mirror of
https://github.com/lightninglabs/loop.git
synced 2026-08-13 12:33:03 +02:00
multi: consume and log sever state updates
This commit is contained in:
carla
parent
a6539b6adb
commit
cd2b08aec6
8 changed files with 819 additions and 65 deletions
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@ -162,7 +162,7 @@ func NewClient(dbDir string, cfg *ClientConfig) (*Client, func(), error) {
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}
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cleanup := func() {
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swapServerClient.Close()
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swapServerClient.stop()
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}
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return client, cleanup, nil
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19
loopin.go
19
loopin.go
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@ -5,6 +5,7 @@ import (
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"crypto/rand"
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"crypto/sha256"
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"fmt"
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"sync"
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"time"
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"github.com/btcsuite/btcutil"
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@ -61,6 +62,8 @@ type loopInSwap struct {
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htlcTxHash *chainhash.Hash
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timeoutAddr btcutil.Address
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wg sync.WaitGroup
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}
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// loopInInitResult contains information about a just-initiated loop in swap.
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@ -293,9 +296,25 @@ func (s *loopInSwap) sendUpdate(ctx context.Context) error {
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func (s *loopInSwap) execute(mainCtx context.Context,
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cfg *executeConfig, height int32) error {
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defer s.wg.Wait()
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s.executeConfig = *cfg
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s.height = height
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// Create context for our state subscription which we will cancel once
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// swap execution has completed, ensuring that we kill the subscribe
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// goroutine.
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subCtx, cancel := context.WithCancel(mainCtx)
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defer cancel()
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s.wg.Add(1)
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go func() {
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defer s.wg.Done()
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subscribeAndLogUpdates(
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subCtx, s.hash, s.log, s.server.SubscribeLoopInUpdates,
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)
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}()
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// Announce swap by sending out an initial update.
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err := s.sendUpdate(mainCtx)
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if err != nil {
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19
loopout.go
19
loopout.go
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@ -6,6 +6,7 @@ import (
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"crypto/sha256"
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"errors"
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"fmt"
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"sync"
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"time"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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@ -62,6 +63,8 @@ type loopOutSwap struct {
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swapPaymentChan chan lndclient.PaymentResult
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prePaymentChan chan lndclient.PaymentResult
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wg sync.WaitGroup
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}
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// executeConfig contains extra configuration to execute the swap.
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@ -254,9 +257,25 @@ func (s *loopOutSwap) sendUpdate(ctx context.Context) error {
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func (s *loopOutSwap) execute(mainCtx context.Context,
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cfg *executeConfig, height int32) error {
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defer s.wg.Wait()
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s.executeConfig = *cfg
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s.height = height
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// Create context for our state subscription which we will cancel once
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// swap execution has completed, ensuring that we kill the subscribe
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// goroutine.
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subCtx, cancel := context.WithCancel(mainCtx)
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defer cancel()
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s.wg.Add(1)
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go func() {
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defer s.wg.Done()
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subscribeAndLogUpdates(
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subCtx, s.hash, s.log, s.server.SubscribeLoopOutUpdates,
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)
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}()
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// Execute swap.
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err := s.executeAndFinalize(mainCtx)
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@ -71,6 +71,85 @@ func (ProtocolVersion) EnumDescriptor() ([]byte, []int) {
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return fileDescriptor_ad098daeda4239f7, []int{0}
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}
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// ServerSwapState is an enum which represents all the states a swap may have
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// from the server's perspective.
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type ServerSwapState int32
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const (
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// The server has created the swap.
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ServerSwapState_INITIATED ServerSwapState = 0
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// The server has published the loop out on chain htlc.
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ServerSwapState_HTLC_PUBLISHED ServerSwapState = 1
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// The swap completed successfully.
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ServerSwapState_SUCCESS ServerSwapState = 2
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//
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//The swap failed for a reason that is unknown to the server, this is only
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//set for older swaps.
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ServerSwapState_FAILED_UNKNOWN ServerSwapState = 3
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// No htlc was confirmed in time for the loop in swap to complete.
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ServerSwapState_FAILED_NO_HTLC ServerSwapState = 4
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// A loop in htlc confirmed on chain, but it did not have the correct value.
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ServerSwapState_FAILED_INVALID_HTLC_AMOUNT ServerSwapState = 5
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//
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//We did not succeed in completing the loop in off chain payment before the
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//timeout.
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ServerSwapState_FAILED_OFF_CHAIN_TIMEOUT ServerSwapState = 6
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// The on chain timeout was claimed.
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ServerSwapState_FAILED_TIMEOUT ServerSwapState = 7
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//
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//The server could not publish the loop out on chain htlc before the deadline
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//provided.
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ServerSwapState_FAILED_SWAP_DEADLINE ServerSwapState = 8
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// The server could not publish the loop out on chain htlc.
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ServerSwapState_FAILED_HTLC_PUBLICATION ServerSwapState = 9
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// The server has published the loop out on chain timeout tx.
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ServerSwapState_TIMEOUT_PUBLISHED ServerSwapState = 10
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// The swap has failed for unknown reasons, it will not be completed.
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ServerSwapState_UNEXPECTED_FAILURE ServerSwapState = 11
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// The swap htlc has confirmed on chain.
