refactor: allow db to be choosen in config

Cargo.toml

@@ -35,9 +35,10 @@ clap = { version = "4.3.14", features = ["env", "default", "derive"]}
 anyhow = "1.0.71"
 cdk = { git = "https://github.com/cashubtc/cdk", rev = "e1506c4", default-features = false, features = ["mint"] }
 cdk-sqlite = { git = "https://github.com/cashubtc/cdk", rev = "e1506c4", default-features = false, features = ["mint"] }
+cdk-redb = { git = "https://github.com/cashubtc/cdk", rev = "e1506c4", default-features = false, features = ["mint"] }
 # cdk = { path = "../../cdk/sql/crates/cdk", default-features = false, features = ["mint"] }
- #cdk-sqlite = { path = "../../cdk/sql/crates/cdk-sqlite", default-features = false, features = ["mint"] }
-# cdk-redb = { path = "../../cdk/nut14/crates/cdk-redb" }
+# cdk-sqlite = { path = "../../cdk/sql/crates/cdk-sqlite", default-features = false, features = ["mint"] }
+# cdk-redb = { path = "../../cdk/nut14/crates/cdk-redb", default-features = false, features = ["mint"] }
 
 bitcoin = { version = "0.30.0", features = ["no-std"] }
 serde = "1.0.164"

config.toml

@@ -16,10 +16,14 @@ last_pay_path = "/tmp/cashu-rs-mint/last_pay.txt"
 [contact]
 email = "[email protected]"
 
+[database]
+# Database engine (sqlite/redb) defaults to sqlite
+# engine = "sqlite"
+
 [ln]
 
-# Required ln backend `Cln`, `Ldk`, `Greenlight`
-ln_backend = "Cln"
+# Required ln backend `cln`, `ldk`, `greenlight`
+ln_backend = "cln"
 
 # CLN
 cln_path = "/tmp/cashu-rs-mint/lighting/ln_1/regtest/lightning-rpc"

src/config.rs

@@ -69,6 +69,7 @@ fn last_pay_path() -> String {
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Default)]
+#[serde(rename_all = "lowercase")]
 pub enum LnBackend {
     #[default]
     Cln,
@@ -86,11 +87,25 @@ pub struct Ln {
     pub reserve_fee_min: Amount,
 }
 
+#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Default)]
+#[serde(rename_all = "lowercase")]
+pub enum DatabaseEngine {
+    #[default]
+    Sqlite,
+    Redb,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct Database {
+    pub engine: DatabaseEngine,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct Settings {
     pub info: Info,
     //    pub mint_info: MintInfo,
     pub ln: Ln,
+    pub database: Database,
 }
 
 impl Settings {

src/main.rs

@@ -16,13 +16,15 @@ use axum::routing::{get, post};
 use axum::Router;
 use bip39::Mnemonic;
 use cdk::amount::Amount;
+use cdk::cdk_database::{self, MintDatabase};
 use cdk::mint::Mint;
 use cdk::nuts::nut02::Id;
 use cdk::nuts::{
     CheckStateRequest, CheckStateResponse, MeltBolt11Request, MeltBolt11Response,
     MintBolt11Request, MintBolt11Response, SwapRequest, SwapResponse, *,
 };
 use cdk::types::MintQuote;
+use cdk_redb::MintRedbDatabase;
 use cdk_sqlite::MintSqliteDatabase;
 use clap::Parser;
 use error::into_response;
@@ -33,9 +35,10 @@ use tower_http::cors::CorsLayer;
 use tracing::{debug, warn};
 use utils::unix_time;
 
-pub const CARGO_PKG_VERSION: Option<&'static str> = option_env!("CARGO_PKG_VERSION");
-
 use crate::cli::CLIArgs;
+use crate::config::DatabaseEngine;
+
+pub const CARGO_PKG_VERSION: Option<&'static str> = option_env!("CARGO_PKG_VERSION");
 
 mod cli;
 mod config;
@@ -68,15 +71,21 @@ async fn main() -> anyhow::Result<()> {
         None => settings.info.clone().db_path,
     };
 
-    let localstore = MintSqliteDatabase::new(db_path.to_str().unwrap()).await?;
+    let localstore: Arc<dyn MintDatabase<Err = cdk_database::Error> + Send + Sync> =
+        match settings.database.engine {
+            DatabaseEngine::Sqlite => {
+                Arc::new(MintSqliteDatabase::new(db_path.to_str().unwrap()).await?)
+            }
+            DatabaseEngine::Redb => Arc::new(MintRedbDatabase::new(db_path.to_str().unwrap())?),
+        };
     let mint_info = MintInfo::default();
 
     let mnemonic = Mnemonic::from_str(&settings.info.mnemonic)?;
 
     let mint = Mint::new(
         &mnemonic.to_seed_normalized(""),
         mint_info,
-        Arc::new(localstore),
+        localstore,
         Amount::ZERO,
         0.0,
     )