Building Blockchain Projects

Deploying contracts

Even the smallest project will interact with at least two blockchains: one on the developer's machine, such as the EthereumJS TestRPC, and the other representing the network where the developer will eventually deploy their application (this could be the main ethereum network or a private consortium network, for instance).

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

JavaScript files that contain code to deploy contracts to the ethereum network are called migrations. These ...