lnd.xprv/channeldb/payment_control_test.go

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package channeldb
import (
"bytes"
"crypto/rand"
"fmt"
"io"
"io/ioutil"
"reflect"
"testing"
"time"
"github.com/btcsuite/fastsha256"
"github.com/coreos/bbolt"
"github.com/davecgh/go-spew/spew"
"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/routing/route"
)
func initDB() (*DB, error) {
tempPath, err := ioutil.TempDir("", "switchdb")
if err != nil {
return nil, err
}
db, err := Open(tempPath)
if err != nil {
return nil, err
}
return db, err
}
func genPreimage() ([32]byte, error) {
var preimage [32]byte
if _, err := io.ReadFull(rand.Reader, preimage[:]); err != nil {
return preimage, err
}
return preimage, nil
}
func genInfo() (*PaymentCreationInfo, *PaymentAttemptInfo,
lntypes.Preimage, error) {
preimage, err := genPreimage()
if err != nil {
return nil, nil, preimage, fmt.Errorf("unable to "+
"generate preimage: %v", err)
}
rhash := fastsha256.Sum256(preimage[:])
return &PaymentCreationInfo{
PaymentHash: rhash,
Value: 1,
CreationDate: time.Unix(time.Now().Unix(), 0),
PaymentRequest: []byte("hola"),
},
&PaymentAttemptInfo{
PaymentID: 1,
SessionKey: priv,
Route: testRoute,
}, preimage, nil
}
// TestPaymentControlSwitchFail checks that payment status returns to Failed
// status after failing, and that InitPayment allows another HTLC for the
// same payment hash.
func TestPaymentControlSwitchFail(t *testing.T) {
t.Parallel()
db, err := initDB()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, attempt, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Sends base htlc message which initiate StatusInFlight.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, db, info.PaymentHash, info, nil, lntypes.Preimage{},
nil,
)
// Fail the payment, which should moved it to Failed.
failReason := FailureReasonNoRoute
_, err = pControl.Fail(info.PaymentHash, failReason)
if err != nil {
t.Fatalf("unable to fail payment hash: %v", err)
}
// Verify the status is indeed Failed.
assertPaymentStatus(t, db, info.PaymentHash, StatusFailed)
assertPaymentInfo(
t, db, info.PaymentHash, info, nil, lntypes.Preimage{},
&failReason,
)
// Sends the htlc again, which should succeed since the prior payment
// failed.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, db, info.PaymentHash, info, nil, lntypes.Preimage{},
nil,
)
// Record a new attempt.
attempt.PaymentID = 2
err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, db, info.PaymentHash, info, attempt, lntypes.Preimage{},
nil,
)
// Verifies that status was changed to StatusSucceeded.
var route *route.Route
route, err = pControl.Success(info.PaymentHash, preimg)
if err != nil {
t.Fatalf("error shouldn't have been received, got: %v", err)
}
if !reflect.DeepEqual(*route, attempt.Route) {
t.Fatalf("unexpected route returned")
}
assertPaymentStatus(t, db, info.PaymentHash, StatusSucceeded)
assertPaymentInfo(t, db, info.PaymentHash, info, attempt, preimg, nil)
// Attempt a final payment, which should now fail since the prior
// payment succeed.
err = pControl.InitPayment(info.PaymentHash, info)
if err != ErrAlreadyPaid {
t.Fatalf("unable to send htlc message: %v", err)
}
}
// TestPaymentControlSwitchDoubleSend checks the ability of payment control to
// prevent double sending of htlc message, when message is in StatusInFlight.
func TestPaymentControlSwitchDoubleSend(t *testing.T) {
t.Parallel()
db, err := initDB()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, attempt, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Sends base htlc message which initiate base status and move it to
// StatusInFlight and verifies that it was changed.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, db, info.PaymentHash, info, nil, lntypes.Preimage{},
nil,
)
// Try to initiate double sending of htlc message with the same
// payment hash, should result in error indicating that payment has
// already been sent.
err = pControl.InitPayment(info.PaymentHash, info)
if err != ErrPaymentInFlight {
t.Fatalf("payment control wrong behaviour: " +
"double sending must trigger ErrPaymentInFlight error")
}
// Record an attempt.
