363caa441a
In this commit, we remove the restriction surrounding the largest invoices that we'll allow a user to create. After #3967 has landed, users will be able to send in _aggregate_ a payment larger than the current max HTLC size limit in the network. As a result, we can just treat that value as the system's MTU, and allow users to request payments it multiples of that MTU value. A follow up to this PR at a later time will also allow wumbo _channels_. However, that requires us to tweak the way we scale CSV values, as post wumbo, there is no true channel size limit, only the _local_ limit of a given node. We also need to implement a way for nodes to signal to other nodes their accepted max channel size.
1221 lines
34 KiB
Go
1221 lines
34 KiB
Go
package routerrpc
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import (
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"context"
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"encoding/hex"
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"errors"
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"fmt"
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math "math"
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"time"
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"github.com/btcsuite/btcd/btcec"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcutil"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/htlcswitch"
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"github.com/lightningnetwork/lnd/lnrpc"
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"github.com/lightningnetwork/lnd/lntypes"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/lightningnetwork/lnd/record"
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"github.com/lightningnetwork/lnd/routing"
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"github.com/lightningnetwork/lnd/routing/route"
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"github.com/lightningnetwork/lnd/subscribe"
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"github.com/lightningnetwork/lnd/zpay32"
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)
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// RouterBackend contains the backend implementation of the router rpc sub
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// server calls.
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type RouterBackend struct {
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// MaxPaymentMSat is the largest payment permitted by the backend.
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MaxPaymentMSat lnwire.MilliSatoshi
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// SelfNode is the vertex of the node sending the payment.
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SelfNode route.Vertex
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// FetchChannelCapacity is a closure that we'll use the fetch the total
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// capacity of a channel to populate in responses.
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FetchChannelCapacity func(chanID uint64) (btcutil.Amount, error)
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// FetchChannelEndpoints returns the pubkeys of both endpoints of the
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// given channel id.
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FetchChannelEndpoints func(chanID uint64) (route.Vertex,
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route.Vertex, error)
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// FindRoutes is a closure that abstracts away how we locate/query for
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// routes.
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FindRoute func(source, target route.Vertex,
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amt lnwire.MilliSatoshi, restrictions *routing.RestrictParams,
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destCustomRecords record.CustomSet,
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routeHints map[route.Vertex][]*channeldb.ChannelEdgePolicy,
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finalExpiry uint16) (*route.Route, error)
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MissionControl MissionControl
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// ActiveNetParams are the network parameters of the primary network
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// that the route is operating on. This is necessary so we can ensure
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// that we receive payment requests that send to destinations on our
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// network.
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ActiveNetParams *chaincfg.Params
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// Tower is the ControlTower instance that is used to track pending
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// payments.
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Tower routing.ControlTower
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// MaxTotalTimelock is the maximum total time lock a route is allowed to
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// have.
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MaxTotalTimelock uint32
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// DefaultFinalCltvDelta is the default value used as final cltv delta
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// when an RPC caller doesn't specify a value.
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DefaultFinalCltvDelta uint16
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// SubscribeHtlcEvents returns a subscription client for the node's
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// htlc events.
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SubscribeHtlcEvents func() (*subscribe.Client, error)
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}
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// MissionControl defines the mission control dependencies of routerrpc.
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type MissionControl interface {
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// GetProbability is expected to return the success probability of a
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// payment from fromNode to toNode.
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GetProbability(fromNode, toNode route.Vertex,
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amt lnwire.MilliSatoshi) float64
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// ResetHistory resets the history of MissionControl returning it to a
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// state as if no payment attempts have been made.
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ResetHistory() error
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// GetHistorySnapshot takes a snapshot from the current mission control
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// state and actual probability estimates.
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GetHistorySnapshot() *routing.MissionControlSnapshot
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// GetPairHistorySnapshot returns the stored history for a given node
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// pair.
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GetPairHistorySnapshot(fromNode,
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toNode route.Vertex) routing.TimedPairResult
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}
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// QueryRoutes attempts to query the daemons' Channel Router for a possible
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// route to a target destination capable of carrying a specific amount of
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// satoshis within the route's flow. The retuned route contains the full
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// details required to craft and send an HTLC, also including the necessary
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// information that should be present within the Sphinx packet encapsulated
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// within the HTLC.
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//
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// TODO(roasbeef): should return a slice of routes in reality * create separate
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// PR to send based on well formatted route
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func (r *RouterBackend) QueryRoutes(ctx context.Context,
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in *lnrpc.QueryRoutesRequest) (*lnrpc.QueryRoutesResponse, error) {
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parsePubKey := func(key string) (route.Vertex, error) {
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pubKeyBytes, err := hex.DecodeString(key)
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if err != nil {
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return route.Vertex{}, err
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}
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return route.NewVertexFromBytes(pubKeyBytes)
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}
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// Parse the hex-encoded source and target public keys into full public
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// key objects we can properly manipulate.
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targetPubKey, err := parsePubKey(in.PubKey)
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if err != nil {
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return nil, err
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}
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var sourcePubKey route.Vertex
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if in.SourcePubKey != "" {
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var err error
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sourcePubKey, err = parsePubKey(in.SourcePubKey)
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if err != nil {
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return nil, err
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}
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} else {
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// If no source is specified, use self.
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sourcePubKey = r.SelfNode
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}
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// Currently, within the bootstrap phase of the network, we limit the
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// largest payment size allotted to (2^32) - 1 mSAT or 4.29 million
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// satoshis.
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amt, err := lnrpc.UnmarshallAmt(in.Amt, in.AmtMsat)
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if err != nil {
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return nil, err
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}
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if amt > r.MaxPaymentMSat {
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return nil, fmt.Errorf("payment of %v is too large, max payment "+
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"allowed is %v", amt, r.MaxPaymentMSat.ToSatoshis())
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}
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// Unmarshall restrictions from request.
