4d1a1d2799
This commit refactors the existing chainntnfns package in order to allow more easily allow integration into the main system, by allowing one to gain access to a set of end-to-end tests for a particular ChainNotifier implementation. In order to achieve this, the existing set of tests for the only concrete implementation (`BtcdNoitifer`) have been refactored to test against all “registered” notifier interfaces registered. This is achieved by creating the concept of a “driver” for each concrete `ChainNotifer` implementation. Once a the package of a particular driver is imported, solely for the side effects, the init() method automatically registers the driver. Additionally, the documentation in various areas of the package have been cleaned up a bit.
343 lines
10 KiB
Go
343 lines
10 KiB
Go
package chainntnfs_test
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import (
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"bytes"
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"testing"
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"time"
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"github.com/lightningnetwork/lnd/chainntnfs"
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_ "github.com/lightningnetwork/lnd/chainntnfs/btcdnotify"
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"github.com/roasbeef/btcd/btcec"
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"github.com/roasbeef/btcd/chaincfg"
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"github.com/roasbeef/btcd/rpctest"
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"github.com/roasbeef/btcd/txscript"
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"github.com/roasbeef/btcd/wire"
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"github.com/roasbeef/btcutil"
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)
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var (
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testPrivKey = []byte{
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0x81, 0xb6, 0x37, 0xd8, 0xfc, 0xd2, 0xc6, 0xda,
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0x63, 0x59, 0xe6, 0x96, 0x31, 0x13, 0xa1, 0x17,
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0xd, 0xe7, 0x95, 0xe4, 0xb7, 0x25, 0xb8, 0x4d,
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0x1e, 0xb, 0x4c, 0xfd, 0x9e, 0xc5, 0x8c, 0xe9,
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}
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netParams = &chaincfg.SimNetParams
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privKey, pubKey = btcec.PrivKeyFromBytes(btcec.S256(), testPrivKey)
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addrPk, _ = btcutil.NewAddressPubKey(pubKey.SerializeCompressed(),
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netParams)
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testAddr = addrPk.AddressPubKeyHash()
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)
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func getTestTxId(miner *rpctest.Harness) (*wire.ShaHash, error) {
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script, err := txscript.PayToAddrScript(testAddr)
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if err != nil {
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return nil, err
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}
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outputs := []*wire.TxOut{&wire.TxOut{2e8, script}}
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return miner.CoinbaseSpend(outputs)
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}
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func testSingleConfirmationNotification(miner *rpctest.Harness,
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notifier chainntnfs.ChainNotifier, t *testing.T) {
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// We'd like to test the case of being notified once a txid reaches
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// a *single* confirmation.
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//
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// So first, let's send some coins to "ourself", obtainig a txid.
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// We're spending from a coinbase output here, so we use the dedicated
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// function.
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txid, err := getTestTxId(miner)
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if err != nil {
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t.Fatalf("unable to create test addr: %v", err)
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}
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// Now that we have a txid, register a confirmation notiication with
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// the chainntfn source.
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numConfs := uint32(1)
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confIntent, err := notifier.RegisterConfirmationsNtfn(txid, numConfs)
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if err != nil {
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t.Fatalf("unable to register ntfn: %v", err)
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}
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// Now generate a single block, the transaction should be included which
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// should trigger a notification event.
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if _, err := miner.Node.Generate(1); err != nil {
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t.Fatalf("unable to generate single block: %v", err)
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}
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confSent := make(chan int32)
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go func() {
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confSent <- <-confIntent.Confirmed
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}()
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select {
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case <-confSent:
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break
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case <-time.After(2 * time.Second):
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t.Fatalf("confirmation notification never received")
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}
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}
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func testMultiConfirmationNotification(miner *rpctest.Harness,
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notifier chainntnfs.ChainNotifier, t *testing.T) {
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// We'd like to test the case of being notified once a txid reaches
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// N confirmations, where N > 1.
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//
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// Again, we'll begin by creating a fresh transaction, so we can obtain a fresh txid.
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txid, err := getTestTxId(miner)
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if err != nil {
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t.Fatalf("unable to create test addr: %v", err)
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}
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numConfs := uint32(6)
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confIntent, err := notifier.RegisterConfirmationsNtfn(txid, numConfs)
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if err != nil {
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t.Fatalf("unable to register ntfn: %v", err)
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}
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// Now generate a six blocks. The transaction should be included in the
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// first block, which will be built upon by the other 5 blocks.
