# Transaction error: cannot estimate gas

**URL:** <https://community.metamask.io/t/transaction-error-cannot-estimate-gas/26800>\
**Category:** Support\
**Created:** [August 27, 2023, 9:55am UTC](https://community.metamask.io/t/transaction-error-cannot-estimate-gas/26800 "2023-08-27T09:55:21Z")\
**Posts on this page:** 1\
**Showing post:** 8

<div class="post-metadata">

**Author:** ![Mandip](https://dub1.discourse-cdn.com/metamask/user_avatar/community.metamask.io/mandip/32/24243_2.png) [@Mandip](https://community.metamask.io/u/Mandip)\
**Post date:** [August 28, 2023, 1:56pm UTC](https://community.metamask.io/t/transaction-error-cannot-estimate-gas/26800/8 "2023-08-28T13:56:55Z")

</div>

Please visit revoke tool website to check how many token approval allowances has been set.

You may revoke the permissions if set below than the current amount you are trying to Bridge and after revoking try again to bridge to starknet using starkgate. Below is the link for revoke tools.

> **[How to revoke smart contract allowances/token approvals](https://support.metamask.io/hc/en-us/articles/4446106184731-How-to-revoke-smart-contract-allowances-token-approvals)**
>
> Note: smart contract allowances are different from simply connecting your wallet to a dapp. For information on disconnecting your wallet from dapps, see here. 
> Smart contract/token allowances, also...

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_[View the full topic](https://community.metamask.io/t/transaction-error-cannot-estimate-gas/26800)._