Merge pull request 'Let users donate sats via BTCPay Server' (#176) from feature/donations_btcpay into master

Reviewed-on: #176
Reviewed-by: galfert <garret.alfert@gmail.com>

app/assets/stylesheets/components/buttons.css

@@ -32,6 +32,11 @@
            focus:ring-blue-400 focus:ring-opacity-75;
   }
 
+  .btn-emerald {
+    @apply bg-emerald-500 hover:bg-emerald-600 text-white
+           focus:ring-emerald-400 focus:ring-opacity-75;
+  }
+
   .btn-red {
     @apply bg-red-600 hover:bg-red-700 text-white
            focus:ring-red-500 focus:ring-opacity-75;

app/components/main_with_tabnav_component.html.erb

@@ -1,5 +1,5 @@
 <main class="w-full max-w-6xl mx-auto pb-12 px-4 md:px-6 lg:px-8">
-  <div class="bg-white rounded-lg shadow">
+  <div class="md:min-h-[50vh] bg-white rounded-lg shadow">
     <div class="px-6 sm:px-12 pt-2 sm:pt-4">
       <%= render partial: @tabnav_partial %>
     </div>

app/components/modal_component.html.erb

@@ -12,7 +12,7 @@
 
     <!-- Modal Container -->
     <div data-modal-target="container"
-         class="max-h-screen w-auto max-w-lg relative
+         class="relative m-4 max-h-screen w-auto max-w-full
                 hidden animate-scale-in fixed inset-0 overflow-y-auto flex items-center justify-center">
       <!-- Modal Card -->
       <div class="m-1 bg-white rounded shadow">

app/components/notification_component.rb

@@ -34,6 +34,8 @@ class NotificationComponent < ViewComponent::Base
       'alert-octagon'
     when 'alert'
       'alert-octagon'
+    when 'warning'
+      'alert-octagon'
     else
       'info'
     end

app/controllers/admin/donations_controller.rb

@@ -3,18 +3,16 @@ class Admin::DonationsController < Admin::BaseController
   before_action :set_current_section, only: [:index, :show, :new, :edit]
 
   # GET /donations
-  # GET /donations.json
   def index
-    @pagy, @donations = pagy(Donation.all.order('created_at desc'))
+    @pagy, @donations = pagy(Donation.completed.order('paid_at desc'))
 
     @stats = {
-      overall_sats: @donations.all.sum("amount_sats"),
-      donor_count: Donation.distinct.count(:user_id)
+      overall_sats: @donations.sum("amount_sats"),
+      donor_count: @donations.distinct.count(:user_id)
     }
   end
 
   # GET /donations/1
-  # GET /donations/1.json
   def show
   end
 
@@ -28,54 +26,41 @@ class Admin::DonationsController < Admin::BaseController
   end
 
   # POST /donations
-  # POST /donations.json
   def create
     @donation = Donation.new(donation_params)
 
-    respond_to do |format|
-      if @donation.save
-        format.html do
-          redirect_to admin_donation_url(@donation), flash: {
-            success: 'Donation was successfully created.'
-          }
-        end
-        format.json { render :show, status: :created, location: @donation }
-      else
-        format.html { render :new, status: :unprocessable_entity }
-        format.json { render json: @donation.errors, status: :unprocessable_entity }
-      end
+    if @donation.paid_at == nil
+      @donation.errors.add(:paid_at, message: "is required")
+      render :new, status: :unprocessable_entity and return
+    end
+
+    if @donation.save
+      redirect_to admin_donation_url(@donation), flash: {
+        success: 'Donation was successfully created.'
+      }
+    else
+      render :new, status: :unprocessable_entity
     end
   end
 
-  # PATCH/PUT /donations/1
-  # PATCH/PUT /donations/1.json
+  # PUT /donations/1
   def update
-    respond_to do |format|
-      if @donation.update(donation_params)
-        format.html do
-          redirect_to admin_donation_url(@donation), flash: {
-            success: 'Donation was successfully updated.'
-          }
-        end
-        format.json { render :show, status: :ok, location: @donation }
-      else
-        format.html { render :edit, status: :unprocessable_entity }
-        format.json { render json: @donation.errors, status: :unprocessable_entity }
-      end
+    if @donation.update(donation_params)
+      redirect_to admin_donation_url(@donation), flash: {
+        success: 'Donation was successfully updated.'
+      }
+    else
+      render :edit, status: :unprocessable_entity
     end
   end
 
