common

var (
	// BestBlockHashKey is the db location the hash of the best (unfinalised) block header.
	BestBlockHashKey = []byte("best_hash")
	// LatestStorageHashKey is the db location of the hash of the latest storage trie.
	LatestStorageHashKey = []byte("latest_storage_hash")
	// FinalizedBlockHashKey is the db location of the hash of the latest finalised block header.
	FinalizedBlockHashKey = []byte("finalised_head")
	// GenesisDataKey is the db location of the genesis data.
	GenesisDataKey = []byte("genesis_data")
	// BlockTreeKey is the db location of the encoded block tree structure.
	BlockTreeKey = []byte("block_tree")
	// LatestFinalizedRoundKey is the key where the last finalised grandpa round is stored
	LatestFinalizedRoundKey = []byte("latest_finalised_round")
	// WorkingStorageHashKey is the storage key that the runtime uses to store the latest working state root.
	WorkingStorageHashKey = []byte("working_storage_hash")
	// NodeNameKey is the storage key to store de current node name and avoid create a new name every initialization
	NodeNameKey = []byte("node_name")
	// PruningKey is the storage key to store the current pruning configuration.
	PruningKey = []byte("prune")
	// CodeSubstitutedBlock is the storage key to store block hash of substituted (if there is currently code substituted)
	CodeSubstitutedBlock = []byte("code_substituted_block")
)

var (
	// CodeKey is the key where runtime code is stored in the trie
	CodeKey = []byte(":code")

	// UpgradedToDualRefKey is set to true (0x01) if the account format has been upgraded to v0.9
	// it's set to empty or false (0x00) otherwise
	UpgradedToDualRefKey = MustHexToBytes("0x26aa394eea5630e07c48ae0c9558cef7c21aab032aaa6e946ca50ad39ab66603")
)

var EmptyHash = Hash{}

var ErrNoPrefix = errors.New("could not byteify non 0x prefixed string")