ferhaty

FROM crystallang/crystal:0.27.0 as compiler
RUN mkdir /src
COPY . /src
WORKDIR /src
RUN shards install && crystal build src/PaymentService.cr --static --release --no-debug -o bin/PaymentService

FROM scratch
COPY --from=compiler /src/bin/PaymentService .
EXPOSE 3000
CMD ["./PaymentService"]

ferhaty

require "../src/PaymentRequest"
require "../src/PaymentResult"

class PaymentExecutionService
  def pay(request : PaymentRequest)
    # Perform Magic
    # ....
    paymentResult = PaymentResult.new

    # Transaction limit of < 2500

ferhaty

require "kemal"
require "../src/PaymentExecutionService"

get "/pay" do |request|
  paymentAmount = request.params.query["amount"].to_f
  paymentService = PaymentExecutionService.new()
  paymentRequest = PaymentRequest.new(paymentAmount)
  paymentResult = paymentService.pay(paymentRequest)

  paymentSuccessful = paymentResult.successful

ferhaty

require "http/server"

server = HTTP::Server.new do |context|
  context.response.content_type = "text/plain"
  context.response.print "Hello world! The time is #{Time.now}"
end

address = server.bind_tcp 8080
puts "Listening on http://#{address}"
server.listen

ferhaty

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• I am ferhaty on github.
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To claim this, I am signing this object: