Encryption keys are just one component of cryptographic platforms. Learn how encryption is implemented in hardware through the use of hardware security modules. Uses of Smart Contracts To use DEXs, the first step is to decide which network a user wants to use, as each trade will incur a transaction fee. The next one is to choose a wallet compatible with the selected network and fund it with its native token. A native token is the token used to pay for transaction fees in a specific network.