Project to demonstrate compiling and deploying a simple smart contract with solc and web3

Greeting Wall is a full-stack Web3 dApp where users connect their wallet, submit on-chain greetings, and read the latest messages from blockchain event history.

> personal.newAccount("123") // Создаем новый аккаунт с паролем "123" "0x07ae7ebb7b9c65b51519fc6561b8a78ad921ed13" // Его адрес > eth.accounts // Смотрим список аккаунтов ["0x07ae7ebb7b9c65b51519fc6561b8a78ad921ed13"] > miner.setEtherbase(eth.accounts[0]) // Устанавливаем его в качестве аккаунта для майнинга true > eth.coinbase // Проверяем "0x07ae7ebb7b9c65b51519fc6561b8a78ad921ed13" // Все верно > miner.start() // Я запускаю майнер не в первый раз, поэтому у меня номера блоков 31,32,... true I1005 09:25:44.363901 miner/miner.go:136] Starting mining operation (CPU=2 TOT=3) I1005 09:25:44.364247 miner/worker.go:539] commit new work on block 31 with 0 txs & 0 uncles. Took 291.8µs I1005 09:25:45.049267 miner/worker.go:342] Mined block (#31 / 4ca861c2). Wait 5 blocks for confirmation I1005 09:25:45.049567 miner/worker.go:539] commit new work on block 32 with 0 txs & 0 uncles. Took 133.101µs I1005 09:25:45.049976 miner/worker.go:539] commit new work on block 32 with 0 txs & 0 uncles. Took 121.3µs I1005 09:25:45.632474 miner/worker.go:342] Mined block (#32 / f79f0df7). Wait 5 blocks for confirmation I1005 09:25:45.632796 miner/worker.go:539] commit new work on block 33 with 0 txs & 0 uncles. Took 182.601µs I1005 09:25:45.632915 miner/worker.go:539] commit new work on block 33 with 0 txs & 0 uncles. Took 86.9µs I1005 09:25:46.441888 miner/worker.go:342] Mined block (#33 / 16e99579). Wait 5 blocks for confirmation I1005 09:25:46.442257 miner/worker.go:539] commit new work on block 34 with 0 txs & 0 uncles. Took 268.9µs I1005 09:25:46.442440 miner/worker.go:539] commit new work on block 34 with 0 txs & 0 uncles. Took 120.201µs > miner.stop() true > eth.getBalance(eth.coinbase) // Проверим баланс 15000000000000000000 function checkAllBalances() { var totalBal = 0; for (var acctNum in eth.accounts) { var acct = eth.accounts[acctNum]; var acctBal = web3.fromWei(eth.getBalance(acct), "ether"); totalBal += parseFloat(acctBal); console.log(" eth.accounts[" + acctNum + "]: \t" + acct + " \tbalance: " + acctBal + " ether"); } console.log(" Total balance: " + totalBal + " ether"); }; geth --dev --rpc --rpcaddr "0.0.0.0" --rpcapi "admin,debug,miner,shh,txpool,personal,eth,net,web3" console mist.exe --rpc http://localhost:8545 contract mortal { /*Для адресов есть отдельный тип переменных*/ address owner; /*Данная функция исполняется лишь однажды - при загрузки контракта в блокчейн Называется также как и контракт Переменной owner присвоится значение адреса отправителя контракта, то есть ваш адрес*/ function mortal() { owner = msg.sender; } /*Функция selfdestruct уничтожает контракт и отправляет все средства со счета контракта на адрес, указанный в аргументе*/ /*В Ethereum любой участник сети может вызвать любую функцию Проверка адреса позволит уничтожить контракт только вам*/ function kill() { if (msg.sender == owner) selfdestruct(owner); } } /*Оператор is отвечает за наследование*/ /*Возможно множественное наследование вида contract_1 is contract_2, contract_3*/ contract greeter is mortal { string greeting; /*В этом случае при инициализации контракта нужно будет указать строку-аргумент В нашем случае это и будет "Hello, world!"*/ function greeter(string _greeting) public { greeting = _greeting; } // Эта функция и отвечает за возвращение "Hello, world!" function greet() constant returns (string) { return greeting; } }

Greetings sample using web3 1.0

Web3 Greeting sample project

No description available

A web3.js app for greeting

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