利用Geth和Web3.js陈设您的第一个私有以太坊智能合约

“contracts”: {
Version: 0.7.1+commit.f4a555be.Linux.g++
true <– make sure you are mining or miner.start(1)
name: “owner”,
getOwner: function(),

}
> ownerContractInstance.setOwner(eth.accounts[1], { from: eth.accounts[0] })
}
coinbase: 0x6be8a6cad397746efc5033e27e82477e27c9afec
Starts the test runner.yarn eject

然后，您想将一个菜单选项下移到Solidity Compiler。只需单击蓝色的Compile Owner.sol按钮。

“0xb2c455aa1ac281180b4faca7b8896092169ccd55”
blockHash: “0x94a0e3c9c9d562c34061147e1ef21f9260178693df124ff81cba37f1818fa8a7”,
> var deployedBinary = eth.getCode(ownerContractAddress)
“string”
transactionHash: “0x38391d46e37e79b7764df2ba31cc32ff45457e2a33a5826b8af15fce9a0e5cf2”,
}],

我展开了合约，您可以从哪里看到合约中的两种要领。带输入字段的“ getter” getOwner和“ setter” changeOwner。我单击getOwner按钮并看到陈设的地点：0x5B38Da6a701c568545dCfcB03FcB875f56beddC4

Unlock account 0x6be8a6cad397746efc5033e27e82477e27c9afec
{“contracts”:{“Owner.sol:Owner”:{“abi”:”[{“inputs”:[],”stateMutability”:”nonpayable”,”type”:”constructor”},{“anonymous”:false,”inputs”:[{“indexed”:true,”internalType”:”address”,”name”:”oldOwner”,”type”:”address”},{“indexed”:true,”internalType”:”address”,”name”:”newOwner”,”type”:”address”}],”name”:”OwnerSet”,”type”:”event”},{“inputs”:[{“internalType”:”address”,”name”:”newOwner”,”type”:”address”}],”name”:”changeOwner”,”outputs”:[],”stateMutability”:”nonpayable”,”type”:”function”},{“inputs”:[],”name”:”getOwner”,”outputs”:[{“internalType”:”address”,”name”:””,”type”:”address”}],”stateMutability”:”view”,”type”:”function”},{“inputs”:[],”name”:”owner”,”outputs”:[{“internalType”:”address”,”name”:””,”type”:”address”}],”stateMutability”:”view”,”type”:”function”}]”,”bin”:”608060405234801561001057600080fd5b5060008054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff16600073ffffffffffffffffffffffffffffffffffffffff167f342827c97908e5e2f71151c08502a66d44b6f758e3ac2f1de95f02eb95f0a73560405160405180910390a3336000806101000a81548173ffffffffffffffffffffffffffffffffffffffff021916908373ffffffffffffffffffffffffffffffffffffffff1602179055506102f3806100db6000396000f3fe608060405234801561001057600080fd5b50600436106100415760003560e01c8063893d20e8146100465780638da5cb5b1461007a578063a6f9dae1146100ae575b600080fd5b61004e6100f2565b604051808273ffffffffffffffffffffffffffffffffffffffff16815260200191505060405180910390f35b61008261011b565b604051808273ffffffffffffffffffffffffffffffffffffffff16815260200191505060405180910390f35b6100f0600480360360208110156100c457600080fd5b81019080803573ffffffffffffffffffffffffffffffffffffffff16906020019092919050505061013f565b005b60008060009054906101000a900473ffffffffffffffffffffffffffffffffffffffff16905090565b60008054906101000a900473ffffffffffffffffffffffffffffffffffffffff1681565b60008054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff163373ffffffffffffffffffffffffffffffffffffffff1614610200576040517f08c379a00000000000000000000000000000000000000000000000000000000081526004018080602001828103825260138152602001807f43616c6c6572206973206e6f74206f776e65720000000000000000000000000081525060200191505060405180910390fd5b8073ffffffffffffffffffffffffffffffffffffffff1660008054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff167f342827c97908e5e2f71151c08502a66d44b6f758e3ac2f1de95f02eb95f0a73560405160405180910390a3806000806101000a81548173ffffffffffffffffffffffffffffffffffffffff021916908373ffffffffffffffffffffffffffffffffffffffff1602179055505056fea2646970667358221220ba9a494e8dd99908b8c962ed752cac0bf679199c5c8dad87d13f5f9d9088c39c64736f6c63430007010033″}},”version”:”0.7.1+commit.f4a555be.Linux.g++”}
> var deployTransactionObject = { from: eth.coinbase, data: “0x” + ownerContractCompiled.contracts[“Owner.sol:Owner”].bin, gas: 1000000 }
任何人都可以检索合约二进制文件。
Warning: SPDX license identifier not provided in source file. Before publishing, consider adding a comment containing “SPDX-License-Identifier: <SPDX-License>” to each source file. Use “SPDX-License-Identifier: UNLICENSED” for non-open-source code. Please see https://spdx.org for more information.
}, {
apt-get install jq -y
blockNumber: 4061,
name: “getOwner”,
type: “function”
owner: function()
inputs: [],

