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ライトニングネットワーク 技術基礎と今後の見通し

Takaya Imai
February 21, 2019

ライトニングネットワーク 技術基礎と今後の見通し

ライトニングネットワーク Lightning Network

Takaya Imai

February 21, 2019
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  1. ϥΠτχϯάωοτϫʔΫ ٕज़جૅͱࠓޙͷݟ௨͠ 5BLBZB*NBJ ૑ۀऀ ୅ද$&0!'SPOUJFS1BSUOFST--$ ౦ژେֶϒϩοΫνΣʔϯΠϊϕʔγϣϯد෇ߨ࠲ &OEPXFE$IBJSGPS#MPDLDIBJO*OOPWBUJPO UIF6OJWFSTJUZPG5PLZP 

  2. ࣗݾ঺հ ϑϩϯςΟΞύʔτφʔζ߹ಉձࣾ ୅දCEO United Bitcoiners Inc. ڞಉ૑ۀऀˍऔక໾CTO ϚελϦϯάϏοτίΠϯɺ຋༁ऀ୅ද ੈքͰॳΊͯͷɺ೔ຊޠʹΑΔϏοτίΠϯɾϒϩοΫνΣʔϯͷৄࡉٕज़ॻ શମͷׂ̕Λ຋༁

    ୈ̍̎࡮ 2016/7/14ग़൛ ిࢠॻ੶൛(kindle)΋ ΦʔϓϯΤσΟγϣϯ൛ https://www.bitcoinbook.info ίϯαΠε൛ͱ߹Θͤͯ13,300෦ൃߦ
  3. ࣗݾ঺հ όοΫάϥ΢ϯυ ৽ׁେֶେֶӃɹૉཻࢠཧ࿦෺ཧɹത࢜(ཧ) ΧΧΫίϜ ݕࡧΤϯδϯ։ൃɹݕࡧαʔόΫϥελߏஙӡ༻ɹେن໛σʔλॲཧɹػցֶशɹ ը૾ೝࣝ σʔλλϫʔגࣜձࣾɹ୅දऔక໾

  4. ໨࣍ 1. ηΧϯυϨΠϠʔٕज़ʁ 2. ͳͥ͜ͷྖҬʹڵຯΛ͍࣋ͬͯΔͷ͔ʁ 3. ࠓͷঢ়گ͸ʁϏδωεͰ࢖͑Δͷ͸͍͔ͭΒʁ 4. কདྷ໘നͦ͏ͳٕज़͸ͲΜͳ΋ͷ͕͋Δʁ

  5. 1, ηΧϯυϨΠϠʔٕज़ʁ

  6. ηΧϯυϨΠϠʔٕज़ʁ ΦϑνΣʔϯٕज़ͱ΋ݺͼ·͢ɻ ϒϩοΫνΣʔϯͱؔ࿈ͤͭͭ͞΋ɺΏΔؔ͘࿈͞ ͓͖ͤͯϒϩοΫνΣʔϯͱ͸ผʹಈ͘΋ͷ ϒϩοΫνΣʔϯ ηΧϯυϨΠϠʔٕज़ ̍૚໨ ̎૚໨

  7. ϥΠτχϯάωοτϫʔΫʁ

  8. ϥΠτχϯάωοτϫʔΫʁ ηΧϯυϨΠϠʔٕज़ͷҰͭ 2015೥2݄ʹJoseph PoonͱThaddeus DryjaʹΑͬͯఏҊ͞ΕͨϏοτ ίΠϯ্ͷηΧϯυϨΠϠʔٕज़ औҾख਺ྉΛ҆͘͢Δ͜ͱͱૹۚ଎౓Λ଎͘͢Δ͜ͱΛ໨తͱ͍ͯ͠ Δ “νϟωϧ”ͱ͍͏̎ऀؒૹۚܦ࿏ʹΑΔP̎PωοτϫʔΫͰ͋Γɺෳ ਺ͷνϟωϧΛܦ༝ͯ͠ૹۚ͢Δ

    νϟωϧऔҾ૬खɺૹۚ஥հऀΛ৴༻͢Δඞཁ͕ͳ͍
  9. ϏοτίΠϯͷ εέʔϦϯά໰୊ εέʔϦϯά໰୊ ඵؒऔҾ਺͕̓݅ఔ౓ 1MB / 256byte /10෼/60ඵ = 6.8औҾຖඵ

    Segwit (Segregated Witness)༗ޮԽޙɺ̍ϒϩοΫʹ̍MBΑΓೖΔΑ͏ʹͳͬͨͨΊɺඵؒऔҾ਺ ͸લΑΓվળ ϒϩοΫνΣʔϯαΠζͷ૿େ ̎̌̌GB (2019/2/21ݱࡏ) τϥϯβΫγϣϯख਺ྉͷߴಅ ૹ෇͞ΕΔτϥϯβΫγϣϯͷ਺͕૿͑ΔͱɺϚΠφʔ͸ΑΓख਺ྉͷߴ͍τϥϯβΫγϣϯ͔Β ϒϩοΫʹऔΓࠐ΋͏ͱ͢Δ ࠷ۙ͸̍ճͷૹۚ͋ͨΓ30ԁఔ౓ 2017೥12݄͸ϐʔΫͰ̍ճͷૹۚ͋ͨΓ4000ԁఔ౓ͷͱ͖΋͋ͬͨ
  10. ඵؒऔҾ਺ 4.6tx/sec