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feeLimit := lnrpc.CalculateFeeLimit(in.FeeLimit, amt)
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ignoredNodes := make(map[route.Vertex]struct{})
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for _, ignorePubKey := range in.IgnoredNodes {
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ignoreVertex, err := route.NewVertexFromBytes(ignorePubKey)
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if err != nil {
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return nil, err
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}
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ignoredNodes[ignoreVertex] = struct{}{}
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}
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ignoredPairs := make(map[routing.DirectedNodePair]struct{})
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// Convert deprecated ignoredEdges to pairs.
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for _, ignoredEdge := range in.IgnoredEdges {
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pair, err := r.rpcEdgeToPair(ignoredEdge)
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if err != nil {
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log.Warnf("Ignore channel %v skipped: %v",
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ignoredEdge.ChannelId, err)
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continue
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}
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ignoredPairs[pair] = struct{}{}
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}
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// Add ignored pairs to set.
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for _, ignorePair := range in.IgnoredPairs {
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from, err := route.NewVertexFromBytes(ignorePair.From)
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if err != nil {
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return nil, err
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}
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to, err := route.NewVertexFromBytes(ignorePair.To)
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if err != nil {
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return nil, err
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}
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pair := routing.NewDirectedNodePair(from, to)
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ignoredPairs[pair] = struct{}{}
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}
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// Since QueryRoutes allows having a different source other than
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// ourselves, we'll only apply our max time lock if we are the source.
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maxTotalTimelock := r.MaxTotalTimelock
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if sourcePubKey != r.SelfNode {
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maxTotalTimelock = math.MaxUint32
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}
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cltvLimit, err := ValidateCLTVLimit(in.CltvLimit, maxTotalTimelock)
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if err != nil {
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return nil, err
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}
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// We need to subtract the final delta before passing it into path
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// finding. The optimal path is independent of the final cltv delta and
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// the path finding algorithm is unaware of this value.
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finalCLTVDelta := r.DefaultFinalCltvDelta
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if in.FinalCltvDelta != 0 {
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finalCLTVDelta = uint16(in.FinalCltvDelta)
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}
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cltvLimit -= uint32(finalCLTVDelta)
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// Parse destination feature bits.
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features, err := UnmarshalFeatures(in.DestFeatures)
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if err != nil {
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return nil, err
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}
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restrictions := &routing.RestrictParams{
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FeeLimit: feeLimit,
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ProbabilitySource: func(fromNode, toNode route.Vertex,
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amt lnwire.MilliSatoshi) float64 {
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if _, ok := ignoredNodes[fromNode]; ok {
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return 0
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}
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pair := routing.DirectedNodePair{
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From: fromNode,
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To: toNode,
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}
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if _, ok := ignoredPairs[pair]; ok {
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return 0
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}
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if !in.UseMissionControl {
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return 1
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}
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return r.MissionControl.GetProbability(
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fromNode, toNode, amt,
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)
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},
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DestCustomRecords: record.CustomSet(in.DestCustomRecords),
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CltvLimit: cltvLimit,
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DestFeatures: features,
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}
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// Pass along an outgoing channel restriction if specified.
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if in.OutgoingChanId != 0 {
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restrictions.OutgoingChannelID = &in.OutgoingChanId
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}
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// Pass along a last hop restriction if specified.
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if len(in.LastHopPubkey) > 0 {
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lastHop, err := route.NewVertexFromBytes(
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in.LastHopPubkey,
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)
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if err != nil {
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return nil, err
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}
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restrictions.LastHop = &lastHop
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}
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// If we have any TLV records destined for the final hop, then we'll
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// attempt to decode them now into a form that the router can more
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// easily manipulate.
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customRecords := record.CustomSet(in.DestCustomRecords)
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if err := customRecords.Validate(); err != nil {
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return nil, err
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}
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// Convert route hints to an edge map.
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routeHints, err := unmarshallRouteHints(in.RouteHints)
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if err != nil {
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return nil, err
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}
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routeHintEdges, err := routing.RouteHintsToEdges(
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routeHints, targetPubKey,
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)
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if err != nil {
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return nil, err
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}
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// Query the channel router for a possible path to the destination that
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// can carry `in.Amt` satoshis _including_ the total fee required on
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// the route.
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route, err := r.FindRoute(
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sourcePubKey, targetPubKey, amt, restrictions,
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customRecords, routeHintEdges, finalCLTVDelta,
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)
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if err != nil {
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return nil, err
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}
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// For each valid route, we'll convert the result into the format
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// required by the RPC system.
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rpcRoute, err := r.MarshallRoute(route)
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if err != nil {
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return nil, err
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}
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// Calculate route success probability. Do not rely on a probability
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// that could have been returned from path finding, because mission
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// control may have been disabled in the provided ProbabilitySource.
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successProb := r.getSuccessProbability(route)
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routeResp := &lnrpc.QueryRoutesResponse{
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Routes: []*lnrpc.Route{rpcRoute},
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SuccessProb: successProb,
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}
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return routeResp, nil
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}
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// getSuccessProbability returns the success probability for the given route
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// based on the current state of mission control.
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func (r *RouterBackend) getSuccessProbability(rt *route.Route) float64 {
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fromNode := rt.SourcePubKey
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amtToFwd := rt.TotalAmount
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successProb := 1.0
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for _, hop := range rt.Hops {
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toNode := hop.PubKeyBytes
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probability := r.MissionControl.GetProbability(
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fromNode, toNode, amtToFwd,
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)
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successProb *= probability
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amtToFwd = hop.AmtToForward
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fromNode = toNode
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}
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return successProb
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}
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// rpcEdgeToPair looks up the provided channel and returns the channel endpoints
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// as a directed pair.
