Blinded Tokens Microservice

This is a fork of the Challenge Bypass Server, that implements the HTTP REST interface, persistence in Postgresql, multiple issuers, etc.

It also uses cgo bindings to a rust library to implement the cryptographic protocol.

Dependencies

Install Docker.

Run/build using docker

docker-compose up

Linting

This project uses golangci-lint for linting, this is run by CI and should be run before raising a PR.

To run locally use make lint which runs linting using docker however if you want to run it locally using a binary release (which can be faster) follow the installation instructions for your platform and then run golangci-lint run -v ./...

Testing

Run the below command in order to test changes, if you have an M1 / M2 Mac (or ARM based processor) follow the steps below to setup docker to be able to run the tests

make docker-test

Have an M1 / M2 (ARM) Mac?

1.) In Docker Desktop, go to: Settings -> Docker Engine

Modify file to include

 "runtimes": {
   "linux": {
     "path": "linux"
   }
 }

2.) Modify Docker File

Replace rust_builder with:

FROM arm64v8/rust:1.69 as rust_builder
RUN rustup target add aarch64-unknown-linux-musl
RUN apt-get update && apt-get install -y musl-tools:arm64
RUN git clone https://github.com/brave-intl/challenge-bypass-ristretto-ffi /src
WORKDIR /src
RUN git checkout 1.0.1
RUN CARGO_PROFILE_RELEASE_LTO=true cargo rustc --target=aarch64-unknown-linux-musl --release --crate-type staticlib

Replace go_builder with:

FROM arm64v8/golang:1.18 as go_builder
RUN apt-get update && apt-get install -y ca-certificates postgresql-client python3-pip
RUN pip install awscli --upgrade
RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin latest
RUN mkdir /src
WORKDIR /src
COPY . .
RUN go mod download
COPY --from=rust_builder /src/target/aarch64-unknown-linux-musl/release/libchallenge_bypass_ristretto_ffi.a /usr/lib/libchallenge_bypass_ristretto_ffi.a
ENV GOARCH=arm64
RUN go build -ldflags '-linkmode external -extldflags "-static"' -tags 'osusergo netgo static_build' -o challenge-bypass-server main.go
CMD ["/src/challenge-bypass-server"]

Deployment

For testing purposes this repo can be deployed to Heroku. The settings set in environment variables DBCONFIG and DATABASE_URL override other options.