OpenFGA Language

ANTLR Grammar for the OpenFGA DSL and parser from and to the OpenFGA JSON Syntax

Table of Contents

• About OpenFGA
• Resources
• Installation
• Usage
• CLI
• Community Parsers
• Contributing
• License

About

OpenFGA is an open source Fine-Grained Authorization solution inspired by Google's Zanzibar paper. It was created by the FGA team at Auth0 based on Auth0 Fine-Grained Authorization (FGA), available under a permissive license (Apache-2) and welcomes community contributions.

OpenFGA is designed to make it easy for application builders to model their permission layer, and to add and integrate fine-grained authorization into their applications. OpenFGA’s design is optimized for reliability and low latency at a high scale.

Resources

• OpenFGA Documentation
• OpenFGA API Documentation
• Twitter
• OpenFGA Community
• Zanzibar Academy
• Google's Zanzibar Paper (2019)

About This Repo

This repo contains everything needed to interact with the OpenFGA Authorization Models schema versions 1.1+, in multiple languages (currently, Go and JS are supported).

Feature	Implemented in ANTLR
Basic DSL	✅
Nesting	✅ (partial, see #113)
Conditions	✅

Feature	Go	JS	Java
Transformer from the DSL to JSON and from JSON to DSL	✅	✅	✅
Syntactic Model Validations	✅	✅	✅
Semantic Model Validations	❌ (planned, see #99)	✅	✅
Graphing & Utility Methods	❌ (planned)	❌ (planned)	❌ (planned)

Installation

Go

go get github.com/openfga/language/pkg/go

Node

npm install @openfga/syntax-transformer@beta

Usage

Transformer

Go

import "github.com/openfga/language/pkg/go/transformer"

dslString := `model
  schema 1.1
type user
type folder
  relations
    define viewer: [user]`

// Transform from DSL to a JSON string
generatedJsonString, err := transformer.TransformDSLToJSONString(dslString)

// Transform from a JSON string to DSL
generatedDsl, err := transformer.TransformJSONStringToDSL(generatedJsonString)

Node

import { transformer } from "@openfga/syntax-transformer"

let dslString = `model
  schema 1.1
type user
type folder
  relations
    define viewer: [user]`;

// Transform from DSL to a JSON string
const generatedJsonString = transformer.transformDSLToJSONString(dslString)

// Transform from a JSON string to DSL
const generatedDsl = transformer.transformJSONStringToDSL(generatedJsonString)

Java

import dev.openfga.language.DslToJsonTransformer;
import dev.openfga.language.JsonToDslTransformer;

var dslString = """model
  schema 1.1
type user
type folder
  relations
    define viewer: [user]""";

// Transform from DSL to a JSON string
var generatedJsonString = new DslToJsonTransformer().transform(dslString);

// Transform from a JSON string to DSL
var generatedDsl = new JsonToDslTransformer().transform(generatedJsonString);

CLI

Use the FGA CLI

Community Parsers

Repo	License	Maintainers	Language	Schema v1.0	Schema v1.1	Package Managers	Other Links
openfga language (syntax-transformer)	Apache-2.0	@openfga	ANTLR (Go and Typescript implementations)	<0.1.5	Yes (v0.0.8+)	-
openfga-dsl-parser	Apache-2.0	@maxmindlin - @dblclik	Rust	Yes	No		WASM - Python
openfga-rs	Apache-2.0	@iammathew	Rust	Yes	No
openfga-dsl-parser	Apache-2.0	@craigpastro	ANTLR & Go	Yes	Partial (requires self). Supports nesting

Community Wrapper

Repo	License	Maintainers	Language	Schema v1.0	Schema v1.1	Package Managers	Other Links
fga cli	Apache-2.0	@openfga	Go	No	Yes
fga-transformer-cli	MIT	@ozee-io	Javascript	Yes	Yes

Contributing

See CONTRIBUTING.

Author

OpenFGA

License

This project is licensed under the Apache-2.0 license. See the LICENSE file for more info.