blockchain

type Blockchain interface {
	// Read locker
	sync.Locker
	Root
	Tip
	// Returns an immutable copy of the tip
	Tip() Tip
	// Returns a copy of the current validator set
	Validators() []acm.Validator
}

type MutableBlockchain interface {
	Blockchain
	CommitBlock(blockTime time.Time, blockHash, appHash []byte) error
}

type PersistedState struct {
	AppHashAfterLastBlock []byte
	LastBlockHeight       uint64
	GenesisDoc            genesis.GenesisDoc
}

type Root interface {
	// GenesisHash precomputed from GenesisDoc
	GenesisHash() []byte
	GenesisDoc() genesis.GenesisDoc
}

type Tip interface {
	// ChainID precomputed from GenesisDoc
	ChainID() string
	// All Last* references are to the block last committed
	LastBlockHeight() uint64
	LastBlockTime() time.Time
	LastBlockHash() []byte
	// Note this is the hash of the application state after the most recently committed block's transactions executed
	// and so lastBlock.Header.AppHash will be one block older than our AppHashAfterLastBlock (i.e. Tendermint closes
	// the AppHash we return from ABCI Commit into the _next_ block)
	AppHashAfterLastBlock() []byte
}