不適用的權杖架構鏈碼套件

不可行的權杖架構使用區塊鏈 App 產生器支援的擴充 ERC-721 標準。

NFT Art Collection Marketplace 範例說明使用非可行記號一般架構，此架構以 Blockchain App Builder 支援的延伸 ERC-721 標準為基礎。此範例包含一個鏈碼，代表用於購買和銷售與藝術作品相關的不可行變數替代字 (NFT)。在此範例中，博物館可以為區塊鏈網路中的圖稿染 (建立) NFT。消費者之後可以從博物館購買 NFT，再經銷。該鏈碼實行了管理不可行記號生命週期所需的方法，包括記號初始化、帳戶作業、角色指派、挖掘、轉移和燒錄。它也提供核准採礦、移轉及燃燒作業的公證帳戶，並透過每日限制與稽核程序來支援規範。NFT Art Collection Marketplace 範例是針對 TypeScript 中的鏈碼開發所設計。

無法執行的權杖架構鏈碼套件可從 Oracle Blockchain Platform 主控台下載，並包含下列元件。

NFTCollectiblesWithERC721.zip，包含用於部署之封裝鏈碼的封存檔案。
NFTCollectiblesWithERC721-TypeScript.yaml，您可以搭配 Blockchain App Builder 使用以編排 NFTCollectiblesWithERC721 鏈碼的規格檔案。
NFTCollectiblesWithERC721_postman_collection.json - Postman 集合，可讓您測試鏈碼中的 API。
README.md - 使用鏈碼的逐步指南。

若要取得有趣的權杖架構，請在 Oracle Blockchain Platform Digital Assets 主控台中，按一下數位資產頁籤，然後選取不可見權杖架構。

如需有關使用 Postman 集合的詳細資訊，請參閱下列主題。

規格檔案

用來產生藝術集合市集鏈碼的規格檔案包含 events 屬性。鏈碼事件功能支援所產生鏈碼中的事件回呼，以啟用即時通知並觸發工作流程。如需有關規格檔案與規格檔案中所使用參數的詳細資訊，請參閱使用 Oracle Blockchain Platform 中的非真品替代字的輸入規格檔案。

藝術收藏市場鏈碼是以延伸的 ERC-721 標準為基礎，如下列規格檔案所示。

#
# Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
#
 
# This specification file is an example how to build any whole non-fungible token application.
# For a whole non-fungible token application, art collection marketplace has been used as an example.
# Art collection marketplace is a digital marketplace that uses NFTs to enable the buying, selling, and showcasing of unique art pieces, providing secure ownership, provenance tracking, and exclusive rights for artists and collectors.
 
assets:
    - name: ArtCollection #Asset name
      type: token #Asset type
      symbol: ART         # Token symbol
      standard: erc721+   # Token standard
      events: true # Supports event code generation for non-GET methods
 
      anatomy:
          type: nonfungible # Token type
          unit: whole  #Token unit
       
      behavior:
        - indivisible
        - singleton                               
        - mintable:                  
            max_mint_quantity: 20000
        - transferable               
        - lockable
        - roles:
            minter_role_name: minter
       
      properties:  # Custom asset attributes for non-fungible token
           
          - name: Price # Custom asset attribute to set the price of a non-fungible token in the marketplace
            type: float
           
          - name: On_Sale_Flag # Custom asset attribute to maintain non-fungible token selling status in the marketplace
            type: boolean
       
      metadata: # To maintain the metadata on-chain, this tag will be used. Users won't be able to update the metadata attribute values after an NFT is minted.
           
          - name: Painting_Name # Custom asset attribute to represent the title given to a piece of artwork.
            type: string
           
          - name: Description # Custom asset attribute to represent a detailed explanation or interpretation of the painting's concept, style, or message.
            type: string
           
          - name: Painter_Name # Custom asset attribute to represent the name of the artist who created the painting.
            type: string
 
customMethods:
    - executeQuery
    - "post(token_id: string, selling_price: number)" # Post the non-fungible token for selling in the marketplace.
    - "buy(from_org_id: string, from_user_id: string, to_org_id: string, to_user_id: string, nonfungible_token_id: string, amount_paid: number)"  # Buy the non-fungible token after paying the amount using any payment gateways.

鏈碼方法中的背書人明細

Oracle Blockchain Platform Digital Assets Edition 會為所有 setter 方法的要求有效負載新增背書參數。參數的值為 endorsers 或 sameOrgEndorser。如果 sameOrgEndorser 參數為 true，則交易背書必須來自與要求者相同的組織。endorsers 參數指定必須為交易背書的對等項目清單。如需詳細資訊，請參閱 Postman Collections 中的背書支援。下表顯示每個方法的背書人類型。

方法	背書人類型
`activateAccount`	`endorsers`
`addTokenAdmin`	`sameOrgEndorser`
`addRole`	`endorsers`
`addTokenSysRole`	`endorsers`
`balanceOf`	`endorsers`
`buy`	`endorsers`
`createAccount`	`endorsers`
`createArtCollectionToken`	`sameOrgEndorser`
`deleteAccount`	`endorsers`
`getAccountByUser`	`endorsers`
`getAccountHistory`	`endorsers`
`getAccountsByRole`	`endorsers`
`getAccountsByTokenSysRole`	`endorsers`
`getAccountStatus`	`endorsers`
`getAccountStatusHistory`	`endorsers`
`getAccountTransactionHistory`	`endorsers`
`getAccountTransactionHistoryWithFilters`	`endorsers`
`getAllAccounts`	`endorsers`
`getAllLockedNFTs`	`endorsers`
`getAllTokenAdmins`	`endorsers`
`getAllTokens`	`endorsers`
`getAllTokensByUser`	`endorsers`
`getLockedNFTsByOrg`	`endorsers`
`getTokenById`	`endorsers`
`getTokenHistory`	`endorsers`
`getTransactionById`	`endorsers`
`getUserByAccountId`	`endorsers`
`getUsersByRole`	`endorsers`
`getUsersByTokenSysRole`	`endorsers`
`init`	`endorsers`
`isInRole`	`endorsers`
`isInTokenSysRole`	`endorsers`
`isNFTLocked`	`endorsers`
`isTokenAdmin`	`endorsers`
`lockNFT`	`sameOrgEndorser`
`name`	`endorsers`
`ownerOf`	`endorsers`
`post`	`endorsers`
`removeRole`	`endorsers`
`removeTokenAdmin`	`sameOrgEndorser`
`removeTokenSysRole`	`endorsers`
`safeTransferFrom`	`endorsers`
`suspendAccount`	`endorsers`
`symbol`	`endorsers`
`tokenURI`	`endorsers`
`totalNetSupply`	`endorsers`
`totalSupply`	`endorsers`
`transferFrom`	`endorsers`
`transferTokenSysRole`	`endorsers`
`updateArtCollectionToken`	`sameOrgEndorser`