7408aa6c8d
Run go fmt so config file is formatted correctly. Also rename newVertex to NewVertex in pathfind_test and notifications_test as it is now exported from the routing package.
857 lines
26 KiB
Go
857 lines
26 KiB
Go
package routing
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import (
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"bytes"
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"encoding/binary"
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"encoding/hex"
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"encoding/json"
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"errors"
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"io/ioutil"
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"math/big"
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"net"
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"os"
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"strings"
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"testing"
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"time"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/roasbeef/btcd/btcec"
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"github.com/roasbeef/btcd/chaincfg/chainhash"
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"github.com/roasbeef/btcd/wire"
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"github.com/roasbeef/btcutil"
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prand "math/rand"
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)
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const (
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// basicGraphFilePath is the file path for a basic graph used within
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// the tests. The basic graph consists of 5 nodes with 5 channels
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// connecting them.
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basicGraphFilePath = "testdata/basic_graph.json"
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// excessiveHopsGraphFilePath is a file path which stores the JSON dump
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// of a graph which was previously triggering an erroneous excessive
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// hops error. The error has since been fixed, but a test case
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// exercising it is kept around to guard against regressions.
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excessiveHopsGraphFilePath = "testdata/excessive_hops.json"
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// specExampleFilePath is a file path which stores an example which
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// implementations will use in order to ensure that they're calculating
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// the payload for each hop in path properly.
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specExampleFilePath = "testdata/spec_example.json"
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)
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var (
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randSource = prand.NewSource(time.Now().Unix())
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randInts = prand.New(randSource)
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testSig = &btcec.Signature{
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R: new(big.Int),
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S: new(big.Int),
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}
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_, _ = testSig.R.SetString("63724406601629180062774974542967536251589935445068131219452686511677818569431", 10)
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_, _ = testSig.S.SetString("18801056069249825825291287104931333862866033135609736119018462340006816851118", 10)
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testAuthProof = channeldb.ChannelAuthProof{
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NodeSig1: testSig,
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NodeSig2: testSig,
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BitcoinSig1: testSig,
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BitcoinSig2: testSig,
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}
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)
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// testGraph is the struct which corresponds to the JSON format used to encode
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// graphs within the files in the testdata directory.
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//
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// TODO(roasbeef): add test graph auto-generator
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type testGraph struct {
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Info []string `json:"info"`
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Nodes []testNode `json:"nodes"`
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Edges []testChan `json:"edges"`
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}
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// testNode represents a node within the test graph above. We skip certain
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// information such as the node's IP address as that information isn't needed
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// for our tests.
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type testNode struct {
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Source bool `json:"source"`
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PubKey string `json:"pubkey"`
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Alias string `json:"alias"`
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}
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// testChan represents the JSON version of a payment channel. This struct
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// matches the Json that's encoded under the "edges" key within the test graph.
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type testChan struct {
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Node1 string `json:"node_1"`
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Node2 string `json:"node_2"`
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ChannelID uint64 `json:"channel_id"`
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ChannelPoint string `json:"channel_point"`
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Flags uint16 `json:"flags"`
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Expiry uint16 `json:"expiry"`
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MinHTLC int64 `json:"min_htlc"`
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FeeBaseMsat int64 `json:"fee_base_msat"`
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FeeRate int64 `json:"fee_rate"`
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Capacity int64 `json:"capacity"`
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}
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// makeTestGraph creates a new instance of a channeldb.ChannelGraph for testing
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// purposes. A callback which cleans up the created temporary directories is
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// also returned and intended to be executed after the test completes.
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func makeTestGraph() (*channeldb.ChannelGraph, func(), error) {
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// First, create a temporary directory to be used for the duration of
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// this test.
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tempDirName, err := ioutil.TempDir("", "channeldb")
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if err != nil {
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return nil, nil, err
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}
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// Next, create channeldb for the first time.
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cdb, err := channeldb.Open(tempDirName)
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if err != nil {
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return nil, nil, err
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}
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cleanUp := func() {
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cdb.Close()
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os.RemoveAll(tempDirName)
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}
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return cdb.ChannelGraph(), cleanUp, nil
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}
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// aliasMap is a map from a node's alias to its public key. This type is
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// provided in order to allow easily look up from the human rememberable alias
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// to an exact node's public key.
