kaspad/server/p2p/on_block_locator.go
stasatdaglabs f46dec449d [NOD-510] Change all references to Bitcoin to Kaspa (#531)
* [NOD-510] Change coinbase flags to kaspad.

* [NOD-510] Removed superfluous spaces after periods in comments.

* [NOD-510] Rename btcd -> kaspad in the root folder.

* [NOD-510] Rename BtcEncode -> KaspaEncode and BtcDecode -> KaspaDecode.

* [NOD-510] Rename BtcEncode -> KaspaEncode and BtcDecode -> KaspaDecode.

* [NOD-510] Continue renaming btcd -> kaspad.

* [NOD-510] Rename btcjson -> kaspajson.

* [NOD-510] Rename file names inside kaspajson.

* [NOD-510] Rename kaspajson -> jsonrpc.

* [NOD-510] Finish renaming in addrmgr.

* [NOD-510] Rename package btcec to ecc.

* [NOD-510] Finish renaming stuff in blockdag.

* [NOD-510] Rename stuff in cmd.

* [NOD-510] Rename stuff in config.

* [NOD-510] Rename stuff in connmgr.

* [NOD-510] Rename stuff in dagconfig.

* [NOD-510] Rename stuff in database.

* [NOD-510] Rename stuff in docker.

* [NOD-510] Rename stuff in integration.

* [NOD-510] Rename jsonrpc to rpcmodel.

* [NOD-510] Rename stuff in limits.

* [NOD-510] Rename stuff in logger.

* [NOD-510] Rename stuff in mempool.

* [NOD-510] Rename stuff in mining.

* [NOD-510] Rename stuff in netsync.

* [NOD-510] Rename stuff in peer.

* [NOD-510] Rename stuff in release.

* [NOD-510] Rename stuff in rpcclient.

* [NOD-510] Rename stuff in server.

* [NOD-510] Rename stuff in signal.

* [NOD-510] Rename stuff in txscript.

* [NOD-510] Rename stuff in util.

* [NOD-510] Rename stuff in wire.

* [NOD-510] Fix failing tests.

* [NOD-510] Fix merge errors.

* [NOD-510] Fix go vet errors.

* [NOD-510] Remove merged file that's no longer relevant.

* [NOD-510] Add a comment above Op0.

* [NOD-510] Fix some comments referencing Bitcoin Core.

* [NOD-510] Fix some more comments referencing Bitcoin Core.

* [NOD-510] Fix bitcoin -> kaspa.

* [NOD-510] Fix more bitcoin -> kaspa.

* [NOD-510] Fix comments, remove DisconnectBlock in addrindex.

* [NOD-510] Rename KSPD to KASD.

* [NOD-510] Fix comments and user agent.
2019-12-12 15:21:41 +02:00

45 lines
1.5 KiB
Go

package p2p
import (
"github.com/kaspanet/kaspad/peer"
"github.com/kaspanet/kaspad/wire"
)
// OnBlockLocator is invoked when a peer receives a locator kaspa
// message.
func (sp *Peer) OnBlockLocator(_ *peer.Peer, msg *wire.MsgBlockLocator) {
// Find the highest known shared block between the peers, and asks
// the block and its future from the peer. If the block is not
// found, create a lower resolution block locator and send it to
// the peer in order to find it in the next iteration.
dag := sp.server.DAG
if len(msg.BlockLocatorHashes) == 0 {
peerLog.Warnf("Got empty block locator from peer %s",
sp)
return
}
// If the first hash of the block locator is known, it means we found
// the highest shared block.
firstHash := msg.BlockLocatorHashes[0]
if dag.BlockExists(firstHash) {
if dag.IsKnownFinalizedBlock(firstHash) {
peerLog.Debugf("Cannot sync with peer %s because the highest"+
" shared chain block (%s) is below the finality point", sp, firstHash)
sp.server.SyncManager.RemoveFromSyncCandidates(sp.Peer)
return
}
err := sp.server.SyncManager.PushGetBlockInvsOrHeaders(sp.Peer, firstHash)
if err != nil {
peerLog.Errorf("Failed pushing get blocks message for peer %s: %s",
sp, err)
return
}
return
}
startHash, stopHash := dag.FindNextLocatorBoundaries(msg.BlockLocatorHashes)
if startHash == nil {
panic("Couldn't find any unknown hashes in the block locator.")
}
sp.PushGetBlockLocatorMsg(startHash, stopHash)
}