docs : updata BoAT_User_Guide_en.md
updata BoAT_User_Guide_en.md
@@ -364,6 +364,7 @@ The smart contract used by the demo and its ABI JSON file are placed in:
Before running Ethereum's Demo, you need to install the Ethereum node simulator ganache, as well as the Ethereum smart contract compilation deployment tool truffle, could visit this website: https://truffleframework.com .
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Ganache has a ganache-cli version of the command line interface, and a Ganache version of the graphical interface. The ganache-cli of the command line interface and the Ganache 1.x version of the graphical interface will not be saved. If the process of ganache-cli or Ganache 1.x is terminated, the deployed contract will be lost. The command truffle migrate - reset Redeploy the contract, the address of the redeployed contract may change. The Ganache 2.x version of the graphical interface can create a Workspace save state. After closing and reopening the Workspace next time, the deployed contract still does not need to be redeployed.
In addition to using the ganache simulator, you can also use the Ethereum test network such as Ropsten (you need to apply for a free test token).
