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.
In the effort to release a production-ready version of Swarm, the Swarm dev team has migrated their effort to build the new Bee client, a brand-new implementation of Swarm. The main reason for this switch was the availability of a more mature networking layer (libp2p) and the secondary reason being that the insight gained from developing Swarm taught us many lessons which can be implemented best from scratch. While Bee does not currently expose every feature in the original Swarm client, development is happening at lightspeed and soon, it will surpass Swarm in functionality and stability!
Please refer to Swarm webpage for more information about the state of the Bee client and to the Bee documentation for info on installing and using the new client.
The old Swarm client, contained in this repository, can still be used while the network exists, however no maintenance or upgrades are planned for it.
Please read the The sun is setting for the old Swarm network blog post for more information and also how to reach out for help with migration.
No compatibility on the network layer with the first Ethereum Swarm implementation can be provided, mainly due to the migration in underlying network protocol from devp2p to libp2p. This means that a Bee node cannot join first Swarm network and vice versa. Migrating data is possible, please get in touch for more info on how to approach this. 🐝
Please use any of the following channels for help with migration or any other questions:
The Swarm team is reachable on Mattermost. Join the Swarm Orange Lounge on Telegram. Follow us on Twitter.
- Building the source
- Running Swarm
- Documentation
- Docker
- Developers Guide
- Public Gateways
- Swarm Dapps
- Contributing
- License
It's recommended to use Go 1.14 to build Swarm.
To simply compile the swarm
binary without a GOPATH
:
$ git clone https://github.com/ethersphere/swarm
$ cd swarm
$ make swarm
You will find the binary under ./build/bin/swarm
.
To build a vendored swarm
using go get
you must have GOPATH
set. Then run:
$ go get -d github.com/ethersphere/swarm
$ go install github.com/ethersphere/swarm/cmd/swarm
$ swarm
If you don't have an account yet, then you will be prompted to create one and secure it with a password:
Your new account is locked with a password. Please give a password. Do not forget this password.
Passphrase:
Repeat passphrase:
If you have multiple accounts created, then you'll have to choose one of the accounts by using the --bzzaccount
flag.
$ swarm --bzzaccount <your-account-here>
# example
$ swarm --bzzaccount 2f1cd699b0bf461dcfbf0098ad8f5587b038f0f1
When running, Swarm is accessible through an HTTP API on port 8500.
Confirm that it is up and running by pointing your browser to http://localhost:8500
The Ethereum Name Service is the Ethereum equivalent of DNS in the classic web. In order to use ENS to resolve names to Swarm content hashes (e.g. bzz://theswarm.eth
), swarm
has to connect to a geth
instance, which is synced with the Ethereum mainnet. This is done using the --ens-api
flag.
$ swarm --bzzaccount <your-account-here> \
--ens-api '$HOME/.ethereum/geth.ipc'
# in our example
$ swarm --bzzaccount 2f1cd699b0bf461dcfbf0098ad8f5587b038f0f1 \
--ens-api '$HOME/.ethereum/geth.ipc'
For more information on usage, features or command line flags, please consult the Documentation.
Swarm documentation can be found at https://swarm-guide.readthedocs.io.
Swarm container images are available at Docker Hub: ethersphere/swarm
latest
- latest stable releaseedge
- latest build frommaster
v0.x.y
- specific stable release
All Swarm command line arguments are supported and can be sent as part of the CMD field to the Docker container.
Examples:
Running a Swarm container from the command line
$ docker run -it ethersphere/swarm \
--debug \
--verbosity 4
Running a Swarm container with custom ENS endpoint
$ docker run -it ethersphere/swarm \
--ens-api http://1.2.3.4:8545 \
--debug \
--verbosity 4
Running a Swarm container with metrics enabled
$ docker run -it ethersphere/swarm \
--debug \
--metrics \
--metrics.influxdb.export \
--metrics.influxdb.endpoint "http://localhost:8086" \
--metrics.influxdb.username "user" \
--metrics.influxdb.password "pass" \
--metrics.influxdb.database "metrics" \
--metrics.influxdb.host.tag "localhost" \
--verbosity 4
Running a Swarm container with tracing and pprof server enabled
$ docker run -it ethersphere/swarm \
--debug \
--tracing \
--tracing.endpoint 127.0.0.1:6831 \
--tracing.svc myswarm \
--pprof \
--pprofaddr 0.0.0.0 \
--pprofport 6060
Running a Swarm container with a custom data directory mounted from a volume and a password file to unlock the swarm account
$ docker run -it -v $PWD/hostdata:/data \
-v $PWD/password:/password \
ethersphere/swarm \
--datadir /data \
--password /password \
--debug \
--verbosity 4
We assume that you have Go v1.11 installed, and GOPATH
is set.
