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eth: update comment

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This commit is contained in:
Felix Lange 2025-08-28 12:59:10 +02:00
parent fbe5401006
commit 8ce7159df4
1 changed files with 6 additions and 8 deletions
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14
eth/handler.go
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@ -682,14 +682,12 @@ func (st *blockRangeState) currentRange() eth.BlockRangeUpdatePacket {
return *st.next.Load() return *st.next.Load()
} }
// Send the transaction (if it's small enough) directly to a subset of // broadcastChoice implements a deterministic random choice of peers. This is designed
// the peers that have not received it yet, ensuring that the flow of // specifically for choosing which peer receives a direct broadcast of a transaction.
// transactions is grouped by account to (try and) avoid nonce gaps.
// //
// To do this, we hash the local node ID together with a peer's // The choice is made based on the involved p2p node IDs and the transaction sender,
// node ID together with the transaction sender and broadcast if // ensuring that the flow of transactions is grouped by account to (try and) avoid nonce
// `sha(self, peer, sender) mod peers < sqrt(peers)`. // gaps.
type broadcastChoice struct { type broadcastChoice struct {
self enode.ID self enode.ID
key [16]byte key [16]byte
@ -718,7 +716,7 @@ func newBroadcastChoice(self enode.ID, key [16]byte) *broadcastChoice {
// choosePeers selects the peers that will receive a direct transaction broadcast message. // choosePeers selects the peers that will receive a direct transaction broadcast message.
// Note the return value will only stay valid until the next call to choosePeers. // Note the return value will only stay valid until the next call to choosePeers.
func (bc *broadcastChoice) choosePeers(peers []*ethPeer, txSender common.Address) map[*ethPeer]struct{} { func (bc *broadcastChoice) choosePeers(peers []*ethPeer, txSender common.Address) map[*ethPeer]struct{} {
// Compute scores. // Compute randomized scores.
bc.tmp = slices.Grow(bc.tmp[:0], len(peers))[:len(peers)] bc.tmp = slices.Grow(bc.tmp[:0], len(peers))[:len(peers)]
hash := siphash.New(bc.key[:]) hash := siphash.New(bc.key[:])
for i, peer := range peers { for i, peer := range peers {