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func (r *RouterBackend) rpcEdgeToPair(e *lnrpc.EdgeLocator) (
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routing.DirectedNodePair, error) {
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a, b, err := r.FetchChannelEndpoints(e.ChannelId)
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if err != nil {
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return routing.DirectedNodePair{}, err
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}
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var pair routing.DirectedNodePair
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if e.DirectionReverse {
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pair.From, pair.To = b, a
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} else {
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pair.From, pair.To = a, b
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}
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return pair, nil
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}
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// MarshallRoute marshalls an internal route to an rpc route struct.
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func (r *RouterBackend) MarshallRoute(route *route.Route) (*lnrpc.Route, error) {
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resp := &lnrpc.Route{
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TotalTimeLock: route.TotalTimeLock,
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TotalFees: int64(route.TotalFees().ToSatoshis()),
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TotalFeesMsat: int64(route.TotalFees()),
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TotalAmt: int64(route.TotalAmount.ToSatoshis()),
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TotalAmtMsat: int64(route.TotalAmount),
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Hops: make([]*lnrpc.Hop, len(route.Hops)),
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}
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incomingAmt := route.TotalAmount
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for i, hop := range route.Hops {
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fee := route.HopFee(i)
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// Channel capacity is not a defining property of a route. For
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// backwards RPC compatibility, we retrieve it here from the
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// graph.
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chanCapacity, err := r.FetchChannelCapacity(hop.ChannelID)
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if err != nil {
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// If capacity cannot be retrieved, this may be a
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// not-yet-received or private channel. Then report
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// amount that is sent through the channel as capacity.
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chanCapacity = incomingAmt.ToSatoshis()
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}
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// Extract the MPP fields if present on this hop.
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var mpp *lnrpc.MPPRecord
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if hop.MPP != nil {
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addr := hop.MPP.PaymentAddr()
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mpp = &lnrpc.MPPRecord{
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PaymentAddr: addr[:],
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TotalAmtMsat: int64(hop.MPP.TotalMsat()),
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}
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}
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resp.Hops[i] = &lnrpc.Hop{
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ChanId: hop.ChannelID,
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ChanCapacity: int64(chanCapacity),
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AmtToForward: int64(hop.AmtToForward.ToSatoshis()),
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AmtToForwardMsat: int64(hop.AmtToForward),
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Fee: int64(fee.ToSatoshis()),
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FeeMsat: int64(fee),
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Expiry: uint32(hop.OutgoingTimeLock),
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PubKey: hex.EncodeToString(
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hop.PubKeyBytes[:],
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),
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CustomRecords: hop.CustomRecords,
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TlvPayload: !hop.LegacyPayload,
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MppRecord: mpp,
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}
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incomingAmt = hop.AmtToForward
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}
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return resp, nil
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}
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// UnmarshallHopWithPubkey unmarshalls an rpc hop for which the pubkey has
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// already been extracted.
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func UnmarshallHopWithPubkey(rpcHop *lnrpc.Hop, pubkey route.Vertex) (*route.Hop,
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error) {
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customRecords := record.CustomSet(rpcHop.CustomRecords)
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if err := customRecords.Validate(); err != nil {
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return nil, err
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}
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mpp, err := UnmarshalMPP(rpcHop.MppRecord)
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if err != nil {
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return nil, err
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}
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return &route.Hop{
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OutgoingTimeLock: rpcHop.Expiry,
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AmtToForward: lnwire.MilliSatoshi(rpcHop.AmtToForwardMsat),
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PubKeyBytes: pubkey,
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ChannelID: rpcHop.ChanId,
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CustomRecords: customRecords,
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LegacyPayload: !rpcHop.TlvPayload,
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MPP: mpp,
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}, nil
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}
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// UnmarshallHop unmarshalls an rpc hop that may or may not contain a node
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// pubkey.
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func (r *RouterBackend) UnmarshallHop(rpcHop *lnrpc.Hop,
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prevNodePubKey [33]byte) (*route.Hop, error) {
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var pubKeyBytes [33]byte
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if rpcHop.PubKey != "" {
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// Unmarshall the provided hop pubkey.
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pubKey, err := hex.DecodeString(rpcHop.PubKey)
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if err != nil {
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return nil, fmt.Errorf("cannot decode pubkey %s",
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rpcHop.PubKey)
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}
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copy(pubKeyBytes[:], pubKey)
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} else {
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// If no pub key is given of the hop, the local channel graph
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// needs to be queried to complete the information necessary for
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// routing. Discard edge policies, because they may be nil.
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node1, node2, err := r.FetchChannelEndpoints(rpcHop.ChanId)
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if err != nil {
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return nil, err
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}
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switch {
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case prevNodePubKey == node1:
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pubKeyBytes = node2
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case prevNodePubKey == node2:
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pubKeyBytes = node1
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default:
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return nil, fmt.Errorf("channel edge does not match " +
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"expected node")
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}
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}
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return UnmarshallHopWithPubkey(rpcHop, pubKeyBytes)
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}
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|
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// UnmarshallRoute unmarshalls an rpc route. For hops that don't specify a
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// pubkey, the channel graph is queried.
