diff --git a/packages/sdk-provider-ethereum/src/EthereumStepExecutor.ts b/packages/sdk-provider-ethereum/src/EthereumStepExecutor.ts
index 39e6b36c..fc5ea1c3 100644
--- a/packages/sdk-provider-ethereum/src/EthereumStepExecutor.ts
+++ b/packages/sdk-provider-ethereum/src/EthereumStepExecutor.ts
@@ -4,7 +4,6 @@ import {
   type ExtendedChain,
   getRelayerQuote,
   getStepTransaction,
-  isTokenMessageSigningAllowed,
   LiFiErrorCode,
   type LiFiStep,
   type LiFiStepExtended,
@@ -227,6 +226,7 @@ export class EthereumStepExecutor extends BaseStepExecutor {
 
   private prepareUpdatedStep = async (
     client: SDKClient,
+    viemClient: Client,
     step: LiFiStepExtended,
     signedTypedData?: SignedTypedData[]
   ) => {
@@ -285,6 +285,7 @@ export class EthereumStepExecutor extends BaseStepExecutor {
     let transactionRequest: TransactionParameters | undefined
     if (step.transactionRequest) {
       transactionRequest = {
+        chainId: step.transactionRequest.chainId,
         to: step.transactionRequest.to,
         from: step.transactionRequest.from,
         data: step.transactionRequest.data,
@@ -301,8 +302,8 @@ export class EthereumStepExecutor extends BaseStepExecutor {
         //   ? BigInt(step.transactionRequest.maxFeePerGas as string)
         //   : undefined,
         maxPriorityFeePerGas:
-          this.client.account?.type === 'local'
-            ? await getMaxPriorityFeePerGas(client, this.client)
+          viemClient.account?.type === 'local'
+            ? await getMaxPriorityFeePerGas(client, viemClient)
             : step.transactionRequest.maxPriorityFeePerGas
               ? BigInt(step.transactionRequest.maxPriorityFeePerGas)
               : undefined,
@@ -432,10 +433,7 @@ export class EthereumStepExecutor extends BaseStepExecutor {
     // Check if message signing is disabled - useful for smart contract wallets
     // We also disable message signing for custom steps
     const disableMessageSigning =
-      this.executionOptions?.disableMessageSigning ||
-      step.type !== 'lifi' ||
-      // We disable message signing for tokens with '₮' symbol
-      !isTokenMessageSigningAllowed(step.action.fromToken)
+      this.executionOptions?.disableMessageSigning || step.type !== 'lifi'
 
     // Check if chain has Permit2 contract deployed. Permit2 should not be available for atomic batch.
     const permit2Supported =
@@ -534,9 +532,20 @@ export class EthereumStepExecutor extends BaseStepExecutor {
 
       await checkBalance(client, this.client.account!.address, step)
 
+      // Make sure that the client and chain is still correct
+      const updatedClient = await this.checkClient(step, process)
+      if (!updatedClient) {
+        return step
+      }
+
       // Try to prepare a new transaction request and update the step with typed data
       let { transactionRequest, isRelayerTransaction } =
-        await this.prepareUpdatedStep(client, step, signedTypedData)
+        await this.prepareUpdatedStep(
+          client,
+          updatedClient,
+          step,
+          signedTypedData
+        )
 
       process = this.statusManager.updateProcess(
         step,
diff --git a/packages/sdk/src/core/utils.ts b/packages/sdk/src/core/utils.ts
index 6caa284a..66a83740 100644
--- a/packages/sdk/src/core/utils.ts
+++ b/packages/sdk/src/core/utils.ts
@@ -1,4 +1,4 @@
-import type { ChainId, ExtendedChain, LiFiStep, Token } from '@lifi/types'
+import type { ChainId, ExtendedChain, LiFiStep } from '@lifi/types'
 import type { RPCUrls } from '../types/core.js'
 
