From c03a8da93f638e00dd16b83f4551424883181e41 Mon Sep 17 00:00:00 2001 From: Marius van der Wijden Date: Fri, 19 Aug 2022 10:37:53 +0200 Subject: [PATCH] consensus/beacon: check ttd reached on pos blocks (#25552) * consensus/beacon: check ttd reached on pos blocks * consensus/beacon: check ttd reached on pos blocks * consensus/beacon: check ttd reached on pos blocks --- consensus/beacon/consensus.go | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/consensus/beacon/consensus.go b/consensus/beacon/consensus.go index 0397b026f1f05..949c8ad816ce5 100644 --- a/consensus/beacon/consensus.go +++ b/consensus/beacon/consensus.go @@ -114,8 +114,16 @@ func (beacon *Beacon) VerifyHeaders(chain consensus.ChainHeaderReader, headers [ } } - // All the headers have passed the transition point, use new rules. if len(preHeaders) == 0 { + // All the headers are pos headers. Verify that the parent block reached total terminal difficulty. + if reached, _ := IsTTDReached(chain, headers[0].ParentHash, headers[0].Number.Uint64()-1); !reached { + // TTD not reached for the first block, mark subsequent with invalid terminal block + results := make(chan error, len(headers)) + for i := 0; i < len(headers); i++ { + results <- consensus.ErrInvalidTerminalBlock + } + return make(chan struct{}), results + } return beacon.verifyHeaders(chain, headers, nil) }