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type aliasMap map[string]*btcec.PublicKey
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// parseTestGraph returns a fully populated ChannelGraph given a path to a JSON
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// file which encodes a test graph.
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func parseTestGraph(path string) (*channeldb.ChannelGraph, func(), aliasMap, error) {
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graphJSON, err := ioutil.ReadFile(path)
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if err != nil {
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return nil, nil, nil, err
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}
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// First unmarshal the JSON graph into an instance of the testGraph
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// struct. Using the struct tags created above in the struct, the JSON
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// will be properly parsed into the struct above.
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var g testGraph
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if err := json.Unmarshal(graphJSON, &g); err != nil {
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return nil, nil, nil, err
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}
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// We'll use this fake address for the IP address of all the nodes in
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// our tests. This value isn't needed for path finding so it doesn't
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// need to be unique.
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var testAddrs []net.Addr
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testAddr, err := net.ResolveTCPAddr("tcp", "192.0.0.1:8888")
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if err != nil {
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return nil, nil, nil, err
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}
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testAddrs = append(testAddrs, testAddr)
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// Next, create a temporary graph database for usage within the test.
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graph, cleanUp, err := makeTestGraph()
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if err != nil {
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return nil, nil, nil, err
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}
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aliasMap := make(map[string]*btcec.PublicKey)
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var source *channeldb.LightningNode
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// First we insert all the nodes within the graph as vertexes.
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for _, node := range g.Nodes {
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pubBytes, err := hex.DecodeString(node.PubKey)
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if err != nil {
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return nil, nil, nil, err
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}
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pub, err := btcec.ParsePubKey(pubBytes, btcec.S256())
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if err != nil {
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return nil, nil, nil, err
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}
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dbNode := &channeldb.LightningNode{
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HaveNodeAnnouncement: true,
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AuthSig: testSig,
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LastUpdate: time.Now(),
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Addresses: testAddrs,
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PubKey: pub,
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Alias: node.Alias,
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Features: testFeatures,
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}
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// We require all aliases within the graph to be unique for our
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// tests.
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if _, ok := aliasMap[node.Alias]; ok {
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return nil, nil, nil, errors.New("aliases for nodes " +
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"must be unique!")
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}
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// If the alias is unique, then add the node to the
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// alias map for easy lookup.
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aliasMap[node.Alias] = pub
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// If the node is tagged as the source, then we create a
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// pointer to is so we can mark the source in the graph
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// properly.
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if node.Source {
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// If we come across a node that's marked as the
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// source, and we've already set the source in a prior
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// iteration, then the JSON has an error as only ONE
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// node can be the source in the graph.
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if source != nil {
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return nil, nil, nil, errors.New("JSON is invalid " +
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"multiple nodes are tagged as the source")
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}
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source = dbNode
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}
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// With the node fully parsed, add it as a vertex within the
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// graph.
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if err := graph.AddLightningNode(dbNode); err != nil {
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return nil, nil, nil, err
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}
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}
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if source != nil {
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// Set the selected source node
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if err := graph.SetSourceNode(source); err != nil {
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return nil, nil, nil, err
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}
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}
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// With all the vertexes inserted, we can now insert the edges into the
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// test graph.
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for _, edge := range g.Edges {
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node1Bytes, err := hex.DecodeString(edge.Node1)
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if err != nil {
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return nil, nil, nil, err
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}
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node1Pub, err := btcec.ParsePubKey(node1Bytes, btcec.S256())
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if err != nil {
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return nil, nil, nil, err
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}
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node2Bytes, err := hex.DecodeString(edge.Node2)
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if err != nil {
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return nil, nil, nil, err
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}
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node2Pub, err := btcec.ParsePubKey(node2Bytes, btcec.S256())
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if err != nil {
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return nil, nil, nil, err
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}
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fundingTXID := strings.Split(edge.ChannelPoint, ":")[0]
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txidBytes, err := chainhash.NewHashFromStr(fundingTXID)
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if err != nil {
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return nil, nil, nil, err
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}
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fundingPoint := wire.OutPoint{
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Hash: *txidBytes,
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Index: 0,
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}
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// We first insert the existence of the edge between the two
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// nodes.
