# FAQ - [What is cold wallet?](https://coinsdo.gitbook.io/docs/coinwallet/faq/what-is-cold-wallet.md) - [What are gas fees?](https://coinsdo.gitbook.io/docs/coinwallet/faq/what-are-gas-fees.md) - [What is inactive address/account on TRX?](https://coinsdo.gitbook.io/docs/coinwallet/faq/what-is-inactive-address-account-on-trx.md) - [What if I send crypto to a wrong address?](https://coinsdo.gitbook.io/docs/coinwallet/faq/what-if-i-send-crypto-to-a-wrong-address.md) - [What is 'The address TRX balance is less than the gas fee required'?](https://coinsdo.gitbook.io/docs/coinwallet/faq/what-is-the-address-trx-balance-is-less-than-the-gas-fee-required.md) - [How to recover assets wrongly transferred to the same address on different blockchain?](https://coinsdo.gitbook.io/docs/coinwallet/faq/how-to-recover-assets-wrongly-transferred-to-the-same-address-on-different-blockchain.md) - [Why do I need to approve token?](https://coinsdo.gitbook.io/docs/coinwallet/faq/why-do-i-need-to-approve-token.md) - [What is Hierarchical Deterministic (HD) Wallet?](https://coinsdo.gitbook.io/docs/coinwallet/faq/what-is-hierarchical-deterministic-hd-wallet.md) - [What is wallet security upgrade?](https://coinsdo.gitbook.io/docs/coinwallet/faq/what-is-wallet-security-upgrade.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://coinsdo.gitbook.io/docs/coinwallet/faq.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.