builder

type Builder interface {
	mempool.Mempool
	mempool.BlockTimer
	Network

	// set preferred block on top of which we'll build next
	SetPreference(blockID ids.ID)

	// get preferred block on top of which we'll build next
	Preferred() (snowman.Block, error)

	// AddUnverifiedTx verifier the tx before adding it to mempool
	AddUnverifiedTx(tx *txs.Tx) error

	// BuildBlock is called on timer clock to attempt to create
	// next block
	BuildBlock(context.Context) (snowman.Block, error)

	// Shutdown cleanly shuts Builder down
	Shutdown()
}

type Network interface {
	common.AppHandler

	// GossipTx gossips the transaction to some of the connected peers
	GossipTx(tx *txs.Tx) error
}