   # DELETE /donations/1
-  # DELETE /donations/1.json
   def destroy
     @donation.destroy
-    respond_to do |format|
-      format.html do redirect_to admin_donations_url, flash: {
-        success: 'Donation was successfully destroyed.'
-      }
-      end
-      format.json { head :no_content }
-    end
+
+    redirect_to admin_donations_url, flash: {
+      success: 'Donation was successfully destroyed.'
+    }
   end
 
   private
@@ -86,7 +71,10 @@ class Admin::DonationsController < Admin::BaseController
 
     # Only allow a list of trusted parameters through.
     def donation_params
-      params.require(:donation).permit(:user_id, :amount_sats, :amount_eur, :amount_usd, :public_name, :paid_at)
+      params.require(:donation).permit(
+        :user_id, :donation_method,
+        :amount_sats, :fiat_amount, :fiat_currency,
+        :public_name, :paid_at)
     end
 
     def set_current_section

app/controllers/application_controller.rb

@@ -41,4 +41,26 @@ class ApplicationController < ActionController::Base
   def after_sign_in_path_for(user)
     session[:user_return_to] || root_path
   end
+
+  def lndhub_authenticate(options={})
+    if session[:ln_auth_token].present? && !options[:force_reauth]
+      @ln_auth_token = session[:ln_auth_token]
+    else
+      lndhub = Lndhub.new
+      auth_token = lndhub.authenticate(current_user)
+      session[:ln_auth_token] = auth_token
+      @ln_auth_token = auth_token
+    end
+  rescue => e
+    Sentry.capture_exception(e) if Setting.sentry_enabled?
+  end
+
+  def lndhub_fetch_balance
+    @balance = LndhubManager::FetchUserBalance.call(auth_token: @ln_auth_token)
+  rescue AuthError
+    lndhub_authenticate(force_reauth: true)
+    raise if @fetch_balance_retried
+    @fetch_balance_retried = true
+    lndhub_fetch_balance
+  end
 end

app/controllers/contributions/donations_controller.rb

@@ -1,10 +1,129 @@
 class Contributions::DonationsController < ApplicationController
-  before_action :authenticate_user!
+  include BtcpayHelper
 
-  # GET /donations
-  # GET /donations.json
+  before_action :authenticate_user!
+  before_action :set_donation_methods, only: [:index, :create]
+  before_action :require_donation_method_enabled, only: [:create]
+  before_action :validate_donation_params, only: [:create]
+  before_action :set_donation, only: [:confirm_btcpay]
+
+  # GET /contributions/donations
   def index
-    @donations = current_user.donations.completed
     @current_section = :contributions
+    @donations_completed = current_user.donations.completed.order('paid_at desc')
+    @donations_pending = current_user.donations.processing.order('created_at desc')
+
+    if Setting.lndhub_enabled?
+      begin
+        lndhub_authenticate
+        lndhub_fetch_balance
+      rescue
+        @balance = 0
+      end
+    end
   end
+
+  # POST /contributions/donations
+  def create
+    if params[:currency] == "sats"
+      fiat_amount = nil
+      fiat_currency = nil
+      amount_sats = params[:amount]
+    else
+      fiat_amount = params[:amount].to_i
+      fiat_currency = params[:currency]
+      amount_sats = nil
+    end
+
+    @donation = current_user.donations.create!(
+      donation_method: params[:donation_method],
+      payment_method: nil,
+      paid_at: nil,
+      amount_sats: amount_sats,
+      fiat_amount: (fiat_amount.nil? ? nil : fiat_amount * 100), # store in cents
+      fiat_currency: fiat_currency,
+      public_name: params[:public_name]
+    )
+
+    case params[:donation_method]
+    when "btcpay"
+      res = BtcpayManager::CreateInvoice.call(
+        amount: fiat_amount || (amount_sats.to_f / 100000000),
+        currency: fiat_currency || "BTC",
+        redirect_url: confirm_btcpay_contributions_donation_url(@donation)
+      )
+
+      @donation.update! btcpay_invoice_id: res["id"]
+
+      redirect_to btcpay_checkout_url(res["id"]), allow_other_host: true
+    else
+      redirect_to contributions_donations_url, flash: {
+        error: "Donation method currently not available"
+      }
+    end
+  end
+
+  def confirm_btcpay
+    redirect_to contributions_donations_url and return if @donation.completed?
+
+    invoice = BtcpayManager::FetchInvoice.call(invoice_id: @donation.btcpay_invoice_id)
+
+    if @donation.amount_sats.present?
+      # TODO make default fiat currency configurable and/or determine from user's
+      # i18n browser settings
+      @donation.fiat_currency = "EUR"
+      exchange_rate = BtcpayManager::FetchExchangeRate.call(fiat_currency: @donation.fiat_currency)
+      @donation.fiat_amount = (((@donation.amount_sats.to_f / 100000000) * exchange_rate) * 100).to_i
+    else
+      amt_str = invoice["paymentMethods"].first["amount"]
+      @donation.amount_sats = amt_str.tr(".","").sub(/0*$/, "").to_i
+    end
+
+    case invoice["status"]
+    when "Settled"
+      @donation.paid_at = DateTime.now
+      @donation.payment_status = "settled"
+      @donation.save!
+      flash_message = { success: "Thank you!" }
+    when "Processing"
+      unless @donation.processing?
+        @donation.payment_status = "processing"
+        @donation.save!
+        flash_message = { success: "Thank you! We will send you an email when the payment is confirmed." }
+        BtcpayCheckDonationJob.set(wait: 20.seconds).perform_later(@donation)
+      end
+    when "Expired"
+      flash_message = { warning: "The payment request for this donation has expired" }
+    else
+      flash_message = { warning: "Could not determine status of payment" }
+    end
+
+    redirect_to contributions_donations_url, flash: flash_message
+  end
+
+  private
+
+    def set_donation
+      @donation = current_user.donations.find_by(id: params[:id])
+      http_status :not_found unless @donation.present?
+    end
+
+    def set_donation_methods
+      @donation_methods = []
+      @donation_methods.push :btcpay if Setting.btcpay_enabled?
+      @donation_methods.push :lndhub if Setting.lndhub_enabled?
+      @donation_methods.push :opencollective if Setting.opencollective_enabled?
+    end
+
+    def require_donation_method_enabled
+      http_status :forbidden unless @donation_methods.include?(
+        params[:donation_method].to_sym
+      )
+    end
+
+    def validate_donation_params
+      if !%w[EUR USD sats].include?(params[:currency]) || (params[:amount].to_i <= 0)
+        http_status :unprocessable_entity
+      end
+    end
 end

