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Stringをどうにかする / Managing Solidity String

Stringをどうにかする / Managing Solidity String

2019-11-29 blockchain.tokyo#23 Dapp開発Special
https://blockchain-tokyo.connpass.com/event/154664/

Ryo Manzoku

November 29, 2019
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  1. 4USJOHΛͲ͏ʹ͔͢Δ
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  2. w 3FCVJMEJOHUIFGVUVSFPGHBNJOH

    XJUICMPDLDIBJOUFDIOPMPHZ
    w ೥݄૑ۀ
    w ϒϩοΫνΣʔϯήʔϜઐۀ։ൃձࣾ
    w ैۀһਓʢۀ຿ҕୗΛؚΉʣ
    w ϒϩοΫνΣʔϯʹ೤ҙͷ͋ΔΤϯδχΞΛੵۃ࠾༻தͰ͢ʂ
    EPVCMFKVNQUPLZPגࣜձࣾ

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  3. w ຬ଍྄ʢ.BO[PLV3ZPʣ
    w EPVCMFKVNQUPLZPϦʔυΤϯδχΞ
    w ೥݄ΑΓΠϯϑϥઃܭӡ༻ɺαʔόαΠυ։ൃɺ
    4NBSU$POUSBDU։ൃɺϒϩοΫνΣʔϯٕज़ௐࠪͳͲΛ୲౰
    w աڈʹ͸ιʔγϟϧήʔϜձࣾɺ&E5FDIΞϓϦձࣾͰΠϯϑ
    ϥΤϯδχΞͱͯ͠"84Λத৺ͱͨ͠Ϋϥ΢υΠϯϑϥ͔ΒΞ
    ϓϦ·ͰͷશମઃܭɺߏஙɺվળΛܦݧ
    ࣗݾ঺հ

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  4. 4PMJEJUZॻ͍ͯ·͔͢ʁ

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  5. 4USJOHܕ࢖͍·͔͢ʁ

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  7. )FMMP8PSMEҎ֎Ͱ࢖͏͜ͱ͋Δͷʁ

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  8. &3$.FUBEBUB

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  9. &3$63*

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  10. &UISFVN͔Β֎ͷੈքΛࢀর͢Δ
    ৔߹ʹ࢖͏

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  11. 4PMJEJUZEPFTOPUIBWFTUSJOHNBOJQVMBUJPOGVODUJPOT
    CVUUIFSFBSFUIJSEQBSUZTUSJOHMJCSBSJFT
    https://solidity.readthedocs.io/en/v0.5.13/types.html#bytes-and-strings-as-arrays

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  12. Ͳ͏ʹ͔͍͖ͯ͠·͠ΐ͏

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  13. w MFO TUS

    w TUSMFOHUI
    w CZUFT TUS
    MFOHUI
    2จࣈྻͷ௕͞

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  14. w MFO TUS

    w 4PMJEJUZʹ૊ΈࠐΈͷMFO
    ͸ଘࡏ͠ͳ͍
    w TUSMFOHUI
    w .FNCFSMFOHUIOPUGPVOEPSOPUWJTJCMFBGUFS
    [email protected]
    w CZUFT TUS
    MFOHUI
    w ˓
    "จࣈྻͷ௕͞

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  15. TUSJOHJTFRVBMUPCZUFTCVUEPFT
    OPUBMMPXMFOHUIPSJOEFYBDDFTT
    https://solidity.readthedocs.io/en/v0.5.13/
    types.html#bytes-and-strings-as-arrays

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  16. w TUSTUS

    w LFDDBL TUS
    LFDDBL TUS

    w LFDDBL BCJFODPEF1BDLFE T

    LFDDBL BCJFOD
    PEF1BDLFE T


    2จࣈྻͷൺֱ

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  17. w TUSTUS

    w ඇਪ঑
    w LFDDBL TUS
    LFDDBL TUS

    w ͪΐͬͱલ·Ͱ͜Ε͕ਪ঑͞Ε͍ͯͨ
    w LFDDBL BCJFODPEF1BDLFE T

    LFDDBL BCJFOD
    PEF1BDLFE T


    w ˓W͔ΒυΩϡϝϯτʹొ৔
    "จࣈྻͷൺֱ

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  18. w TUSTUS
    w CZUFT TUS
    CZUFT TUS

    w BCJFODPEF1BDLFE TUS TUS

    w Ͳ͏ʹ͔͢Δ
    2จࣈྻͷ࿈݁

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  19. w TUSTUS
    w TUSJOH͸"SSBZͳͷͰ͸࢖͑·ͤΜ
    w CZUFT TUS
    CZUFT TUS

    w CZUFT͸"SSBZͳͷͰ͸࢖͑·ͤΜ
    w BCJFODPEF1BDLFE TUS TUS

    w ˓W͔ΒυΩϡϝϯτʹొ৔
    w Ͳ͏ʹ͔͢Δ
    "จࣈྻͷ࿈݁

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  20. BCJFODPEF1BDLFEΛ஌Βͳ͔ͬͨࠒ

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  21. w TUS>
    w CZUFT>
    w Ͳ͏ʹ͔͢Δ
    2จࣈྻͷ੾ΓऔΓ

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  22. w TUS>
    w TUSJOHJTFRVBMUPCZUFTCVUEPFTOPUBMMPXMFOHUIPS
    JOEFYBDDFTT
    w CZUFT>
    w Έ͍ͨͳΞΫηε͸Ͱ͖ͳ͍ɻจࣈ͚ͩͳΒ͜ΕͰ΋Մ
    w Ͳ͏ʹ͔͢Δ
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  23. Ͳ͏ʹ͔͢Δ

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  24. w TUSJOH J

    w TUSJOH BCJFODPEF1BDLFE J


    w Ͳ͏ʹ͔͢Δ
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  25. w TUSJOH J

    w ͦΜͳ؁͘ͳ͍
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    w Ͱ͖Δ͔ͳͱࢥ͚ͬͨͲͦΜͳ؁͘ͳ͍
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  26. Ͳ͏ʹ͔͢Δ

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  27. w BEESTUSJOH

    w TUSJOH BEES

    w TUSJOH BCJFODPEF1BDLFE BEES


    w Ͳ͏ʹ͔͢Δ
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  28. w BEESTUSJOH

    w ͦΜͳ؁͘ͳ͍
    w TUSJOH BEES

    w &YQMJDJUUZQFDPOWFSTJPOOPUBMMPXFE
    w TUSJOH BCJFODPEF1BDLFE BEES


    w &YQMJDJUUZQFDPOWFSTJPOOPUBMMPXFE
    w Ͳ͏ʹ͔͢Δˠ˓
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  29. Ͳ͏ʹ͔͢Δ

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  30. w Ͳ͏ʹ͔͢Δ
    2จࣈྻͷ4QMJU

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  31. View Slide

  32. ΄Μͱʹ͜ΕΛ΍Δͷʁ

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  33. 4PMJEJUZEPFTOPUIBWFTUSJOHNBOJQVMBUJPOGVODUJPOT
    CVUUIFSFBSFUIJSEQBSUZTUSJOHMJCSBSJFT

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  34. 044Ͱެ։ͯ͠·͢ʂ
    IUUQTHJUIVCDPN
    EPVCMFKVNQUPLZPNDIQMVTDPOUSBDUT

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  35. ϚΠΫϦΛ࢝ΊΑ͏ʂ
    https://mch.gg/start
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    ʮTHA4ʯ

    Λೖྗʂ

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