Teller

The official Ruby language bindings for the Teller API.

Installation

Add this line to your application's Gemfile:

gem 'teller'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install teller

Usage

First configure the library for your application

Teller::Config.setup do |c|
    c.certificate  = "/path/to/teller/cert.pem"
    c.private_key  = "/path/to/its/private_key.pem"
    c.access_token = "access-token-from-teller-connect-enrollment"
end

Statically configuring an access token might make sense if you're just building something using your own accounts, but it doesn't if you're building something for thousands of users, which is why you can also set your config when instantiating the client.

client = Teller::Client.new access_token: "test_token_ky6igyqi3qxa4"

During instantiation the client will take whatever static config you've made (if any), and apply config given to the constructor. Config values supplied at instantiation will override conflicting statically configured values.

Now you have your client configured you can use it to explore the API.

account = client.accounts.first
# => #<Teller::Resource type="credit", subtype="credit_card", status="open", name="Platinum Card", links={"transactions"=>"https://api.teller.io/accounts/acc_oiin624kqjrg2mp2ea000/transactions", "self"=>"https://api.teller.io/accounts/acc_oiin624kqjrg2mp2ea000", "balances"=>"https://api.teller.io/accounts/acc_oiin624kqjrg2mp2ea000/balances"}, last_four="7857", institution={"name"=>"Security Credit Union", "id"=>"security_cu"}, id="acc_oiin624kqjrg2mp2ea000", enrollment_id="enr_oiin624rqaojse22oe000", currency="USD">

account.name
# => "Platinum Card"

You can easily load related resources linked to in the "links" section of the API response"

account.balances
# =>  #<Teller::Resource links={"self"=>"https://api.teller.io/accounts/acc_oiin624kqjrg2mp2ea000/balances", "account"=>"https://api.teller.io/accounts/acc_oiin624kqjrg2mp2ea000"}, ledger="4698.93", available="204.12", account_id="acc_oiin624kqjrg2mp2ea000">

account.transactions
# => [#<Teller::Resource type="card_payment", status="pending", running_balance=nil, links={"self"=>"https://api.teller.io/accounts/acc_oiin624kqjrg2mp2ea000/transactions/txn_oj0t0gfqpvj7favgn8000", "account"=>"https://api.teller.io/accounts/acc_oiin624kqjrg2mp2ea000"}, id="txn_oj0t0gfqpvj7favgn8000", details={"processing_status"=>"complete", "counterparty"=>{"type"=>"organization", "name"=>"WILLIAMS-SONOMA"}, "category"=>"shopping"}, description="Williams-Sonoma", date="2023-07-23", amount="96.95", account_id="acc_oiin624kqjrg2mp2ea000">, ...]

You can also fetch arbitrary members of a collection resource

client.accounts.get("acc_oiin624jqjrg2mp2ea000")
# =>  #<Teller::Resource type="depository", subtype="savings", status="open", name="Essential Savings", links={"transactions"=>"https://api.teller.io/accounts/acc_oiin624jqjrg2mp2ea000/transactions", "self"=>"https://api.teller.io/accounts/acc_oiin624jqjrg2mp2ea000", "details"=>"https://api.teller.io/accounts/acc_oiin624jqjrg2mp2ea000/details", "balances"=>"https://api.teller.io/accounts/acc_oiin624jqjrg2mp2ea000/balances"}, last_four="3528", institution={"name"=>"Security Credit Union", "id"=>"security_cu"}, id="acc_oiin624jqjrg2mp2ea000", enrollment_id="enr_oiin624rqaojse22oe000", currency="USD">

The client caches API responses after the first time you invoke a method that requests a given resource. To force the client to redo the request you can call reload

# When called the first time the client will make a request to the Teller API
client.accounts

# On subsequent invocations locally cached data is returned
client.accounts
client.accounts
client.accounts

# Calling reload will always result in a new API request
client.accounts.reload

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/tellerhq/teller-ruby.

License

The gem is available as open source under the terms of the MIT License.