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blockchain: explain isCaughtUp logic

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This commit is contained in:
Ethan Buchman
2017-06-23 22:34:38 -04:00
parent 468982ffe4
commit 77a3d03385
1 changed files with 6 additions and 5 deletions
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11
blockchain/pool.go
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@@ -28,7 +28,7 @@ var peerTimeoutSeconds = time.Duration(15) // not const so we can override with
Every so often we ask peers what height they're on so we can keep going.
Requests are continuously made for blocks of higher heights until
the limits. If most of the requests have no available peers, and we
we reach the limits. If most of the requests have no available peers, and we
are not at peer limits, we can probably switch to consensus reactor
*/
@@ -129,8 +129,6 @@ func (pool *BlockPool) IsCaughtUp() bool {
pool.mtx.Lock()
defer pool.mtx.Unlock()
height := pool.height
// Need at least 1 peer to be considered caught up.
if len(pool.peers) == 0 {
pool.Logger.Debug("Blockpool has no peers")
@@ -142,8 +140,11 @@ func (pool *BlockPool) IsCaughtUp() bool {
maxPeerHeight = MaxInt(maxPeerHeight, peer.height)
}
isCaughtUp := (height > 0 || time.Since(pool.startTime) > 5*time.Second) && (maxPeerHeight == 0 || height >= maxPeerHeight)
pool.Logger.Info(Fmt("IsCaughtUp: %v", isCaughtUp), "height", height, "maxPeerHeight", maxPeerHeight)
// some conditions to determine if we're caught up
receivedBlockOrTimedOut := (pool.height > 0 || time.Since(pool.startTime) > 5*time.Second)
ourChainIsLongestAmongPeers := maxPeerHeight == 0 || pool.height >= maxPeerHeight
isCaughtUp := receivedBlockOrTimedOut && ourChainIsLongestAmongPeers
pool.Logger.Info(Fmt("IsCaughtUp: %v", isCaughtUp), "height", pool.height, "maxPeerHeight", maxPeerHeight)
return isCaughtUp
}