# Token allowance

## Definition

A token allowance is the remaining amount a token owner has authorized a spender to transfer under an approval-based token contract such as ERC-20.

## What it means in practice

Allowance can be finite or effectively unlimited and persists on-chain until spent, changed or revoked according to the contract.

## How this concept appears in Terenval Wallet

Terenval users interacting with compatible dApps should treat allowance as a continuing on-chain permission, not merely a one-time popup.

**Important:** Review and revoke unnecessary allowances through trusted tools or protocol interfaces when appropriate.

**[Install Terenval Wallet](https://wallet.terenval.com/?lang=en)**

## Related terms

- [Token approval](https://wallet.terenval.com/glossary/token-approval/)
- [ERC 20](https://wallet.terenval.com/glossary/erc-20/)
- [token approval scam](https://wallet.terenval.com/glossary/token-approval-scam/)
- [dApp permission](https://wallet.terenval.com/glossary/dapp-permission/)
- [smart contract](https://wallet.terenval.com/glossary/smart-contract/)
- [walletconnect](https://wallet.terenval.com/glossary/walletconnect/)

## Related Terenval Answers

- [How to Secure a Non-Custodial Crypto Wallet](https://wallet.terenval.com/answers/how-to-secure-non-custodial-crypto-wallet/)
- [How to Send Crypto Safely Between Wallets](https://wallet.terenval.com/answers/how-to-send-crypto-safely-between-wallets/)
- [Can One Crypto Wallet Manage Multiple Blockchains?](https://wallet.terenval.com/answers/can-one-crypto-wallet-manage-multiple-blockchains/)

## Sources

- https://ethereum.org/en/defi/
- https://docs.walletconnect.network/
- https://wallet.terenval.com/info/security/

Official page: https://wallet.terenval.com/glossary/token-allowance/