jwinterm
4c71af15e0
Electrum/Fulcrum already covers everything the backend needs for Bitcoin and Litecoin — balance, UTXOs, history, tip, verbose tx, fee estimation, and broadcast (blockchain.transaction.broadcast). A self-hosted Fulcrum relays broadcasts to its own backing node, so a separate Bitcoin Core RPC path buys nothing in the self-host model while adding the bitcoincore-rpc + bitcoin + secp256k1 + jsonrpc dependency tree and a duplicate broadcast surface. - Remove the `bitcoincore-rpc` dependency (and its transitive tree). - Slim `UtxoConfig` to pure Electrum config: drop use_local_node / rpc_url / rpc_user / rpc_pass; keep network + electrum_primary + electrum_fallbacks. A future LTC-MWEB or direct-node provider is a distinct capability (MWEB uses a scan-key model, not canonical scriptPubKeys) and would slot in at the provider seam rather than extending this client — so nothing is foreclosed by keeping the surface minimal now.
smirk-backend-core
Open, self-hostable backend for the Smirk non-custodial, multi-chain wallet. It provides the chain-access and identity surface a Smirk wallet needs — authentication, per-chain wallet access (Bitcoin, Litecoin, Monero, Wownero, Grin), the Grin slatepack relay, and Nostr-based identity — so anyone can run their own backend and a Smirk wallet can connect to it.
Status: early, under active development. Interfaces and the database schema may change before the first tagged release. Not yet recommended for production self-hosting.
What it is
- Non-custodial. The server never holds spend keys or seeds. It brokers access to blockchain data and relays wallet-to-wallet messages.
- Open core, feature-flagged. Every feature ships in this codebase and is
toggled per deployment; the wallet reads
GET /api/v1/capabilitiesand adapts to what a given backend offers. - Identity via "Sign in with Smirk". Authentication uses a seed-derived Nostr key (NIP-98); the server stores only public keys.
- Privacy first. No PII is required to use it; operator and user privacy are explicit design goals.
Architecture
Rust + Axum, PostgreSQL via sqlx. The public HTTP contract is generated from the handlers with utoipa (OpenAPI), which in turn drives the wallet's generated TypeScript client — one source of truth, checked for drift in CI.
Quickstart
cp .env.example .env # then fill in DATABASE_URL, JWT_SECRET, node URLs
cargo run # starts the API server
A full self-hosting guide (node requirements, reverse proxy, Tor admin onion,
backups) will live in docs/ as it stabilises.
Security
Please report vulnerabilities privately — see SECURITY.md. Do not open public issues for security reports.
License
To be finalized (MIT vs AGPL-3.0-or-later). Until a LICENSE file is added,
all rights are reserved.