You must have your working copy under $GOPATH/src/github.com/ethersphere/swarm
.
Most likely you will be working from your fork of swarm
, let's say from github.com/nirname/swarm
. Clone or move your fork into the right place:
$ git clone git@github.com:nirname/swarm.git $GOPATH/src/github.com/ethersphere/swarm
Vendoring is done by Makefile rule make vendor
which uses go mod vendor
and additionally copies cgo dependencies into vendor
directory from go modules cache.
If you want to add a new dependency, run go get <import-path>
, vendor it make vendor
, then commit the result.
If you want to update all dependencies to their latest upstream version, run go get -u all
and vendor them with make vendor
.
By default, go
tool will use dependencies defined in go.mod
file from modules cache. In order to import code from vendor
directory, an additional flag -mod=vendor
must be provided when calling go run
, go test
, go build
and go install
. If vendor
directory is in sync with go.mod
file by updating it with make vendor
, there should be no difference to use the flag or not. All Swarm build tools are using code only from the vendor
directory and it is encouraged to do the same in the development process, as well.
This section explains how to run unit, integration, and end-to-end tests in your development sandbox.
Testing one library:
$ go test -v -cpu 4 ./api
Note: Using options -cpu (number of cores allowed) and -v (logging even if no error) is recommended.
Testing only some methods:
$ go test -v -cpu 4 ./api -run TestMethod
Note: here all tests with prefix TestMethod will be run, so if you got TestMethod, TestMethod1, then both!
Running benchmarks:
$ go test -v -cpu 4 -bench . -run BenchmarkJoin
This section explains how to add Go pprof
profiler to Swarm
If swarm
is started with the --pprof
option, a debugging HTTP server is made available on port 6060.
You can bring up http://localhost:6060/debug/pprof to see the heap, running routines etc.
By clicking full goroutine stack dump (clicking http://localhost:6060/debug/pprof/goroutine?debug=2) you can generate trace that is useful for debugging.
This section explains how to visualize and use existing Swarm metrics and how to instrument Swarm with a new metric.
Swarm metrics system is based on the go-metrics
library.
The most common types of measurements we use in Swarm are counters
and resetting timers
. Consult the go-metrics
documentation for full reference of available types.
// incrementing a counter
metrics.GetOrRegisterCounter("network/stream/received_chunks", nil).Inc(1)
// measuring latency with a resetting timer
start := time.Now()
t := metrics.GetOrRegisterResettingTimer("http/request/GET/time"), nil)
...
t := UpdateSince(start)
Swarm supports an InfluxDB exporter. Consult the help section to learn about the command line arguments used to configure it:
$ swarm --help | grep metrics
We use Grafana and InfluxDB to visualise metrics reported by Swarm. We keep our Grafana dashboards under version control at https://github.com/ethersphere/grafana-dashboards. You could use them or design your own.
We have built a tool to help with automatic start of Grafana and InfluxDB and provisioning of dashboards at https://github.com/nonsense/stateth, which requires that you have Docker installed.
Once you have stateth
installed, and you have Docker running locally, you have to:
- Run
stateth
and keep it running in the background
$ stateth --rm --grafana-dashboards-folder $GOPATH/src/github.com/ethersphere/grafana-dashboards --influxdb-database metrics
- Run
swarm
with at least the following params:
--metrics \
--metrics.influxdb.export \
--metrics.influxdb.endpoint "http://localhost:8086" \
--metrics.influxdb.username "admin" \
--metrics.influxdb.password "admin" \
--metrics.influxdb.database "metrics"
- Open Grafana at http://localhost:3000 and view the dashboards to gain insight into Swarm.
Swarm offers a local HTTP proxy API that Dapps can use to interact with Swarm. The Ethereum Foundation is hosting a public gateway, which allows free access so that people can try Swarm without running their own node.
The Swarm public gateways are temporary and users should not rely on their existence for production services.
The Swarm public gateway can be found at https://swarm-gateways.net and is always running the latest stable
Swarm release.
You can find a few reference Swarm decentralised applications at: https://swarm-gateways.net/bzz:/swarmapps.eth
Their source code can be found at: https://github.com/ethersphere/swarm-dapps
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. "fuse: ignore default manifest entry"
The swarm 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 swarm 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.