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SDK to facilitate Elixir integrations with the Stark Infra API

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Stark Infra Elixir SDK Beta

Welcome to the Stark Infra Elixir SDK! This tool is made for Elixir developers who want to easily integrate with our API. This SDK version is compatible with the Stark Infra API v2.

Introduction

Index

Supported Elixir Versions

This library supports Elixir versions 1.9+.

Stark Infra API documentation

Feel free to take a look at our API docs.

Versioning

This project adheres to the following versioning pattern:

Given a version number MAJOR.MINOR.PATCH, increment:

  • MAJOR version when the API version is incremented. This may include backwards incompatible changes;
  • MINOR version when breaking changes are introduced OR new functionalities are added in a backwards compatible manner;
  • PATCH version when backwards compatible bug fixes are implemented.

Setup

1. Install our SDK

To install the package with mix, add this to your deps and run mix deps.get:

def deps do
  [
  {:starkinfra, "~> 0.1.0"}
  ]
end

2. Create your Private and Public Keys

We use ECDSA. That means you need to generate a secp256k1 private key to sign your requests to our API, and register your public key with us so we can validate those requests.

You can use one of following methods:

2.1. Check out the options in our tutorial.

2.2. Use our SDK:

{private_key, public_key} = StarkInfra.Key.create()

# or, to also save .pem files in a specific path
{private_key, public_key} = StarkInfra.Key.create("file/keys/")

Note: When you are creating a new Project, it is recommended that you create the keys inside the infrastructure that will use it, in order to avoid risky internet transmissions of your private-key. Then you can export the public-key alone to the computer where it will be used in the new Project creation.

3. Register your user credentials

You can interact directly with our API using two types of users: Projects and Organizations.

  • Projects are workspace-specific users, that is, they are bound to the workspaces they are created in. One workspace can have multiple Projects.
  • Organizations are general users that control your entire organization. They can control all your Workspaces and even create new ones. The Organization is bound to your company's tax ID only. Since this user is unique in your entire organization, only one credential can be linked to it.

3.1. To create a Project in Sandbox:

3.1.1. Log into StarkInfra Sandbox

3.1.2. Go to Menu > Integrations

3.1.3. Click on the "New Project" button

3.1.4. Create a Project: Give it a name and upload the public key you created in section 2

3.1.5. After creating the Project, get its Project ID

3.1.6. Use the Project ID and private key to create the struct below:

# Get your private key from an environment variable or an encrypted database.
# This is only an example of a private key content. You should use your own key.
private_key_content = "
-----BEGIN EC PARAMETERS-----
BgUrgQQACg==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MHQCAQEEIMCwW74H6egQkTiz87WDvLNm7fK/cA+ctA2vg/bbHx3woAcGBSuBBAAK
oUQDQgAE0iaeEHEgr3oTbCfh8U2L+r7zoaeOX964xaAnND5jATGpD/tHec6Oe9U1
IF16ZoTVt1FzZ8WkYQ3XomRD4HS13A==
-----END EC PRIVATE KEY-----
"

project = StarkInfra.project(
  id: "5671398416568321",
  environment: :sandbox,
  private_key: private_key_content
)

3.2. To create Organization credentials in Sandbox:

3.2.1. Log into Starkinfra Sandbox

3.2.2. Go to Menu > Integrations

3.2.3. Click on the "Organization public key" button

3.2.4. Upload the public key you created in section 2 (only a legal representative of the organization can upload the public key)

3.2.5. Click on your profile picture and then on the "Organization" menu to get the Organization ID

3.2.6. Use the Organization ID and private key to create the struct below:

# Get your private key from an environment variable or an encrypted database.
# This is only an example of a private key content. You should use your own key.
private_key_content = """
-----BEGIN EC PARAMETERS-----
BgUrgQQACg==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MHQCAQEEIMCwW74H6egQkTiz87WDvLNm7fK/cA+ctA2vg/bbHx3woAcGBSuBBAAK
oUQDQgAE0iaeEHEgr3oTbCfh8U2L+r7zoaeOX964xaAnND5jATGpD/tHec6Oe9U1
IF16ZoTVt1FzZ8WkYQ3XomRD4HS13A==
-----END EC PRIVATE KEY-----
"""

organization = StarkInfra.Organization(
  environment: "sandbox",
  id: "5656565656565656",
  private_key: private_key_content,
  workspace_id: nil,  # You only need to set the workspace_id when you are operating a specific workspace_id
)

NOTE 1: Never hard-code your private key. Get it from an environment variable or an encrypted database.

