Setting up Coding Environment - Revision history

Bacchas at 22:34, 13 March 2018

2018-03-13T22:34:11Z

← Older revision		Revision as of 22:34, 13 March 2018
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	==Exit NPM NODE ==		==Exit NPM NODE ==
	.exit		.exit

			==[[#top\|Back To Top]]-[[Main_Page\| Home]] - [[Solidity_ethereum_Language\|Category]]==

Bacchas at 00:55, 11 March 2018

2018-03-11T00:55:10Z

← Older revision		Revision as of 00:55, 11 March 2018
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	Create an instance of the contract		Create an instance of the contract
			greetingsInstance = greetingsContrace.at(greetingsDeployed.address)

			now we can interact with the contract
			greetingsInstance.getGreetings()
			greetingsInstance.setGreetings("hello", {from: web3.eth.accounts[0]})

			==Exit NPM NODE ==
			.exit

Bacchas at 00:48, 11 March 2018

2018-03-11T00:48:11Z

← Older revision		Revision as of 00:48, 11 March 2018
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	Install javascript libraries needed for this projects		Install javascript libraries needed for this projects
	npm install web3@0.20.0 solc@0.4.18		npm install web3@0.20.0 solc@0.4.18
			=Compile Code=
			Start Ganache
			Go the the root of your project
			Start a node console
			node
			Web3 = require('web3')
			web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:7545"))
			//last line creates a new web3 object and connect it to the local ganache node
			web3.eth.accounts // this will now list he 10 accounts on ganache

			Load source and compile it
			load library from npm dependencies
			solc = require('solc')
			sourceCode = fs.readFileSync('greetings.sol').toString()
			// this loads the source code into a string

			Now we compile it
			compileCode = solc.compile(sourceCode)

			Get the ABI interface
			contractABI = JSON.parse(compiledCode.contracts[':Greetings'].interface)
			// The greetings is one in the constructor, thats why its upper case

			steps to Deploy contract to Ethereum Node
			greetingsContract = web3.eth.contract(contractABI)
			extract bytecode
			byteCode = compileCode.contracts[':Greetings'].bytecode
			Deploy Contract
			greetingsDeployed = greetingsContract.new({data:byteCode, from: web3.eth.accounts[0],gas: 4700000})

			Create an instance of the contract

Bacchas: Created page with "Go into the directory that has the project npm init Accepts all defaults Install javascript libraries needed for this projects npm install web3@0.20.0 solc@0.4.18"

2018-03-11T00:06:15Z

Created page with "Go into the directory that has the project npm init Accepts all defaults Install javascript libraries needed for this projects npm install web3@0.20.0 solc@0.4.18"

New page

Go into the directory that has the project
npm init
Accepts all defaults
Install javascript libraries needed for this projects
npm install web3@0.20.0 solc@0.4.18