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Status
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titlestartedfor review

Approver

Pavel Shkadzko

Table of Contents

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Communicate with Gini Pay API using client credentials (basic authentication) from a trusted device that is your trusted backend. A derived user is automatically created if it doesn't exist already.

...

Code Block
languagejson
curl -v -H 'Accept: application/vnd.gini.v1+json'
    -u 'client-id:client-secret'
    -H 'X-User-Identifier: user_hash_123'
    https://pay-api.gini.net/documents

//example response

{
  "documents": [
    {...},
    {...},
    ...
  ]
}

...

Communication from an untrusted device using a derived user

To communicate with Gini Pay API from untrusted devices, acquire a token from Gini Pay API for the user and hand it over to the untrusted device. The user is derived/created from X-User-Identifier header. The value is up to you, often a stable hash of your internal user identifier.

...

Code Block
languagejson
//Acquire a token and hand it over to the untrusted device

curl -v -X POST
        -H 'X-User-Identifier: user_hash_123'
        -H 'Accept: application/vnd.gini.v1+json'
        -u 'client-id:secret' 'https://pay-api.gini.net/login'

//example response

{
  "access_Token": "S+YXT+XneST13aqoBRBgBiw6Quk=",
  "token_type": "bearer",
  "expires_in": 43199
}

//Query API with the acquired token

curl -X GET -i https://pay-api.gini.net/documents
     -H 'Authorization: BEARER S+YXT+XneST13aqoBRBgBiw6Quk='
     -H 'Accept: application/vnd.gini.v1+json'

...

Communication from both trusted and untrusted devices using a derived user

When you communicate with our API from a trusted device using client credentials (option 1), a derived user is automatically created for a given X-User-Identifier when it's specified for the first time. From then on, the derived user stays fixed for this client ID and X-User-Identifier. You can also acquire an access token for this user, so it can be used by an untrusted device. This scenario is valid when you have both trusted and untrusted devices communicating with our API and you don't want client credentials stored on an untrusted device.

...

Code Block
languagejson
//Derived user is automatically created for user_hash_789 first time client uses it from a trusted device

curl -v -H 'Accept: application/vnd.gini.v1+json'
    -u 'client-id:client-secret'
    -H 'X-User-Identifier: user_hash_789'
    https://pay-api.gini.net/documents

//Trusted device can now acquire the token for an already existing user_hash_789

curl -v -X POST
        -H 'X-User-Identifier: user_hash_789'
        -H 'Accept: application/vnd.gini.v1+json'
        -u 'client-id:secret' 'https://pay-api.gini.net/login'

//example response

{
  "access_Token": "G+YXT+XneST13aqoBRBgBiw6Qza=",
  "token_type": "bearer",
  "expires_in": 43199
}

//Hand the acquired access token over to an untrusted device so that it can query API

curl -X GET -i https://pay-api.gini.net/documents
     -H 'Authorization: BEARER G+YXT+XneST13aqoBRBgBiw6Qza='
     -H 'Accept: application/vnd.gini.v1+json'

...

Communication from an untrusted device using an anonymous user

...

Access tokens expire. So the last two steps should be repeated to refresh the token and hand it over to the untrusted device for use.

...

Code Block
//Step 1. Get client token from a trusted device

curl -v -H 'Accept: application/json'
    -u 'client-id:client-secret'
    'https://user.gini.net/oauth/token?grant_type=client_credentials'

//example response

{
  "access_token":"6c470ffa-abf1-41aa-b866-cd3be0ee84f4",
  "token_type":"bearer",
  "expires_in":3599
}

//Step 2. Use the client token above to create user with arbitrary username and password (user usually identifies the physical device e.g mobile phone)

curl -v -X POST --data '{"email":"random@example.org", "password":"geheim"}'
    -H 'Content-Type: application/json'
    -H 'Accept: application/json'
    -H 'Authorization: BEARER 6c470ffa-abf1-41aa-b866-cd3be0ee84f4'
    'https://user.gini.net/api/users'

//example response

HTTP/1.1 201 Created
Location: https://user.gini.net/api/users/6407244f-9edf-4119-8641-be18c39226d8
Content-Length: 0

//Step 3. Authenticate on behalf of the user using client credentials and acquire the access token

curl -v -X POST --data-urlencode 'username=random@example.org'
    --data-urlencode 'password=geheim'
    -H 'Content-Type: application/x-www-form-urlencoded'
    -H 'Accept: application/json' -u 'client-id:client-secret'
    'https://user.gini.net/oauth/token?grant_type=password'

//example response

{
  "access_token":"6c470ffa-abf1-41aa-b866-cd3be0ee84f4",
  "token_type":"bearer",
  "expires_in":3599
}

//Step 4. Communicate with the API from an untrusted device with the acquired access token

curl -X GET -i https://pay-api.gini.net/documents
     -H 'Authorization: BEARER 6c470ffa-abf1-41aa-b866-cd3be0ee84f4'
     -H 'Accept: application/vnd.gini.v1+json'