  11. ඵؒऔҾ਺

  12. ϏοτίΠϯϒϩοΫνΣʔϯαΠζ 200GB

  13. τϥϯβΫγϣϯख਺ྉ ̍ճૹۚ͋ͨΓ4000ԁ͘Β͍

  14. τϥϯβΫγϣϯख਺ྉ https://jochen-hoenicke.de/queue/#1,1w

  15. ϏοτίΠϯͷ εέʔϦϯά໰୊ εέʔϦϯά໰୊ ඵؒऔҾ਺͕̓݅ఔ౓ 1MB / 256byte /10෼/60ඵ = 6.8औҾຖඵ

    Segwit (Segregated Witness)༗ޮԽޙɺ̍ϒϩοΫʹ̍MBΑΓೖΔΑ͏ʹͳͬͨͨΊɺඵؒऔҾ਺ ͸લΑΓվળ ϒϩοΫνΣʔϯαΠζͷ૿େ ̎̌̌GB (2019/2/21ݱࡏ) τϥϯβΫγϣϯख਺ྉͷߴಅ ૹ෇͞ΕΔτϥϯβΫγϣϯͷ਺͕૿͑ΔͱɺϚΠφʔ͸ΑΓख਺ྉͷߴ͍τϥϯβΫγϣϯ͔Β ϒϩοΫʹऔΓࠐ΋͏ͱ͢Δ ࠷ۙ͸̍ճͷૹۚ͋ͨΓ30ԁఔ౓ 2017೥12݄͸ϐʔΫͰ̍ճͷૹۚ͋ͨΓ4000ԁఔ౓ͷͱ͖΋͋ͬͨ
  16. ͍Ζ͍Ζͳղܾࡦ ΦϯνΣʔϯεέʔϦϯά औҾຖʹϒϩοΫνΣʔϯʹॻ͖ࠐΉ͜ͱΛલఏͱͯ͠ɺॲཧೳ ྗͷ૿ڧΛ͢ΔεέʔϦϯάํ๏ ΦϑνΣʔϯεέʔϦϯά ϒϩοΫνΣʔϯʹॻ͖ࠐΉճ਺ΛݮΒ͢͜ͱͰɺॲཧೳྗͷ૿ ڧΛ͢ΔεέʔϦϯάํ๏ ϒϩοΫνΣʔϯͷར఺Λ׆༻ͭͭ͠ɺϒϩοΫνΣʔϯͱ͸૬ ޓ࡞༻Λසൟʹ͠ͳ͍ॲཧ૚Λઃ͚ͯૹۚॲཧΛ࣮ߦ͢Δ

  17. ͍Ζ͍Ζͳղܾࡦ ΦϯνΣʔϯଆ ผͷϒϩοΫνΣʔϯʹॲཧΛԡ͠΍Δ αΠυνΣʔϯ/υϥΠϒνΣʔϯ τϥϯβΫγϣϯͷσʔλͷҰ෦Λผ࿮ʹԡ͠΍Δ SegWit (Segregated Witness) ϒϩοΫαΠζΛେ͖͘͢Δ ϏοάϒϩοΫ

    ϒϩοΫͷ఻ୡํ๏ͷվળɺGraphen τϥϯβΫγϣϯͷαΠζΛখ͘͢͞Δ γϡϊΞॺ໊(Schnorr Signature) ࢖Θͳ͍τϥϯβΫγϣϯεΫϦϓτΛল͘ɺ Graftroot ະ࢖༻τϥϯβΫγϣϯΞ΢τϓοτҎ֎Λ࡟আ͢Δ uTreexo MimbleWimble (grin, beam) … ΦϑνΣʔϯଆ ϥΠτχϯάωοτϫʔΫ Ethereum(ϥΠσϯωοτϫʔΫɺϚΠΫϩϥΠσ ϯ)
  18. #MPDLDIBJO DPOOFDUFEUP #JUDPJO ;DBTI #MPDLDIBJO &UIFSFVN #MPDLDIBJO #JUDPJO #MPDLDIBJO ʜ

    -JHIUOJOH/FUXPSL "UPNJD 4XBQ 1BZQBM 7JTB $SPTT#MPDLDIBJO #MPDLDIBJO DPOOFDUFEUP TPNF CMPDLDIBJOT 3BJEFO/FUXPSL ΦϯνΣʔϯଆ ΦϑνΣʔϯଆ 4JEFDIBJO ϒϩοΫνΣʔϯ֎ ֤ٕज़ͷؔ࿈Πϝʔδ *OUFSMFEHFS
  19. ϥΠτχϯάωοτϫʔΫʁ ಛ௃Λ̍ͭ̍ͭઆ໌͠·͢ɻ

  20. ϥΠτχϯάωοτϫʔΫʁ جຊతͳΞΠσΞ̍ ຖճϒϩοΫνΣʔϯʹॻ͖ࠐΉͷͰ͸ͳ͘ɺ࠷ ॳͷঢ়ଶͱ࠷ޙͷঢ়ଶ(ਖ਼ຯ)͚ͩΛॻ͖ࠐΊ͹ྑ͍ ͷͰ͸ʁ Blockchain 10000ԁ 10000ԁ 5000ԁ 15000ԁ

  21. ϥΠτχϯάωοτϫʔ Ϋʁ جຊతͳΞΠσΞ̍ ຖճऔҾΛϒϩοΫνΣʔϯʹॻ͖ࠐΉͷͰ͸ͳ͘ɺ֤औҾͷ ݁Ռͱͯ͠ਖ਼ຯͷ͓ۚΛ࠷ޙʹϒϩοΫνΣʔϯʹॻ͖ࠐΉ ͜ΕΛͰ͖ΔΑ͏ʹ͢ΔೋऀʹΑΔ࠷খߏ੒୯ҐΛνϟωϧͱ ͍͏ɻ νϟωϧ͸HTLC(Hashed Time Lock