}],
address: “0xb2c455aa1ac281180b4faca7b8896092169ccd55”,

单击橙色Deploy后，您将看到陈设在deployed Contracts下的合约。你也会留意到它有本身的以太坊地点。

–> Owner.sol
gasUsed: 287352,
anonymous: false,
type: “function”
> eth.getTransactionReceipt(ownerContractInstance.transactionHash);
transactionIndex: 0
在本教程中，我将利用Remix的示例合约之一（Owner.sol）。在较高级别上，此合约会将合约的所有者配置为陈设它的人。有一个“ getter”可以检索当前所有者是谁，尚有一个“ setter”可以答允当前所有者配置另一个所有者。很是简朴，但可以到达目标。
blockHash: “0x94a0e3c9c9d562c34061147e1ef21f9260178693df124ff81cba37f1818fa8a7”,
contract Owner {
removed: false,
Passphrase:
}

智能合约根基上是利用中的以太坊虚拟机（EVM）运行的措施。建设以太坊地点时，会分派一个以太坊地点，而且每个交互利用一个事务。合约/应用措施将在区块链中具有状态，而且与之交互时状态将产生变革。重要的是，一旦合约被发送到区块链，它就永远不会改变（它是不行变的）。您可以通过变动再次上载同一个合约，但前一个合约将保持稳定，而且它们将在互相不知情的环境下并行运行。在智能合约进入主网之前，质量担保和测试至关重要。
> var ownerContract = eth.contract(JSON.parse(ownerContractCompiled.contracts[“Owner.sol:Owner”].abi))
inputs: [{…}, {…}],
> personal.unlockAccount(eth.coinbase)
}
> eth.coinbase
require(msg.sender == owner, “Caller is not owner”);
outputs: [],
该库可用于Node.js和React.js。您可以像这样与 Geth节点RPC举办交互。
transactionHash: “0x38391d46e37e79b7764df2ba31cc32ff45457e2a33a5826b8af15fce9a0e5cf2”,

此刻将鼠标移到Deploy&runtransactions菜单。只需单击橙色Deploy按钮。

abi: [{
stateMutability: “view”,
inputs: [],
利用一些示例合约从头Remix加载。我们正在利用的一个在上面称为Owner.sol。我删除了本教程中包括的注释。我将表明如何与之互动。

data: “0x”,
~/dapp# cat Owner.json
此刻您大概会碰着的一个问题是，Remix中的默认Owner.sol合约利用的编译器≥0.4.22而且<0.7.0。我的Ubuntu系统上安装的solc编译器是0.7.1
logIndex: 0,
inputs: [{…}],
~/geth# ./2020-attach.sh
type: “constructor”

我想改变合约的所有者。在顶部，我移动到第二个帐户，以便可以或许复制它，然后移回第一个帐户，即所有者。

}
event OwnerSet(address indexed oldOwner, address indexed newOwner);
type: “event”
0 <– this means the contract is the same as the contract deployed

}
合约已陈设并正常事情。您将不但愿一遍又一各处陈设合约以与之集成。这就是您与现有合约举办交互的方法。
to: null,
changeOwner: function(),
from: “0x6be8a6cad397746efc5033e27e82477e27c9afec”,

此刻从0x5B3帐户运行changeOwner要领，将新帐户配置为0xAb8帐户。

凭听说明，假如您将目次变动为“ mediumtutorial”和“ yarn start”，它将打开您的默认欣赏器，您应该会看到。
3983
此刻，对付下一部门，，您将需要一个以太坊Geth节点来安装智能合约。
> var ownerContractAddress = eth.getTransactionReceipt(ownerContractInstance.transactionHash).contractAddress
let web3 = new Web3(‘ws://localhost:8546’);

