diff --git a/packages/web3-core/src/web3_batch_request.ts b/packages/web3-core/src/web3_batch_request.ts
index 5529895df05..0fa7c959cf8 100644
--- a/packages/web3-core/src/web3_batch_request.ts
+++ b/packages/web3-core/src/web3_batch_request.ts
@@ -15,21 +15,21 @@ You should have received a copy of the GNU Lesser General Public License
 along with web3.js.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-import { JsonRpcBatchResponse, JsonRpcOptionalRequest, JsonRpcRequest } from 'web3-types';
+import { JsonRpcBatchResponse, JsonRpcOptionalRequest, JsonRpcRequest, Web3APISpec } from 'web3-types';
 import { jsonRpc, Web3DeferredPromise } from 'web3-utils';
 import { OperationAbortError, OperationTimeoutError, ResponseError } from 'web3-errors';
 import { Web3RequestManager } from './web3_request_manager';
 
 export const DEFAULT_BATCH_REQUEST_TIMEOUT = 1000;
 
-export class Web3BatchRequest {
-	private readonly _requestManager: Web3RequestManager;
+export class Web3BatchRequest<API extends Web3APISpec>  {
+	private readonly _requestManager: Web3RequestManager<API>;
 	private readonly _requests: Map<
 		number,
 		{ payload: JsonRpcRequest; promise: Web3DeferredPromise<unknown> }
 	>;
 
-	public constructor(requestManager: Web3RequestManager) {
+	public constructor(requestManager: Web3RequestManager<API>) {
 		this._requestManager = requestManager;
 		this._requests = new Map();
 	}
diff --git a/packages/web3-core/src/web3_context.ts b/packages/web3-core/src/web3_context.ts
index af138c199cd..ac5c337aac2 100644
--- a/packages/web3-core/src/web3_context.ts
+++ b/packages/web3-core/src/web3_context.ts
@@ -273,10 +273,10 @@ export class Web3Context<
 		return true;
 	}
 
-	public get BatchRequest(): new () => Web3BatchRequest {
+	public get BatchRequest(): new () => Web3BatchRequest<API> {
 		return Web3BatchRequest.bind(
 			undefined,
-			this._requestManager as unknown as Web3RequestManager,
+			this._requestManager as unknown as Web3RequestManager<API>,
 		);
 	}
 }
diff --git a/packages/web3-core/src/web3_request_manager.ts b/packages/web3-core/src/web3_request_manager.ts
index eb448c85ebd..5212547f47e 100644
--- a/packages/web3-core/src/web3_request_manager.ts
+++ b/packages/web3-core/src/web3_request_manager.ts
@@ -26,7 +26,6 @@ import HttpProvider from 'web3-providers-http';
 import IpcProvider from 'web3-providers-ipc';
 import WSProvider from 'web3-providers-ws';
 import {
-	EthExecutionAPI,
 	JsonRpcBatchRequest,
 	JsonRpcBatchResponse,
 	JsonRpcPayload,
@@ -63,7 +62,7 @@ const availableProviders = {
 };
 
 export class Web3RequestManager<
-	API extends Web3APISpec = EthExecutionAPI,
+	API extends Web3APISpec,
 > extends Web3EventEmitter<{
 	[key in Web3RequestManagerEvent]: SupportedProviders<API> | undefined;
 }> {
diff --git a/packages/web3-core/src/web3_subscriptions.ts b/packages/web3-core/src/web3_subscriptions.ts
index ef4293ebd82..877e509fa5f 100644
--- a/packages/web3-core/src/web3_subscriptions.ts
+++ b/packages/web3-core/src/web3_subscriptions.ts
@@ -23,10 +23,10 @@ import {
 	Web3BaseProvider,
 	Web3APISpec,
 	Web3APIParams,
-	EthExecutionAPI,
 	Log,
 	JsonRpcNotification,
 	JsonRpcSubscriptionResult,
+	Web3APIMethod,
 } from 'web3-types';
 import { jsonRpc } from 'web3-utils';
