Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Lightning Network Watchtower
Search
yohei okada
May 20, 2018
1
1.4k
Lightning Network Watchtower
blockchain.tokyo #8のLT発表資料
yohei okada
May 20, 2018
Tweet
Share
More Decks by yohei okada
See All by yohei okada
メルカリアッテのRxSwift実装ガイド
parakeety
10
5.5k
Featured
See All Featured
[RailsConf 2023] Rails as a piece of cake
palkan
55
5.6k
Making Projects Easy
brettharned
116
6.3k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
The Art of Programming - Codeland 2020
erikaheidi
54
13k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
181
53k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
161
15k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
10
940
Building an army of robots
kneath
306
45k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
107
19k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
233
17k
GraphQLとの向き合い方2022年版
quramy
49
14k
Transcript
Lightning Network Watchtower blockchain.tokyo #8 @parakeety
ࣗݾհ • Ԭా༸ฏ • github: parakeety • twitter: @parakeety_ •
ڵຯؔ৺: Lightning Network, DEX, mimblewimble
Lightning Network͓͞Β͍ • Bitcoin networkͱ࿈ܞ͢Δ͏Ұͭͷp2p network • opening txͱclosing txBitcoin
networkʹbroadcast͞ Εॻ͖ࠐ·ΕΔ͕ɺ్தͷcommitment txbroadcast ͤͣʹͻͨ͢Βߋ৽͢Δ • commitment txॺ໊ࡁΈͰ͍ͭͰBitcoin network ʹ͍ͭͰbroadcastͯ֬͠ఆͤ͞Δࣄ͕Ͱ͖Δ
0QFOJOH5SBOTBDUJPO $MPTJOH5SBOTBDUJPO $PNNJUNFOU5SBOTBDUJPO $PNNJUNFOU5SBOTBDUJPO ΞυϨεA: 5BTC ΞυϨεB: 5BTC
ΞυϨεA: 4BTC ΞυϨεB: 6BTC ΞυϨεA͔ΒΞυϨεBʹ1BTCૹۚ ΞυϨεAͷॴ༗ऀCommitment Transaction(1)Λbroadcast͢Δincentive͕͋Δ
ݹ͍ෆਖ਼ͳCommitment TxΛbroadcastͨ͠߹ • ҰఆظؒҎʹɺऔΓ͢tx(justice tx)Λ࡞ͯ͠ broadcast͢Εɺopening txͷdepositΛશͯճऩ͢ Δࣄ͕Ͱ͖Δ
ෆਖ਼ͳCommitment txճऩͷ՝ • ݹ͍ෆਖ਼ͳcommitment tx͕broadcast͞Ε͔ͯΒɺҰ ఆظؒҎʹjustice txΛ࡞ͯ͠ɺbroadcast͠ͳ͍ͱ ͍͚ͳ͍ • ͭ·ΓɺBitcoin
networkΛࢹ͢Δඞཁ͕͋Δ • ৗ࣌ىಈ͍ͯ͠Δfull nodeͰ͋ΕՄೳ͕ͩɺϞόΠϧ ͩͱݫ͍͠
Watchtower
Watchtower • ϞόΠϧͳͲͷৗ࣌ىಈ͕͍ܰ͠ྔΫϥΠΞϯτ ͷΘΓʹɺBitcoin NetworkΛࢹ • ݹ͍Commitment tx͕broadcast͞ΕͨͷΛݕ͠ɺ justice txΛbroadcastͯ͘͠ΕΔ
• LightningͷϑϧϊʔυͷҰػೳͱ࣮ͯ͠༧ఆ
WatchtowerͷΈ • ܰྔΫϥΠΞϯτɺCommitment txΛߋ৽͢Δ ʹɺjustice txΛ࡞͠ɺWatchtowerʹૹΔ • ͋ͱWatchtower͕ࣗಈͰճऩͯ͘͠ΕΔ • 1ͭͷWatchtowerͰͳͯ͘ɺෳͷWatchtowerʹ
outsource͢Δ
WatchtowerͷΠϯηϯςΟϒ • ܰྔΫϥΠΞϯτͷΘΓʹෆਖ਼ͳCommitment txΛ ৗ࣌ࢹͯ͠Β͏ࣄʹରͯ͠ରՁΛ͏ࣄ͕ఆ͞Ε ͯΔ • Retribution: ճऩֹͨۚ͠ͷҰ෦ΛWatchtowerʹࢧ ͏
• Pay-per-state: Commitment txΛߋ৽͠ɺjustice txΛૹ ΔʹใुΛࢧ͏
·ͱΊ • ϞόΠϧͷৗ࣌ىಈ͕͍͠ΫϥΠΞϯτͰ҆৺ ͯ͠Lightning NetworkΛ͑ΔΑ͏ʹͳΔʹɺ Watchtower͕ඞཁ