chain

type Block interface {
	snowman.Block
	smblock.WithVerifyContext

	// State intends to return the new chain state following this block's
	// acceptance. The new chain state is built (but not persisted) following a
	// block's verification to allow block's descendants verification before
	// being accepted.
	State() (database.Database, error)
}

type Chain interface {
	LastAccepted() ids.ID
	SetChainState(state snow.State)
	GetBlock(blkID ids.ID) (Block, error)

	// Creates a fully verifiable and executable block, which can be processed
	// by the consensus engine, from a stateless block.
	NewBlock(blk *xsblock.Stateless) (Block, error)
}