graph LR
A-->B

graph LR
A-->B

geth --datadir data0 --networkid 10 --rpc --rpcaddr 172.17.81.217 --rpcport 8545 --rpcapi "web3,eth" --rpccorsdomain "*" console

    private Web3j conectETHclient() throws IOException {
        //连接方式1：使用infura 提供的客户端
        //Web3j web3j = Web3j.build(new HttpService("https://rinkeby.infura.io/zmd7VgRt9go0x6qlJ2Mk"));// TODO: 2018/4/10 token更改为自己的
        //连接方式2：使用本地客户端
        Web3j web3j = Web3j.build(new HttpService("http://47.93.230.63:8545"));
        //测试是否连接成功
        String web3ClientVersion = web3j.web3ClientVersion().send().getWeb3ClientVersion();
        log.info("version=" + web3ClientVersion);
        return web3j;
    }

    private void creatAccount() throws NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException, CipherException, IOException {
        String walletFileName0 = "";//文件名
        String walletFilePath0 = "C:\\Users\\commando\\AppData\\Roaming\\Ethereum\\testnet\\keystore";
        //钱包文件保持路径，请替换位自己的某文件夹路径

        walletFileName0 = WalletUtils.generateNewWalletFile("123456", new File(walletFilePath0), false);
        //WalletUtils.generateFullNewWalletFile("password1",new File(walleFilePath1));
        //WalletUtils.generateLightNewWalletFile("password2",new F
        // ile(walleFilePath2));
        log.info("walletName: " + walletFileName0);
    }

    private Credentials loadWallet() throws IOException, CipherException {
        String walleFilePath = "C:\\Users\\commando\\AppData\\Roaming\\Ethereum\\testnet\\keystore\\UTC--2018-05-08T02-55-54.711051948Z--22149078fdf7178fd8f0ff89ce6a85d230e583d8.json";
        String passWord = "huangl";
        Credentials credentials = WalletUtils.loadCredentials(passWord, walleFilePath); //debug时间比较长需要几分钟，run时正常
        String address = credentials.getAddress();
        BigInteger publicKey = credentials.getEcKeyPair().getPublicKey();
        BigInteger privateKey = credentials.getEcKeyPair().getPrivateKey();

        log.info("address=" + address);
        log.info("public key=" + publicKey);
        log.info("private key=" + privateKey);
        return credentials;

    }

    private void transferCoin(Web3j web3j, Credentials credentials) throws Exception {
        TransactionReceipt transferReceipt = Transfer.sendFunds(
                web3j, credentials,
                "d14ff35010a22a9472cbc543d36c744a6cb8391d",  // you can put any address here
                BigDecimal.ONE, Convert.Unit.WEI)  // 1 wei = 10^-18 Ether
                .send();
        log.info("Transaction complete, view it at https://rinkeby.etherscan.io/tx/" + transferReceipt.getTransactionHash());
    }

    private void deployContract(Web3j web3j, Credentials credentials) throws Exception {
        log.info("Deploying smart contract");
        Greeter contract = Greeter.deploy(
                web3j, credentials,
                //ManagedTransaction.GAS_PRICE, Contract.GAS_LIMIT,
                ManagedTransaction.GAS_PRICE, new BigInteger("2300000"),
                "Hello blockchain world!").send();

        String contractAddress = contract.getContractAddress();
        log.info("Smart contract deployed to address " + contractAddress);
        log.info("View contract at https://rinkeby.etherscan.io/address/" + contractAddress);
        log.info("Value stored in remote smart contract: " + contract.greet().send());

        // Lets modify the value in our smart contract
        TransactionReceipt transactionReceipt = contract.newGreeting("Well hello again").send();
        log.info("New value stored in remote smart contract: " + contract.greet().send());

        // Events enable us to log specific events happening during the execution of our smart
        // contract to the blockchain. Index events cannot be logged in their entirety.
        // For Strings and arrays, the hash of values is provided, not the original value.
        // For further information, refer to https://docs.web3j.io/filters.html#filters-and-events
        for (Greeter.ModifiedEventResponse event : contract.getModifiedEvents(transactionReceipt)) {
            log.info("Modify event fired, previous value: " + event.oldGreeting
                    + ", new value: " + event.newGreeting);
            log.info("Indexed event previous value: " + Numeric.toHexString(event.oldGreetingIdx)
                    + ", new value: " + Numeric.toHexString(event.newGreetingIdx));
        }
    }