fix gaslimit when estimate gas is failing

libs/remix-lib/src/execution/txRunnerWeb3.ts

@@ -168,7 +168,8 @@ export class TxRunnerWeb3 {
           }
           err = network.name === 'VM' ? null : err // just send the tx if "VM"
           gasEstimationForceSend(err, () => {
-            tx['gas'] = gasLimit
+            const defaultGasLimit = 3000000
+            tx['gas'] = gasLimit === '0x0' ? '0x' + defaultGasLimit.toString(16) : gasLimit
 
             if (this._api.config.getUnpersistedProperty('doNotShowTransactionConfirmationAgain')) {
               return this._executeTx(tx, network, null, this._api, promptCb, callback)

libs/remix-ui/run-tab/src/lib/components/gasLimit.tsx

@@ -4,7 +4,7 @@ import React, { useEffect, useRef } from 'react'
 import {FormattedMessage} from 'react-intl'
 import {GasPriceProps} from '../types'
 
-const defaultGasLimit = 500000
+const defaultGasLimit = 3000000
 export function GasLimitUI(props: GasPriceProps) {
   const auto = useRef(true)
   const inputComponent = useRef<HTMLInputElement>(null)