# Hyperledger Fabric 筆記

* **Fabric document**
https://hyperledger-fabric.readthedocs.io/en/release-2.2/whatis.html
* **Fabric-samples**
git checkout release-2.2
https://github.com/hyperledger/fabric-samples
* **Fabric-ca document**
https://hyperledger-fabric-ca.readthedocs.io/en/latest/
* **Chaincode javascripts SDK**
https://hyperledger.github.io/fabric-chaincode-node/
* **Hyperledger-operations-console**
https://github.com/hyperledger-labs/fabric-operations-console
Introduction video https://www.youtube.com/watch?v=HGThtz5A6S8

### Fabric-samples (啟動一個test-network和部署一個智能合約)
1. **安裝Prerequisites**
https://hyperledger-fabric.readthedocs.io/en/release-2.2/prereqs.html
2. **啟動test-network**
[可參考](https://hyperledger-fabric.readthedocs.io/en/release-2.2/test_network.html)(有些版本會不一樣)
git clone https://github.com/hyperledger/fabric-samples.git
cd fabric-samples
git checkout release-2.2
curl -sSL https://bit.ly/2ysbOFE | bash -s 2.2.3 1.4.9
cd test-network
開啟test-network
./network.sh up createChannel -c mychannel -ca -i 2.2.3 -cai 1.4.9

3. **安裝智能合約**
* 方法一 使用binary檔操作(建議先照這個做一次)
從Package the smart contract(javascript)開始
[參考](https://hyperledger-fabric.readthedocs.io/en/release-2.2/deploy_chaincode.html)
* 方法二 使用script部署
ccn chaincode name
ccp chaincode path
ccl chaincode language
ccep chaincode endorsement policy
./network.sh deployCC -ccn basic -ccp ../asset-transfer-basic/chaincode-javascript/ -ccl javascript

4. **與智能合約互動**
* 方法一 使用binary檔案操作
[參考](https://hyperledger-fabric.readthedocs.io/en/release-2.2/deploy_chaincode.html)
* 方法二 使用SDK
[參考](https://hyperledger-fabric.readthedocs.io/en/release-2.2/write_first_app.html)(Sample application開始看)

### Fabric-ca
Public Key Infrastructure，包含Fabric-ca-client和Fabric-ca-server
[參考](https://hyperledger-fabric-ca.readthedocs.io/en/latest/)
User使用Fabric-ca-client向Fabric-ca-server申請x509證書(公鑰)和私鑰
在test-network中啟動ca是先用cryptogen產生自簽證書再啟動Fabric-ca-server
tls-cert.pem 是https的那個s 拿來做加密
設定環境變數
export FABRIC_CA_CLIENT_HOME=${pwd}
使用Fabric-ca-client enroll會得到一個msp資料夾在FABRIC_CA_CLIENT_HOME路徑下，包含以下檔案
* cacerts/localhost-7054.pem的ca證書(沒設定domain name所以是localhost 和tls加密的那個一樣)
* signcerts/cert.pem的使用者的證書
* keystore資料夾下的private key
可用 https://myssl.com/cert_decode.html 查看.pem證書
[可參考](https://github.com/hyperledger/fabric-samples/tree/main/fabcar)(從startFabric.sh可以看一下)

### 之後可以做...
* trace network.sh
* Fabric-samples中所有的Private data和State-Based Endorsement