Haystack

Haystack is a low-level API client for Paystack. It features an intuitive interface that maps directly to the Paystack API.

Haystack comes with a webhook handler that intercepts events received from Paystack, and allows you to perform actions based on the event type.

Usage Examples

1. Create client:

   paystack = Haystack.new(secret_key: "secret-key")

2. Create charge:

   paystack.charges.create(
     email: "customer@email.com",
     amount: "20000"
   ) do |response|
     return puts response.message unless response.success?
   
     response.data.try do |transaction|
       puts transaction.transaction_date.try &.second
       puts transaction.subaccount.try &.account_number
       puts transaction.status
       # ...
     end
   end

3. Initialize transaction:

   paystack.transactions.initiate(
     email: "customer@email.com",
     amount: "20000",
     currency: "GHS"
   ) do |response|
     return puts response.message unless response.success?
   
     response.data.try do |authorization|
       puts authorization.access_code
       puts authorization.authorization_url
       puts authorization.reference
     # ...
     end
   end

4. Verify transaction:

   paystack.transactions.verify(reference: "abcdef") do |response|
     return puts response.message unless response.success?
   
     response.data.try do |transaction|
       puts transaction.status
       puts transaction.authorization.try &.authorization_code
       puts transaction.channel
     # ...
     end
   end

5. List invoices:

   paystack.invoices.list(perPage: "20", page: "2") do |response|
     return puts response.message unless response.success?
   
     response.data.try &.each do |invoice|
       puts invoice.archived
       puts invoice.currency
       puts invoice.description
       # ...
     end
   end

Documentation

Find the complete documentation in the docs/ directory of this repository.

Development

1. Copy your test secret key from your Paystack dashboard.

2. Create a .env.sh file:

   #!/bin/bash
   #
   export PAYSTACK_SECRET_KEY='your-paystack-test-secret-key-here'

3. Update the file with your own details. Then run tests with source .env.sh && crystal spec.

IMPORTANT: Remember to set permissions for your env file to 0600 or stricter: chmod 0600 .env*.

Contributing

1. Fork it
2. Switch to the master branch: git checkout master
3. Create your feature branch: git checkout -b my-new-feature
4. Make your changes, updating changelog and documentation as appropriate.
5. Commit your changes: git commit
6. Push to the branch: git push origin my-new-feature
7. Submit a new Pull Request against the GrottoPress:master branch.