Node Service

Author of this section: @Fish, @ Xiaofu

node services are essential for DApp development. In this talk, we introduce the concept of node services and guide you to configure node services in your project and prepare some Sepolia test Net ETH through taps.

What is Node Service

node services are essential for DApp development. It is a service that runs on the blockchain network and helps you interact with the blockchain network. In DApp development, we need to use node services to obtain blockchain data and send transactions.

In the Ethereum network, we can ZAN , Infura , Alchemy and other service providers to obtain node services. These service providers all provide free node services. Of course, they also provide paid services. If your DApp needs higher performance, you can consider using their paid services.

Configure node services

here node Service of ZAN as an example, guide you how to configure the Node Service.

First register and login https://zan.top after that, enter the console of the node service. https://zan.top/service/apikeys create a Key, each Key has a default free quota, which is enough for micro projects, but for projects in the production environment, please purchase node services based on the actual situation.

After successful creation, you will see the following page:

select the Node Service address of the Ethereum main network and add the copied address to WagmiWeb3ConfigProvider of http() method. As follows:

<WagmiWeb3ConfigProvider
  chains={[Mainnet]}
  transports={{
-   [mainnet.id]: http(),
+   [Mainnet.id]: http('https://api.zan.top/node/v1/eth/mainnet/{YourZANApiKey}'),
  }}
 >

in the above code YourZANApiKey you need to replace it with your own Key. In addition, in the actual project, in order to avoid abuse of your Key, it is recommended that you put the Key into the back-end service, and then call the node service through the back-end service, or set the domain name white list in the console of ZAN to reduce the risk of abuse. Of course, you can continue to use it directly in the tutorial. http() to use wagmi's built-in default experimental node service.

Similarly, if you are using the Infura or Alchemy node service, you can also add their Node Service address to WagmiWeb3ConfigProvider of http() method.

Get test Net ETH from tap

in addition to node services, ETH for testing is also an essential part of development. Usually, we can get it through the tap service. A Faucet is an online service that provides a free test Net cryptocurrency (usually a small token) for testing in a development environment. These services are typically provided by testnet officials, developer communities, Node Service technology providers, etc.

For example, you can pass ZAN faucet service to obtain a certain amount of Sepolia test Net ETH for testing.

Please fill in the wallet address in the faucet web page illustrated above and receive the appropriate amount of test Web SepoliaETH, which we may use later in the course.

This 0.01 SepoliaETH