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ServerSwapState_HTLC_CONFIRMED ServerSwapState = 12
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)
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var ServerSwapState_name = map[int32]string{
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0: "INITIATED",
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1: "HTLC_PUBLISHED",
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2: "SUCCESS",
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3: "FAILED_UNKNOWN",
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4: "FAILED_NO_HTLC",
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5: "FAILED_INVALID_HTLC_AMOUNT",
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6: "FAILED_OFF_CHAIN_TIMEOUT",
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7: "FAILED_TIMEOUT",
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8: "FAILED_SWAP_DEADLINE",
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9: "FAILED_HTLC_PUBLICATION",
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10: "TIMEOUT_PUBLISHED",
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11: "UNEXPECTED_FAILURE",
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12: "HTLC_CONFIRMED",
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}
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var ServerSwapState_value = map[string]int32{
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"INITIATED": 0,
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"HTLC_PUBLISHED": 1,
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"SUCCESS": 2,
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"FAILED_UNKNOWN": 3,
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"FAILED_NO_HTLC": 4,
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"FAILED_INVALID_HTLC_AMOUNT": 5,
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"FAILED_OFF_CHAIN_TIMEOUT": 6,
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"FAILED_TIMEOUT": 7,
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"FAILED_SWAP_DEADLINE": 8,
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"FAILED_HTLC_PUBLICATION": 9,
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"TIMEOUT_PUBLISHED": 10,
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"UNEXPECTED_FAILURE": 11,
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"HTLC_CONFIRMED": 12,
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}
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func (x ServerSwapState) String() string {
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return proto.EnumName(ServerSwapState_name, int32(x))
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}
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func (ServerSwapState) EnumDescriptor() ([]byte, []int) {
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return fileDescriptor_ad098daeda4239f7, []int{1}
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}
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type ServerLoopOutRequest struct {
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ReceiverKey []byte `protobuf:"bytes,1,opt,name=receiver_key,json=receiverKey,proto3" json:"receiver_key,omitempty"`
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SwapHash []byte `protobuf:"bytes,2,opt,name=swap_hash,json=swapHash,proto3" json:"swap_hash,omitempty"`
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@ -884,8 +963,156 @@ func (m *ServerLoopOutPushPreimageResponse) XXX_DiscardUnknown() {
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var xxx_messageInfo_ServerLoopOutPushPreimageResponse proto.InternalMessageInfo
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type SubscribeUpdatesRequest struct {
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// The protocol version that the client adheres to.
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ProtocolVersion ProtocolVersion `protobuf:"varint,1,opt,name=protocol_version,json=protocolVersion,proto3,enum=looprpc.ProtocolVersion" json:"protocol_version,omitempty"`
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// Swap hash is the hash of the swap to subscribe to updates for.
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SwapHash []byte `protobuf:"bytes,2,opt,name=swap_hash,json=swapHash,proto3" json:"swap_hash,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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}
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func (m *SubscribeUpdatesRequest) Reset() { *m = SubscribeUpdatesRequest{} }
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func (m *SubscribeUpdatesRequest) String() string { return proto.CompactTextString(m) }
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func (*SubscribeUpdatesRequest) ProtoMessage() {}
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func (*SubscribeUpdatesRequest) Descriptor() ([]byte, []int) {
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return fileDescriptor_ad098daeda4239f7, []int{14}
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}
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func (m *SubscribeUpdatesRequest) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_SubscribeUpdatesRequest.Unmarshal(m, b)
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}
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func (m *SubscribeUpdatesRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
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return xxx_messageInfo_SubscribeUpdatesRequest.Marshal(b, m, deterministic)
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}
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func (m *SubscribeUpdatesRequest) XXX_Merge(src proto.Message) {
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xxx_messageInfo_SubscribeUpdatesRequest.Merge(m, src)
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}
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func (m *SubscribeUpdatesRequest) XXX_Size() int {
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return xxx_messageInfo_SubscribeUpdatesRequest.Size(m)
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}
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func (m *SubscribeUpdatesRequest) XXX_DiscardUnknown() {
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xxx_messageInfo_SubscribeUpdatesRequest.DiscardUnknown(m)
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}
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var xxx_messageInfo_SubscribeUpdatesRequest proto.InternalMessageInfo
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func (m *SubscribeUpdatesRequest) GetProtocolVersion() ProtocolVersion {
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if m != nil {
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return m.ProtocolVersion
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}
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return ProtocolVersion_LEGACY
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}
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func (m *SubscribeUpdatesRequest) GetSwapHash() []byte {
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if m != nil {
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return m.SwapHash
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}
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return nil
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}
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type SubscribeLoopOutUpdatesResponse struct {
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// The unix timestamp in nanoseconds when the swap was updated.
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TimestampNs int64 `protobuf:"varint,1,opt,name=timestamp_ns,json=timestampNs,proto3" json:"timestamp_ns,omitempty"`
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// The swap's current state.
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State ServerSwapState `protobuf:"varint,2,opt,name=state,proto3,enum=looprpc.ServerSwapState" json:"state,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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}
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func (m *SubscribeLoopOutUpdatesResponse) Reset() { *m = SubscribeLoopOutUpdatesResponse{} }
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func (m *SubscribeLoopOutUpdatesResponse) String() string { return proto.CompactTextString(m) }
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func (*SubscribeLoopOutUpdatesResponse) ProtoMessage() {}
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func (*SubscribeLoopOutUpdatesResponse) Descriptor() ([]byte, []int) {
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return fileDescriptor_ad098daeda4239f7, []int{15}
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}
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func (m *SubscribeLoopOutUpdatesResponse) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_SubscribeLoopOutUpdatesResponse.Unmarshal(m, b)
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}
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func (m *SubscribeLoopOutUpdatesResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
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return xxx_messageInfo_SubscribeLoopOutUpdatesResponse.Marshal(b, m, deterministic)
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}
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func (m *SubscribeLoopOutUpdatesResponse) XXX_Merge(src proto.Message) {
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xxx_messageInfo_SubscribeLoopOutUpdatesResponse.Merge(m, src)
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}
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func (m *SubscribeLoopOutUpdatesResponse) XXX_Size() int {
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return xxx_messageInfo_SubscribeLoopOutUpdatesResponse.Size(m)
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}
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func (m *SubscribeLoopOutUpdatesResponse) XXX_DiscardUnknown() {
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xxx_messageInfo_SubscribeLoopOutUpdatesResponse.DiscardUnknown(m)
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}
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var xxx_messageInfo_SubscribeLoopOutUpdatesResponse proto.InternalMessageInfo
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func (m *SubscribeLoopOutUpdatesResponse) GetTimestampNs() int64 {
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if m != nil {
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return m.TimestampNs
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}
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return 0
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}
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func (m *SubscribeLoopOutUpdatesResponse) GetState() ServerSwapState {
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if m != nil {
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return m.State
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}
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return ServerSwapState_INITIATED
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}
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type SubscribeLoopInUpdatesResponse struct {
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// The unix timestamp in nanoseconds when the swap was updated.