NOTE 2: We support 'sandbox' and 'production' as environments.

NOTE 3: The credentials you registered in sandbox do not exist in production and vice versa.

4. Setting up the user

There are three kinds of users that can access our API: Organization, Project and Member.

  • Project and Organization are designed for integrations and are the ones meant for our SDKs.
  • Member is the one you use when you log into our webpage with your e-mail.

There are two ways to inform the user to the SDK:

4.1 Passing the user as argument in all functions using the user keyword:

balance = StarkInfra.PixBalance.get!(user: project)  # or organization

4.2 Set it as a default user in the config/config.exs file:

import Config

config :starkinfra,
  project: [
    environment: :sandbox,
    id: "9999999999999999",
    private_key: private_key_content
  ]

or

import Config

config :starkinfra,
  organization: [
    environment: :sandbox,
    id: "9999999999999999",
    private_key: private_key_content,
    workspace_id: "8888888888888888" # or nil
  ]

Just select the way of passing the user that is more convenient to you. On all following examples we will assume a default user has been set in the configs.

5. Setting up the error language

The error language can also be set in the config/config.exs file:

import Config

config :starkinfra,
  language: "en-US"

Language options are "en-US" for english and "pt-BR" for brazilian portuguese. English is default

6. Resource listing and manual pagination

Almost all SDK resources provide a query and a page function.

  • The query function provides a straight forward way to efficiently iterate through all results that match the filters you inform, seamlessly retrieving the next batch of elements from the API only when you reach the end of the current batch. If you are not worried about data volume or processing time, this is the way to go.
notes = StarkInfra.CreditNote.query!(
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1)
) 
|> Enum.take(10) 
|> IO.inspect
  • The page function gives you full control over the API pagination. With each function call, you receive up to 100 results and the cursor to retrieve the next batch of elements. This allows you to stop your queries and pick up from where you left off whenever it is convenient. When there are no more elements to be retrieved, the returned cursor will be nil.
defmodule CursorRecursion do
  def get!(iterations \\ 1, cursor \\ nil)  

  def get!(iterations, cursor) when iterations > 0 do
  {new_cursor, new_entities} = StarkInfra.CreditNote.page!(cursor: cursor)
  new_entities ++ get!(
    iterations - 1,
    new_cursor
  )
  end

  def get!(iterations, _cursor) do
    []
  end
end

transactions = CursorRecursion.get!(3) 
|> IO.inspect

To simplify the following SDK examples, we will only use the query function, but feel free to use page instead.

Testing in Sandbox

Your initial balance is zero. For many operations in Stark Infra, you'll need funds in your account, which can be added to your balance by creating an StarkBank.Invoice or a StarkBank.Boleto.

In the Sandbox environment, most of the created Invoices and Boletos will be automatically paid, so there's nothing else you need to do to add funds to your account. Just create a few Invoices and wait around a bit.

In Production, you (or one of your clients) will need to actually pay this Invoice or Boleto for the value to be credited to your account.

Usage

Here are a few examples on how to use the SDK.

Here are a few examples on how to use the SDK. If you have any doubts, use the built-in h() function to get more info on the desired functionality (for example: StarkInfra.CreditNote |> h)

Note: Almost all SDK functions also provide a bang (!) version. To simplify the examples, they will be used the most throughout this README.

Issuing

Query IssuingBins

To take a look at the sub-issuer BINs available to you, just run the following:

StarkInfra.IssuingBin.query!() 
|> Enum.take(10) 
|> IO.inspect

This will tell which card products and card number prefixes you have at your disposal.

Create IssuingHolders

You can create card holders to which your cards will be bound. They support spending rules that will apply to all underlying cards.

