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Ethereum blockchain & Tokens
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Yutaro Ikutani
March 21, 2018
Technology
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Ethereum blockchain & Tokens
ゆるゆるIT勉強会 feat.Reedex Vol.2
LT "Ethereum blockchain & Tokens"
Author: ikutani41@AnyPay, Inc.
Yutaro Ikutani
March 21, 2018
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Transcript
Ethereum blockchain & Tokens AnyPay, Inc. PM & UI/UX Designer
@ikutani41 2018/3/21
Yutaro Ikutani@AnyPay, Inc. - Role: PM & UI/UX Designer -
Division: Payments -> Blockchain
Ethereum? ▸ ༗໊blockchainͷ1ͭʢBitcoinͱผʣ ▸ Ethereum্Ͱར༻͞ΕΔίΠϯɿETHʢΠʔαʣ ▸ Ethereum foundation ▸ ࢝ऀɿVitalik
Buterin ▸ cf.) Bitcoin࢝ऀෆࡏ ▸ “The World Computer” ▸ ࠷େͷಛɿSmart Contract ▸ ࣾձ࣮ɿICO
The World Computer? ▸ Smart Contract ▸ நɿʮܖͷهड़ͱࣥߦ͕ҰମԽ͞ΕɺࢄڥͰಈ࡞͢Δͷʯ ▸ ؆୯ɿEthereum্ͰϓϩάϥϜΛ࣮ߦͤ͞ΒΕΔΈશൠͷ͜ͱ
▸ Solidityͱ͍͏js-likeͳνϡʔϦϯάશݴޠͰهड़͞ΕΔ ▸ EVM ▸ Ethereum Virtual Machine ▸ Smart Contractͷ࣮ߦڥ ▸ Computing Resource Ecosystem ▸ GasʢNodeͷใुʣ ▸ Node (ϚΠχϯά, τϥϯβΫγϣϯॲཧΛ࣮ߦʣ
ICO? ▸ ҉߸௨՟Λͬͨࢿۚௐୡख๏ɹͱݴΘΕ͍ͯΔ ▸ ͬ͘͟ΓΈ ▸ WhitepaperΛͬͯߏΛൃද ▸ Smart ContractΛͬͯtokenΛ࣮͢Δ
▸ ࢀՃرऀContractʹରͯ͠ETHΛૹۚ͢Δ ▸ ContractETHྔʹԠͯ͡tokenΛૹΓฦ͢ ▸ ICOओ࠵ଆ׆ಈࢿۚΛETHͰಘΔ ▸ token͕औҾॴʹ্͢ΕFiatϨʔτ͕͍ͯചങՄೳʹ
Tokens? ▸ Ethereum্ʹSmart ContractΛͬͯ࡞ΒΕͨಠࣗίΠϯΈ͍ͨ ͳͷ ▸ ૹۚͷجຊػೳEthereumͷྗΛआΓΔ ▸ tokenಠࣗͷػೳΛ࣋ͨͤͯΑ͍ ▸
͍ΖΜͳtoken͕࡞ΒΕΔͨΊɺඪ४ن͕֨ࡦఆ͞Εͨ ▸ ERC20 ▸ ͍ΘΏΔίΠϯʢૹۚɾަ͕Մೳɻྔ֓೦͋Γʣ ▸ ΠϯλʔϑΣʔεͱΠϕϯτ͕ఆٛ͞Εͨ ▸ ن͕֨͋Δ͚ͩʢຊʹͦͷΑ͏ʹಈ࡞͢Δอূͳ͍ʣ
ERC223: ERC20ͷ্Ґޓ ▸ ERC20͕࣋ͭͷରॲ ▸ ʮॲཧͰ͖ͳ͍༰ͷTX͕Contractʹରͯ͠ૹ৴͞Εͨ ࣌ʹɺͦͷ··ঝೝ͞Εͯ͠·͍GOX͢Δʯ ▸ ૢ࡞ϛεɺޡΞφϯεͰͨ͘͞Μͷtoken͕GOXͨ͠ ▸
token fallbackػೳΛՃ ▸ TX͕ॲཧͰ͖ͳ͍߹ɺSenderʹૹΓฦ͞ΕΔ ▸ ERC20ͷޙํޓੑ͋Γ
ERC721:৽͍͠༻్Λࢤͨ͠token ▸ Collectiblesʢऩूʣͷදݱ͕ՄೳʹͳΔن֨ ▸ Crypto KittiesͰ༗໊ʹͳͬͨʢϦϦʔεͰ130ສυϧͷऔҾֹʣ ▸ IDΛ࣋ͭݸผτʔΫϯ͕ओ ▸ ERC721
tokenݸผτʔΫϯͷIDΛ֨ೲ͢Δͨͩͷྻ ▸ Non-Fungible Token(NFT) ͱݺΕΔ ▸ ସෆՄೳͱ͍͏ҙຯ ▸ ݸผτʔΫϯ།ҰແೋͷଘࡏͰ͋Γྔ֓೦Λ࣋ͨͳ͍ͱ͍͏ҙຯ ▸ ETHʹΑΔ͚Λͯ͠ചങ͢Δ͜ͱՄೳ ▸ ݸผτʔΫϯʹର͢Δ༷ཧํ๏ن֨ͷείʔϓ֎ ▸ ֎෦ετϨʔδͱ͔ͬͯࣗ༝ʹΔ
What’s ERC721 for? ▸ σδλϧΞηοτ ▸ ίϐʔෆՄͰϢχʔΫͳσδλϧΞηοτ ▸ Τϯλϝͱͷ૬ੑͷྑ͞ ▸
ίϯαʔτνέοτ ▸ ରΠϕϯτɺɺ੮·Ͱࢦఆ͢Εunique ▸ ِࢭͰ͖Δ ▸ ܳज़ෆಈ࢈ ▸ ͍͠ͱࢥ͏͕ҰԠτʔΫϯԽͰ͖Δ ▸ ଞʹ͍Ζ͍ΖΞΠσΟΞࢥ͍͖ͭͦ͏
·ͩ·ͩਐԽத… ࡶͳ·ͱΊ
We’re Hiring! ▸ Empower All Payments with us. ▸ ྑ͔ͬͨΒಡΜͰͶʢTwitter
@ikutani41ʣ