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func (r *RouterBackend) UnmarshallRoute(rpcroute *lnrpc.Route) (
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*route.Route, error) {
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prevNodePubKey := r.SelfNode
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hops := make([]*route.Hop, len(rpcroute.Hops))
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for i, hop := range rpcroute.Hops {
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routeHop, err := r.UnmarshallHop(hop, prevNodePubKey)
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if err != nil {
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return nil, err
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}
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if routeHop.AmtToForward > r.MaxPaymentMSat {
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return nil, fmt.Errorf("payment of %v is too large, "+
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"max payment allowed is %v",
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routeHop.AmtToForward,
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r.MaxPaymentMSat.ToSatoshis())
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}
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hops[i] = routeHop
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prevNodePubKey = routeHop.PubKeyBytes
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}
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|
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route, err := route.NewRouteFromHops(
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lnwire.MilliSatoshi(rpcroute.TotalAmtMsat),
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rpcroute.TotalTimeLock,
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r.SelfNode,
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hops,
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)
|
|
if err != nil {
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return nil, err
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}
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|
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return route, nil
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}
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|
|
|
// extractIntentFromSendRequest attempts to parse the SendRequest details
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|
// required to dispatch a client from the information presented by an RPC
|
|
// client.
|
|
func (r *RouterBackend) extractIntentFromSendRequest(
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rpcPayReq *SendPaymentRequest) (*routing.LightningPayment, error) {
|
|
|
|
payIntent := &routing.LightningPayment{}
|
|
|
|
// Pass along an outgoing channel restriction if specified.
|
|
if rpcPayReq.OutgoingChanId != 0 {
|
|
payIntent.OutgoingChannelID = &rpcPayReq.OutgoingChanId
|
|
}
|
|
|
|
// Pass along a last hop restriction if specified.
|
|
if len(rpcPayReq.LastHopPubkey) > 0 {
|
|
lastHop, err := route.NewVertexFromBytes(
|
|
rpcPayReq.LastHopPubkey,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
payIntent.LastHop = &lastHop
|
|
}
|
|
|
|
// Take the CLTV limit from the request if set, otherwise use the max.
|
|
cltvLimit, err := ValidateCLTVLimit(
|
|
uint32(rpcPayReq.CltvLimit), r.MaxTotalTimelock,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
payIntent.CltvLimit = cltvLimit
|
|
|
|
// Take max htlcs from the request. Map zero to one for backwards
|
|
// compatibility.
|
|
maxHtlcs := rpcPayReq.MaxHtlcs
|
|
if maxHtlcs == 0 {
|
|
maxHtlcs = 1
|
|
}
|
|
payIntent.MaxHtlcs = maxHtlcs
|
|
|
|
// Take fee limit from request.
|
|
payIntent.FeeLimit, err = lnrpc.UnmarshallAmt(
|
|
rpcPayReq.FeeLimitSat, rpcPayReq.FeeLimitMsat,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Set payment attempt timeout.
|
|
if rpcPayReq.TimeoutSeconds == 0 {
|
|
return nil, errors.New("timeout_seconds must be specified")
|
|
}
|
|
|
|
customRecords := record.CustomSet(rpcPayReq.DestCustomRecords)
|
|
if err := customRecords.Validate(); err != nil {
|
|
return nil, err
|
|
}
|
|
payIntent.DestCustomRecords = customRecords
|
|
|
|
payIntent.PayAttemptTimeout = time.Second *
|
|
time.Duration(rpcPayReq.TimeoutSeconds)
|
|
|
|
// Route hints.
|
|
routeHints, err := unmarshallRouteHints(
|
|
rpcPayReq.RouteHints,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
payIntent.RouteHints = routeHints
|
|
|
|
// Unmarshall either sat or msat amount from request.
|
|
reqAmt, err := lnrpc.UnmarshallAmt(
|
|
rpcPayReq.Amt, rpcPayReq.AmtMsat,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// If the payment request field isn't blank, then the details of the
|
|
// invoice are encoded entirely within the encoded payReq. So we'll
|
|
// attempt to decode it, populating the payment accordingly.
|
|
if rpcPayReq.PaymentRequest != "" {
|
|
switch {
|
|
|
|
case len(rpcPayReq.Dest) > 0:
|
|
return nil, errors.New("dest and payment_request " +
|
|
"cannot appear together")
|
|
|
|
case len(rpcPayReq.PaymentHash) > 0:
|
|
return nil, errors.New("dest and payment_hash " +
|
|
"cannot appear together")
|
|
|
|
case rpcPayReq.FinalCltvDelta != 0:
|
|
return nil, errors.New("dest and final_cltv_delta " +
|
|
"cannot appear together")
|
|
}
|
|
|
|
payReq, err := zpay32.Decode(
|
|
rpcPayReq.PaymentRequest, r.ActiveNetParams,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Next, we'll ensure that this payreq hasn't already expired.
|
|
err = ValidatePayReqExpiry(payReq)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// If the amount was not included in the invoice, then we let
|
|
// the payee specify the amount of satoshis they wish to send.
|
|
// We override the amount to pay with the amount provided from
|
|
// the payment request.
|
|
if payReq.MilliSat == nil {
|
|
if reqAmt == 0 {
|
|
return nil, errors.New("amount must be " +
|
|
"specified when paying a zero amount " +
|
|
"invoice")
|
|
}
|
|
|
|
payIntent.Amount = reqAmt
|
|
} else {
|
|
if reqAmt != 0 {
|
|
return nil, errors.New("amount must not be " +
|
|
"specified when paying a non-zero " +
|
|
" amount invoice")
|
|
}
|
|
|
|
payIntent.Amount = *payReq.MilliSat
|
|
}
|
|
|
|
copy(payIntent.PaymentHash[:], payReq.PaymentHash[:])
|
|
destKey := payReq.Destination.SerializeCompressed()
|
|
copy(payIntent.Target[:], destKey)
|
|
|
|
payIntent.FinalCLTVDelta = uint16(payReq.MinFinalCLTVExpiry())
|
|
payIntent.RouteHints = append(
|
|
payIntent.RouteHints, payReq.RouteHints...,
|
|
)
|
|
payIntent.DestFeatures = payReq.Features
|
|
payIntent.PaymentAddr = payReq.PaymentAddr
|
|
payIntent.PaymentRequest = []byte(rpcPayReq.PaymentRequest)
|
|
} else {
|
|
// Otherwise, If the payment request field was not specified
|
|
// (and a custom route wasn't specified), construct the payment
|
|
// from the other fields.
|
|
|
|
// Payment destination.
|
|
target, err := route.NewVertexFromBytes(rpcPayReq.Dest)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
payIntent.Target = target
|
|
|
|
// Final payment CLTV delta.