err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, db, info.PaymentHash, info, attempt, lntypes.Preimage{},
nil,
)
// Sends base htlc message which initiate StatusInFlight.
err = pControl.InitPayment(info.PaymentHash, info)
if err != ErrPaymentInFlight {
t.Fatalf("payment control wrong behaviour: " +
"double sending must trigger ErrPaymentInFlight error")
}
// After settling, the error should be ErrAlreadyPaid.
if _, err := pControl.Success(info.PaymentHash, preimg); err != nil {
t.Fatalf("error shouldn't have been received, got: %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusSucceeded)
assertPaymentInfo(t, db, info.PaymentHash, info, attempt, preimg, nil)
err = pControl.InitPayment(info.PaymentHash, info)
if err != ErrAlreadyPaid {
t.Fatalf("unable to send htlc message: %v", err)
}
}
// TestPaymentControlSuccessesWithoutInFlight checks that the payment
// control will disallow calls to Success when no payment is in flight.
func TestPaymentControlSuccessesWithoutInFlight(t *testing.T) {
t.Parallel()
db, err := initDB()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, _, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Attempt to complete the payment should fail.
_, err = pControl.Success(info.PaymentHash, preimg)
if err != ErrPaymentNotInitiated {
t.Fatalf("expected ErrPaymentNotInitiated, got %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusUnknown)
assertPaymentInfo(
t, db, info.PaymentHash, nil, nil, lntypes.Preimage{},
nil,
)
}
// TestPaymentControlFailsWithoutInFlight checks that a strict payment
// control will disallow calls to Fail when no payment is in flight.
func TestPaymentControlFailsWithoutInFlight(t *testing.T) {
t.Parallel()
db, err := initDB()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, _, _, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Calling Fail should return an error.
_, err = pControl.Fail(info.PaymentHash, FailureReasonNoRoute)
if err != ErrPaymentNotInitiated {
t.Fatalf("expected ErrPaymentNotInitiated, got %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusUnknown)
assertPaymentInfo(
t, db, info.PaymentHash, nil, nil, lntypes.Preimage{}, nil,
)
}
// TestPaymentControlDeleteNonInFlight checks that calling DeletaPayments only
// deletes payments from the database that are not in-flight.
func TestPaymentControlDeleteNonInFligt(t *testing.T) {
t.Parallel()
db, err := initDB()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
payments := []struct {
failed bool
success bool
}{
{
failed: true,
success: false,
},
{
failed: false,
success: true,
},
{
failed: false,
success: false,
},
}
for _, p := range payments {
info, attempt, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Sends base htlc message which initiate StatusInFlight.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
if p.failed {
// Fail the payment, which should moved it to Failed.
failReason := FailureReasonNoRoute
_, err = pControl.Fail(info.PaymentHash, failReason)
if err != nil {
t.Fatalf("unable to fail payment hash: %v", err)
}
// Verify the status is indeed Failed.
assertPaymentStatus(t, db, info.PaymentHash, StatusFailed)
assertPaymentInfo(
t, db, info.PaymentHash, info, attempt,
lntypes.Preimage{}, &failReason,
)
} else if p.success {
// Verifies that status was changed to StatusSucceeded.
_, err := pControl.Success(info.PaymentHash, preimg)
if err != nil {
t.Fatalf("error shouldn't have been received, got: %v", err)
}
assertPaymentStatus(t, db, info.PaymentHash, StatusSucceeded)
assertPaymentInfo(
t, db, info.PaymentHash, info, attempt, preimg, nil,
)
} else {
assertPaymentStatus(t, db, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, db, info.PaymentHash, info, attempt,
lntypes.Preimage{}, nil,
)
}
}
// Delete payments.
if err := db.DeletePayments(); err != nil {
t.Fatal(err)
}
// This should leave the in-flight payment.
dbPayments, err := db.FetchPayments()
if err != nil {
t.Fatal(err)
}
if len(dbPayments) != 1 {
t.Fatalf("expected one payment, got %d", len(dbPayments))
}
status := dbPayments[0].Status
if status != StatusInFlight {
t.Fatalf("expected in-fligth status, got %v", status)
}
}
func assertPaymentStatus(t *testing.T, db *DB,
hash [32]byte, expStatus PaymentStatus) {
t.Helper()
var paymentStatus = StatusUnknown
err := db.View(func(tx *bbolt.Tx) error {
payments := tx.Bucket(paymentsRootBucket)
if payments == nil {
return nil
}
bucket := payments.Bucket(hash[:])
if bucket == nil {
return nil
}
// Get the existing status of this payment, if any.
