Tracking transfer event & updating nft owner (#436)

* Adding Tranfer eventHandler to subgraph.template.yaml

* Started adding transfer event to mapping

* updating getNftTokenWithID function

* Pulling from Origin v4main

* Removing console.log

* Updating token Utils

* Updating newOwner with User & writting new test

* Updating test

* Ensuring account is in lowercase

* Creating seperate test for transfering an NFT query

* Updating test name

* Removing console.logs

* Moviving transfer event tracking from factory to template

* Moving handleNftTransferred to nftUpdate mapping

* Adding logging

* Using correct token address

* Fix linting

* Checking the correct owner account has been set originally

scripts/generatenetworkssubgraphs.js

@@ -1,6 +1,6 @@
 /* eslint-disable no-unused-vars */
-var fs = require('fs')
-var addresses = require('@oceanprotocol/contracts/addresses/address.json')
+const fs = require('fs')
+let addresses = require('@oceanprotocol/contracts/addresses/address.json')
 
 async function replaceContractAddresses() {
   // load addresses file first

src/mappings/nftUpdate.ts

@@ -12,10 +12,12 @@ import {
   RemovedFromCreateERC20List,
   RemovedFromMetadataList,
   RemovedManager,
-  CleanedPermissions
+  CleanedPermissions,
+  Transfer
 } from '../@types/templates/ERC721Template/ERC721Template'
 import { NftUpdateType } from './utils/constants'
-import { getNftToken } from './utils/tokenUtils'
+import { getNftToken, getNftTokenWithID } from './utils/tokenUtils'
+import { getUser } from './utils/userUtils'
 
 function getId(tx: string, nftAddress: string): string {
   return `${tx}-${nftAddress}`
@@ -247,3 +249,12 @@ export function handleCleanedPermissions(event: CleanedPermissions): void {
   nft.managerRole = newList
   nft.save()
 }
+
+export function handleNftTransferred(event: Transfer): void {
+  const id = event.address.toHex()
+  const nft = getNftTokenWithID(id)
+  const newOwner = getUser(event.params.to.toHexString())
+  nft.owner = newOwner.id
+
+  nft.save()
+}

src/mappings/utils/tokenUtils.ts

@@ -60,6 +60,20 @@ export function getNftToken(address: Address): Nft {
   return newToken
 }
 
+export function getNftTokenWithID(tokenId: string): Nft {
+  let nftToken = Nft.load(tokenId)
+  if (nftToken === null) {
+    nftToken = new Nft(tokenId)
+    // const contract = ERC721Template.bind(address)
+    nftToken.name = ''
+    nftToken.symbol = ''
+    nftToken.address = tokenId
+    nftToken.save()
+    addNft()
+  }
+  return nftToken
+}
+
 export function getUSDValue(
   address: string,
   value: BigDecimal,

subgraph.template.yaml

@@ -197,6 +197,8 @@ templates:
           handler: handleRemovedManager
         - event: CleanedPermissions(indexed address,uint256,uint256)
           handler: handleCleanedPermissions
+        - event: Transfer(indexed address,indexed address,indexed uint256)
+          handler: handleNftTransferred
 
   - name: Dispenser
     kind: ethereum/contract

test/integration/SimplePublishConsume.test.ts

@@ -192,4 +192,93 @@ describe('Simple Publish & consume test', async () => {
     }
     */
   })
+  it('should publish and transfer an NFT', async () => {
+    const nft = new Nft(web3)
+    const Factory = new NftFactory(addresses.ERC721Factory, web3)
+    const accounts = await web3.eth.getAccounts()
+    const publisherAccount = accounts[0]
+    const newOwnerAccount = accounts[1].toLowerCase()
+
+    const nftParams: NftCreateData = {
+      name: 'testNFT',
+      symbol: 'TST',
+      templateIndex: 1,
+      tokenURI: '',
+      transferable: true,
+      owner: publisherAccount
+    }
+    const erc20Params: Erc20CreateParams = {
+      templateIndex: 1,
+      cap: '100000',
+      feeAmount: '0',
+      paymentCollector: '0x0000000000000000000000000000000000000000',
+      feeToken: '0x0000000000000000000000000000000000000000',
+      minter: publisherAccount,
+      mpFeeAddress: '0x0000000000000000000000000000000000000000'
+    }
+    const result = await Factory.createNftWithErc20(
+      publisherAccount,
+      nftParams,
+      erc20Params
+    )
+    await sleep(2000)
+    const erc721Address = result.events.NFTCreated.returnValues[0]
+    const datatokenAddress = result.events.TokenCreated.returnValues[0]
+    const graphNftToken = erc721Address.toLowerCase()
+
+    const queryOriginalOwner = {
+      query: `query {
+          nft(id:"${graphNftToken}"){symbol,id,owner}}`
+    }
+    const initialResponse = await fetch(subgraphUrl, {
+      method: 'POST',
+      body: JSON.stringify(queryOriginalOwner)
+    })
+    const initialResult = await initialResponse.json()
+    // Checking original owner account has been set correctly
+    assert(
+      initialResult.data.nft.owner.toLowerCase() ===
+        publisherAccount.toLowerCase()
+    )
+
+    // create the files encrypted string
+    let providerResponse = await ProviderInstance.encrypt(assetUrl, providerUrl)
+    ddo.services[0].files = await providerResponse
+    ddo.services[0].datatokenAddress = datatokenAddress
+    // update ddo and set the right did
+    ddo.nftAddress = erc721Address
+    const chain = await web3.eth.getChainId()
+    ddo.id =
+      'did:op:' +
+      SHA256(web3.utils.toChecksumAddress(erc721Address) + chain.toString(10))
+
+    providerResponse = await ProviderInstance.encrypt(ddo, providerUrl)
+    const encryptedResponse = await providerResponse
+    const metadataHash = getHash(JSON.stringify(ddo))
+    await nft.setMetadata(
+      erc721Address,
+      publisherAccount,
+      0,
+      providerUrl,
+      '',
+      '0x2',
+      encryptedResponse,
+      '0x' + metadataHash
+    )
+    await sleep(2000)
+
+    // Transfer the NFT
+    await nft.transferNft(graphNftToken, publisherAccount, newOwnerAccount)
+    await sleep(2000)
+    const query2 = {
+      query: `query {
+          nft(id:"${graphNftToken}"){symbol,id,owner, transferable}}`
+    }
+    const response = await fetch(subgraphUrl, {
+      method: 'POST',
+      body: JSON.stringify(query2)
+    })
+    const queryResult = await response.json()
+    assert(queryResult.data.nft.owner === newOwnerAccount)
+  })
 })