genesis.json:
{
"config": {
"chainId": 666,
"homesteadBlock": 0,
"eip150Block": 0,
"eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"eip155Block": 0,
"eip158Block": 0,
"byzantiumBlock": 0,
"constantinopleBlock": 0,
"petersburgBlock": 0,
"istanbulBlock": 0,
"ethash": {}
},
"nonce": "0x0",
"timestamp": "0x5ddf8f3e",
"extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
"gasLimit": "0xffffffff",
"difficulty": "0x20000",
"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"coinbase": "0x0000000000000000000000000000000000000000",
"alloc": {},
"number": "0x0",
"gasUsed": "0x0",
"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
}初始化区块链：
geth1 --identity "MyEth" --rpc --rpcaddr 127.0.0.1 --rpcport "8545" --rpccorsdomain "*" --datadir gethdata --port "30303" --nodiscover --rpcapi "eth,net,personal,web3" --networkid 91036 init genesis.json启动区块链：
geth1 --datadir ./gethdata --networkid 91036 --port 30303 --rpc --rpcaddr 127.0.0.1 --rpcport 8545 --rpcapi 'personal,net,eth,web3,admin' --rpccorsdomain='*' --ws --wsaddr='localhost' --wsport 8546 --wsorigins='*' --wsapi 'personal,net,eth,web3,admin' --nodiscover --allow-insecure-unlock --dev.period 1 --syncmode='full' console创建账户：
for (i = 0; i < 8; i++) { personal.newAccount("123456") }解锁账户：
for (i = 0; i < eth.accounts.length; i++) { personal.unlockAccount(eth.accounts[i],"123456",0) }新建TaxiSystem文件夹，将00节中的genesis.json内容放置入根目录。在TaxiSystem文件夹下启动终端，分别使用初始化区块链、启动区块链的指令操作，打开JavaScript控制台。
在控制台中，执行00节中的创建账户和解锁账户指令后，利用eth.accounts获取所有账户的地址，使用如下Python程序，生成即将添加进入genesis.json的代码：
# TaxiSystem/accounts_processor.py
l = eth.accounts的输出，原样粘贴过来即可，应该是["...", "...", ...]的格式
for each in l:
print(
f'"{each}": {{ "balance": "50000000000000000000000000000000000000000", "position": "test0123456789", "txtime": 1 }},'
)记录该程序的输入，直接粘贴到genesis.json的alloc字段中去。
该程序的输出的最后一行带有一个多余的逗号，粘贴到
genesis.json中去之后请务必删除。
在打开的控制台中输入exit退出控制台，然后删除目录TaxiSystem/gethdata/geth。随后，再运行一次初始化区块链和启动区块链的代码。此时，所有账户应该都有余额了。可以用eth.geBalance(账户地址)来检查余额：
for (i = 0; i < eth.accounts.length; i++) { console.log(eth.getBalance(eth.accounts[i])) }每次重新启动JS控制台，都需要再解锁一次账户。
首先是StoreMap.sol合约。该合约的Solidity源代码位于仓库的CompileWithTruffle/contracts/StoreMap.sol。使用《9 关于使用truffle编译solidity源代码》中介绍的方法获得abi和bytecode之后，打开这个用于JSON压缩转义的网站，将获得的abi（形如"abi": [...]）丢进去，点击输入框下方的“压缩并转义”，复制走从第一个[开始之后的全部内容。
在打开的控制台中输入如下指令：
abi = JSON.parse("复制来的内容")
bytecode = 获得的bytecode，字符串类型
StoreMapContract = web3.eth.contract(abi);
web3.eth.estimateGas({data: bytecode})
StoreMap = StoreMapContract.new({
from: web3.eth.accounts[0],
data: bytecode,
gas: '3000000',
position:"w2511111111111",
txtime:277001
},function (e, contract){
console.log(e, contract);
if(!e){
if(!contract.address) {
console.log("Contract transaction send: TransactionHash: " + contract.transactionHash + " waiting to be mined...");
} else {
console.log("Contract mined! Address: " + contract.address);
console.log(contract);
}
}
});开始挖矿，并留意输出：
miner.start()
/*
-- snip --
null [object Object]
Contract mined! Address: 0xef00ade84bb560afe4b562bfd4a81300c17ac52f
[object Object]
-- snip --
*/
miner.stop() // 停止挖矿以节省电脑性能这就是StoreMap合约的地址了。妥善保存，以供日后使用。
该合约的部署较为简单，直接将多节点树状区块链部署中的有关StoreTraffic的一片代码全丢进控制台中然后按一下Enter键即可，其内容如下：
