TronLink's tronWeb and tronLink objects provide APIs for developers to add Tokens to TronLink to be displayed in the TronLink asset list.
Developers can provide a button in the project to add the specified Token directly to the list of assets displayed in the user's TronLink Chrome plugin.
Note:
Currently, only the main network and Nile test network assets are supported to add, not shasta test network assets
The request function and its parameters are described as follows:
The TronWeb request calls a method of the TronLink plugin.
Parameter description request receives one parameter, which is an object containing method and params method: The method of the TronLink plugin to be called, currently wallet_watchAsset is supported. params: The parameters of the method method above. The following is the description of the wallet_watchAsset parameters
Add TRC-10 asset
When the code is executed, TronLink will pop up a window for the user to confirm or cancel the addition of a TRC-10.

Click the "Add" button, the asset will be displayed in the asset list.

Add TRC-20 asset
When the code is executed, TronLink will pop up a window for the user to confirm or cancel the addition of a TRC-20.

Click the "Add" button, the asset will be displayed in the asset list.

Add TRC-721 asset
When the code is executed, TronLink will pop up a window for the user to confirm or cancel the addition of a TRC-721.

Click the "Add" button, the TRC-721 asset will be displayed in the collectibles list.