    Contractɺϋογϡ෇͖࣌ؒ ੍ݶίϯτϥΫτ)Λ࢖ͬͯ࡞Δ ࠷ऴঢ়ଶΛϒϩοΫνΣʔϯʹॻ͖ࠐΉ·Ͱ͸ɺ྆ऀͷ߹ҙͷ ্Ͱঢ়ଶͷߋ৽Λ͢Δ
  22. ϥΠτχϯάωοτϫʔ Ϋʁ جຊతͳΞΠσΞ̍ νϟωϧΛ࡞ͬͨยํͷਓ͕ѱਓͰɺࣗ෼ͷૹۚΛͳ͔ͬͨ͜ͱʹ͍͕ͨͨ͠Ίʹɺ࠷ऴঢ়ଶͰ͸ͳ͍΋ͷΛҰํతʹϒϩο ΫνΣʔϯʹॻ͖ࠐΜͩΒͲ͏͢Δͷʁ ࠷ऴঢ়ଶͰ͸ͳ͍τϥϯβΫγϣϯʹ͸ɺѱਓଆʹର͢Δࢿۚ࢖༻੍࣌ؒݶ͕͔͔͍ͬͯ·͢ɻ ରͯ͠ɺળਓଆ͸ѱਓଆ͔Β΋ΒͬͨγʔΫϨοτΩʔΛ࠷ऴঢ়ଶͰ͸ͳ͍τϥϯβΫγϣϯʹରͯ͠࢖͏ͱɺνϟω ϧ্ʹ͋ͬͨѱਓͷࢿۚΛ௚ͪʹશͯୣ͑ΔΑ͏ʹͳ͍ͬͯ·͢ɻ γʔΫϨοτΩʔ͸࠷ऴঢ়ଶʹ྆ऀ͕߹ҙ͢Δࡍʹɺ྆ऀ͕औΓަΘ̍͢ݸલͷ΋ͷΛແޮԽ͢ΔͨΊͷΩʔ ͜ͷΑ͏ͳϖφϧςΟʔ͕͋ΔͨΊɺѱਓଆʹ͸૬खΛཪ੾ΔΠϯηϯςΟϒ͕ͳ͍

    ѱਓଆͷཪ੾Γʹର͙ͯ͢͠ʹϖφϧςΟʔΛߦ࢖Ͱ͖ΔΑ͏ʹɺτϥϯβΫγϣϯΛৗʹ؂ࢹ͓͔ͯ͠ͳ͚Ε͹͍͚ͳ͍ Blockchain
  23. ϥΠτχϯάωοτϫʔ Ϋʁ جຊతͳΞΠσΞ̍ ͜ͷνϟωϧͷ࡞ΓํΛL2 Penaltyͱݴ͍·͢ɻଞͷ νϟωϧͷ࡞Γํͱͯ͠ɺeltoo΋͋Γ·͢ɻ

  24. ϥΠτχϯάωοτϫʔ Ϋʁ جຊతͳΞΠσΞ̎ ϒϩοΫνΣʔϯ΁ͷෛՙΛԼ͛ɺख਺ྉΛ҆͘͢ΔͨΊɺνϟωϧΛෳ਺ ͭͳ͍Ͱૹۚ͢Δ

  25. ϥΠτχϯάωοτϫʔ Ϋʁ ஥հऀ͕͓ۚΛ౪ΊΔͷͰ͸ʁ ஥հऀBob͕͓ۚΛಘΔͨΊʹ͸ϓϨΠϝʔδͱݺ͹ΕΔจࣈྻ͕ͳ͍ͱ͍͚ ͳ͍ Bob͸͓ۚΛ஥հ͢Δͱ͍͏໿ଋ͸͢Δ͕ɺ໿ଋͨ࣌͠఺Ͱ͸ϓϨΠϝʔδΛ ϋογϡԽͨ͠ϓϨΠϝʔδϋογϡ͔࣋ͬͯ͠ͳ͍ͨΊɺ͓ۚΛ౪Ίͳ͍ ͜ΕΛ࣮ߦ͢ΔͨΊʹHTLCΛ࢖͏ ૹۚऀ डۚऀ

    "MJDF #PC $BSPM
  26. ؆қతͳઆ໌ ૹۚऀ डۚऀ "MJDF #PC $BSPM ᶃ৚݅෇͖ૹۚ໿ଋ ᶄ৚݅෇͖ૹۚ໿ଋ ᶅૹۚ ᶆૹۚ

  27. ϥΠτχϯάωοτϫʔ Ϋʁ ૹۚऀ डۚऀ "MJDF #PC $BSPM $BSPMϓϨΠϝʔδ 3 $BSPMϓϨΠϝʔδϋογϡ

    )
  28. ϥΠτχϯάωοτϫʔ Ϋʁ ૹۚऀ डۚऀ "MJDF #PC $BSPM $BSPM ϓϨΠϝʔδϋογϡ )