paymentStatus = fetchPaymentStatus(bucket)
return nil
})
if err != nil {
t.Fatalf("unable to fetch payment status: %v", err)
}
if paymentStatus != expStatus {
t.Fatalf("payment status mismatch: expected %v, got %v",
expStatus, paymentStatus)
}
}
func checkPaymentCreationInfo(bucket *bbolt.Bucket, c *PaymentCreationInfo) error {
b := bucket.Get(paymentCreationInfoKey)
switch {
case b == nil && c == nil:
return nil
case b == nil:
return fmt.Errorf("expected creation info not found")
case c == nil:
return fmt.Errorf("unexpected creation info found")
}
r := bytes.NewReader(b)
c2, err := deserializePaymentCreationInfo(r)
if err != nil {
fmt.Println("creation info err: ", err)
return err
}
if !reflect.DeepEqual(c, c2) {
return fmt.Errorf("PaymentCreationInfos don't match: %v vs %v",
spew.Sdump(c), spew.Sdump(c2))
}
return nil
}
func checkPaymentAttemptInfo(bucket *bbolt.Bucket, a *PaymentAttemptInfo) error {
b := bucket.Get(paymentAttemptInfoKey)
switch {
case b == nil && a == nil:
return nil
case b == nil:
return fmt.Errorf("expected attempt info not found")
case a == nil:
return fmt.Errorf("unexpected attempt info found")
}
r := bytes.NewReader(b)
a2, err := deserializePaymentAttemptInfo(r)
if err != nil {
return err
}
if !reflect.DeepEqual(a, a2) {
return fmt.Errorf("PaymentAttemptInfos don't match: %v vs %v",
spew.Sdump(a), spew.Sdump(a2))
}
return nil
}
func checkSettleInfo(bucket *bbolt.Bucket, preimg lntypes.Preimage) error {
zero := lntypes.Preimage{}
b := bucket.Get(paymentSettleInfoKey)
switch {
case b == nil && preimg == zero:
return nil
case b == nil:
return fmt.Errorf("expected preimage not found")
case preimg == zero:
return fmt.Errorf("unexpected preimage found")
}
var pre2 lntypes.Preimage
copy(pre2[:], b[:])
if preimg != pre2 {
return fmt.Errorf("Preimages don't match: %x vs %x",
preimg, pre2)
}
return nil
}
func checkFailInfo(bucket *bbolt.Bucket, failReason *FailureReason) error {
b := bucket.Get(paymentFailInfoKey)
switch {
case b == nil && failReason == nil:
return nil
case b == nil:
return fmt.Errorf("expected fail info not found")
case failReason == nil:
return fmt.Errorf("unexpected fail info found")
}
failReason2 := FailureReason(b[0])
if *failReason != failReason2 {
return fmt.Errorf("Failure infos don't match: %v vs %v",
*failReason, failReason2)
}
return nil
}
func assertPaymentInfo(t *testing.T, db *DB, hash lntypes.Hash,
c *PaymentCreationInfo, a *PaymentAttemptInfo, s lntypes.Preimage,
f *FailureReason) {
t.Helper()
err := db.View(func(tx *bbolt.Tx) error {
payments := tx.Bucket(paymentsRootBucket)
if payments == nil && c == nil {
return nil
}
if payments == nil {
return fmt.Errorf("sent payments not found")
}
bucket := payments.Bucket(hash[:])
if bucket == nil && c == nil {
return nil
}
if bucket == nil {
return fmt.Errorf("payment not found")
}
if err := checkPaymentCreationInfo(bucket, c); err != nil {
return err
}
if err := checkPaymentAttemptInfo(bucket, a); err != nil {
return err
}
if err := checkSettleInfo(bucket, s); err != nil {
return err
}
if err := checkFailInfo(bucket, f); err != nil {
return err
}
return nil
})
if err != nil {
t.Fatalf("assert payment info failed: %v", err)
}
}