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edgeInfo := channeldb.ChannelEdgeInfo{
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ChannelID: edge.ChannelID,
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NodeKey1: node1Pub,
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NodeKey2: node2Pub,
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BitcoinKey1: node1Pub,
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BitcoinKey2: node2Pub,
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AuthProof: &testAuthProof,
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ChannelPoint: fundingPoint,
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Capacity: btcutil.Amount(edge.Capacity),
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}
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err = graph.AddChannelEdge(&edgeInfo)
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if err != nil && err != channeldb.ErrEdgeAlreadyExist {
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return nil, nil, nil, err
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}
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edgePolicy := &channeldb.ChannelEdgePolicy{
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Signature: testSig,
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Flags: edge.Flags,
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ChannelID: edge.ChannelID,
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LastUpdate: time.Now(),
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TimeLockDelta: edge.Expiry,
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MinHTLC: lnwire.MilliSatoshi(edge.MinHTLC),
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FeeBaseMSat: lnwire.MilliSatoshi(edge.FeeBaseMsat),
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FeeProportionalMillionths: lnwire.MilliSatoshi(edge.FeeRate),
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}
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if err := graph.UpdateEdgePolicy(edgePolicy); err != nil {
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return nil, nil, nil, err
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}
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}
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return graph, cleanUp, aliasMap, nil
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}
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func TestBasicGraphPathFinding(t *testing.T) {
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t.Parallel()
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graph, cleanUp, aliases, err := parseTestGraph(basicGraphFilePath)
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defer cleanUp()
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if err != nil {
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t.Fatalf("unable to create graph: %v", err)
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}
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sourceNode, err := graph.SourceNode()
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if err != nil {
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t.Fatalf("unable to fetch source node: %v", err)
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}
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sourceVertex := NewVertex(sourceNode.PubKey)
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ignoredEdges := make(map[uint64]struct{})
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ignoredVertexes := make(map[Vertex]struct{})
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// With the test graph loaded, we'll test some basic path finding using
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// the pre-generated graph. Consult the testdata/basic_graph.json file
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// to follow along with the assumptions we'll use to test the path
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// finding.
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const (
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startingHeight = 100
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finalHopCLTV = 1
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)
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paymentAmt := lnwire.NewMSatFromSatoshis(100)
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target := aliases["sophon"]
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path, err := findPath(nil, graph, sourceNode, target, ignoredVertexes,
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ignoredEdges, paymentAmt)
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if err != nil {
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t.Fatalf("unable to find path: %v", err)
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}
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route, err := newRoute(paymentAmt, sourceVertex, path, startingHeight,
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finalHopCLTV)
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if err != nil {
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t.Fatalf("unable to create path: %v", err)
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}
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// The length of the route selected should be of exactly length two.
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if len(route.Hops) != 2 {
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t.Fatalf("route is of incorrect length, expected %v got %v", 2,
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len(route.Hops))
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}
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// As each hop only decrements a single block from the time-lock, the
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// total time lock value should two more than our starting block
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// height.
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if route.TotalTimeLock != 102 {
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t.Fatalf("expected time lock of %v, instead have %v", 2,
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route.TotalTimeLock)
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}
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// The first hop in the path should be an edge from roasbeef to goku.
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if !route.Hops[0].Channel.Node.PubKey.IsEqual(aliases["songoku"]) {
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t.Fatalf("first hop should be goku, is instead: %v",
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route.Hops[0].Channel.Node.Alias)
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}
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// The second hop should be from goku to sophon.
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if !route.Hops[1].Channel.Node.PubKey.IsEqual(aliases["sophon"]) {
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t.Fatalf("second hop should be sophon, is instead: %v",
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route.Hops[0].Channel.Node.Alias)
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}
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// Next, we'll assert that the "next hop" field in each route payload
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// properly points to the channel ID that the HTLC should be forwarded
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// along.
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hopPayloads := route.ToHopPayloads()
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if len(hopPayloads) != 2 {
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t.Fatalf("incorrect number of hop payloads: expected %v, got %v",
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2, len(hopPayloads))
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}
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// The first hop should point to the second hop.
