0.3.0

Reviewed-on: #65

app/controllers/lnurlpay_controller.rb

@@ -3,6 +3,7 @@ class LnurlpayController < ApplicationController
 
   MIN_SATS = 100
   MAX_SATS = 1_000_000
+  MAX_COMMENT_CHARS = 100
 
   def index
     render json: {
@@ -12,22 +13,32 @@ class LnurlpayController < ApplicationController
       maxSendable: MAX_SATS * 1000, # msat
       minSendable: MIN_SATS * 1000, # msat
       metadata: metadata(@user.address),
-      commentAllowed: 0
+      commentAllowed: MAX_COMMENT_CHARS
     }
   end
 
   def invoice
     amount = params[:amount].to_i / 1000 # msats
     address = params[:address]
+    comment = params[:comment] || ""
 
     if !valid_amount?(amount)
       render json: { status: "ERROR", reason: "Invalid amount" }
       return
     end
 
+    if !valid_comment?(comment)
+      render json: { status: "ERROR", reason: "Comment too long" }
+      return
+    end
+
+    memo = "Sats for #{address}"
+    memo = "#{memo}: \"#{comment}\"" if comment.present?
+
     payment_request = @user.ln_create_invoice({
       amount: amount, # we create invoices in sats
-      description_hash: Digest::SHA2.hexdigest(metadata(address))
+      memo: memo,
+      description_hash: Digest::SHA2.hexdigest(metadata(address)),
     })
 
     render json: {
@@ -57,4 +68,8 @@ class LnurlpayController < ApplicationController
     amount_in_sats <= MAX_SATS && amount_in_sats >= MIN_SATS
   end
 
+  def valid_comment?(comment)
+    comment.length <= MAX_COMMENT_CHARS
+  end
+
 end

app/services/lndhub.rb

@@ -49,6 +49,7 @@ class Lndhub
   def addinvoice(payload)
     invoice = post "addinvoice", {
       amt: payload[:amount],
+      memo: payload[:memo],
       description_hash: payload[:description_hash]
     }
 

package.json

@@ -12,7 +12,7 @@
     "sass": "^1.49.7",
     "tailwindcss": "^3.0.22"
   },
-  "version": "0.2.0",
+  "version": "0.3.0",
   "scripts": {
     "build:css:sass": "sass ./app/assets/stylesheets/legacy.sass.scss ./app/assets/builds/legacy.css --no-source-map --load-path=node_modules",
     "build:css:tailwind": "tailwindcss --postcss -i ./app/assets/stylesheets/application.tailwind.css -o ./app/assets/builds/application.css",