chaincode.go

chaincode.go

定义接口 Chaincode 和 ChaincodeStub。

type Chaincode interface { // Init is called during Deploy transaction after the container has been // established, allowing the chaincode to initialize its internal data Init(stub *ChaincodeStub, function string, args []string) ([]byte, error) // Invoke is called for every Invoke transactions. The chaincode may change // its state variables Invoke(stub *ChaincodeStub, function string, args []string) ([]byte, error) // Query is called for Query transactions. The chaincode may only read // (but not modify) its state variables and return the result Query(stub *ChaincodeStub, function string, args []string) ([]byte, error)}

用户自己编写的 chaincode 代码需要实现这三个接口，在代码中通过 stub 来跟 ledger 交互。

type ChaincodeStub struct { UUID string securityContext *pb.ChaincodeSecurityContext chaincodeEvent *pb.ChaincodeEvent args [][]byte}