chainregistry+config: add neutrino flag to assert filter header chain

This commit is contained in:
Valentine Wallace 2019-05-24 18:16:33 -07:00 committed by Valentine Wallace
parent 818dbb9e9b
commit 25b540fec4
2 changed files with 45 additions and 6 deletions

@ -19,6 +19,7 @@ import (
"github.com/btcsuite/btcwallet/wallet"
"github.com/btcsuite/btcwallet/walletdb"
"github.com/lightninglabs/neutrino"
"github.com/lightninglabs/neutrino/headerfs"
"github.com/lightningnetwork/lnd/chainntnfs"
"github.com/lightningnetwork/lnd/chainntnfs/bitcoindnotify"
"github.com/lightningnetwork/lnd/chainntnfs/btcdnotify"
@ -705,6 +706,13 @@ func initNeutrinoBackend(chainDir string) (*neutrino.ChainService, func(), error
"database: %v", err)
}
headerStateAssertion, err := parseHeaderStateAssertion(
cfg.NeutrinoMode.AssertFilterHeader,
)
if err != nil {
return nil, nil, err
}
// With the database open, we can now create an instance of the
// neutrino light client. We pass in relevant configuration parameters
// required.
@ -735,6 +743,7 @@ func initNeutrinoBackend(chainDir string) (*neutrino.ChainService, func(), error
return ips, nil
},
AssertFilterHeader: headerStateAssertion,
}
neutrino.MaxPeers = 8
@ -758,3 +767,32 @@ func initNeutrinoBackend(chainDir string) (*neutrino.ChainService, func(), error
return neutrinoCS, cleanUp, nil
}
// parseHeaderStateAssertion parses the user-specified neutrino header state
// into a headerfs.FilterHeader.
func parseHeaderStateAssertion(state string) (*headerfs.FilterHeader, error) {
if len(state) == 0 {
return nil, nil
}
split := strings.Split(state, ":")
if len(split) != 2 {
return nil, fmt.Errorf("header state assertion %v in "+
"unexpected format, expected format height:hash", state)
}
height, err := strconv.ParseUint(split[0], 10, 32)
if err != nil {
return nil, fmt.Errorf("invalid filter header height: %v", err)
}
hash, err := chainhash.NewHashFromStr(split[1])
if err != nil {
return nil, fmt.Errorf("invalid filter header hash: %v", err)
}
return &headerfs.FilterHeader{
Height: uint32(height),
FilterHash: *hash,
}, nil
}

@ -169,12 +169,13 @@ type chainConfig struct {
}
type neutrinoConfig struct {
AddPeers []string `short:"a" long:"addpeer" description:"Add a peer to connect with at startup"`
ConnectPeers []string `long:"connect" description:"Connect only to the specified peers at startup"`
MaxPeers int `long:"maxpeers" description:"Max number of inbound and outbound peers"`
BanDuration time.Duration `long:"banduration" description:"How long to ban misbehaving peers. Valid time units are {s, m, h}. Minimum 1 second"`
BanThreshold uint32 `long:"banthreshold" description:"Maximum allowed ban score before disconnecting and banning misbehaving peers."`
FeeURL string `long:"feeurl" description:"Optional URL for fee estimation. If a URL is not specified, static fees will be used for estimation."`
AddPeers []string `short:"a" long:"addpeer" description:"Add a peer to connect with at startup"`
ConnectPeers []string `long:"connect" description:"Connect only to the specified peers at startup"`
MaxPeers int `long:"maxpeers" description:"Max number of inbound and outbound peers"`
BanDuration time.Duration `long:"banduration" description:"How long to ban misbehaving peers. Valid time units are {s, m, h}. Minimum 1 second"`
BanThreshold uint32 `long:"banthreshold" description:"Maximum allowed ban score before disconnecting and banning misbehaving peers."`
FeeURL string `long:"feeurl" description:"Optional URL for fee estimation. If a URL is not specified, static fees will be used for estimation."`
AssertFilterHeader string `long:"assertfilterheader" description:"Optional filter header in height:hash format to assert the state of neutrino's filter header chain on startup. If the assertion does not hold, then the filter header chain will be re-synced from the genesis block."`
}
type btcdConfig struct {