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json formatting

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Matthias Kretschmann 2021-11-04 12:33:01 +01:00
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content/concepts/did-ddo.md
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@ -89,17 +89,11 @@ A DDO has these required attributes:
In Ocean, the DDO also has: In Ocean, the DDO also has:
- `version` - string, stores version information (example: `v4.0.0`) - `version` - string, stores version information (example: `v4.0.0`)
- `chainId` - integer, stores chainId of the network used - `chainId` - integer, stores chainId of the network the DDO was published to
- `metadata` - stores metadata information [Metadata](#metadata) - `metadata` - stores metadata information [Metadata](#metadata)
- `services` - stores an array of services [Services](#services) - `services` - stores an array of services [Services](#services)
- `credentials` - optional flag, which describes the credentials needed to access a dataset [Credentials](#credentials)
- `files` and `encryptedFiles` - stores file(s) informations [Files](#files) - `files` and `encryptedFiles` - stores file(s) informations [Files](#files)
- `credentials` - optional flag, which describes the credentials needed to access a dataset [Credentials](#credentials)
In addition, Aquarius will add the following objects, which are not taken into account when [DDO hash](#ddo-hash) is calculated:
- `status` - stores status related fields [Status](#status)
- `event` - stores the last event information [Event](#event)
- `stats` - stores several fields for statistics [Stats](#stats)
## Metadata ## Metadata
@ -195,49 +189,43 @@ sha256(
Example: Example:
```json ```json
{ {
{...}, "services": [
"services":[
{ {
"type":"access", "type": "access",
"name":"Download service", "name": "Download service",
"description":"Download service", "description": "Download service",
"datatokenAddress":"0x123", "datatokenAddress": "0x123",
"providerEndpoint":"https://myprovider", "providerEndpoint": "https://myprovider",
"timeout":0 "timeout": 0
}, },
{ {
"type":"compute", "type": "compute",
"name":"Compute service", "name": "Compute service",
"description":"Compute service", "description": "Compute service",
"datatokenAddress":"0x124", "datatokenAddress": "0x124",
"providerEndpoint":"https://myprovider", "providerEndpoint": "https://myprovider",
"timeout":0, "timeout": 0,
"privacy":{ "privacy": {
"allowRawAlgorithm":false, "allowRawAlgorithm": false,
"allowNetworkAccess":true, "allowNetworkAccess": true,
"publisherTrustedAlgorithmPublishers":[ "publisherTrustedAlgorithmPublishers": ["0x234", "0x235"],
"0x234", "publisherTrustedAlgorithms": [
"0x235"
],
"publisherTrustedAlgorithms":[
{ {
"did":"did:op:123", "did": "did:op:123",
"filesChecksum":"100", "filesChecksum": "100",
"containerSectionChecksum":"200" "containerSectionChecksum": "200"
}, },
{ {
"did":"did:op:124", "did": "did:op:124",
"filesChecksum":"110", "filesChecksum": "110",
"containerSectionChecksum":"210" "containerSectionChecksum": "210"
} }
] ]
} }
} }
] ]
} }
``` ```
## Credentials ## Credentials
@ -248,39 +236,34 @@ Consider a medical data use case, where only a credentialed EU researcher can le
This is like going to an R-rated movie, where you can only get in if you show both your movie ticket (datatoken) _and_ some some id showing you're old enough (credential). This is like going to an R-rated movie, where you can only get in if you show both your movie ticket (datatoken) _and_ some some id showing you're old enough (credential).
Only credentials that can be proven are supported. This includes Ethereum public addresses, and (in the future) W3C Verifiable Credentials and more. Only credentials that can be proven are supported. This includes Ethereum public addresses, and (in the future) [W3C Verifiable Credentials]() and more.
Ocean also supports `"deny"` credentials: if a consumer has any of these credentials, they cannot access the resource. Ocean also supports `"deny"` credentials: if a consumer has any of these credentials, they cannot access the resource.
Here's an example object with both `"allow"` and `"deny"` entries. Here's an example object with both `"allow"` and `"deny"` entries:
```json ```json
{ {
{...}, "credentials": {
"credentials":{ "allow": [
"allow":[
{ {
"type":"address", "type": "address",
"values":[ "values": ["0x123", "0x456"]
"0x123",
"0x456"
]
} }
], ],
"deny":[ "deny": [
{ {
"type":"address", "type": "address",
"values":[ "values": ["0x2222", "0x333"]
"0x2222",
"0x333"
]
} }
] ]
} }
} }
``` ```
For future usage, we can extend that with different credentials types. Example: For future usage, we can extend that with different credentials types.
Example:
```json ```json
{ {
@ -314,15 +297,14 @@ Example:
```json ```json
{ {
{..}, "files": {
files:{
"files": [ "files": [
{ {
"contentLength": "3975", "contentLength": "3975",
"contentType": "text/csv" "contentType": "text/csv"
} }
], ],
"encryptedFiles": "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", "encryptedFiles": "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"
} }
} }
``` ```
@ -379,41 +361,47 @@ The `status` object contains the following attributes:
```json ```json
{ {
{...},
"status": { "status": {
"state": 0, "state": 0,
"isListed": true, "isListed": true,
"isOrderDisabled": false "isOrderDisabled": false
} }
}
``` ```
### Events ### Events
The `events` section contains informations about the transactions that created or updated the DDO The `events` section contains informations about the transactions that created or updated the DDO.
Example:
```json ```json
{ {
{...}, "events": [
"events": [{ {
"txid": "0x8d127de58509be5dfac600792ad24cc9164921571d168bff2f123c7f1cb4b11c", "txid": "0x8d127de58509be5dfac600792ad24cc9164921571d168bff2f123c7f1cb4b11c",
"blockNo": 12831214, "blockNo": 12831214,
"from": "0xAcca11dbeD4F863Bb3bC2336D3CE5BAC52aa1f83", "from": "0xAcca11dbeD4F863Bb3bC2336D3CE5BAC52aa1f83",
"contract": "0x1a4b70d8c9DcA47cD6D0Fb3c52BB8634CA1C0Fdf", "contract": "0x1a4b70d8c9DcA47cD6D0Fb3c52BB8634CA1C0Fdf",
"update": false, "update": false,
"chainId": 1, "chainId": 1
}] }
]
}
``` ```
### Stats ### Stats
The `stats` section contains different statics fields. The `stats` section contains different statics fields.
Example:
```json ```json
{ {
{...},
"stats": { "stats": {
"consumes":4 "consumes": 4
} }
}
``` ```
## Full Enhanced DDO Example: ## Full Enhanced DDO Example:
@ -447,7 +435,7 @@ The `stats` section contains different statics fields.
"name": "Download service", "name": "Download service",
"description": "Download service", "description": "Download service",
"datatokenAddress": "0x123", "datatokenAddress": "0x123",
"providerEndpoint": "https://myprovider", "providerEndpoint": "https://myprovider.com",
"timeout": 0 "timeout": 0
} }
], ],