|
|
if rpcPayReq.FinalCltvDelta != 0 {
|
|
payIntent.FinalCLTVDelta =
|
|
uint16(rpcPayReq.FinalCltvDelta)
|
|
} else {
|
|
payIntent.FinalCLTVDelta = r.DefaultFinalCltvDelta
|
|
}
|
|
|
|
// Amount.
|
|
if reqAmt == 0 {
|
|
return nil, errors.New("amount must be specified")
|
|
}
|
|
|
|
payIntent.Amount = reqAmt
|
|
|
|
// Payment hash.
|
|
copy(payIntent.PaymentHash[:], rpcPayReq.PaymentHash)
|
|
|
|
// Parse destination feature bits.
|
|
features, err := UnmarshalFeatures(rpcPayReq.DestFeatures)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
payIntent.DestFeatures = features
|
|
}
|
|
|
|
// Check for disallowed payments to self.
|
|
if !rpcPayReq.AllowSelfPayment && payIntent.Target == r.SelfNode {
|
|
return nil, errors.New("self-payments not allowed")
|
|
}
|
|
|
|
return payIntent, nil
|
|
}
|
|
|
|
// unmarshallRouteHints unmarshalls a list of route hints.
|
|
func unmarshallRouteHints(rpcRouteHints []*lnrpc.RouteHint) (
|
|
[][]zpay32.HopHint, error) {
|
|
|
|
routeHints := make([][]zpay32.HopHint, 0, len(rpcRouteHints))
|
|
for _, rpcRouteHint := range rpcRouteHints {
|
|
routeHint := make(
|
|
[]zpay32.HopHint, 0, len(rpcRouteHint.HopHints),
|
|
)
|
|
for _, rpcHint := range rpcRouteHint.HopHints {
|
|
hint, err := unmarshallHopHint(rpcHint)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
routeHint = append(routeHint, hint)
|
|
}
|
|
routeHints = append(routeHints, routeHint)
|
|
}
|
|
|
|
return routeHints, nil
|
|
}
|
|
|
|
// unmarshallHopHint unmarshalls a single hop hint.
|
|
func unmarshallHopHint(rpcHint *lnrpc.HopHint) (zpay32.HopHint, error) {
|
|
pubBytes, err := hex.DecodeString(rpcHint.NodeId)
|
|
if err != nil {
|
|
return zpay32.HopHint{}, err
|
|
}
|
|
|
|
pubkey, err := btcec.ParsePubKey(pubBytes, btcec.S256())
|
|
if err != nil {
|
|
return zpay32.HopHint{}, err
|
|
}
|
|
|
|
return zpay32.HopHint{
|
|
NodeID: pubkey,
|
|
ChannelID: rpcHint.ChanId,
|
|
FeeBaseMSat: rpcHint.FeeBaseMsat,
|
|
FeeProportionalMillionths: rpcHint.FeeProportionalMillionths,
|
|
CLTVExpiryDelta: uint16(rpcHint.CltvExpiryDelta),
|
|
}, nil
|
|
}
|
|
|
|
// UnmarshalFeatures converts a list of uint32's into a valid feature vector.
|
|
// This method checks that feature bit pairs aren't assigned toegether, and
|
|
// validates transitive dependencies.
|
|
func UnmarshalFeatures(
|
|
rpcFeatures []lnrpc.FeatureBit) (*lnwire.FeatureVector, error) {
|
|
|
|
// If no destination features are specified we'll return nil to signal
|
|
// that the router should try to use the graph as a fallback.
|
|
if rpcFeatures == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
raw := lnwire.NewRawFeatureVector()
|
|
for _, bit := range rpcFeatures {
|
|
err := raw.SafeSet(lnwire.FeatureBit(bit))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return lnwire.NewFeatureVector(raw, lnwire.Features), nil
|
|
}
|
|
|
|
// ValidatePayReqExpiry checks if the passed payment request has expired. In
|
|
// the case it has expired, an error will be returned.
|
|
func ValidatePayReqExpiry(payReq *zpay32.Invoice) error {
|
|
expiry := payReq.Expiry()
|
|
validUntil := payReq.Timestamp.Add(expiry)
|
|
if time.Now().After(validUntil) {
|
|
return fmt.Errorf("invoice expired. Valid until %v", validUntil)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ValidateCLTVLimit returns a valid CLTV limit given a value and a maximum. If
|
|
// the value exceeds the maximum, then an error is returned. If the value is 0,
|
|
// then the maximum is used.
|
|
func ValidateCLTVLimit(val, max uint32) (uint32, error) {
|
|
switch {
|
|
case val == 0:
|
|
return max, nil
|
|
case val > max:
|
|
return 0, fmt.Errorf("total time lock of %v exceeds max "+
|
|
"allowed %v", val, max)
|
|
default:
|
|
return val, nil
|
|
}
|
|
}
|
|
|
|
// UnmarshalMPP accepts the mpp_total_amt_msat and mpp_payment_addr fields from
|
|
// an RPC request and converts into an record.MPP object. An error is returned
|
|
// if the payment address is not 0 or 32 bytes. If the total amount and payment
|
|
// address are zero-value, the return value will be nil signaling there is no
|
|
// MPP record to attach to this hop. Otherwise, a non-nil reocrd will be
|
|
// contained combining the provided values.
|
|
func UnmarshalMPP(reqMPP *lnrpc.MPPRecord) (*record.MPP, error) {
|
|
// If no MPP record was submitted, assume the user wants to send a
|
|
// regular payment.
|
|
if reqMPP == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
reqTotal := reqMPP.TotalAmtMsat
|
|
reqAddr := reqMPP.PaymentAddr
|
|
|
|
switch {
|
|
|
|
// No MPP fields were provided.
