feat: update simulate tx

__tests__/account.test.ts

@@ -65,6 +65,16 @@ describe('deploy and test Wallet', () => {
     innerInvokeEstFeeSpy.mockClear();
   });
 
+  test('simulate transaction', async () => {
+    const res = await account.simulateTransaction({
+      contractAddress: erc20Address,
+      entrypoint: 'transfer',
+      calldata: [erc20.address, '10', '0'],
+    });
+    expect(res).toHaveProperty('fee_estimation');
+    expect(res).toHaveProperty('trace');
+  });
+
   test('read balance of wallet', async () => {
     const x = await erc20.balanceOf(account.address);
 

src/account/default.ts

@@ -24,6 +24,7 @@ import {
   InvokeFunctionResponse,
   KeyPair,
   MultiDeployContractResponse,
+  Sequencer,
   Signature,
   UniversalDeployerContractPayload,
 } from '../types';
@@ -498,4 +499,36 @@ export class Account extends Provider implements AccountInterface {
 
     return feeEstimate.suggestedMaxFee.toString();
   }
+
+  public async simulateTransaction(
+    calls: AllowArray<Call>,
+    { nonce: providedNonce, blockIdentifier }: EstimateFeeDetails = {}
+  ): Promise<Sequencer.TransactionSimulationResponse> {
+    const transactions = Array.isArray(calls) ? calls : [calls];
+    const nonce = toBN(providedNonce ?? (await this.getNonce()));
+    const version = toBN(feeTransactionVersion);
+    const chainId = await this.getChainId();
+
+    const signerDetails: InvocationsSignerDetails = {
+      walletAddress: this.address,
+      nonce,
+      maxFee: ZERO,
+      version,
+      chainId,
+    };
+
+    const signature = await this.signer.signTransaction(transactions, signerDetails);
+
+    const calldata = fromCallsToExecuteCalldata(transactions);
+    const response: any = await super.getSimulateTransaction(
+      { contractAddress: this.address, calldata, signature },
+      { version, nonce },
+      blockIdentifier
+    );
+
+    const suggestedMaxFee = estimatedFeeToMaxFee(response.fee_estimation.overall_fee);
+    response.fee_estimation.suggestedMaxFee = suggestedMaxFee;
+
+    return response;
+  }
 }

src/account/interface.ts

@@ -18,6 +18,7 @@ import {
   InvocationsDetails,
   InvokeFunctionResponse,
   MultiDeployContractResponse,
+  Sequencer,
   Signature,
   UniversalDeployerContractPayload,
 } from '../types';
@@ -308,4 +309,19 @@ export abstract class AccountInterface extends ProviderInterface {
     estimateFeeAction: EstimateFeeAction,
     details: EstimateFeeDetails
   ): Promise<BigNumberish>;
+
+  /**
+   * Estimate Fee for executing an INVOKE transaction on starknet
+   *
+   * @param calls the invocation object containing:
+   * - contractAddress - the address of the contract
+   * - entrypoint - the entrypoint of the contract
+   * - calldata - (defaults to []) the calldata
+   *
+   * @returns response from estimate_fee
+   */
+  public abstract simulateTransaction(
+    calls: AllowArray<Call>,
+    estimateFeeDetails?: EstimateFeeDetails
+  ): Promise<Sequencer.TransactionSimulationResponse>;
 }

src/provider/default.ts

@@ -15,6 +15,7 @@ import {
   Invocation,
   InvocationsDetailsWithNonce,
   InvokeFunctionResponse,
+  Sequencer,
   Status,
 } from '../types';
 import { BigNumberish } from '../utils/number';
@@ -184,4 +185,12 @@ export class Provider implements ProviderInterface {
   ): Promise<GetTransactionReceiptResponse> {
     return this.provider.waitForTransaction(txHash, retryInterval, successStates);
   }
+
+  public async getSimulateTransaction(
+    invocation: Invocation,
+    invocationDetails: InvocationsDetailsWithNonce,
+    blockIdentifier?: BlockIdentifier
+  ): Promise<Sequencer.TransactionSimulationResponse> {
+    return this.provider.getSimulateTransaction(invocation, invocationDetails, blockIdentifier);
+  }
 }

src/provider/interface.ts

@@ -16,6 +16,7 @@ import type {
   Invocation,
   InvocationsDetailsWithNonce,
   InvokeFunctionResponse,
+  Sequencer,
   Status,
 } from '../types';
 import type { BigNumberish } from '../utils/number';
@@ -278,4 +279,11 @@ export abstract class ProviderInterface {
     retryInterval?: number,
     successStates?: Array<Status>
   ): Promise<GetTransactionReceiptResponse>;
+
+  // todo documentation
+  public abstract getSimulateTransaction(
+    invocation: Invocation,
+    invocationDetails: InvocationsDetailsWithNonce,
+    blockIdentifier?: BlockIdentifier
+  ): Promise<Sequencer.TransactionSimulationResponse>;
 }

src/provider/rpc.ts

@@ -14,6 +14,7 @@ import {
   InvocationsDetailsWithNonce,
   InvokeFunctionResponse,
   RPC,
+  Sequencer,
 } from '../types';
 import fetch from '../utils/fetchPonyfill';
 import { getSelectorFromName } from '../utils/hash';
@@ -481,4 +482,12 @@ export class RpcProvider implements ProviderInterface {
   public async getEvents(eventFilter: RPC.EventFilter): Promise<RPC.GetEventsResponse> {
     return this.fetchEndpoint('starknet_getEvents', { filter: eventFilter });
   }
+
+  public async getSimulateTransaction(
+    _invocation: Invocation,
+    _invocationDetails: InvocationsDetailsWithNonce,
+    _blockIdentifier?: BlockIdentifier
+  ): Promise<Sequencer.TransactionSimulationResponse> {
+    throw new Error('RPC does not implement simulateTransaction function');
+  }
 }

src/provider/sequencer.ts

@@ -522,10 +522,10 @@ export class SequencerProvider implements ProviderInterface {
     return this.fetchEndpoint('estimate_message_fee', { blockIdentifier }, validCallL1Handler);
   }
 
-  public async simulateTransaction(
+  public async getSimulateTransaction(
     invocation: Invocation,
     invocationDetails: InvocationsDetailsWithNonce,
-    blockIdentifier: BlockIdentifier = 'pending'
+    blockIdentifier: BlockIdentifier = this.blockIdentifier
   ): Promise<Sequencer.TransactionSimulationResponse> {
     return this.fetchEndpoint(
       'simulate_transaction',