2022年11月17日(木)、SBI 金融経済研究所 FinTech 研究会での発表にて使用したスライドです。
Web3Web3 — 2022-11-17 – p.1/29
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( )SFC ( )CSO (Chief Science Officer)1993 ( )2006 ( )SFC22 P2P (Peer-to-Peer)2011 ( )2018 2019VR 2021.7 VR 2021.8 “ALL THESE WORLDS ARE YOURS”VR 2021.9 & VR 2021.12VR 2022.3 VR 2022.8→ ( )Web3 — 2022-11-17 – p.2/29
web3DeFi ( )NFT ( ),DAO ( )( )web3Web3 — 2022-11-17 – p.3/29
Web3 — 2022-11-17 – p.4/29
ެ։ாެ։Ͱͳ͚ΕͳΒͳ͍ ʜຊਓɾૹۚهɾίʔυɾσʔλͷมԽɾ࣮ߦϩάݕӾͰ͖Δୈࡾऀ͜Εɺه͍ͨ͠Μ͚ͩͲ͋ͳͨॻ͍ͨΒμϝ͜ͷ༰ॻ͍ͨΒμϝॻ͍ͪΌͬͨͷʁ͜͏ॻ͖͑·͠ΐ͏ॻ͍ͯͳ͍ͷʁ͜͏ॻ͔Εͨ͜ͱʹ͠·͠ΐ͏ॻ͍ͪΌͬͨͷʁফ͠·͠ΐ͏%P4 ߈ܸͱ͔Ͱͯ͠ࢭΊ·͠ΐ͏Web3 — 2022-11-17 – p.5/29
( )= = DoS (Denial of Service):. . .( : )( ). . .. . .. . .⇒Web3 — 2022-11-17 – p.6/29
⇒( ). . .. . .( )Web3 — 2022-11-17 – p.7/29
߹ҙ͞Εͨਖ਼࢙ ϩʔΧϧʹෳΛҡ࣋ ϒϩοΫ ҉߸ֶతμΠδΣετϒϩοΫνΣʔϯͷҡ࣋ࢀՃऀ͕ϩʔΧϧʹཧ͢Δσʔλۭؒ࣌ؒ ΑΓ৽͍͠ه τϥϯβΫγϣϯΦϒδΣΫτͷੜ·ͨϝοηʔδ ܨ͙ͨΊʹίετ͕͔͔ΔΦϒδΣΫτ τʔΫϯγεςϜ ঢ়ଶભҠɹঢ়ଶมԽͷࢦࣔޱ࠲ߴɹͷঢ়ଶঢ়ଶ`ϝỽηồδDAG(DirectedAcyclic Graph;)()Web3 — 2022-11-17 – p.8/29
Web3Web3 — 2022-11-17 – p.9/29
Web 1-2-3͍ΘΏΔ8FC8FC888ਖ਼࢙తͳྲྀΕ ۚ༥ແؔ Ϣʔβ͕ࣗ؆୯ʹσʔλͷੜ࢈ऀʹͪΐͬͱ͕ζϨΔ͔ͳΓ͕ζϨΔࢭ༲8FCˠXFC 8FCϢʔβࣗͱެӹͷͨΊʹσʔλࣗ༝ʹ׆༻Ͱ͖͍ͯΔ͔ʁσʔλΛΦϨͨͪͷखʹऔΓͤʂ৫ʹཧͤ͞Δͳͯ͢ͷͯ͢Λۚ༥τʔΫϯԽͯ͠ղܾ͠Ζ#FSOFST-FF ͷ#FSOFST-FF ͷ0` 3FJMMZ ͷ8PPE ͷ#JUDPJO&UIFSFVNWeb3 — 2022-11-17 – p.10/29
Web3 (1/3)Web 1.0 (Berners-Lee, 1989) : World Wide Web( )Web 2.0 (O’Reilly, 2005) :→⇑ Web 3.0 web3Web 3.0 (Berners-Lee, 2006) :Web ( ) →Web 3.0/web3 Web 1.0( Web 2.0 )Web3 — 2022-11-17 – p.11/29
Web3 (2/3)Web 3.0 (Wood, 2014) → web3 :4(1) (Ethereum )(2) ( ) (Ethereum )(3) ( ) (Ethereum )· ( (1) )· web3(4) (web Ethereum )(4) {Javascript|Python} web3.{js|py}(2014∼)Web3 — 2022-11-17 – p.12/29
Web3 (3/3). . .Web3— Olga Kharif, “What You Need to Know About Web3, Crypto’s Attempt to Reinvent the Internet”, Bloomberg (2021)( )( )→( )( )Web3 — 2022-11-17 – p.13/29
DeFi, NFT, DAO( DoS )( )Web3 — 2022-11-17 – p.14/29
DeFi ( )DeFi : Decentralized Finace(DEX): (1 )(2021-11-17)Web3 — 2022-11-17 – p.15/29
NFT ( )NFT : Non-Fungible Token( )(1 ) → fungible token(1 ) → NFTWeb3 — 2022-11-17 – p.16/29
NFT( ) (NFT )Web3 — 2022-11-17 – p.17/29
