diff --git a/packages/core/src/contract/deploy-contract.ts b/packages/core/src/contract/deploy-contract.ts
index 30534f7..752f149 100644
--- a/packages/core/src/contract/deploy-contract.ts
+++ b/packages/core/src/contract/deploy-contract.ts
@@ -68,6 +68,6 @@ export async function deployContract <CONTRACT extends CompiledContract>(
   } catch (error) {
     console.error('err', error);
     // TODO: add more error handlers for different scenarios
-    return returnError('UserRejectedTransactionError');
+    return returnError('UserRejectedTransactionError', error as Error);
   }
 }
diff --git a/packages/core/src/contract/read-contract.ts b/packages/core/src/contract/read-contract.ts
index 6284240..9fec28d 100644
--- a/packages/core/src/contract/read-contract.ts
+++ b/packages/core/src/contract/read-contract.ts
@@ -41,9 +41,9 @@ export async function readContract<CONTRACT extends CompiledContract, GETTER ext
   // TODO: handle the read with more details
   if (res.error) {
     if (res.response.status === 429) {
-      return returnError('TonRateLimitError');
+      return returnError('TonRateLimitError', res.error);
     }
-    return returnError('TonReadError');
+    return returnError('TonReadError', res.error);
   }
 
   try {
@@ -51,6 +51,6 @@ export async function readContract<CONTRACT extends CompiledContract, GETTER ext
       parseReadReturn(fullContract.abi, options.getter, res.data) as ContractGetterReturn<CONTRACT, GETTER>
     );
   } catch (error) {
-    return returnError('TonReadError');
+    return returnError('TonReadError', error);
   }
 }
diff --git a/packages/core/src/contract/write-contract.ts b/packages/core/src/contract/write-contract.ts
index cf48c0b..e919257 100644
--- a/packages/core/src/contract/write-contract.ts
+++ b/packages/core/src/contract/write-contract.ts
@@ -53,7 +53,7 @@ export async function writeContract <CONTRACT extends CompiledContract, METHOD e
     return returnData(bocToHash(res.boc));
   } catch (error) {
     // TODO: add more error handlers for different scenarios
-    return returnError('UserRejectedTransactionError');
+    return returnError('UserRejectedTransactionError', error);
   }
 }
 
diff --git a/packages/core/src/shared/errors/errors.ts b/packages/core/src/shared/errors/errors.ts
index eb9cb07..e1c493c 100644
--- a/packages/core/src/shared/errors/errors.ts
+++ b/packages/core/src/shared/errors/errors.ts
@@ -41,6 +41,8 @@ export type SupportedErrors = {
   TonRateLimitError: TonRateLimitError,
 };
 
+export type SupportedErrorsKeys = keyof typeof supportedErrors;
+
 export const supportedErrors = {
   // Syntax errors
   ConnectFunctionUnavailableError: ConnectFunctionUnavailableError,
@@ -60,4 +62,4 @@ export const supportedErrors = {
   TonWalletDisconnectError: TonWalletDisconnectError,
   TonReadError: TonReadError,
   TonRateLimitError: TonRateLimitError,
-}
+} as const;
diff --git a/packages/core/src/shared/errors/return-error.ts b/packages/core/src/shared/errors/return-error.ts
index 2ca1975..6c900f9 100644
--- a/packages/core/src/shared/errors/return-error.ts
+++ b/packages/core/src/shared/errors/return-error.ts
@@ -1,13 +1,28 @@
 import type { DataOrError } from './types.js';
-import { SupportedErrors, supportedErrors } from './errors.js';
+import {
+  SupportedErrors,
+  supportedErrors,
+  SupportedErrorsKeys,
+} from './errors.js';
 
 /**
  * A helper function to return a typed error in a form of `DataOrError`.
  */
-export const returnError = <TYPE extends keyof typeof supportedErrors>(
+export const returnError = <TYPE extends SupportedErrorsKeys>(
   type: TYPE,
+  cause?: unknown
 ): DataOrError<any, SupportedErrors[TYPE]> => {
-  const error = new supportedErrors[type]();
+  const nativeTonErrors: SupportedErrorsKeys[] = ['TonConnectError', 'TonConnectUIError'] as const;
+
+  const errorClass = supportedErrors[type]
+
+  if (nativeTonErrors.includes(type)) {
+    const error = new errorClass();
+
+    return { data: undefined, error: error as SupportedErrors[TYPE] };
+  }
+
+  const error = new errorClass(cause as any);
 
