nuts-node

Distributed registry for storing and querying health care providers their vendors and technical endpoints.

Requirements

Go >= 1.17 is required.

Building

Just use go build.

Running tests

Tests can be run by executing

go test ./...

Code Generation

Code generation is used for generating mocks, OpenAPI client- and servers, and gRPC services. Make sure that GOPATH/bin is available on PATH and that the dependencies are installed

Install protoc:

MacOS: brew install protobuf

Linux: apt install -y protobuf-compiler

Install Go tools:

make install-tools

Generating code:

To regenerate all code run the run-generators target from the makefile or use one of the following for a specific group

Group	Command
Mocks	make gen-mocks
OpenApi	make gen-api
Protobuf + gRCP	make gen-protobuf
All	make run-generators

Docs Generation

To generate the documentation, you'll need python3, sphinx and a bunch of other stuff. After you have installed python3 (and pip3 if this not already installed) run

pip3 install -r docs/requirements.txt

README

The readme is auto-generated from a template and uses the documentation to fill in the blanks.

make gen-readme

Documentation

The documentation can be build by running the following command from the /docs directory:

make html

Configuration

The Nuts node can be configured using a YAML configuration file, environment variables and commandline params.

The parameters follow the following convention: $ nuts --parameter X is equal to $ NUTS_PARAMETER=X nuts is equal to parameter: X in a yaml file.

Or for this piece of yaml

nested:
    parameter: X

is equal to $ nuts --nested.parameter X is equal to $ NUTS_NESTED_PARAMETER=X nuts

Config parameters for engines are prepended by the engine.ConfigKey by default (configurable):

engine:
    nested:
        parameter: X

is equal to $ nuts --engine.nested.parameter X is equal to $ NUTS_ENGINE_NESTED_PARAMETER=X nuts

While most options are a single value, some are represented as a list (indicated with the square brackets in the table below). To provide multiple values through flags or environment variables you can separate them with a comma (,).

Ordering

Command line parameters have the highest priority, then environment variables, then parameters from the configfile and lastly defaults. The location of the configfile is determined by the environment variable NUTS_CONFIGFILE or the commandline parameter --configfile. If both are missing the default location ./nuts.yaml is used.

Server options

The following options can be configured on the server:

Key	Default	Description
configfile	nuts.yaml	Nuts config file
datadir	./data	Directory where the node stores its files.
loggerformat	text	Log format (text, json)
strictmode	false	When set, insecure settings are forbidden.
verbosity	info	Log level (trace, debug, info, warn, error)
http.default.address	:1323	Address and port the server will be listening to
http.default.cors.origin	[]	When set, enables CORS from the specified origins for the on default HTTP interface.
Auth
auth.clockskew	5000	Allowed JWT Clock skew in milliseconds
auth.contractvalidators	[irma,uzi,dummy]	sets the different contract validators to use
auth.http.timeout	30	HTTP timeout (in seconds) used by the Auth API HTTP client
auth.irma.autoupdateschemas	true	set if you want automatically update the IRMA schemas every 60 minutes.
auth.irma.schememanager	pbdf	IRMA schemeManager to use for attributes. Can be either 'pbdf' or 'irma-demo'.
auth.publicurl		public URL which can be reached by a users IRMA client, this should include the scheme and domain: https://example.com. Additional paths should only be added if some sort of url-rewriting is done in a reverse-proxy.
Crypto
crypto.storage	fs	Storage to use, 'fs' for file system, vaultkv for Vault KV store, default: fs.
crypto.vault.address		The Vault address. If set it overwrites the VAULT_ADDR env var.
crypto.vault.pathprefix	kv	The Vault path prefix. default: kv.
crypto.vault.token		The Vault token. If set it overwrites the VAULT_TOKEN env var.
Event manager
events.nats.hostname	localhost	Hostname for the NATS server
events.nats.port	4222	Port where the NATS server listens on
events.nats.storagedir		Directory where file-backed streams are stored in the NATS server
events.nats.timeout	30	Timeout for NATS server operations
Network
network.bootstrapnodes	[]	List of bootstrap nodes (<host>:<port>) which the node initially connect to.
network.certfile		PEM file containing the server certificate for the gRPC server. Required when enableTLS is true.
network.certkeyfile		PEM file containing the private key of the server certificate. Required when network.enabletls is true.
network.disablenodeauthentication	false	Disable node DID authentication using client certificate, causing all node DIDs to be accepted. Unsafe option, only intended for workshops/demo purposes. Not allowed in strict-mode.
network.enablediscovery	true	Whether to enable automatic connecting to other nodes.
network.enabletls	true	Whether to enable TLS for incoming and outgoing gRPC connections. When certfile or certkeyfile is specified it defaults to true, otherwise false.
network.grpcaddr	:5555	Local address for gRPC to listen on. If empty the gRPC server won't be started and other nodes will not be able to connect to this node (outbound connections can still be made).
network.nodedid		Specifies the DID of the organization that operates this node, typically a vendor for EPD software. It is used to identify the node on the network. If the DID document does not exist of is deactivated, the node will not start.
network.truststorefile		PEM file containing the trusted CA certificates for authenticating remote gRPC servers.
network.v1.advertdiagnosticsinterval	5000	Interval (in milliseconds) that specifies how often the node should broadcast its diagnostic information to other nodes (specify 0 to disable).
network.v1.adverthashesinterval	2000	Interval (in milliseconds) that specifies how often the node should broadcast its last hashes to other nodes.
network.v1.collectmissingpayloadsinterval	60000	Interval (in milliseconds) that specifies how often the node should check for missing payloads and broadcast its peers for it (specify 0 to disable). This check might be heavy on larger DAGs so make sure not to run it too often.
network.v2.gossipinterval	5000	Interval (in milliseconds) that specifies how often the node should gossip its new hashes to other nodes.
VCR
vcr.overrideissueallpublic	true	Overrides the "Public" property of a credential when issuing credentials: if set to true, all issued credentials are published as public credentials, regardless of whether they're actually marked as public.

This table is automatically generated using the configuration flags in the core and engines. When they're changed the options table must be regenerated using the Makefile:

$ make update-docs

CLI options

The following options can be supplied when running CLI commands:

Key	Default	Description
address	localhost:1323	Address of the remote node. Must contain at least host and port, URL scheme may be omitted. In that case it 'http://' is prepended.
timeout	10s	Client time-out when performing remote operations, such as '500ms' or '10s'. Refer to Golang's 'time.Duration' syntax for a more elaborate description of the syntax.