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var expectedHop [8]byte
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binary.BigEndian.PutUint64(expectedHop[:], route.Hops[1].Channel.ChannelID)
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if !bytes.Equal(hopPayloads[0].NextAddress[:], expectedHop[:]) {
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t.Fatalf("first hop has incorrect next hop: expected %x, got %x",
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expectedHop[:], hopPayloads[0].NextAddress)
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}
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// The second hop should have a next hop value of all zeroes in order
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// to indicate it's the exit hop.
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var exitHop [8]byte
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if !bytes.Equal(hopPayloads[1].NextAddress[:], exitHop[:]) {
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t.Fatalf("first hop has incorrect next hop: expected %x, got %x",
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exitHop[:], hopPayloads[0].NextAddress)
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}
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// We'll also assert that the outgoing CLTV value for each hop was set
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// accordingly.
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if route.Hops[0].OutgoingTimeLock != 101 {
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t.Fatalf("expected outgoing time-lock of %v, instead have %v",
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1, route.Hops[0].OutgoingTimeLock)
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}
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if route.Hops[1].OutgoingTimeLock != 101 {
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t.Fatalf("outgoing time-lock for final hop is incorrect: "+
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"expected %v, got %v", 1, route.Hops[1].OutgoingTimeLock)
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}
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// Additionally, we'll ensure that the amount to forward, and fees
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// computed for each hop are correct.
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firstHopFee := computeFee(paymentAmt, route.Hops[1].Channel)
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if route.Hops[0].Fee != firstHopFee {
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t.Fatalf("first hop fee incorrect: expected %v, got %v",
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firstHopFee, route.Hops[0].Fee)
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}
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if route.TotalAmount != paymentAmt+firstHopFee {
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t.Fatalf("first hop forwarding amount incorrect: expected %v, got %v",
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paymentAmt+firstHopFee, route.TotalAmount)
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}
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if route.Hops[1].Fee != 0 {
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t.Fatalf("first hop fee incorrect: expected %v, got %v",
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firstHopFee, 0)
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}
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if route.Hops[1].AmtToForward != paymentAmt {
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t.Fatalf("second hop forwarding amount incorrect: expected %v, got %v",
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paymentAmt+firstHopFee, route.Hops[1].AmtToForward)
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}
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// Next, attempt to query for a path to Luo Ji for 100 satoshis, there
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// exist two possible paths in the graph, but the shorter (1 hop) path
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// should be selected.
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target = aliases["luoji"]
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path, err = findPath(nil, graph, sourceNode, target, ignoredVertexes,
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ignoredEdges, paymentAmt)
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if err != nil {
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t.Fatalf("unable to find route: %v", err)
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}
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route, err = newRoute(paymentAmt, sourceVertex, path, startingHeight,
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finalHopCLTV)
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if err != nil {
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t.Fatalf("unable to create path: %v", err)
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}
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// The length of the path should be exactly one hop as it's the
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// "shortest" known path in the graph.
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if len(route.Hops) != 1 {
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t.Fatalf("shortest path not selected, should be of length 1, "+
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"is instead: %v", len(route.Hops))
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}
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// As we have a direct path, the total time lock value should be
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// exactly the current block height plus one.
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if route.TotalTimeLock != 101 {
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t.Fatalf("expected time lock of %v, instead have %v", 1,
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route.TotalTimeLock)
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}
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// Additionally, since this is a single-hop payment, we shouldn't have
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// to pay any fees in total, so the total amount should be the payment
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// amount.
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if route.TotalAmount != paymentAmt {
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t.Fatalf("incorrect total amount, expected %v got %v",
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paymentAmt, route.TotalAmount)
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}
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}
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func TestKShortestPathFinding(t *testing.T) {
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t.Parallel()
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graph, cleanUp, aliases, err := parseTestGraph(basicGraphFilePath)
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defer cleanUp()
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if err != nil {
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t.Fatalf("unable to create graph: %v", err)
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}
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sourceNode, err := graph.SourceNode()
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if err != nil {
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t.Fatalf("unable to fetch source node: %v", err)
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}
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// In this test we'd like to ensure that our algoirthm to find the
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// k-shortest paths from a given source node to any destination node
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// works as exepcted.
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// In our basic_graph.json, there exist two paths from roasbeef to luo
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// ji. Our algorithm should properly find both paths, and also rank
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// them in order of their total "distance".