    ᶃϓϨΠϝʔδϋογϡ)ૹ෇ UYXJUI) OFFE3 UPVTF UYXJUI) OFFE3 UPVTF ᶄ59XJUI)ૹ෇ UYXJUI) OFFE3 UPVTF ᶅ59XJUI)ૹ෇ ᶆϓϨΠϝʔδ3ૹ෇ 3 ᶇϓϨΠϝʔδ3ૹ෇ 3 $BSPM ϓϨΠϝʔδ 3 ໿ଋ͸͢Δ͚Ͳ౪Ίͳ͍ Carol͸ R͕͋Δ͔Β ड͚औΕΔ
  29. ϥΠτχϯάωοτϫʔ Ϋʁ Carol͕ҙ஍ѱͰɺϓϨΠϝʔδRΛ͘Εͳ͔ͬͨΒBob͸Carolʹ͓ۚΛୣΘΕͯऴΘ Γʁ ڠྗతνϟωϧΫϩʔζʹ͢Δ৔߹ɺ૬ख͔Βࢧ෷͍தͷ΋ͷ(in-flight HTLC)ͷϓ ϨΠϝʔδRΛ΋ΒΘͳ͍ͱԠ͡ͳ͍Α͏ʹ͢Δ Carol͕ͣͬͱRΛ౉ͣ͞ҰํతʹνϟωϧΫϩʔζ͓ۚ͠Λ࢖ͬͨ৔߹ɺϓϨΠ ϝʔδR͸ύϒϦοΫϒϩοΫνΣʔϯ্Ͱެ։͞ΕΔͨΊɺͦΕΛ࢖ͬͯBob ͸Alice͔Β͓ۚΛಘΔɻͨͩ͠ɺ͕͔͔࣌ؒΔɻ

    Carol͕ͣͬͱRΛ౉ͣ͞ɺ͔͠΋͓ۚΛ࢖Θͳ͔ͬͨ৔߹ɺBob͸͋Β͔͡Ίઃ ఆ͓͍ͯͨ࣌ؒ͠Ҏ߱ʹͳΕ͹͓ۚΛऔΓ໭ͤΔ༏ઌݖ͕͋Δɻͨͩ͠ɺ͕࣌ؒ ͔͔Δɻ ૹۚऀ डۚऀ "MJDF #PC $BSPM
  30. ϥΠτχϯάωοτϫʔ Ϋʁ ϊʔυ ϊʔυ ϊʔυ*% ϊʔυ νϟωϧ ϊʔυ νϟωϧ νϟωϧ

    νϟωϧ ϊʔυ ϊʔυ*% ϊʔυ*% ϊʔυ*% ϊʔυ νϟωϧ ϊʔυ*% νϟωϧ ϊʔυ ϊʔυ*% ͷେ͖͞͸νϟωϧʹ৐͍ͬͯΔϏοτίΠϯͷྔ
  31. ٕज़ৄࡉ ٕज़ৄࡉʹ͍ͭͯ͸ͪ͜ΒΛࢀর͍ͩ͘͞(ӳޠ) 2017೥6݄ʹΠεϥΤϧͷςϧΞϏϒͰࢲ͕࿩ͨ࣌͠ ͷࢿྉ https://www.slideshare.net/takayaimai/lightning- network-in-tel-aviv-israel ࠷৽࣮૷͔Β͸গ͠ဃ཭͕͋Γ·͕͢ɺجຊతͳಈ࡞ ݪཧ͸ಉ͡Ͱ͢ɻ

  32. 2, ͳͥ͜ͷྖҬʹڵຯΛ ͍࣋ͬͯΔͷ͔ʁ

  33. ϚΠΫϩϖΠϝϯτ w ̍औҾ͋ͨΓԁະຬ w ख਺ྉະຬ w શੈքͰඵؒԯऔҾҎ্ w ݱۚ ϏοτίΠϯ

    औҾ w ύϒϦοΫ11ωοτϫʔΫ
  34. ϚΠΫϩϖΠϝϯτ vs ΫϨδοτΧʔυ w ̍औҾ͋ͨΓԁະຬ਺ඦԁҎ্ w ख਺ྉະຬҎ্ w શੈքͰඵؒԯऔҾҎ্ඵؒສऔҾҎԼ w

    ݱۚ ϏοτίΠϯ औҾϙΠϯτͳͲൃߦओମͷ %#্ͷ਺ࣈ w ύϒϦοΫ11ωοτϫʔΫൃߦओମ͕ఏڙ͢Δ αʔό
  35. ਓ͕ؒ࢖͏΋ͷʁ w ਓؒ͸൥ࡶͳ΋ͷ͕ݏ͍ͳͨΊɺҰϲ݄Ͱ·ͱΊ͓ͯࢧ෷͍͢Δɻ ܞଳձࣾͳͲɻͦͷͨΊʹऔҾ૬खͱࣄલʹܖ໿Λ݁Ϳ w ϥΠτχϯάωοτϫʔΫͰ͸औҾҰճҰճͰࢧ෷͍͕׬͍ྃͯ͠ ͘ w Ұϲ݄Ͱ·ͱΊ͓ͯࢧ෷͍͕ফ͑Δ͜ͱ͸ͳ͍͕ɺػցಉ࢜ͷԁ ະຬͷࢧ෷͍ʹ͍ͭͯ͸"*Λ௨ͯ͡উखʹ΍ΓͱΓ

    w ྫ w ࣗಈंಉ࢜ *P5 ͕উखʹ΍ΓͱΓΛͯ͠ɺઌʹߦ͖͍ͨࣗಈं ͕ɺಓΛৡͬͯ΋͍͍ࣗಈंʹ਺ԁΛ෷ͬͯɺಓΛৡͬͯ΋Β͏
  36. উखʹ(SBDPOFରஊ7PM  IUUQTHSBDPOFDPKQWPM ϥΠτχϯάωοτϫʔΫ͸ কདྷػց͕ओʹ࢖͏ͷͰ͸ʁ ਓؒ͸ػցͷಈ͖ํ͸ ࢦࣔ͢Δ΋ͷͷ ࠷దԽ͸AIଆʹ೚ͤΔ ݄͋ͨΓ5000ԁ·ͰͳΒ ࢖ͬͯྑ͍ͱ͔