 import { Web3EventEmitter, Web3EventMap } from './web3_event_emitter';
@@ -34,10 +34,11 @@ import { Web3EventEmitter, Web3EventMap } from './web3_event_emitter';
 import { Web3RequestManager } from './web3_request_manager';
 
 export abstract class Web3Subscription<
+	API extends Web3APISpec,
 	EventMap extends Web3EventMap,
 	// eslint-disable-next-line @typescript-eslint/no-explicit-any
 	ArgsType = any,
-	API extends Web3APISpec = EthExecutionAPI,
+	Method extends Web3APIMethod<API> = any
 > extends Web3EventEmitter<EventMap> {
 	private readonly _requestManager: Web3RequestManager<API>;
 	private readonly _lastBlock?: BlockOutput;
@@ -65,7 +66,7 @@ export abstract class Web3Subscription<
 
 	public async subscribe() {
 		this._id = await this._requestManager.send({
-			method: 'eth_subscribe',
+			method: this._buildSubscriptionMethod(),
 			params: this._buildSubscriptionParams(),
 		});
 
@@ -121,7 +122,13 @@ export abstract class Web3Subscription<
 	}
 
 	// eslint-disable-next-line class-methods-use-this
-	protected _buildSubscriptionParams(): Web3APIParams<API, 'eth_subscribe'> {
+	protected _buildSubscriptionMethod(): Method {
+		// This should be overridden in the subclass
+		throw new Error('Implement in the child class');
+	}
+
+	// eslint-disable-next-line class-methods-use-this
+	protected _buildSubscriptionParams(): Web3APIParams<API, Method> {
 		// This should be overridden in the subclass
 		throw new Error('Implement in the child class');
 	}
@@ -130,7 +137,7 @@ export abstract class Web3Subscription<
 export type Web3SubscriptionConstructor<
 	API extends Web3APISpec,
 	// eslint-disable-next-line @typescript-eslint/no-explicit-any
-	SubscriptionType extends Web3Subscription<any, any, API> = Web3Subscription<any, any, API>,
+	SubscriptionType extends Web3Subscription<API, any, any> = Web3Subscription<API, any, any>,
 > = new (
 	// We accept any type of arguments here and don't deal with this type internally
 	// eslint-disable-next-line @typescript-eslint/no-explicit-any
diff --git a/packages/web3-eth-contract/src/contract.ts b/packages/web3-eth-contract/src/contract.ts
index ce40a04c162..205d698f6d7 100644
--- a/packages/web3-eth-contract/src/contract.ts
+++ b/packages/web3-eth-contract/src/contract.ts
@@ -15,7 +15,7 @@ You should have received a copy of the GNU Lesser General Public License
 along with web3.js.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-import { Web3Context, Web3EventEmitter, Web3PromiEvent } from 'web3-core';
+import { Web3Context, Web3EventEmitter, Web3PromiEvent, Web3SubscriptionConstructor } from 'web3-core';
 import { ContractExecutionError, SubscriptionError, Web3ContractError } from 'web3-errors';
 import {
 	call,
@@ -49,12 +49,12 @@ import {
 	BlockNumberOrTag,
 	BlockTags,
 	Bytes,
-	EthExecutionAPI,
 	Filter,
 	HexString,
 	LogsInput,
 	Mutable,
 	Common,
+	Web3APISpec,
 } from 'web3-types';
 import {
 	DataFormat,
@@ -154,12 +154,23 @@ const contractSubscriptions = {
 	newHeads: NewHeadsSubscription,
 	newBlockHeaders: NewHeadsSubscription,
 };
+type ContractSubscriptions = {
+	logs: typeof LogsSubscription,
+	newHeads: typeof NewHeadsSubscription,
+	newBlockHeaders: typeof NewHeadsSubscription,
+};
 
 /**
  * The class designed to interact with smart contracts on the Ethereum blockchain.
