Created
September 20, 2017 08:38
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solutions.hamburg | web3 example | DO NOT USE IN PRODUCTION
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| web3.eth.accounts; | |
| web3.personal.unlockAccount(web3.eth.accounts[0], "solutions.hamburg", 3600); | |
| // abi def | |
| var helloworldJsonDef = [{ | |
| "constant": true, | |
| "inputs": [{"name": "a", "type": "uint256"}, {"name": "b", "type": "uint256"}], | |
| "name": "add", | |
| "outputs": [{"name": "result", "type": "uint256"}], | |
| "payable": false, | |
| "stateMutability": "view", | |
| "type": "function" | |
| }, { | |
| "constant": false, | |
| "inputs": [{"name": "_name", "type": "string"}], | |
| "name": "hello", | |
| "outputs": [], | |
| "payable": false, | |
| "stateMutability": "nonpayable", | |
| "type": "function" | |
| }, {"inputs": [], "payable": false, "stateMutability": "nonpayable", "type": "constructor"}, { | |
| "anonymous": false, | |
| "inputs": [{"indexed": true, "name": "from", "type": "address"}, { | |
| "indexed": false, | |
| "name": "name", | |
| "type": "string" | |
| }, {"indexed": false, "name": "message", "type": "string"}], | |
| "name": "Greeting", | |
| "type": "event" | |
| }]; | |
| var helloworldContract = web3.eth.contract(helloworldJsonDef); | |
| // deploy | |
| var helloworldDeploy = helloworldContract.new( | |
| { | |
| from: web3.eth.accounts[0], | |
| data: '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', | |
| gas: '4300000' | |
| }, function (e, contract) { | |
| console.log(e, contract); | |
| if (typeof contract.address !== 'undefined') { | |
| console.log('Contract mined! address: ' + contract.address + ' transactionHash: ' + contract.transactionHash); | |
| } | |
| } | |
| ); | |
| var contractAddr = helloworldDeploy.address; | |
| // try | |
| var helloworld = web3.eth.contract(helloworldJsonDef).at(contractAddr); | |
| var event = helloworld.Greeting({}, {fromBlock: 0, toBlock: 'latest'}); | |
| event.watch(function (error, result) { | |
| if (!error) { | |
| console.log("From " + result.address + " To " + result.args.name + "@" + result.args.from + ":"); | |
| console.log(result.args.message); | |
| } | |
| }); | |
| helloworld.hello("dude", {from: web3.eth.accounts[0]}); | |
| helloworld.add(1, 3, {from: web3.eth.accounts[0]}); |
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