feat: payment quotes

[grumbach]

Description

Summary generated by Reviewpad on 20 Nov 23 06:58 UTC

This pull request includes changes in multiple files:

1. The response.rs file:

   • Renamed the store_cost field to quote and changed its type from Result<NanoTokens> to Result<PaymentQuote>.
   • Updated the debug implementation of the QueryResponse enum.

2. The offline_transfer.rs file:

   • Removed imports for CashNoteRedemption, UniquePubkey, and ContentPaymentsMap.
   • Removed struct definitions for PaymentDetails and ContentPaymentsMap.
   • Updated the OfflineTransfer struct by replacing the all_extended_data_payments field with all_spend_requests.

3. The data_payments.rs file:

   • Introduced new struct definitions: Payment, PaymentDetails, and PaymentQuote.
   • Defined type aliases: ContentPaymentsMap and QuoteSignature.
   • Added utility methods to the PaymentDetails and PaymentQuote structs.
   • Added module-level documentation, file header, and license information.
   • Imported necessary modules and types from other files.

4. The sn_client/src/wallet.rs file:

   • Renamed the get_payment_transfers function to get_payment_for_addr.
   • Modified the return type of get_payment_for_addr from Vec<Transfer> to Payment.
   • Changed the return type of get_store_cost_at_address from (MainPubkey, NanoTokens) to (MainPubkey, PaymentQuote).
   • Updated the argument type of the pay_for_records function to use BTreeMap<XorName, (MainPubkey, PaymentQuote)>.

5. The sn_client/src/api.rs file:

   • Imported the Payment struct from the sn_transfers module.
   • Changed the payment parameter type in the store_chunk method to Payment.

6. The wallet.rs file in the wallet module:

   • Updated imports for Payment, PaymentQuote, CashNoteRedemption, and ContentPaymentsMap.
   • Modified function signatures and logic related to payment transfers and storage payments.

7. The quote.rs file:

   • Added a new file implementing payment quote functionality, including quote creation and verification.

8. The lib.rs file:

   • Added a new module called quote.

9. Other miscellaneous changes in various files related to imports, function names, and code logic.

Please review these changes for correctness, compatibility, and adherence to requirements.

[joshuef]

lets get some more docs/info around these. How the quotes are envisaged to be used etc. (here and below)

[joshuef]

lets add a comment as to how/why this was chosen too 🙇