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TimestampNs int64 `protobuf:"varint,1,opt,name=timestamp_ns,json=timestampNs,proto3" json:"timestamp_ns,omitempty"`
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// The swap's current state.
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State ServerSwapState `protobuf:"varint,2,opt,name=state,proto3,enum=looprpc.ServerSwapState" json:"state,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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}
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func (m *SubscribeLoopInUpdatesResponse) Reset() { *m = SubscribeLoopInUpdatesResponse{} }
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func (m *SubscribeLoopInUpdatesResponse) String() string { return proto.CompactTextString(m) }
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func (*SubscribeLoopInUpdatesResponse) ProtoMessage() {}
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func (*SubscribeLoopInUpdatesResponse) Descriptor() ([]byte, []int) {
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return fileDescriptor_ad098daeda4239f7, []int{16}
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}
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func (m *SubscribeLoopInUpdatesResponse) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_SubscribeLoopInUpdatesResponse.Unmarshal(m, b)
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}
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func (m *SubscribeLoopInUpdatesResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
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return xxx_messageInfo_SubscribeLoopInUpdatesResponse.Marshal(b, m, deterministic)
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}
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func (m *SubscribeLoopInUpdatesResponse) XXX_Merge(src proto.Message) {
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xxx_messageInfo_SubscribeLoopInUpdatesResponse.Merge(m, src)
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}
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func (m *SubscribeLoopInUpdatesResponse) XXX_Size() int {
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return xxx_messageInfo_SubscribeLoopInUpdatesResponse.Size(m)
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}
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func (m *SubscribeLoopInUpdatesResponse) XXX_DiscardUnknown() {
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xxx_messageInfo_SubscribeLoopInUpdatesResponse.DiscardUnknown(m)
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}
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var xxx_messageInfo_SubscribeLoopInUpdatesResponse proto.InternalMessageInfo
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func (m *SubscribeLoopInUpdatesResponse) GetTimestampNs() int64 {
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if m != nil {
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return m.TimestampNs
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}
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return 0
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}
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func (m *SubscribeLoopInUpdatesResponse) GetState() ServerSwapState {
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if m != nil {
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return m.State
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}
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return ServerSwapState_INITIATED
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}
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func init() {
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proto.RegisterEnum("looprpc.ProtocolVersion", ProtocolVersion_name, ProtocolVersion_value)
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proto.RegisterEnum("looprpc.ServerSwapState", ServerSwapState_name, ServerSwapState_value)
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proto.RegisterType((*ServerLoopOutRequest)(nil), "looprpc.ServerLoopOutRequest")
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proto.RegisterType((*ServerLoopOutResponse)(nil), "looprpc.ServerLoopOutResponse")
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proto.RegisterType((*ServerLoopOutQuoteRequest)(nil), "looprpc.ServerLoopOutQuoteRequest")
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@ -900,69 +1127,91 @@ func init() {
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proto.RegisterType((*ServerLoopInTerms)(nil), "looprpc.ServerLoopInTerms")
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proto.RegisterType((*ServerLoopOutPushPreimageRequest)(nil), "looprpc.ServerLoopOutPushPreimageRequest")
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proto.RegisterType((*ServerLoopOutPushPreimageResponse)(nil), "looprpc.ServerLoopOutPushPreimageResponse")
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proto.RegisterType((*SubscribeUpdatesRequest)(nil), "looprpc.SubscribeUpdatesRequest")
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proto.RegisterType((*SubscribeLoopOutUpdatesResponse)(nil), "looprpc.SubscribeLoopOutUpdatesResponse")
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proto.RegisterType((*SubscribeLoopInUpdatesResponse)(nil), "looprpc.SubscribeLoopInUpdatesResponse")
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}
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func init() { proto.RegisterFile("server.proto", fileDescriptor_ad098daeda4239f7) }
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var fileDescriptor_ad098daeda4239f7 = []byte{
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// 906 bytes of a gzipped FileDescriptorProto
|
||||
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|
||||
0x28, 0x84, 0xf6, 0xd2, 0xe1, 0xd1, 0x6d, 0xfb, 0x77, 0xa5, 0xd9, 0x2b, 0x9d, 0xc0, 0xf3, 0x14,
|
||||
0x67, 0xa3, 0xaf, 0xd3, 0x8f, 0xa5, 0xac, 0xa0, 0xea, 0xf1, 0x63, 0xa0, 0xac, 0xda, 0x42, 0x8f,
|
||||
0xf0, 0x9f, 0xc4, 0x3b, 0xf4, 0x88, 0xff, 0xf8, 0xdd, 0xa5, 0x47, 0x78, 0x41, 0x07, 0x8a, 0xf1,
|
||||
0x1d, 0x7c, 0x90, 0x82, 0x4d, 0xfe, 0x00, 0x54, 0xab, 0x77, 0x43, 0x50, 0x07, 0xca, 0x4c, 0x5d,
|
||||
0x99, 0x6e, 0x6c, 0xf4, 0x26, 0x15, 0x1c, 0x5d, 0xb5, 0x77, 0x47, 0x96, 0x91, 0xd5, 0xa3, 0xde,
|
||||
0xc2, 0x56, 0xd3, 0x7b, 0x4b, 0x50, 0xad, 0xdf, 0x07, 0x61, 0xb7, 0x5e, 0xc6, 0x76, 0x6d, 0x72,
|
||||
0xdd, 0xa1, 0xda, 0xe2, 0x78, 0xfa, 0x36, 0xae, 0x1e, 0xad, 0x22, 0xd2, 0x57, 0xe6, 0x3b, 0x0e,
|
||||
0x11, 0xd8, 0x49, 0xdf, 0x70, 0x8f, 0xa8, 0xf3, 0x55, 0x7a, 0x9d, 0x95, 0x25, 0xf9, 0x8e, 0xbb,
|
||||
0xc8, 0xd1, 0x65, 0xff, 0xcd, 0x7f, 0x01, 0x00, 0x00, 0xff, 0xff, 0x2c, 0xcd, 0x43, 0xb7, 0xdb,
|
||||
0x0e, 0x00, 0x00,
|
||||
}
|
||||
|
||||
// Reference imports to suppress errors if they are not otherwise used.
