Introduce non-fungible token module

[shuse2]

LIP

• Introduce NFT module

Motivation

NFTs are very common in the blockchain space and have uses in a wide range of applications. This can go from being the virtual representation of a real world object (art, fashion, event tickets ...) to purely virtual collectibles (crypto kitties, ...).

Therefore, providing a unified module to handle, transfer and modify NFTs is a necessity for the Lisk ecosystem.

Tasks

Sprint 95

• Prepare general structure of NFT module #8390

Sprint 96

• Implement stores for NFT module #8391
• Implement events for NFT module #8392
• Implement transfer command for NFT module #8393
• Implement internal function createUserEntry for NFT module #8490
• Implement internal function transferInternal for NFT module #8492

Sprint 97

• Implement internal function createNFTEntry for NFT module #8489
• Implement method isNFTSupported for NFT module #8536
• Implement methods getAttributesArray and getAttributes for NFT module #8537
• Implement endpoint for NFT module #8398
• Implement internal function getNewAttributes for NFT module #8494
• Implement internal function transferCrossChainInternal for NFT module #8493
• Implement cross chain command for cross chain transfer for NFT module #8395
• Implement internal function createEscrowEntry for NFT module #8491
• Implement method getNextAvailableIndex for NFT module #8538
• Implement method create for NFT module #8539
• Implement transfer cross chain command for NFT module #8394
• Implement method lock for NFT module #8540
• Implement method unlock for NFT module #8541
• Implement method transfer for NFT module #8543
• Implement method transferCrossChain for NFT module #8544
• Implement methods supportAllNFTs and removeSupportAllNFTs for NFT module #8546
• Implement methods supportAllNFTsFromChain and removeSupportAllNFTsFromChain for NFT module #8547
• Implement methods supportAllNFTsFromCollection and removeSupportAllNFTsFromCollection for NFT module #8548
• Resolve circular dependency in NFT module #8585
• Register and init commands and cross chain command in NFT module #8586

Sprint 98

• Implement method setAttributes for NFT module #8542
• Implement method recover for NFT module #8545
• Implement method for NFT module #8396
• Update NFT and token module with additional checks and LIP updates #8580
• Update methods createNFTEntry and create of NFT module with additional checks #8628
• Implement initGenesisState hook for NFT module #8397

Sprint 99

• Add NFT to example app and create a module to interact #8403
• Define NFTModule.name method #8661
• Initialize methods & commands in NFT module #8664
• Update NFT module to add check for isChannelActive #8668
• Create method generates incorrect nftID  #8688

Sprint 100

• NFTEndpoint.getNFT endpoint fails if NFT is escrowed #8714
• Add functionality to create and transfer NFTs to interop example app #8734
• NFTMethod.getNextAvailableIndex iterates over all chains #8729
• NFTMethod.getNextAvailableIndex iterates over all chains #8729
• NFTMethod.create generates incorrect index #8724
• Build fails on branch feature/6917-implement-nft-module #8776
• NFT indexes should start from 0 instead of 1. #8757

Sprint 101

• Sidechain one in example app fails upon start #8830
• Receiving chain incorrectly checks for the owner of nft when sending chain is not own chain #8831
• Method isNFTSupported incorrectly checks if the nft already exists #8832
• Support all nft's on mainchain and all nft's originating from mainchain on sidechain one in example app #8833
• TransferCrossChainCommand of NFT module fails on execution #8791