You can put a NFT for sale through your Tropix wallet or through Metamask.

For each of them, there are steps to be followed and which may involve fees (Gas) related to the network in which the NFT will be sold.

These fees pertain to the blockchain network, i.e. this is not a Tropix fee and no amount will be sent to us.

**Tropix Wallet**

1st step - Approve NFT for sale:

If the wallet has not carried out any purchase/sale action with the contract in which the NFT is registered, it will need to give permission to move the NFT in the contract to be able to list (put on sale) the NFT
The next actions that the user performs in this contract, this step will be completed and will not involve fees

2nd step - Confirm listing:

- This is the step in which the listing is registered on the blockchain.

**Metamask**

1st step - Initialize wallet

If the wallet has not yet been associated with the Tropix marketplace, a signature is required to validate whether the wallet belongs to the user
This step will only be necessary for the first buy/sell action with Metamask or any external wallet
Wallet initialization is not required in Tropix wallet as it is already created associated with the marketplace

2nd step - Approve work for sale:

If the portfolio has not carried out any purchase/sale action with the contract in which the NFT is located, it will need to give permission to move the NFT in the contract to be able to list the NFT
The next actions that the user performs in this contract, this step will continue as completed and will not involve fees

3rd step - Confirm listing:

- This is the step in which the listing is registered on the blockchain.
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