LogicNG as a Service

A web service based on LogicNG.

It exposes over 50 LogicNG functions as REST Web Services, among them

• SAT Solver
• MaxSAT Solver
• BDD Compilation
• DNNF Compilation
• Normal Forms
• Formula Simplifications
• ...

Many of the algorithms can be parametrized via query parameters. Input/Output can be JSON or Protocol Buffer (configured via accept and Content-Type headers of the HTTP request).

Usage

Compile it yourself

Install and initialize swag (required for generating the Swagger UI)

go install github.com/swaggo/swag/cmd/swag@latest
swag init

Run the service with a simple

go run main.go

This fires up the server on port 8080 with a default computation timeout of 5 seconds. You can modify these parameters with

go run main.go -host "hostname" -port 9090 -timeout "20s"

to start the server on host "hostname", port 9090, and a timeout of 20 seconds.

Use the binary

You can just download a binary under releases and you should be ready to go.

Docker

... or just use docker

docker run -p 8080:8080 ghcr.io/booleworks/logicng-service:0.0.2

Swagger

A swagger documentation of all endpoints is available at $host:$port/swagger and should illustrate all available algorithms and configuration parameters.

Functions

Method	Endpoint	Input	Output	Query Params
POST	assignment/evaluation	AssignmentInput	BoolResult	-
POST	assignment/restriction	AssignmentInput	FormulaResult	-
POST	bdd/compilation	FormulaInput	GraphResult	Variable Ordering
POST	bdd/graphical	FormulaInput	String	Variable Ordering, Graph Format
POST	dnnf/compilation	FormulaInput	FormulaResult	-
POST	encoding/cc	FormulaInput	FormulaResult	Encoding Algorithm
POST	encoding/pbc	FormulaInput	FormulaResult	Encoding Algorithm
POST	explanation/mus	FormulaInput	FormulaResult	MUS Algorithm
POST	explanation/smus	FormulaInput	FormulaResult	-
POST	formula/atoms	FormulaInput	IntResult	-
POST	formula/depth	FormulaInput	IntResult	-
POST	formula/graphical	FormulaInput	String	Graph Type, Graph Format
POST	formula/lit-profile	FormulaInput	ProfileResult	-
POST	formula/literals	FormulaInput	StringSetResult	-
POST	formula/nodes	FormulaInput	IntResult	-
POST	formula/sub-formulas	FormulaInput	FormulaResult	-
POST	formula/var-profile	FormulaInput	ProfileResult	-
POST	formula/variables	FormulaInput	StringSetResult	-
POST	graph/components	FormulaInput	ComponentResult	-
POST	graph/constraint	FormulaInput	GraphResult	-
POST	graph/constraint/graphical	FormulaInput	String	Graph Format
POST	model/counting	FormulaInput	StringResult	Counting Algorithm
POST	model/counting/projection	FormulaVarsInput	StringResult	Counting Algorithm
POST	model/enumeration	FormulaInput	FormulaResult	Enumeration Algorithm
POST	model/enumeration/projection	FormulaVarsInput	FormulaResult	Enumeration Algorithm
POST	normalform/predicate/nnf	FormulaInput	BoolResult	-
POST	normalform/predicate/cnf	FormulaInput	BoolResult	-
POST	normalform/predicate/dnf	FormulaInput	BoolResult	-
POST	normalform/predicate/aig	FormulaInput	BoolResult	-
POST	normalform/predicate/minterm	FormulaInput	BoolResult	-
POST	normalform/predicate/maxterm	FormulaInput	BoolResult	-
POST	normalform/transformation/aig	FormulaInput	FormulaResult	-
POST	normalform/transformation/cnf	FormulaInput	FormulaResult	CNF Algorithm
POST	normalform/transformation/dnf	FormulaInput	FormulaResult	DNF Algorithm
POST	normalform/transformation/nnf	FormulaInput	FormulaResult	-
POST	prime/minimal-cover	FormulaInput	FormulaResult	Min or Max Models
POST	prime/minimal-implicant	FormulaInput	FormulaResult	-
GET	randomizer	-	FormulaResult	Seed, Depth, Vars, Formulas
POST	simplification/advanced	FormulaInput	FormulaResult	Backbone, Factor Out, Negation Flags
POST	simplification/backbone	FormulaInput	FormulaResult	-
POST	simplification/distribution	FormulaInput	FormulaResult	-
POST	simplification/factorout	FormulaInput	FormulaResult	-
POST	simplification/negation	FormulaInput	FormulaResult	-
POST	simplification/qmc	FormulaInput	FormulaResult	-
POST	simplification/subsumption	FormulaInput	FormulaResult	-
POST	simplification/unitpropagation	FormulaInput	FormulaResult	-
POST	solver/backbone	FormulaInput	BackboneResult	-
POST	solver/maxsat	MaxSatInput	MaxSatResult	MaxSAT Algorithm
POST	solver/predicate/contradiction	FormulaInput	BoolResult	-
POST	solver/predicate/equivalence	FormulaInput	BoolResult	-
POST	solver/predicate/implication	FormulaInput	BoolResult	-
POST	solver/predicate/tautology	FormulaInput	BoolResult	-
POST	solver/sat	FormulaInput	SatResult	UNSAT Core Flag
POST	substitution/anonymization	FormulaInput	FormulaResult	Variable Prefix
POST	substitution/variables	SubstitutionInput	FormulaResult	-

Chaining

The API is designed in a way, that the output of many of the endpoints can be used as input to many other endpoints. So e.g. you can simply pass a set of formulas, substitute some variables, anonymize the formula, compute a normal form, and generate a Mermaid.js visualization of the resulting formula without ever manipulating the input/output. In the table above this means that you always can use a FormulaResult from one endpoint directly as FormulaInput for another endpoint.

Disclaimer

This is a funny little side project for playing around with Go Web Services (Standard Library only, no frameworks).
It is by no means a production-ready piece of software with bells and whistles. But if you just need some logical computations and don't want to integrate LogicNG in Go/Rust/Java in you project - perhaps it's for you :)