SilentPayments npm i npm t References https://github.com/bitcoin/bips/blob/1ae1b4bf80bc21911fbd90033edd8006d5e6b592/bip-0000.mediawiki https://github.com/josibake/silent-payments-workshop/blob/main/silent-payments-workshop.ipynb bitcoin/bitcoin#27827 https://medium.com/@ottosch/how-bip47-works-ee641cc14bf3