私有区块链Hyperledger Fabric和公共区块链ARK.io如何通过solidity智能合约结合

笔阁

发布于 2019-05-17 12:31:41

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发布于 2019-05-17 12:31:41

文章被收录于专栏：极客编程

我想展示如何将公共区块链（如ARK.io）的功能与私有区块链（如Hyperledger）结合起来。特别是，我们将看到ARK.io上的交易如何触发在Hyperledger Fabric + Burrow中部署的Solidity Smart Contract的执行。

安装Hyperledger Fabric

删除以前的Hyperledger Docker镜像（如果有）：

docker kill $(docker ps -q)
docker rm $(docker ps -aq)
docker rmi $(docker images dev-* -q)

安装先决条件：

https://hyperledger-fabric.readthedocs.io/en/latest/prereqs.html

安装依赖项：

https://hyperledger-fabric.readthedocs.io/en/latest/install.html
cd ~
curl -sSL http://bit.ly/2ysbOFE | bash -s 1.3.0

设置环境变量：

vi ~/.profile

PATH="$HOME/bin:$HOME/.local/bin:$PATH"
GOPATH="$HOME/go"
FABRIC_CFG_PATH="$GOPATH/src/github.com/hyperledger/fabric-samples/config"
PATH="$GOPATH/bin:/usr/lib/go-1.10/bin:$GOPATH/src/github.com/hyperledger/fabric-samples/bin:$PATH"

export FABPROXY_CONFIG=$GOPATH/src/github.com/hyperledger/fabric-chaincode-evm/examples/first-network-sdk-config.yaml
FABPROXY_USER=User1
FABPROXY_ORG=Org1
FABPROXY_CHANNEL=mychannel
FABPROXY_CCID=evmcc
PORT=5000

source ~/.profile

生成网络架构：

https://hyperledger-fabric.readthedocs.io/en/latest/build_network.html
git clone https://github.com/hyperledger/fabric-samples.git
cd $GOPATH/src/github.com/hyperledger/fabric-samples/first-network
./byfn.sh generate

安装go语言

sudo apt-get remove golang-go 
sudo apt-get remove --auto-remove golang-go
sudo add-apt-repository ppa:gophers/archive
sudo apt-get update
sudo apt-get install golang-1.10-go

安装Hyperledger go SDK:

go get -u github.com/hyperledger/fabric-sdk-go
go get -u github.com/cloudflare/cfssl/cmd/cfssl

go get -u github.com/golang/mock/gomock
go get -u github.com/golang/protobuf/proto
go get -u github.com/golang/protobuf/ptypes
go get -u github.com/golang/protobuf/ptypes/timestamp

安装EVM Chaincode

cd ~
git clone https://github.com/hyperledger/fabric-chaincode-evm.git $GOPATH/src/github.com/hyperledger

cd fabric-samples/first-network/
vi docker-compose-cli.yaml

添加：

cli:
    volumes:
      - ./../../fabric-chaincode-evm:/opt/gopath/src/github.com/hyperledger/fabric-chaincode-evm

关闭网络（如果它已启动）：

./byfn.sh -m down

重新建立网络：

./byfn.sh -m up

构建并启动EVM

docker exec -it cli bash

为PEER0设置环境变量：

export CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
  export CORE_PEER_ADDRESS=peer0.org1.example.com:7051
  export CORE_PEER_LOCALMSPID="Org1MSP"
  export CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt

接下来在所有对等端上安装EVM链代码：

peer chaincode install -n evmcc -l golang -v 0 -p github.com/hyperledger/fabric-chaincode-evm/evmcc

实例化evmcc：

peer chaincode instantiate -n evmcc -v 0 -C mychannel -c '{"Args":[]}' -o orderer.example.com:7050 --tls --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem

部署智能合约

我们将使用一个简单存储合约：https://solidity.readthedocs.io/en/v0.4.24/introduction-to-smart-contracts.html

peer chaincode invoke -n evmcc -C mychannel  -c '{"Args":["0000000000000000000000000000000000000000","608060405234801561001057600080fd5b5060df8061001f6000396000f3006080604052600436106049576000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff16806360fe47b114604e5780636d4ce63c146078575b600080fd5b348015605957600080fd5b5060766004803603810190808035906020019092919050505060a0565b005b348015608357600080fd5b50608a60aa565b6040518082815260200191505060405180910390f35b8060008190555050565b600080549050905600a165627a7a723058203dbaed52da8059a841ed6d7b484bf6fa6f61a7e975a803fdedf076a121a8c4010029"]}' -o orderer.example.com:7050 --tls --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem

请注意包含合约地址的输出：

2018-11-10 00:15:28.257 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 001 Chaincode invoke successful. result: status:200 payload:"7ec1f20fced5ed8d47f94cdab140644a28a85441"

要验证你的合约是否已成功部署，你可以在evmcc中查询合约的运行时字节码：

root@3e4b9a88b2b6:/opt/gopath/src/github.com/hyperledger/fabric/peer# peer chaincode query -n evmcc -C mychannel -c '{"Args":["getCode","7ec1f20fced5ed8d47f94cdab140644a28a85441"]}'
6080604052600436106049576000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff16806360fe47b114604e5780636d4ce63c146078575b600080fd5b348015605957600080fd5b5060766004803603810190808035906020019092919050505060a0565b005b348015608357600080fd5b50608a60aa565b6040518082815260200191505060405180910390f35b8060008190555050565b600080549050905600a165627a7a723058203dbaed52da8059a841ed6d7b484bf6fa6f61a7e975a803fdedf076a121a8c4010029

与已部署的合约交互

peer chaincode invoke -n evmcc -C mychannel -c '{"Args":["7ec1f20fced5ed8d47f94cdab140644a28a85441","60fe47b1000000000000000000000000000000000000000000000000000000000000000a"]}' -o orderer.example.com:7050 --tls --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem

2018-11-10 00:25:31.005 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 001 Chaincode invoke successful. result: status:200 

peer chaincode query -n evmcc -C mychannel -c '{"Args":["7ec1f20fced5ed8d47f94cdab140644a28a85441","6d4ce63c"]}' --hex

获取用户帐户地址

root@3e4b9a88b2b6:/opt/gopath/src/github.com/hyperledger/fabric/peer# peer chaincode query -n evmcc -C mychannel -c '{"Args":["account"]}'

结果03F3C6F335B678F65B41820D97F01BA1151CDF62

使用Web3

设置Fab代理

我们已经在我们的.profile中定义了这些：

export FABPROXY_CONFIG=$GOPATH/src/github.com/hyperledger/fabric-chaincode-evm/examples/first-network-sdk-config.yaml
export FABPROXY_USER=User1
export FABPROXY_ORG=Org1
export FABPROXY_CHANNEL=mychannel
export FABPROXY_CCID=evmcc
export PORT=5000

打开端口：

sudo ufw allow 5000

构建代理：

cd $GOPATH/src/github.com/hyperledger/fabric-chaincode-evm
go build -o fab3 ./fabproxy/cmd

启动代理：

cd ~/go/src/github.com/hyperledger/fabric-chaincode-evm
./fab3

应该看到：

Starting Fab Proxy on port 5000

与先前部署的合约交互

在不同的终端窗口中：

安装web3：

npm install web3@0.20.2

启动node会话：

node

Web3 = require('web3')
web3 = new Web3(new Web3.providers.HttpProvider('http://159.89.146.143:5000'))
web3.eth.defaultAccount = web3.eth.accounts[0]

simpleStorageABI = [
    {
        "constant": false,
        "inputs": [
            {
                "name": "x",
                "type": "uint256"
            }
        ],
        "name": "set",
        "outputs": [],
        "payable": false,
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "constant": true,
        "inputs": [],
        "name": "get",
        "outputs": [
            {
                "name": "",
                "type": "uint256"
            }
        ],
        "payable": false,
      "stateMutability": "view",
      "type": "function"
    }
  ]
SimpleStorage = web3.eth.contract(simpleStorageABI)

myContract = SimpleStorage.at('7ec1f20fced5ed8d47f94cdab140644a28a85441')
myContract.set(10)
 
myContract.get().toNumber()