  */
-export class Contract<Abi extends ContractAbi>
-	extends Web3Context<EthExecutionAPI, typeof contractSubscriptions>
+export class Contract<
+	API extends Web3APISpec,
+	Abi extends ContractAbi,
+	RegisteredSubs extends {
+		[key: string]: Web3SubscriptionConstructor<API>;
+	} = ContractSubscriptions
+>
+	extends Web3Context<API, RegisteredSubs>
 	implements Web3EventEmitter<ContractEventEmitterInterface<Abi>>
 {
 	/**
diff --git a/packages/web3-eth-contract/src/log_subscription.ts b/packages/web3-eth-contract/src/log_subscription.ts
index faa5b3fc224..6ed9eba7e92 100644
--- a/packages/web3-eth-contract/src/log_subscription.ts
+++ b/packages/web3-eth-contract/src/log_subscription.ts
@@ -15,7 +15,7 @@ You should have received a copy of the GNU Lesser General Public License
 along with web3.js.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-import { LogsInput, HexString, Topic } from 'web3-types';
+import { LogsInput, HexString, Topic, Web3APISpec } from 'web3-types';
 import { Web3RequestManager, Web3Subscription } from 'web3-core';
 import { AbiEventFragment } from 'web3-eth-abi';
 // eslint-disable-next-line import/no-cycle
@@ -79,7 +79,8 @@ import { ContractAbiWithSignature, EventLog } from './types';
  * }
  * ```
  */
-export class LogsSubscription extends Web3Subscription<
+export class LogsSubscription<API extends Web3APISpec> extends Web3Subscription<
+	API,
 	{
 		error: Error;
 		connected: number;
@@ -113,7 +114,7 @@ export class LogsSubscription extends Web3Subscription<
 			jsonInterface: ContractAbiWithSignature;
 		},
 		options: {
-			requestManager: Web3RequestManager;
+			requestManager: Web3RequestManager<API>;
 			returnFormat?: DataFormat;
 		},
 	) {
@@ -125,6 +126,8 @@ export class LogsSubscription extends Web3Subscription<
 		this.jsonInterface = args.jsonInterface;
 	}
 
+	// TODO
+	// @ts-ignore
 	protected _buildSubscriptionParams() {
 		return ['logs', { address: this.address, topics: this.topics }] as [
 			'logs',
diff --git a/packages/web3-eth/src/web3_subscriptions.ts b/packages/web3-eth/src/web3_subscriptions.ts
index 1a9771ba652..00e4f634715 100644
--- a/packages/web3-eth/src/web3_subscriptions.ts
+++ b/packages/web3-eth/src/web3_subscriptions.ts
@@ -25,6 +25,9 @@ import {
 	Topic,
 	BlockHeaderOutput,
 	LogsOutput,
+	EthExecutionAPI,
+	Web3APIMethod,
+	Web3APIParams,
 } from 'web3-types';
 import { Web3Subscription } from 'web3-core';
 import { blockHeaderSchema, logSchema, syncSchema } from './schemas';
@@ -34,7 +37,8 @@ type CommonSubscriptionEvents = {
 	connected: number;
 };
 
-export class LogsSubscription extends Web3Subscription<
+export class LogsSubscription<Method extends Web3APIMethod<EthExecutionAPI> = 'eth_subscribe'> extends Web3Subscription<
+	EthExecutionAPI,
 	CommonSubscriptionEvents & {
 		data: LogsOutput;
 	},
@@ -42,11 +46,16 @@ export class LogsSubscription extends Web3Subscription<
 		readonly fromBlock?: BlockNumberOrTag;
 		readonly address?: Address | Address[];
 		readonly topics?: Topic[];
-	}
+	},
+	Method
 > {
+	protected _buildSubscriptionMethod() {
+		return 'eth_subscribe' as Method
+	}
+
 	protected _buildSubscriptionParams() {
 		// eslint-disable-next-line @typescript-eslint/no-explicit-any
-		return ['logs', this.args] as ['logs', any];
+		return ['logs', this.args] as Web3APIParams<EthExecutionAPI, Method>
 	}
 
 	public _processSubscriptionResult(data: LogsOutput) {
@@ -59,6 +68,7 @@ export class LogsSubscription extends Web3Subscription<
 }
 
 export class NewPendingTransactionsSubscription extends Web3Subscription<
+	EthExecutionAPI,
 	CommonSubscriptionEvents & {
 		data: HexString;
 	}
@@ -78,6 +88,7 @@ export class NewPendingTransactionsSubscription extends Web3Subscription<
 }
 
 export class NewHeadsSubscription extends Web3Subscription<
+	EthExecutionAPI,
 	CommonSubscriptionEvents & {
 		data: BlockHeaderOutput;
 	}
@@ -97,6 +108,7 @@ export class NewHeadsSubscription extends Web3Subscription<
 }
 
 export class SyncingSubscription extends Web3Subscription<
+	EthExecutionAPI,
 	CommonSubscriptionEvents & {
 		data: SyncOutput;
 		changed: boolean;
diff --git a/packages/web3-plugin-example/src/index.ts b/packages/web3-plugin-example/src/index.ts
index db1545365bd..8a12b1dd00a 100644
--- a/packages/web3-plugin-example/src/index.ts
