mirror of
https://github.com/kaspanet/kaspad.git
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44 lines
1.4 KiB
Go
44 lines
1.4 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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// OnGetBlockInvs is invoked when a peer receives a getblockinvs bitcoin
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// message.
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// It finds the blue future between msg.StartHash and msg.StopHash
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// and send the invs to the requesting peer.
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func (sp *Peer) OnGetBlockInvs(_ *peer.Peer, msg *wire.MsgGetBlockInvs) {
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dag := sp.server.DAG
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// We want to prevent a situation where the syncing peer needs
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// to call getblocks once again, but the block we sent him
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// won't affect his selected chain, so next time it'll try
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// to find the highest shared chain block, it'll find the
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// same one as before.
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// To prevent that we use blockdag.FinalityInterval as maxHashes.
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// This way, if one getblocks is not enough to get the peer
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// synced, we can know for sure that its selected chain will
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// change, so we'll have higher shared chain block.
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hashList, err := dag.GetBlueBlocksHashesBetween(msg.StartHash, msg.StopHash,
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wire.MaxInvPerMsg)
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if err != nil {
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log.Warnf("Error getting blue blocks 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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// Generate inventory message.
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invMsg := wire.NewMsgInv()
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for i := range hashList {
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iv := wire.NewInvVect(wire.InvTypeSyncBlock, hashList[i])
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invMsg.AddInvVect(iv)
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}
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// Send the inventory message if there is anything to send.
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if len(invMsg.InvList) > 0 {
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sp.QueueMessage(invMsg, nil)
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}
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}
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