|
||||
|
|
@ -984,6 +1233,8 @@ type SwapServerClient interface {
|
|||
LoopInTerms(ctx context.Context, in *ServerLoopInTermsRequest, opts ...grpc.CallOption) (*ServerLoopInTerms, error)
|
||||
NewLoopInSwap(ctx context.Context, in *ServerLoopInRequest, opts ...grpc.CallOption) (*ServerLoopInResponse, error)
|
||||
LoopInQuote(ctx context.Context, in *ServerLoopInQuoteRequest, opts ...grpc.CallOption) (*ServerLoopInQuoteResponse, error)
|
||||
SubscribeLoopOutUpdates(ctx context.Context, in *SubscribeUpdatesRequest, opts ...grpc.CallOption) (SwapServer_SubscribeLoopOutUpdatesClient, error)
|
||||
SubscribeLoopInUpdates(ctx context.Context, in *SubscribeUpdatesRequest, opts ...grpc.CallOption) (SwapServer_SubscribeLoopInUpdatesClient, error)
|
||||
}
|
||||
|
||||
type swapServerClient struct {
|
||||
|
|
@ -1057,6 +1308,70 @@ func (c *swapServerClient) LoopInQuote(ctx context.Context, in *ServerLoopInQuot
|
|||
return out, nil
|
||||
}
|
||||
|
||||
func (c *swapServerClient) SubscribeLoopOutUpdates(ctx context.Context, in *SubscribeUpdatesRequest, opts ...grpc.CallOption) (SwapServer_SubscribeLoopOutUpdatesClient, error) {
|
||||
stream, err := c.cc.NewStream(ctx, &_SwapServer_serviceDesc.Streams[0], "/looprpc.SwapServer/SubscribeLoopOutUpdates", opts...)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
x := &swapServerSubscribeLoopOutUpdatesClient{stream}
|
||||
if err := x.ClientStream.SendMsg(in); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if err := x.ClientStream.CloseSend(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return x, nil
|
||||
}
|
||||
|
||||
type SwapServer_SubscribeLoopOutUpdatesClient interface {
|
||||
Recv() (*SubscribeLoopOutUpdatesResponse, error)
|
||||
grpc.ClientStream
|
||||
}
|
||||
|
||||
type swapServerSubscribeLoopOutUpdatesClient struct {
|
||||
grpc.ClientStream
|
||||
}
|
||||
|
||||
func (x *swapServerSubscribeLoopOutUpdatesClient) Recv() (*SubscribeLoopOutUpdatesResponse, error) {
|
||||
m := new(SubscribeLoopOutUpdatesResponse)
|
||||
if err := x.ClientStream.RecvMsg(m); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
func (c *swapServerClient) SubscribeLoopInUpdates(ctx context.Context, in *SubscribeUpdatesRequest, opts ...grpc.CallOption) (SwapServer_SubscribeLoopInUpdatesClient, error) {
|
||||
stream, err := c.cc.NewStream(ctx, &_SwapServer_serviceDesc.Streams[1], "/looprpc.SwapServer/SubscribeLoopInUpdates", opts...)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
x := &swapServerSubscribeLoopInUpdatesClient{stream}
|
||||
if err := x.ClientStream.SendMsg(in); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if err := x.ClientStream.CloseSend(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return x, nil
|
||||
}
|
||||
|
||||
type SwapServer_SubscribeLoopInUpdatesClient interface {
|
||||
Recv() (*SubscribeLoopInUpdatesResponse, error)
|
||||
grpc.ClientStream
|
||||
}
|
||||
|
||||
type swapServerSubscribeLoopInUpdatesClient struct {
|
||||
grpc.ClientStream
|
||||
}
|
||||
|
||||
func (x *swapServerSubscribeLoopInUpdatesClient) Recv() (*SubscribeLoopInUpdatesResponse, error) {
|
||||
m := new(SubscribeLoopInUpdatesResponse)
|
||||
if err := x.ClientStream.RecvMsg(m); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
// SwapServerServer is the server API for SwapServer service.
