consensus/beacon: don't ignore errors

consensus/beacon/consensus.go

@@ -79,7 +79,10 @@ func (beacon *Beacon) Author(header *types.Header) (common.Address, error) {
 // VerifyHeader checks whether a header conforms to the consensus rules of the
 // stock Ethereum consensus engine.
 func (beacon *Beacon) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, seal bool) error {
-	reached, _ := IsTTDReached(chain, header.ParentHash, header.Number.Uint64()-1)
+	reached, err := IsTTDReached(chain, header.ParentHash, header.Number.Uint64()-1)
+	if err != nil {
+		return err
+	}
 	if !reached {
 		return beacon.ethone.VerifyHeader(chain, header, seal)
 	}
@@ -116,11 +119,14 @@ func (beacon *Beacon) VerifyHeaders(chain consensus.ChainHeaderReader, headers [
 
 	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 {
+		if reached, err := IsTTDReached(chain, headers[0].ParentHash, headers[0].Number.Uint64()-1); !reached {
 			// TTD not reached for the first block, mark subsequent with invalid terminal block
+			if err == nil {
+				err = consensus.ErrInvalidTerminalBlock
+			}
 			results := make(chan error, len(headers))
 			for i := 0; i < len(headers); i++ {
-				results <- consensus.ErrInvalidTerminalBlock
+				results <- err
 			}
 			return make(chan struct{}), results
 		}