Light Wallet Service (for FnFn)

Development

Package management

Since Go hasn't a best package management solution until v1.11 (2018-08-31), we use dep (officially supported) for managing packages simply and temporarily.

brew install dep # install dep tool

dep init # migrate depedencies from `vendor/` by other tools

dep ensure # sync and install all dependencies into `vender/`

dep ensure -add github.com/user/xxx-repo # something like `go get` but fetch package into `vendor/` and update Gopkg.toml/Gopkg.lock file

Related 3rd-party Services

LWS requires MySQL, mqtt(mock server), RabbitMQ and redis as related services. In local development, we use Docker to manage them:

# where docker-compose.yml located
cd test/mock
# start services
docker-compose up -d
# stop services
docker-compose down

Environment Variables

We are using godotenv to manange variables in .env file (no required). To install the command-line tool:

go get github.com/joho/godotenv/cmd/godotenv

Then in local development:

# run
godotenv go run path/to/main.go
# test
godotenv go test ./...

In CI test, the environment variables should be configured in the CI panel.

In production, the environment variables should be used as normal env way or configured in CD panel.

Database

Migration

Up:

go run cmd/db/migrate.go

Down:

go run cmd/db/migrate.go -1