|
||||
type SwapServerServer interface {
|
||||
LoopOutTerms(context.Context, *ServerLoopOutTermsRequest) (*ServerLoopOutTerms, error)
|
||||
|
|
@ -1066,6 +1381,8 @@ type SwapServerServer interface {
|
|||
LoopInTerms(context.Context, *ServerLoopInTermsRequest) (*ServerLoopInTerms, error)
|
||||
NewLoopInSwap(context.Context, *ServerLoopInRequest) (*ServerLoopInResponse, error)
|
||||
LoopInQuote(context.Context, *ServerLoopInQuoteRequest) (*ServerLoopInQuoteResponse, error)
|
||||
SubscribeLoopOutUpdates(*SubscribeUpdatesRequest, SwapServer_SubscribeLoopOutUpdatesServer) error
|
||||
SubscribeLoopInUpdates(*SubscribeUpdatesRequest, SwapServer_SubscribeLoopInUpdatesServer) error
|
||||
}
|
||||
|
||||
// UnimplementedSwapServerServer can be embedded to have forward compatible implementations.
|
||||
|
|
@ -1093,6 +1410,12 @@ func (*UnimplementedSwapServerServer) NewLoopInSwap(ctx context.Context, req *Se
|
|||
func (*UnimplementedSwapServerServer) LoopInQuote(ctx context.Context, req *ServerLoopInQuoteRequest) (*ServerLoopInQuoteResponse, error) {
|
||||
return nil, status.Errorf(codes.Unimplemented, "method LoopInQuote not implemented")
|
||||
}
|
||||
func (*UnimplementedSwapServerServer) SubscribeLoopOutUpdates(req *SubscribeUpdatesRequest, srv SwapServer_SubscribeLoopOutUpdatesServer) error {
|
||||
return status.Errorf(codes.Unimplemented, "method SubscribeLoopOutUpdates not implemented")
|
||||
}
|
||||
func (*UnimplementedSwapServerServer) SubscribeLoopInUpdates(req *SubscribeUpdatesRequest, srv SwapServer_SubscribeLoopInUpdatesServer) error {
|
||||
return status.Errorf(codes.Unimplemented, "method SubscribeLoopInUpdates not implemented")
|
||||
}
|
||||
|
||||
func RegisterSwapServerServer(s *grpc.Server, srv SwapServerServer) {
|
||||
s.RegisterService(&_SwapServer_serviceDesc, srv)
|
||||
|
|
@ -1224,6 +1547,48 @@ func _SwapServer_LoopInQuote_Handler(srv interface{}, ctx context.Context, dec f
|
|||
return interceptor(ctx, in, info, handler)
|
||||
}
|
||||
|
||||
func _SwapServer_SubscribeLoopOutUpdates_Handler(srv interface{}, stream grpc.ServerStream) error {
|
||||
m := new(SubscribeUpdatesRequest)
|
||||
if err := stream.RecvMsg(m); err != nil {
|
||||
return err
|
||||
}
|
||||
return srv.(SwapServerServer).SubscribeLoopOutUpdates(m, &swapServerSubscribeLoopOutUpdatesServer{stream})
|
||||
}
|
||||
|
||||
type SwapServer_SubscribeLoopOutUpdatesServer interface {
|
||||
Send(*SubscribeLoopOutUpdatesResponse) error
|
||||
grpc.ServerStream
|
||||
}
|
||||
|
||||
type swapServerSubscribeLoopOutUpdatesServer struct {
|
||||
grpc.ServerStream
|
||||
}
|
||||
|
||||
func (x *swapServerSubscribeLoopOutUpdatesServer) Send(m *SubscribeLoopOutUpdatesResponse) error {
|
||||
return x.ServerStream.SendMsg(m)
|
||||
}
|
||||
|
||||
func _SwapServer_SubscribeLoopInUpdates_Handler(srv interface{}, stream grpc.ServerStream) error {
|
||||
m := new(SubscribeUpdatesRequest)
|
||||
if err := stream.RecvMsg(m); err != nil {
|
||||
return err
|
||||
}
|
||||
return srv.(SwapServerServer).SubscribeLoopInUpdates(m, &swapServerSubscribeLoopInUpdatesServer{stream})
|
||||
}
|
||||
|
||||
type SwapServer_SubscribeLoopInUpdatesServer interface {
|
||||
Send(*SubscribeLoopInUpdatesResponse) error
|
||||
grpc.ServerStream
|
||||
}
|
||||
|
||||
type swapServerSubscribeLoopInUpdatesServer struct {
|
||||
grpc.ServerStream
|
||||
}
|
||||
|
||||
func (x *swapServerSubscribeLoopInUpdatesServer) Send(m *SubscribeLoopInUpdatesResponse) error {
|
||||
return x.ServerStream.SendMsg(m)
|
||||
}
|
||||
|
||||
var _SwapServer_serviceDesc = grpc.ServiceDesc{
|
||||
ServiceName: "looprpc.SwapServer",
|
||||
HandlerType: (*SwapServerServer)(nil),
|
||||
|
|
@ -1257,6 +1622,17 @@ var _SwapServer_serviceDesc = grpc.ServiceDesc{
|
|||
Handler: _SwapServer_LoopInQuote_Handler,
|
||||
},
|
||||
},
|
||||
Streams: []grpc.StreamDesc{},
|
||||
Streams: []grpc.StreamDesc{
|
||||
{
|
||||
StreamName: "SubscribeLoopOutUpdates",
|
||||
Handler: _SwapServer_SubscribeLoopOutUpdates_Handler,
|
||||
ServerStreams: true,
|
||||
},
|
||||
{
|
||||
StreamName: "SubscribeLoopInUpdates",
|
||||
Handler: _SwapServer_SubscribeLoopInUpdates_Handler,
|
||||
ServerStreams: true,
|
||||
},
|
||||
},
|
||||
Metadata: "server.proto",
|
||||
}
|
||||
|
|
|
|||
|
|
@ -20,6 +20,12 @@ service SwapServer {
|
|||
|
||||
rpc LoopInQuote (ServerLoopInQuoteRequest)
|
||||
returns (ServerLoopInQuoteResponse);
|
||||
|
||||
rpc SubscribeLoopOutUpdates(SubscribeUpdatesRequest)
|
||||
returns (stream SubscribeLoopOutUpdatesResponse);
|
||||
|
||||
rpc SubscribeLoopInUpdates(SubscribeUpdatesRequest)
|
||||
returns (stream SubscribeLoopInUpdatesResponse);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -177,3 +183,79 @@ message ServerLoopOutPushPreimageRequest {
|
|||
|
||||
message ServerLoopOutPushPreimageResponse {
|
||||
}
|
||||
|
||||
message SubscribeUpdatesRequest {
|
||||
// The protocol version that the client adheres to.
