hostdb

Documentation

Overview

Package hostdb provides a HostDB object that implements the renter.hostDB interface. The blockchain is scanned for host announcements and hosts that are found get added to the host database. The database continually scans the set of hosts it has found and updates who is online.

Index

• Variables
• type HostDB
  • func New(g modules.Gateway, cs modules.ConsensusSet, persistDir string) (*HostDB, error)
  • func NewCustomHostDB(g modules.Gateway, cs modules.ConsensusSet, persistDir string, ...) (*HostDB, error)
  • func (hdb *HostDB) ActiveHosts() (activeHosts []modules.HostDBEntry)
  • func (hdb *HostDB) AllHosts() (allHosts []modules.HostDBEntry)
  • func (hdb *HostDB) AverageContractPrice() (totalPrice types.Currency)
  • func (hdb *HostDB) CheckForIPViolations(hosts []types.SiaPublicKey) []types.SiaPublicKey
  • func (hdb *HostDB) Close() error
  • func (hdb *HostDB) EstimateHostScore(entry modules.HostDBEntry, allowance modules.Allowance) modules.HostScoreBreakdown
  • func (hdb *HostDB) Host(spk types.SiaPublicKey) (modules.HostDBEntry, bool)
  • func (hdb *HostDB) IncrementFailedInteractions(key types.SiaPublicKey)
  • func (hdb *HostDB) IncrementSuccessfulInteractions(key types.SiaPublicKey)
  • func (hdb *HostDB) InitialScanComplete() (complete bool, err error)
  • func (hdb *HostDB) ProcessConsensusChange(cc modules.ConsensusChange)
  • func (hdb *HostDB) RandomHosts(n int, blacklist, addressBlacklist []types.SiaPublicKey) ([]modules.HostDBEntry, error)
  • func (hdb *HostDB) RandomHostsWithAllowance(n int, blacklist, addressBlacklist []types.SiaPublicKey, ...) ([]modules.HostDBEntry, error)
  • func (hdb *HostDB) ScoreBreakdown(entry modules.HostDBEntry) modules.HostScoreBreakdown
  • func (hdb *HostDB) SetAllowance(allowance modules.Allowance) error

Variables

var (
	// ErrInitialScanIncomplete is returned whenever an operation is not
	// allowed to be executed before the initial host scan has finished.
	ErrInitialScanIncomplete = errors.New("initial hostdb scan is not yet completed")
)

Types

type HostDB

type HostDB struct {
	// contains filtered or unexported fields
}

The HostDB is a database of potential hosts. It assigns a weight to each host based on their hosting parameters, and then can select hosts at random for uploading files.

func New

func New(g modules.Gateway, cs modules.ConsensusSet, persistDir string) (*HostDB, error)

New returns a new HostDB.

func NewCustomHostDB

func NewCustomHostDB(g modules.Gateway, cs modules.ConsensusSet, persistDir string, deps modules.Dependencies) (*HostDB, error)

NewCustomHostDB creates a HostDB using the provided dependencies. It loads the old persistence data, spawns the HostDB's scanning threads, and subscribes it to the consensusSet.

func (*HostDB) ActiveHosts

func (hdb *HostDB) ActiveHosts() (activeHosts []modules.HostDBEntry)

ActiveHosts returns a list of hosts that are currently online, sorted by weight.

func (*HostDB) AllHosts

func (hdb *HostDB) AllHosts() (allHosts []modules.HostDBEntry)

AllHosts returns all of the hosts known to the hostdb, including the inactive ones.

func (*HostDB) AverageContractPrice

func (hdb *HostDB) AverageContractPrice() (totalPrice types.Currency)

AverageContractPrice returns the average price of a host.

func (*HostDB) CheckForIPViolations

func (hdb *HostDB) CheckForIPViolations(hosts []types.SiaPublicKey) []types.SiaPublicKey

CheckForIPViolations accepts a number of host public keys and returns the ones that violate the rules of the addressFilter.

func (*HostDB) Close

func (hdb *HostDB) Close() error

Close closes the hostdb, terminating its scanning threads

func (*HostDB) EstimateHostScore

func (hdb *HostDB) EstimateHostScore(entry modules.HostDBEntry, allowance modules.Allowance) modules.HostScoreBreakdown

EstimateHostScore takes a HostExternalSettings and returns the estimated score of that host in the hostdb, assuming no penalties for age or uptime.

func (*HostDB) Host

func (hdb *HostDB) Host(spk types.SiaPublicKey) (modules.HostDBEntry, bool)

Host returns the HostSettings associated with the specified NetAddress. If no matching host is found, Host returns false.

func (*HostDB) IncrementFailedInteractions

func (hdb *HostDB) IncrementFailedInteractions(key types.SiaPublicKey)

IncrementFailedInteractions increments the number of failed interactions with a host for a given key

func (*HostDB) IncrementSuccessfulInteractions

func (hdb *HostDB) IncrementSuccessfulInteractions(key types.SiaPublicKey)

IncrementSuccessfulInteractions increments the number of successful interactions with a host for a given key

func (*HostDB) InitialScanComplete

func (hdb *HostDB) InitialScanComplete() (complete bool, err error)

InitialScanComplete returns a boolean indicating if the initial scan of the hostdb is completed.

func (*HostDB) ProcessConsensusChange

func (hdb *HostDB) ProcessConsensusChange(cc modules.ConsensusChange)

ProcessConsensusChange will be called by the consensus set every time there is a change in the blockchain. Updates will always be called in order.

func (*HostDB) RandomHosts

func (hdb *HostDB) RandomHosts(n int, blacklist, addressBlacklist []types.SiaPublicKey) ([]modules.HostDBEntry, error)

RandomHosts implements the HostDB interface's RandomHosts() method. It takes a number of hosts to return, and a slice of netaddresses to ignore, and returns a slice of entries.

func (*HostDB) RandomHostsWithAllowance

func (hdb *HostDB) RandomHostsWithAllowance(n int, blacklist, addressBlacklist []types.SiaPublicKey, allowance modules.Allowance) ([]modules.HostDBEntry, error)

RandomHostsWithAllowance works as RandomHosts but uses a temporary hosttree created from the specified allowance. This is a very expensive call and should be used with caution.

func (*HostDB) ScoreBreakdown

func (hdb *HostDB) ScoreBreakdown(entry modules.HostDBEntry) modules.HostScoreBreakdown

ScoreBreakdown provdes a detailed set of scalars and bools indicating elements of the host's overall score.

func (*HostDB) SetAllowance

func (hdb *HostDB) SetAllowance(allowance modules.Allowance) error

SetAllowance updates the allowance used by the hostdb for weighing hosts by updating the host weight function. It will completely rebuild the hosttree so it should be used with care.