signCredential

Description

The signCredential method allows you to hash credential data and sign it with a private key. This is useful for the issuer to create digital signatures that can verify the authenticity and integrity of data.

Parameters

• options (SignCredentialOptions): An object containing:

  • data (object): The data to be signed, can be any properties and values type that are supported by Leo program

  • hashType (HashAlgorithm): The hashing algorithm to use, type can be imported from zpass-sdk

  • privateKey (string, optional): Optional private key to use for signing. If not provided, uses the SDK instance's private key

Returns

Returns a Promise that resolves to an object containing:

• signature (string): The generated signature

• hash (string): The hash of the data

Example

const { signature, hash } = await zpass.signCredential({
    data: {
      issuer: issuer,
      subject: subject,
      dob: dob,
      nationality: nationality,
      expiry: expiry,
      salt: salt,
    },
    hashType: HashAlgorithm.POSEIDON2,
  });