|
||||
ProtocolVersion protocol_version = 1;
|
||||
|
||||
// Swap hash is the hash of the swap to subscribe to updates for.
|
||||
bytes swap_hash = 2;
|
||||
}
|
||||
|
||||
// ServerSwapState is an enum which represents all the states a swap may have
|
||||
// from the server's perspective.
|
||||
enum ServerSwapState {
|
||||
// The server has created the swap.
|
||||
INITIATED = 0;
|
||||
|
||||
// The server has published the loop out on chain htlc.
|
||||
HTLC_PUBLISHED = 1;
|
||||
|
||||
// The swap completed successfully.
|
||||
SUCCESS = 2;
|
||||
|
||||
/*
|
||||
The swap failed for a reason that is unknown to the server, this is only
|
||||
set for older swaps.
|
||||
*/
|
||||
FAILED_UNKNOWN = 3;
|
||||
|
||||
// No htlc was confirmed in time for the loop in swap to complete.
|
||||
FAILED_NO_HTLC = 4;
|
||||
|
||||
// A loop in htlc confirmed on chain, but it did not have the correct value.
|
||||
FAILED_INVALID_HTLC_AMOUNT = 5;
|
||||
|
||||
/*
|
||||
We did not succeed in completing the loop in off chain payment before the
|
||||
timeout.
|
||||
*/
|
||||
FAILED_OFF_CHAIN_TIMEOUT = 6;
|
||||
|
||||
// The on chain timeout was claimed.
|
||||
FAILED_TIMEOUT = 7;
|
||||
|
||||
/*
|
||||
The server could not publish the loop out on chain htlc before the deadline
|
||||
provided.
|
||||
*/
|
||||
FAILED_SWAP_DEADLINE = 8;
|
||||
|
||||
// The server could not publish the loop out on chain htlc.
|
||||
FAILED_HTLC_PUBLICATION = 9;
|
||||
|
||||
// The server has published the loop out on chain timeout tx.
|
||||
TIMEOUT_PUBLISHED = 10;
|
||||
|
||||
// The swap has failed for unknown reasons, it will not be completed.
|
||||
UNEXPECTED_FAILURE = 11;
|
||||
|
||||
// The swap htlc has confirmed on chain.
|
||||
HTLC_CONFIRMED = 12;
|
||||
}
|
||||
|
||||
message SubscribeLoopOutUpdatesResponse {
|
||||
// The unix timestamp in nanoseconds when the swap was updated.
|
||||
int64 timestamp_ns = 1;
|
||||
|
||||
// The swap's current state.
|
||||
ServerSwapState state = 2;
|
||||
}
|
||||
|
||||
message SubscribeLoopInUpdatesResponse {
|
||||
// The unix timestamp in nanoseconds when the swap was updated.
|
||||
int64 timestamp_ns = 1;
|
||||
|
||||
// The swap's current state.
|
||||
ServerSwapState state = 2;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -182,3 +182,18 @@ func (s *serverMock) GetLoopInQuote(ctx context.Context, amt btcutil.Amount) (
|
|||
CltvDelta: testChargeOnChainCltvDelta,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// SubscribeLoopOutUpdates provides a mocked implementation of state
|
||||
// subscriptions.
|
||||
func (s *serverMock) SubscribeLoopOutUpdates(_ context.Context,
|
||||
_ lntypes.Hash) (<-chan *ServerUpdate, <-chan error, error) {
|
||||
|
||||
return nil, nil, nil
|
||||
}
|
||||
|
||||
// SubscribeLoopInUpdates provides a mocked implementation of state subscriptions.
|
||||
func (s *serverMock) SubscribeLoopInUpdates(_ context.Context,
|
||||
_ lntypes.Hash) (<-chan *ServerUpdate, <-chan error, error) {
|
||||
|
||||
return nil, nil, nil
|
||||
}
|
||||
|
|
|
|||
|
|
@ -6,7 +6,10 @@ import (
|
|||
"encoding/hex"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"net"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/btcsuite/btcd/btcec"
|
||||
|
|
@ -24,6 +27,21 @@ import (
|
|||
// supported by the loop client.
|
||||
const protocolVersion = looprpc.ProtocolVersion_PREIMAGE_PUSH_LOOP_OUT
|
||||
|
||||
var (
|
||||
// errServerSubscriptionComplete is returned when our subscription to
|
||||
// server updates exits because the server has no more updates to
|
||||
// provide us, because its part in the swap is complete.