abi = JSON.parse('[{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"passengerGeohash\",\"type\":\"bytes32\"}],\"name\":\"Myevent\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"}],\"name\":\"boardEvent\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"}],\"name\":\"payEvent\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"}],\"name\":\"rejectEvent\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"}],\"name\":\"routeEvent\",\"type\":\"event\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"newPrecision\",\"type\":\"uint256\"}],\"name\":\"changePrecision\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"}],\"name\":\"confirmBoard\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"}],\"name\":\"confirmPay\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"}],\"name\":\"deleteVehicle\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"string\",\"name\":\"geohash\",\"type\":\"string\"}],\"name\":\"getLatBlock\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"string\",\"name\":\"geohash\",\"type\":\"string\"}],\"name\":\"getLonBlock\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"}],\"name\":\"getPassengerEnd\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"end\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"}],\"name\":\"getPassengerPos\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"position\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"}],\"name\":\"getRoutes\",\"outputs\":[{\"internalType\":\"bytes32[]\",\"name\":\"route\",\"type\":\"bytes32[]\"},{\"internalType\":\"uint256\",\"name\":\"cost\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"passengerGeohash\",\"type\":\"bytes32\"}],\"name\":\"getVehicle\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"passengerGeohash\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32[]\",\"name\":\"regionVehicles\",\"type\":\"bytes32[]\"}],\"name\":\"getVehicleByRegion\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"}],\"name\":\"getVehicleStatus\",\"outputs\":[{\"internalType\":\"int32\",\"name\":\"\",\"type\":\"int32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"geohash\",\"type\":\"bytes32\"}],\"name\":\"initPassenger\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"geohash\",\"type\":\"bytes32\"}],\"name\":\"initVehicle\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"nextGeohash\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"endGeohash\",\"type\":\"bytes32\"}],\"name\":\"manhattan\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"startGeohash\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"endGeohash\",\"type\":\"bytes32\"}],\"name\":\"setPassengerDemand\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"passengerGeohash\",\"type\":\"bytes32\"}],\"name\":\"setPassengerPosition\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"}],\"name\":\"setRejectVehicleStatus\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"vehicleGeohash\",\"type\":\"bytes32\"}],\"name\":\"setVehicle\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"passengerGeohash\",\"type\":\"bytes32\"}],\"name\":\"setVehicleStatus\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"}],\"name\":\"setVehicleStatusEmpty\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"geohash1\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"geohash2\",\"type\":\"bytes32\"}],\"name\":\"sliceGeoHash\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"},{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"cost\",\"type\":\"uint256\"},{\"internalType\":\"bytes32\",\"name\":\"vehicleId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"passengerId\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32[]\",\"name\":\"route\",\"type\":\"bytes32[]\"}],\"name\":\"storeRoutes\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]')
bytecode = 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trafficContract = web3.eth.contract(abi);
web3.eth.estimateGas({data: bytecode})
traffic = trafficContract.new({
from: web3.eth.accounts[0],
data: bytecode,
gas: '4000000',
