# Buy Resources (v2)

#### Information about two methods of purchasing resources using Tronsave's API key and a signed transaction:

### [**Using Signed Transaction**](/developer/buy-resources-v2/use-signed-transaction.md)

* In this method, users create a transaction and sign it with their private key.
* The signed transaction is then sent to the blockchain network for validation and execution. This ensures that only the owner of the private key can perform the transaction.

**Advantages**:

* A high level of security is required when signing with a private key.
* More control over payment funds, as customers manage them directly.

**Disadvantages**:

* Transactions sent to the blockchain network will incur additional transaction fees.
* More complex integration requires an understanding of transaction signing and validation processes.

### [**Using API Key**](/developer/buy-resources-v2/use-api-key.md)

* To use the API key, you need to create a Tronsave internal account and deposit funds into it. \[[Read the full guide here](/developer/get-api-key.md)]
* After creating the internal account, an API key will be generated, which will be used to authenticate your transactions.

**Advantages**:

* Fast and secure transactions.
* Easy integration.
* Save Transaction Fees

**Disadvantages**:

* Funds need to be deposited into the internal account to execute transactions.
* The Tronsave system will manage the customer's internal account.


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