|
||||
errServerSubscriptionComplete = errors.New("server finished serving " +
|
||||
"updates")
|
||||
|
||||
// errSubscriptionFailed is returned when our subscription returns with
|
||||
// and EOF, indicating that the server restarted, we had an unexpected
|
||||
// network failure. Since we do not have restart-recovery, we note that
|
||||
// we will not resume our subscription once this error occurs.
|
||||
errSubscriptionFailed = errors.New("failed, no further updates will " +
|
||||
"be provided")
|
||||
)
|
||||
|
||||
type swapServerClient interface {
|
||||
GetLoopOutTerms(ctx context.Context) (
|
||||
*LoopOutTerms, error)
|
||||
|
|
@ -51,11 +69,31 @@ type swapServerClient interface {
|
|||
swapHash lntypes.Hash, amount btcutil.Amount,
|
||||
senderKey [33]byte, swapInvoice string, lastHop *route.Vertex) (
|
||||
*newLoopInResponse, error)
|
||||
|
||||
// SubscribeLoopOutUpdates subscribes to loop out server state.
|
||||
SubscribeLoopOutUpdates(ctx context.Context,
|
||||
hash lntypes.Hash) (<-chan *ServerUpdate, <-chan error, error)
|
||||
|
||||
// SubscribeLoopInUpdates subscribes to loop in server state.
|
||||
SubscribeLoopInUpdates(ctx context.Context,
|
||||
hash lntypes.Hash) (<-chan *ServerUpdate, <-chan error, error)
|
||||
}
|
||||
|
||||
type grpcSwapServerClient struct {
|
||||
server looprpc.SwapServerClient
|
||||
conn *grpc.ClientConn
|
||||
|
||||
wg sync.WaitGroup
|
||||
}
|
||||
|
||||
// stop sends the signal for the server's goroutines to shutdown and waits for
|
||||
// them to complete.
|
||||
func (s *grpcSwapServerClient) stop() {
|
||||
if err := s.conn.Close(); err != nil {
|
||||
log.Warnf("could not close connection: %v", err)
|
||||
}
|
||||
|
||||
s.wg.Wait()
|
||||
}
|
||||
|
||||
var _ swapServerClient = (*grpcSwapServerClient)(nil)
|
||||
|
|
@ -275,8 +313,144 @@ func (s *grpcSwapServerClient) NewLoopInSwap(ctx context.Context,
|
|||
}, nil
|
||||
}
|
||||
|
||||
func (s *grpcSwapServerClient) Close() {
|
||||
s.conn.Close()
|
||||
// ServerUpdate summarizes an update from the swap server.
|
||||
type ServerUpdate struct {
|
||||
// State is the state that the server has sent us.
|
||||
State looprpc.ServerSwapState
|
||||
|
||||
// Timestamp is the time of the server state update.
|
||||
Timestamp time.Time
|
||||
}
|
||||
|
||||
// SubscribeLoopInUpdates subscribes to loop in server state and pipes updates
|
||||
// into the channel provided.
|
||||
func (s *grpcSwapServerClient) SubscribeLoopInUpdates(ctx context.Context,
|
||||
hash lntypes.Hash) (<-chan *ServerUpdate, <-chan error, error) {
|
||||
|
||||
resp, err := s.server.SubscribeLoopInUpdates(
|
||||
ctx, &looprpc.SubscribeUpdatesRequest{
|
||||
ProtocolVersion: protocolVersion,
|
||||
SwapHash: hash[:],
|
||||
},
|
||||
)
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
|
||||
receive := func() (*ServerUpdate, error) {
|
||||
response, err := resp.Recv()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &ServerUpdate{
|
||||
State: response.State,
|
||||
Timestamp: time.Unix(0, response.TimestampNs),
|
||||
}, nil
|
||||
}
|
||||
|
||||
updateChan, errChan := s.makeServerUpdate(ctx, receive)
|
||||
return updateChan, errChan, nil
|
||||
}
|
||||
|
||||
// SubscribeLoopOutUpdates subscribes to loop out server state and pipes updates
|
||||
// into the channel provided.
|
||||
func (s *grpcSwapServerClient) SubscribeLoopOutUpdates(ctx context.Context,
|
||||
hash lntypes.Hash) (<-chan *ServerUpdate, <-chan error, error) {
|
||||
|
||||
resp, err := s.server.SubscribeLoopOutUpdates(
|
||||
ctx, &looprpc.SubscribeUpdatesRequest{
|
||||
ProtocolVersion: protocolVersion,
|
||||
SwapHash: hash[:],
|
||||
},
|
||||
)
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
|
||||
receive := func() (*ServerUpdate, error) {
|
||||
response, err := resp.Recv()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &ServerUpdate{
|
||||
State: response.State,
|
||||
Timestamp: time.Unix(0, response.TimestampNs),
|
||||
}, nil
|
||||
}
|
||||
|
||||
updateChan, errChan := s.makeServerUpdate(ctx, receive)
|
||||
return updateChan, errChan, nil
|
||||
}
|
||||
|
||||
// makeServerUpdate takes a stream receive function and a channel that it
|
||||
// should pipe updates into. It sends events into the updates channel until
|
||||
// the client cancels, server client shuts down or the subscription is cancelled
|
||||
// server side.
|
||||
func (s *grpcSwapServerClient) makeServerUpdate(ctx context.Context,
|
||||
receive func() (*ServerUpdate, error)) (<-chan *ServerUpdate,
|
||||
<-chan error) {
|
||||
|
||||
// We will return exactly one error from this function so we buffer
|
||||
// our error channel so that the function exit is not dependent on
|
||||
// the error being read.