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if _, err := miner.Node.Generate(6); err != nil {
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t.Fatalf("unable to generate single block: %v", err)
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}
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confSent := make(chan int32)
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go func() {
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confSent <- <-confIntent.Confirmed
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}()
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select {
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case <-confSent:
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break
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case <-time.After(2 * time.Second):
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t.Fatalf("confirmation notification never received")
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}
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}
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func testBatchConfirmationNotification(miner *rpctest.Harness,
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notifier chainntnfs.ChainNotifier, t *testing.T) {
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// We'd like to test a case of serving notifiations to multiple
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// clients, each requesting to be notified once a txid receives
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// various numbers of confirmations.
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confSpread := [6]uint32{1, 2, 3, 6, 20, 22}
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confIntents := make([]*chainntnfs.ConfirmationEvent, len(confSpread))
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// Create a new txid spending miner coins for each confirmation entry
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// in confSpread, we collect each conf intent into a slice so we can
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// verify they're each notified at the proper number of confirmations
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// below.
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for i, numConfs := range confSpread {
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txid, err := getTestTxId(miner)
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if err != nil {
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t.Fatalf("unable to create test addr: %v", err)
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}
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confIntent, err := notifier.RegisterConfirmationsNtfn(txid, numConfs)
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if err != nil {
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t.Fatalf("unable to register ntfn: %v", err)
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}
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confIntents[i] = confIntent
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}
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// Now, for each confirmation intent, generate the delta number of blocks
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// needed to trigger the confirmation notification. A goroutine is
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// spawned in order to verify the proper notification is triggered.
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for i, numConfs := range confSpread {
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var blocksToGen uint32
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// If this is the last instance, manually index to generate the
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// proper block delta in order to avoid a panic.
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if i == len(confSpread)-1 {
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blocksToGen = confSpread[len(confSpread)-1] - confSpread[len(confSpread)-2]
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} else {
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blocksToGen = confSpread[i+1] - confSpread[i]
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}
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// Generate the number of blocks necessary to trigger this
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// current confirmation notification.
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if _, err := miner.Node.Generate(blocksToGen); err != nil {
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t.Fatalf("unable to generate single block: %v", err)
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}
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confSent := make(chan int32)
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go func() {
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confSent <- <-confIntents[i].Confirmed
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}()
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select {
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case <-confSent:
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continue
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case <-time.After(2 * time.Second):
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t.Fatalf("confirmation notification never received: %v", numConfs)
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}
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}
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}
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func testSpendNotification(miner *rpctest.Harness,
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notifier chainntnfs.ChainNotifier, t *testing.T) {
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// We'd like to test the spend notifiations for all
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// ChainNotifier concrete implemenations.
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//
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// To do so, we first create a new output to our test target
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// address.
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txid, err := getTestTxId(miner)
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if err != nil {
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t.Fatalf("unable to create test addr: %v", err)
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}
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// Mine a single block which should include that txid above.
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if _, err := miner.Node.Generate(1); err != nil {
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t.Fatalf("unable to generate single block: %v", err)
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}
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// Now that we have the txid, fetch the transaction itself.
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wrappedTx, err := miner.Node.GetRawTransaction(txid)
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if err != nil {
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t.Fatalf("unable to get new tx: %v", err)
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}
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tx := wrappedTx.MsgTx()
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// Locate the output index sent to us. We need this so we can
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// construct a spending txn below.
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outIndex := -1
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var pkScript []byte
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for i, txOut := range tx.TxOut {
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if bytes.Contains(txOut.PkScript, testAddr.ScriptAddress()) {
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pkScript = txOut.PkScript
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outIndex = i
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break
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}
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}
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if outIndex == -1 {
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t.Fatalf("unable to locate new output")
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}
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// Now that we've found the output index, register for a spentness
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// notification for the newly created output.
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outpoint := wire.NewOutPoint(txid, uint32(outIndex))
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spentIntent, err := notifier.RegisterSpendNtfn(outpoint)
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if err != nil {
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t.Fatalf("unable to register for spend ntfn: %v", err)
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}
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// Next, create a new transaction spending that output.
