* Fix SQLite race condition
Bug: https://github.com/crodas/cdk/actions/runs/15732950296/job/44339804072#step:5:1853
Reason: When melting in parallel, many update the melt status and attempt to
add proofs and they fail when adding the proof and the rollback code kicks in.
The loser process removes all the proofs, and the winner process has no proof
later on.
Fix: Modify `update_melt_quote_state` requirements and implementation to allow
only one winner.
This will be solved by design with a transaction writer trait
* Remove `melt_request`
Fixes#809
* Remove `get_melt_request` from db trait
Bug: https://github.com/cashubtc/cdk/actions/runs/15683152414/job/44190084378?pr=822#step:5:19212
Reason: a race condition between removing proofs while melting and the quote states being updated.
Solution:
1. Error on duplicate proofs
2. Read quote when updating to avoid race conditions and rollbacks
Real solution: A transaction trait in the storage layer. That is coming next
Add a strict set of updates to prevent incorrect state changes and correct
usage. Supporting the transaction at the trait level prevented some cases, but
having a strict set of state change flows is better.
This bug was found while developing the signatory. The keys are read from
memory, triggering race conditions at the database, and some `Pending` states
are selected (instead of just selecting `Unspent`).
This PR also introduces a set of generic database tests to be executed for all
database implementations, this test suite will make sure writing and
maintaining new database drivers
* feat: Add created_time and paid_time fields to MintQuote struct
* feat: Add serde default of 0 for created_time in MintQuote
* feat: Add created_time and paid_time to MintQuote and MeltQuote structs
* feat: Add paid_time update when setting melt quote state to Paid
* fix: Update melt quote state with current Unix timestamp
* feat: Add paid_time update for mint quote when state is set to Paid
* feat: Add issued_time field to MintQuote conversion from SQLite row
* feat: Add issued_time tracking for MintQuoteState::Issued state
* feat: Add migration script for mint time of quotes
* feat: Add timestamp columns to mint_quote and melt_quote tables
* feat: Add timestamp columns to `add_mint_quote` method
* refactor: Improve code formatting and readability in mint quote state update logic
* feat: Add created_time and paid_time columns to melt_quote query
* feat: time on mint and melt quotes
* feat: Add migration script for mint created time signature
feat: Add created_time column to blind_signature table
feat: Add created_time to blind_signature insertion
feat: Add created_time column to proof table and update insert query
feat: time on mint and melt quotes
* feat: Add new table to track blind signature creation time
* feat: Add timestamp tracking for proofs in ReDB database
* feat: redb proof time
* chore: fmt
- MintKeysDatabase
- MintQuotesDatabase
- MintProofsDatabase
- MintSignaturesDatabase
This commit splits the MintDatabase trait with 30+ methods into a series
of smaller traits, each dedicate to a specific subsystem of the mint
service.