|
||||
errChan := make(chan error, 1)
|
||||
updateChan := make(chan *ServerUpdate)
|
||||
|
||||
// Create a goroutine that will pipe updates in to our updates channel.
|
||||
s.wg.Add(1)
|
||||
go func() {
|
||||
defer s.wg.Done()
|
||||
|
||||
for {
|
||||
// Try to receive from our stream. If there are no items
|
||||
// to consume, this call will block. If our stream is
|
||||
// cancelled by the server we will receive an error.
|
||||
response, err := receive()
|
||||
switch err {
|
||||
// If we get a nil error, we proceed with to delivering
|
||||
// the update we have just received.
|
||||
case nil:
|
||||
|
||||
// If we get an EOF error, the server is finished
|
||||
// sending us updates, so we return with a non-nil
|
||||
// a subscription complete error to inform the caller
|
||||
// that they will no longer receive updates.
|
||||
case io.EOF:
|
||||
errChan <- errServerSubscriptionComplete
|
||||
return
|
||||
|
||||
// If we receive a non-nil error, we exit.
|
||||
default:
|
||||
// If we get a transport is closing error, we
|
||||
// send a server restarting error so that the
|
||||
// caller is informed that we will not get
|
||||
// any more updates from the server (since we
|
||||
// don't have retry logic yet).
|
||||
if isErrConClosing(err) {
|
||||
errChan <- errSubscriptionFailed
|
||||
} else {
|
||||
errChan <- err
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
select {
|
||||
// Try to send our update to the update channel.
|
||||
case updateChan <- response:
|
||||
|
||||
// If the client cancels their context, we exit with
|
||||
// no error.
|
||||
case <-ctx.Done():
|
||||
errChan <- nil
|
||||
return
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
return updateChan, errChan
|
||||
}
|
||||
|
||||
// getSwapServerConn returns a connection to the swap server. A non-empty
|
||||
|
|
@ -286,9 +460,14 @@ func getSwapServerConn(address, proxyAddress string, insecure bool,
|
|||
tlsPath string, interceptor *lsat.Interceptor) (*grpc.ClientConn, error) {
|
||||
|
||||
// Create a dial options array.
|
||||
opts := []grpc.DialOption{grpc.WithUnaryInterceptor(
|
||||
interceptor.UnaryInterceptor,
|
||||
)}
|
||||
opts := []grpc.DialOption{
|
||||
grpc.WithUnaryInterceptor(
|
||||
interceptor.UnaryInterceptor,
|
||||
),
|
||||
grpc.WithStreamInterceptor(
|
||||
interceptor.StreamInterceptor,
|
||||
),
|
||||
}
|
||||
|
||||
// There are three options to connect to a swap server, either insecure,
|
||||
// using a self-signed certificate or with a certificate signed by a
|
||||
|
|
@ -331,6 +510,18 @@ func getSwapServerConn(address, proxyAddress string, insecure bool,
|
|||
return conn, nil
|
||||
}
|
||||
|
||||
// isErrConClosing identifies whether we have received a "transport is closing"
|
||||
// error from a grpc stream, indicating that the server has shutdown. We need
|
||||
// to string match this error because ErrConnClosing is part of an internal
|
||||
// grpc package, so cannot be used directly.
|
||||
func isErrConClosing(err error) bool {
|
||||
if err == nil {
|
||||
return false
|
||||
}
|
||||
|
||||
return strings.Contains(err.Error(), "transport is closing")
|
||||
}
|
||||
|
||||
type newLoopOutResponse struct {
|
||||
swapInvoice string
|
||||
prepayInvoice string
|
||||
|
|
|
|||
52
updates.go
Normal file
52
updates.go
Normal file
|
|
@ -0,0 +1,52 @@
|
|||
package loop
|
||||
|
||||
import (
|
||||
"context"
|
||||
|
||||
"github.com/lightninglabs/loop/swap"
|
||||
"github.com/lightningnetwork/lnd/lntypes"
|
||||
)
|
||||
|
||||
// subscribeAndLogUpdates subscribes to updates for a swap and logs them. This
|
||||
// function will block, so should run as a goroutine. Note that our subscription
|
||||
// does not survive server restarts; we will simply not have update logs if the
|
||||
// server restarts during swap execution.
|
||||
func subscribeAndLogUpdates(ctx context.Context, hash lntypes.Hash,
|
||||
log *swap.PrefixLog, subscribe func(context.Context,
|
||||
lntypes.Hash) (<-chan *ServerUpdate, <-chan error, error)) {
|
||||
|
||||
subscribeChan, errChan, err := subscribe(ctx, hash)
|
||||
if err != nil {
|
||||
log.Errorf("could not get swap subscription: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
for {
|
||||
select {
|
||||
// Consume any updates and log them.
|
||||
case update := <-subscribeChan:
|
||||
log.Infof("Server update: %v received, "+
|
||||
"timestamp: %v", update.State, update.Timestamp)
|
||||
|
||||
// If we get an error from the server, we check whether it is
|
||||
// due to server exit, or restart, and log this information
|
||||
// for the client. Otherwise, we just log non-nil errors.
|
||||
case err := <-errChan:
|
||||
switch err {
|
||||
case errServerSubscriptionComplete:
|
||||
log.Infof("swap subscription: %v", err)
|
||||
|
||||
case nil:
|
||||
|
||||
default:
|
||||
log.Errorf("swap subscription error: %v", err)
|
||||
}
|
||||
|
||||
return
|
||||
|
||||
// Exit if our context is cancelled.
|
||||
case <-ctx.Done():
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue