以太坊钱包项目中 Geth 的启用 DEMO
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本文目录结构
DEMO 代码如下
省略了 geth 的比较等之类的校验；
核心代码如下；
const Manager = require('ethereum-client-binaries').Manager;
const config = require('./clientBinaries.json');
const mgr = new Manager(config);
const { spawn, spawnSync } = require('child_process');
var op = require('openport');
let home;
if(process.env.APPDATA) {
home = process.env.APPDATA + '/MedRec';
}else {
home = process.env.HOME;
home += process.platform == 'darwin' ? '/Library/Preferences' : '/.medrec';
}
let runGeth = (binaryPath) => {
op.find(
{
startingPort: 6338,
endingPort: 10000,
},
function (err, port) {
if(err) {
console.error('Could not find open port for the Ethereum client');
process.exit(1);
}
let bootnode = 'enode://757b0f2c9e2bede3a2554985880fae15bdf6ce90b375ec9cb025a397499b75f7994ee05edbdaddaf469edb72198220f2a32c216925ca50a5626f497de889d652@34.239.63.141:6338';
let instance = spawn(binaryPath, [
'--datadir=' + home,
'--bootnodes=' + bootnode,
'--rpc',
'--rpcapi=eth,miner,personal,net,web3',
'--rpccorsdomain=*', //TODO: fix this security vulnerability and specify exact domains
'--port=' + port, '--networkid=633732',
'--targetgaslimit=10000000000000',
]);
instance.stderr.on('data', (data) => {
process.stdout.write(`Ethereum: ${data}`);
});
}
);
};
let initGeth = (binaryPath) => {
spawnSync(binaryPath, ['--datadir', home, 'init', 'EthereumClient/medrec-genesis.json']);
runGeth(binaryPath);
};
mgr.init({
folders: [
home + '/Geth/',
],
})
.then(() => {
if(mgr.clients.Geth.state.available) {
initGeth(mgr.clients.Geth.activeCli.fullPath);
}else {
mgr.download('Geth', {
downloadFolder: home,
}).then(file => initGeth(file.unpackFolder + '/geth'));
}
})
.catch(err => {
console.log(err);
process.exit(1);
});