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spendingTx := wire.NewMsgTx()
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spendingTx.AddTxIn(&wire.TxIn{
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PreviousOutPoint: *outpoint,
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})
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spendingTx.AddTxOut(&wire.TxOut{
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Value: 1e8,
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PkScript: pkScript,
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})
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sigScript, err := txscript.SignatureScript(spendingTx, 0, pkScript,
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txscript.SigHashAll, privKey, true)
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if err != nil {
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t.Fatalf("unable to sign tx: %v", err)
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}
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spendingTx.TxIn[0].SignatureScript = sigScript
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// Broadcast our spending transaction.
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spenderSha, err := miner.Node.SendRawTransaction(spendingTx, true)
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if err != nil {
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t.Fatalf("unable to brodacst tx: %v", err)
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}
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// Now we mine a single block, which should include our spend. The
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// notification should also be sent off.
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if _, err := miner.Node.Generate(1); err != nil {
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t.Fatalf("unable to generate single block: %v", err)
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}
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spentNtfn := make(chan *chainntnfs.SpendDetail)
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go func() {
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spentNtfn <- <-spentIntent.Spend
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}()
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select {
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case ntfn := <-spentNtfn:
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// We've received the spend nftn. So now verify all the fields
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// have been set properly.
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if ntfn.SpentOutPoint != outpoint {
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t.Fatalf("ntfn includes wrong output, reports %v instead of %v",
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ntfn.SpentOutPoint, outpoint)
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}
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if !bytes.Equal(ntfn.SpenderTxHash.Bytes(), spenderSha.Bytes()) {
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t.Fatalf("ntfn includes wrong spender tx sha, reports %v intead of %v",
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ntfn.SpenderTxHash.Bytes(), spenderSha.Bytes())
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}
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if ntfn.SpenderInputIndex != 0 {
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t.Fatalf("ntfn includes wrong spending input index, reports %v, should be %v",
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ntfn.SpenderInputIndex, 0)
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}
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case <-time.After(2 * time.Second):
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t.Fatalf("spend ntfn never received")
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}
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}
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var ntfnTests = []func(node *rpctest.Harness, notifier chainntnfs.ChainNotifier, t *testing.T){
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testSingleConfirmationNotification,
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testMultiConfirmationNotification,
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testBatchConfirmationNotification,
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testSpendNotification,
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}
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// TestInterfaces tests all registered interfaces with a unified set of tests
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// which excersie each of the required methods found within the ChainNotifier
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// interface.
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//
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// NOTE: In the future, when additional implementations of the ChainNotifier
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// interface have been implemented, in order to ensure the new concrete
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// implementation is automatically tested, two steps must be undertaken. First,
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// one needs add a "non-captured" (_) import from the new sub-package. This
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// import should trigger an init() method within the package which registeres
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// the interface. Second, an additional case in the switch within the main loop
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// below needs to be added which properly initializes the interface.
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func TestInterfaces(t *testing.T) {
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// Initialize the harness around a btcd node which will serve as our
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// dedicated miner to generate blocks, cause re-orgs, etc. We'll set up
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// this node with a chain length of 125, so we have plentyyy of BTC to
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// play around with.
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miner, err := rpctest.New(netParams, nil, nil)
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if err != nil {
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t.Fatalf("unable to create mining node: %v", err)
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}
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defer miner.TearDown()
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if err := miner.SetUp(true, 25); err != nil {
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t.Fatalf("unable to set up mining node: %v", err)
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}
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rpcConfig := miner.RPCConfig()
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var notifier chainntnfs.ChainNotifier
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for _, notifierDriver := range chainntnfs.RegisteredNotifiers() {
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notifierType := notifierDriver.NotifierType
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switch notifierType {
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case "btcd":
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notifier, err = notifierDriver.New(&rpcConfig)
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if err != nil {
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t.Fatalf("unable to create %v notifier: %v",
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notifierType, err)
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}
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}
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if err := notifier.Start(); err != nil {
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t.Fatalf("unable to start notifier %v: %v",
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notifierType, err)
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}
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for _, ntfnTest := range ntfnTests {
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ntfnTest(miner, notifier, t)
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}
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notifier.Stop()
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}
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}
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