  37. தԝूݖతͳ΋ͷ $FOUSBMJ[FE  WT ඇதԝूݖతͳ΋ͷ %FDFOUSBMJ[FE w কདྷతʹ͜ΕΒ͸ɺಘҙ෼໺͝ͱʹ෼͔Εͯଘࡏ͍ͯ͘͠ w $FOUSBMJ[FE

    w ϢʔβαϙʔτΛඞཁͱ͢Δ w தԝʹΑΔݫ֨ͳ؂ࢹମ੍Λඞཁͱ͢Δ w %FDFOUSBMJ[FE w །Ұͷ؅ཧओମΛඞཁͱ͠ͳ͍ w ΦʔϓϯιʔεϓϩδΣΫτ w ͲͪΒ͕͍͍͔ͱࢥ͏͔͸ਓͦΕͧΕɻࠓ·Ͱ͸΄΅தԝूݖతͳ΋ͷ͔͠ͳ͔ͬͨɻݸਓ͕উखʹબ΂Δ Α͏ʹͳΔͷ͕Α͍ঢ়ଶɻ w ൿີ伴ΛݸʑͰ؅ཧ͢Δͷ͕҉߸௨՟ͷجຊతͳߟ͑ํ w ͔͠͠ݱ࣮͸ɺ༬͔Γࢿ࢈ͷݫ֨ͳ؂ࢹମ੍͕ෑ͔Εͨɺ·ͨ͸อݥ౳͕੔උ͞ΕͨԾ૝௨՟औҾॴʹ ࢿۚΛஔ͖ɺ؅ཧΛҕୗ͍ͨ͠ਓ΋͍Δ
  38. ɾݸਓͰ 11ωοτϫʔΫΛ ௨ͯ͠ࢿۚ؅ཧ ɾ෼ࢄܕऔҾॴ Ծ૝௨՟औҾॴΛ ར༻ ඇதԝूݖత தԝूݖత ݸਓͰ 11ωοτϫʔΫΛ

    ௨ͯ͠ࢿۚ؅ཧ ʁʁʁ ηΧϯυϨΠϠʔ ϥΠτχϯάωοτϫʔΫ ϑΝʔετϨΠϠʔ ҉߸௨՟
  39. தԝूݖతͳ΋ͷ $FOUSBMJ[FE  WT ඇதԝूݖతͳ΋ͷ %FDFOUSBMJ[FE w ϥΠτχϯάωοτϫʔΫͷΑ͏ͳηΧϯυϨΠϠʔʹ͠ ͯ΋҉߸௨՟ͱಉ༷ʹɺશͯͷϊʔυ͕ର౳ͳཱ৔ʹ͋Δ ωοτϫʔΫΛ໨ࢦ͢΂͖

    w ͔͠͠ɺϥΠτχϯάεϚϗΞϓϦ༻ͷऔҾ؂ࢹͳͲதԝ ूݖతͳ΋ͷ͕͋Δఔ౓ࠞ͡Δͷ͸࢓ํ͕ͳ͍͠ɺ͕͜͜ ·ͩ͜ͷੈքʹଘࡏ͠ͳ͍࣍ͷऩӹݯʹͳΔՄೳੑ͕͋Δ w ͨͩ͠ɺதԝूݖతͳ΋ͷͱඇதԝूݖతͳ΋ͷΛݸਓ͕ બ΂Δͱ͍͏ͷ͕ॏཁ
  40. ϕʔγοΫΠϯΧϜʁ w ݸਓࢿຊओٛ΁Ҡߦ w ࢿຊओٛࣗ෼͕͍࣋ͬͯΔٕज़·ͨ͸౔஍ͳͲΛجʹ͓ͯۚ͠ΛՔ͍ Ͱ΋Α͍ͱ͢Δߟ͑ํ ʮαϐΤϯεશ࢙ʯΑΓ  w Χʔετ੍౓ͷΑ͏ͳ৬ۀݻఆͱͷରൺ

    w ࠓ·Ͱେ͖ͳࢿۚΛ࣋ͪ޻৔Λ࣋ͯΔऀ͚͕ͩػցʹΑΔརӹੜΈग़͕͠ Ͱ͖ͨ w Ϋϥ΢υαʔϏεɺϋʔυ΢ΣΞ BSEVJOPͳͲ ͕҆Ձʹͳ͖ͬͯͨத Ͱɺࠓ·ͰͷΑ͏ʹେ͖ͳࢿۚΛ࣋ͭऀ͚͕ͩػցʹΑΔརӹੜΈग़͕͠ Ͱ͖Δͱ͍͏ͷ͸มΘ͍ͬͯ͘ͷͰ͸ͳ͍͔ w ϕʔγοΫΠϯΧϜͷΑ͏ʹɺϚΠχϯάͰͷίϯηϯαεߏ੒ߩݙɺϥΠ τχϯάωοτϫʔΫͷߏ੒ߩݙɺτʔΫϯΤίϊϛʔͳͲʹΑͬͯɺݸਓ ͷऩೖݯ͕ଟ༷Խ͍ͯ͘͠ͷͰ͸ͳ͍͔
  41. 3, ࠓͷঢ়گ͸ʁϏδωεͰ ࢖͑Δͷ͸͍͔ͭΒʁ