 // Standard threshold for destination amount difference (0.5%)
@@ -57,15 +57,3 @@ export function getRpcUrlsFromChains(
   }
   return result
 }
-
-/**
- * Checks whether a given token is eligible for message signing.
- * Tokens with '₮' symbol in their name are disallowed,
- * since such tokens may have non-standard signing requirements or compatibility issues with hardware wallets.
- *
- * @param token - The token object to check.
- * @returns true if the token is allowed for message signing, false otherwise.
- */
-export const isTokenMessageSigningAllowed = (token: Token): boolean => {
-  return !token.name?.includes('₮') && !token.symbol?.includes('₮')
-}
diff --git a/packages/sdk/src/index.ts b/packages/sdk/src/index.ts
index b6c83082..680155a0 100644
--- a/packages/sdk/src/index.ts
+++ b/packages/sdk/src/index.ts
@@ -37,7 +37,6 @@ export {
 } from './core/execution.js'
 export { StatusManager } from './core/StatusManager.js'
 export { stepComparison } from './core/stepComparison.js'
-export { isTokenMessageSigningAllowed } from './core/utils.js'
 export { waitForDestinationChainTransaction } from './core/waitForDestinationChainTransaction.js'
 export { BaseError } from './errors/baseError.js'
 export type { ErrorCode } from './errors/constants.js'
@@ -66,6 +65,7 @@ export type {
   Process,
   ProcessStatus,
   ProcessType,
+  RequestInterceptor,
   RouteExecutionData,
   RouteExecutionDataDictionary,
   RouteExecutionDictionary,
diff --git a/packages/sdk/src/types/core.ts b/packages/sdk/src/types/core.ts
index 9d81a917..9ed7f3cd 100644
--- a/packages/sdk/src/types/core.ts
+++ b/packages/sdk/src/types/core.ts
@@ -14,6 +14,11 @@ import type {
   TokenAmount,
 } from '@lifi/types'
 import type { Client } from 'viem'
+import type { ExtendedRequestInit } from './request.js'
+
+export type RequestInterceptor = (
+  request: ExtendedRequestInit
+) => ExtendedRequestInit | Promise<ExtendedRequestInit>
 
 export interface SDKBaseConfig {
   apiKey?: string
@@ -27,6 +32,8 @@ export interface SDKBaseConfig {
   widgetVersion?: string
   debug: boolean
   preloadChains?: boolean
+  chainsRefetchInterval?: number
+  requestInterceptor?: RequestInterceptor
 }
 
 export interface SDKConfig extends Partial<Omit<SDKBaseConfig, 'integrator'>> {
diff --git a/packages/sdk/src/utils/request.ts b/packages/sdk/src/utils/request.ts
index 559c653d..53144fe9 100644
--- a/packages/sdk/src/utils/request.ts
+++ b/packages/sdk/src/utils/request.ts
@@ -24,7 +24,8 @@ export const request = async <T = Response>(
     retries: requestSettings.retries,
   }
 ): Promise<T> => {
-  const { userId, integrator, widgetVersion, apiKey } = config
+  const { userId, integrator, widgetVersion, apiKey, requestInterceptor } =
+    config
 
   if (!integrator) {
     throw new SDKError(
@@ -71,6 +72,10 @@ export const request = async <T = Response>(
       'x-lifi-integrator': integrator,
     }
 
+    if (requestInterceptor) {
+      options = await requestInterceptor(options)
+    }
+
     const response: Response = await fetch(
       url,
       stripExtendRequestInitProperties(options)
@@ -82,12 +87,10 @@ export const request = async <T = Response>(
 
     return await response.json()
   } catch (error) {
-    if (options.retries > 0 && (error as HTTPError).status === 500) {
+    const retries = options.retries ?? 0
+    if (retries > 0 && (error as HTTPError).status === 500) {
       await sleep(500)
-      return request<T>(config, url, {
-        ...options,
-        retries: options.retries - 1,
-      })
+      return request<T>(config, url, { ...options, retries: retries - 1 })
     }
 
     await (error as HTTPError).buildAdditionalDetails?.()