add GenesisHeader to ChainHeaderReader

consensus/consensus.go

@@ -38,6 +38,9 @@ type ChainHeaderReader interface {
 	// Config retrieves the blockchain's chain configuration.
 	Config() *params.ChainConfig
 
+	// GenesisHeader retrieves the chain's genesis block header.
+	GenesisHeader() *types.Header
+
 	// CurrentHeader retrieves the current header from the local chain.
 	CurrentHeader() *types.Header
 

consensus/parlia/parlia.go

@@ -975,8 +975,7 @@ func (p *Parlia) Prepare(chain consensus.ChainHeaderReader, header *types.Header
 	}
 
 	header.Extra = header.Extra[:extraVanity-nextForkHashSize]
-	genesisTime := chain.GetHeader(p.genesisHash, 0).Time
-	nextForkHash := forkid.NextForkHash(p.chainConfig, p.genesisHash, genesisTime, number, header.Time)
+	nextForkHash := forkid.NextForkHash(p.chainConfig, p.genesisHash, chain.GenesisHeader().Time, number, header.Time)
 	header.Extra = append(header.Extra, nextForkHash[:]...)
 
 	if err := p.prepareValidators(header); err != nil {
@@ -1117,8 +1116,7 @@ func (p *Parlia) Finalize(chain consensus.ChainHeaderReader, header *types.Heade
 	if err != nil {
 		return err
 	}
-	genesisTime := chain.GetHeader(p.genesisHash, 0).Time
-	nextForkHash := forkid.NextForkHash(p.chainConfig, p.genesisHash, genesisTime, number, header.Time)
+	nextForkHash := forkid.NextForkHash(p.chainConfig, p.genesisHash, chain.GenesisHeader().Time, number, header.Time)
 	if !snap.isMajorityFork(hex.EncodeToString(nextForkHash[:])) {
 		log.Debug("there is a possible fork, and your client is not the majority. Please check...", "nextForkHash", hex.EncodeToString(nextForkHash[:]))
 	}

core/blockchain_reader.go

@@ -418,6 +418,11 @@ func (bc *BlockChain) Genesis() *types.Block {
 	return bc.genesisBlock
 }
 
+// GenesisHeader retrieves the chain's genesis block header.
+func (bc *BlockChain) GenesisHeader() *types.Header {
+	return bc.genesisBlock.Header()
+}
+
 // TxIndexProgress returns the transaction indexing progress.
 func (bc *BlockChain) TxIndexProgress() (TxIndexProgress, error) {
 	if bc.txIndexer == nil {

core/chain_makers.go

@@ -569,6 +569,10 @@ func (cm *chainMaker) GetHeaderByHash(hash common.Hash) *types.Header {
 	return b.Header()
 }
 
+func (cm *chainMaker) GenesisHeader() *types.Header {
+	panic("not supported")
+}
+
 func (cm *chainMaker) GetHeader(hash common.Hash, number uint64) *types.Header {
 	return cm.GetHeaderByNumber(number)
 }

core/headerchain.go

@@ -134,6 +134,10 @@ func (hc *HeaderChain) getFinalizedNumber(header *types.Header) uint64 {
 	return 0
 }
 
+func (hc *HeaderChain) GenesisHeader() *types.Header {
+	panic("not supported")
+}
+
 // GetBlockNumber retrieves the block number belonging to the given hash
 // from the cache or database
 func (hc *HeaderChain) GetBlockNumber(hash common.Hash) *uint64 {