Sergei Poljanski
33ba7650c3
Crypto options were limited to a hard-coded asset list, with one address per coin in a side table. A payout address now carries everything an invoice needs: ticker, name, QR URI scheme, amount parameter, CoinGecko id, address and an active flag. Any coin can be added, several addresses per ticker are fine, and known tickers fill the QR and rate fields from the built-in templates. The new-invoice form picks a payout address. The invoice snapshots the ticker, address, name, scheme and amount parameter, and the PDF and QR render from that copy, so editing, retiring or deleting a payout entry never changes an issued invoice. "Fetch live" looks up the rate by the payout address's CoinGecko id. Migration 012 keeps the existing rows and backfills both the payout metadata and the snapshots on existing crypto invoices. Assisted-by: Claude:opus-5
32 lines
1 KiB
Ruby
32 lines
1 KiB
Ruby
require 'rqrcode'
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require_relative 'crypto_asset'
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# Renders a crypto payment QR as PNG bytes for embedding in the PDF.
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# The payload follows the payout entry's scheme/amount parameter: a payment
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# URI with amount, a bare scheme URI, or just the address.
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module CryptoQr
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module_function
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# `amount` is a BigDecimal or nil (address-only QR).
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def uri(scheme:, amount_param:, address:, amount:)
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return address unless scheme
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base = "#{scheme}:#{address}"
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return base if amount.nil? || amount_param.nil?
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# Trim trailing zeros so the wallet shows a clean amount; keep up to 8 dp.
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amt = amount.round(8).to_s('F').sub(/\.?0+$/, '')
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"#{base}?#{amount_param}=#{amt}"
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end
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# Returns PNG bytes (binary string), sized for a crisp ~120pt PDF placement.
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def png(size: 480, **payload)
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qr = RQRCode::QRCode.new(uri(**payload), level: :m)
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qr.as_png(
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bit_depth: 1,
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border_modules: 2,
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color: 'black',
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fill: 'white',
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module_px_size: 6,
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resize_exactly_to: size
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).to_s
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end
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end
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