app/controllers/services/lightning_controller.rb

@@ -2,10 +2,11 @@ require "rqrcode"
 require "lnurl"
 
 class Services::LightningController < ApplicationController
-  before_action :authenticate_user!
-  before_action :authenticate_with_lndhub
   before_action :set_current_section
-  before_action :fetch_balance
+  before_action :require_service_available
+  before_action :authenticate_user!
+  before_action :lndhub_authenticate
+  before_action :lndhub_fetch_balance
 
   def index
     @wallet_setup_url = "lndhub://#{current_user.ln_account}:#{current_user.ln_password}@#{ENV['LNDHUB_PUBLIC_URL']}"
@@ -55,32 +56,12 @@ class Services::LightningController < ApplicationController
 
   private
 
-  def authenticate_with_lndhub(options={})
-    if session[:ln_auth_token].present? && !options[:force_reauth]
-      @ln_auth_token = session[:ln_auth_token]
-    else
-      lndhub = Lndhub.new
-      auth_token = lndhub.authenticate(current_user)
-      session[:ln_auth_token] = auth_token
-      @ln_auth_token = auth_token
-    end
-  rescue => e
-    Sentry.capture_exception(e) if Setting.sentry_enabled?
-  end
-
   def set_current_section
     @current_section = :services
   end
 
-  def fetch_balance
-    lndhub = Lndhub.new
-    data = lndhub.balance @ln_auth_token
-    @balance = data["BTC"]["AvailableBalance"] rescue nil
-  rescue AuthError
-    authenticate_with_lndhub(force_reauth: true)
-    raise if @fetch_balance_retried
-    @fetch_balance_retried = true
-    fetch_balance
+  def require_service_available
+    http_status :not_found unless Setting.lndhub_enabled?
   end
 
   def fetch_transactions

app/helpers/application_helper.rb

@@ -1,10 +1,6 @@
 module ApplicationHelper
   include Pagy::Frontend
 
-  def sats_to_btc(sats)
-    sats.to_f / 100000000
-  end
-
   def main_nav_class(current_section, link_to_section)
     if current_section == link_to_section
       "bg-gray-900/50 text-white px-3 py-2 rounded-md font-medium text-base md:text-sm block md:inline-block"

app/helpers/btcpay_helper.rb

@@ -0,0 +1,7 @@
+module BtcpayHelper
+
+  def btcpay_checkout_url(invoice_id)
+    "#{Setting.btcpay_public_url}/i/#{invoice_id}"
+  end
+
+end

