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Overview of Resource creation on cheqd

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Client app -> cheqd ledger: [1] create new DID and associated DIDDoc

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note:

Create a normal DID and DID Document on cheqd ledger. 

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did:cheqd:mainnet:**4611539a-f341-4324-9176-d1078bbd327a**

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The unique identifier from this DID is also the _Resource Collection ID_

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cheqd ledger -> cheqd ledger: [2] Store DID Document

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Client app -> cheqd ledger: [3] Create resource associated with DID Document

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note:

**Resource parameters provided by Client App**

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1. _Collection ID_ (same as Step 1): **4611539a-f341-4324-9176-d1078bbd327a**

2. _Resource ID_ (effectively a unique version number): **559d299a-9bca-4e4e-9b57-45c1e07414af**

3. _Resource Name_ (unique name to link versions together): e.g. **PassportSchema**

4. _Resource Type_ (the type of resource being created, also used to link versions together: e.g. **SCHEMA**

5. _Resource Contents_: passed as file

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**Resource parameters provided by ledger**

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1. _Media Type_ (adopted from the file extension): e.g. `application/json`

2. _Created_: Date of resource creation

3. _Checksum_: SHA-256 checksum of resource contents

4. _Previous Version ID_: `null` for first resource version

5. _Next Version ID_: `null` for first resource version

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cheqd ledger -> cheqd ledger: [4] DIDDoc metadata is updated to reference associated resource metadata

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note:

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The resource metadata is stored within the _DID Document Metadata_. The syntax of the resource metadata is as follows:

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```

"linkedResourceMetadata": [

  {

    "resourceURI": "did:cheqd:mainnet:4611539a-f341-4324-9176-d1078bbd327a/resources/559d299a-9bca-4e4e-9b57-45c1e07414af",

    "resourceCollectionId": "4611539a-f341-4324-9176-d1078bbd327a",

    "resourceId": "559d299a-9bca-4e4e-9b57-45c1e07414af",

    "resourceName": "PassportSchema",

    "resourceType": "SCHEMA",

    "mediaType": "application/json",

    "created": "2022-07-19T08:40:00Z",

    "checksum": "7b2022636f6e74656e74223a202274657374206461746122207d0ae3b0c44298",

    "previousVersionId": null,

    "nextVersionId": null

  }

]

```

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Client app -> cheqd ledger: [5] **_Optional_** update initial DID Doc to reference resource in `service` section

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note:

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DID unique identifier: did:cheqd:mainnet:**4611539a-f341-4324-9176-d1078bbd327a**

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DID Document service section:

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```

{

  "service": [{

    "id": "did:cheqd:mainnet:4611539a-f341-4324-9176-d1078bbd327a#PassportSchema"

    "type": "LinkedResource"

    "serviceEndpoint": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:mainnet:4611539a-f341-4324-9176-d1078bbd327a/resources/559d299a-9bca-4e4e-9b57-45c1e07414af"

  }]

}

```

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Where:

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1. _Resource Name_: #**PassportSchema**

2. _Service Type_: **LinkedResource**

3. _Base URL_: `https://resolver.cheqd.net/1.0/identifiers/`

4. _Resource Collection ID_: `did:cheqd:mainnet:`**4611539a-f341-4324-9176-d1078bbd327a**

5. _Method Specific Path_: `/resources/`

6. _Resource ID_: **559d299a-9bca-4e4e-9b57-45c1e07414af**