|
|
case reqTotal == 0 && len(reqAddr) == 0:
|
|
return nil, fmt.Errorf("missing total_msat and payment_addr")
|
|
|
|
// Total is present, but payment address is missing.
|
|
case reqTotal > 0 && len(reqAddr) == 0:
|
|
return nil, fmt.Errorf("missing payment_addr")
|
|
|
|
// Payment address is present, but total is missing.
|
|
case reqTotal == 0 && len(reqAddr) > 0:
|
|
return nil, fmt.Errorf("missing total_msat")
|
|
}
|
|
|
|
addr, err := lntypes.MakeHash(reqAddr)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unable to parse "+
|
|
"payment_addr: %v", err)
|
|
}
|
|
|
|
total := lnwire.MilliSatoshi(reqTotal)
|
|
|
|
return record.NewMPP(total, addr), nil
|
|
}
|
|
|
|
// MarshalHTLCAttempt constructs an RPC HTLCAttempt from the db representation.
|
|
func (r *RouterBackend) MarshalHTLCAttempt(
|
|
htlc channeldb.HTLCAttempt) (*lnrpc.HTLCAttempt, error) {
|
|
|
|
route, err := r.MarshallRoute(&htlc.Route)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
rpcAttempt := &lnrpc.HTLCAttempt{
|
|
AttemptTimeNs: MarshalTimeNano(htlc.AttemptTime),
|
|
Route: route,
|
|
}
|
|
|
|
switch {
|
|
case htlc.Settle != nil:
|
|
rpcAttempt.Status = lnrpc.HTLCAttempt_SUCCEEDED
|
|
rpcAttempt.ResolveTimeNs = MarshalTimeNano(
|
|
htlc.Settle.SettleTime,
|
|
)
|
|
|
|
case htlc.Failure != nil:
|
|
rpcAttempt.Status = lnrpc.HTLCAttempt_FAILED
|
|
rpcAttempt.ResolveTimeNs = MarshalTimeNano(
|
|
htlc.Failure.FailTime,
|
|
)
|
|
|
|
var err error
|
|
rpcAttempt.Failure, err = marshallHtlcFailure(htlc.Failure)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
default:
|
|
rpcAttempt.Status = lnrpc.HTLCAttempt_IN_FLIGHT
|
|
}
|
|
|
|
return rpcAttempt, nil
|
|
}
|
|
|
|
// marshallHtlcFailure marshalls htlc fail info from the database to its rpc
|
|
// representation.
|
|
func marshallHtlcFailure(failure *channeldb.HTLCFailInfo) (*lnrpc.Failure,
|
|
error) {
|
|
|
|
rpcFailure := &lnrpc.Failure{
|
|
FailureSourceIndex: failure.FailureSourceIndex,
|
|
}
|
|
|
|
switch failure.Reason {
|
|
|
|
case channeldb.HTLCFailUnknown:
|
|
rpcFailure.Code = lnrpc.Failure_UNKNOWN_FAILURE
|
|
|
|
case channeldb.HTLCFailUnreadable:
|
|
rpcFailure.Code = lnrpc.Failure_UNREADABLE_FAILURE
|
|
|
|
case channeldb.HTLCFailInternal:
|
|
rpcFailure.Code = lnrpc.Failure_INTERNAL_FAILURE
|
|
|
|
case channeldb.HTLCFailMessage:
|
|
err := marshallWireError(failure.Message, rpcFailure)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
default:
|
|
return nil, errors.New("unknown htlc failure reason")
|
|
}
|
|
|
|
return rpcFailure, nil
|
|
}
|
|
|
|
// MarshalTimeNano converts a time.Time into its nanosecond representation. If
|
|
// the time is zero, this method simply returns 0, since calling UnixNano() on a
|
|
// zero-valued time is undefined.
|
|
func MarshalTimeNano(t time.Time) int64 {
|
|
if t.IsZero() {
|
|
return 0
|
|
}
|
|
return t.UnixNano()
|
|
}
|
|
|
|
// marshallError marshall an error as received from the switch to rpc structs
|
|
// suitable for returning to the caller of an rpc method.
|
|
//
|
|
// Because of difficulties with using protobuf oneof constructs in some
|
|
// languages, the decision was made here to use a single message format for all
|
|
// failure messages with some fields left empty depending on the failure type.
|
|
func marshallError(sendError error) (*lnrpc.Failure, error) {
|
|
response := &lnrpc.Failure{}
|
|
|
|
if sendError == htlcswitch.ErrUnreadableFailureMessage {
|
|
response.Code = lnrpc.Failure_UNREADABLE_FAILURE
|
|
return response, nil
|
|
}
|
|
|
|
rtErr, ok := sendError.(htlcswitch.ClearTextError)
|
|
if !ok {
|
|
return nil, sendError
|
|
}
|
|
|
|
err := marshallWireError(rtErr.WireMessage(), response)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// If the ClearTextError received is a ForwardingError, the error
|
|
// originated from a node along the route, not locally on our outgoing
|
|
// link. We set failureSourceIdx to the index of the node where the
|
|
// failure occurred. If the error is not a ForwardingError, the failure
|
|
// occurred at our node, so we leave the index as 0 to indicate that
|
|
// we failed locally.
|
|
fErr, ok := rtErr.(*htlcswitch.ForwardingError)
|
|
if ok {
|
|
response.FailureSourceIndex = uint32(fErr.FailureSourceIdx)
|
|
}
|
|
|
|
return response, nil
|
|
}
|
|
|
|
// marshallError marshall an error as received from the switch to rpc structs
|
|
// suitable for returning to the caller of an rpc method.
|
|
//
|
|
// Because of difficulties with using protobuf oneof constructs in some
|
|
// languages, the decision was made here to use a single message format for all
|
|
// failure messages with some fields left empty depending on the failure type.
