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invoices: multi-crypto payment support
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One asset per invoice from a registry (lib/crypto_asset.rb): BTC, LTC,
ETH, XMR, SOL, ALGO, USDT/USDC on ERC-20/TRC-20/BEP-20/Solana/Algorand.
Migration 003 generalizes the ltc_* columns to crypto_* + crypto_coin
(existing LTC invoices backfilled). QR payload adapts per asset: BIP21
amount URIs where supported, bare address for tokens with a network
hint on the PDF. Default addresses come from the CRYPTO_ADDRESSES
secret (JSON code=>address); LTC_ADDRESS still works as legacy.
This commit is contained in:
Sergei Poljanski 2026-07-03 02:01:57 +04:00
commit 0fbb6ee809
Signed by: asxpi
GPG key ID: 4F8851660FA4121B
20 changed files with 410 additions and 143 deletions
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33
lib/invoice_pdf.rb
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@ -3,6 +3,8 @@ require 'prawn/table'
require 'bigdecimal'
require 'stringio'
require_relative 'fmt'
require_relative 'crypto_asset'
require_relative 'crypto_qr'
class InvoicePdf
FONTS_DIR = File.join($root, 'public', 'fonts')
@ -246,7 +248,7 @@ class InvoicePdf
pdf.text "Beneficiary: #{ISSUER[:name_latin]}"
end
draw_ltc(pdf) if @invoice.respond_to?(:ltc?) && @invoice.ltc?
draw_crypto(pdf) if @invoice.respond_to?(:crypto?) && @invoice.crypto?
unless @invoice.notes.to_s.strip.empty?
pdf.move_down 14
@ -258,20 +260,22 @@ class InvoicePdf
end
end
def draw_ltc(pdf)
amount = @invoice.ltc_amount_due
def draw_crypto(pdf)
coin = @invoice.crypto_coin
asset = CryptoAsset[coin] || {}
amount = @invoice.crypto_amount_due
qr_size = 78
pdf.move_down 12
pdf.fill_color COLOR_MUTED
pdf.font_size(8) { pdf.text 'PAY IN LITECOIN (LTC)', character_spacing: 1.5 }
pdf.font_size(8) { pdf.text "PAY IN #{CryptoAsset.name(coin).upcase} (#{coin})", character_spacing: 1.5 }
pdf.fill_color COLOR_TEXT
pdf.move_down 4
# Fixed-height row: QR on the right (drawn with float so it doesn't advance
# the cursor), text column on the left. The outer bounding_box of height
# qr_size leaves the cursor exactly below the row when it ends.
qr_bytes = LtcQr.png(@invoice.ltc_address, amount)
qr_bytes = CryptoQr.png(coin, @invoice.crypto_address, amount)
pdf.bounding_box([0, pdf.cursor], width: pdf.bounds.width, height: qr_size) do
pdf.float do
pdf.bounding_box([pdf.bounds.right - qr_size, pdf.bounds.top], width: qr_size, height: qr_size) do
@ -282,19 +286,24 @@ class InvoicePdf
pdf.bounding_box([0, pdf.bounds.top], width: pdf.bounds.width - qr_size - 16) do
pdf.font_size(9) do
if amount
pdf.text "Amount: #{fmt_ltc(amount)} LTC", style: :bold
if @invoice.ltc_rate
pdf.text "Amount: #{fmt_crypto(amount)} #{coin}", style: :bold
if @invoice.crypto_rate
pdf.fill_color COLOR_MUTED
pdf.text "(rate 1 LTC = #{fmt_rate(@invoice.ltc_rate)} #{@invoice.currency} at issue)", size: 8
pdf.text "(rate 1 #{coin} = #{fmt_rate(@invoice.crypto_rate)} #{@invoice.currency} at issue)", size: 8
pdf.fill_color COLOR_TEXT
end
pdf.move_down 3
end
pdf.text 'Address:'
pdf.font_size(8) { pdf.text @invoice.ltc_address }
pdf.font_size(8) { pdf.text @invoice.crypto_address }
pdf.move_down 3
pdf.fill_color COLOR_MUTED
pdf.font_size(7) { pdf.text 'Scan the QR with any Litecoin wallet to prefill the payment.' }
hint = if asset[:amount_param]
"Scan the QR with any #{CryptoAsset.name(coin)} wallet to prefill the payment."
else
"QR encodes the address. Send #{coin} only — verify the network before sending."
end
pdf.font_size(7) { pdf.text hint }
pdf.fill_color COLOR_TEXT
end
end
@ -333,8 +342,8 @@ class InvoicePdf
BigDecimal(value.to_s).round(2).to_s('F').then { |s| with_thousands(s) }
end
def fmt_ltc(value)
Fmt.ltc(value)
def fmt_crypto(value)
Fmt.crypto(value)
end
def fmt_rate(value, min_dp: 4)