  42. ϥΠτχϯάωοτϫʔΫ ϊʔυϓϩδΣΫτҰཡ $PNQBOZ 0SHBOJ[BUJP O -JHIUOJOH -BCT .*5%$* #MPDLTUSFB N

    "$*/2 CDPJOPSH /BZVUB #JUGVSZ 1SPEVDU /BNF MOE MJU MJHIUOJOHE FDMBJS QMBTNB QUBSNJHBO MQE MOXBMMFU #MVFXBMMFU $PNNJUPST 0MBPMVXB 0TVOUPLVO  $POOFS 'SPNLOFDIU 5IBEEFVT %SZKB  7BSVOSBN (BOFTI 3VTUZ 3VTTFM  $ISJTUJBO %FDLFS 1JFSSF.BSJF 1BEJPV  'BCSJDF %SPVJO  EQBE $ISJTUPQIFS +F⒎SFZ OBZVUBVFOP  OBZVUB HPOEP 7MBEJTMBW .FMOJL NLM  &WHFOJZ 4DIFSCJOB "OUPO ,VNBJHPSPE TLJ *HPS ,PSTBLPW  -BOHVBHF (P (P $ 4DBMB /PEFKT $ 3VTU 4DBMB /PEFKT pSTUDPNNJU +45          NBTUFS MBTUFTU DPNNJU +45          HJUIVC IUUQT HJUIVCDPN MJHIUOJOHOFU XPSLMOE IUUQT HJUIVCDPN NJUEDJMJU IUUQT HJUIVCDPN &MFNFOUT1SP KFDU IUUQT HJUIVCDPN "$*/2FDMBJS IUUQT HJUIVCDPN CDPJOPSH QMBTNB IUUQT HJUIVCDPN OBZVUBDP QUBSNJHBO IUUQT HJUIVCDPN -JHIUOJOH1FB DIMQE IUUQT HJUIVCDPN CUDPOUSBDU MOXBMMFU IUUQT HJUIVCDPN #MVF8BMMFU #MVF8BMMFU PUIFST BOESPJEBQQ "OESPJE J04
  43. None
  44. None
  45. None
  46. https://twitter.com/LNstats/status/1097366414825013248

  47. ֊૚ߏ଄ରԠؔ܎ Blockchains Lightning Payment Channel Routing Algorithm Atomic Multi-Path Payments

    ??? ෺ཧ૚ ϦϯΫ૚ ωοτϫʔΫ૚ τϥϯεϙʔτ૚ ΞϓϦέʔγϣϯ૚ Sphinx ϓϨθϯςʔγϣϯ૚ ϥΠτχϯά Πϯλʔωοτ HTLC ηογϣϯ૚
  48. ֊૚ߏ଄ରԠؔ܎ OSIࢀরϞσϧͱΠϯλʔωοτͷߏ଄Λͦͷ··ରൺ͸Ͱ͖ ͳ͍΋ͷͷɺΞϓϦέʔγϣϯϨΠϠʔ෦෼͕·ͩ଍Γͳ͍ɻ ͜͜͸Լͷ֊૚ͷৄࡉΛ஌Βͳͯ͘΋ɺαΫοͱϥΠτχϯά ωοτϫʔΫΛ࢖͑ΔΑ͏ʹ͢Δϓϩτίϧ͕དྷΔɻ ݸʑͷ֊૚͸ɺҰࣾಠ઎Ͱ͸ͳ͘ݸʑ͕όϥόϥʹಈ͘ͷ͕๬ ·͍͠ɻͱ͍͏ͷ͸ɺ૊Έ߹Θͤͷ࢓ํ͕ࣗ༝ʹͳΓԠ༻ൣғ ͕രൃతʹ޿͘ͳΔ͔ΒɻҰ͚ࣾͩͩͱͦͷձࣾͷརӹʹҾͬ ுΒΕͯരൃతʹ࢖ΘΕΔΑ͏ʹͳΒͳ͍ɻ

  49. ϥΠτχϯά੟ՐϦϨʔ https://www.takethetorch.online/Torch

  50. ϥΠτχϯά੟ՐϦϨʔ 2019/01/20͔Β࢝·ͬͨ੟ՐϦϨʔ ϥΠτχϯάωοτϫʔΫͷೝ஌޲্ͱɺ̍ճ͋ͨΓૹۚՄೳֹͷٕज़త޲ ্Λ໨తͱͨ͠΋ͷ 10ສsatoshi͔Β࢝·ͬͯɺड͚औͬͨਓ͸1ສsatoshi(40ԁ͘Β͍)Λ௥Ճͯ͠ ࣍ͷਓʹૹۚ͢Δ(੟ՐΛ౉͢) 439ສsatoshi(17000ԁ͘Β͍)͕ΰʔϧͰɺ͜ͷ͓ۚ͸ϕωζΤϥʹد෇͞ΕΔ ̍ສԁ͸αΫαΫͱϥΠτχϯάωοτϫʔΫ্Λಈ͘·Ͱʹٕज़ɺωοτ ϫʔΫ͕੒௕

