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

Transcript

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

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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
   

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3. ࣗݾ঺հ
   όοΫάϥ΢ϯυ
   ৽ׁେֶେֶӃɹૉཻࢠཧ࿦෺ཧɹത࢜(ཧ)
   ΧΧΫίϜ
   ݕࡧΤϯδϯ։ൃɹݕࡧαʔόΫϥελߏஙӡ༻ɹେن໛σʔλॲཧɹػցֶशɹ
   ը૾ೝࣝ
   σʔλλϫʔגࣜձࣾɹ୅දऔక໾
   

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

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5. 1, ηΧϯυϨΠϠʔٕज़ʁ
   

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

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7. ϥΠτχϯάωοτϫʔΫʁ
   

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8. ϥΠτχϯάωοτϫʔΫʁ
   ηΧϯυϨΠϠʔٕज़ͷҰͭ
   2015೥2݄ʹJoseph PoonͱThaddeus DryjaʹΑͬͯఏҊ͞ΕͨϏοτ
   ίΠϯ্ͷηΧϯυϨΠϠʔٕज़
   औҾख਺ྉΛ҆͘͢Δ͜ͱͱૹۚ଎౓Λ଎͘͢Δ͜ͱΛ໨తͱ͍ͯ͠
   Δ
   “νϟωϧ”ͱ͍͏̎ऀؒૹۚܦ࿏ʹΑΔP̎PωοτϫʔΫͰ͋Γɺෳ
   ਺ͷνϟωϧΛܦ༝ͯ͠ૹۚ͢Δ
   νϟωϧऔҾ૬खɺૹۚ஥հऀΛ৴༻͢Δඞཁ͕ͳ͍
   

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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΋͋ͬͨ
   

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10. ඵؒऔҾ਺
    4.6tx/sec
    

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11. ඵؒऔҾ਺
    

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12. ϏοτίΠϯϒϩοΫνΣʔϯαΠζ
    200GB
    

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13. τϥϯβΫγϣϯख਺ྉ
    ̍ճૹۚ͋ͨΓ4000ԁ͘Β͍
    

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

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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΋͋ͬͨ
    

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16. ͍Ζ͍Ζͳղܾࡦ
    ΦϯνΣʔϯεέʔϦϯά
    औҾຖʹϒϩοΫνΣʔϯʹॻ͖ࠐΉ͜ͱΛલఏͱͯ͠ɺॲཧೳ
    ྗͷ૿ڧΛ͢ΔεέʔϦϯάํ๏
    ΦϑνΣʔϯεέʔϦϯά
    ϒϩοΫνΣʔϯʹॻ͖ࠐΉճ਺ΛݮΒ͢͜ͱͰɺॲཧೳྗͷ૿
    ڧΛ͢ΔεέʔϦϯάํ๏
    ϒϩοΫνΣʔϯͷར఺Λ׆༻ͭͭ͠ɺϒϩοΫνΣʔϯͱ͸૬
    ޓ࡞༻Λසൟʹ͠ͳ͍ॲཧ૚Λઃ͚ͯૹۚॲཧΛ࣮ߦ͢Δ
    

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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)
    

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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
    

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19. ϥΠτχϯάωοτϫʔΫʁ
    ಛ௃Λ̍ͭ̍ͭઆ໌͠·͢ɻ
    

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

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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
    

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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
    

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23. ϥΠτχϯάωοτϫʔ
    Ϋʁ
    جຊతͳΞΠσΞ̍
    ͜ͷνϟωϧͷ࡞ΓํΛL2 Penaltyͱݴ͍·͢ɻଞͷ
    νϟωϧͷ࡞Γํͱͯ͠ɺeltoo΋͋Γ·͢ɻ
    

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

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

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

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

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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
    

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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
    

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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
    

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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
    

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32. 2, ͳͥ͜ͷྖҬʹڵຯΛ
    ͍࣋ͬͯΔͷ͔ʁ
    

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33. ϚΠΫϩϖΠϝϯτ
    w ̍औҾ͋ͨΓԁະຬ
    w ख਺ྉະຬ
    w શੈքͰඵؒԯऔҾҎ্
    w ݱۚ ϏοτίΠϯ
    औҾ
    w ύϒϦοΫ11ωοτϫʔΫ
    

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34. ϚΠΫϩϖΠϝϯτ
    vs ΫϨδοτΧʔυ
    w ̍औҾ͋ͨΓԁະຬ਺ඦԁҎ্
    w ख਺ྉະຬҎ্
    w શੈքͰඵؒԯऔҾҎ্ඵؒສऔҾҎԼ
    w ݱۚ ϏοτίΠϯ
    औҾϙΠϯτͳͲൃߦओମͷ
    %#্ͷ਺ࣈ
    w ύϒϦοΫ11ωοτϫʔΫൃߦओମ͕ఏڙ͢Δ
    αʔό
    