StarkInfra.IssuingHolder.create!(
  [
    %StarkInfra.IssuingHolder{
      name: "Iron Bank S.A.",
      tax_id: "012.345.678-90",
      external_id: "1234",
      tags: ["Traveler Employee"],
      rules: [
        %StarkInfra.IssuingRule{
          name: "General USD",
          interval: "day",
          amount: 100000,
          currency_code: "USD"
        }
      ]
    }
  ],
  expand: ["rules"]
) |> IO.inspect

Note: Instead of using IssuingHolder structs, you can also pass each transfer element in dictionary format

Query IssuingHolders

You can query multiple holders according to filters.

StarkInfra.IssuingHolder.query!() 
|> Enum.take(10) 
|> IO.inspect

Cancel an IssuingHolder

To cancel a single Issuing Holder by its id, run:

StarkInfra.IssuingHolder.cancel!("5155165527080960") 
|> IO.inspect

Get an IssuingHolder

To get a single Issuing Holder by its id, run:

StarkInfra.IssuingHolder.get!("5155165527080960") 
|> IO.inspect

Query IssuingHolder logs

You can query holder logs to better understand holder life cycles.

StarkInfra.IssuingHolder.Log.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1)
)
|> Enum.take(10) 
|> IO.inspect

Get an IssuingHolder log

You can also get a specific log by its id.

StarkInfra.IssuingHolder.Log.get!("5155165527080960")
|> IO.inspect

Create IssuingCards

You can issue cards with specific spending rules.

StarkInfra.IssuingCard.create!(
  [
    %StarkInfra.IssuingCard{
      holder_name: "Developers",
      holder_tax_id: "012.345.678-90",
      holder_external_id: "1234",
      rules: [
        %StarkInfra.IssuingRule{
          name: "General",
          interval: "week",
          amount: 100000,
          currency_code: "USD"
        }
      ]
    }
  ],
  expand: ["rules", "securityCode", "number", "expiration"]
) |> IO.inspect

Query IssuingCards

You can get a list of created cards given some filters.

StarkInfra.IssuingCard.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
) 
|> Enum.take(10)
|> IO.inspect

Get an IssuingCard

After its creation, information on a card may be retrieved by its id.

StarkInfra.IssuingCard.get!("5155165527080960") 
|> IO.inspect

Update an IssuingCard

You can update a specific card by its id.

StarkInfra.IssuingCard.update!(
  "5155165527080960", 
  status: "blocked"
) |> IO.inspect

Cancel an IssuingCard

You can also cancel a card by its id.

StarkInfra.IssuingCard.cancel!("5155165527080960")
|> IO.inspect

Query IssuingCard logs

Logs are pretty important to understand the life cycle of a card.

StarkInfra.IssuingCard.Log.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1)
) 
|> Enum.take(10) 
|> IO.inspect

Get an IssuingCard log

You can get a single log by its id.

StarkInfra.IssuingCard.Log.get!("5155165527080960") 
|> IO.inspect

Process Purchase authorizations

It's easy to process purchase authorizations delivered to your endpoint. If you do not approve or decline the authorization within 2 seconds, the authorization will be denied.

request = listen()  # this is the method you made to get the events posted to your webhook

{authorization, _cache_pid} = StarkInfra.IssuingAuthorization.parse!(
  content: request.content,
  signature: request.headers["Digital-Signature"]
)

send_response(  # you should also implement this method
  StarkInfra.IssuingAuthorization.response!(
      "accepted",
      amount: authorization.amount,
      tags: ["my-purchase-id/123"]
  )
)

# or

send_response(
  StarkInfra.IssuingAuthorization.response!(
      "denied",
      reason: "other",
      tags: ["other-id/456"]
  )
)

Query IssuingPurchases

You can get a list of created purchases given some filters.

StarkInfra.IssuingPurchase.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
) 
|> Enum.take(10)
|> IO.inspect

Get an IssuingPurchase

After its creation, information on a purchase may be retrieved by its id.

StarkInfra.IssuingPurchase.get!("5155165527080960") 
|> IO.inspect

Query IssuingPurchase logs

Logs are pretty important to understand the life cycle of a purchase.

StarkInfra.IssuingPurchase.Log.query!(
  limit: 50,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1)
) 
|> Enum.take(50) 
|> IO.inspect

Get an IssuingPurchase log

You can get a single log by its id.