|
|
func marshallWireError(msg lnwire.FailureMessage,
|
|
response *lnrpc.Failure) error {
|
|
|
|
switch onionErr := msg.(type) {
|
|
|
|
case *lnwire.FailIncorrectDetails:
|
|
response.Code = lnrpc.Failure_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS
|
|
response.Height = onionErr.Height()
|
|
|
|
case *lnwire.FailIncorrectPaymentAmount:
|
|
response.Code = lnrpc.Failure_INCORRECT_PAYMENT_AMOUNT
|
|
|
|
case *lnwire.FailFinalIncorrectCltvExpiry:
|
|
response.Code = lnrpc.Failure_FINAL_INCORRECT_CLTV_EXPIRY
|
|
response.CltvExpiry = onionErr.CltvExpiry
|
|
|
|
case *lnwire.FailFinalIncorrectHtlcAmount:
|
|
response.Code = lnrpc.Failure_FINAL_INCORRECT_HTLC_AMOUNT
|
|
response.HtlcMsat = uint64(onionErr.IncomingHTLCAmount)
|
|
|
|
case *lnwire.FailFinalExpiryTooSoon:
|
|
response.Code = lnrpc.Failure_FINAL_EXPIRY_TOO_SOON
|
|
|
|
case *lnwire.FailInvalidRealm:
|
|
response.Code = lnrpc.Failure_INVALID_REALM
|
|
|
|
case *lnwire.FailExpiryTooSoon:
|
|
response.Code = lnrpc.Failure_EXPIRY_TOO_SOON
|
|
response.ChannelUpdate = marshallChannelUpdate(&onionErr.Update)
|
|
|
|
case *lnwire.FailExpiryTooFar:
|
|
response.Code = lnrpc.Failure_EXPIRY_TOO_FAR
|
|
|
|
case *lnwire.FailInvalidOnionVersion:
|
|
response.Code = lnrpc.Failure_INVALID_ONION_VERSION
|
|
response.OnionSha_256 = onionErr.OnionSHA256[:]
|
|
|
|
case *lnwire.FailInvalidOnionHmac:
|
|
response.Code = lnrpc.Failure_INVALID_ONION_HMAC
|
|
response.OnionSha_256 = onionErr.OnionSHA256[:]
|
|
|
|
case *lnwire.FailInvalidOnionKey:
|
|
response.Code = lnrpc.Failure_INVALID_ONION_KEY
|
|
response.OnionSha_256 = onionErr.OnionSHA256[:]
|
|
|
|
case *lnwire.FailAmountBelowMinimum:
|
|
response.Code = lnrpc.Failure_AMOUNT_BELOW_MINIMUM
|
|
response.ChannelUpdate = marshallChannelUpdate(&onionErr.Update)
|
|
response.HtlcMsat = uint64(onionErr.HtlcMsat)
|
|
|
|
case *lnwire.FailFeeInsufficient:
|
|
response.Code = lnrpc.Failure_FEE_INSUFFICIENT
|
|
response.ChannelUpdate = marshallChannelUpdate(&onionErr.Update)
|
|
response.HtlcMsat = uint64(onionErr.HtlcMsat)
|
|
|
|
case *lnwire.FailIncorrectCltvExpiry:
|
|
response.Code = lnrpc.Failure_INCORRECT_CLTV_EXPIRY
|
|
response.ChannelUpdate = marshallChannelUpdate(&onionErr.Update)
|
|
response.CltvExpiry = onionErr.CltvExpiry
|
|
|
|
case *lnwire.FailChannelDisabled:
|
|
response.Code = lnrpc.Failure_CHANNEL_DISABLED
|
|
response.ChannelUpdate = marshallChannelUpdate(&onionErr.Update)
|
|
response.Flags = uint32(onionErr.Flags)
|
|
|
|
case *lnwire.FailTemporaryChannelFailure:
|
|
response.Code = lnrpc.Failure_TEMPORARY_CHANNEL_FAILURE
|
|
response.ChannelUpdate = marshallChannelUpdate(onionErr.Update)
|
|
|
|
case *lnwire.FailRequiredNodeFeatureMissing:
|
|
response.Code = lnrpc.Failure_REQUIRED_NODE_FEATURE_MISSING
|
|
|
|
case *lnwire.FailRequiredChannelFeatureMissing:
|
|
response.Code = lnrpc.Failure_REQUIRED_CHANNEL_FEATURE_MISSING
|
|
|
|
case *lnwire.FailUnknownNextPeer:
|
|
response.Code = lnrpc.Failure_UNKNOWN_NEXT_PEER
|
|
|
|
case *lnwire.FailTemporaryNodeFailure:
|
|
response.Code = lnrpc.Failure_TEMPORARY_NODE_FAILURE
|
|
|
|
case *lnwire.FailPermanentNodeFailure:
|
|
response.Code = lnrpc.Failure_PERMANENT_NODE_FAILURE
|
|
|
|
case *lnwire.FailPermanentChannelFailure:
|
|
response.Code = lnrpc.Failure_PERMANENT_CHANNEL_FAILURE
|
|
|
|
case *lnwire.FailMPPTimeout:
|
|
response.Code = lnrpc.Failure_MPP_TIMEOUT
|
|
|
|
case nil:
|
|
response.Code = lnrpc.Failure_UNKNOWN_FAILURE
|
|
|
|
default:
|
|
return fmt.Errorf("cannot marshall failure %T", onionErr)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// marshallChannelUpdate marshalls a channel update as received over the wire to
|
|
// the router rpc format.
