Litecoin.watch (2026-10-21). Signing, extracting and publishing a Litecoin payment. Version: Core 0.21.5.8 · release 2026-10-21.1. https://litecoin.watch/articles/a-litecoin-wallet-can-sign-a-payment-without-sending-it Method and data: https://litecoin.watch/uploads/research/offline-payment-20261021-v1/README.txt