By EZ in Releases — Jun 26, 2023

Cashu Nutshell v0.12.1: Performance and Stability Improvements

Cashu is a Chaumian Ecash wallet and mint for Bitcoin Lightning. Cashu Nutshell is the reference implementation in Python.

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"This release includes a ton of performance and stability improvements!"
Disclaimer: Cashu is still experimental and not production-ready.

What's new

NUTs

Dynamic change output amounts (NUT-08 update).

Mint

Use httpx library instead of requests for asynchronous operations.
Transition from using DB locks to asyncio locks (for compatibility with RaspberryPi systems and LNbits).

Wallet

Huge performance increase thanks to db optimizations.
Multimint swaps in Nutshell! Enter cashu swap or use the wallet API.
Option to mint tokens of a specific denomination (for headless operation).
Option to send existing token denominations without a /split (for high-frequency payments).
Improve wallet REST API.

Changes

[Wallet] Bugfix/enable-funding-multiple-mints by @callebtc in #210
add CONTRIBUTING.md by @callebtc in #211
Allow to set maximum peg in/out for mint by @sihamon in #209
Assert mint_private_key is available at startup by @xphade in #208
[Mint] add trace logs by @callebtc in #213
more traces by @callebtc in #214
Mint/moremore_traces by @callebtc in #215
more logging by @callebtc in #216
add transactions and locking for certain operations by @Semisol in #217
Chore: make format by @callebtc in #218
Refactor Compat and Database for LNbits comaptibility by @callebtc in #219
[Mint] Fix balance views for Postgres by @callebtc in #222
[Mint] rewrite lnbits backend with httpx by @callebtc in #230
Mint API: Check ?amount is within a sensible range by @AngusP in #226
[Mint] LNBits backend refactor httpx by @AngusP in #234
db: postgres cast int to bigint by @callebtc in #231
Add secp256k1 deps to dockerfile by @ebrakke in #235
[Wallet] Define responses for API by @sihamon in #233
Catch all exceptions in wallet API by @sihamon in #220
Implement dynamic amount of tokens for change by @xphade in #223
[Wallet] API: optional amount in InvoiceResponse by @callebtc in #236
update .env example to reflect latest flags by @callebtc in #238
fix typo by @callebtc in #239
Allow to start wallet API by cashu --daemon by @sihamon in #243
[Wallet] Allow minting of specific amounts by @callebtc in #248
[Wallet] send without split by @callebtc in #249
[Wallet] DB optimization for faster payments by @callebtc in #250
update readme by @callebtc in #251
[Mint] Fix: check keyset id in mint and allow custom split amounts for LIGHTNING=False by @callebtc in #253
[Wallet] balance: await wallet.load_proofs() by @callebtc in #254
[Wallet] no async for deserialization functions by @callebtc in #255
Use m̶u̶l̶t̶i̶p̶r̶o̶c̶e̶s̶s̶i̶n̶g̶ asyncio locks instead of db locks by @callebtc in #256
[Wallet] store public keys of each keyset by @callebtc in #165
Add multi-mint swap to CLI and API by @sihamon in #212
bump version to 0.12.1 by @callebtc in #258
Wallet: fix wallet pubkey migration start by @callebtc in #259