143 lines
4.4 KiB
Go
143 lines
4.4 KiB
Go
// +build !bitcoind,!neutrino
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package lntest
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import (
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"encoding/hex"
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"errors"
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"fmt"
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"os"
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"github.com/btcsuite/btcd/btcjson"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcd/integration/rpctest"
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"github.com/btcsuite/btcd/rpcclient"
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)
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// logDirPattern is the pattern of the name of the temporary log directory.
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const logDirPattern = "%s/.backendlogs"
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// temp is used to signal we want to establish a temporary connection using the
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// btcd Node API.
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//
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// NOTE: Cannot be const, since the node API expects a reference.
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var temp = "temp"
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// BtcdBackendConfig is an implementation of the BackendConfig interface
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// backed by a btcd node.
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type BtcdBackendConfig struct {
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// rpcConfig houses the connection config to the backing btcd instance.
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rpcConfig rpcclient.ConnConfig
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// harness is the backing btcd instance.
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harness *rpctest.Harness
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// minerAddr is the p2p address of the miner to connect to.
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minerAddr string
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}
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// A compile time assertion to ensure BtcdBackendConfig meets the BackendConfig
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// interface.
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var _ BackendConfig = (*BtcdBackendConfig)(nil)
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// GenArgs returns the arguments needed to be passed to LND at startup for
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// using this node as a chain backend.
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func (b BtcdBackendConfig) GenArgs() []string {
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var args []string
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encodedCert := hex.EncodeToString(b.rpcConfig.Certificates)
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args = append(args, "--bitcoin.node=btcd")
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args = append(args, fmt.Sprintf("--btcd.rpchost=%v", b.rpcConfig.Host))
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args = append(args, fmt.Sprintf("--btcd.rpcuser=%v", b.rpcConfig.User))
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args = append(args, fmt.Sprintf("--btcd.rpcpass=%v", b.rpcConfig.Pass))
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args = append(args, fmt.Sprintf("--btcd.rawrpccert=%v", encodedCert))
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return args
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}
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// ConnectMiner is called to establish a connection to the test miner.
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func (b BtcdBackendConfig) ConnectMiner() error {
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return b.harness.Client.Node(btcjson.NConnect, b.minerAddr, &temp)
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}
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// DisconnectMiner is called to disconnect the miner.
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func (b BtcdBackendConfig) DisconnectMiner() error {
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return b.harness.Client.Node(btcjson.NDisconnect, b.minerAddr, &temp)
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}
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// Name returns the name of the backend type.
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func (b BtcdBackendConfig) Name() string {
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return "btcd"
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}
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// NewBackend starts a new rpctest.Harness and returns a BtcdBackendConfig for
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// that node. miner should be set to the P2P address of the miner to connect
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// to.
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func NewBackend(miner string, netParams *chaincfg.Params) (
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*BtcdBackendConfig, func() error, error) {
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baseLogDir := fmt.Sprintf(logDirPattern, GetLogDir())
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args := []string{
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"--rejectnonstd",
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"--txindex",
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"--trickleinterval=100ms",
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"--debuglevel=debug",
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"--logdir=" + baseLogDir,
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"--nowinservice",
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// The miner will get banned and disconnected from the node if
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// its requested data are not found. We add a nobanning flag to
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// make sure they stay connected if it happens.
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"--nobanning",
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}
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chainBackend, err := rpctest.New(netParams, nil, args, GetBtcdBinary())
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if err != nil {
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return nil, nil, fmt.Errorf("unable to create btcd node: %v", err)
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}
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// We want to overwrite some of the connection settings to make the
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// tests more robust. We might need to restart the backend while there
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// are already blocks present, which will take a bit longer than the
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// 1 second the default settings amount to. Doubling both values will
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// give us retries up to 4 seconds.
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chainBackend.MaxConnRetries = rpctest.DefaultMaxConnectionRetries * 2
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chainBackend.ConnectionRetryTimeout = rpctest.DefaultConnectionRetryTimeout * 2
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if err := chainBackend.SetUp(false, 0); err != nil {
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return nil, nil, fmt.Errorf("unable to set up btcd backend: %v", err)
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}
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bd := &BtcdBackendConfig{
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rpcConfig: chainBackend.RPCConfig(),
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harness: chainBackend,
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minerAddr: miner,
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}
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cleanUp := func() error {
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var errStr string
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if err := chainBackend.TearDown(); err != nil {
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errStr += err.Error() + "\n"
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}
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// After shutting down the chain backend, we'll make a copy of
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// the log file before deleting the temporary log dir.
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logFile := baseLogDir + "/" + netParams.Name + "/btcd.log"
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logDestination := fmt.Sprintf(
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"%s/output_btcd_chainbackend.log", GetLogDir(),
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)
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err := CopyFile(logDestination, logFile)
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if err != nil {
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errStr += fmt.Sprintf("unable to copy file: %v\n", err)
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}
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if err = os.RemoveAll(baseLogDir); err != nil {
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errStr += fmt.Sprintf(
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"cannot remove dir %s: %v\n", baseLogDir, err,
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)
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}
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if errStr != "" {
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return errors.New(errStr)
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}
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return nil
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}
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return bd, cleanUp, nil
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}
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