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 licence.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"
],
"issuer": {
"id": "https://example.com",
"name": "DEMO STORE"
},
"issuanceDate": "2010-01-01T19:23:24Z",
"type": ["VerifiableCredential", "DrivingLicenceCredential"],
"credentialSubject": {
"id": "did:example:SERIAL_NUMBER_123",
"class": [
{
"type": "3",
"effectiveDate": "2010-01-01T19:23:24Z"
},
{
"type": "3A",
"effectiveDate": "2010-01-01T19:23:24Z"
}
]
},
"openAttestationMetadata": {
"template": {
"name": "CUSTOM_TEMPLATE",
"type": "EMBEDDED_RENDERER",
"url": "https://localhost:3000/renderer"
},
"proof": {
"type": "OpenAttestationProofMethod",
"method": "DOCUMENT_STORE",
"value": "0x8bA63EAB43342AAc3AdBB4B827b68Cf4aAE5Caca"
},
"identityProof": {
"type": "DNS-TXT",
"identifier": "example.tradetrust.io"
}
}
}

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 licence.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.

Take note of the value proof.merkleRoot. This is the merkle root to be issued on the document store later.

Issuing document

With the merkle root in proof.merkleRoot, you may following the Issuing Document guide to issued the document on Ethereum.

Verify document

TBD (after oa-cli is updated for verify)

If you are reading this now, you may programmatically verify the document with oa-verify

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