diff --git a/packages/eth-providers/src/__tests__/utils.test.ts b/packages/eth-providers/src/__tests__/utils.test.ts
index 0aed45f57..b7b99ae88 100644
--- a/packages/eth-providers/src/__tests__/utils.test.ts
+++ b/packages/eth-providers/src/__tests__/utils.test.ts
@@ -447,14 +447,14 @@ describe('eth call error handling', () => {
 
   describe('checkEvmExecutionError', () => {
     const commonData = {
-      used_gas: '0x0',
-      used_storage: 0,
+      usedGas: '0x0',
+      usedStorage: 0,
       logs: [],
     };
 
     it('when should throw - reverted', () => {
       const data = {
-        exit_reason: { revert: 'Reverted' as const },
+        exitReason: { revert: 'Reverted' as const },
         value: invalidCurrencyIdHex,
         ...commonData,
       };
@@ -464,7 +464,7 @@ describe('eth call error handling', () => {
 
     it('when should throw - outOfFund', () => {
       const data = {
-        exit_reason: {
+        exitReason: {
           error: { outOfFund: null },
         },
         value: invalidCurrencyIdHex,
@@ -476,7 +476,7 @@ describe('eth call error handling', () => {
 
     it('when should throw - ExistentialDeposit', () => {
       const data = {
-        exit_reason: {
+        exitReason: {
           error: { other: 'ExistentialDeposit' },
         },
         value: invalidCurrencyIdHex,
@@ -489,7 +489,7 @@ describe('eth call error handling', () => {
     it('when should not throw', () => {
       {
         const data = {
-          exit_reason: { succeed: 'Returned' as const },
+          exitReason: { succeed: 'Returned' as const },
           value: '0x123456789',
           ...commonData,
         };
@@ -498,7 +498,7 @@ describe('eth call error handling', () => {
 
       {
         const data = {
-          exit_reason: { succeed: 'Stopped' as const },
+          exitReason: { succeed: 'Stopped' as const },
           value: '0x',
           ...commonData,
         };
diff --git a/packages/eth-providers/src/base-provider.ts b/packages/eth-providers/src/base-provider.ts
index ef4c41965..9f4096137 100644
--- a/packages/eth-providers/src/base-provider.ts
+++ b/packages/eth-providers/src/base-provider.ts
@@ -266,15 +266,15 @@ export interface PollFilters {
 }
 
 export interface CallReturnInfo {
-  exit_reason: {
+  exitReason: {
     succeed?: 'Stopped' | 'Returned' | 'Suicided';
     error?: any;
     revert?: 'Reverted';
     fatal?: any;
   };
   value: string;
-  used_gas: string;
-  used_storage: number;
+  usedGas: string;
+  usedStorage: number;
   logs: Log[];
 }
 
@@ -839,7 +839,10 @@ export abstract class BaseProvider extends AbstractProvider {
     return res.value;
   };
 
-  _ethCall = async (callRequest: SubstrateEvmCallRequest, at?: string) => {
+  _ethCall = async (
+    callRequest: SubstrateEvmCallRequest,
+    at?: string,
+  ): Promise<CallReturnInfo> => {
     const api = at ? await this.api.at(at) : this.api;
 
     // call evm rpc when `state_call` is not supported yet
@@ -847,10 +850,10 @@ export abstract class BaseProvider extends AbstractProvider {
       const data = await this.api.rpc.evm.call(callRequest);
 
       return {
-        exit_reason: { succeed: 'Returned' },
+        exitReason: { succeed: 'Returned' },
         value: data.toHex(),
-        used_gas: '0',
-        used_storage: 0,
+        usedGas: '0',
+        usedStorage: 0,
         logs: [],
       };
     }
@@ -1120,8 +1123,8 @@ export abstract class BaseProvider extends AbstractProvider {
     };
 
     const gasInfo = await this._ethCall(txRequest, blockHash);
-    const usedGas = BigNumber.from(gasInfo.used_gas).toNumber();
-    const usedStorage = gasInfo.used_storage;
+    const usedGas = BigNumber.from(gasInfo.usedGas).toNumber();
+    const usedStorage = gasInfo.usedStorage;
 
     /* ----------
        try using a gasLimit slightly more than actual used gas
diff --git a/packages/eth-providers/src/utils/utils.ts b/packages/eth-providers/src/utils/utils.ts
index 93764f30b..a26d43ff8 100644
--- a/packages/eth-providers/src/utils/utils.ts
+++ b/packages/eth-providers/src/utils/utils.ts
@@ -334,7 +334,7 @@ export const decodeRevertMsg = (hexMsg: string) => {
 export const checkEvmExecutionError = (data: CallReturnInfo): void => {
   if (!data) return;
 
-  const { exit_reason: exitReason, value: returnData } = data;
+  const { exitReason, value: returnData } = data;
   if (!exitReason.succeed) {
     let msg: string;
     let err: any;