> For the complete documentation index, see [llms.txt](https://doc.lockerprotocol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.lockerprotocol.com/vault/sign-a-transaction/tron.md).

# Tron review screen

Fee limit and permission id explained.

{% stepper %}
{% step %}

### The transaction

The headline names the kind of request: **TRX transfer**, **Token transfer (TRC-20)**, **Token approval (TRC-20)**, **Smart-contract call** or **ACCOUNT PERMISSION CHANGE**. Below: **Recipient**, **Amount**, **Token contract**, **Valid until**, and the signing account.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-e66ef11e988488f82b959ce67156b2df8ee2dbfa%2F01-tx-review.png?alt=media" alt="tx review"><figcaption><p>A TRC-20 transfer decoded on the Vault.</p></figcaption></figure>
{% endstep %}

{% step %}

### Fee limit

**Fee limit** is the most TRX you allow the network to burn for this call. It is **burned even if the transaction fails**, so a very high limit is a warning sign.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-7a91d2a72b54c8c7566958b665be227fb2ea396e%2F02-fee-limit.png?alt=media" alt="fee limit"><figcaption><p>The fee limit and its note.</p></figcaption></figure>
{% endstep %}

{% step %}

### Permission id and validity

A request past its **Valid until** time is refused outright. Tron accounts can also delegate signing to other keys. If the request signs under a delegated or multisig **permission #N**, the Vault says so. Make sure you expect that. An **ACCOUNT PERMISSION CHANGE** decides *who controls the account*; a malicious one hands it over permanently.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-76fe47be87ca436ae4bd41370523ac9d4b1d68d0%2F03-permission-id.png?alt=media" alt="permission id"><figcaption><p>A request the Vault refuses: here, an expired transaction.</p></figcaption></figure>
{% endstep %}
{% endstepper %}

{% hint style="info" %}
**A contract type the Vault does not decode** shows **Contract type not decoded** on a **grey** strip: *this contract type is not decoded here, nothing alarming was found.* Known contracts are named (*USDT*, *USDC*, *WTRX*, *JST*). An **ACCOUNT PERMISSION CHANGE** stays red with its checkbox.
{% endhint %}

{% hint style="info" %}
Tokens not on the Vault's verified list show their amount in **raw units**. Verify the contract address yourself before signing.
{% endhint %}

## Learn more

* [Send Tron from the extension](/browser-extension/send/tron.md)


---

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