Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之二《创建Channel》
本文已在我的公众号Fabric技术分享原创首发。
转载请标明出处：
https://blog.csdn.net/qq_27818541/article/details/78326736
本文出自:【BigManing的博客】
前言
这里面有两个重要的参数：
- channel名称
- channel配置文件路径（../artifacts/channel/mychannel.tx）
这个mychannel.tx是要事先生成好的文件。了解更多channel配置文件相关内容看这里。
路由
app.js
app.post('/channels', function(req, res) {
logger.info('<<<<<<<<<<<<<<<<< C R E A T E C H A N N E L >>>>>>>>>>>>>>>>>');
logger.debug('End point : /channels');
// 1 校验参数
var channelName = req.body.channelName;
var channelConfigPath = req.body.channelConfigPath;
logger.debug('Channel name : ' + channelName);
logger.debug('channelConfigPath : ' + channelConfigPath); //../artifacts/channel/mychannel.tx
if (!channelName) { // 参数一： channel名称
res.json(getErrorMessage('\'channelName\''));
return;
}
if (!channelConfigPath) { // 参数二： channel配置文件路径
res.json(getErrorMessage('\'channelConfigPath\''));
return;
}
// 2 创建通道
channels.createChannel(channelName, channelConfigPath, req.username, req.orgname)
.then(function(message) {
res.send(message);
});
});具体实现
create-channel.js
var createChannel = function(channelName, channelConfigPath, username, orgName) {
logger.debug('\n====== Creating Channel \'' + channelName + '\' ======\n');
var client = helper.getClientForOrg(orgName);
var channel = helper.getChannelForOrg(orgName);
//1 读取channel配置 read in the envelope for the channel config raw bytes
var envelope = fs.readFileSync(path.join(__dirname, channelConfigPath));
// 提取配置信息 extract the channel config bytes from the envelope to be signed
var channelConfig = client.extractChannelConfig(envelope);
//2 在admin环境下 来初始化这个channel Acting as a client in the given organization provided with "orgName" param
return helper.getOrgAdmin(orgName).then((admin) => {
logger.debug(util.format('Successfully acquired admin user for the organization "%s"', orgName));
// sign the channel config bytes as "endorsement", this is required by
// the orderer's channel creation policy
//3 签名channel order要求 要创建（更新）的channel 必须要admin签名
let signature = client.signChannelConfig(channelConfig);
let request = {
// byte[]
config: channelConfig,
// admin 签名后的数据
signatures: [signature],
name: channelName,
// 这个channel 中的order对象
orderer: channel.getOrderers()[0],
txId: client.newTransactionID() // 交易id
};
//4 通过client创建channel 里面 send to orderer 通过order来广播事务
return client.createChannel(request);
}, (err) => {
logger.error('Failed to enroll user \''+username+'\'. Error: ' + err);
throw new Error('Failed to enroll user \''+username+'\'' + err);
}).then((response) => {
logger.debug(' response ::%j', response);
//5 处理响应结果
if (response && response.status === 'SUCCESS') {
logger.debug('Successfully created the channel.');
let response = {
success: true,
message: 'Channel \'' + channelName + '\' created Successfully'
};
return response;
} else {
logger.error('\n!!!!!!!!! Failed to create the channel \'' + channelName +
'\' !!!!!!!!!\n\n');
throw new Error('Failed to create the channel \'' + channelName + '\'');
}
}, (err) => {
logger.error('Failed to initialize the channel: ' + err.stack ? err.stack :
err);
throw new Error('Failed to initialize the channel: ' + err.stack ? err.stack : err);
});
};API访问
定义好两个参数channelName以及channelConfigPath ，输入shell命令：
echo "POST request Create channel ..."
echo
curl -s -X POST \
http://localhost:4000/channels \
-H "authorization: Bearer $ORG1_TOKEN" \
-H "content-type: application/json" \
-d '{
"channelName":"mychannel",
"channelConfigPath":"../artifacts/channel/mychannel.tx"
}'
echo$ORG1_TOKEN就是注册用户时返回的token。运行结果：
POST request Create channel ...
