{"type":"rich","version":"1.0","author_name":"npub1r375vdaydp5nnnytff6ee2kwzxak8whmwkmnkm6h67agr7dadfkqxn6ccq","author_url":"https://nostr.ae/npub1r375vdaydp5nnnytff6ee2kwzxak8whmwkmnkm6h67agr7dadfkqxn6ccq","provider_name":"njump","provider_url":"https://nostr.ae","html":"📅 Original date posted:2017-12-27\n📝 Original message:\nAndy Schroder\n\nOn 12/27/2017 12:18 AM, Andy Schroder wrote:\n\u003e\u003e Channel closing\n\u003e\u003e costs dwarf the gains to be made from cheating, however.\n\u003e\u003e\n\u003e\u003e\u003e Since millisatoshis is used, is there a maximum channel funding size?\n\u003e\u003e Yes, the upper 32 bits must be zero, from BOLT #2:\n\u003e\u003e\n\u003e\u003e    - for channels with `chain_hash` identifying the Bitcoin blockchain:\n\u003e\u003e      - MUST set the four most significant bytes of `amount_msat` to 0.\n\u003e\u003e\n\u003e\u003e This gives a maximum HTLC value of .04294967295 BTC, which, back when\n\u003e\u003e we started, was about $10.\n\u003e\n\u003e What's the point of wasting the upper 32 bits? Seems like this is a \n\u003e waste of data?\n\u003e\n\u003e If you have the lower 32 bits of data to use, and 2^32=4,294,967,296, \n\u003e then you have 4,294,967,296 milli satoshis. 1 BTC=10^11 milli \n\u003e satoshis, so 4,294,967,296 milli satoshis/((10^11 milli \n\u003e satoshis)/1BTC) = 0.04294967296 BTC. That is off by 1 milli satoshi \n\u003e from what you say above. Why is this?\n\u003e\n\u003e Regardless of the discrepancy of 1 milli satoshi, it still seems like \n\u003e 0.04294967296 BTC is kind of a low maximum channel size for a lot of \n\u003e business applications. Why do you want to limit this when you have \n\u003e those extra 4 bytes set to zero? You think any more is too much to \n\u003e safely have in a hot wallet? You felt keeping it low will encourage \n\u003e decentralization? Something else?\n\u003e\n\u003e\n\u003e Is the max HTLC value the same as the maximum channel size? \n\nOkay, so I may have discovered part of this answer to this question in \nBOLT 2 where it says: \"MUST set |funding_satoshis| to less than 2^24 \nsatoshi\". However, I still don't understand the rational of why |max \n||funding_satoshis doesn't equal max |amount_msat, or where the values \nof (2^24)*10^3 and 2^32 milli satoshis came from. Also, why don't you \nuse units of millisatoshis everywhere in the spec? Sometimes it's \nsatoshis and sometimes it's milli satoshis.\n\n-------------- next part --------------\nAn HTML attachment was scrubbed...\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/lightning-dev/attachments/20171227/f270ce79/attachment.html\u003e"}