Mutations

authorizeBasket

Type: AuthorizedBasket!

The backend signs the sale(s)/offer(s) for the user to send to kalaoExchange contract for buying/selling the requested saleID(s)

Workflow of a sale/offer execution:

  ┌─────┐          ┌───────┐            ┌───────────────────────┐
  │Front│          │Backend│            │Exchange Smart Contract│
  └──┬──┘          └───┬───┘            └───────────┬───────────┘
     │                 │                            │
     │authorizeBasket()│                            │
     │────────────────>│                            │
     │                 │                            │
     │     Tickets     │                            │
     │<────────────────│                            │
     │                 │                            │
     │BulkBuy(Tickets) or  bulkOffersAccept(Tickets)│
     │─────────────────────────────────────────────>│
  ┌──┴──┐          ┌───┴───┐            ┌───────────┴───────────┐
  │Front│          │Backend│            │Exchange Smart Contract│
  └─────┘          └───────┘            └───────────────────────┘

<p style={{ marginBottom: "0.4em" }}><strong>Arguments</strong></p>

<table>
<thead><tr><th>Name</th><th>Description</th></tr></thead>
<tbody>
<tr>
<td>
input<br />
<a href="/docs/api-details/inputObjects#basketrequest"><code>BasketRequest!</code></a>
</td>
<td>

</td>
</tr>
</tbody>
</table>

## cancelDeal

**Type:** [CancelStatus!](/docs/api-details/objects#cancelstatus)

Cancel a sale/offer, the user needs to be authentified (cancel Nonce)

Workflow of a sale/offer cancel: The sale/offer can be cancelled by a simple backend call when no tickets are used, otherwise a call to the smart contract is required.

┌─────┐                                      ┌───────┐┌───────────────────────┐
│Front│                                      │Backend││Exchange Smart Contract│
└──┬──┘                                      └───┬───┘└───────────┬───────────┘
   │                                             │                │
   │                  cancel()                   │                │
   │────────────────────────────────────────────>│                │
   │                                             │                │
   │cancelled? yes = OK, no = smart contract call│                │
   │<────────────────────────────────────────────│                │
   │                                             │                │
   │    if not cancelled => bulkCancel() or bulkOfferCancel()     │
   │─────────────────────────────────────────────────────────────>│
┌──┴──┐                                      ┌───┴───┐┌───────────┴───────────┐
│Front│                                      │Backend││Exchange Smart Contract│
└─────┘                                      └───────┘└───────────────────────┘

Arguments

Name	Description
input CancelRequest!	The deal kind and Id
cancel_nonce String!	The nonce you previously received from calling cancelNonce
cancel_signature String!	The hex personal_sign (keccak256) signature on the cancel_nonce string
user_address Address!	The deal creator

cancelNonce

Type: String!

Get a cancel ownership proof nonce for a non logged in user message with confirm cancel sale xxx with address xxx

Arguments

Name	Description
user_address Address!
request CancelRequest!

createDeal

Type: ID!

Create either a sale or an offer depending on kind

Arguments

Name	Description
input DealRequest!

placeBid

Type: Boolean!

Place a bid on an auction deal kind

Arguments

Name	Description
auction_id ID!
bid OfferInput!

saleNonce

Type: Int!

A random nonce for sale or offer signature (10 minutes validity)