All interactions with Ethereum nodes in the system are primarily web 3.js. There are many APIs in Web3.js, including account-related, transaction-related and Block-related features.<br>But you need Web 3 Provider to connect the Ethereum node before you call.<br>The initialization of the Web3 Provider process is detailed in Figure 47, where the local Ganache or Ropsten nodes are connected via Web3 Provider for subsequent API calls.
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