plaid-python-adapter 0.1

Python library adapter for accessing Plaid APIs

Plaid Python Adapter

This is a python adapter library for accessing Plaid APIs.

Table of Contents

• Environment
• 1. Create Link Token
• 2. Exchange Public Token
• 3. Auth Request
• 4. Identity Request
• 5. Sync Bank Transfer Event
• 6. Initialize Plaid
• Errors

Environment:

Environment Configuration parameters for this library

Parameter Name	Description
PLAID_CLIENT_ID	Plaid Client Id
PLAID_PUBLIC_KEY	Plaid Public Key
PLAID_SECRET	Plaid Secret Key
PLAID_ENV	Plaid Environment to work on. Sample values: 'sandbox','production','development'
PLAID_BASE_URL	The base url of plaid to connect their API. E.G. https://sandbox.plaid.com

Steps to generate access token

Plaid requires the user to authenticate in order to use their APIs. So the steps for accessing the API are as below:

1. Using your UI client, make a request to create_link_token which will return the link token.
2. This link token will be sent to the UI for initializing Plaid. Once Plaid is initialized, we get the public token from plaid server.
3. Then using the public token you need to make a request to exchange_public_token to get the access token. This access token is used for all the remaining api calls.

1.create_link_token(client_user_id,access_token)

Use to get the plaid link token

Mandatory field:
client_user_id : Unique id to identify the client
Optional Field:
access_token : If link token need to be re-initialized with the existing access token.

Response: For response, please refer to below link:
https://plaid.com/docs/api/tokens/#linktokencreate

2.exchange_public_token(public_token)

Use to exchange public token for an access token

Mandatory field:
public_token : public token received from plaid client

Response: For response, please refer to below link:
https://plaid.com/docs/api/tokens/#itempublic_tokenexchange

3.auth_request(access_token,account_ids)

Use to get account details associated with the access_token

Mandatory field:
access_token : Unique access token of the Plaid user
Optional Field:
account_ids : List of account ids for which details needs to be fetched.

Response: For response, please refer to below link:
https://plaid.com/docs/api/products/#authget

4.identity_request(access_token=None,account_ids)

Use to get identity details associated with the access_token

Mandatory field:
access_token : Unique access token of the Plaid user
Optional Field:
account_ids : List of account ids for which details needs to be fetched.

Response: For response, please refer to below link:
https://plaid.com/docs/api/products/#identityget

5.sync_bank_transfer_event(after_id,count)

Use to get bank transfer ACH details

Mandatory field:
after_id : The latest (largest) event_id fetched via the sync endpoint, or 0 initially. Optional Field:
count : The maximum number of bank transfer events to return.
Default: 25
Minimum: 1
Maximum: 25

Response: For response, please refer to below link:
https://plaid.com/docs/api/products/#bank_transfereventsync

6.initialize_plaid(client_name,country_codes,language, products, account_subtypes)

Use to initialize plaid client for specific configuration. All the parameters are optional with the below default values.

Optional Field:
Intialization Parameters for Plaid

Parameter name	Type	Default value	Description
client_name	string	'None'	The name of Plaid Client
country_codes	list	['US']	The country code of Plaid app.
language	string	'en'	The language of Plaid app
products	list	['auth']	The products that are supported by Plaid app.
account_subtypes	list	['checking', 'savings']	The account sub-types returned by Plaid app

Errors

The below list of errors are expected for the API's

Error name	API	Description
PlaidAdapterError	ALL API's	This is the base Error
PlaidAdapterConfigurationError	initialize_plaid	Raised when there is configuration error
PlaidCreateLinkTokenError	create_link_token	Raised when there is error while creating link token
PlaidExchangePublicTokenError	exchange_public_token	Raised when there is error while exchanging public token for an access token
PlaidAuthError	auth_request	Raised when there is error while fetching auth details
PlaidIdentityError	identity_request	Raised when there is error while fetching identity details
PlaidApiInternalServerError	ALL API's	Raised when there is an internal error returned by Plaid server
PlaidBankTransferSyncEventError	sync_bank_transfer_event	Raised when there is an error in fetching bank transfer events

Examples

from plaid_python_adapter.plaid_adapter import PlaidAdapter
from plaid_python_adapter.exceptions import *


def create_link_token():
    response_dict = {}
    plaid_adapter = PlaidAdapter()
    try:
        response = plaid_adapter.create_link_token(client_user_id='<Unique-Id>')
    except PlaidCreateLinkTokenError as err:
        #Handle the error
        pass
    except PlaidApiInternalServerError as err:
        #Handle the error
        pass
    response_dict = {
        'link_token': response.get('link_token'),
        'expiration': response.get('expiration'),
        'request_id': response.get('request_id')
    }
    return response_dict

def exchange_public_token(public_token):
    plaid_adapter = PlaidAdapter()
    try:
        response = plaid_adapter.exchange_public_token(public_token)
    except PlaidExchangePublicTokenError as err:
        #Handle the error
        pass
    except PlaidApiInternalServerError as err:
        #Handle the error
        pass
    access_token = response['access_token']
    return access_token

def auth_request(access_token=None, account_ids=None):
    accounts_details = {}
    plaid_adapter = PlaidAdapter()
    try:
        accounts_details = plaid_adapter.auth_request(access_token, account_ids)
    except PlaidAuthError as err:
        #Handle the error
        pass
    except PlaidApiInternalServerError as err:
        #Handle the error
        pass
    return accounts_details