   return { data: undefined, error: error as SupportedErrors[TYPE] };
 };
diff --git a/packages/core/src/shared/errors/syntax-errors.ts b/packages/core/src/shared/errors/syntax-errors.ts
index cee98bb..7567d20 100644
--- a/packages/core/src/shared/errors/syntax-errors.ts
+++ b/packages/core/src/shared/errors/syntax-errors.ts
@@ -6,44 +6,50 @@ export class SyntaxError extends Error {
 }
 
 export class ConnectFunctionUnavailableError extends SyntaxError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('This function is not available for UI-based wallet connections. Use `createWalletClientUI` instead');
     this.name = 'ConnectFunctionUnavailableError';
+    this.cause = cause;
   }
 }
 
 export class ConnectUIFunctionUnavailableError extends SyntaxError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('This function is only available for UI-based wallet connections');
     this.name = 'ConnectUIFunctionUnavailableError';
+    this.cause = cause;
   }
 }
 
 
 export class ConnectUIFunctionUnavailableInNodeError extends SyntaxError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('This function is not available in the server environment. Please you `createWalletClient` instead or, if you use Next.js, call `createWalletClientUI` in `useEffect` hook or in the event handler, so it creates a wallet client when the `window` is available.');
     this.name = 'ConnectUIFunctionUnavailableInNodeError';
+    this.cause = cause;
   }
 }
 
 export class ReconnectFunctionUnavailableError extends SyntaxError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('The reconnect is not available for UI-based wallet connections. Pass `restoreConnection: true` to the `createWalletClientUI` function to enable it');
     this.name = 'ReconnectFunctionUnavailableError';
+    this.cause = cause;
   }
 }
 
 export class IncorrectContractError extends SyntaxError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('The contract is incorrect. Provide the contract class compiled from your Tact or Func files');
     this.name = 'IncorrectContractError';
+    this.cause = cause;
   }
 }
 
 export class MissingContractAddressError extends SyntaxError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('The contract address is not provided to the walletClient. Call `setAddress` first');
     this.name = 'MissingContractAddressError';
+    this.cause = cause;
   }
 }
diff --git a/packages/core/src/shared/errors/ton-errors.ts b/packages/core/src/shared/errors/ton-errors.ts
index 746f025..c180d98 100644
--- a/packages/core/src/shared/errors/ton-errors.ts
+++ b/packages/core/src/shared/errors/ton-errors.ts
@@ -16,30 +16,34 @@ export class TonError extends Error {
 }
 
 export class TonWalletConnectionError extends TonError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('Wallet connection failed');
     this.name = 'TonWalletConnectionError';
+    this.cause = cause;
   }
 }
 
 export class TonWalletDisconnectError extends TonError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('Could not disconnect from the wallet');
     this.name = 'TonWalletDisconnectError';
+    this.cause = cause;
   }
 }
 
 export class TonReadError extends TonError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('Cannot process the read request. Either the request returned a non-zero exit code or the data could not be parsed');
     this.name = 'TonReadError';
+    this.cause = cause;
   }
 }
 
 export class TonRateLimitError extends TonError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('Rate limit is exceeded. Provide the `authKey` to the public client with a better Ton Center plan to get more requests per second');
     this.name = 'TonRateLimitError';
+    this.cause = cause;
   }
 }
 
diff --git a/packages/core/src/shared/errors/user-errors.ts b/packages/core/src/shared/errors/user-errors.ts
index 7f0fe29..f07299a 100644
--- a/packages/core/src/shared/errors/user-errors.ts
+++ b/packages/core/src/shared/errors/user-errors.ts
@@ -6,22 +6,25 @@ export class UserError extends Error {
 }
 
 export class UserUnauthorizedError extends UserError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('Not authorized. Please, connect the wallet first');
     this.name = 'UserUnauthorizedError';
+    this.cause = cause;
   }
 }
 
 export class UserRejectedConnectionError extends UserError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('User rejected the connection to their wallet');
     this.name = 'UserRejectedConnectionError';
+    this.cause = cause;
   }
 }
 
 export class UserRejectedTransactionError extends UserError {
-  constructor() {
+  constructor(cause?: unknown) {
     super('User rejected the transaction request from their wallet');
     this.name = 'UserRejectedTransactionError';
+    this.cause = cause;
   }
 }
diff --git a/packages/core/src/wallet/send-transaction.ts b/packages/core/src/wallet/send-transaction.ts
index a483330..e4e5e6b 100644
--- a/packages/core/src/wallet/send-transaction.ts
+++ b/packages/core/src/wallet/send-transaction.ts
@@ -32,6 +32,6 @@ export async function sendTransaction (
     const hash = bocToHash(res.boc);
     return returnData(hash);
   }  catch (error) {
-    return returnError('UserRejectedTransactionError');
+    return returnError('UserRejectedTransactionError', error);
   }
 }