Tutorial: https://0xpolygonid.github.io/tutorials/verifier/on-chain-verification/overview/

This tutorial uses Hardhat as a development environment and Polygon Mumbai testnet as the network.

1. Download the Polygon ID mobile app on the Google Play or Apple app store

2. Open the app and set a pin for security

3. Follow the Issue a Polygon ID claim doc to issue yourself a KYC Age Credential attesting your date of birth.

1. Create a .env file in the root of this repo. Copy in .env.sample to add keys touch .env

2. Install dependencies npm i

3. Compile smart contracts npx hardhat compile

4. Deploy smart contracts npx hardhat run --network mumbai scripts/deploy.js

• Drop Token deployed to: 0x34cb10Ec8b300821943112c73e81191784c19C93
• ERC20Verifier contract hash: 0xf7d67448132bfBdBE496Ef1633fD62f0D342f9a8
• FactoryContract hash: 0xAC70A6c866328e6283A787FDE99B6d8860cB517D

5. Update the ERC20VerifierAddress variable in scripts/set-request.js with your deployed contract address

6. Run set-request to send the zk request to the smart contract npx hardhat run --network matic scripts/deploy.js

   • Successful tx means the age query has been set up: https://mumbai.polygonscan.com/tx/0xd04afd57eb3c0388525026a15578802289bce06d78060069f072540e7d9dd1ca

1. Design a proof request (see my example in qrValueProofRequestExample.json) and more info in the docs: Query Based Requests

   • Update the contract_address field to your deployed contract address

2. Create a frontend with a QR code to the proof request. Codesandbox example A user should be able to scan the QR code from the Polygon ID app and trustlessly prove that they are old enough to claim the ERC20 airdrop without revealing their actual birthday.