func testBatchConfirmationNotification(miner *rpctest.Harness,
notifier chainntnfs.ChainNotifier, t *testing.T) {
// We'd like to test a case of serving notifiations to multiple
// clients, each requesting to be notified once a txid receives
// various numbers of confirmations.
confSpread := [6]uint32{1, 2, 3, 6, 20, 22}
confIntents := make([]*chainntnfs.ConfirmationEvent, len(confSpread))
// Create a new txid spending miner coins for each confirmation entry
// in confSpread, we collect each conf intent into a slice so we can
// verify they're each notified at the proper number of confirmations
// below.
for i, numConfs := range confSpread {
txid, err := getTestTxId(miner)
if err != nil {
t.Fatalf("unable to create test addr: %v", err)
}
confIntent, err := notifier.RegisterConfirmationsNtfn(txid, numConfs)
if err != nil {
t.Fatalf("unable to register ntfn: %v", err)
}
confIntents[i] = confIntent
}
// Now, for each confirmation intent, generate the delta number of blocks
// needed to trigger the confirmation notification. A goroutine is
// spawned in order to verify the proper notification is triggered.
for i, numConfs := range confSpread {
var blocksToGen uint32
// If this is the last instance, manually index to generate the
// proper block delta in order to avoid a panic.
if i == len(confSpread)-1 {
blocksToGen = confSpread[len(confSpread)-1] - confSpread[len(confSpread)-2]
} else {
blocksToGen = confSpread[i+1] - confSpread[i]
}
// Generate the number of blocks necessary to trigger this
// current confirmation notification.
if _, err := miner.Node.Generate(blocksToGen); err != nil {
t.Fatalf("unable to generate single block: %v", err)
}
confSent := make(chan int32)
go func() {
confSent <- <-confIntents[i].Confirmed
}()
select {
case <-confSent:
continue
case <-time.After(2 * time.Second):
t.Fatalf("confirmation notification never received: %v", numConfs)
}
}
}
func testMultiClientConfirmationNotification(miner *rpctest.Harness,
notifier chainntnfs.ChainNotifier, t *testing.T) {
// TODO(roasbeef): test various conf targets w/ same txid
// We'd like to test the case of a multiple clients registered to
// receive a confirmation notification for the same transaction.
txid, err := getTestTxId(miner)
if err != nil {
t.Fatalf("unable to create test tx: %v", err)
}
var wg sync.WaitGroup
const numConfsClients = 5
const numConfs = 1
// Register for a conf notification for the above generated txid with
// numConfsClients distinct clients.
for i := 0; i < numConfsClients; i++ {
confClient, err := notifier.RegisterConfirmationsNtfn(txid, numConfs)
if err != nil {
t.Fatalf("unable to register for confirmation: %v", err)
}
wg.Add(1)
go func() {
<-confClient.Confirmed
wg.Done()
}()
}
confsSent := make(chan struct{})
go func() {
wg.Wait()
close(confsSent)
}()
// Finally, generate a single block which should trigger the unblocking
// of all numConfsClients blocked on the channel read above.
if _, err := miner.Node.Generate(1); err != nil {
t.Fatalf("unable to generate block: %v", err)
}
select {
case <-confsSent:
case <-time.After(2 * time.Second):
t.Fatalf("all confirmation notifications not sent")
}
}
func testSingleConfirmationNotification(miner *rpctest.Harness,
notifier chainntnfs.ChainNotifier, t *testing.T) {
// We'd like to test the case of being notified once a txid reaches
// a *single* confirmation.
//
// So first, let's send some coins to "ourself", obtainig a txid.
// We're spending from a coinbase output here, so we use the dedicated
// function.
txid, err := getTestTxId(miner)
if err != nil {
t.Fatalf("unable to create test tx: %v", err)
}
// Now that we have a txid, register a confirmation notiication with
// the chainntfn source.
numConfs := uint32(1)
confIntent, err := notifier.RegisterConfirmationsNtfn(txid, numConfs)
if err != nil {
t.Fatalf("unable to register ntfn: %v", err)
}
// Now generate a single block, the transaction should be included which
// should trigger a notification event.
if _, err := miner.Node.Generate(1); err != nil {
t.Fatalf("unable to generate single block: %v", err)
}
confSent := make(chan int32)
go func() {
confSent <- <-confIntent.Confirmed
}()
select {
case <-confSent:
break
case <-time.After(2 * time.Second):
t.Fatalf("confirmation notification never received")
}
}
func testMultiConfirmationNotification(miner *rpctest.Harness,
notifier chainntnfs.ChainNotifier, t *testing.T) {
// We'd like to test the case of being notified once a txid reaches
// N confirmations, where N > 1.
//
// Again, we'll begin by creating a fresh transaction, so we can obtain a fresh txid.
txid, err := getTestTxId(miner)
if err != nil {
t.Fatalf("unable to create test addr: %v", err)
}
numConfs := uint32(6)
confIntent, err := notifier.RegisterConfirmationsNtfn(txid, numConfs)
if err != nil {
t.Fatalf("unable to register ntfn: %v", err)
}
// Now generate a six blocks. The transaction should be included in the
// first block, which will be built upon by the other 5 blocks.
if _, err := miner.Node.Generate(6); err != nil {
t.Fatalf("unable to generate single block: %v", err)
}
confSent := make(chan int32)
go func() {
confSent <- <-confIntent.Confirmed
}()
select {
case <-confSent:
break
case <-time.After(2 * time.Second):
t.Fatalf("confirmation notification never received")
}
}