position:"w2511111111111",
txtime:277001
},function (e, contract){
console.log(e, contract);
if(!e){
if(!contract.address) {
console.log("Contract transaction send: TransactionHash: " + contract.transactionHash + " waiting to be mined...");
} else {
console.log("Contract mined! Address: " + contract.address);
console.log(contract);
}
}
});同样开始挖矿并留意输出：
miner.start()
/*
-- snip --
null [object Object]
Contract mined! Address: 0xf03dafc4fadae50b1b7bc0f602ae722038f7fe51
[object Object]
-- snip --
*/
miner.stop() // 停止挖矿以节省电脑性能这就是StoreTraffic合约的地址了。妥善保存，以供日后使用。
在仓库的investigation-cjzhuang2020/cjz_underg_2021_09/tree_blockchain路径下找到uploadmap_cjz_3.json文件，打开并修改一下其中的内容：
// -- snip --
// contract address
var myContractInstance = MyContract.at("StoreMap合约的地址");
var account = "eth.accounts[0]的内容";
// -- snip --！不明晰点！后续的步骤中出现错误（浏览器中console打印的roads数组的元素中path数组为空），怀疑是上传地图有问题。
解决方法：investigation-cjzhuang2020/cjz_underg_2021_09/tree_blockchain/build下有一个StoreMap.json，换成我们使用Truffle编译获得的json即可。
令区块链开始挖矿之后，使用node运行一下这个脚本。终端中不断输出，直至出现“地图数据上传完成”字样。停止挖矿。
目前，我们已经创建了8个账户（详见00节中的“创建账户”指令）。接下来，我们修改一些文件的内容，让这8个账户中的其中一个作为车辆的账户，一个作为乘客的账户。后续的自动化测试脚本，将会调用我们在本节修改的文件。
在仓库的investigation-cjzhuang2020/cjz_underg_2021_09路径下，找到如下文件并修改之：
将其改为：
passengers = ["eth.accounts[0]的内容"]将其改为：
vehicles = ["eth.accounts[1]的内容"]将其改为：
var mapContractAddress = "StoreMap合约的地址";
// --snip--将其改为：
var trafficContractAddress = "StoreTraffic合约的地址";将其改为：
let passengers = [
{
passengerId: "eth.accounts[0]的内容",
passengerPosition: "wx4er3tvs9s",
passengerStart: "wx4er2juseu",
passengerEnd: "wx4g200hxgf",
}
// {
// passengerId: "0xbae4e5086ea1c75d20e9771de4b4252af4adc406",
// passengerPosition: "wx4er2juseu",
// passengerStart: "wx4epqtgstu",
// passengerEnd: "wx4g0n85xvf",
// },
// {
// passengerId: "0xecfc0932a92863f7c6444fb3aaff69856a189b59",
// passengerPosition: "wx4epqtgstu",
// passengerStart: "wx4epmjfu8h",
// passengerEnd: "wx4g0j04zb4",
// },
// {
// passengerId: "0xd382727be67e57fe18e0401fcf39686b5063ed55",
// passengerPosition: "wx4epmjfu8h",
// passengerStart: "wx4ep7tcudh",
// passengerEnd: "wx4g0581zf4",
// },
]将其改为：
let vehicles = [
{ "vehicleId": "eth.accounts[1]的内容", "vehiclePosition": "wx4enge9c6j" }
// { "vehicleId": "0x7c1e3c84f6eb6736181eb3edd7e8685ff960fe35", "vehiclePosition": "wx4env5dc2j" },
// { "vehicleId": "0xf0efa2e97b9caf2155a973b30d11a36893e8988d", "vehiclePosition": "wx4enyee9mv" },
// { "vehicleId": "0x471882a68b4fcce65aa8a12e77b6934adbe89aed", "vehiclePosition": "wx4eqb5s97v" }
]在《7 调度系统复现》文档中，我们发现了自动测试脚本中的错误并予以更正。为使所有跳过了《7 调度系统复现》文档的读者能够顺利进行实验，笔者将再复述一次修正错误的方法：
报错：selenium没有叫做find_element_by_id的属性。
解决方法：将所有find_element_by_id(...)替换为find_element(by=By.id, value=...)。另外，也将所有find_element_by_class_name(...)换成find_element(by=By.CLASS_NAME, value=...)。
遇到这个错误：selenium.common.exceptions.TimeoutException。很明显，是由于网页没有按照期望的方式运行，导致wait_until超时，进而引发了该错误。
检查vehicle_test.py所打开的前端页面sys_vehicle_region.html，发现其WeSocket连接的端口是8548，并非我们使用的8546（这是因为01节中给出的node = childProcess.exec(...)中给出的代码中，有一个--wsport 8546参数）。将其改为：
// ...
const PORT = 8546;
// ...
web3Map = new Web3(new Web3.providers.WebsocketProvider(`ws://127.0.0.1:${PORT}`));
web3Traffic = new Web3(new Web3.providers.WebsocketProvider(`ws://127.0.0.1:${PORT}`));全部更改完毕之后，启动挖矿，准备启动车辆客户端和乘客端的测试脚本。
在investigation-cjzhuang2020/cjz_underg_2021_09中启动终端，执行：
python3 vehicle_test.py！不明晰点！打开了Googe Chrome，但地图还是全白，且控制台中输出的roads数组的元素中，path还是空的。。。
解决方法：详见03节上传地图一章！
看到如下提示，说明车辆位置上传成功：
接下来启动乘客测试脚本：
python3 passenger_test.py被selenium控制的浏览器会进行一系列的操作，当司机端询问：Whether to pick up the passenger时，点按下图的pickUp按钮接起乘客，即可完成后续的调度步骤：
最终，乘客被送达目的地，并在支付订单之后乘客端的测试程序结束运行：
本次实验圆满结束。至此，全部复现实验已经完成。