  51. ϥΠτχϯά੟ՐϦϨʔ

  52. ࠓޙͷൃల 2019೥ʹೖͬͯ࢖͍΍͍͢ϥΠτχϯά΢ΥϨοτ͕୆಄͖͍ͯͯ͠Δɻ ͜Ε͸ΦϯϥΠϯ΢ΥϨοτͰɺαʔόʹൿີ伴Λஔ͍͓ͯ͘΢ΥϨο τɻ͜ͷͨΊɺΦϯϥΠϯ΢ΥϨοτʹ͋Δ͓ۚ͸؆୯ʹӡӦऀʹ౪· ΕΔՄೳੑ͕͋Δɻ ϢʔβϏϦςΟΛߟ͑ͨ࣌ͷա౉తͳ΋ͷͱͯ͠͸ΞϦͰ͸͋Δɻ ϥΠτχϯά΢ΥϨοτ͕࢖͍΍͘͢ͳΔͱɺͦΕͱඥ෇͚ͨαʔϏε͕ ొ৔͠΍͘͢ͳΔ ͦΕͳΓͷϏδωεن໛ʹͳΔαʔϏε͸2020೥ʹొ৔͔ʁʁ

  53. 4, কདྷ໘നͦ͏ͳٕज़ʹ͸ ͲΜͳ΋ͷ͕͋Δʁ

  54. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़΍ϓϩδΣΫτ Atomic Multi-Path Payments(ෆՄ෼ͳෳ਺ܦ࿏ࢧ෷͍ɺϥΠτχϯάωοτϫʔΫඇதԝूݖԽ/ଟֹૹۚ) eltoo(νϟωϧߋ৽ͷγϯϓϧԽ) Splicing(νϟωϧσϙδοτͷಈతมߋ) Outsourcing WatchTower (τϥϯβΫγϣϯ؂ࢹͷ֎෦Խ/ҕୗ)

    Olympus Server(νϟωϧঢ়ଶͷόοΫΞοϓ෼ࢄҕୗͱҕ೚ΠϯηϯςΟϒઃܭɺϖΠϝϯτϧʔτҕୗ) Atomic Swap(ϥΠτχϯάΛ࢖ͬͨϒϩοΫνΣʔϯؒෆՄ෼ίΠϯަ׵) Streaming Payments (ϥΠτχϯάૹۚͷ͞ΒͳΔޮ཰ԽɺૹۚϧʔτҰճҰճดͣ͡ʹϧʔτΛ࢖͍ճ͢) xCrow Protocol (ΦϑνΣʔϯٕज़Λ༻͍ͨDEX(ඇதԝूݖతऔҾॴ)ߏ੒ٕज़) ੥ٻॻͳ͠ͷϥΠτχϯάϖΠ spontaneous payments without invoice
  55. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̍

  56. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̍ AMP: Atomic Multi-Path Payments(ෆՄ෼ͳෳ਺ܦ࿏ࢧ෷͍) ݱঢ় ૹۚऀ͔Βडۚऀ΁ͷૹۚܦ࿏͸̍ͭ ྫ͑͹ɺ100ԁΛૹΓ͍ͨ৔߹ɺૹۚऀ͔Βडۚऀ΁ͷܦ࿏ͷશͯͷνϟωϧ͕100ԁૹۚՄೳͰͳ͍ͱ ͍͚ͳ͍

    ໰୊఺ ·ͱ·͓ͬͨۚΛૹΕͳ͍ ̍ສԁͳͲ͋Δఔ౓·ͱ·͓ͬͨۚ͸ɺϥΠτχϯάωοτϫʔΫΛ࢖Θͳ͍΄͏͕͍͍ͱ͸ࢥ͍ ·͢ νϟωϧʹଟ͘ͷ͓ۚΛஔ͍͓ͯ͘ͷ͸ࢿ͕ۚ๛͔ͳਓ -> தԝूݖԽ 1ͭͷૹۚܦ࿏ʹґଘͯ͠͠·͏ ૹۚܦ࿏্ͷϊʔυ͕ૹۚதʹ൓Ԡ͠ͳ͘ͳΔͳͲ໰୊͕ى͖ͨ৔߹ɺૹ్͕ۚதͰࢭ·ͬͯ͠ ·ͬͯಈ͔ͳ͘ͳΔͱ͍͏͜ͱ͸ͳ͍͕ɺૹۚ׬ྃ·Ͱ͕͔͔࣌ؒͬͯ͠·͏
  57. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̍ AMP: Atomic Multi-Path Payments(ෆՄ෼ͳෳ਺ܦ࿏ࢧ෷͍) ղܾํ๏ ̍ճͷૹۚΛɺෳ਺ͷૹۚܦ࿏ʹ෼ׂͯ͠ૹΔ ྑ͍఺ ૹۚܦ࿏ͷબ୒ࢶ͕΋ͬͱ૿͑ɺϥΠχϯάωοτϫʔΫશମͷϦιʔεΛ͏·͘࢖͑Δ

    νϟωϧʹେ͖ͳ͓ۚΛஔ͍͓͔ͯͳͯ͘΋ɺϥΠτχϯάωοτϫʔΫʹߩݙͰ͖Δ ѱ͍఺ ϥΠτχϯάωοτϫʔΫશମͰͷૹۚॲཧ਺͸૿͑ΔͨΊɺ෼ׂ਺Λେ͖͗͘͢͠ΔͱϥΠτ χϯάωοτϫʔΫ͕๞࿨ͯ͠͠·͏
  58. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̍ AMP: Atomic Multi-Path Payments(ෆՄ෼ͳෳ਺ܦ࿏ࢧ෷͍) ਐల۩߹ ΞτϛοΫੑͷఆٛ΍࠷దͳ࣮૷ํ๏ʹ͍ͭͯɺlightning-devϝʔϦϯάϦετͰٞ࿦த ·ͩϥΠτχϯάωοτϫʔΫRFCʹ͸ͳ͍ͬͯͳ͍ ͜Ε͸ɺݸਓతʹScaling

