Building Blockchain Projects

The testrpc command-line application

The testrpc command can be used to simulate an Ethereum node. To install this command-line app, you need to install ethereumjs-testrpc globally:

npm install -g ethereumjs-testrpc

Here are the various options that can be provided:

• -a or --accounts: This specifies the number of accounts to be generated at startup.

• -b or --blocktime: This specifies the blocktime in seconds for automatic mining. The default is 0, and there's no auto-mining.
• -d or --deterministic: Whenever the node is run, it will generate 10 deterministic addresses; that is, when you provide this flag, the same set of addresses are generated every time. This option can be used to generate deterministic addresses based on a predefined ...