app/jobs/btcpay_check_donation_job.rb

@@ -0,0 +1,28 @@
+class BtcpayCheckDonationJob < ApplicationJob
+  queue_as :default
+
+  def perform(donation)
+    return if donation.completed?
+
+    invoice = BtcpayManager::FetchInvoice.call(
+      invoice_id: donation.btcpay_invoice_id
+    )
+
+    case invoice["status"]
+    when "Settled"
+      donation.paid_at = DateTime.now
+      donation.payment_status = "settled"
+      donation.save!
+
+      NotificationMailer.with(user: donation.user)
+                        .bitcoin_donation_confirmed
+                        .deliver_later
+    when "Processing"
+      re_enqueue_job(donation)
+    end
+  end
+
+  def re_enqueue_job(donation)
+    self.class.set(wait: 20.seconds).perform_later(donation)
+  end
+end

app/mailers/notification_mailer.rb

@@ -23,4 +23,11 @@ class NotificationMailer < ApplicationMailer
     @subject = "New invitations added to your account"
     mail to: @user.email, subject: @subject
   end
+
+  def bitcoin_donation_confirmed
+    @user = params[:user]
+    @donation = params[:donation]
+    @subject = "Donation confirmed"
+    mail to: @user.email, subject: @subject
+  end
 end

app/models/donation.rb

@@ -4,12 +4,25 @@ class Donation < ApplicationRecord
 
   # Validations
   validates_presence_of :user
-  validates_presence_of :amount_sats
-  validates_presence_of :paid_at
-
-  # Hooks
-  # TODO before_create :store_fiat_value
+  validates_presence_of :donation_method,
+    inclusion: { in: %w[ custom btcpay lndhub ] }
+  validates_presence_of :payment_status, allow_nil: true,
+    inclusion: { in: %w[ processing settled ] }
+  validates_presence_of :paid_at, allow_nil: true
+  validates_presence_of :amount_sats, allow_nil: true
+  validates_presence_of :fiat_amount, allow_nil: true
+  validates_presence_of :fiat_currency, allow_nil: true,
+    inclusion: { in: %w[ EUR USD ] }
 
   #Scopes
-  scope :completed, -> { where.not(paid_at: nil) }
+  scope :processing, -> { where(payment_status: "processing") }
+  scope :completed, -> { where(payment_status: "settled") }
+
+  def processing?
+    payment_status == "processing"
+  end
+
+  def completed?
+    payment_status == "settled"
+  end
 end

app/models/setting.rb

@@ -51,6 +51,9 @@ class Setting < RailsSettings::Base
   field :btcpay_enabled, type: :boolean,
     default: ENV["BTCPAY_API_URL"].present?
 
+  field :btcpay_public_url, type: :string,
+    default: ENV["BTCPAY_PUBLIC_URL"].presence
+
   field :btcpay_store_id, type: :string,
     default: ENV["BTCPAY_STORE_ID"].presence
 
@@ -157,7 +160,13 @@ class Setting < RailsSettings::Base
   # Nostr
   #
 
-  field :nostr_enabled, type: :boolean, default: true
+  field :nostr_enabled, type: :boolean, default: false
+
+  #
+  # OpenCollective
+  #
+
+  field :opencollective_enabled, type: :boolean, default: true
 
   #
   # RemoteStorage

app/services/btcpay_manager/create_invoice.rb

@@ -0,0 +1,21 @@
+module BtcpayManager
+  class CreateInvoice < BtcpayManagerService
+    def initialize(amount:, currency:, redirect_url:)
+      @amount = amount
+      @currency = currency
+      @redirect_url = redirect_url
+    end
+
+    def call
+      post "/invoices", {
+        amount: @amount.to_s,
+        currency: @currency,
+        checkout: {
+          redirectURL: @redirect_url,
+          redirectAutomatically: true,
+          requiresRefundEmail: false
+        }
+      }
+    end
+  end
+end

app/services/btcpay_manager/fetch_exchange_rate.rb

@@ -0,0 +1,14 @@
+module BtcpayManager
+  class FetchExchangeRate < BtcpayManagerService
+    def initialize(fiat_currency:)
+      @fiat_currency = fiat_currency
+    end
+
+    def call
+      pair_str = "BTC_#{@fiat_currency}"
+      res = get "rates", { currencyPair: pair_str }
+      pair = res.find{|p| p["currencyPair"] == pair_str }
+      rate = pair["rate"].to_f
+    end
+  end
+end