StarkInfra.IssuingPurchase.Log.get!("5155165527080960") 
|> IO.inspect

Create IssuingInvoices

Issuing invoices are requests to transfer money to your Issuing Balance. When an Issuing Invoice you created is paid, the amount will be added to your Issuing Balance.

StarkInfra.IssuingInvoice.create!([
  %StarkInfra.IssuingInvoice{
    amount: 1000
  }
]) |> IO.inspect

Note: Instead of using Invoice structs, you can also pass each invoice element in dictionary format

Get an IssuingInvoice

After its creation, information on an invoice may be retrieved by its id. Its status indicates whether it's been paid.

StarkInfra.IssuingInvoice.get!("5155165527080960") 
|> IO.inspect

Query IssuingInvoices

You can get a list of created invoices given some filters.

StarkInfra.IssuingInvoice.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
) 
|> Enum.take(10) 
|> IO.inspect

Query IssuingInvoice logs

Logs are pretty important to understand the life cycle of an invoice.

StarkInfra.IssuingInvoice.Log.query!(
  limit: 50,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1)
) 
|> Enum.take(10) 
|> IO.inspect

Get an IssuingInvoice log

You can get a single log by its id.

StarkInfra.IssuingInvoice.Log.get!("5155165527080960") 
|> IO.inspect

Create IssuingWithdrawals

You can create withdrawals to send cash back from your Issuing balance to your Banking balance by using the Withdrawal resource.

StarkInfra.IssuingWithdrawal.create!(
  %StarkInfra.IssuingWithdrawal{
    amount: 10000,
    external_id: "123"
    description: "Sending back",
  }
) |> IO.inspect

Note: Instead of using Withdrawal structs, you can also pass each withdrawal element in dictionary format

Get an IssuingWithdrawal

After its creation, information on a withdrawal may be retrieved by its id.

StarkInfra.IssuingWithdrawal.get!("5155165527080960") 
|> IO.inspect

Query IssuingWithdrawals

You can get a list of created invoices given some filters.

StarkInfra.IssuingWithdrawal.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
) 
|> Enum.take(10) 
|> IO.inspect

Get your IssuingBalance

To know how much money you have available to run authorizations, run:

StarkInfra.IssuingBalance.get!() 
|> IO.inspect

Query IssuingTransactions

To understand your balance changes (issuing statement), you can query transactions. Note that our system creates transactions for you when you make purchases, withdrawals, receive issuing invoice payments, for example.

StarkInfra.IssuingTransaction.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
) 
|> Enum.take(10) 
|> IO.inspect

Get an IssuingTransaction

You can get a specific transaction by its id:

StarkInfra.IssuingTransaction.get!("5155165527080960") 
|> IO.inspect

Pix

Create PixRequests

You can create a Pix request to transfer money from one of your users to anyone else:

StarkInfra.PixRequest.create!([
  %StarkInfra.PixRequest{
    amount: 100,
    external_id: "141234121",
    sender_account_number: "00000-0",
    sender_branch_code: "0001",
    sender_account_type: "checking",
    sender_name: "Tyrion Lannister",
    sender_tax_id: "012.345.678-90",
    receiver_bank_code: "00000001",
    receiver_account_number: "00000-0",
    receiver_branch_code: "0001",
    receiver_account_type: "checking",
    receiver_name: "Jamie Lannister",
    receiver_tax_id: "012.345.678-90",
    end_to_end_id: StarkInfra.Utils.EndToEndId.generate("00000001") # Pass your bank code to create an end to end ID
  }
]) |> IO.inspect

Note: Instead of using PixRequest structs, you can also pass each element in dictionary format

Query PixRequests

You can query multiple Pix requests according to filters.

StarkInfra.PixRequest.query!(
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
  status: ["success"],
  tags: ["iron", "suit"],
  end_to_end_ids: ["E79457883202101262140HHX553UPqeq"]
) 
|> Enum.take(10) 
|> IO.inspect

Get a PixRequest

After its creation, information on a Pix request may be retrieved by its id. Its status indicates whether it has been paid.

StarkInfra.PixRequest.get!("5155165527080960") 
|> IO.inspect

Query PixRequest logs

You can query Pix request logs to better understand Pix request life cycles.

logs = StarkInfra.PixRequest.Log.query!(
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1)
) 
|> Enum.take(10)
|> IO.inspect

Get a PixRequest log

You can also get a specific log by its id.

