Allow reading suri && password override from file (#1059)

* allow reading suri && password override from file

* fix clippy

* Update relays/bin-substrate/src/cli/mod.rs

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* Update relays/bin-substrate/src/cli/mod.rs

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

bridges/relays/bin-substrate/Cargo.toml

@@ -63,3 +63,4 @@ sp-version = { git = "https://github.com/paritytech/substrate", branch = "master
 hex-literal = "0.3"
 pallet-bridge-grandpa = { path = "../../modules/grandpa" }
 sp-keyring = { git = "https://github.com/paritytech/substrate", branch = "master" }
+tempdir = "0.3"

bridges/relays/bin-substrate/src/cli/mod.rs

@@ -374,24 +374,61 @@ macro_rules! declare_chain_options {
 			}
 
 			#[doc = $chain " signing params."]
-			#[derive(StructOpt, Debug, PartialEq, Eq)]
+			#[derive(StructOpt, Debug, PartialEq, Eq, Clone)]
 			pub struct [<$chain SigningParams>] {
 				#[doc = "The SURI of secret key to use when transactions are submitted to the " $chain " node."]
 				#[structopt(long)]
-				pub [<$chain_prefix _signer>]: String,
+				pub [<$chain_prefix _signer>]: Option<String>,
 				#[doc = "The password for the SURI of secret key to use when transactions are submitted to the " $chain " node."]
 				#[structopt(long)]
 				pub [<$chain_prefix _signer_password>]: Option<String>,
+
+				#[doc = "Path to the file, that contains SURI of secret key to use when transactions are submitted to the " $chain " node. Can be overridden with " $chain_prefix "_signer option."]
+				#[structopt(long)]
+				pub [<$chain_prefix _signer_file>]: Option<std::path::PathBuf>,
+				#[doc = "Path to the file, that password for the SURI of secret key to use when transactions are submitted to the " $chain " node. Can be overridden with " $chain_prefix "_signer_password option."]
+				#[structopt(long)]
+				pub [<$chain_prefix _signer_password_file>]: Option<std::path::PathBuf>,
 			}
 
 			impl [<$chain SigningParams>] {
 				/// Parse signing params into chain-specific KeyPair.
 				pub fn to_keypair<Chain: CliChain>(&self) -> anyhow::Result<Chain::KeyPair> {
+					let suri = match (self.[<$chain_prefix _signer>].as_ref(), self.[<$chain_prefix _signer_file>].as_ref()) {
+						(Some(suri), _) => suri.to_owned(),
+						(None, Some(suri_file)) => std::fs::read_to_string(suri_file)
+							.map_err(|err| anyhow::format_err!(
+								"Failed to read SURI from file {:?}: {}",
+								suri_file,
+								err,
+							))?,
+						(None, None) => return Err(anyhow::format_err!(
+							"One of options must be specified: '{}' or '{}'",
+							stringify!([<$chain_prefix _signer>]),
+							stringify!([<$chain_prefix _signer_file>]),
+						)),
+					};
+
+					let suri_password = match (
+						self.[<$chain_prefix _signer_password>].as_ref(),
+						self.[<$chain_prefix _signer_password_file>].as_ref(),
+					) {
+						(Some(suri_password), _) => Some(suri_password.to_owned()),
+						(None, Some(suri_password_file)) => std::fs::read_to_string(suri_password_file)
+							.map(Some)
+							.map_err(|err| anyhow::format_err!(
+								"Failed to read SURI password from file {:?}: {}",
+								suri_password_file,
+								err,
+							))?,
+						_ => None,
+					};
+
 					use sp_core::crypto::Pair;
 
 					Chain::KeyPair::from_string(
-						&self.[<$chain_prefix _signer>],
-						self.[<$chain_prefix _signer_password>].as_deref()
+						&suri,
+						suri_password.as_deref()
 					).map_err(|e| anyhow::format_err!("{:?}", e))
 				}
 			}
@@ -419,6 +456,7 @@ declare_chain_options!(Target, target);
 
 #[cfg(test)]
 mod tests {
+	use sp_core::Pair;
 	use std::str::FromStr;
 
