simonireilly / hasura-giftcards

Hasura with Postgres 12 implementation of a payment gateway for gift card services

Gift Cards Hasura

A simple gift card payment gateway written in hasura with postgres 12

DEV EX

Starting from scratch make down init restart tail.

To boot the app run make up.

To test the app run make test

To update the metadata use the hasura console at localhost:8080 then run make hasura-export-metadata

Meta data is applied on boot of the hasura docker iamge, to clear it run make hasura-clear-metadata

Workflow

• Request a gift card with an initial balance and a CODE
• Request a claim on that gift card which must be less than the available balance
• Settle/Reject the claim to increment the redeemed balance on the gift card
• Repeat

Queries

query GetGiftCardByCode {
  gift_cards(where: {code: {_eq: "COOL_SHOP-1000001"}}) {
    id
    code
    valid_from
    valid_to
    initial_balance
    available_balance
    created_at
    updated_at
    claims {
      state
      id
      amount
    }
  }
}

mutation CreateClaim {
  insert_claims(objects: {amount: 10, gift_card_id: 1}) {
    returning {
      id
    }
  }
}

mutation CreateGiftCard {
  insert_gift_cards(objects: {initial_balance: 10, code: "COOL_SHOP-1000001"}) {
    returning {
      initial_balance
      id
      created_at
      updated_at
      valid_from
      valid_to
    }
  }
}