lnd.xprv/lntest/btcd.go
2019-05-27 09:29:03 +02:00

112 lines
3.2 KiB
Go

// +build btcd
package lntest
import (
"encoding/hex"
"fmt"
"os"
"github.com/btcsuite/btcd/btcjson"
"github.com/btcsuite/btcd/chaincfg"
"github.com/btcsuite/btcd/integration/rpctest"
"github.com/btcsuite/btcd/rpcclient"
)
// logDir is the name of the temporary log directory.
const logDir = "./.backendlogs"
// perm is used to signal we want to establish a permanent connection using the
// btcd Node API.
//
// NOTE: Cannot be const, since the node API expects a reference.
var perm = "perm"
// BtcdBackendConfig is an implementation of the BackendConfig interface
// backed by a btcd node.
type BtcdBackendConfig struct {
// rpcConfig houses the connection config to the backing btcd instance.
rpcConfig rpcclient.ConnConfig
// harness is the backing btcd instance.
harness *rpctest.Harness
// minerAddr is the p2p address of the miner to connect to.
minerAddr string
}
// GenArgs returns the arguments needed to be passed to LND at startup for
// using this node as a chain backend.
func (b BtcdBackendConfig) GenArgs() []string {
var args []string
encodedCert := hex.EncodeToString(b.rpcConfig.Certificates)
args = append(args, "--bitcoin.node=btcd")
args = append(args, fmt.Sprintf("--btcd.rpchost=%v", b.rpcConfig.Host))
args = append(args, fmt.Sprintf("--btcd.rpcuser=%v", b.rpcConfig.User))
args = append(args, fmt.Sprintf("--btcd.rpcpass=%v", b.rpcConfig.Pass))
args = append(args, fmt.Sprintf("--btcd.rawrpccert=%v", encodedCert))
return args
}
// ConnectMiner is called to establish a connection to the test miner.
func (b BtcdBackendConfig) ConnectMiner() error {
return b.harness.Node.Node(btcjson.NConnect, b.minerAddr, &perm)
}
// DisconnectMiner is called to disconnect the miner.
func (b BtcdBackendConfig) DisconnectMiner() error {
return b.harness.Node.Node(btcjson.NRemove, b.minerAddr, &perm)
}
// Name returns the name of the backend type.
func (b BtcdBackendConfig) Name() string {
return "btcd"
}
// NewBackend starts a new rpctest.Harness and returns a BtcdBackendConfig for
// that node. miner should be set to the P2P address of the miner to connect
// to.
func NewBackend(miner string) (*BtcdBackendConfig, func(), error) {
args := []string{
"--rejectnonstd",
"--txindex",
"--trickleinterval=100ms",
"--debuglevel=debug",
"--logdir=" + logDir,
"--connect=" + miner,
}
netParams := &chaincfg.SimNetParams
chainBackend, err := rpctest.New(netParams, nil, args)
if err != nil {
return nil, nil, fmt.Errorf("unable to create btcd node: %v", err)
}
if err := chainBackend.SetUp(false, 0); err != nil {
return nil, nil, fmt.Errorf("unable to set up btcd backend: %v", err)
}
bd := &BtcdBackendConfig{
rpcConfig: chainBackend.RPCConfig(),
harness: chainBackend,
minerAddr: miner,
}
cleanUp := func() {
chainBackend.TearDown()
// After shutting down the chain backend, we'll make a copy of
// the log file before deleting the temporary log dir.
logFile := logDir + "/" + netParams.Name + "/btcd.log"
err := CopyFile("./output_btcd_chainbackend.log", logFile)
if err != nil {
fmt.Printf("unable to copy file: %v\n", err)
}
if err = os.RemoveAll(logDir); err != nil {
fmt.Printf("Cannot remove dir %s: %v\n", logDir, err)
}
}
return bd, cleanUp, nil
}