v0.3.0

Summary

New Features and NUTs

• V4 Tokens which is a new format that uses CBOR for serializing tokens.
• NUT-11 (P2PK) support in mint for verifying Pay-to-Public-Key spending conditions. This was already supported in wallet.
• NUT-07 in mint which enables wallets to check whether a proof is spent or not.
• NUT-09 (Signature restore) for mint to reissue blind signatures from previously seen blinded blinded messages.
• Added support for NUT-12 (DLEQ Proofs) in wallet and mint.
• Support NUT-08 in wallet. This enables wallet to get any overpaid lightning fees back from a melt request.
• Added fake backend in mint that will mark all the quotes as paid. Only to be used for testing.
• NUT-14 (HTLCs) support in both wallet and mint.

What's Changed

• mint: err on blinded messages already signed by @elnosh in #46
• add examples for wallet by @elnosh in #47
• mint: NUT-11 Pay to Public Key by @elnosh in #48
• wallet: err on non-200 responses by @elnosh in #50
• wallet: command to see and change default mint by @elnosh in #51
• Token V4 by @elnosh in #52
• mint: NUT-07 token state check by @elnosh in #56
• mint: NUT-09 signature restore by @elnosh in #57
• wallet: NUT-12 DLEQ proofs support by @elnosh in #60
• mint: NUT-12 DLEQ proofs by @elnosh in #61
• settle mint and melt quotes internally if invoice is the same by @elnosh in #62
• refactor melt flow by @elnosh in #63
• mint: check already existing quotes by @elnosh in #64
• only fail melt for failed status check by @elnosh in #65
• wallet: NUT-08 overpaid lightning fees by @elnosh in #66
• wallet: handle pending proofs by @elnosh in #68
• optional wallet path in env file by @elnosh in #70
• README: fix build instructions by @starius in #72
• mint: fake lightning backend by @elnosh in #71
• NUT-14 HTLCs by @elnosh in #73
• better define sat unit by @elnosh in #74

New Contributors

• @starius made their first contribution in #72

Full Changelog: v0.2.0...v0.3.0

v0.2.0

Updates

New features and protocol updates.

Wallet

• Pay to Public Key (P2PK). This enables generating a token to send that is locked to a public key and can only be redeemed by providing a valid signature. From the CLI wallet, this feature can be used with the send --lock <pubkey> <amount> and p2pk-lock to retrieve a public key to which ecash can be locked. Exposed through the SendToPubkey method.
• Fees. Wallet now supports fees according to NUT-02 which recently introduced fees to the protocol.
• NUT-09 and NUT-13. Generates secrets deterministically (NUT-13) from a seed phrase and in combination with NUT-09 to restore signatures from the mint. This enables restoring a wallet from a seed phrase. In wallet it can be used with the restore command.

Mint

• Fees. Support for NUT-02 fees. Wide support for this feature is still in development so enabling fees in mint could potentially break wallets that do not support it yet.
• Limits to mint. These can be specified in the .env file:
  - MAX_BALANCE will disable minting new ecash if the specified balance is reached.
  - MINTING_MAX_AMOUNT
  - MELTING_MAX_AMOUNT
• Deprecated BoltDB and moved to SQLite.
• gRPC client for LND instead of REST.

v0.1.0

comments for mint and wallet packages