Build a dev environment

Before you start, make sure the environment meet the following requirements：

• Node.js v8.9.4 or higher
• Windows，Linux，or Mac OS X

Create a project

1. Create a project and enter the following command in the terminal：

mkdir testproject

2. Initialize the project, and enter the following command in the terminal：

cd testproject
truffle init

Once completed, you will get a project structure like below:

contracts/：Truffle default contract files directory
migrations /：deployment scripts files directory
test /：contract or application test files directory
truffle-config.js：Truffle config files.

3. contracts write your own contract under this directory.

Compile and deploy a project

1. To compile a Truffle project, please go to the root directory of the project and enter the following command in the terminal:

truffle compile

2. To configure GateChain network, please go to “truffle-config.js” file.

const HDWalletProvider = require('truffle-hdwallet-provider');
const fs = require('fs');
const mnemonic = fs.readFileSync(".secret").toString().trim();
	
	module.exports = {
	  networks: {
	    GateChain: {
	      provider: () => new HDWalletProvider(mnemonic, `https://evm.gatenode.cc`),
	      network_id: 86,
	      gas: 6000000,
	      timeoutBlocks: 200,
	      skipDryRun: true
	    },
	  },
	
	  mocha: {
	    timeout: 100000 // prevents tests from failing when pc is under heavy load
	  },
	
	  compilers: {
	    solc: {
	    }
	  }
	}

Please note：the mnemonic phrase for MetaMask account is required. Please fetch the mnemonic phrase from the deployed account, method：MetaMask-Setup-Security and Privacy，create a new .secret file from the root directory and enter the mnemonic phrase to start

3. Deploy the project, and enter the following command in the terminal：

truffle migrate --network GateChain

4. Contract will be deployed in GateChain network, as below：

	Compiling your contracts...
	===========================
	> Everything is up to date, there is nothing to compile.
		
		
	Starting migrations...
	======================
	> Network name:    'GateChain'
	> Network id:      86
	> Block gas limit: 4294967295 (0xffffffff)
		
		
	1_initial_migration.js
	======================
		Replacing 'Migrations'
		----------------------
		> transaction hash:    0x2eaa10bd0a8cdd55022fd6a16372659a5fd52151b216a82d07f397c1c91642fe
		> Blocks: 0            Seconds: 4
		> contract address:    0x871e6B5eEaC4d69E33880cac1997F1374302eddC
		> block number:        98767
		> block timestamp:     1614756393
		> account:             0x06ae7981a16379fD627a879Ec017AaDFaa4BEf59
		> balance:             260.04901
		> gas used:            128511 (0x1f5ff)
		> gas price:           10000 gwei
		> value sent:          0 ETH
		> total cost:          1.28511 ETH
		   
	Summary
	=======
	> Total deployments:   1
	> Final cost:          1.28511 ETH
	

Please note, the above are examples only for helping you have a better understanding about the structure.