StarkInfra.PixRequest.Log.get!("5155165527080960") |> IO.inspect

Create PixReversals

You can reverse a PixRequest either partially or totally using a PixReversal.

StarkInfra.PixReversal.create!([
  %StarkInfra.PixReversal{
    amount: 100,
    external_id: "my_unique_id",
    end_to_end_id: "E00000000202201060100rzsJzG9PzMg",
  }
]) |> IO.inspect

Query PixReversals

You can query multiple Pix reversals according to filters.

StarkInfra.PixReversal.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
  status: ["created"],
  tags: ["iron", "suit"],
  return_ids: ["D20018183202202030109X3OoBHG74wo"]
) 
|> Enum.take(10) 
|> IO.inspect

Get a PixReversal

After its creation, information on a Pix reversal may be retrieved by its id. Its status indicates whether it has been successfully processed.

StarkInfra.PixReversal.get!("5155165527080960") 
|> IO.inspect

Query PixReversal logs

You can query Pix reversal logs to better understand their life cycles.

StarkInfra.PixReversal.Log.query!(
  limit: 50,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1)
)
|> Enum.take(10)
|> IO.inspect

Get a PixReversal log

You can also get a specific log by its id.

StarkInfra.PixReversal.Log.get!("5155165527080960") 
|> IO.inspect

Get your PixBalance

To see how much money you have in your account, run:

StarkInfra.PixBalance.get!() 
|> IO.inspect

Create a PixStatement

Statements are generated directly by the Central Bank and are only available for direct participants. To create a statement of all the transactions that happened on your account during a specific day, run:

statement = StarkInfra.PixStatement.create!(
  after: Date.utc_today |> Date.add(-1), # This is the date that you want to create a statement.
  before: Date.utc_today |> Date.add(-1), # After and before must be the same date.
  type: "transaction"  # Options are "interchange", "interchangeTotal", "transaction".
) |> IO.inspect

Query PixStatements

You can query multiple Pix statements according to filters.

statements = StarkInfra.PixStatement.query!(
  limit: 50,
)
|> Enum.take(10)
|> IO.inspect

Get a PixStatement

Statements are only available for direct participants. To get a Pix statement by its id:

statement = StarkInfra.PixStatement.get!("5674087007387648") 
|> IO.inspect

Get a PixStatement .csv file

To get the .csv file corresponding to a Pix statement using its id, run:

statement_csv = StarkInfra.PixStatement.get_csv!("5674087007387648")
file = File.open!("statement.zip", [:write])
IO.binwrite(file, statement_csv)
File.close(file)

Create a PixKey

You can create a Pix Key to link a bank account information to a key id:

key = StarkInfra.PixKey.create!(
  %StarkInfra.PixKey{
    key_id: "+5511989898989",
    bank_code: "34052649",
    account_number: "052649",
    branch_code: "0001",
    account_type: "checking",
    name: "Tyrion Lannister",
    tax_id: "012.345.678-90",
  }
) |> IO.inspect

Query PixKeys

You can query multiple Pix keys you own according to filters.

keys = StarkInfra.PixKey.query!(
  limit: 1,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
  status: ["registered"],
  tags: ["iron", "suit"],
  ids: ["+5511989898989"],
)
|> Enum.take(10) 
|> IO.inspect

Get a PixKey

Information on a Pix key may be retrieved by its id and the tax ID of the consulting agent. An endToEndId must be informed so you can link any resulting purchases to this query, avoiding sweep blocks by the Central Bank.

StarkInfra.PixKey.get!("+5511989898989", "012.345.678-90") 
|> IO.inspect

Patch a PixKey

Update the account information linked to a Pix Key.

StarkInfra.PixKey.update!(
  "+5511989898989", 
  "reconciliation",
  name: "Tyrion Lannister"
) |> IO.inspect

Cencel a PixKey

Cancel a specific Pix Key using its id.

StarkInfra.PixKey.cancel!("+5511989898989") 
|> IO.inspect

Query PixKey logs

You can query Pix key logs to better understand a Pix key life cycle.

