Networks and APP deployment

Even the smallest project will interact with at the very least two blockchain nodes: One on the developer’s machine, and the other representing the network where the developer will eventually deploy their application (such as the main public PlatON network or a private consortium network, for instance). Truffle provides a system for managing the compilation and deployment artifacts for each network, and does so in a way that simplifies final application deployment.

Configuration

See the Configuration section for more information.

Specifying a network

Most platon truffle commands will behave differently based on the network specified, and will use that network’s contracts and configuration. You can specify a network using the --network option, like below:

$ platon-truffle migrate --network live

In this example, platon truffle will run your migrations on the “live” network, which – if configured like the example – is associated with the public PlatON blockchain.

Specifying a wasm contract

If you want to deploy a specific wasm contract(contract file like contracts/test.cpp), you can use the following command：

$ platon-truffle migrate --wasm --contract-name test

Build artifacts

As mentioned in the Compiling contracts section, build artifacts are stored in the ./build/contracts directory as .json files. When you compile your contracts or run your migrations using a specific network, platon truffle will update those .json files so they contain the information related to that network. When those artifacts are used later – such as within your frontend or application, they’ll automatically detect which network the PlatON client is connected to and use the correct contract artifacts accordingly.

Application deployment

Because the network is auto-detected by the contract artifacts at runtime, this means that you only need to deploy your application or frontend once. When you run your application, the running PlatON client will determine which artifacts are used, and this will make your application very flexible.