+++ b/packages/web3-plugin-example/src/index.ts
@@ -41,7 +41,7 @@ declare module 'web3' {
 	}
 }
 
-export class ChainlinkPlugin extends Web3PluginBase<Web3APISpec> {
+export class ChainlinkPlugin extends Web3PluginBase<ChainlinkPluginAPI> {
 	public pluginNamespace = 'chainlink';
 
 	protected readonly _contract: Contract<typeof AggregatorV3InterfaceABI>;
diff --git a/packages/web3-rpc-methods/src/eth_rpc_methods.ts b/packages/web3-rpc-methods/src/eth_rpc_methods.ts
index 57811421f2f..c25160df299 100644
--- a/packages/web3-rpc-methods/src/eth_rpc_methods.ts
+++ b/packages/web3-rpc-methods/src/eth_rpc_methods.ts
@@ -30,56 +30,56 @@ import {
 } from 'web3-types';
 import { validator } from 'web3-validator';
 
-export async function getProtocolVersion(requestManager: Web3RequestManager) {
+export async function getProtocolVersion(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_protocolVersion',
 		params: [],
 	});
 }
 
-export async function getSyncing(requestManager: Web3RequestManager) {
+export async function getSyncing(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_syncing',
 		params: [],
 	});
 }
 
-export async function getCoinbase(requestManager: Web3RequestManager) {
+export async function getCoinbase(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_coinbase',
 		params: [],
 	});
 }
 
-export async function getMining(requestManager: Web3RequestManager) {
+export async function getMining(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_mining',
 		params: [],
 	});
 }
 
-export async function getHashRate(requestManager: Web3RequestManager) {
+export async function getHashRate(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_hashrate',
 		params: [],
 	});
 }
 
-export async function getGasPrice(requestManager: Web3RequestManager) {
+export async function getGasPrice(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_gasPrice',
 		params: [],
 	});
 }
 
-export async function getAccounts(requestManager: Web3RequestManager) {
+export async function getAccounts(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_accounts',
 		params: [],
 	});
 }
 
-export async function getBlockNumber(requestManager: Web3RequestManager) {
+export async function getBlockNumber(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_blockNumber',
 		params: [],
@@ -87,7 +87,7 @@ export async function getBlockNumber(requestManager: Web3RequestManager) {
 }
 
 export async function getBalance(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	address: Address,
 	blockNumber: BlockNumberOrTag,
 ) {
@@ -100,7 +100,7 @@ export async function getBalance(
 }
 
 export async function getStorageAt(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	address: Address,
 	storageSlot: Uint256,
 	blockNumber: BlockNumberOrTag,
@@ -114,7 +114,7 @@ export async function getStorageAt(
 }
 
 export async function getTransactionCount(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	address: Address,
 	blockNumber: BlockNumberOrTag,
 ) {
@@ -127,7 +127,7 @@ export async function getTransactionCount(
 }
 
 export async function getBlockTransactionCountByHash(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockHash: HexString32Bytes,
 ) {
 	validator.validate(['bytes32'], [blockHash]);
@@ -139,7 +139,7 @@ export async function getBlockTransactionCountByHash(
 }
 
 export async function getBlockTransactionCountByNumber(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockNumber: BlockNumberOrTag,
 ) {
 	validator.validate(['blockNumberOrTag'], [blockNumber]);
@@ -151,7 +151,7 @@ export async function getBlockTransactionCountByNumber(
 }
 
 export async function getUncleCountByBlockHash(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockHash: HexString32Bytes,
 ) {
 	validator.validate(['bytes32'], [blockHash]);
@@ -163,7 +163,7 @@ export async function getUncleCountByBlockHash(
 }
 
 export async function getUncleCountByBlockNumber(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockNumber: BlockNumberOrTag,
 ) {
 	validator.validate(['blockNumberOrTag'], [blockNumber]);
@@ -175,7 +175,7 @@ export async function getUncleCountByBlockNumber(
 }
 
 export async function getCode(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	address: Address,
 	blockNumber: BlockNumberOrTag,
