Hyperledger Intro

Hyperledger项目：

• Hyperledger Fabric
• Hyperledger Sawtooth
• Hyperledger Composer

模型：

• Assets(资产)

一般定义方式：

    /**
     * A vehicle asset.
     */
    asset Vehicle identified by vin {
      o String vin
    }

继承方式：

    /**
     * A car asset. A car is related to a list of parts
     */
    asset Car extends Vehicle {
      o String model
      --> Part[] Parts
    }

抽象方式：

    /**
    * An abstract Vehicle asset.
    */
    abstract asset Vehicle identified by vin {
      o String vin
    }

• Participants(参与者)

  /**
  * An enumerated type
  */
  enum ProductType {
  o DAIRY
  o BEEF
  o VEGETABLES
  }
  participant Farmer identified by farmerId {
      o String farmerId
      o ProductType primaryProduct
  }
  

• Transactions(事务)

• Concepts(概念)

  abstract concept Address {
    o String street
    o String city default ="Winchester"
    o String country default = "UK"
    o Integer[] counts optional
  }
  
  concept UnitedStatesAddress extends Address {
    o String zipcode
  }
  

http://www.8btc.com/blockchain-poc-hyperledger

Test:

概念：

• BND: business network definition (BND)