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. |
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