{"success":true,"message":"Channel 'mychannel' created Successfully"}
node服务后台打印：
[2017-10-16 11:07:06.446] [DEBUG] SampleWebApp - Decoded from JWT token: username - Jim, orgname - org1
[2017-10-16 11:07:06.446] [INFO] SampleWebApp - <<<<<<<<<<<<<<<<< C R E A T E C H A N N E L >>>>>>>>>>>>>>>>>
[2017-10-16 11:07:06.446] [DEBUG] SampleWebApp - End point : /channels
[2017-10-16 11:07:06.446] [DEBUG] SampleWebApp - Channel name : mychannel
[2017-10-16 11:07:06.446] [DEBUG] SampleWebApp - channelConfigPath : ../artifacts/channel/mychannel.tx
[2017-10-16 11:07:06.447] [DEBUG] Create-Channel -
====== Creating Channel 'mychannel' ======
[2017-10-16 11:07:06.450] [DEBUG] Helper - [crypto_ecdsa_aes]: constructor, keySize: 256
[2017-10-16 11:07:06.451] [DEBUG] Helper - [crypto_ecdsa_aes]: Hash algorithm: SHA2, hash output size: 256
[2017-10-16 11:07:06.459] [DEBUG] Helper - [utils.CryptoKeyStore]: CryptoKeyStore, constructor - start
[2017-10-16 11:07:06.459] [DEBUG] Helper - [utils.CryptoKeyStore]: constructor, no super class specified, using config: fabric-client/lib/impl/FileKeyValueStore.js
[2017-10-16 11:07:06.459] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore.js - constructor
[2017-10-16 11:07:06.460] [DEBUG] Helper - Msp ID : Org1MSP
[2017-10-16 11:07:06.460] [DEBUG] Helper - [crypto_ecdsa_aes]: importKey - start
[2017-10-16 11:07:06.462] [DEBUG] Helper - [crypto_ecdsa_aes]: importKey - have the key [Circular]
[2017-10-16 11:07:06.462] [DEBUG] Helper - [utils.CryptoKeyStore]: This class requires a CryptoKeyStore to save keys, using the store: {"opts":{"path":"/tmp/fabric-client-kvs_peerOrg1"}}
[2017-10-16 11:07:06.462] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore.js - constructor
[2017-10-16 11:07:06.463] [DEBUG] Helper - [utils.CryptoKeyStore]: _getKeyStore returning ks
[2017-10-16 11:07:06.463] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: 0a66f3503a3322b2ca8e9dce03322d486ee6ec5970efaad3f153bc13aa2d942c
[2017-10-16 11:07:06.463] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: 312ad05190fa592fb9e8ac2dcdb23c84df7f49e4ee295c2aa1200a50c9146c46
[2017-10-16 11:07:06.463] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore -- setValue
[2017-10-16 11:07:06.464] [DEBUG] Helper - [crypto_ecdsa_aes]: importKey - start
[2017-10-16 11:07:06.464] [DEBUG] Helper - [crypto_ecdsa_aes]: importKey - have the key [Circular]
[2017-10-16 11:07:06.465] [DEBUG] Helper - [utils.CryptoKeyStore]: _getKeyStore resolving store
[2017-10-16 11:07:06.465] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: 0a66f3503a3322b2ca8e9dce03322d486ee6ec5970efaad3f153bc13aa2d942c
[2017-10-16 11:07:06.465] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: 312ad05190fa592fb9e8ac2dcdb23c84df7f49e4ee295c2aa1200a50c9146c46
[2017-10-16 11:07:06.465] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore -- setValue
[2017-10-16 11:07:06.467] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: 0a66f3503a3322b2ca8e9dce03322d486ee6ec5970efaad3f153bc13aa2d942c
[2017-10-16 11:07:06.468] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: 312ad05190fa592fb9e8ac2dcdb23c84df7f49e4ee295c2aa1200a50c9146c46
[2017-10-16 11:07:06.468] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: 0a66f3503a3322b2ca8e9dce03322d486ee6ec5970efaad3f153bc13aa2d942c
[2017-10-16 11:07:06.469] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: 312ad05190fa592fb9e8ac2dcdb23c84df7f49e4ee295c2aa1200a50c9146c46
[2017-10-16 11:07:06.469] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: 0a66f3503a3322b2ca8e9dce03322d486ee6ec5970efaad3f153bc13aa2d942c
[2017-10-16 11:07:06.469] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: 312ad05190fa592fb9e8ac2dcdb23c84df7f49e4ee295c2aa1200a50c9146c46
[2017-10-16 11:07:06.469] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore -- setValue
[2017-10-16 11:07:06.470] [DEBUG] Create-Channel - Successfully acquired admin user for the organization "org1"
[2017-10-16 11:07:06.481] [DEBUG] Helper - [crypto_ecdsa_aes]: ecdsa signature: Signature {
r: 69008cc4396fed179cc6b9876d94a1c7e95ad3ed023ddbcece4a574788e88419>,
s: 56e1d31c5585f4d939dab9434a2fdb33c9e2afcf4eaac55200f07f9b8b72bfed>,
recoveryParam: 0 }
[2017-10-16 11:07:06.490] [DEBUG] Helper - [crypto_ecdsa_aes]: ecdsa signature: Signature {
r: 78af3c9f44a0ecb540b942600949b081480eec07e230b7ebaa0e61218e215807>,
s: 1ce9943f4853cd41add3f184a570dc3ea52335f8e23704fee3c804277fbfcbf9>,
recoveryParam: 0 }
// 创建成功
[2017-10-16 11:07:06.561] [DEBUG] Create-Channel - response ::{"status":"SUCCESS"}
[2017-10-16 11:07:06.561] [DEBUG] Create-Channel - Successfully created the channel.