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autopilot/pref_attachment: rename ConstrainedPrefAttachment->PrefAttachment

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Since the ConstrainedPrefAttachment no longers require the heuristic to
be aware of the autopilot constraints, we rename it PrefAttachment.
This commit is contained in:
Johan T. Halseth
2018-12-19 14:54:54 +01:00
parent ccf4b7feab
commit 3739c19ef8
3 changed files with 33 additions and 100 deletions
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41
autopilot/prefattach.go
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@@ -8,38 +8,29 @@ import (
"github.com/btcsuite/btcutil"
)
// ConstrainedPrefAttachment is an implementation of the AttachmentHeuristic
// interface that implement a constrained non-linear preferential attachment
// heuristic. This means that given a threshold to allocate to automatic
// channel establishment, the heuristic will attempt to favor connecting to
// nodes which already have a set amount of links, selected by sampling from a
// power law distribution. The attachment is non-linear in that it favors
// nodes with a higher in-degree but less so that regular linear preferential
// attachment. As a result, this creates smaller and less clusters than regular
// linear preferential attachment.
// PrefAttachment is an implementation of the AttachmentHeuristic interface
// that implement a non-linear preferential attachment heuristic. This means
// that given a threshold to allocate to automatic channel establishment, the
// heuristic will attempt to favor connecting to nodes which already have a set
// amount of links, selected by sampling from a power law distribution. The
// attachment is non-linear in that it favors nodes with a higher in-degree but
// less so than regular linear preferential attachment. As a result, this
// creates smaller and less clusters than regular linear preferential
// attachment.
//
// TODO(roasbeef): BA, with k=-3
type ConstrainedPrefAttachment struct {
constraints AgentConstraints
type PrefAttachment struct {
}
// NewConstrainedPrefAttachment creates a new instance of a
// ConstrainedPrefAttachment heuristics given bounds on allowed channel sizes,
// and an allocation amount which is interpreted as a percentage of funds that
// is to be committed to channels at all times.
func NewConstrainedPrefAttachment(
cfg AgentConstraints) *ConstrainedPrefAttachment {
// NewPrefAttachment creates a new instance of a PrefAttachment heuristic.
func NewPrefAttachment() *PrefAttachment {
prand.Seed(time.Now().Unix())
return &ConstrainedPrefAttachment{
constraints: cfg,
}
return &PrefAttachment{}
}
// A compile time assertion to ensure ConstrainedPrefAttachment meets the
// A compile time assertion to ensure PrefAttachment meets the
// AttachmentHeuristic interface.
var _ AttachmentHeuristic = (*ConstrainedPrefAttachment)(nil)
var _ AttachmentHeuristic = (*PrefAttachment)(nil)
// NodeID is a simple type that holds an EC public key serialized in compressed
// format.
@@ -69,7 +60,7 @@ func NewNodeID(pub *btcec.PublicKey) NodeID {
// given to nodes already having high connectivity in the graph.
//
// NOTE: This is a part of the AttachmentHeuristic interface.
func (p *ConstrainedPrefAttachment) NodeScores(g ChannelGraph, chans []Channel,
func (p *PrefAttachment) NodeScores(g ChannelGraph, chans []Channel,
chanSize btcutil.Amount, nodes map[NodeID]struct{}) (
map[NodeID]*AttachmentDirective, error) {