 	use super::*;
@@ -456,4 +494,84 @@ mod tests {
 		// then
 		assert_eq!(hex.0, hex2.0);
 	}
+
+	#[test]
+	fn reads_suri_from_file() {
+		const ALICE: &str = "//Alice";
+		const BOB: &str = "//Bob";
+		const ALICE_PASSWORD: &str = "alice_password";
+		const BOB_PASSWORD: &str = "bob_password";
+
+		let alice = sp_core::sr25519::Pair::from_string(ALICE, Some(ALICE_PASSWORD)).unwrap();
+		let bob = sp_core::sr25519::Pair::from_string(BOB, Some(BOB_PASSWORD)).unwrap();
+		let bob_with_alice_password = sp_core::sr25519::Pair::from_string(BOB, Some(ALICE_PASSWORD)).unwrap();
+
+		let temp_dir = tempdir::TempDir::new("reads_suri_from_file").unwrap();
+		let mut suri_file_path = temp_dir.path().to_path_buf();
+		let mut password_file_path = temp_dir.path().to_path_buf();
+		suri_file_path.push("suri");
+		password_file_path.push("password");
+		std::fs::write(&suri_file_path, BOB.as_bytes()).unwrap();
+		std::fs::write(&password_file_path, BOB_PASSWORD.as_bytes()).unwrap();
+
+		// when both seed and password are read from file
+		assert_eq!(
+			TargetSigningParams {
+				target_signer: Some(ALICE.into()),
+				target_signer_password: Some(ALICE_PASSWORD.into()),
+
+				target_signer_file: None,
+				target_signer_password_file: None,
+			}
+			.to_keypair::<relay_rialto_client::Rialto>()
+			.map(|p| p.public())
+			.map_err(drop),
+			Ok(alice.public()),
+		);
+
+		// when both seed and password are read from file
+		assert_eq!(
+			TargetSigningParams {
+				target_signer: None,
+				target_signer_password: None,
+
+				target_signer_file: Some(suri_file_path.clone()),
+				target_signer_password_file: Some(password_file_path.clone()),
+			}
+			.to_keypair::<relay_rialto_client::Rialto>()
+			.map(|p| p.public())
+			.map_err(drop),
+			Ok(bob.public()),
+		);
+
+		// when password are is overriden by cli option
+		assert_eq!(
+			TargetSigningParams {
+				target_signer: None,
+				target_signer_password: Some(ALICE_PASSWORD.into()),
+
+				target_signer_file: Some(suri_file_path.clone()),
+				target_signer_password_file: Some(password_file_path.clone()),
+			}
+			.to_keypair::<relay_rialto_client::Rialto>()
+			.map(|p| p.public())
+			.map_err(drop),
+			Ok(bob_with_alice_password.public()),
+		);
+
+		// when both seed and password are overriden by cli options
+		assert_eq!(
+			TargetSigningParams {
+				target_signer: Some(ALICE.into()),
+				target_signer_password: Some(ALICE_PASSWORD.into()),
+
+				target_signer_file: Some(suri_file_path),
+				target_signer_password_file: Some(password_file_path),
+			}
+			.to_keypair::<relay_rialto_client::Rialto>()
+			.map(|p| p.public())
+			.map_err(drop),
+			Ok(alice.public()),
+		);
+	}
 }

bridges/relays/bin-substrate/src/cli/send_message.rs

@@ -60,12 +60,8 @@ pub struct SendMessage {
 	source: SourceConnectionParams,
 	#[structopt(flatten)]
 	source_sign: SourceSigningParams,
-	/// The SURI of secret key to use when transactions are submitted to the Target node.
-	#[structopt(long, required_if("origin", "Target"))]
-	target_signer: Option<String>,
-	/// The password for the SURI of secret key to use when transactions are submitted to the Target node.
-	#[structopt(long)]
-	target_signer_password: Option<String>,
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
 	/// Hex-encoded lane id. Defaults to `00000000`.
 	#[structopt(long, default_value = "00000000")]
 	lane: HexLaneId,
@@ -99,8 +95,7 @@ impl SendMessage {
 		crate::select_full_bridge!(self.bridge, {
 			let SendMessage {
 				source_sign,
-				target_signer,
-				target_signer_password,
+				target_sign,
 				ref mut message,
 				dispatch_fee_payment,
 				dispatch_weight,
@@ -129,12 +124,6 @@ impl SendMessage {
 					match origin {
 						Origins::Source => CallOrigin::SourceAccount(source_account_id),
 						Origins::Target => {
-							let target_sign = TargetSigningParams {
-								target_signer: target_signer.clone().ok_or_else(|| {
-									anyhow::format_err!("The argument target_signer is not available")
-								})?,
-								target_signer_password: target_signer_password.clone(),
-							};
 							let target_sign = target_sign.to_keypair::<Target>()?;
 							let digest = account_ownership_digest(
 								&target_call,
@@ -361,7 +350,7 @@ mod tests {
 	}
 
 	#[test]
-	fn target_signer_must_exist_if_origin_is_target() {
+	fn accepts_send_message_command_without_target_sign_options() {
 		// given
 		let send_message = SendMessage::from_iter_safe(vec![
 			"send-message",
@@ -377,7 +366,7 @@ mod tests {
 			"1234",
 		]);
 
-		assert!(send_message.is_err());
+		assert!(send_message.is_ok());
 	}
 
 	#[test]