swarm

package
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 Go to latest Published: Aug 2, 2018 License: GPL-3.0 Imports: 34 Imported by: 0

README

Swarm

https://swarm.ethereum.org

Swarm is a distributed storage platform and content distribution service, a native base layer service of the ethereum web3 stack. The primary objective of Swarm is to provide a decentralized and redundant store for dapp code and data as well as block chain and state data. Swarm is also set out to provide various base layer services for web3, including node-to-node messaging, media streaming, decentralised database services and scalable state-channel infrastructure for decentralised service economies.

Travis Gitter

Building the source

Building Swarm requires Go (version 1.10 or later).

go get -d github.com/ethereum/go-ethereum

go install github.com/ethereum/go-ethereum/cmd/swarm

Documentation

Swarm documentation can be found at https://swarm-guide.readthedocs.io.

Contribution

Thank you for considering to help out with the source code! We welcome contributions from anyone on the internet, and are grateful for even the smallest of fixes!

If you'd like to contribute to Swarm, please fork, fix, commit and send a pull request for the maintainers to review and merge into the main code base. If you wish to submit more complex changes though, please check up with the core devs first on our Swarm gitter channel to ensure those changes are in line with the general philosophy of the project and/or get some early feedback which can make both your efforts much lighter as well as our review and merge procedures quick and simple.

Please make sure your contributions adhere to our coding guidelines:

  • Code must adhere to the official Go formatting guidelines (i.e. uses gofmt).
  • Code must be documented adhering to the official Go commentary guidelines.
  • Pull requests need to be based on and opened against the master branch.
  • Code review guidelines.
  • Commit messages should be prefixed with the package(s) they modify.
    • E.g. "swarm/fuse: ignore default manifest entry"

License

The go-ethereum library (i.e. all code outside of the cmd directory) is licensed under the GNU Lesser General Public License v3.0, also included in our repository in the COPYING.LESSER file.

The go-ethereum binaries (i.e. all code inside of the cmd directory) is licensed under the GNU General Public License v3.0, also included in our repository in the COPYING file.

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Info 

type Info struct {
	*api.Config
	*chequebook.Params
}

serialisable info about swarm

func (*Info) Info 

func (self *Info) Info() *Info

type Swarm 

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

the swarm stack

func NewSwarm 

func NewSwarm(config *api.Config, mockStore *mock.NodeStore) (self *Swarm, err error)

creates a new swarm service instance implements node.Service If mockStore is not nil, it will be used as the storage for chunk data. MockStore should be used only for testing.

func (*Swarm) API 

func (self *Swarm) API() *SwarmAPI

func (*Swarm) APIs 

func (self *Swarm) APIs() []rpc.API

implements node.Service APIs returns the RPC API descriptors the Swarm implementation offers

func (*Swarm) Api 

func (self *Swarm) Api() *api.API

func (*Swarm) Protocols 

func (self *Swarm) Protocols() (protos []p2p.Protocol)

implements the node.Service interface

func (*Swarm) RegisterPssProtocol 

func (self *Swarm) RegisterPssProtocol(spec *protocols.Spec, targetprotocol *p2p.Protocol, options *pss.ProtocolParams) (*pss.Protocol, error)

func (*Swarm) SetChequebook 

func (self *Swarm) SetChequebook(ctx context.Context) error

SetChequebook ensures that the local checquebook is set up on chain.

func (*Swarm) Start 

func (self *Swarm) Start(srv *p2p.Server) error

Start is called when the stack is started * starts the network kademlia hive peer management * (starts netStore level 0 api) * starts DPA level 1 api (chunking -> store/retrieve requests) * (starts level 2 api) * starts http proxy server * registers url scheme handlers for bzz, etc * TODO: start subservices like sword, swear, swarmdns

implements the node.Service interface

func (*Swarm) Stop 

func (self *Swarm) Stop() error

implements the node.Service interface stops all component services.

type SwarmAPI 

type SwarmAPI struct {
	Api     *api.API
	Backend chequebook.Backend
	PrvKey  *ecdsa.PrivateKey
}

type Voidstore 

type Voidstore struct {
}

func (Voidstore) Load 

func (self Voidstore) Load(string) ([]byte, error)

