core

Documentation

Overview

Package core implements the IpfsNode object and related methods.

Packages underneath core/ provide a (relatively) stable, low-level API to carry out most IPFS-related tasks. For more details on the other interfaces and how core/... fits into the bigger IPFS picture, see:

$ godoc github.com/ipfs/go-ipfs

Index

• Constants
• Variables
• func Bootstrap(n *IpfsNode, cfg BootstrapConfig) (io.Closer, error)
• func Resolve(ctx context.Context, n *IpfsNode, p path.Path) (*merkledag.Node, error)
• func ResolveToKey(ctx context.Context, n *IpfsNode, p path.Path) (key.Key, error)
• type BootstrapConfig
  • func BootstrapConfigWithPeers(pis []peer.PeerInfo) BootstrapConfig
• type BuildCfg
• type DiscoveryOption
• type HostOption
• type IpfsNode
  • func NewNode(ctx context.Context, cfg *BuildCfg) (*IpfsNode, error)
  • func (n *IpfsNode) Bootstrap(cfg BootstrapConfig) error
  • func (n *IpfsNode) Close() error
  • func (n *IpfsNode) Context() context.Context
  • func (n *IpfsNode) HandlePeerFound(p peer.PeerInfo)
  • func (n *IpfsNode) LoadPrivateKey() error
  • func (n *IpfsNode) OnlineMode() bool
  • func (n *IpfsNode) Process() goprocess.Process
  • func (n *IpfsNode) SetupOfflineRouting() error
• type Mounts
• type RoutingOption

Constants

const IpnsValidatorTag = "ipns"

Variables

var DefaultBootstrapConfig = BootstrapConfig{
	MinPeerThreshold:  4,
	Period:            30 * time.Second,
	ConnectionTimeout: (30 * time.Second) / 3,
}

DefaultBootstrapConfig specifies default sane parameters for bootstrapping.

var ErrNoNamesys = errors.New(
	"core/resolve: no Namesys on IpfsNode - can't resolve ipns entry")

ErrNoNamesys is an explicit error for when an IPFS node doesn't (yet) have a name system

var ErrNotEnoughBootstrapPeers = errors.New("not enough bootstrap peers to bootstrap")

ErrNotEnoughBootstrapPeers signals that we do not have enough bootstrap peers to bootstrap correctly.

Functions

func Bootstrap

func Bootstrap(n *IpfsNode, cfg BootstrapConfig) (io.Closer, error)

Bootstrap kicks off IpfsNode bootstrapping. This function will periodically check the number of open connections and -- if there are too few -- initiate connections to well-known bootstrap peers. It also kicks off subsystem bootstrapping (i.e. routing).

func Resolve

func Resolve(ctx context.Context, n *IpfsNode, p path.Path) (*merkledag.Node, error)

Resolve resolves the given path by parsing out protocol-specific entries (e.g. /ipns/<node-key>) and then going through the /ipfs/ entries and returning the final merkledag node. Effectively enables /ipns/, /dns/, etc. in commands.

func ResolveToKey

func ResolveToKey(ctx context.Context, n *IpfsNode, p path.Path) (key.Key, error)

ResolveToKey resolves a path to a key.

It first checks if the path is already in the form of just a key (<key> or /ipfs/<key>) and returns immediately if so. Otherwise, it falls back onto Resolve to perform resolution of the dagnode being referenced.

Types

type BootstrapConfig

type BootstrapConfig struct {

	// MinPeerThreshold governs whether to bootstrap more connections. If the
	// node has less open connections than this number, it will open connections
	// to the bootstrap nodes. From there, the routing system should be able
	// to use the connections to the bootstrap nodes to connect to even more
	// peers. Routing systems like the IpfsDHT do so in their own Bootstrap
	// process, which issues random queries to find more peers.
	MinPeerThreshold int

	// Period governs the periodic interval at which the node will
	// attempt to bootstrap. The bootstrap process is not very expensive, so
	// this threshold can afford to be small (<=30s).
	Period time.Duration

	// ConnectionTimeout determines how long to wait for a bootstrap
	// connection attempt before cancelling it.
	ConnectionTimeout time.Duration

	// BootstrapPeers is a function that returns a set of bootstrap peers
	// for the bootstrap process to use. This makes it possible for clients
	// to control the peers the process uses at any moment.
	BootstrapPeers func() []peer.PeerInfo
}

BootstrapConfig specifies parameters used in an IpfsNode's network bootstrapping process.

func BootstrapConfigWithPeers

func BootstrapConfigWithPeers(pis []peer.PeerInfo) BootstrapConfig

type BuildCfg

type BuildCfg struct {
	// If online is set, the node will have networking enabled
	Online bool

	// If NilRepo is set, a repo backed by a nil datastore will be constructed
	NilRepo bool

	Routing RoutingOption
	Host    HostOption
	Repo    repo.Repo
}

type DiscoveryOption

type DiscoveryOption func(p2phost.Host) (discovery.Service, error)

type HostOption

type HostOption func(ctx context.Context, id peer.ID, ps peer.Peerstore, bwr metrics.Reporter, fs []*net.IPNet) (p2phost.Host, error)

var DefaultHostOption HostOption = constructPeerHost

type IpfsNode

type IpfsNode struct {

	// Self
	Identity peer.ID // the local node's identity

	Repo repo.Repo

	// Local node
	Pinning    pin.Pinner // the pinning manager
	Mounts     Mounts     // current mount state, if any.
	PrivateKey ic.PrivKey // the local node's private Key

	// Services
	Peerstore  peer.Peerstore       // storage for other Peer instances
	Blockstore bstore.GCBlockstore  // the block store (lower level)
	Blocks     *bserv.BlockService  // the block service, get/add blocks.
	DAG        merkledag.DAGService // the merkle dag service, get/add objects.
	Resolver   *path.Resolver       // the path resolution system
	Reporter   metrics.Reporter
	Discovery  discovery.Service
	FilesRoot  *mfs.Root

	// Online
	PeerHost     p2phost.Host        // the network host (server+client)
	Bootstrapper io.Closer           // the periodic bootstrapper
	Routing      routing.IpfsRouting // the routing system. recommend ipfs-dht
	Exchange     exchange.Interface  // the block exchange + strategy (bitswap)
	Namesys      namesys.NameSystem  // the name system, resolves paths to hashes
	Diagnostics  *diag.Diagnostics   // the diagnostics service
	Ping         *ping.PingService
	Reprovider   *rp.Reprovider // the value reprovider system
	IpnsRepub    *ipnsrp.Republisher
	// contains filtered or unexported fields
}

IpfsNode is IPFS Core module. It represents an IPFS instance.

func NewNode

func NewNode(ctx context.Context, cfg *BuildCfg) (*IpfsNode, error)

func (*IpfsNode) Bootstrap

func (n *IpfsNode) Bootstrap(cfg BootstrapConfig) error

func (*IpfsNode) Close

func (n *IpfsNode) Close() error

Close calls Close() on the Process object

func (*IpfsNode) Context

func (n *IpfsNode) Context() context.Context

Context returns the IpfsNode context

func (*IpfsNode) HandlePeerFound

func (n *IpfsNode) HandlePeerFound(p peer.PeerInfo)

func (*IpfsNode) LoadPrivateKey

func (n *IpfsNode) LoadPrivateKey() error

func (*IpfsNode) OnlineMode

func (n *IpfsNode) OnlineMode() bool

func (*IpfsNode) Process

func (n *IpfsNode) Process() goprocess.Process

Process returns the Process object

func (*IpfsNode) SetupOfflineRouting

func (n *IpfsNode) SetupOfflineRouting() error

SetupOfflineRouting loads the local nodes private key and uses it to instantiate a routing system in offline mode. This is primarily used for offline ipns modifications.

type Mounts

type Mounts struct {
	Ipfs mount.Mount
	Ipns mount.Mount
}

Mounts defines what the node's mount state is. This should perhaps be moved to the daemon or mount. It's here because it needs to be accessible across daemon requests.

type RoutingOption

type RoutingOption func(context.Context, p2phost.Host, repo.Datastore) (routing.IpfsRouting, error)

var DHTOption RoutingOption = constructDHTRouting

var NilRouterOption RoutingOption = nilrouting.ConstructNilRouting