> typeof ownerContractCompiled.contracts[“Owner.sol:Owner”].abi
root: “0xb37e7b1b1e55b358585677fe3cad149e859540f8981c0d9c57d8adc5af536c20”,
contract Owner {
solc, the solidity compiler commandline interface
{
> eth.mining
outputs: [{…}],
constructor() public {
modules: admin:1.0 debug:1.0 eth:1.0 ethash:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0
> eth.blockNumber
如何建设以太坊智能合约？
emit OwnerSet(address(0), owner);
}
outputs: [{…}],
“Owner.sol:Owner”: {
return owner;
“abi”: “[{“inputs”:[],”stateMutability”:”nonpayable”,”type”:”constructor”},{“anonymous”:false,”inputs”:[{“indexed”:true,”internalType”:”address”,”name”:”oldOwner”,”type”:”address”},{“indexed”:true,”internalType”:”address”,”name”:”newOwner”,”type”:”address”}],”name”:”OwnerSet”,”type”:”event”},{“inputs”:[{“internalType”:”address”,”name”:”newOwner”,”type”:”address”}],”name”:”changeOwner”,”outputs”:[],”stateMutability”:”nonpayable”,”type”:”function”},{“inputs”:[],”name”:”getOwner”,”outputs”:[{“internalType”:”address”,”name”:””,”type”:”address”}],”stateMutability”:”view”,”type”:”function”},{“inputs”:[],”name”:”owner”,”outputs”:[{“internalType”:”address”,”name”:””,”type”:”address”}],”stateMutability”:”view”,”type”:”function”}]”,
}, {
~/dapp# solc –combined-json abi,bin Owner.sol > Owner.json
return owner;

因此这只是Remix的1分钟先容。我发起您本身实验一下。实验将changeOwner配置为无效地点，可能实验使changeOwner不作为所有者，然后看看会产生什么。
> var ownerContractInstance = ownerContract.at(ownerContractAddress)
> ownerContractInstance
function changeOwner(address newOwner) public isOwner {
modifier isOwner() {
function getOwner() external view returns (address) {
_;
mediumtutorial % yarn add web3
{
pragma solidity >=0.4.22 <0.7.0;
address: “0xb2c455aa1ac281180b4faca7b8896092169ccd55”,
}
请留意，合约已陈设，我们的两种要领都在这里。
_;
> (“0x” + ownerContractCompiled.contracts[“Owner.sol:Owner”].bin.substring(2 + ownerContractCompiled.contracts[“Owner.sol:Owner”].bin.length – deployedBinary.length)).localeCompare(deployedBinary);
},
因此，让我们开始建设一个很是根基的React.js应用措施。我将利用“ create-react-app”东西建设默认应用措施。
yarn startHappy hacking!
emit OwnerSet(address(0), owner);
# solc –version
at block: 3981 (Tue Sep 22 2020 22:44:03 GMT+0100 (BST))

我们将从文件欣赏器开始在左侧菜单中举办操纵。您只需在这里选择Owner.sol。

stateMutability: “nonpayable”,
apt-get install solc
transactionHash: “0x38391d46e37e79b7764df2ba31cc32ff45457e2a33a5826b8af15fce9a0e5cf2”,
function changeOwner(address newOwner) public isOwner {
}
function getOwner() external view returns (address) {

请留意，Remix提供了几个可利用的资金帐户。每个账户有100以太币资金。)我将利用从0x5B3开始的第一个帐户来陈设合约。

}
% create-react-app mediumtutorialCreating a new React app in /Repos/React/mediumtutorial.*** INSTALL PROCESS ***Success! Created mediumtutorial at /Repos/React/mediumtutorialInside that directory, you can run several commands:yarn start
type: “function”
{
}
modifier isOwner() {
> var ownerContractInstance = ownerContract.new(deployTransactionObject)
> ownerContractInstance.getOwner()
emit OwnerSet(owner, newOwner);
Welcome to the Geth JavaScript console!
}

> ownerContractAddress
address public owner;

对付0.7.1中的合约，语法略有差异。请在下面利用我变动后的Owner.sol。您还可以将Remix中的编译器版本变动为0.7.1，并也利用此合约。
Bundles the app into static files for production.yarn test
要陈设合约，请执行以下操纵。
address private owner;
此刻你可以在这里提供合约地点。我们正在利用一个变量，但您也可以提供实际地点。请留意以前利用的“.at”而不是“.new”。这意味着您但愿检索现有合约，而不是建设新合约。
owner = msg.sender;
datadir: /root/.ethereum/net2020
}, {

快速Remix先容
inputs: [],
pragma solidity >=0.4.22 <0.8.0;
require(msg.sender == owner, “Caller is not owner”);
transactionIndex: 0
cumulativeGasUsed: 287352,

此刻我再次运行getOwner要领，并正确地将所有者变动为0xAb8483F64d9C6d1EcF9b849Ae677dD3315835cb2

owner = newOwner;
topics: [“0x342827c97908e5e2f71151c08502a66d44b6f758e3ac2f1de95f02eb95f0a735”, “0x0000000000000000000000000000000000000000000000000000000000000000”, “0x0000000000000000000000000000000000000000000000000000000000000000”],

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利用Geth和Web3.js陈设您的第一个私有以太坊智能合约

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