#老师您好，我build编写的链码时报这个错，直接贴工程里带的链码build也是报这个错，以下是错误信息：
jinyu@ubuntu:~/Desktop/go_workspace/src/github.com/hyperledger/fabric/imocc/chaincode/assetsExchange$ go build --tags=nopkcs11
#github.com/hyperledger/fabric/core/chaincode/shim
…/…/…/core/chaincode/shim/handler.go:242:25: cannot use stub (type *ChaincodeStub) as type ChaincodeStubInterface in argument to handler.cc.Init:
*ChaincodeStub does not implement ChaincodeStubInterface (missing getState method)
have GetState(string) ([]byte, error)
want getState(string) (interface {}, interface {})
…/…/…/core/chaincode/shim/handler.go:317:27: cannot use stub (type *ChaincodeStub) as type ChaincodeStubInterface in argument to handler.cc.Invoke:
*ChaincodeStub does not implement ChaincodeStubInterface (missing getState method)
have GetState(string) ([]byte, error)
want getState(string) (interface {}, interface {})
…/…/…/core/chaincode/shim/mockstub.go:123:21: cannot use stub (type *MockStub) as type ChaincodeStubInterface in argument to stub.cc.Init:
*MockStub does not implement ChaincodeStubInterface (missing getState method)
have GetState(string) ([]byte, error)
want getState(string) (interface {}, interface {})
…/…/…/core/chaincode/shim/mockstub.go:132:23: cannot use stub (type *MockStub) as type ChaincodeStubInterface in argument to stub.cc.Invoke:
*MockStub does not implement ChaincodeStubInterface (missing getState method)
have GetState(string) ([]byte, error)
want getState(string) (interface {}, interface {})
…/…/…/core/chaincode/shim/mockstub.go:142:23: cannot use stub (type *MockStub) as type ChaincodeStubInterface in argument to stub.cc.Invoke:
*MockStub does not implement ChaincodeStubInterface (missing getState method)
have GetState(string) ([]byte, error)
want getState(string) (interface {}, interface {})