|
|
func marshallChannelUpdate(update *lnwire.ChannelUpdate) *lnrpc.ChannelUpdate {
|
|
if update == nil {
|
|
return nil
|
|
}
|
|
|
|
return &lnrpc.ChannelUpdate{
|
|
Signature: update.Signature[:],
|
|
ChainHash: update.ChainHash[:],
|
|
ChanId: update.ShortChannelID.ToUint64(),
|
|
Timestamp: update.Timestamp,
|
|
MessageFlags: uint32(update.MessageFlags),
|
|
ChannelFlags: uint32(update.ChannelFlags),
|
|
TimeLockDelta: uint32(update.TimeLockDelta),
|
|
HtlcMinimumMsat: uint64(update.HtlcMinimumMsat),
|
|
BaseFee: update.BaseFee,
|
|
FeeRate: update.FeeRate,
|
|
HtlcMaximumMsat: uint64(update.HtlcMaximumMsat),
|
|
ExtraOpaqueData: update.ExtraOpaqueData,
|
|
}
|
|
}
|
|
|
|
// MarshallPayment marshall a payment to its rpc representation.
|
|
func (r *RouterBackend) MarshallPayment(payment *channeldb.MPPayment) (
|
|
*lnrpc.Payment, error) {
|
|
|
|
// Fetch the payment's route and preimage. If no HTLC was
|
|
// successful, an empty route and preimage will be used.
|
|
var (
|
|
route route.Route
|
|
preimage lntypes.Preimage
|
|
)
|
|
for _, htlc := range payment.HTLCs {
|
|
// Display the last route attempted.
|
|
route = htlc.Route
|
|
|
|
// If any of the htlcs have settled, extract a valid
|
|
// preimage.
|
|
if htlc.Settle != nil {
|
|
preimage = htlc.Settle.Preimage
|
|
}
|
|
}
|
|
|
|
// Encode the hops from the successful route, if any.
|
|
path := make([]string, len(route.Hops))
|
|
for i, hop := range route.Hops {
|
|
path[i] = hex.EncodeToString(hop.PubKeyBytes[:])
|
|
}
|
|
|
|
msatValue := int64(payment.Info.Value)
|
|
satValue := int64(payment.Info.Value.ToSatoshis())
|
|
|
|
status, err := convertPaymentStatus(payment.Status)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
htlcs := make([]*lnrpc.HTLCAttempt, 0, len(payment.HTLCs))
|
|
for _, dbHTLC := range payment.HTLCs {
|
|
htlc, err := r.MarshalHTLCAttempt(dbHTLC)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
htlcs = append(htlcs, htlc)
|
|
}
|
|
|
|
paymentHash := payment.Info.PaymentHash
|
|
creationTimeNS := MarshalTimeNano(payment.Info.CreationTime)
|
|
|
|
failureReason, err := marshallPaymentFailureReason(
|
|
payment.FailureReason,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &lnrpc.Payment{
|
|
PaymentHash: hex.EncodeToString(paymentHash[:]),
|
|
Value: satValue,
|
|
ValueMsat: msatValue,
|
|
ValueSat: satValue,
|
|
CreationDate: payment.Info.CreationTime.Unix(),
|
|
CreationTimeNs: creationTimeNS,
|
|
Path: path,
|
|
Fee: int64(route.TotalFees().ToSatoshis()),
|
|
FeeSat: int64(route.TotalFees().ToSatoshis()),
|
|
FeeMsat: int64(route.TotalFees()),
|
|
PaymentPreimage: hex.EncodeToString(preimage[:]),
|
|
PaymentRequest: string(payment.Info.PaymentRequest),
|
|
Status: status,
|
|
Htlcs: htlcs,
|
|
PaymentIndex: payment.SequenceNum,
|
|
FailureReason: failureReason,
|
|
}, nil
|
|
}
|
|
|
|
// convertPaymentStatus converts a channeldb.PaymentStatus to the type expected
|
|
// by the RPC.
|
|
func convertPaymentStatus(dbStatus channeldb.PaymentStatus) (
|
|
lnrpc.Payment_PaymentStatus, error) {
|
|
|
|
switch dbStatus {
|
|
case channeldb.StatusUnknown:
|
|
return lnrpc.Payment_UNKNOWN, nil
|
|
|
|
case channeldb.StatusInFlight:
|
|
return lnrpc.Payment_IN_FLIGHT, nil
|
|
|
|
case channeldb.StatusSucceeded:
|
|
return lnrpc.Payment_SUCCEEDED, nil
|
|
|
|
case channeldb.StatusFailed:
|
|
return lnrpc.Payment_FAILED, nil
|
|
|
|
default:
|
|
return 0, fmt.Errorf("unhandled payment status %v", dbStatus)
|
|
}
|
|
}
|
|
|
|
// marshallPaymentFailureReason marshalls the failure reason to the corresponding rpc
|
|
// type.
|
|
func marshallPaymentFailureReason(reason *channeldb.FailureReason) (
|
|
lnrpc.PaymentFailureReason, error) {
|
|
|
|
if reason == nil {
|
|
return lnrpc.PaymentFailureReason_FAILURE_REASON_NONE, nil
|
|
}
|
|
|
|
switch *reason {
|
|
|
|
case channeldb.FailureReasonTimeout:
|
|
return lnrpc.PaymentFailureReason_FAILURE_REASON_TIMEOUT, nil
|
|
|
|
case channeldb.FailureReasonNoRoute:
|
|
return lnrpc.PaymentFailureReason_FAILURE_REASON_NO_ROUTE, nil
|
|
|
|
case channeldb.FailureReasonError:
|
|
return lnrpc.PaymentFailureReason_FAILURE_REASON_ERROR, nil
|
|
|
|
case channeldb.FailureReasonPaymentDetails:
|
|
return lnrpc.PaymentFailureReason_FAILURE_REASON_INCORRECT_PAYMENT_DETAILS, nil
|
|
|
|
case channeldb.FailureReasonInsufficientBalance:
|
|
return lnrpc.PaymentFailureReason_FAILURE_REASON_INSUFFICIENT_BALANCE, nil
|
|
}
|
|
|
|
return 0, errors.New("unknown failure reason")
|
|
}
|