FAQ

How can I get HMT tokens on testnet?

You can use Faucet: https://faucet.humanprotocol.org

How do I generate an ES256 key pair?

To generate an ES256 key pair, first create a private key:

openssl ecparam -name prime256v1 -genkey -noout -out jwt-private.pem

You can choose any path and name instead of jwt-private.pem. When you have the private key, use it to generate a public key:

openssl ec -in jwt-private.pem -pubout -out jwt-public.pem

How do I generate a PGP key pair?

Use the gpg wizard:

gpg --full-generate-key

When going through the process:

• choose the RSA and RSA or ECC (recommended) key type to encrypt/decrypt messages
• choose 0 expiration (key does not expire) so there will be no need to rotate keys
• store your passphrase safely—you will need it later

Once you have your keys generated, export them to text files:

To export public key

gpg --export --armor [email protected] > public_key.asc

To export private key

gpg --export-secret-keys --armor [email protected] > private_key.asc

How can I pass captcha verification for API calls in a local environment?

For local or developer environments, hCaptcha test keys are used. You can find a response token that corresponds to the environment sitekey and use it in API requests.

How do I clear the DNS cache on my PC?

macOS:

sudo killall -HUP mDNSResponder

Linux:

sudo systemctl restart systemd-resolved

Windows:

ipconfig /flushdns

How can I pass Identify Verification for workers without setting up an Identity Verification provider?

To synthetically pass Identity Verification, connect to the Reputation Oracle database and insert an item like the example below into the kycs table:

{
  "id": <user-id-to-approve-kyc>, // unique kyc record id
  "created_at": "YYYY-MM-DD HH:MM:SS.000000 +00:00",
  "updated_at": "YYYY-MM-DD HH:MM:SS.000000 +00:00",
  "session_id": <kyc-sesion-id>, // unique
  "status": "approved",
  "message": null,
  "user_id": <user-id-to-approve-kyc>,
  "country": null,
  "url": <kyc-verification-url> // unique
}

Info

If you are already logged in, re-login or refresh your token to get the updated KYC status.

How can I set up KV Store values for an oracle?

You can use this sample Node.js script to set up an oracle's KV Store:

/* eslint-disable no-console */
import { ChainId, KVStoreClient, KVStoreKeys, KVStoreUtils, Role } from '@human-protocol/sdk';
import { Wallet, JsonRpcProvider } from 'ethers';

const rpcUrl = 'https://rpc-amoy.polygon.technology';
const chainId = ChainId.POLYGON_AMOY;
const address = 'oracle_address';
const privateKey = 'oracle_private_key';

async function setupOracleKV() {
  const provider = new JsonRpcProvider(rpcUrl);
  const signer = new Wallet(privateKey, provider);
  const kvStoreClient = await KVStoreClient.build(signer);

  // Pick oracle role from pre-defined values
  const role = Role.ExchangeOracle;
  // Fee percentage: valid integer from 0
  const fee = 1;
  // Full Oracle URL
  const url = 'http://exchange-oracle:5000';
  // Webhook url as per standard
  const webhookUrl = `${url}/webhook`;
  // Job types supported by oracle
  const jobTypes = 'image_points,image_boxes,image_boxes_from_points,image_skeletons_from_boxes,image_polygons';

  await kvStoreClient.setBulk(
    [
      KVStoreKeys.role,
      KVStoreKeys.fee,
      KVStoreKeys.url,
      KVStoreKeys.webhookUrl,
      KVStoreKeys.jobTypes,
    ],
    [
      role,
      `${fee}`,
      url,
      webhookUrl,
      jobTypes,
    ],
  );

  // Publicly accessible url where PGP public key is stored
  const pgpPublicKeyUrl = 'http://minio:9000/exchange-oracle/pgp-public-key';
  await kvStoreClient.setFileUrlAndHash(
    pgpPublicKeyUrl,
    KVStoreKeys.publicKey
  );

  /**
  * These keys are valid only for Exchange Oracle
  * in case it requires extra registration step
  */
  await kvStoreClient.setBulk([
    KVStoreKeys.registrationNeeded,
    KVStoreKeys.registrationInstructions,
  ], [
    'true',
    'http://how-to-register.url'
  ]);

  const result = await KVStoreUtils.getKVStoreData(
    chainId,
    address
  );
  console.log('Oracle KV:', result);
}

(async () => {
  try {
    await setupOracleKV();
    process.exit(0);
  } catch (error) {
    console.log('Failed to set up oracle KV', error);
    process.exit(1);
  }
})();

or write a similar script in Python using the Python SDK.

