smart-contract

Polygon ID

On-chain verification is used for verifying Proof of Membership in School and Company.

Subgraph

Query JobListingNFT contract Endpoint: https://api.studio.thegraph.com/query/60400/chainlinkhackathon/v0.0.1

Chainlink CCIP

Cross Chain minting NFT for job applicant.

ContractWorkflow

1. Create a new organisation:

   • Call Deployer.deployOrganisation():

     uint256 organisationType: 1 for company, 2 for school
     string memory name: name of organisation
     string memory symbol: symbol of organisation's token
     address operator: operator of the organisation
     string memory imageURL_: imageURL of organisation
     string memory description_: description of organisation
     

   • Example
   • Fetch the address from first log, second topic (topics[1]): it will be 0x61457e7506a55ac36fb5f17600b4b1eb529cdf8a(remove redundant 0s) in this transaction log

2. Apply for a job:

• Attach OrganisationCore contract with the address of the company (fetched from previous step)
• Call OrganisationCore.ApplyJob() and select the destinationChain you want the NFT to get minted for you as a proof of applicant.

uint64 destinationChainSelector: chainlink CCIP destination selector
bool isPayLink: set to true
uint256 listingID: listing ID of the job
string memory profileURL: profileURL of the candidate

• Example
• More detail in CCIP explorer
• Average bridging time takes about 10 mins
• JobListingNFT successfully minted transaction

3. User want to prove one's membership in the organisation

• User has to already hold the Membership credential in their polygon ID wallet.

  • Issue credential for user by importing the Membership JSON schema URL in https://user-ui:password-ui@issuer-ui.polygonid.me/schemas

• Once the user has the credential, they can proceed to scan requestQR (example: frontend/index.js). It will create and send proof to ProofOfMembershipVerifier contract. If success, user will be minted an organisation's NFT.

Scripts

1. scripts/createNewOrganisation.js: Script to create new organisation and fetch address from log event.
2. scripts/applyNewJob.js: script to apply new job and mint joblistingNFT cross-chain using CCIP.
3. scripts/queryJobListingNFT.js: script to query subgraph endpoint for newApplicant event from JobListingNFT contract on destination chain.

Deployment

Mumbai (Source)

1. SourceChainMinter: 0x16B43E348e0A19E9196ae79D172aDC52B3Aa3E20
2. ProofOfMembershipVerifier: 0x171C1161bCde7adB32a9Ca92c412d39bE6F97C59
3. Deployer: 0xBcDd7fcD1fFa1AFC4783dbf345E541BC46dEE3C8

Sepolia (Destination)

1. DestinationMinter: 0x3a3C3F10db0B5DF58C29Cc4C6E008A692e321b50
2. JobListingNFT.sol: 0x6aF3907Fcbe8eC279878BAFc5861D756B36f9710

Avalanche Fuji (Destination)

1. DestinationMinter: 0xcF7E187Ed1090B9CE8E4a7266B5309d839E85648
2. JobListingNFT.sol: 0x6be796cb66CdB3566b8AbebA2C516CbDF93fE831 Sample cross chain NFT minted: https://ccip.chain.link/msg/0x93cf3863777ab57c532ca201b4e44ee363d1b7413bd30af4065884ccae5b054f

Optimism Goerli (Destination)

1. DestinationMinter: 0x1ff52708d610b1d17f0830f036e992677cdc508a
2. JobListingNFT.sol: 0x03399fac4e4ef2f17e8f464808dd30a1eaaa8997 Sample cross chain NFT minted: https://ccip.chain.link/msg/0x35f0b23a97910a7702936be3b2f26d44950bb3a9dfad6534c0bdeb6f1a689a44