diff --git a/core/blockchain.go b/core/blockchain.go
index 180f74fc11c9..53d0ab358774 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -190,9 +190,10 @@ func DefaultCacheConfigWithScheme(scheme string) *CacheConfig {
 type BlockchainLogger interface {
 	vm.EVMLogger
 	state.StateLogger
+	OnBlockchainInit(chainConfig *params.ChainConfig)
 	// OnBlockStart is called before executing `block`.
 	// `td` is the total difficulty prior to `block`.
-	OnBlockStart(block *types.Block, td *big.Int, finalized *types.Header, safe *types.Header, chainConfig *params.ChainConfig)
+	OnBlockStart(block *types.Block, td *big.Int, finalized *types.Header, safe *types.Header)
 	OnBlockEnd(err error)
 	OnGenesisBlock(genesis *types.Block, alloc GenesisAlloc)
 	OnBeaconBlockRootStart(root common.Hash)
@@ -502,6 +503,9 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 		}
 		rawdb.WriteChainConfig(db, genesisHash, chainConfig)
 	}
+	if bc.logger != nil {
+		bc.logger.OnBlockchainInit(chainConfig)
+	}
 	// Start tx indexer if it's enabled.
 	if txLookupLimit != nil {
 		bc.txIndexer = newTxIndexer(*txLookupLimit, bc)
@@ -1762,7 +1766,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, setHead bool) (int, error)
 			}
 			stats.processed++
 			if bc.logger != nil {
-				bc.logger.OnBlockStart(block, bc.GetTd(block.ParentHash(), block.NumberU64()-1), bc.CurrentFinalBlock(), bc.CurrentSafeBlock(), bc.chainConfig)
+				bc.logger.OnBlockStart(block, bc.GetTd(block.ParentHash(), block.NumberU64()-1), bc.CurrentFinalBlock(), bc.CurrentSafeBlock())
 				bc.logger.OnBlockEnd(nil)
 			}
 
@@ -1891,7 +1895,7 @@ type blockProcessingResult struct {
 func (bc *BlockChain) processBlock(block *types.Block, statedb *state.StateDB, start time.Time, setHead bool) (_ *blockProcessingResult, blockEndErr error) {
 	if bc.logger != nil {
 		td := bc.GetTd(block.ParentHash(), block.NumberU64()-1)
-		bc.logger.OnBlockStart(block, td, bc.CurrentFinalBlock(), bc.CurrentSafeBlock(), bc.chainConfig)
+		bc.logger.OnBlockStart(block, td, bc.CurrentFinalBlock(), bc.CurrentSafeBlock())
 		defer func() {
 			bc.logger.OnBlockEnd(blockEndErr)
 		}()
diff --git a/eth/tracers/live/printer.go b/eth/tracers/live/printer.go
index fc6e75900535..34e137e928c7 100644
--- a/eth/tracers/live/printer.go
+++ b/eth/tracers/live/printer.go
@@ -84,7 +84,7 @@ func (p *Printer) CaptureTxEnd(receipt *types.Receipt, err error) {
 	fmt.Printf("CaptureTxEnd: receipt=%s\n", buf)
 }
 
-func (p *Printer) OnBlockStart(b *types.Block, td *big.Int, finalized, safe *types.Header, _ *params.ChainConfig) {
+func (p *Printer) OnBlockStart(b *types.Block, td *big.Int, finalized, safe *types.Header) {
 	if finalized != nil && safe != nil {
 		fmt.Printf("OnBlockStart: b=%v, td=%v, finalized=%v, safe=%v\n", b.NumberU64(), td, finalized.Number.Uint64(), safe.Number.Uint64())
 	} else {
@@ -96,6 +96,10 @@ func (p *Printer) OnBlockEnd(err error) {
 	fmt.Printf("OnBlockEnd: err=%v\n", err)
 }
 
+func (p *Printer) OnBlockchainInit(chainConfig *params.ChainConfig) {
+	fmt.Printf("OnBlockchainInit: chainConfig=%v\n", chainConfig)
+}
+
 func (p *Printer) OnGenesisBlock(b *types.Block, alloc core.GenesisAlloc) {
 	fmt.Printf("OnGenesisBlock: b=%v, allocLength=%d\n", b.NumberU64(), len(alloc))
 }