Documentation ¶
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type QueryResult ¶
type QueryResult interface{}
QueryResult - a general interface for supporting different types of query results. Actual types differ for different queries
type ResultsIterator ¶
type ResultsIterator interface { // Next returns the next item in the result set. The `QueryResult` is expected to be nil when // the iterator gets exhausted Next() (QueryResult, error) // Close releases resources occupied by the iterator Close() }
ResultsIterator - an iterator for query result set
type State ¶
type State interface { // GetStateMultipleKeys gets the values for multiple keys in a single call GetStateMultipleKeys(namespace string, keys []string) ([][]byte, error) // GetStateRangeScanIterator returns an iterator that contains all the key-values between given key ranges. // startKey is included in the results and endKey is excluded. An empty startKey refers to the first available key // and an empty endKey refers to the last available key. For scanning all the keys, both the startKey and the endKey // can be supplied as empty strings. However, a full scan should be used judiciously for performance reasons. // The returned ResultsIterator contains results of type *KV which is defined in protos/ledger/queryresult. GetStateRangeScanIterator(namespace string, startKey string, endKey string) (ResultsIterator, error) // GetStateMetadata returns the metadata for given namespace and key GetStateMetadata(namespace, key string) (map[string][]byte, error) // GetPrivateDataMetadataByHash gets the metadata of a private data item identified by a tuple <namespace, collection, keyhash> GetPrivateDataMetadataByHash(namespace, collection string, keyhash []byte) (map[string][]byte, error) // Done releases resources occupied by the State Done() }
State defines interaction with the world state
type StateFetcher ¶
type StateFetcher interface { validation.Dependency // FetchState fetches state FetchState() (State, error) }
StateFetcher retrieves an instance of a state
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