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Expand on comment for PeekTwoBlocks for posterity

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Signed-off-by: Thane Thomson <connect@thanethomson.com>
This commit is contained in:
Thane Thomson
2022-04-29 17:49:35 -04:00
parent c5db2e9bc4
commit dc6a208f1d
1 changed files with 6 additions and 3 deletions
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9
internal/blocksync/pool.go
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@@ -200,9 +200,12 @@ func (pool *BlockPool) IsCaughtUp() bool {
return pool.height >= (pool.maxPeerHeight - 1)
}
// PeekTwoBlocks returns blocks at pool.height and pool.height+1.
// We need to see the second block's Commit to validate the first block.
// So we peek two blocks at a time.
// PeekTwoBlocks returns blocks at pool.height and pool.height+1. We need to
// see the second block's Commit to validate the first block. So we peek two
// blocks at a time. We return an extended commit, containing vote extensions
// and their associated signatures, as this is critical to consensus in ABCI++
// as we switch from block sync to consensus mode.
//
// The caller will verify the commit.
func (pool *BlockPool) PeekTwoBlocks() (first *types.Block, second *types.Block, firstExtCommit *types.ExtendedCommit) {
pool.mtx.RLock()