An Introduction to LINE Blockchain Platform

Keun Koo
LINE Plus Unchain Engineer
https://linedevday.linecorp.com/2020/ja/sessions/9873
https://linedevday.linecorp.com/2020/en/sessions/9873

Transcript

2. Cashew (Testnet) Daphne (Mainnet) LINE Blockchain Developers BITMAX Wallet LINE Blockchain Explorer Your Game Your Travel Your Health Your Social LINE Blockchain LINE Blockchain Platform Your Blockchain Services Data pipeline LINE Blockchain Framework Query Transaction Keystore
3. Cashew (Testnet) Daphne (Mainnet) LINE Blockchain Developers BITMAX Wallet LINE Blockchain Explorer Your Game Your Travel Your Health Your Social LINE Blockchain LINE Blockchain Platform Your Blockchain Services Data pipeline LINE Blockchain Framework Query Transaction Keystore
4. Cashew (Testnet) Daphne (Mainnet) LINE Blockchain Developers BITMAX Wallet LINE Blockchain Explorer Your Game Your Travel Your Health Your Social LINE Blockchain LINE Blockchain Platform Your Blockchain Services Data pipeline LINE Blockchain Framework Query Transaction Keystore
5. Cashew (Testnet) Daphne (Mainnet) LINE Blockchain Developers BITMAX Wallet LINE Blockchain Explorer Your Game Your Travel Your Health Your Social LINE Blockchain LINE Blockchain Platform Your Blockchain Services Data pipeline LINE Blockchain Framework Query Transaction Keystore
6. Cashew (Testnet) Daphne (Mainnet) LINE Blockchain Developers BITMAX Wallet LINE Blockchain Explorer Your Game Your Travel Your Health Your Social LINE Blockchain LINE Blockchain Platform Your Blockchain Services Data pipeline LINE Blockchain Framework Query Transaction Keystore
7. Cashew (Testnet) Daphne (Mainnet) LINE Blockchain Developers BITMAX Wallet LINE Blockchain Explorer Your Game Your Travel Your Health Your Social LINE Blockchain LINE Blockchain Platform Your Blockchain Services Data pipeline LINE Blockchain Framework Query Transaction Keystore
8. Cashew (Testnet) Daphne (Mainnet) LINE Blockchain Developers BITMAX Wallet LINE Blockchain Explorer Your Game Your Travel Your Health Your Social LINE Blockchain LINE Blockchain Platform Your Blockchain Services Data pipeline LINE Blockchain Framework Query Transaction Keystore
9. BITMAX Wallet https://wallet.bitmax.me
10. Custodial wallet service for LINE users › LINE is responsible for storage of private keys › No chance to lose your private key › Designed for mass adoption › No need to install browser extensions or client apps › Grant transactions with a plain browser › via LINE message › via page redirect
11. BITMAX integration › BITMAX: LINE’s crypto asset trading service › https://www.bitmax.me/ › BITMAX user → BITMAX Wallet user › But not vice versa › Shows balance of LINK(LN) in BITMAX › Redeem LINK Rewards to LINK › https://blockchain.line.me/linkrewards/ › LINK Reward : NFT on Daphne › LINK : LINE’s cryptocurrency on Bamboo › KYC is required on BITMAX
12. Features › LINE Login › Cashew / Daphne › Access your tokens › For all services › Service token, Item token › Send tokens to LINE friends › Do not write down wallet addresses › Even for non-BITMAX Wallet users
13. LINE Blockchain Developers https://blockchain.line.biz/
14. High-level API service for LINE Blockchain Console RESTful API Docs
15. High-level API service for LINE Blockchain Console RESTful API Docs
16. High-level API service for LINE Blockchain Console RESTful API Docs
17. API Key features Callback Item tokens Transactions Service wallets Users Service tokens
18. DEMO › LBCC (LINE Blockchain Coffee Coin) › Service token (Fungible) › Americano : 200 LBCC › LBCR (LINE Blockchain Coffee Reward) › Item token (Non-fungible) › Buy 1 Americano, Get 1 LBCR › 5 LBCR : 1 Americano https://github.com/behumble/line-blockchain-coffee
20. DEMO 02: Create a service & a service wallet
21. DEMO-04: Create a service token (LBCC)
22. DEMO: Create LBCR
23. DEMO: Find transactions with LBE
24. DEMO: Cashew only Add a test user
25. Run line-blockchain-coffee › https://github.com/behumble/line-blockchain-coffee › Written in JavaScript › https://nuxtjs.org/ › https://vuetifyjs.com/ › LINE Login npm package › https://github.com/nkjm/line-login › Find User ID on login success › like U111ed5915b06ee098a24a725d02f5d40
26. DEMO: Environment variables
27. DEMO: Run server and set callback uri
28. DEMO: Send to a user from Console UI
29. Server-to-Server API Your Service LINE Blockchain Developers User Client-Server authentication (Cookie / Session) Server-Server authentication (API Key/Secret)
30. Signing API Requests https://docs-blockchain.line.biz/api-guide/Authentication normalize timestamp nonce API secret signature › Verify sender › Tamper-proof › Protect against replay attacks › Dev tips › Signing proxy server › https://github.com/behumble/lbp-signing-proxy › Sample snippets (Golang, JavaScript, C#) › Go : https://github.com/line/blockchain-sample-link-cinema/blob/bfe38337f941dee0b342fe865ac0e38ac297e962/api/api.go#L117 › JS : https://github.com/behumble/lbp-signing-proxy/blob/master/lbp.js#L4 › C# : https://github.com/line/blockchain-sample-mage-duel/blob/master/Server/TCGSampleServer/Service/TCGGameService/LBD/Util/Signature.cs#L124
31. DEMO: Using API with cURL
32. DEMO: Mint and balance in LBC
33. DEMO: Metamask
34. DEMO: LINE Blockchain Coffee
35. DEMO: What’s in the LBCR?
36. Item token image base URI ${BASE_IMAGE_URI}${TOKEN-ID} or ${BASE_IMAGE_URI}${TOKEN-TYPE}
37. Why LINE Blockchain Platform? Large User Base Ease of use LINK Rewards
38. Choose your plan
39. Thank you