Method insert

core/blockchain.go:620–637

insert injects a new head block into the current block chain. This method assumes that the block is indeed a true head. It will also reset the head header and the head fast sync block to this very same block if they are older or if they are on a different side chain. Note, this function assumes tha

(block *types.Block)

//
// Note, this function assumes that the `mu` mutex is held!
func (bc *BlockChain) insert(block *types.Block) {
	// If the block is on a side chain or an unknown one, force other heads onto it too
	updateHeads := rawdb.ReadCanonicalHash(bc.db, block.NumberU64()) != block.Hash()

	// Add the block to the canonical chain number scheme and mark as the head
	rawdb.WriteCanonicalHash(bc.db, block.Hash(), block.NumberU64())
	rawdb.WriteHeadBlockHash(bc.db, block.Hash())

	bc.currentBlock.Store(block)

	// If the block is better than our head or is on a different chain, force update heads
	if updateHeads {
		bc.hc.SetCurrentHeader(block.Header())
		rawdb.WriteHeadFastBlockHash(bc.db, block.Hash())

		bc.currentFastBlock.Store(block)
	}
}

// Genesis retrieves the chain's genesis block.
func (bc *BlockChain) Genesis() *types.Block {