What are the default Hardhat local node accounts?

Account #0: 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266
Private Key: 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80

Account #1: 0x70997970C51812dc3A010C7d01b50e0d17dc79C8
Private Key: 0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d

Account #2: 0x3C44CdDdB6a900fa2b585dd299e03d12FA4293BC
Private Key: 0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a

Account #3: 0x90F79bf6EB2c4f870365E785982E1f101E93b906
Private Key: 0x7c852118294e51e653712a81e05800f419141751be58f605c371e15141b007a6

Account #4: 0x15d34AAf54267DB7D7c367839AAf71A00a2C6A65
Private Key: 0x47e179ec197488593b187f80a00eb0da91f1b9d0b13f8733639f19c30a34926a

Account #5: 0x9965507D1a55bcC2695C58ba16FB37d819B0A4dc
Private Key: 0x8b3a350cf5c34c9194ca85829a2df0ec3153be0318b5e2d3348e872092edffba

Account #6: 0x976EA74026E726554dB657fA54763abd0C3a0aa9
Private Key: 0x92db14e403b83dfe3df233f83dfa3a0d7096f21ca9b0d6d6b8d88b2b4ec1564e

Account #7: 0x14dC79964da2C08b23698B3D3cc7Ca32193d9955
Private Key: 0x4bbbf85ce3377467afe5d46f804f221813b2bb87f24d81f60f1fcdbf7cbf4356

Account #8: 0x23618e81E3f5cdF7f54C3d65f7FBc0aBf5B21E8f
Private Key: 0xdbda1821b80551c9d65939329250298aa3472ba22feea921c0cf5d620ea67b97

Account #9: 0xa0Ee7A142d267C1f36714E4a8F75612F20a79720
Private Key: 0x2a871d0798f97d79848a013d4936a73bf4cc922c825d33c1cf7073dff6d409c6

Account #10: 0xBcd4042DE499D14e55001CcbB24a551F3b954096
Private Key: 0xf214f2b2cd398c806f84e317254e0f0b801d0643303237d97a22a48e01628897

Account #11: 0x71bE63f3384f5fb98995898A86B02Fb2426c5788
Private Key: 0x701b615bbdfb9de65240bc28bd21bbc0d996645a3dd57e7b12bc2bdf6f192c82

Account #12: 0xFABB0ac9d68B0B445fB7357272Ff202C5651694a
Private Key: 0xa267530f49f8280200edf313ee7af6b827f2a8bce2897751d06a843f644967b1

Account #13: 0x1CBd3b2770909D4e10f157cABC84C7264073C9Ec
Private Key: 0x47c99abed3324a2707c28affff1267e45918ec8c3f20b8aa892e8b065d2942dd

Account #14: 0xdF3e18d64BC6A983f673Ab319CCaE4f1a57C7097
Private Key: 0xc526ee95bf44d8fc405a158bb884d9d1238d99f0612e9f33d006bb0789009aaa

Account #15: 0xcd3B766CCDd6AE721141F452C550Ca635964ce71
Private Key: 0x8166f546bab6da521a8369cab06c5d2b9e46670292d85c875ee9ec20e84ffb61

Account #16: 0x2546BcD3c84621e976D8185a91A922aE77ECEc30
Private Key: 0xea6c44ac03bff858b476bba40716402b03e41b8e97e276d1baec7c37d42484a0

Account #17: 0xbDA5747bFD65F08deb54cb465eB87D40e51B197E
Private Key: 0x689af8efa8c651a91ad287602527f3af2fe9f6501a7ac4b061667b5a93e037fd

Account #18: 0xdD2FD4581271e230360230F9337D5c0430Bf44C0
Private Key: 0xde9be858da4a475276426320d5e9262ecfc3ba460bfac56360bfa6c4c28b4ee0

Account #19: 0x8626f6940E2eb28930eFb4CeF49B2d1F2C9C1199
Private Key: 0xdf57089febbacf7ba0bc227dafbffa9fc08a93fdc68e1e42411a14efcf23656e