istate

type Error interface {
	Error() string
	GetCode() int
}

type Interface interface {
	// CreateState function is used to create a new state in the state db
	// It must be called via the Interface returned by NewiState function
	// It takes chaincode stub and the actual structure value as input params
	// Note: This function does not do state validations such as, checking whether state exists or not
	// before performing the operation
	CreateState(shim.ChaincodeStubInterface, interface{}) Error
	// ReadState function is used to read a state from state db
	// It must be called via the Interface returned by NewiState function
	// It takes chaincode stub and value of primary key as input params
	// It returns the actual structure value as an interface{}. The returned value can
	// be type asserted to the actual struct type before using
	// Note: This function does not do state validations such as, checking whether state exists or not
	// before performing the operation
	ReadState(shim.ChaincodeStubInterface, interface{}) (interface{}, Error)
	// UpdateState function is used to update a state from statedb
	// It must be called via the Interface returned by NewiState function
	// It takes chaincode stub and the actual structure value as input params
	// Note: This function does not do state validations such as, checking whether state exists or not
	// before performing the operation
	UpdateState(shim.ChaincodeStubInterface, interface{}) Error
	// DeleteState function is used to delete a state from state db
	// It must be called via the Interface returned by NewiState function
	// It takes chaincode stub and value of primary key as input params
	// Note: This function does not do state validations such as, checking whether state exists or not
	// before performing the operation
	DeleteState(shim.ChaincodeStubInterface, interface{}) Error
	// Query function is used to perform Rich Queries over a state type in state db
	// It must be called via the Interface returned by NewiState function
	// It takes stub, query string and isInvoke (bool) flag as input params
	// isInvoke is set true, if this func is called in an invoke transaction
	// It returns slice of actual structure values as an interface{}. The returned value can
	// be type asserted to the actual slice of struct type before using
	// Learn more about the Rich query language formats in README.md
	Query(shim.ChaincodeStubInterface, string, bool) (interface{}, Error)
}

type Options struct {
	CacheSize             int
	DefaultCompactionSize int
}