diff --git a/consensus/beacon/consensus.go b/consensus/beacon/consensus.go index 0397b026f1..949c8ad816 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) }