StarkInfra.PixKey.Log.query!(
  limit: 50,
  ids: ["5729405850615808"],
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
  types: ["created"],
  key_ids: ["+5511989898989"]
)
|> Enum.take(10)
|> IO.inspect

Get a PixKey log

You can also get a specific log by its id.

StarkInfra.PixKey.Log.get!("5729405850615808") 
|> IO.inspect

Create a PixClaim

You can create a Pix claim to request the transfer of a Pix key from another bank to one of your accounts:

StarkInfra.PixClaim.create!(
  %StarkInfra.PixClaim{
    account_created: DateTime.utc_now(),
    account_number: "123456789",
    account_type: "checking",
    branch_code: "0001",
    name: "Jamie Lanister",
    tax_id: "012.345.678-90",
    key_id: "+5511933571793",
  }
) |> IO.inspect

Query PixClaims

You can query multiple Pix claims according to filters.

StarkInfra.PixClaim.query!(
  limit: 1,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
  status: ["registered"],
  type: "ownership",
  agent: "claimed",
  key_type: "phone",
  key_id: "+5511989898989"
)
|> Enum.take(10)
|> IO.inspect

Get a PixClaim

After its creation, information on a Pix claim may be retrieved by its id.

StarkInfra.PixClaim.get!("5729405850615808") 
|> IO.inspect

Patch a PixClaim

A Pix Claim can be confirmed or canceled by patching its status. A received Pix Claim must be confirmed by the donor to be completed. Ownership Pix Claims can only be canceled by the donor if the reason is "fraud". A sent Pix Claim can also be canceled.

StarkInfra.PixClaim.update!(
  "5729405850615808", 
  status: "confirmed"
) |> IO.inspect

Query PixClaim logs

You can query Pix claim logs to better understand Pix claim life cycles.

logs = StarkInfra.PixClaim.Log.query!(
  limit: 50,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
  types: ["registered"],
  claim_ids: ["5719405850615809"]
)
|> Enum.take(10)
|> IO.inspect

Get a PixClaim log

You can also get a specific log by its id.

StarkInfra.PixClaim.Log.get!("5719405850615809") 
|> IO.inspect

Create a PixDirector

To register the Pix director contact information at the Central Bank, run the following:

StarkInfra.PixDirector.create!(
  %StarkInfra.PixDirector{
    name: "Tyrion Lannister",
    email: "tyrion@lannister.com",
    phone: "+5511989898989",
    tax_id: "012.345.678-90",
  }
) |> IO.inspect

Create PixInfractions

Pix infractions are used to report transactions that raise fraud suspicion, to request a refund or to reverse a refund. Pix infractions can be created by either participant of a transaction.

StarkInfra.PixInfraction.create!([
  %StarkInfra.PixInfraction{
    reference_id: "E20018183202201201450u34sDGd19lz",
    type: "fraud",
  }
]) |> IO.inspect

Query PixInfractions

You can query multiple Pix infractions according to filters.

StarkInfra.PixInfraction.query!(
  limit: 10,
  after: "2022-01-01",
  before: "2022-01-12",
  status: ["delivered"],
  ids: ["5729405850615808"],
)
|> Enum.take(10)
|> IO.inspect

Get a PixInfraction

After its creation, information on a Pix Infraction may be retrieved by its id.

StarkInfra.PixInfraction.get!("5155165527080960") |> IO.inspect

Update a PixInfraction

A received Pix Infraction can be confirmed or declined by patching its status. After a Pix Infraction is patched, its status changes to closed.

StarkInfra.PixInfraction.update!(
  "5155165527080960", 
  "agreed"
) |> IO.inspect

Cancel a PixInfraction

Cancel a specific Pix Infraction using its id.

StarkInfra.PixInfraction.cancel!("5155165527080960") 
|> IO.inspect

Query PixInfraction logs

You can query Pix infractions logs to better understand their life cycles.

StarkInfra.PixInfraction.Log.query!(
  limit: 50,
  ids: ["5729405850615808"],
  after: "2022-01-01",
  before: "2022-01-20",
  types: ["created"],
  infraction_ids: ["5155165527080960"]
)
|> Enum.take(50)
|> IO.inspect

Get a PixInfraction log

You can also get a specific log by its id.

