Ethereum Smart Contract Development

Building a private blockchain

1. In order to create a private blockchain, we first open the Cygwin command line and create a folder and files, using the following commands:

    $  mkdir Ethereum
    $  cd Ethereum
    $  mkdir Project
    $  cd Project
    $  mkdir chaindata
    $  vi genesis.json   ## this line opens the vim editor where we paste the content of genesis file
          ## we save the file content using command [Esc button press] wq
    $  ls -lha    ## this command list down the folder structure as shown in Figure 3.28  

Figure 3.28: genesis.json file always outside chaindata folder

2. Now, in a separate Cygwin command window, we start geth, using the command $ geth. As in ...