peterberkenbosch

Stripe CreatePaymentIntent: Amount and Fee Handling

Your Observations Are Partially Correct

Amount Parameter (Decimal)

✅ Correct: The amount parameter comes in as a decimal (e.g., 10.00) and gets converted to cents internally:

def base_amount_in_cents
  (@amount.to_d * 100).to_i

peterberkenbosch

Customer Pays Fees: Historical Bug Fixes and Issues

This document contains historical information about bugs discovered and fixed during the implementation of the Customer Pays Fees feature. This is preserved for reference but is not part of the current operational documentation.

Timeline

April 2025: Initial Implementation

• Only updated Payments::CalculateFee with fee rates per payable type
• Stripe::CreatePaymentIntent and Payments::Create still hardcoded booking_fee
• Root cause of subsequent bugs: Multiple fee calculation points with inconsistent rates

peterberkenbosch

Rails 7 Solidus demo

Rails Starter Template

Use this template

(optional) Rebase upstream template repo

Make note of upstream sha when templated: 2add9da (https://cln.sh/ETfqYT) and the first commit sha from templated new repo: 85f49ba

peterberkenbosch

An error occurred while Layout/LineLength cop was inspecting /Users/peterberkenbosch/code/solidusio-contrib/solidus_affirm_v2/spec/views/spree/checkout/payment/affirm_v2_spec.rb:14:4.
can't modify frozen Array
/Users/peterberkenbosch/.gem/ruby/2.6.6/gems/rubocop-0.87.1/lib/rubocop/cop/mixin/check_line_breakable.rb:174:in `pop'
/Users/peterberkenbosch/.gem/ruby/2.6.6/gems/rubocop-0.87.1/lib/rubocop/cop/mixin/check_line_breakable.rb:174:in `process_args'
/Users/peterberkenbosch/.gem/ruby/2.6.6/gems/rubocop-0.87.1/lib/rubocop/cop/mixin/check_line_breakable.rb:47:in `extract_breakable_node'
/Users/peterberkenbosch/.gem/ruby/2.6.6/gems/rubocop-0.87.1/lib/rubocop/cop/layout/line_length.rb:102:in `check_for_breakable_node'
/Users/peterberkenbosch/.gem/ruby/2.6.6/gems/rubocop-0.87.1/lib/rubocop/cop/layout/line_length.rb:75:in `on_potential_breakable_node'
/Users/peterberkenbosch/.gem/ruby/2.6.6/gems/rubocop-0.87.1/lib/rubocop/cop/commissioner.rb:91:in `block (2 levels) in trigger_responding_cops'
/Users/peterberkenbo

peterberkenbosch

In this small guide I will share the setup I use to contribute to SpreeCommerce.

Disclaimer: This post contains some content written by me and others for the developer guides at SpreeCommerce.

Fork and setup upstream remote

Fork the repo the spree repository on github and clone the spree project on your local machine:

git clone YOUR-REPO-URL

peterberkenbosch

set = [1.1, 1.2, 0.85, 2.0, 1.3, 3.2]
geo_avg = (set.inject{|a,b| a*b}) ** (1.0/set.size)

peterberkenbosch

Spree.config do |config|
  config.send_core_emails = false
end

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config.payload_builder = {
  #... rest omitted for clearity.
  "Spree::Order" => { serializer: "Spree::Wombat::OrderSerializer", root: "orders", filter: "complete" }
}

peterberkenbosch

Spree::Order.class_eval do
  after_commit :wombat_push_spree_orders
  def wombat_push_spree_orders 
    if self.state == "complete" 
      payload_builder = Spree::Wombat::Config[:payload_builder]["Spree::Order"]
      payload = ActiveModel::ArraySerializer.new([order], 
        each_serializer: payload_builder[:serializer].constantize, 
        root: payload_builder[:root]
      ).to_json
      Spree::Wombat::Client.push(payload)

peterberkenbosch

attachment_config = {

  s3_credentials: {
    access_key_id:     ENV['AWS_ACCESS_KEY_ID'],
    secret_access_key: ENV['AWS_SECRET_ACCESS_KEY'],
    bucket:            ENV['S3_BUCKET_NAME']
  },

  storage:        :s3,
  s3_headers:     { "Cache-Control" => "max-age=31557600" },