Add dotenv support for arguments

.gitignore

@@ -1,4 +1,4 @@
 /target
-
+.env
 *.swp
 .idea

CHANGELOG.md

@@ -6,6 +6,7 @@ page. See [DEVELOPMENT_CYCLE.md](DEVELOPMENT_CYCLE.md) for more details.
 ## [Unreleased]
 
 - Added support for Multipath (two-paths) descriptors.
+- Add `env` feature that loads arguments from a .env file via dotenvy
 
 
 ## [4.0.0]

Cargo.toml

@@ -40,9 +40,13 @@ reqwest = { version = "0.13.2", default-features = false, features = ["rustls"],
 url = { version = "2.5.8", optional = true }
 bdk_message_signer = { version = "0.2.0", optional = true }
 bitcoin-payment-instructions = { version = "0.7.0", optional = true}
+dotenvy = { version = "0.15.7", optional = true }
 
 [features]
-default = ["repl", "sqlite"]
+default = ["repl", "sqlite", "env"]
+
+# Load arguments from a .env file instead of typing them manually
+env = ["dotenvy"]
 
 # To use the app in a REPL mode
 repl = ["shlex"]
@@ -56,7 +60,7 @@ cbf = ["bdk_kyoto", "_payjoin-dependencies"]
 electrum = ["bdk_electrum", "_payjoin-dependencies"]
 esplora = ["bdk_esplora", "_payjoin-dependencies"]
 rpc = ["bdk_bitcoind_rpc", "_payjoin-dependencies"]
-dns_payment = ["bitcoin-payment-instructions"] 
+dns_payment = ["bitcoin-payment-instructions"]
 
 # Internal features
 _payjoin-dependencies = ["payjoin", "reqwest", "url", "sqlite"]

README.md

@@ -52,12 +52,13 @@ bdk-cli can be compiled with different features to suit your experimental needs.
      - `rpc`: Connects the wallet to Bitcoind server.
   - Extra Utility Tools
      - `repl` : use bdk-cli as a [REPL](https://codewith.mu/en/tutorials/1.0/repl) shell (useful for quick manual testing of wallet operations).
+     - `env` : loads arguments from a .env file via dotenvy
      - `compiler` : opens up bdk-cli policy compiler commands.
      - `message_signer`: BIP322 message signing/verification.
      - `silent-payments`: Experimental BIP-352 silent payment sending
      - `dns_payment`: BIP-353 DNS payment instructions
 
-The `default` feature set is `repl` and `sqlite`. With the `default` features, `bdk-cli` can be used as an **air-gapped** wallet, and can do everything that doesn't require a network connection.
+The `default` feature set is `repl`, `env` and `sqlite`. With the `default` features, `bdk-cli` can be used as an **air-gapped** wallet, and can do everything that doesn't require a network connection.
 
 
 ## Install bdk-cli

src/main.rs

@@ -34,6 +34,7 @@ use clap::{CommandFactory, Parser};
 #[tokio::main]
 async fn main() {
     env_logger::init();
+    dotenvy::dotenv().ok();
     let cli_opts: CliOpts = CliOpts::parse();
 
     let network = &cli_opts.network;