    Bitcoin Workshop 2017 @ Stanford Univ. ʹఏҊ͍ͯͨ͠΋ͷ(࢒೦ͳ͕ΒτʔΫ ʹ͸࠾༻͞Ε·ͤΜͰ͕ͨ͠ɻɻ) https://github.com/takaya-imai/packetization_for_paymentchannel
  59. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̎ eltoo: ߋ৽ํ๏ͷ͞ΒͳΔγϯϓϧԽ

  60. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̏ Splicing (Splice-in, Splice-out) νϟωϧσϙδοτͷಈతมߋ Splice-in: σϙδοτΛ૿΍͢ Splice-out: σϙδοτΛݮΒ͢

    Funding TX Commitment TX ௨ৗ Funding TX Commitment TX2 Splicing Funding TX2
  61. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̐ Outsourcing WatchTower τϥϯβΫγϣϯ؂ࢹͷ֎෦Խ/ҕୗ νϟωϧΛҡ࣋͢Δʹ͋ͨͬͯɺνϟωϧ૬ख͕ෆਖ਼Λ͠ͳ͍Α͏ʹνϟωϧ͕ উखʹด͡ΒΕͳ͍͔Λ؂ࢹ͠ͳ͍ͱ͍͚ͳ͍ εϚϗ্ͷϥΠτχϯάΞϓϦͷ৔߹ɺεϚϗ͕յΕΔ·ͨ͸ి஑͕੾ΕΔͱ ͍ͬͨ৔߹ʹ͜ͷτϥϯβΫγϣϯ؂ࢹ͕Ͱ͖ͳ͘ͳΔͨΊɺ؂ࢹͷ֎෦Խ/ҕ ୗ͕ඞཁʹͳΔ

    ಛʹɺडۚͷࡍʹ͜ͷτϥϯβΫγϣϯ؂ࢹ͕ॏཁɻݱࡏ΄ͱΜͲͷϥΠτχϯ άΞϓϦͰૹۚͷΈ͔͠Ͱ͖ͳ͍ͷ͸ɺૹۚʹτϥϯβΫγϣϯ؂ࢹ͕ෆཁͳͨ Ίɻ
  62. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̑ Olympus Server νϟωϧঢ়ଶόοΫΞοϓͷ෼ࢄҕ೚ͱҕ೚ΠϯηϯςΟϒઃܭҕୗɺϖΠϝϯτϧʔτҕୗ http://lightning-wallet.com/what-does-olympus-server-do#what-does-olympus-server-do νϟωϧΛ։͘ͱOlympus Serverʹνϟωϧঢ়ଶΛ҉߸Խͨ͠ঢ়ଶͰૹ෇͠όοΫΞοϓख਺ྉΛ΋Β͏ Olympus Server͕ཪ੾ΔՄೳੑ(νϟωϧঢ়ଶΛ໭ͯ͘͠Εͳ͍)͕͋ΔͨΊɺෳ਺ͷOlympus

    Serverʹνϟ ωϧঢ়ଶΛૹΔ෼ࢄҕୗͷํ͕ྑ͍Α͏ʹࢥ͏ ϞόΠϧ΢ΥϨοτ༻ʹɺকདྷతʹϖΠϝϯτϧʔτ෼ࢄҕୗͰ͖Δͱྑ͍
  63. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̒ Atomic Swaps ϥΠτχϯάΛ࢖ͬͨϒϩοΫνΣʔϯؒෆՄ෼ίΠϯަ׵

  64. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̒ Atomic Swaps ϥΠτχϯάΛ࢖ͬͨϒϩοΫνΣʔϯؒίΠϯަ׵ ϊʔυA ϊʔυB ϊʔυA BTCνϟωϧ ETHνϟωϧ

    ϊʔυB͸ɺBTCͱETH྆ํΛ ࣋ͨͳ͍ͱ͍͚ͳ͍
  65. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̓ Streaming Payments ϥΠτχϯάૹۚͷ͞ΒͳΔޮ཰ԽɺૹۚϧʔτҰճҰճดͣ͡ʹ ϧʔτΛ࢖͍ճ͢ ͜͜Λ஗Ԇͤ͞Δ͜ͱͰ ϓϨΠϝʔδϋογϡΛ࢖͍·Θ͠ TX with

    HͷૹֹۚΛ Կ౓΋ॻ͖׵͑Δ
  66. ஫໨͍ͯ͠Δ ϥΠτχϯάٕज़̔ ੥ٻॻͳ͠ͷϥΠτχϯάϖΠ ड͚औΓଆ͕੥ٻॻΛૹΒͳͯ͘΋ɺࢧ෷͍͕Ͱ͖Δ

  67. ϥΠτχϯάʹڵຯ͕͋Δํ͸͝ࢀՃ͍ͩ͘͞ɻ

  68. ݸਓϦϑΝϨϯε w աڈϓϨθϯࢿྉ w IUUQTXXXTMJEFTIBSFOFUMBXNOQSFTFOUBUJPOT w IUUQTXXXTMJEFTIBSFOFUUBLBZBJNBJ QSFTFOUBUJPOT w IUUQTTQFBLFSEFDLDPNUBLBZBJNBJ

    w -JOLFEJO w IUUQTXXXMJOLFEJODPNJOUBLBZBJNBJB
  69. fin.