A token approval is a permission your wallet gives to a smart contract, allowing it to spend a particular token on your behalf. Many DeFi actions, such as swapping on a DEX, require an approval first so the contract can move your tokens when you trade. Approvals can be limited to an exact amount or, dangerously, set to unlimited.<\/p>\n
This matters because an approval is a standing permission that persists after the transaction. If you grant an unlimited approval to a malicious or later-compromised contract, it can drain that token whenever it wants, without asking again.<\/p>\n
Example: to swap a stablecoin on a DEX, you first approve the DEX contract to spend it; if you approve an unlimited amount, that permission stays active until you revoke it.<\/p>\n
Safety note: prefer approving only the amount you need, review what each approval grants, and periodically check and revoke old or unlimited approvals using a trusted approval-checker. A malicious approval is how many wallet-drainer scams actually steal funds, even without ever touching your seed phrase. Related terms include revoke, wallet-drainer, smart contract, and allowance.<\/p>\n","protected":false},"excerpt":{"rendered":"
A permission you grant a smart contract to move a specific token from your wallet, sometimes up to an unlimited amount.<\/p>\n","protected":false},"template":"","meta":[],"class_list":["post-89","glossary","type-glossary","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/tokenspin.de.com\/pt-br\/wp-json\/wp\/v2\/glossary\/89","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tokenspin.de.com\/pt-br\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/tokenspin.de.com\/pt-br\/wp-json\/wp\/v2\/types\/glossary"}],"wp:attachment":[{"href":"https:\/\/tokenspin.de.com\/pt-br\/wp-json\/wp\/v2\/media?parent=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}