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paymentAmt := lnwire.NewMSatFromSatoshis(100)
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target := aliases["luoji"]
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paths, err := findPaths(nil, graph, sourceNode, target, paymentAmt)
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if err != nil {
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t.Fatalf("unable to find paths between roasbeef and "+
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"luo ji: %v", err)
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}
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// The algorithm should've found two paths from roasbeef to luo ji.
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if len(paths) != 2 {
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t.Fatalf("two path shouldn't been found, instead %v were",
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len(paths))
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}
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// Additinoally, the total hop length of the first path returned should
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// be _less_ than that of the second path returned.
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if len(paths[0]) > len(paths[1]) {
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t.Fatalf("paths found not ordered properly")
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}
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// Finally, we'll assert the exact expected ordering of both paths
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// found.
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assertExpectedPath := func(path []*ChannelHop, nodeAliases ...string) {
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|
for i, hop := range path {
|
|
if hop.Node.Alias != nodeAliases[i] {
|
|
t.Fatalf("expected %v to be pos #%v in hop, "+
|
|
"instead %v was", nodeAliases[i], i,
|
|
hop.Node.Alias)
|
|
}
|
|
}
|
|
}
|
|
|
|
// The first route should be a direct route to luo ji.
|
|
assertExpectedPath(paths[0], "roasbeef", "luoji")
|
|
|
|
// The second route should be a route to luo ji via satoshi.
|
|
assertExpectedPath(paths[1], "roasbeef", "satoshi", "luoji")
|
|
}
|
|
|
|
func TestNewRoutePathTooLong(t *testing.T) {
|
|
t.Skip()
|
|
|
|
// Ensure that potential paths which are over the maximum hop-limit are
|
|
// rejected.
|
|
graph, cleanUp, aliases, err := parseTestGraph(excessiveHopsGraphFilePath)
|
|
defer cleanUp()
|
|
if err != nil {
|
|
t.Fatalf("unable to create graph: %v", err)
|
|
}
|
|
|
|
sourceNode, err := graph.SourceNode()
|
|
if err != nil {
|
|
t.Fatalf("unable to fetch source node: %v", err)
|
|
}
|
|
|
|
ignoredEdges := make(map[uint64]struct{})
|
|
ignoredVertexes := make(map[Vertex]struct{})
|
|
|
|
paymentAmt := lnwire.NewMSatFromSatoshis(100)
|
|
|
|
// We start by confirminig that routing a payment 20 hops away is possible.
|
|
// Alice should be able to find a valid route to ursula.
|
|
target := aliases["ursula"]
|
|
_, err = findPath(nil, graph, sourceNode, target, ignoredVertexes,
|
|
ignoredEdges, paymentAmt)
|
|
if err != nil {
|
|
t.Fatalf("path should have been found")
|
|
}
|
|
|
|
// Vincent is 21 hops away from Alice, and thus no valid route should be
|
|
// presented to Alice.
|
|
target = aliases["vincent"]
|
|
path, err := findPath(nil, graph, sourceNode, target, ignoredVertexes,
|
|
ignoredEdges, paymentAmt)
|
|
if err == nil {
|
|
t.Fatalf("should not have been able to find path, supposed to be "+
|
|
"greater than 20 hops, found route with %v hops",
|
|
len(path))
|
|
}
|
|
|
|
}
|
|
|
|
func TestPathNotAvailable(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
graph, cleanUp, _, err := parseTestGraph(basicGraphFilePath)
|
|
defer cleanUp()
|
|
if err != nil {
|
|
t.Fatalf("unable to create graph: %v", err)
|
|
}
|
|
|
|
sourceNode, err := graph.SourceNode()
|
|
if err != nil {
|
|
t.Fatalf("unable to fetch source node: %v", err)
|
|
}
|
|
|
|
ignoredEdges := make(map[uint64]struct{})
|
|
ignoredVertexes := make(map[Vertex]struct{})
|
|
|
|
// With the test graph loaded, we'll test that queries for target that
|
|
// are either unreachable within the graph, or unknown result in an
|
|
// error.
