.1.0"
-    prom-client "^14.0.1"
-    toml "^3.0.0"
-    typeorm "^0.2.32"
-    typeorm-naming-strategies "^2.0.0"
-    ws "^8.11.0"
-    yargs "^17.0.1"
-
 "@cerc-io/util@^0.2.74":
   version "0.2.74"
   resolved "https://git.vdb.to/api/packages/cerc-io/npm/%40cerc-io%2Futil/-/0.2.74/util-0.2.74.tgz#3f07fa529df9c2633e0b6b42e3d44779c8f05ae6"
@@ -4820,11 +4629,6 @@ dotenv@^10.0.0, dotenv@~10.0.0:
   resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-10.0.0.tgz#3d4227b8fb95f81096cdd2b66653fb2c7085ba81"
   integrity sha512-rlBi9d8jpv9Sf1klPjNfFAuWDjKLwTIJJ/VxtoTwIR6hnZxcEOQCZg2oIL3MWBYw5GpUDKOEnND7LXTbIpQ03Q==
 
-dotenv@^16.0.3:
-  version "16.0.3"
-  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-16.0.3.tgz#115aec42bac5053db3c456db30cc243a5a836a07"
-  integrity sha512-7GO6HghkA5fYG9TYnNxi14/7K9f5occMlp3zXAuSxn7CKCxt9xbNWG7yF8hTCSUchlfWSe3uLmlPfigevRItzQ==
-
 dotenv@^8.2.0:
   version "8.6.0"
   resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-8.6.0.tgz#061af664d19f7f4d8fc6e4ff9b584ce237adcb8b"
@@ -10642,29 +10446,6 @@ typeorm@0.2.37:
     yargs "^17.0.1"
     zen-observable-ts "^1.0.0"
 
-typeorm@^0.2.32:
-  version "0.2.45"
-  resolved "https://registry.yarnpkg.com/typeorm/-/typeorm-0.2.45.tgz#e5bbb3af822dc4646bad96cfa48cd22fa4687cea"
-  integrity sha512-c0rCO8VMJ3ER7JQ73xfk0zDnVv0WDjpsP6Q1m6CVKul7DB9iVdWLRjPzc8v2eaeBuomsbZ2+gTaYr8k1gm3bYA==
-  dependencies:
-    "@sqltools/formatter" "^1.2.2"
-    app-root-path "^3.0.0"
-    buffer "^6.0.3"
-    chalk "^4.1.0"
-    cli-highlight "^2.1.11"
-    debug "^4.3.1"
-    dotenv "^8.2.0"
-    glob "^7.1.6"
-    js-yaml "^4.0.0"
-    mkdirp "^1.0.4"
-    reflect-metadata "^0.1.13"
-    sha.js "^2.4.11"
-    tslib "^2.1.0"
-    uuid "^8.3.2"
-    xml2js "^0.4.23"
-    yargs "^17.0.1"
-    zen-observable-ts "^1.0.0"
-
 "typescript@^3 || ^4", typescript@^4.9.4:
   version "4.9.5"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.5.tgz#095979f9bcc0d09da324d58d03ce8f8374cbe65a"