Streamr CLI tool
The Streamr Command line (CLI) tool is for interacting with the Streamr Network. Available on NPM, @streamr/cli-tools.
npm install -g @streamr/cli-tools
16.13.x is the minimum required version. Node.js
8.x and later versions are recommended.
All commands follow pattern
streamr <command> <subcommand>, e.g.
streamr stream subscribe
streamr mock-data generate
To get a list of all commands simply run
streamr. To list subcommands run e.g.
streamr <command> <subcommand> --help to get more information about a a command, its options, and so forth.
If there is a stream parameter in a command, it can be defined as a full id (e.g.
0x1234567890123456789012345678901234567890/foo/bar) or a path (e.g.
/foo/bar). If path notation is used, the stream ID is made by prefixing the authenticated Ethereum address (
--private-key <key>) to the path.
Used to subscribe to a stream and output real-time JSON objects to stdout line-by-line.
For example, to subscribe to a public stream such as the tram demo do
streamr stream subscribe streamr.eth/demos/helsinki-trams
To subscribe to a private stream and authenticate with an Ethereum private key:
streamr stream subscribe streamId --private-key <key>
To subscribe to a particular stream partition, use the partition flag:
streamr stream subscribe streamId -p <partition_number>
Used to publish events to a stream from stdin line-by-line. Each line should be a valid JSON object.
Example of use:
streamr stream publish <streamId> --private-key <key>
Generate random JSON objects to stdout line-by-line.
Useful for generating test data to be published to a stream with
streamr mock-data generate | streamr stream publish <streamId> --private-key <key>
Query a list of streams by a search term and/or permissions. E.g.:
streamr stream search foobar --user 0x1234567890123456789012345678901234567890
A search term query searchers over the stream id field. E.g:
streamr stream search foobar
It could find these streams:
A permission query searches over stream permissions. You can either query by direct permissions (which are explicitly granted to a user), or by all permissions (including public permissions, which apply to all users).
E.g. all streams where a user has some direct permission:
streamr stream search --user 0x1234567890123456789012345678901234567890
All streams accessible by a user:
streamr stream search --user 0x1234567890123456789012345678901234567890 --public
The argument of the
--user option can be omitted. In that case, it defaults to the authenticated user (specified by
It is also possible to filter by specific permissions by using
--any. E.g. if you want to find the streams you can subscribe to:
streamr stream search --user --public --all subscribe --private-key <key>
If more than one permission is needed, specify the permissions in a comma-separated list (e.g.
--all subscribe,publish). It returns streams where all listed permissions are granted. If just any of the permissions is required, use
--any instead of
--all. Please prefer
--any when possible as it has better query performance.
Show detailed information about a specific stream
streamr stream show <streamId> --private-key <key>
Create a new stream
streamr stream create <streamId> --private-key <key>
streamr stream create /foo/bar
streamr stream create 0x1234567890123456789012345678901234567890/foobar
streamr stream create yourdomain.ens/foobar
Request a resend of historical data printed as JSON objects to stdout line-by-line.
For example, to fetch the 10 latest messages of a public stream such as the tram demo do
streamr stream resend last 10 streamr.eth/demos/helsinki-trams
To fetch data starting from a particular date-time
streamr stream resend from 2019-05-10T17:00:00 <streamId> --private-key <key>
To fetch data between two date-times
streamr stream resend range 2019-05-10T17:00:00 2019-05-11T21:00:00 <streamId> --private-key <key>
The CLI tool can be used to vote on Streamr governance proposals as an alternative to doing it manually in the voting UI. This is useful if you have tokens in a large number of wallets (for example due to staking) and you therefore prefer to cast your votes programmatically.
streamr governance vote <proposalId> <choiceId> --private-key <key>
The easiest way to find the
proposalId is to click on a proposal in the voting UI and then look at the browser URL. The URL has the form
https://vote.streamr.network/#/proposal/<proposalId>, i.e. the last part of the URL is the
proposalId. It starts with
choiceId is just a sequence number. You can again use the UI to check what the choices are. The first option from the top is
1, the next one is
2, and so on. For example:
streamr governance vote 0x2109759e060ba5a37d70be00522e00da77397f838c01c12f74c8d834ad4f4b0c 1 --private-key <key>
You must pass either the
User can specify environment and authentication details with the following command line arguments:
--private-key <key>, e.g.
--config <file>, e.g.
--devuse the pre-defined development environment
--config argument tries to read a configuration file from the current working directory (either without a file extension, or with
.json extension added). It also tries to read it from
--config argument is specified, default settings are read from
~/.streamr/config/default.json, if that file exists.
The configuration file is a JSON. It has one root-level property
Publish & subscribe piping
You can use the piping facilities of your *nix operating system with commands
subscribe to achieve some
useful operations. Below is a list of some ideas.
Subscribing to a stream from any programming language
You can pipe the line-by-line JSON objects output by
your program written in any language. Just make the program read JSON objects
streamr stream subscribe streamr.eth/demos/helsinki-trams | ruby calculate-average-speed.rb
Publishing to a stream from any programming language
If your program produces JSON objects to stdout (line-by-line), you can
redirect it to command
publish to publish the JSON objects to a stream.
python printSensorReadingsAsJson.py | streamr stream publish <streamId> --private-key <key>
You can also subscribe to a stream, apply a transformation, and then pipe the transformed output into another stream.
streamr stream subscribe <sourceStream> | ./calculateMovingAverages | streamr stream publish <destinationStream> --private-key <key>
Same rules apply here as before. Your program should accept line-by-line JSON objects via stdin and output JSON objects to stdout line-by-line.
Copying a production stream into development environment
If you have a working stream in production that you'd also like to use in your
development environment, you can combine the
publish commands to effectively copy
the real-time events.
streamr stream subscribe streamr.eth/demos/helsinki-trams | streamr stream publish --dev <streamId> --private-key <key>