app/services/btcpay_manager/fetch_invoice.rb

@@ -0,0 +1,14 @@
+module BtcpayManager
+  class FetchInvoice < BtcpayManagerService
+    def initialize(invoice_id:)
+      @invoice_id = invoice_id
+    end
+
+    def call
+      invoice = get "/invoices/#{@invoice_id}"
+      payment_methods = get "/invoices/#{@invoice_id}/payment-methods"
+      invoice["paymentMethods"] = payment_methods
+      invoice
+    end
+  end
+end

app/services/btcpay_manager/fetch_lightning_wallet_balance.rb

@@ -1,7 +1,7 @@
 module BtcpayManager
   class FetchLightningWalletBalance < BtcpayManagerService
     def call
-      res = get "stores/#{store_id}/lightning/BTC/balance"
+      res = get "/lightning/BTC/balance"
 
       {
         confirmed_balance: res["offchain"]["local"].to_i / 1000 # msats to sats

app/services/btcpay_manager/fetch_onchain_wallet_balance.rb

@@ -1,7 +1,7 @@
 module BtcpayManager
   class FetchOnchainWalletBalance < BtcpayManagerService
     def call
-      res = get "stores/#{store_id}/payment-methods/onchain/BTC/wallet"
+      res = get "/payment-methods/onchain/BTC/wallet"
 
       {
         balance: (res["balance"].to_f * 100000000).to_i, # BTC to sats

app/services/btcpay_manager_service.rb

@@ -2,23 +2,35 @@
 # API Docs: https://docs.btcpayserver.org/API/Greenfield/v1/
 #
 class BtcpayManagerService < ApplicationService
-  attr_reader :base_url, :store_id, :auth_token
-
-  def initialize
-    @base_url   = Setting.btcpay_api_url
-    @store_id   = Setting.btcpay_store_id
-    @auth_token = Setting.btcpay_auth_token
-  end
-
   private
 
-    def get(endpoint)
-      res = Faraday.get("#{base_url}/#{endpoint}", {}, {
+    def base_url
+      @base_url ||= "#{Setting.btcpay_api_url}/stores/#{Setting.btcpay_store_id}"
+    end
+
+    def auth_token
+      @auth_token ||= Setting.btcpay_auth_token
+    end
+
+    def headers
+      {
         "Content-Type" => "application/json",
         "Accept" => "application/json",
         "Authorization" => "token #{auth_token}"
-      })
+      }
+    end
 
+    def endpoint_url(path)
+      "#{base_url}/#{path.gsub(/^\//, '')}"
+    end
+
+    def get(path, params = {})
+      res = Faraday.get endpoint_url(path), params, headers
+      JSON.parse(res.body)
+    end
+
+    def post(path, payload)
+      res = Faraday.post endpoint_url(path), payload.to_json, headers
       JSON.parse(res.body)
     end
 end

app/services/lndhub.rb

@@ -1,24 +1,20 @@
-class Lndhub
+class Lndhub < ApplicationService
   attr_accessor :auth_token
 
-  def initialize
-    @base_url = ENV["LNDHUB_API_URL"]
-  end
-
-  def post(endpoint, payload)
+  def post(path, payload)
     headers = { "Content-Type" => "application/json" }
     if auth_token
       headers.merge!({ "Authorization" => "Bearer #{auth_token}" })
     end
 
-    res = Faraday.post "#{@base_url}/#{endpoint}", payload.to_json, headers
+    res = Faraday.post endpoint_url(path), payload.to_json, headers
     log_error(res) if res.status != 200
 
     JSON.parse(res.body)
   end
 
-  def get(endpoint, auth_token)
-    res = Faraday.get("#{@base_url}/#{endpoint}", {}, {
+  def get(path, auth_token)
+    res = Faraday.get(endpoint_url(path), {}, {
       "Content-Type" => "application/json",
       "Accept" => "application/json",
       "Authorization" => "Bearer #{auth_token}"
@@ -42,7 +38,7 @@ class Lndhub
     self.auth_token
   end
 
-  def balance(user_token=nil)
+  def fetch_balance(user_token=nil)
     get "balance", user_token || auth_token
   end
 
