Ethereum blockchain & Tokens

ゆるゆるIT勉強会 feat.Reedex Vol.2
LT "Ethereum blockchain & Tokens"
Author: ikutani41@AnyPay, Inc.

Transcript

1. Ethereum blockchain & Tokens AnyPay, Inc. PM & UI/UX Designer @ikutani41 2018/3/21
2. Yutaro Ikutani@AnyPay, Inc. - Role: PM & UI/UX Designer - Division: Payments -> Blockchain
3. Ethereum? ▸ ༗໊blockchainͷ1ͭʢBitcoinͱ͸ผʣ ▸ Ethereum্Ͱར༻͞ΕΔίΠϯɿETHʢΠʔαʣ ▸ Ethereum foundation ▸ ૑࢝ऀɿVitalik Buterin ▸ cf.) Bitcoin͸૑࢝ऀෆࡏ ▸ “The World Computer” ▸ ࠷େͷಛ௃ɿSmart Contract ▸ ࣾձ࣮૷ɿICO
4. The World Computer? ▸ Smart Contract ▸ ந৅ɿʮܖ໿ͷهड़ͱࣥߦ͕ҰମԽ͞Εɺ෼ࢄ؀ڥͰಈ࡞͢Δ΋ͷʯ ▸ ؆୯ɿEthereum্ͰϓϩάϥϜΛ࣮ߦͤ͞ΒΕΔ࢓૊Έશൠͷ͜ͱ ▸ Solidityͱ͍͏js-likeͳνϡʔϦϯά׬શݴޠͰهड़͞ΕΔ ▸ EVM ▸ Ethereum Virtual Machine ▸ Smart Contractͷ࣮ߦ؀ڥ ▸ Computing Resource Ecosystem ▸ GasʢNode΁ͷใुʣ ▸ Node (ϚΠχϯά, τϥϯβΫγϣϯॲཧΛ࣮ߦʣ
5. ICO? ▸ ҉߸௨՟Λ࢖ͬͨࢿۚௐୡख๏ɹͱݴΘΕ͍ͯΔ ▸ ͬ͘͟Γ࢓૊Έ ▸ Whitepaper౳Λ࢖ͬͯߏ૝Λൃද ▸ Smart ContractΛ࢖ͬͯtokenΛ࣮૷͢Δ ▸ ࢀՃر๬ऀ͸Contractʹରͯ͠ETHΛૹۚ͢Δ ▸ Contract͸ETH਺ྔʹԠͯ͡tokenΛૹΓฦ͢ ▸ ICOओ࠵ଆ͸׆ಈࢿۚΛETHͰಘΔ ▸ token͕औҾॴʹ্৔͢Ε͹FiatϨʔτ͕෇͍ͯചങՄೳʹ
6. Tokens? ▸ Ethereum্ʹSmart ContractΛ࢖ͬͯ࡞ΒΕͨಠࣗίΠϯΈ͍ͨ ͳ΋ͷ ▸ ૹۚ౳ͷجຊػೳ͸EthereumͷྗΛआΓΔ ▸ tokenಠࣗͷػೳΛ࣋ͨͤͯ΋Α͍ ▸ ͍ΖΜͳtoken͕࡞ΒΕΔͨΊɺඪ४ن͕֨ࡦఆ͞Εͨ ▸ ERC20 ▸ ͍ΘΏΔίΠϯʢૹۚɾަ׵͕Մೳɻ਺ྔ֓೦͋Γʣ ▸ ΠϯλʔϑΣʔεͱΠϕϯτ͕ఆٛ͞Εͨ ▸ ن͕֨͋Δ͚ͩʢຊ౰ʹͦͷΑ͏ʹಈ࡞͢Δอূ͸ͳ͍ʣ
7. ERC223: ERC20ͷ্Ґޓ׵ ▸ ERC20͕࣋ͭ໰୊΁ͷରॲ ▸ ʮॲཧͰ͖ͳ͍಺༰ͷTX͕Contractʹରͯ͠ૹ৴͞Εͨ ࣌ʹɺͦͷ··ঝೝ͞Εͯ͠·͍GOX͢Δ໰୊ʯ ▸ ૢ࡞ϛεɺޡΞφ΢ϯε౳Ͱͨ͘͞Μͷtoken͕GOXͨ͠ ▸ token fallbackػೳΛ௥Ճ ▸ TX͕ॲཧͰ͖ͳ͍৔߹ɺSenderʹૹΓฦ͞ΕΔ ▸ ERC20΁ͷޙํޓ׵ੑ͋Γ
8. ERC721:৽͍͠༻్Λࢤ޲ͨ͠token ▸ Collectiblesʢऩू඼ʣͷදݱ͕ՄೳʹͳΔن֨ ▸ Crypto KittiesͰ༗໊ʹͳͬͨʢϦϦʔε਺೔Ͱ130ສυϧͷऔҾֹʣ ▸ IDΛ࣋ͭݸผτʔΫϯ͕ओ໾ ▸ ERC721 token͸ݸผτʔΫϯͷIDΛ֨ೲ͢Δͨͩͷ഑ྻ ▸ Non-Fungible Token(NFT) ͱݺ͹ΕΔ ▸ ୅ସෆՄೳͱ͍͏ҙຯ ▸ ݸผτʔΫϯ͸།ҰແೋͷଘࡏͰ͋Γ਺ྔ֓೦Λ࣋ͨͳ͍ͱ͍͏ҙຯ ▸ ETHʹΑΔ஋෇͚Λͯ͠ചങ͢Δ͜ͱ͸Մೳ ▸ ݸผτʔΫϯʹର͢Δ࢓༷΍؅ཧํ๏͸ن֨ͷείʔϓ֎ ▸ ֎෦ετϨʔδͱ͔࢖ͬͯࣗ༝ʹ΍Δ
9. What’s ERC721 for? ▸ σδλϧΞηοτ ▸ ίϐʔෆՄͰϢχʔΫͳσδλϧΞηοτ ▸ Τϯλϝͱͷ૬ੑͷྑ͞ ▸ ίϯαʔτνέοτ ▸ ର৅Πϕϯτɺ೔෇ɺ੮·Ͱࢦఆ͢Ε͹unique ▸ ِ଄๷ࢭͰ͖Δ ▸ ܳज़඼΍ෆಈ࢈ ▸ ೉͍͠ͱ͸ࢥ͏͕ҰԠτʔΫϯԽͰ͖Δ ▸ ଞʹ΋͍Ζ͍ΖΞΠσΟΞ͸ࢥ͍͖ͭͦ͏
10. ·ͩ·ͩਐԽத… ࡶͳ·ͱΊ
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