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api_rest.go
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api_rest.go
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package lightningapi
import (
"context"
"fmt"
"net/http"
"strconv"
"time"
entities "github.com/bolt-observer/go_common/entities"
"github.com/golang/glog"
)
// LndRestLightningAPI struct
type LndRestLightningAPI struct {
Request *http.Request
Transport *http.Transport
HTTPAPI *HTTPAPI
LightningAPI
}
// Compile time check for the interface
var _ LightingAPICalls = &LndRestLightningAPI{}
// NewLndRestLightningAPI constructs new lightning API
func NewLndRestLightningAPI(getData GetDataCall) LightingAPICalls {
api := NewHTTPAPI()
request, transport, err := api.GetHTTPRequest(getData)
if err != nil {
glog.Warningf("Failed to get client: %v", err)
return nil
}
api.SetTransport(transport)
return &LndRestLightningAPI{
Request: request,
Transport: transport,
HTTPAPI: api,
LightningAPI: LightningAPI{GetNodeInfoFullThreshUseDescribeGraph: 500},
}
}
// GetInfo - GetInfo API
func (l *LndRestLightningAPI) GetInfo(ctx context.Context) (*InfoAPI, error) {
resp, err := l.HTTPAPI.HTTPGetInfo(ctx, l.Request, l.Transport)
if err != nil {
return nil, err
}
ret := &InfoAPI{
Alias: resp.Alias,
IdentityPubkey: resp.IdentityPubkey,
Chain: resp.Chains[0].Chain,
Network: resp.Chains[0].Network,
Version: fmt.Sprintf("lnd-%s", resp.Version),
IsSyncedToGraph: resp.SyncedToGraph,
IsSyncedToChain: resp.SyncedToChain,
}
return ret, err
}
// Cleanup - clean up
func (l *LndRestLightningAPI) Cleanup() {
// Nothing to do here
}
func stringToUint64(str string) uint64 {
ret, err := strconv.ParseUint(str, 10, 64)
if err != nil {
return 0
}
return ret
}
// GetChannels - GetChannels API
func (l *LndRestLightningAPI) GetChannels(ctx context.Context) (*ChannelsAPI, error) {
resp, err := l.HTTPAPI.HTTPGetChannels(ctx, l.Request, l.Transport)
if err != nil {
return nil, err
}
chans := make([]ChannelAPI, 0)
for _, channel := range resp.Channels {
htlcs := make([]HtlcAPI, 0)
for _, h := range channel.PendingHtlcs {
htlcs = append(htlcs, HtlcAPI{
Amount: stringToUint64(h.Amount),
Incoming: h.Incoming,
ForwardingChannel: stringToUint64(h.ForwardingChannel),
ForwardingHtlcIndex: stringToUint64(h.ForwardingHtlcIndex),
})
}
chans = append(chans, ChannelAPI{
Private: channel.Private,
Active: channel.Active,
RemotePubkey: channel.RemotePubkey,
ChanID: stringToUint64(channel.ChanID),
RemoteBalance: stringToUint64(channel.RemoteBalance),
LocalBalance: stringToUint64(channel.LocalBalance),
Capacity: stringToUint64(channel.Capacity),
PendingHtlcs: htlcs,
NumUpdates: stringToUint64(channel.NumUpdates),
CommitFee: stringToUint64(channel.CommitFee),
TotalSatoshisSent: stringToUint64(channel.TotalSatoshisSent),
TotalSatoshisReceived: stringToUint64(channel.TotalSatoshisReceived),
Initiator: channel.Initiator,
})
}
ret := &ChannelsAPI{
Channels: chans,
}
return ret, nil
}
func toPolicyWeb(policy *RoutingPolicyOverride) *RoutingPolicyAPI {
if policy == nil {
return nil
}
return &RoutingPolicyAPI{
TimeLockDelta: policy.TimeLockDelta,
MinHtlc: stringToUint64(policy.MinHtlc),
BaseFee: stringToUint64(policy.FeeBaseMsat),
FeeRate: stringToUint64(policy.FeeRateMilliMsat),
Disabled: policy.Disabled,
LastUpdate: entities.JsonTime(time.Unix(int64(policy.LastUpdate), 0)),
MaxHtlc: stringToUint64(policy.MaxHtlcMsat),
}
}
// DescribeGraph - DescribeGraph API
func (l *LndRestLightningAPI) DescribeGraph(ctx context.Context, unannounced bool) (*DescribeGraphAPI, error) {
resp, err := l.HTTPAPI.HTTPGetGraph(ctx, l.Request, l.Transport, unannounced)
if err != nil {
return nil, err
}
nodes := make([]DescribeGraphNodeAPI, 0)
for _, node := range resp.GraphNodeOverride {
nodes = append(nodes, l.convertNode(node))
}
channels := make([]NodeChannelAPI, 0)
for _, edge := range resp.GraphEdgesOverride {
channels = append(channels, l.convertChan(edge))
}
ret := &DescribeGraphAPI{
Nodes: nodes,
Channels: channels,
}
return ret, nil
}
func (l *LndRestLightningAPI) convertNode(node *GraphNodeOverride) DescribeGraphNodeAPI {
addresses := make([]NodeAddressAPI, 0)
for _, addr := range node.Addresses {
addresses = append(addresses, NodeAddressAPI{Addr: addr.Addr, Network: addr.Network})
}
features := make(map[string]NodeFeatureAPI)
for id, feat := range node.Features {
features[fmt.Sprintf("%d", id)] = NodeFeatureAPI{Name: feat.Name, IsRequired: feat.IsRequired, IsKnown: feat.IsKnown}
}
return DescribeGraphNodeAPI{PubKey: node.PubKey, Alias: node.Alias, Color: node.Color, Features: features, Addresses: addresses,
LastUpdate: entities.JsonTime(time.Unix(int64(node.LastUpdate), 0))}
}
func (l *LndRestLightningAPI) convertChan(edge *GraphEdgeOverride) NodeChannelAPI {
return NodeChannelAPI{
ChannelID: stringToUint64(edge.ChannelID),
ChanPoint: edge.ChanPoint,
Node1Pub: edge.Node1Pub,
Node2Pub: edge.Node2Pub,
Capacity: stringToUint64(edge.Capacity),
Node1Policy: toPolicyWeb(edge.Node1Policy),
Node2Policy: toPolicyWeb(edge.Node2Policy),
LastUpdate: entities.JsonTime(time.Unix(int64(edge.LastUpdate), 0)),
}
}
// GetNodeInfo - GetNodeInfo API
func (l *LndRestLightningAPI) GetNodeInfo(ctx context.Context, pubKey string, channels bool) (*NodeInfoAPI, error) {
resp, err := l.HTTPAPI.HTTPGetNodeInfo(ctx, l.Request, l.Transport, pubKey, channels)
if err != nil {
return nil, err
}
ch := make([]NodeChannelAPI, 0)
for _, edge := range resp.Channels {
ch = append(ch, l.convertChan(edge))
}
ret := &NodeInfoAPI{Node: l.convertNode(resp.Node), Channels: ch, NumChannels: uint32(resp.NumChannels), TotalCapacity: stringToUint64(resp.TotalCapacity)}
return ret, nil
}
// GetChanInfo - GetChanInfo API
func (l *LndRestLightningAPI) GetChanInfo(ctx context.Context, chanID uint64) (*NodeChannelAPI, error) {
resp, err := l.HTTPAPI.HTTPGetChanInfo(ctx, l.Request, l.Transport, chanID)
if err != nil {
return nil, err
}
ret := l.convertChan(resp)
return &ret, nil
}