@@ -72,4 +68,14 @@ class Lndhub
       Sentry.capture_message("Lndhub API request failed: #{res.body}")
     end
   end
+
+  private
+
+    def base_url
+      @base_url ||= Setting.lndhub_api_url
+    end
+
+    def endpoint_url(path)
+      "#{base_url}/#{path.gsub(/^\//, '')}"
+    end
 end

app/services/lndhub_manager/fetch_user_balance.rb

@@ -0,0 +1,12 @@
+module LndhubManager
+  class FetchUserBalance < Lndhub
+    def initialize(auth_token:)
+      @auth_token = auth_token
+    end
+
+    def call
+      data = fetch_balance(auth_token)
+      data["BTC"]["AvailableBalance"] rescue nil
+    end
+  end
+end

app/services/lndhub_v2.rb

@@ -1,13 +1,13 @@
 class LndhubV2 < Lndhub
 
-  def post(endpoint, payload, options={})
+  def post(path, payload, options={})
     headers = { "Content-Type" => "application/json" }
     if auth_token
       headers.merge!({ "Authorization" => "Bearer #{auth_token}" })
     elsif options[:admin_token]
       headers.merge!({ "Authorization" => "Bearer #{options[:admin_token]}" })
     end
-    res = Faraday.post "#{@base_url}/#{endpoint}", payload.to_json, headers
+    res = Faraday.post endpoint_url(path), payload.to_json, headers
     log_error(res) if res.status != 200
 
     JSON.parse(res.body)

app/views/admin/donations/_donation.json.jbuilder

@@ -1,2 +0,0 @@
-json.extract! donation, :id, :user_id, :amount_sats, :amount_eur, :amount_usd, :public_name, :created_at, :updated_at
-json.url donation_url(donation, format: :json)

app/views/admin/donations/_form.html.erb

@@ -14,14 +14,24 @@
     <%= form.label :user_id %>
     <%= form.collection_select :user_id, User.where(ou: Setting.primary_domain).order(:cn), :id, :cn, {} %>
 
+    <%= form.label :donation_method, "Donation method" %>
+    <%= form.select :donation_method, options_for_select([
+          ["Custom (manual)", "custom"],
+          ["BTCPay", "btcpay"],
+          ["LndHub account", "lndhub"],
+          ["OpenCollective", "opencollective"]
+        ], selected: (donation.donation_method || "custom")) %>
+
     <%= form.label :amount_sats, "Amount BTC (sats)" %>
     <%= form.number_field :amount_sats %>
 
-    <%= form.label :amount_eur, "Amount EUR (cents)" %>
-    <%= form.number_field :amount_eur %>
+    <%= form.label :fiat_amount, "Fiat Amount (cents)" %>
+    <%= form.number_field :fiat_amount %>
 
-    <%= form.label :amount_usd, "Amount USD (cents)"%>
-    <%= form.number_field :amount_usd %>
+    <%= form.label :fiat_currency, "Fiat Currency" %>
+    <%= form.select :fiat_currency, options_for_select([
+          ["EUR", "EUR"], ["USD", "USD"], ["sats", "sats"]
+        ], selected: donation.fiat_currency) %>
 
     <%= form.label :public_name %>
     <%= form.text_field :public_name %>

app/views/admin/donations/index.html.erb

@@ -25,9 +25,8 @@
       <thead>
         <tr>
           <th>User</th>
-          <th class="text-right">Amount BTC</th>
-          <th class="text-right">in EUR</th>
-          <th class="text-right">in USD</th>
+          <th class="text-right">Sats</th>
+          <th class="text-right">Fiat Amount</th>
           <th class="pl-2">Public name</th>
           <th>Date</th>
           <th></th>
@@ -37,9 +36,8 @@
         <% @donations.each do |donation| %>
           <tr>
             <td><%= link_to donation.user.address, admin_user_path(donation.user.address), class: 'ks-text-link' %></td>
-            <td class="text-right"><%= sats_to_btc donation.amount_sats %></td>
-            <td class="text-right"><% if donation.amount_eur.present? %><%= number_to_currency donation.amount_eur / 100, unit: "" %><% end %></td>
-            <td class="text-right"><% if donation.amount_usd.present? %><%= number_to_currency donation.amount_usd / 100, unit: "" %><% end %></td>
+            <td class="text-right"><% if donation.amount_sats.present? %><%= number_with_delimiter donation.amount_sats %><% end %></td>
+            <td class="text-right"><% if donation.fiat_amount.present? %><%= number_to_currency donation.fiat_amount.to_f / 100, unit: "" %> <%= donation.fiat_currency %><% end %></td>
             <td class="pl-2"><%= donation.public_name %></td>
             <td><%= donation.paid_at ? donation.paid_at.strftime("%Y-%m-%d (%H:%M UTC)") : "" %></td>
             <td class="text-right">

app/views/admin/donations/index.json.jbuilder

@@ -1 +0,0 @@
-json.array! @donations, partial: "donations/donation", as: :donation

