76 lines
1.8 KiB
Ruby
76 lines
1.8 KiB
Ruby
class LnurlpayController < ApplicationController
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before_action :find_user_by_address
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MIN_SATS = 10
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MAX_SATS = 1_000_000
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MAX_COMMENT_CHARS = 100
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def index
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render json: {
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status: "OK",
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callback: "https://accounts.kosmos.org/lnurlpay/#{@user.address}/invoice",
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tag: "payRequest",
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maxSendable: MAX_SATS * 1000, # msat
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minSendable: MIN_SATS * 1000, # msat
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metadata: metadata(@user.address),
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commentAllowed: MAX_COMMENT_CHARS
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}
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end
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def invoice
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amount = params[:amount].to_i / 1000 # msats
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address = params[:address]
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comment = params[:comment] || ""
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if !valid_amount?(amount)
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render json: { status: "ERROR", reason: "Invalid amount" }
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return
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end
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if !valid_comment?(comment)
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render json: { status: "ERROR", reason: "Comment too long" }
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return
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end
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memo = "To #{address}"
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memo = "#{memo}: \"#{comment}\"" if comment.present?
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payment_request = @user.ln_create_invoice({
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amount: amount, # we create invoices in sats
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memo: memo,
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description_hash: Digest::SHA2.hexdigest(metadata(address)),
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})
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render json: {
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status: "OK",
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successAction: {
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tag: "message",
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message: "Sats received. Thank you!"
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},
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routes: [],
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pr: payment_request
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}
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end
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private
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def find_user_by_address
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address = params[:address].split("@")
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@user = User.where(cn: address.first, ou: address.last).first
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http_status :not_found if @user.nil?
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end
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def metadata(address)
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"[[\"text/identifier\", \"#{address}\"], [\"text/plain\", \"Send sats, receive thanks.\"]]"
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end
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def valid_amount?(amount_in_sats)
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amount_in_sats <= MAX_SATS && amount_in_sats >= MIN_SATS
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end
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def valid_comment?(comment)
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comment.length <= MAX_COMMENT_CHARS
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end
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end
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