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routing: add graph interface

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This commit is contained in:
Joost Jager
2020-01-27 12:33:53 +01:00
parent a8ed1b342a
commit 06bdeb56e2
4 changed files with 206 additions and 100 deletions
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26
routing/router.go
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@ -2311,6 +2311,13 @@ func (r *ChannelRouter) BuildRoute(amt *lnwire.MilliSatoshi,
return nil, err
}
// Fetch the current block height outside the routing transaction, to
// prevent the rpc call blocking the database.
_, height, err := r.cfg.Chain.GetBestBlock()
if err != nil {
return nil, err
}
// Allocate a list that will contain the unified policies for this
// route.
edges := make([]*unifiedPolicy, len(hops))
@ -2328,6 +2335,18 @@ func (r *ChannelRouter) BuildRoute(amt *lnwire.MilliSatoshi,
runningAmt = *amt
}
// Open a transaction to execute the graph queries in.
routingTx, err := newDbRoutingTx(r.cfg.Graph)
if err != nil {
return nil, err
}
defer func() {
err := routingTx.close()
if err != nil {
log.Errorf("Error closing db tx: %v", err)
}
}()
// Traverse hops backwards to accumulate fees in the running amounts.
source := r.selfNode.PubKeyBytes
for i := len(hops) - 1; i >= 0; i-- {
@ -2346,7 +2365,7 @@ func (r *ChannelRouter) BuildRoute(amt *lnwire.MilliSatoshi,
// known in the graph.
u := newUnifiedPolicies(source, toNode, outgoingChan)
err := u.addGraphPolicies(r.cfg.Graph, nil)
err := u.addGraphPolicies(routingTx)
if err != nil {
return nil, err
}
@ -2414,11 +2433,6 @@ func (r *ChannelRouter) BuildRoute(amt *lnwire.MilliSatoshi,
}
// Build and return the final route.
_, height, err := r.cfg.Chain.GetBestBlock()
if err != nil {
return nil, err
}
return newRoute(
source, pathEdges, uint32(height),
finalHopParams{