StarkInfra.PixInfraction.Log.get!("5155165527080960") 
|> IO.inspect

Create PixChargebacks

A Pix chargeback can be created when fraud is detected on a transaction or a system malfunction results in an erroneous transaction.

StarkInfra.PixChargeback.create!(
  %StarkInfra.PixChargeback{
    amount: 100,
    reference_id: "E20018183202201201450u34sDGd19lz",
    reason: "fraud",
  }
)
|> Enum.take(100)
|> IO.inspect

Query PixChargebacks

You can query multiple Pix chargebacks according to filters.

chargebacks = StarkInfra.PixChargeback.query!(
  limit: 1,
  after: "2022-01-01",
  before: "2022-01-12",
  status: ["registered"],
  ids: ["5155165527080960"]
)
|> Enum.take(1)
|> IO.inspect

Get a PixChargeback

After its creation, information on a Pix Chargeback may be retrieved by its.

StarkInfra.PixChargeback.get!("5155165527080960") 
|> IO.inspect

Update a PixChargeback

A received Pix Chargeback can be accepted or rejected by patching its status. After a Pix Chargeback is patched, its status changes to closed.

StarkInfra.PixChargeback.update!(
  "5155165527080960", 
  "accepted",
  reversal_reference_id: StarkInfra.Utils.ReturnId.create!("20018183")
) |> IO.inspect

Cancel a PixChargeback

Cancel a specific Pix Chargeback using its id.

StarkInfra.PixChargeback.cancel!("5155165527080960") 
|> IO.inspect

Query PixChargeback logs

You can query Pix chargeback logs to better understand Pix chargeback life cycles.

StarkInfra.PixChargeback.Log.query!(
  limit: 50,
  ids: ["5729405850615808"],
  after: "2022-01-01",
  before: "2022-01-20",
  types: ["created"],
  chargeback_ids: ["5155165527080960"]
)
|> Enum.take(50)
|> IO.inspect

Get a PixChargeback log

You can also get a specific log by its id.

StarkInfra.PixChargeback.Log.get!("5155165527080960") 
|> IO.inspect

Query PixDomains

You can query for domains of registered SPI participants able to issue dynamic QR Codes.

StarkInfra.PixDomain.query!() 
|> IO.inspect

Credit Note

Create CreditNotes

You can create a Credit Note to generate a CCB contract:

StarkInfra.CreditNote.create!([
  %StarkInfra.CreditNote{
    template_id: "5686220801703936",
    name: "Jamie Lannister",
    tax_id: "012.345.678-90",
    nominal_amount: 100000,
    scheduled: "2022-04-28",
    invoices: [
      %StarkInfra.CreditNote.Invoice{
        due: "2023-06-25",
        amount: 120000,
        fine: 10,
        interest: 2
      }
    ],
    tags: ["test", "testing"],
    payment: %StarkInfra.CreditNote.Transfer{
      due: "2023-06-25",
      amount: 120000,
      fine: 10,
      interest: 2
    }
    signers: [
      %StarkInfra.CreditNote.Transfer{
        due: "2023-06-25",
        amount: 120000,
        fine: 10,
        interest: 2
      }
    ],
    external_id: "my_unique_123",
    street_line_1: "Av. Paulista, 200", 
    street_line_2: "10 andar", 
    district: "Bela Vista", 
    city: "Sao Paulo", 
    state_code: "SP", 
    zip_code: "01310-000", 
  }
]) |> IO.inspect

Note: Instead of using CreditNote structs, you can also pass each CreditNote element in map format

Query CreditNotes

You can query multiple credit notes according to filters.

StarkInfra.CreditNote.query!(
  limit: 10,
  after: Date.utc_today |> Date.add(-30),
  before: Date.utc_today |> Date.add(-1),
  status: ["success"],
  tags: ["iron", "suit"]
)
|> Enum.take(10)
|> IO.inspect

Get a CreditNote

After its creation, information on a credit note may be retrieved by its id.

StarkInfra.CreditNote.get!("5155165527080960") 
|> IO.inspect

Cancel a CreditNote

You can cancel a credit note if it has not been signed yet.

StarkInfra.CreditNote.cancel!("5155165527080960") 
|> IO.inspect

Query CreditNote logs

You can query credit note logs to better understand credit note life cycles.

