NewClient returns a new Client using the given Client.

NewServer returns a new Server using the given operations.

NewTestServer constructs a new TestServer that will sign its tree with the given signer key (see golang.org/x/mod/sumdb/note) and fetch new records as needed by calling gosum.

ErrSecurity is returned by Client operations that invoke Client.SecurityError.

ErrWriteConflict signals a write conflict during Client.WriteConfig.

ServerPaths are the URL paths the Server can (and should) serve.

A Client is a client connection to a checksum database.

A Server is the checksum database HTTP server, which implements http.Handler and should be invoked to serve the paths listed in ServerPaths.

A TestServer is an in-memory implementation of Server for testing.

A ClientOps provides the external operations (file caching, HTTP fetches, and so on) needed by the Client.

A ServerOps provides the external operations (underlying database access and so on) needed by the Server.