|
|
unknownNodeStr := "03dd46ff29a6941b4a2607525b043ec9b020b3f318a1bf281536fd7011ec59c882"
|
|
unknownNodeBytes, err := hex.DecodeString(unknownNodeStr)
|
|
if err != nil {
|
|
t.Fatalf("unable to parse bytes: %v", err)
|
|
}
|
|
unknownNode, err := btcec.ParsePubKey(unknownNodeBytes, btcec.S256())
|
|
if err != nil {
|
|
t.Fatalf("unable to parse pubkey: %v", err)
|
|
}
|
|
|
|
_, err = findPath(nil, graph, sourceNode, unknownNode, ignoredVertexes,
|
|
ignoredEdges, 100)
|
|
if !IsError(err, ErrNoPathFound) {
|
|
t.Fatalf("path shouldn't have been found: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestPathInsufficientCapacity(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
graph, cleanUp, aliases, err := parseTestGraph(basicGraphFilePath)
|
|
defer cleanUp()
|
|
if err != nil {
|
|
t.Fatalf("unable to create graph: %v", err)
|
|
}
|
|
|
|
sourceNode, err := graph.SourceNode()
|
|
if err != nil {
|
|
t.Fatalf("unable to fetch source node: %v", err)
|
|
}
|
|
ignoredEdges := make(map[uint64]struct{})
|
|
ignoredVertexes := make(map[Vertex]struct{})
|
|
|
|
// Next, test that attempting to find a path in which the current
|
|
// channel graph cannot support due to insufficient capacity triggers
|
|
// an error.
|
|
|
|
// To test his we'll attempt to make a payment of 1 BTC, or 100 million
|
|
// satoshis. The largest channel in the basic graph is of size 100k
|
|
// satoshis, so we shouldn't be able to find a path to sophon even
|
|
// though we have a 2-hop link.
|
|
target := aliases["sophon"]
|
|
|
|
const payAmt = btcutil.SatoshiPerBitcoin
|
|
_, err = findPath(nil, graph, sourceNode, target, ignoredVertexes,
|
|
ignoredEdges, payAmt)
|
|
if !IsError(err, ErrNoPathFound) {
|
|
t.Fatalf("graph shouldn't be able to support payment: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestPathInsufficientCapacityWithFee(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// TODO(roasbeef): encode live graph to json
|
|
|
|
// TODO(roasbeef): need to add a case, or modify the fee ratio for one
|
|
// to ensure that has going forward, but when fees are applied doesn't
|
|
// work
|
|
}
|
|
|
|
func TestPathFindSpecExample(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// All our path finding tests will assume a starting height of 100, so
|
|
// we'll pass that in to ensure that the router uses 100 as the current
|
|
// height.
|
|
const startingHeight = 100
|
|
ctx, cleanUp, err := createTestCtx(startingHeight, specExampleFilePath)
|
|
defer cleanUp()
|
|
if err != nil {
|
|
t.Fatalf("unable to create router: %v", err)
|
|
}
|
|
|
|
const (
|
|
aliceFinalCLTV = 10
|
|
bobFinalCLTV = 20
|
|
carolFinalCLTV = 30
|
|
daveFinalCLTV = 40
|
|
)
|
|
|
|
// We'll first exercise the scenario of a direct payment from Bob to
|
|
// Carol, so we set "B" as the source node so path finding starts from
|
|
// Bob.
|
|
bob := ctx.aliases["B"]
|
|
bobNode, err := ctx.graph.FetchLightningNode(bob)
|
|
if err != nil {
|
|
t.Fatalf("unable to find bob: %v", err)
|
|
}
|
|
if err := ctx.graph.SetSourceNode(bobNode); err != nil {
|
|
t.Fatalf("unable to set source node: %v", err)
|
|
}
|
|
|
|
// Query for a route of 4,999,999 mSAT to carol.
|
|
carol := ctx.aliases["C"]
|
|
const amt lnwire.MilliSatoshi = 4999999
|
|
routes, err := ctx.router.FindRoutes(carol, amt)
|
|
if err != nil {
|
|
t.Fatalf("unable to find route: %v", err)
|
|
}
|
|
|
|
// We should come back with _exactly_ two routes.
