智能合约（Smart Contract）是运行在区块链上 的计算机程序。区块链技术让人们可以在去中心化 的情况下达成共识，而智能合约则决定了可以达成 什么样的共识。换言之，区块链只是一个分布式的 记账方式形成的公共账本，智能合约则进一步结合 千千万万个不同的应用场景和经济活动，约定了谁 与谁、在什么情况下记账，进而产生什么样的账本。
go mod init
GO111MODULE=on go mod vendor
区块链
https://github.com/hyperledger/fabric
https://github.com/hyperledger/fabric-samples
| 系统工具 | 版本 |
|---|---|
| ubuntu | 20.04 |
| java | 1.8 |
| golang | go1.15.2 |
| fabric | 2.1.0 |
| fabric-gateway-java | 2.1.4 |
Fabric网络结构
| 节点类型 | 节点名 | 所属组织 | ip | 服务端口 |
|---|---|---|---|---|
| orderer | orderer1.org0.example.com | org0 | 192.168.0.2 | 7050 |
| orderer | orderer2.org0.example.com | org0 | 192.168.0.2 | 8050 |
| orderer | orderer3.org0.example.com | org0 | 192.168.0.2 | 9050 |
| peer | peer0.org1.example.com | org1 | 192.168.0.2 | 7051 |
| peer | peer1.org1.example.com | org1 | 192.168.0.2 | 8051 |
| peer | peer0.org2.example.com | org2 | 192.168.0.2 | 9051 |
| peer | peer1.org2.example.com | org2 | 192.168.0.2 | 10051 |
| peer | peer0.org3.example.com | org3 | 192.168.0.2 | 11051 |
| peer | peer1.org3.example.com | org3 | 192.168.0.2 | 12051 |
| peer | peer0.org4.example.com | org4 | 192.168.0.2 | 13051 |
| peer | peer1.org4.example.com | org4 | 192.168.0.2 | 14051 |
| peer | peer0.org5.example.com | org5 | 192.168.0.2 | 15051 |
| peer | peer1.org5.example.com | org5 | 192.168.0.2 | 16051 |
| couchdb | couchdb0.org1.example.com | org1 | 192.168.0.2 | 5984 |
| couchdb | couchdb1.org1.example.com | org1 | 192.168.0.2 | 6984 |
| couchdb | couchdb0.org2.example.com | org2 | 192.168.0.2 | 7984 |
| couchdb | couchdb1.org2.example.com | org2 | 192.168.0.2 | 8984 |
| couchdb | couchdb0.org3.example.com | org3 | 192.168.0.2 | 9984 |
| couchdb | couchdb1.org3.example.com | org3 | 192.168.0.2 | 10984 |
| couchdb | couchdb0.org4.example.com | org4 | 192.168.0.2 | 11984 |
| couchdb | couchdb1.org4.example.com | org4 | 192.168.0.2 | 12984 |
| couchdb | couchdb0.org5.example.com | org5 | 192.168.0.2 | 13984 |
| couchdb | couchdb1.org5.example.com | org5 | 192.168.0.2 | 14984 |
| ca | ca-tls.ca.example.com | tls | 192.168.0.2 | 7052 |
| ca | ca-org0.ca.example.com | org0 | 192.168.0.2 | 7053 |
| ca | ca-org1.ca.example.com | org1 | 192.168.0.2 | 7054 |
| ca | ca-org2.ca.example.com | org2 | 192.168.0.2 | 7055 |
| ca | ca-org3.ca.example.com | org3 | 192.168.0.2 | 7056 |
| ca | ca-org4.ca.example.com | org4 | 192.168.0.2 | 7057 |
| ca | ca-org5.ca.example.com | org5 | 192.168.0.2 | 7058 |