Quick Start (V3 Beta)

In this guide, we will attempt to issue an driving license in the OpenAttestation Version 3 format. We will be using the document store to issue this document with DNS-TXT as the method to identify the issuer using DNS.

The document will not be rendered yet as we have yet to create demo renderer

For a full range of documents (beside document store + DNS-TXT), you may look at the different types of document supported here

Document Store Setup

If you have not already deployed a document store, you may do so by following the guides listed below:

  1. Creating a wallet
  2. Deploying Document Store
  3. Configuring DNS

Creating Raw Document

We will now create the data for the driving license. Create a file license.json with the following data:

{
"@context": [
"https://www.w3.org/2018/credentials/v1",
"https://schemata.openattestation.com/com/openattestation/1.0/DrivingLicenceCredential.json",
"https://schemata.openattestation.com/com/openattestation/1.0/OpenAttestation.v3.json",
"https://schemata.openattestation.com/com/openattestation/1.0/CustomContext.json"
],
"reference": "SERIAL_NUMBER_123",
"name": "Republic of Singapore Driving Licence",
"issuanceDate": "2010-01-01T19:23:24Z",
"validFrom": "2010-01-01T19:23:24Z",
"issuer": { "id": "https://example.com", "name": "DEMO STORE", "type": "OpenAttestationIssuer" },
"type": ["VerifiableCredential", "DrivingLicenceCredential", "OpenAttestationCredential"],
"credentialSubject": {
"id": "did:example:JOHN_DOE_DID",
"licenseNumber": "S1234567a",
"birthDate": "1977-02-22",
"name": "John Doe",
"class": [
{ "type": "3", "effectiveDate": "2010-01-01T19:23:24Z" },
{ "type": "3A", "effectiveDate": "2010-01-01T19:23:24Z" }
]
},
"openAttestationMetadata": {
"template": {
"name": "DRIVING_LICENSE",
"type": "EMBEDDED_RENDERER",
"url": "https://tutorial-renderer.openattestation.com"
},
"proof": {
"type": "OpenAttestationProofMethod",
"method": "DID",
"value": "did:ethr:0xE712878f6E8d5d4F9e87E10DA604F9cB564C9a89",
"revocation": {
"type": "NONE"
}
},
"identityProof": {
"type": "DNS-DID",
"identifier": "example.tradetrust.io"
}
},
"attachments": [{ "fileName": "sample.pdf", "mimeType": "application/pdf", "data": "BASE64_ENCODED_FILE" }]
}

You will need to replace the following values:

openAttestationMetadata.proof.value

Replace this with the address of the document store deployed in the step Deploying Document Store

openAttestationMetadata.identityProof.identifier

Replace this with the domain where the TXT record has been inserted in the step Configuring DNS

Wrapping the Document

With licence.json saved, run the following command after the CLI is installed:

open-attestation wrap license.json --of wrapped.json --oav3

The will wrap the original document and append additional data required by OpenAttestation to the proof key at the root of the document.

Issuing document

Since we are using the DID method to issue the document, we can simply sign the document with the private key corresponding to issuing DID configured.

In the example we will sign with the did did:ethr:0xE712878f6E8d5d4F9e87E10DA604F9cB564C9a89 but you will have to use your DID to sign your document.

Run the following command to sign the document:

open-attestation sign wrapped.json --output-dir signed --public-key did:ethr:0xE712878f6E8d5d4F9e87E10DA604F9cB564C9a89#controller --key 0x0000000000000000000000000000000000000000000000000000000000000000000

Replace both public key and private key with your DID's

Verify document

Now you will see a file wrapped.json created in the folder signed. You may verify the document with the following command:

open-attestation verify -d signed/wrapped.json

Upon successful verification you will see the output:

… awaiting Verifying signed/wrapped.json
✔ success The document is valid

Web verification one tradetrust.io and opencerts.io are currently in the works. These documents may not be verified on the site yet.

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