func (Voidstore) Save 

func (self Voidstore) Save(string, []byte) error

Source Files

View all Source files

Directories

Path Synopsis
api
client
http
Show nicely (but simple) formatted HTML error pages (or respond with JSON if the appropriate `Accept` header is set)) for the http package.
 Show nicely (but simple) formatted HTML error pages (or respond with JSON if the appropriate `Accept` header is set)) for the http package.
Package bmt provides a binary merkle tree implementation used for swarm chunk hash Package bmt is a simple nonconcurrent reference implementation for hashsize segment based Binary Merkle tree hash on arbitrary but fixed maximum chunksize This implementation does not take advantage of any paralellisms and uses far more memory than necessary, but it is easy to see that it is correct.
 Package bmt provides a binary merkle tree implementation used for swarm chunk hash Package bmt is a simple nonconcurrent reference implementation for hashsize segment based Binary Merkle tree hash on arbitrary but fixed maximum chunksize This implementation does not take advantage of any paralellisms and uses far more memory than necessary, but it is easy to see that it is correct.
bitvector
priorityqueue
simulation
simulations
You can run this simulation using go run ./swarm/network/simulations/overlay.go
 You can run this simulation using go run ./swarm/network/simulations/overlay.go
simulations/discovery
stream
stream/intervals
Package pot see doc.go Package pot (proximity order tree) implements a container similar to a binary tree.
 Package pot see doc.go Package pot (proximity order tree) implements a container similar to a binary tree.
pss
Pss provides devp2p functionality for swarm nodes without the need for a direct tcp connection between them.
 Pss provides devp2p functionality for swarm nodes without the need for a direct tcp connection between them.
client
simple abstraction for implementing pss functionality the pss client library aims to simplify usage of the p2p.protocols package over pss IO is performed using the ordinary p2p.MsgReadWriter interface, which transparently communicates with a pss node via RPC using websockets as transport layer, using methods in the PssAPI class in the swarm/pss package Minimal-ish usage example (requires a running pss node with websocket RPC): import ( "context" "fmt" "os" pss "github.com/ethereum/go-ethereum/swarm/pss/client" "github.com/ethereum/go-ethereum/p2p/protocols" "github.com/ethereum/go-ethereum/p2p" "github.com/ethereum/go-ethereum/swarm/pot" "github.com/ethereum/go-ethereum/swarm/log" ) type FooMsg struct { Bar int } func fooHandler (msg interface{}) error { foomsg, ok := msg.(*FooMsg) if ok { log.Debug("Yay, just got a message", "msg", foomsg) } return errors.New(fmt.Sprintf("Unknown message")) } spec := &protocols.Spec{ Name: "foo", Version: 1, MaxMsgSize: 1024, Messages: []interface{}{ FooMsg{}, }, } proto := &p2p.Protocol{ Name: spec.Name, Version: spec.Version, Length: uint64(len(spec.Messages)), Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error { pp := protocols.NewPeer(p, rw, spec) return pp.Run(fooHandler) }, } func implementation() { cfg := pss.NewClientConfig() psc := pss.NewClient(context.Background(), nil, cfg) err := psc.Start() if err != nil { log.Crit("can't start pss client") os.Exit(1) } log.Debug("connected to pss node", "bzz addr", psc.BaseAddr) err = psc.RunProtocol(proto) if err != nil { log.Crit("can't start protocol on pss websocket") os.Exit(1) } addr := pot.RandomAddress() // should be a real address, of course psc.AddPssPeer(addr, spec) // use the protocol for something psc.Stop() } BUG(test): TestIncoming test times out due to deadlock issues in the swarm hive
 simple abstraction for implementing pss functionality the pss client library aims to simplify usage of the p2p.protocols package over pss IO is performed using the ordinary p2p.MsgReadWriter interface, which transparently communicates with a pss node via RPC using websockets as transport layer, using methods in the PssAPI class in the swarm/pss package Minimal-ish usage example (requires a running pss node with websocket RPC): import ( "context" "fmt" "os" pss "github.com/ethereum/go-ethereum/swarm/pss/client" "github.com/ethereum/go-ethereum/p2p/protocols" "github.com/ethereum/go-ethereum/p2p" "github.com/ethereum/go-ethereum/swarm/pot" "github.com/ethereum/go-ethereum/swarm/log" ) type FooMsg struct { Bar int } func fooHandler (msg interface{}) error { foomsg, ok := msg.(*FooMsg) if ok { log.Debug("Yay, just got a message", "msg", foomsg) } return errors.New(fmt.Sprintf("Unknown message")) } spec := &protocols.Spec{ Name: "foo", Version: 1, MaxMsgSize: 1024, Messages: []interface{}{ FooMsg{}, }, } proto := &p2p.Protocol{ Name: spec.Name, Version: spec.Version, Length: uint64(len(spec.Messages)), Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error { pp := protocols.NewPeer(p, rw, spec) return pp.Run(fooHandler) }, } func implementation() { cfg := pss.NewClientConfig() psc := pss.NewClient(context.Background(), nil, cfg) err := psc.Start() if err != nil { log.Crit("can't start pss client") os.Exit(1) } log.Debug("connected to pss node", "bzz addr", psc.BaseAddr) err = psc.RunProtocol(proto) if err != nil { log.Crit("can't start protocol on pss websocket") os.Exit(1) } addr := pot.RandomAddress() // should be a real address, of course psc.AddPssPeer(addr, spec) // use the protocol for something psc.Stop() } BUG(test): TestIncoming test times out due to deadlock issues in the swarm hive
notify
services
swap
swap/swap
encryption
mock
Package mock defines types that are used by different implementations of mock storages.
 Package mock defines types that are used by different implementations of mock storages.
mock/db
Package db implements a mock store that keeps all chunk data in LevelDB database.
 Package db implements a mock store that keeps all chunk data in LevelDB database.
mock/mem
Package mem implements a mock store that keeps all chunk data in memory.
 Package mem implements a mock store that keeps all chunk data in memory.
mock/rpc
Package rpc implements an RPC client that connect to a centralized mock store.
 Package rpc implements an RPC client that connect to a centralized mock store.
mock/test
Package test provides functions that are used for testing GlobalStorer implementations.
 Package test provides functions that are used for testing GlobalStorer implementations.
mru
Package mru defines Mutable resource updates.
 Package mru defines Mutable resource updates.

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