From 769657060e888612e7d585c6b6eae16a64c4ad19 Mon Sep 17 00:00:00 2001 From: b00ris Date: Thu, 24 Jan 2019 14:18:26 +0300 Subject: les: implement ultralight client (#16904) For more information about this light client mode, read https://hackmd.io/s/HJy7jjZpm --- core/headerchain.go | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) (limited to 'core') diff --git a/core/headerchain.go b/core/headerchain.go index d2093113c..8904dd887 100644 --- a/core/headerchain.go +++ b/core/headerchain.go @@ -219,14 +219,18 @@ func (hc *HeaderChain) ValidateHeaderChain(chain []*types.Header, checkFreq int) // Generate the list of seal verification requests, and start the parallel verifier seals := make([]bool, len(chain)) - for i := 0; i < len(seals)/checkFreq; i++ { - index := i*checkFreq + hc.rand.Intn(checkFreq) - if index >= len(seals) { - index = len(seals) - 1 + if checkFreq != 0 { + // In case of checkFreq == 0 all seals are left false. + for i := 0; i < len(seals)/checkFreq; i++ { + index := i*checkFreq + hc.rand.Intn(checkFreq) + if index >= len(seals) { + index = len(seals) - 1 + } + seals[index] = true } - seals[index] = true + // Last should always be verified to avoid junk. + seals[len(seals)-1] = true } - seals[len(seals)-1] = true // Last should always be verified to avoid junk abort, results := hc.engine.VerifyHeaders(hc, chain, seals) defer close(abort) -- cgit v1.2.3