Sebastian Kippe
4c51b9c966
Allows senders to add a short message to payments, which will be stored as invoice memo by LND/LndHub.
73 lines
1.7 KiB
Ruby
73 lines
1.7 KiB
Ruby
class LnurlpayController < ApplicationController
|
|
before_action :find_user_by_address
|
|
|
|
MIN_SATS = 100
|
|
MAX_SATS = 1_000_000
|
|
MAX_COMMENT_CHARS = 100
|
|
|
|
def index
|
|
render json: {
|
|
status: "OK",
|
|
callback: "https://accounts.kosmos.org/lnurlpay/#{@user.address}/invoice",
|
|
tag: "payRequest",
|
|
maxSendable: MAX_SATS * 1000, # msat
|
|
minSendable: MIN_SATS * 1000, # msat
|
|
metadata: metadata(@user.address),
|
|
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
|
|
|
|
payment_request = @user.ln_create_invoice({
|
|
amount: amount, # we create invoices in sats
|
|
description_hash: Digest::SHA2.hexdigest(metadata(address)),
|
|
memo: comment
|
|
})
|
|
|
|
render json: {
|
|
status: "OK",
|
|
successAction: {
|
|
tag: "message",
|
|
message: "Sats received. Thank you!"
|
|
},
|
|
routes: [],
|
|
pr: payment_request
|
|
}
|
|
end
|
|
|
|
private
|
|
|
|
def find_user_by_address
|
|
address = params[:address].split("@")
|
|
@user = User.where(cn: address.first, ou: address.last).first
|
|
http_status :not_found if @user.nil?
|
|
end
|
|
|
|
def metadata(address)
|
|
"[[\"text/identifier\", \"#{address}\"], [\"text/plain\", \"Send sats, receive thanks.\"]]"
|
|
end
|
|
|
|
def valid_amount?(amount_in_sats)
|
|
amount_in_sats <= MAX_SATS && amount_in_sats >= MIN_SATS
|
|
end
|
|
|
|
def valid_comment?(comment)
|
|
comment.length <= MAX_COMMENT_CHARS
|
|
end
|
|
|
|
end
|