StarkInfra.CreditNote.Log.query!(
  limit: 10,
  after: "2020-11-01",
  before: "2020-11-02"
)
|> Enum.take(10)
|> IO.inspect

Get a CreditNote log

You can also get a specific log by its id.

StarkInfra.CreditNote.log.get!("5155165527080960") 
|> IO.inspect

Webhook

Create a Webhook subscription

To create a webhook subscription and be notified whenever an event occurs, run:

StarkInfra.Webhook.create!(
  url: "https://webhook.site/dd784f26-1d6a-4ca6-81cb-fda0267761ec",
  subscriptions: ["contract", "credit-note", "signer", "issuing-card", "issuing-invoice", "issuing-purchase", "pix-request.in", "pix-request.out", "pix-reversal.in", "pix-reversal.out", "pix-claim", "pix-key", "pix-chargeback", "pix-infraction"]
) |> IO.inspect

Query Webhooks

To search for registered webhooks, run:

for webhook <- StarkInfra.Webhook.query!() do
  webhook |> IO.inspect
end

Get a Webhook subscription

You can get a specific webhook by its id.

StarkInfra.Webhook.get!("6178044066660352")
|> IO.inspect

Delete a Webhook subscription

You can also delete a specific webhook by its id.

StarkInfra.Webhook.delete!("6178044066660352")
|> IO.inspect

Webhook events

Process Webhook events

It's easy to process events delivered to your Webhook endpoint. Remember to pass the signature header so the SDK can make sure it was StarkInfra that sent you the event.

response = listen()  # this is the function you made to get the events posted to your webhook

{event, _cache_pid} = StarkInfra.Event.parse!(
  content: response.content,
  signature: response.headers["Digital-Signature"]
) |> IO.inspect

To avoid making unnecessary requests to the API (/GET public-key), you can pass the cache_pid (returned on all requests) on your next parse. The process referred by the PID cache_pid will store the latest Stark Bank public key and automatically refresh it if an inconsistency is found between the content, signature and current public key.

Note: If you don't send the cache_pid to the parser, a new cache process will be generated.

{event, _cache_pid} = StarkInfra.Event.parse!(
  content: response.content,
  signature: response.headers["Digital-Signature"],
  cache_pid: cache_pid
) |> IO.inspect

If the data does not check out with the Stark Bank public-key, the function will automatically request the key from the API and try to validate the signature once more. If it still does not check out, it will raise an error.

Query Webhook events

To search for webhooks events, run:

StarkInfra.Event.query!(
  after: "2020-03-20",
  is_delivered: false,
  limit: 10
) 
|> Enum.take(10)
|> IO.inspect

Get a Webhook event

You can get a specific webhook event by its id.

StarkInfra.Event.get!("4568139664719872")
|> IO.inspect

Delete a Webhook event

You can also delete a specific webhook event by its id.

StarkInfra.Event.delete!("4568139664719872")
|> IO.inspect

Set Webhook events as delivered

This can be used in case you've lost events. With this function, you can manually set events retrieved from the API as "delivered" to help future event queries with is_delivered: false.

StarkInfra.Event.update!("5764442407043072", is_delivered: true)
|> IO.inspect

Query failed Webhook event delivery attempts information

You can also get information on failed webhook event delivery attempts.

for attempt <- StarkInfra.Event.Attempt.query!(after: "2020-03-20") do
  attempt |> IO.inspect attempt
end

Get a failed Webhook event delivery attempt information

To retrieve information on a single attempt, use the following function:

StarkInfra.Event.Attempt.get("1616161616161616")
|> IO.inspect

Handling errors

The SDK may raise or return errors as the StarkInfra.Error struct, which contains the "code" and "message" attributes.

If you use bang functions, the list of errors will be converted into a string and raised. If you use normal functions, the list of error structs will be returned so you can better analyse them.

Help and Feedback

If you have any questions about our SDK, just send us an email. We will respond you quickly, pinky promise. We are here to help you integrate with us ASAP. We also love feedback, so don't be shy about sharing your thoughts with us.

Email: help@starkinfra.com

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SDK to facilitate Elixir integrations with the Stark Infra API

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