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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
    

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36. উखʹ(SBDPOFରஊ7PM
    IUUQTHSBDPOFDPKQWPM
    ϥΠτχϯάωοτϫʔΫ͸
    কདྷػց͕ओʹ࢖͏ͷͰ͸ʁ
    ਓؒ͸ػցͷಈ͖ํ͸
    ࢦࣔ͢Δ΋ͷͷ
    ࠷దԽ͸AIଆʹ೚ͤΔ
    ݄͋ͨΓ5000ԁ·ͰͳΒ
    ࢖ͬͯྑ͍ͱ͔
    

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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
    

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38. ɾݸਓͰ
    11ωοτϫʔΫΛ
    ௨ͯ͠ࢿۚ؅ཧ
    ɾ෼ࢄܕऔҾॴ
    Ծ૝௨՟औҾॴΛ
    ར༻
    ඇதԝूݖత தԝूݖత
    ݸਓͰ
    11ωοτϫʔΫΛ
    ௨ͯ͠ࢿۚ؅ཧ
    ʁʁʁ
    ηΧϯυϨΠϠʔ
    ϥΠτχϯάωοτϫʔΫ
    ϑΝʔετϨΠϠʔ
    ҉߸௨՟
    

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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
    

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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
    

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41. 3, ࠓͷঢ়گ͸ʁϏδωεͰ
    ࢖͑Δͷ͸͍͔ͭΒʁ
    

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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
    

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43. View Slide

44. View Slide

45. View Slide

46. https://twitter.com/LNstats/status/1097366414825013248
    

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47. ֊૚ߏ଄ରԠؔ܎
    Blockchains
    Lightning Payment
    Channel
    Routing Algorithm
    Atomic Multi-Path
    Payments
    ???
    ෺ཧ૚
    ϦϯΫ૚
    ωοτϫʔΫ૚
    τϥϯεϙʔτ૚
    ΞϓϦέʔγϣϯ૚
    Sphinx ϓϨθϯςʔγϣϯ૚
    ϥΠτχϯά Πϯλʔωοτ
    HTLC
    ηογϣϯ૚
    

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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
    

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

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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੒௕
    

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51. ϥΠτχϯά੟ՐϦϨʔ
    

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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
    

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53. 4, কདྷ໘നͦ͏ͳٕज़ʹ͸
    ͲΜͳ΋ͷ͕͋Δʁ
    

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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
    

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55. ஫໨͍ͯ͠Δ
    ϥΠτχϯάٕज़̍
    

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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·͏
    

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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๞࿨ͯ͠͠·͏
    

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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
    

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59. ஫໨͍ͯ͠Δ
    ϥΠτχϯάٕज़̎
    eltoo: ߋ৽ํ๏ͷ͞ΒͳΔγϯϓϧԽ
    

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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
    

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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
    

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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
    

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63. ஫໨͍ͯ͠Δ
    ϥΠτχϯάٕज़̒
    Atomic Swaps
    ϥΠτχϯάΛ࢖ͬͨϒϩοΫνΣʔϯؒෆՄ෼ίΠϯަ׵
    

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

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65. ஫໨͍ͯ͠Δ
    ϥΠτχϯάٕज़̓
    Streaming Payments
    ϥΠτχϯάૹۚͷ͞ΒͳΔޮ཰ԽɺૹۚϧʔτҰճҰճดͣ͡ʹ
    ϧʔτΛ࢖͍ճ͢
    ͜͜Λ஗Ԇͤ͞Δ͜ͱͰ
    ϓϨΠϝʔδϋογϡΛ࢖͍·Θ͠
    TX with HͷૹֹۚΛ
    Կ౓΋ॻ͖׵͑Δ
    

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66. ஫໨͍ͯ͠Δ
    ϥΠτχϯάٕज़̔
    ੥ٻॻͳ͠ͷϥΠτχϯάϖΠ
    ड͚औΓଆ͕੥ٻॻΛૹΒͳͯ͘΋ɺࢧ෷͍͕Ͱ͖Δ
    

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67. ϥΠτχϯάʹڵຯ͕͋Δํ͸͝ࢀՃ͍ͩ͘͞ɻ
    

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68. ݸਓϦϑΝϨϯε
    w աڈϓϨθϯࢿྉ
    w IUUQTXXXTMJEFTIBSFOFUMBXNOQSFTFOUBUJPOT
    w IUUQTXXXTMJEFTIBSFOFUUBLBZBJNBJ
    QSFTFOUBUJPOT
    w IUUQTTQFBLFSEFDLDPNUBLBZBJNBJ
    w -JOLFEJO
    w IUUQTXXXMJOLFEJODPNJOUBLBZBJNBJB
    

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69. fin.
    

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