diff --git a/src/evm/engine/ether/index.ts b/src/evm/engine/ether/index.ts
index 78e2f51..1bb315c 100644
--- a/src/evm/engine/ether/index.ts
+++ b/src/evm/engine/ether/index.ts
@@ -124,7 +124,7 @@ export class EthersEvmEngine implements IEVMEngine {
      */
     private async generateTransaction(
         input: EvmInput,
-        options: EvmTransactionOptions
+        options?: EvmTransactionOptions
     ): Promise<EvmOutput<TransactionRequest>> {
         if (!this.provider || !this.contract) {
             return {
@@ -463,7 +463,7 @@ export class EthersEvmEngine implements IEVMEngine {
      */
     async send(
         input: EvmInput,
-        options: EvmTransactionOptions
+        options?: EvmTransactionOptions
     ): Promise<EvmOutput<any>> {
         if (!this.provider || !this.contract) {
             return {
@@ -551,7 +551,7 @@ export class EthersEvmEngine implements IEVMEngine {
      */
     async sign(
         input: EvmInput,
-        options: EvmTransactionOptions
+        options?: EvmTransactionOptions
     ): Promise<EvmOutput<string>> {
         if (!this.provider || !this.contract) {
             return {
diff --git a/src/evm/engine/utils/index.ts b/src/evm/engine/utils/index.ts
index 90155ed..93f8a08 100644
--- a/src/evm/engine/utils/index.ts
+++ b/src/evm/engine/utils/index.ts
@@ -201,11 +201,11 @@ export function parseEvmReplyData(data: any): Array<any> | any {
  */
 export function getFromAddress(
     wallet: IWallet,
-    options: EvmTransactionOptions
+    options?: EvmTransactionOptions
 ): string {
     let result: string
     const fromResult = wallet && wallet.getDefault()
-    if (!options.from) {
+    if (!options || !options.from) {
         if (!fromResult || !fromResult.ok || !fromResult.data) {
             return ""
         } else {
@@ -229,11 +229,11 @@ export function getFromAddress(
  */
 export function getFromPrivateKey(
     wallet: IWallet,
-    options: EvmTransactionOptions
+    options?: EvmTransactionOptions
 ): string {
     let result: string
     const fromResult = wallet && wallet.getDefault()
-    if (!options.privateKey || !options.from) {
+    if (!options || !options.privateKey || !options.from) {
         if (!fromResult || !fromResult.ok || !fromResult.data) {
             return ""
         } else {
diff --git a/src/evm/engine/web3/index.ts b/src/evm/engine/web3/index.ts
index 9534bb2..4119ba9 100644
--- a/src/evm/engine/web3/index.ts
+++ b/src/evm/engine/web3/index.ts
@@ -132,7 +132,7 @@ export class Web3EvmEngine implements IEVMEngine {
      */
     private async generateTransaction(
         input: EvmInput,
-        options: EvmTransactionOptions
+        options?: EvmTransactionOptions
     ): Promise<EvmOutput<Web3Transaction>> {
         if (!this.web3Object || !this.contractObject) {
             return {
@@ -583,7 +583,7 @@ export class Web3EvmEngine implements IEVMEngine {
      */
     async send(
         input: EvmInput,
-        options: EvmTransactionOptions
+        options?: EvmTransactionOptions
     ): Promise<EvmOutput<any>> {
         if (!this.web3Object || !this.contractObject) {
             return {
@@ -705,7 +705,7 @@ export class Web3EvmEngine implements IEVMEngine {
      */
     async sign(
         input: EvmInput,
-        options: EvmTransactionOptions
+        options?: EvmTransactionOptions
     ): Promise<Result<Web3Signature>> {
         if (!this.web3Object || !this.contractObject) {
             return {
diff --git a/src/evm/interface/index.ts b/src/evm/interface/index.ts
index a1c1048..4fe3a56 100644
--- a/src/evm/interface/index.ts
+++ b/src/evm/interface/index.ts
@@ -255,7 +255,7 @@ export interface IEVMEngine {
      */
     send(
         input: EvmInput,
-        options: EvmTransactionOptions
+        options?: EvmTransactionOptions
     ): Promise<EvmOutput<TransactionReceipt>>
 
     /**
@@ -275,7 +275,7 @@ export interface IEVMEngine {
      */
     sign(
         input: EvmInput,
-        options: EvmTransactionOptions
+        options?: EvmTransactionOptions
     ): Promise<EvmOutput<Signature>>
 }