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lightningnetwork / lnd / 12293715361

12 Dec 2024 09:38AM UTC coverage: 57.483% (+7.9%) from 49.538%
12293715361

Pull #9348

github

ziggie1984
github: update goveralls tool

The goverall tool had a bug regarding the module versioning of
golang packages see also
https://github.com/mattn/goveralls/pull/222 for more background.
Goveralls is wrapped by another library to make it available for
github actions. So the relevant PR which is referenced here in
LND is:
https://github.com/shogo82148/actions-goveralls/pull/521.
Pull Request #9348: github: update goveralls tool

101897 of 177264 relevant lines covered (57.48%)

24982.4 hits per line

Source File
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0.0
/graph/graphsession/graph_session.go
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package graphsession
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import (
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        "fmt"
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        graphdb "github.com/lightningnetwork/lnd/graph/db"
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        "github.com/lightningnetwork/lnd/kvdb"
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        "github.com/lightningnetwork/lnd/lnwire"
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        "github.com/lightningnetwork/lnd/routing"
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        "github.com/lightningnetwork/lnd/routing/route"
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)
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// Factory implements the routing.GraphSessionFactory and can be used to start
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// a session with a ReadOnlyGraph.
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type Factory struct {
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        graph ReadOnlyGraph
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}
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// NewGraphSessionFactory constructs a new Factory which can then be used to
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// start a new session.
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func NewGraphSessionFactory(graph ReadOnlyGraph) routing.GraphSessionFactory {
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        return &Factory{
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                graph: graph,
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        }
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}
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// NewGraphSession will produce a new Graph to use for a path-finding session.
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// It returns the Graph along with a call-back that must be called once Graph
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// access is complete. This call-back will close any read-only transaction that
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// was created at Graph construction time.
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//
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// NOTE: This is part of the routing.GraphSessionFactory interface.
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func (g *Factory) NewGraphSession() (routing.Graph, func() error, error) {
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        tx, err := g.graph.NewPathFindTx()
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        if err != nil {
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                return nil, nil, err
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        }
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        session := &session{
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                graph: g.graph,
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                tx:    tx,
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        }
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        return session, session.close, nil
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}
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// A compile-time check to ensure that Factory implements the
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// routing.GraphSessionFactory interface.
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var _ routing.GraphSessionFactory = (*Factory)(nil)
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// session is an implementation of the routing.Graph interface where the same
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// read-only transaction is held across calls to the graph and can be used to
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// access the backing channel graph.
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type session struct {
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        graph graph
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        tx    kvdb.RTx
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}
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// NewRoutingGraph constructs a session that which does not first start a
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// read-only transaction and so each call on the routing.Graph will create a
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// new transaction.
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func NewRoutingGraph(graph ReadOnlyGraph) routing.Graph {
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        return &session{
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                graph: graph,
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        }
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}
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// close closes the read-only transaction being used to access the backing
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// graph. If no transaction was started then this is a no-op.
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func (g *session) close() error {
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        if g.tx == nil {
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                return nil
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        }
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        err := g.tx.Rollback()
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        if err != nil {
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                return fmt.Errorf("error closing db tx: %w", err)
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        }
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        return nil
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}
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// ForEachNodeChannel calls the callback for every channel of the given node.
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//
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// NOTE: Part of the routing.Graph interface.
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func (g *session) ForEachNodeChannel(nodePub route.Vertex,
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        cb func(channel *graphdb.DirectedChannel) error) error {
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        return g.graph.ForEachNodeDirectedChannel(g.tx, nodePub, cb)
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}
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// FetchNodeFeatures returns the features of the given node. If the node is
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// unknown, assume no additional features are supported.
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//
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// NOTE: Part of the routing.Graph interface.
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func (g *session) FetchNodeFeatures(nodePub route.Vertex) (
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        *lnwire.FeatureVector, error) {
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        return g.graph.FetchNodeFeatures(nodePub)
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}
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// A compile-time check to ensure that *session implements the
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// routing.Graph interface.
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var _ routing.Graph = (*session)(nil)
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// ReadOnlyGraph is a graph extended with a call to create a new read-only
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// transaction that can then be used to make further queries to the graph.
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type ReadOnlyGraph interface {
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        // NewPathFindTx returns a new read transaction that can be used for a
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        // single path finding session. Will return nil if the graph cache is
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        // enabled.
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        NewPathFindTx() (kvdb.RTx, error)
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        graph
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}
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// graph describes the API necessary for a graph source to have access to on a
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// database implementation, like channeldb.ChannelGraph, in order to be used by
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// the Router for pathfinding.
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type graph interface {
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        // ForEachNodeDirectedChannel iterates through all channels of a given
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        // node, executing the passed callback on the directed edge representing
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        // the channel and its incoming policy. If the callback returns an
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        // error, then the iteration is halted with the error propagated back
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        // up to the caller.
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        //
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        // Unknown policies are passed into the callback as nil values.
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        //
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        // NOTE: if a nil tx is provided, then it is expected that the
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        // implementation create a read only tx.
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        ForEachNodeDirectedChannel(tx kvdb.RTx, node route.Vertex,
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                cb func(channel *graphdb.DirectedChannel) error) error
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        // FetchNodeFeatures returns the features of a given node. If no
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        // features are known for the node, an empty feature vector is returned.
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        FetchNodeFeatures(node route.Vertex) (*lnwire.FeatureVector, error)
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}
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// A compile-time check to ensure that *channeldb.ChannelGraph implements the
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// graph interface.
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var _ graph = (*graphdb.ChannelGraph)(nil)
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