ERC-721ERC (Ethereum Request for Comments) 721 (721 )https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.mdinterface ERC721 {function balanceOf(address _owner) external view returns (uint256);function ownerOf(uint256 _tokenId) external view returns (address);function safeTransferFrom(address _from, address _to, uint256 _tokenId,. . .) external payable;:}interface ERC721TokenReceiver {function onERC721Received(.. ., uint256 _tokenId,. . .) external returns(bytes4);}interface ERC721Metadata {function name() external view returns (string _name);function symbol() external view returns (string _symbol);function tokenURI(uint256 _tokenId) external view returns (string);}tokenURI URL ( ) ( )Web3 — 2022-11-17 – p.18/29
NFT ( )τʔΫϯ *%൪߸63*ΞυϨε63*/'5ҰҙҰҙʁ ҰҙʁҰҙʁҰҙࣄ্࣮ҰҙϝλσʔλίϯτϥΫτͱ͍͏ఆٛҬ ˞ͦͷίϯτϥΫτͱ͍͏ఆٛҬͷதͰɹ࣮ઢҹͰࣔͨ͠ҰҙੑΛอূ͢Δʹա͗ͳ͍˞ഁઢҹͰࣔͨ͠Ұҙੑɺ࣮ɾӡ༻ͷ࣍ୈͰอূͰ͖Δɻɹྫ͑ɺ63- ͕ͦΕ͕ࢦ͢Ϧιʔεͷ҉߸ֶతμΠδΣετΛؚΉɹ ྫ *1'4 ͷར༻ ͜ͱͰʮ63*ˠσʔλʯͷҰҙੑΛอͯΔɻ˞63* 6OJGPSN3FTPVSDF*EFOUJpFS౷Ұࢿݯࣝผࢠ ͱͯ͠ɹ63- 6OJGPSN3FTPVSDF-PDBUPS౷ҰࢿݯҐஔࢦఆࢠ ͕Α͘༻͍ΒΕΔɻରσʔλը૾ॴ༗ऀϝλσʔλ 63* ରσʔλ 63*ൿີ伴ҰҙҰҙʁWeb3 — 2022-11-17 – p.19/29
NFTNFT URLMarlinspike, M.: My first impressions of web3 (2022)Web3. . .URL↑ NFT → → NFTNFT ↔→NFTLazy Minting NFT( )Web3 — 2022-11-17 – p.20/29
NFT< , ID>ERC-721 ←OKNFT . . .ID→ID NFTNFTURL. . .URL. . .→NFTWeb3 — 2022-11-17 – p.21/29
NFTNFT. . .NFT ( )↑ID. . .NFT ( )Web3 — 2022-11-17 – p.22/29
NFT :ERC-721 NFTNFT (ID)NFT → URINFT( NFT )(ID)(URI) → NFT ( )URI → ( )→ ( )NFTNFT NFTWeb3 — 2022-11-17 – p.23/29
DAO ( )DAO : Decentralized Autonomous OrganizationVitalik Buterin (Ethereum )https://blog.ethereum.org/2014/05/06/daos-dacs-das-and-more-an-incomplete-terminology-guide/(1)(2) ( )(3)DAO. . ./Web3 — 2022-11-17 – p.24/29
DAO(1) ( )(2)(3). . .(a) ( )(b) ( )https://medium.com/coinmonks/beanstalk-exploit-a-simplified-post-mortem-analysis-92e6cdb17aceWeb3 — 2022-11-17 – p.25/29
MakerDAOhttps://docs.makerdao.com/smart-contract-modules/governance-moduleplot ( )drop ( )plot eta ( ) exec ( )https://github.com/dapphub/ds-chief/blob/master/src/chief.solhttps://github.com/dapphub/ds-auth/blob/master/src/auth.solhttps://github.com/dapphub/ds-pause/blob/master/src/pause.solWeb3 — 2022-11-17 – p.26/29
V.Buterin෦ࢿຊˢ͋Δɹɹɹɹˣͳ͍தԝʹࣗಈɹɹɹɹɹWTɹɹɹɹɹɹதԝʹਓؒશͳ "*σʔϞϯϑΥʔϥϜXFCαʔϏεϩϘοτΛ%"0%"QQݹయత৫ɹɹɹɹɹपԑʹਓؒɹɹɹɹWTपԑʹࣗಈ. . .( )Web3 — 2022-11-17 – p.27/29
( ) ( )DeFiDeFiWeb3 DAOSF·Web3 — 2022-11-17 – p.28/29
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