app/views/admin/donations/show.html.erb

@@ -8,17 +8,17 @@
           <th>User</th>
           <td><%= link_to @donation.user.address, admin_user_path(@donation.user.address), class: 'ks-text-link' %></td>
         </tr>
+        <tr>
+          <th>Donation Method</th>
+          <td><%= @donation.donation_method %></td>
+        </tr>
         <tr>
           <th>Amount sats</th>
           <td><%= @donation.amount_sats %></td>
         </tr>
         <tr>
-          <th>Amount EUR</th>
-          <td><%= @donation.amount_eur %></td>
-        </tr>
-        <tr>
-          <th>Amount USD</th>
-          <td><%= @donation.amount_usd %></td>
+          <th>Fiat amount</th>
+          <td><% if @donation.fiat_amount.present? %><%= number_to_currency @donation.fiat_amount.to_f / 100, unit: "" %> <%= @donation.fiat_currency %><% end %></td>
         </tr>
         <tr>
           <th>Public name</th>
@@ -26,7 +26,7 @@
         </tr>
         <tr>
           <th>Date</th>
-          <td><%= @donation.paid_at.strftime("%Y-%m-%d (%H:%M UTC)") %></td>
+          <td><%= @donation.paid_at&.strftime("%Y-%m-%d (%H:%M UTC)") %></td>
         </tr>
       </tbody>
     </table>

app/views/admin/donations/show.json.jbuilder

@@ -1 +0,0 @@
-json.partial! "donations/donation", donation: @donation

app/views/contributions/donations/_bitcoin.html.erb

@@ -0,0 +1,36 @@
+<div class="rounded-lg p-6 bg-emerald-50 hover:bg-emerald-100 transition-colors">
+  <h3 class="mb-4 text-lg font-bold">Donate directly with Bitcoin</h3>
+  <p class="mb-6">
+    Open-source money for open-source services.
+  </p>
+  <div data-controller="modal" data-action="keydown.esc->modal#close">
+    <button class="btn-md btn-emerald w-full lg:w-1/2" data-action="click->modal#open">
+      Donate
+    </button>
+    <%= render ModalComponent.new(show_close_button: false) do %>
+      <div>
+        <h3>Your contribution</h3>
+
+        <%= form_with(url: contributions_donations_url, method: :post) do |f| %>
+          <%= f.hidden_field :donation_method, value: "btcpay" %>
+
+          <div class="mb-6 flex gap-2">
+            <%= f.number_field :amount, required: true %>
+            <%= f.select :currency, options_for_select([
+                  ["EUR", "EUR"], ["USD", "USD"], ["sats", "sats"]
+                ], selected: "EUR"), class: "flex-none" %>
+          </div>
+
+          <%= render FormElements::FieldsetComponent.new(tag: "div", title: "Public name") do %>
+            <%= f.text_field :public_name, class: "w-full", placeholder: "Anonymous"  %>
+          <% end %>
+
+          <p class="mt-12">
+            <%= f.submit 'Continue', data: { turbo: false },
+                  class: "btn-md btn-blue w-full" %>
+          </p>
+        <% end %>
+      </div>
+    <% end %>
+  </div>
+</div>

app/views/contributions/donations/_list.html.erb

@@ -0,0 +1,37 @@
+<ul class="list-none">
+  <% donations.each do |donation| %>
+    <li class="mb-8 grid gap-y-2 grid-cols-2 items-center">
+      <h3 class="mb-0">
+        <% if donation.completed? %>
+        <%= donation.paid_at.strftime("%B %d, %Y") %>
+        <% else %>
+        <%= donation.created_at.strftime("%B %d, %Y") %>
+        <% end %>
+      </h3>
+      <p class="row-span-2 font-mono text-right mb-0">
+        <span class="text-xl">
+          <%= number_with_delimiter donation.amount_sats %> sats
+        </span>
+        <br>
+        <span class="text-sm text-gray-500">
+          (~ <%= number_to_currency donation.fiat_amount.to_f / 100, unit: "" %> <%= donation.fiat_currency %>)
+        </span>
+      </p>
+      <p class="mb-0 text-gray-500">
+        <% if donation.processing? %>
+          Waiting for confirmations
+          <% if donation.donation_method == "btcpay" %>
+            <%= link_to "check status", btcpay_checkout_url(donation.btcpay_invoice_id),
+                  class: "ml-2 btn-sm btn-gray" %>
+          <% end %>
+        <% else %>
+          <% if donation.public_name.present? %>
+            As: <%= donation.public_name %>
+          <% else %>
+            Anonymous
+          <% end %>
+        <% end %>
+      </p>
+    </li>
+  <% end %>
+</ul>