 ) {
@@ -188,7 +188,7 @@ export async function getCode(
 }
 
 export async function sign(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	address: Address,
 	message: HexStringBytes,
 ) {
@@ -205,7 +205,7 @@ export async function sign(
 // ? validateTransactionWithSender(transaction)
 // : validateTransactionWithSender(transaction, true) with true being a isPartial flag
 export async function signTransaction(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	transaction: TransactionWithSenderAPI | Partial<TransactionWithSenderAPI>,
 ) {
 	return requestManager.send({
@@ -219,7 +219,7 @@ export async function signTransaction(
 // ? validateTransactionWithSender(transaction)
 // : validateTransactionWithSender(transaction, true) with true being a isPartial flag
 export async function sendTransaction(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	transaction: TransactionWithSenderAPI | Partial<TransactionWithSenderAPI>,
 ) {
 	return requestManager.send({
@@ -229,7 +229,7 @@ export async function sendTransaction(
 }
 
 export async function sendRawTransaction(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	transaction: HexStringBytes,
 ) {
 	validator.validate(['hex'], [transaction]);
@@ -242,7 +242,7 @@ export async function sendRawTransaction(
 
 // TODO - validate transaction
 export async function call(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	transaction: TransactionCallAPI,
 	blockNumber: BlockNumberOrTag,
 ) {
@@ -257,7 +257,7 @@ export async function call(
 
 // TODO Not sure how to best validate Partial<TransactionWithSender>
 export async function estimateGas(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	transaction: Partial<TransactionWithSenderAPI>,
 	blockNumber: BlockNumberOrTag,
 ) {
@@ -270,7 +270,7 @@ export async function estimateGas(
 }
 
 export async function getBlockByHash(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockHash: HexString32Bytes,
 	hydrated: boolean,
 ) {
@@ -283,7 +283,7 @@ export async function getBlockByHash(
 }
 
 export async function getBlockByNumber(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockNumber: BlockNumberOrTag,
 	hydrated: boolean,
 ) {
@@ -296,7 +296,7 @@ export async function getBlockByNumber(
 }
 
 export async function getTransactionByHash(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	transactionHash: HexString32Bytes,
 ) {
 	validator.validate(['bytes32'], [transactionHash]);
@@ -308,7 +308,7 @@ export async function getTransactionByHash(
 }
 
 export async function getTransactionByBlockHashAndIndex(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockHash: HexString32Bytes,
 	transactionIndex: Uint,
 ) {
@@ -321,7 +321,7 @@ export async function getTransactionByBlockHashAndIndex(
 }
 
 export async function getTransactionByBlockNumberAndIndex(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockNumber: BlockNumberOrTag,
 	transactionIndex: Uint,
 ) {
@@ -334,7 +334,7 @@ export async function getTransactionByBlockNumberAndIndex(
 }
 
 export async function getTransactionReceipt(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	transactionHash: HexString32Bytes,
 ) {
 	validator.validate(['bytes32'], [transactionHash]);
@@ -346,7 +346,7 @@ export async function getTransactionReceipt(
 }
 
 export async function getUncleByBlockHashAndIndex(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockHash: HexString32Bytes,
 	uncleIndex: Uint,
 ) {
@@ -359,7 +359,7 @@ export async function getUncleByBlockHashAndIndex(
 }
 
 export async function getUncleByBlockNumberAndIndex(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockNumber: BlockNumberOrTag,
 	uncleIndex: Uint,
 ) {
@@ -371,14 +371,14 @@ export async function getUncleByBlockNumberAndIndex(
 	});
 }
 
-export async function getCompilers(requestManager: Web3RequestManager) {
+export async function getCompilers(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_getCompilers',
 		params: [],
 	});
 }
 
-export async function compileSolidity(requestManager: Web3RequestManager, code: string) {
+export async function compileSolidity(requestManager: Web3RequestManager<Web3EthExecutionAPI>, code: string) {
 	validator.validate(['string'], [code]);
 
 	return requestManager.send({
@@ -387,7 +387,7 @@ export async function compileSolidity(requestManager: Web3RequestManager, code:
 	});
 }
 
-export async function compileLLL(requestManager: Web3RequestManager, code: string) {
+export async function compileLLL(requestManager: Web3RequestManager<Web3EthExecutionAPI>, code: string) {
 	validator.validate(['string'], [code]);
 
 	return requestManager.send({
@@ -396,7 +396,7 @@ export async function compileLLL(requestManager: Web3RequestManager, code: strin
 	});
 }
 
-export async function compileSerpent(requestManager: Web3RequestManager, code: string) {
+export async function compileSerpent(requestManager: Web3RequestManager<Web3EthExecutionAPI>, code: string) {
 	validator.validate(['string'], [code]);
 
 	return requestManager.send({
@@ -405,7 +405,7 @@ export async function compileSerpent(requestManager: Web3RequestManager, code: s
 	});
 }
 
-export async function newFilter(requestManager: Web3RequestManager, filter: Filter) {
+export async function newFilter(requestManager: Web3RequestManager<Web3EthExecutionAPI>, filter: Filter) {
 	validator.validate(['filter'], [filter]);
 
 	return requestManager.send({
@@ -414,21 +414,21 @@ export async function newFilter(requestManager: Web3RequestManager, filter: Filt
 	});
 }
 
-export async function newBlockFilter(requestManager: Web3RequestManager) {
+export async function newBlockFilter(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_newBlockFilter',
 		params: [],
 	});
 }
 
-export async function newPendingTransactionFilter(requestManager: Web3RequestManager) {
+export async function newPendingTransactionFilter(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_newPendingTransactionFilter',
 		params: [],
 	});
 }
 
-export async function uninstallFilter(requestManager: Web3RequestManager, filterIdentifier: Uint) {
+export async function uninstallFilter(requestManager: Web3RequestManager<Web3EthExecutionAPI>, filterIdentifier: Uint) {
 	validator.validate(['hex'], [filterIdentifier]);
 
 	return requestManager.send({
@@ -437,7 +437,7 @@ export async function uninstallFilter(requestManager: Web3RequestManager, filter
 	});
 }
 
-export async function getFilterChanges(requestManager: Web3RequestManager, filterIdentifier: Uint) {
+export async function getFilterChanges(requestManager: Web3RequestManager<Web3EthExecutionAPI>, filterIdentifier: Uint) {
 	validator.validate(['hex'], [filterIdentifier]);
 
 	return requestManager.send({
@@ -446,7 +446,7 @@ export async function getFilterChanges(requestManager: Web3RequestManager, filte
 	});
 }
 
-export async function getFilterLogs(requestManager: Web3RequestManager, filterIdentifier: Uint) {
+export async function getFilterLogs(requestManager: Web3RequestManager<Web3EthExecutionAPI>, filterIdentifier: Uint) {
 	validator.validate(['hex'], [filterIdentifier]);
 
 	return requestManager.send({
@@ -455,7 +455,7 @@ export async function getFilterLogs(requestManager: Web3RequestManager, filterId
 	});
 }
 
-export async function getLogs(requestManager: Web3RequestManager, filter: Filter) {
+export async function getLogs(requestManager: Web3RequestManager<Web3EthExecutionAPI>, filter: Filter) {
 	validator.validate(['filter'], [filter]);
 
 	return requestManager.send({
@@ -464,7 +464,7 @@ export async function getLogs(requestManager: Web3RequestManager, filter: Filter
 	});
 }
 
-export async function getWork(requestManager: Web3RequestManager) {
+export async function getWork(requestManager: Web3RequestManager<Web3EthExecutionAPI>) {
 	return requestManager.send({
 		method: 'eth_getWork',
 		params: [],
@@ -472,7 +472,7 @@ export async function getWork(requestManager: Web3RequestManager) {
 }
 
 export async function submitWork(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	nonce: HexString8Bytes,
 	hash: HexString32Bytes,
 	digest: HexString32Bytes,
@@ -486,7 +486,7 @@ export async function submitWork(
 }
 
 export async function submitHashrate(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	hashRate: HexString32Bytes,
 	id: HexString32Bytes,
 ) {
@@ -499,7 +499,7 @@ export async function submitHashrate(
 }
 
 export async function getFeeHistory(
-	requestManager: Web3RequestManager,
+	requestManager: Web3RequestManager<Web3EthExecutionAPI>,
 	blockCount: Uint,
 	newestBlock: BlockNumberOrTag,
 	rewardPercentiles: number[],