|
|
if len(routes) != 2 {
|
|
t.Fatalf("expected %v routes, instead have: %v", 2,
|
|
len(routes))
|
|
}
|
|
|
|
// Now we'll examine the first route returned for correctness.
|
|
//
|
|
// It should be sending the exact payment amount as there're no
|
|
// additional hops.
|
|
firstRoute := routes[0]
|
|
if firstRoute.TotalAmount != amt {
|
|
t.Fatalf("wrong total amount: got %v, expected %v",
|
|
firstRoute.TotalAmount, amt)
|
|
}
|
|
if firstRoute.Hops[0].AmtToForward != amt {
|
|
t.Fatalf("wrong forward amount: got %v, expected %v",
|
|
firstRoute.Hops[0].AmtToForward, amt)
|
|
}
|
|
if firstRoute.Hops[0].Fee != 0 {
|
|
t.Fatalf("wrong hop fee: got %v, expected %v",
|
|
firstRoute.Hops[0].Fee, 0)
|
|
}
|
|
|
|
// The CLTV expiry should be the current height plus 9 (the expiry for
|
|
// the B -> C channel.
|
|
if firstRoute.TotalTimeLock !=
|
|
startingHeight+DefaultFinalCLTVDelta {
|
|
|
|
t.Fatalf("wrong total time lock: got %v, expecting %v",
|
|
firstRoute.TotalTimeLock,
|
|
startingHeight+DefaultFinalCLTVDelta)
|
|
}
|
|
|
|
// Next, we'll set A as the source node so we can assert that we create
|
|
// the proper route for any queries starting with Alice.
|
|
alice := ctx.aliases["A"]
|
|
aliceNode, err := ctx.graph.FetchLightningNode(alice)
|
|
if err != nil {
|
|
t.Fatalf("unable to find alice: %v", err)
|
|
}
|
|
if err := ctx.graph.SetSourceNode(aliceNode); err != nil {
|
|
t.Fatalf("unable to set source node: %v", err)
|
|
}
|
|
ctx.router.selfNode = aliceNode
|
|
source, err := ctx.graph.SourceNode()
|
|
if err != nil {
|
|
t.Fatalf("unable to retrieve source node: %v", err)
|
|
}
|
|
if !source.PubKey.IsEqual(alice) {
|
|
t.Fatalf("source node not set")
|
|
}
|
|
|
|
// We'll now request a route from A -> B -> C.
|
|
ctx.router.routeCache = make(map[routeTuple][]*Route)
|
|
routes, err = ctx.router.FindRoutes(carol, amt)
|
|
if err != nil {
|
|
t.Fatalf("unable to find routes: %v", err)
|
|
}
|
|
|
|
// We should come back with _exactly_ two routes.
|
|
if len(routes) != 2 {
|
|
t.Fatalf("expected %v routes, instead have: %v", 2,
|
|
len(routes))
|
|
}
|
|
|
|
// Both routes should be two hops.
|
|
if len(routes[0].Hops) != 2 {
|
|
t.Fatalf("route should be %v hops, is instead %v", 2,
|
|
len(routes[0].Hops))
|
|
}
|
|
if len(routes[1].Hops) != 2 {
|
|
t.Fatalf("route should be %v hops, is instead %v", 2,
|
|
len(routes[1].Hops))
|
|
}
|
|
|
|
// The total amount should factor in a fee of 10199 and also use a CLTV
|
|
// delta total of 29 (20 + 9),
|
|
expectedAmt := lnwire.MilliSatoshi(5010198)
|
|
if routes[0].TotalAmount != expectedAmt {
|
|
t.Fatalf("wrong amount: got %v, expected %v",
|
|
routes[0].TotalAmount, expectedAmt)
|
|
}
|
|
if routes[0].TotalTimeLock != startingHeight+29 {
|
|
t.Fatalf("wrong total time lock: got %v, expecting %v",
|
|
routes[0].TotalTimeLock, startingHeight+29)
|
|
}
|
|
|
|
// Ensure that the hops of the first route are properly crafted.
|
|
//
|
|
// After taking the fee, Bob should be forwarding the remainder which
|
|
// is the exact payment to Bob.
|
|
if routes[0].Hops[0].AmtToForward != amt {
|
|
t.Fatalf("wrong forward amount: got %v, expected %v",
|
|
routes[0].Hops[0].AmtToForward, amt)
|
|
}
|
|
|
|
// We shouldn't pay any fee for the first, hop, but the fee for the
|
|
// second hop posted fee should be exactly:
|
|
|
|
// The fee that we pay for the second hop will be "applied to the first
|
|
// hop, so we should get a fee of exactly:
|
|
//
|
|
// * 200 + 4999999 * 2000 / 1000000 = 10199
|
|
if routes[0].Hops[0].Fee != 10199 {
|
|
t.Fatalf("wrong hop fee: got %v, expected %v",
|
|
routes[0].Hops[0].Fee, 10199)
|
|
}
|
|
|
|
// While for the final hop, as there's no additional hop afterwards, we
|
|
// pay no fee.
|
|
if routes[0].Hops[1].Fee != 0 {
|
|
t.Fatalf("wrong hop fee: got %v, expected %v",
|
|
routes[0].Hops[0].Fee, 0)
|
|
}
|
|
|
|
// The outgoing CLTV value itself should be the current height plus 30
|
|
// to meet Carol's requirements.
|
|
if routes[0].Hops[0].OutgoingTimeLock !=
|
|
startingHeight+DefaultFinalCLTVDelta {
|
|
|
|
t.Fatalf("wrong total time lock: got %v, expecting %v",
|
|
routes[0].Hops[0].OutgoingTimeLock,
|
|
startingHeight+DefaultFinalCLTVDelta)
|
|
}
|
|
|
|
// For B -> C, we assert that the final hop also has the proper
|
|
// parameters.
|
|
lastHop := routes[0].Hops[1]
|
|
if lastHop.AmtToForward != amt {
|
|
t.Fatalf("wrong forward amount: got %v, expected %v",
|
|
lastHop.AmtToForward, amt)
|
|
}
|
|
if lastHop.OutgoingTimeLock !=
|
|
startingHeight+DefaultFinalCLTVDelta {
|
|
|
|
t.Fatalf("wrong total time lock: got %v, expecting %v",
|
|
lastHop.OutgoingTimeLock,
|
|
startingHeight+DefaultFinalCLTVDelta)
|
|
}
|
|
|
|
// We'll also make similar assertions for the second route from A to C
|
|
// via D.
|
|
secondRoute := routes[1]
|
|
expectedAmt = 5020398
|
|
if secondRoute.TotalAmount != expectedAmt {
|
|
t.Fatalf("wrong amount: got %v, expected %v",
|
|
secondRoute.TotalAmount, expectedAmt)
|
|
}
|
|
expectedTimeLock := startingHeight + daveFinalCLTV + DefaultFinalCLTVDelta
|
|
if secondRoute.TotalTimeLock != uint32(expectedTimeLock) {
|
|
t.Fatalf("wrong total time lock: got %v, expecting %v",
|
|
secondRoute.TotalTimeLock, expectedTimeLock)
|
|
}
|
|
onionPayload := secondRoute.Hops[0]
|
|
if onionPayload.AmtToForward != amt {
|
|
t.Fatalf("wrong forward amount: got %v, expected %v",
|
|
onionPayload.AmtToForward, amt)
|
|
}
|
|
expectedTimeLock = startingHeight + DefaultFinalCLTVDelta
|
|
if onionPayload.OutgoingTimeLock != uint32(expectedTimeLock) {
|
|
t.Fatalf("wrong outgoing time lock: got %v, expecting %v",
|
|
onionPayload.OutgoingTimeLock,
|
|
expectedTimeLock)
|
|
}
|
|
|
|
// The B -> C hop should also be identical as the prior cases.
|
|
lastHop = secondRoute.Hops[1]
|
|
if lastHop.AmtToForward != amt {
|
|
t.Fatalf("wrong forward amount: got %v, expected %v",
|
|
lastHop.AmtToForward, amt)
|
|
}
|
|
if lastHop.OutgoingTimeLock !=
|
|
startingHeight+DefaultFinalCLTVDelta {
|
|
|
|
t.Fatalf("wrong total time lock: got %v, expecting %v",
|
|
lastHop.OutgoingTimeLock,
|
|
startingHeight+DefaultFinalCLTVDelta)
|
|
}
|
|
}
|