app/views/contributions/donations/_opencollective.html.erb

@@ -0,0 +1,6 @@
+<div class="rounded-lg p-6 bg-zinc-100 hover:bg-zinc-200 transition-colors">
+  <h3 class="mb-4 text-lg font-bold text-gray-500">Donate via OpenCollective</h3>
+  <p class="text-gray-600 text-gray-500">
+    Coming soon.
+  </p>
+</div>

app/views/contributions/donations/index.html.erb

@@ -2,50 +2,39 @@
 
 <%= render MainWithTabnavComponent.new(tabnav_partial: "shared/tabnav_contributions") do %>
   <section>
-    <% if @donations.any? %>
-      <p class="mb-12">
-        Your financial contributions to the development and upkeep of Kosmos
-        software and services.
-      </p>
-      <ul class="list-none">
-        <% @donations.each do |donation| %>
-          <li class="mb-8 grid gap-y-2 gap-x-8 grid-cols-2 items-center">
-            <h3 class="mb-0">
-              <%= donation.paid_at.strftime("%B %d, %Y") %>
-            </h3>
-            <p class="row-span-2 font-mono text-right mb-0">
-              <span class="text-xl">
-                <%= number_with_delimiter donation.amount_sats %> sats
-              </span>
-              <br>
-              <span class="text-sm text-gray-500">
-                (~ <%= number_to_currency donation.amount_eur / 100, unit: "" %> EUR)
-              </span>
-            </p>
-            <p class="mb-0">
-              <% if donation.public_name.present? %>
-                Public name: <%= donation.public_name %>
-              <% else %>
-                Anonymous
-              <% end %>
-            </p>
-          </li>
-        <% end %>
-      </ul>
-    <% else %>
-      <div class="text-center">
-        <p class="mt-8 mb-12 inline-flex align-center items-center">
-          <%= image_tag("/img/illustrations/undraw_savings_re_eq4w.svg", class: 'h-48') %>
-        </p>
-        <h3>
-          No donations yet
-        </h3>
-        <p class="text-gray-500">
-          The donation process is not automated yet.<br>Please
-          <a href="https://wiki.kosmos.org/Main_Page#Community_.2F_Getting_in_touch_.2F_Getting_involved" class="ks-text-link" target="_blank">contact us</a>
-          if you'd like to contribute this way right now.
-        </p>
-      </div>
-    <% end %>
+    <p class="mb-12">
+      Your financial contributions to the development and upkeep of Kosmos
+      software and services.
+    </p>
   </section>
+
+  <section class="donation-methods">
+    <div class="grid grid-cols-1 sm:grid-cols-2 gap-4 sm:gap-6">
+      <% if @donation_methods.include?(:btcpay) ||
+            @donation_methods.include?(:lndhub) %>
+        <%= render partial: "contributions/donations/bitcoin", locals: {
+          donation_methods: @donation_methods, lndhub_balance: @balance
+        } %>
+      <% end %>
+      <% if @donation_methods.include?(:opencollective) %>
+        <%= render partial: "contributions/donations/opencollective" %>
+      <% end %>
+    </div>
+  </section>
+
+  <% if @donations_pending.any? %>
+  <section class="donation-list">
+    <h2>Pending</h2>
+    <%= render partial: "contributions/donations/list",
+               locals: { donations: @donations_pending } %>
+  </section>
+  <% end %>
+
+  <% if @donations_completed.any? %>
+  <section class="donation-list">
+    <h2>Past contributions</h2>
+    <%= render partial: "contributions/donations/list",
+               locals: { donations: @donations_completed } %>
+  </section>
+  <% end %>
 <% end %>

app/views/notification_mailer/bitcoin_donation_confirmed.text.erb

@@ -0,0 +1,11 @@
+Hi <%= @user.display_name.presence || @user.cn %>,
+
+Your bitcoin donation has been confirmed successfully. <3
+
+Thank you so much for helping us with keeping the lights on, as well as with continually improving our services for you!
+
+You can find all of your past financial contributions on this page:
+
+<%= contributions_donations_url %>
+
+Have a nice day!

app/views/shared/status_unprocessable_entity.html.erb

@@ -0,0 +1,6 @@
+<%= render HeaderCompactComponent.new(title: "422") %>
+
+<%= render MainCompactComponent.new do %>
+  <h2>Unprocessable content</h2>
+  <p>The data provided was malformed. Please go back and try again.</p>
+<% end %>