mirror of
https://github.com/kaspanet/kaspad.git
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40 lines
1.3 KiB
Go
40 lines
1.3 KiB
Go
package p2p
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import (
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"github.com/kaspanet/kaspad/peer"
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"github.com/kaspanet/kaspad/wire"
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"github.com/prometheus/common/log"
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)
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// OnGetHeaders is invoked when a peer receives a getheaders bitcoin
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// message.
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func (sp *Peer) OnGetHeaders(_ *peer.Peer, msg *wire.MsgGetHeaders) {
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// Ignore getheaders requests if not in sync.
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if !sp.server.SyncManager.IsCurrent() {
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return
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}
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// Find the most recent known block in the best chain based on the block
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// locator and fetch all of the headers after it until either
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// wire.MaxBlockHeadersPerMsg have been fetched or the provided stop
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// hash is encountered.
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//
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// Use the block after the genesis block if no other blocks in the
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// provided locator are known. This does mean the client will start
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// over with the genesis block if unknown block locators are provided.
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dag := sp.server.DAG
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headers, err := dag.GetBlueBlocksHeadersBetween(msg.StartHash, msg.StopHash)
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if err != nil {
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log.Warnf("Error getting blue blocks headers between %s and %s: %s", msg.StartHash, msg.StopHash, err)
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sp.Disconnect()
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return
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}
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// Send found headers to the requesting peer.
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blockHeaders := make([]*wire.BlockHeader, len(headers))
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for i := range headers {
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blockHeaders[i] = headers[i]
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}
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sp.QueueMessage(&wire.MsgHeaders{Headers: blockHeaders}, nil)
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}
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