add wallet unpack command (#433)

api/src/owner.rs

@@ -2123,6 +2123,7 @@ where
 	///
 	/// * `keychain_mask` - Wallet secret mask to XOR against the stored wallet seed before using
 	/// * `slatepack` - A string representing an armored slatepack
+	/// * `decrypt` - If true and the slatepack message content is encrypted, attempt to decrypt
 	///
 	/// # Returns
 	/// * Ok with a [Slatepack](../grin_wallet_libwallet/slatepack/types/struct.Slatepack.html) if successful
@@ -2142,13 +2143,18 @@ where
 	/// # let slatepack_string = String::from("");
 	/// // .. receive a slatepack from somewhere
 	/// let res = api_owner.decode_slatepack_message(
-	///    slatepack_string
+	///    slatepack_string,
+	///    false,
 	/// );
 	///
 	/// ```
 
-	pub fn decode_slatepack_message(&self, slatepack: String) -> Result<Slatepack, Error> {
-		owner::decode_slatepack_message(slatepack)
+	pub fn decode_slatepack_message(
+		&self,
+		slatepack: String,
+		decrypt: bool,
+	) -> Result<Slatepack, Error> {
+		owner::decode_slatepack_message(slatepack, decrypt)
 	}
 
 	// PAYMENT PROOFS

api/src/owner_rpc.rs

@@ -1577,7 +1577,8 @@ pub trait OwnerRpc {
 		"jsonrpc": "2.0",
 		"method": "decode_slatepack_message",
 		"params": {
-			"message": "BEGINSLATEPACK. 8GQrdcwdLKJD28F 3a9siP7ZhZgAh7w\nBR2EiZHza5WMWmZ Cc8zBUemrrYRjhq j3VBwA8vYnvXXKU\nBDmQBN2yKgmR8mX UzvXHezfznA61d7 qFZYChhz94vd8Ew\nNEPLz7jmcVN2C3w wrfHbeiLubYozP2 uhLouFiYRrbe3fQ\n4uhWGfT3sQYXScT dAeo29EaZJpfauh j8VL5jsxST2SPHq\nnzXFC2w9yYVjt7D ju7GSgHEp5aHz9R xstGbHjbsb4JQod\nkYLuELta1ohUwDD pvjhyJmsbLcsPei k5AQhZsJ8RJGBtY\nbou6cU7tZeFJvor 4LB9CBfFB3pmVWD vSLd5RPS75dcnHP\nnbXD8mSDZ8hJS2Q A9wgvppWzuWztJ2 dLUU8f9tLJgsRBw\nYZAs71HiVeg7. ENDSLATEPACK.\n"
+			"message": "BEGINSLATEPACK. 8GQrdcwdLKJD28F 3a9siP7ZhZgAh7w\nBR2EiZHza5WMWmZ Cc8zBUemrrYRjhq j3VBwA8vYnvXXKU\nBDmQBN2yKgmR8mX UzvXHezfznA61d7 qFZYChhz94vd8Ew\nNEPLz7jmcVN2C3w wrfHbeiLubYozP2 uhLouFiYRrbe3fQ\n4uhWGfT3sQYXScT dAeo29EaZJpfauh j8VL5jsxST2SPHq\nnzXFC2w9yYVjt7D ju7GSgHEp5aHz9R xstGbHjbsb4JQod\nkYLuELta1ohUwDD pvjhyJmsbLcsPei k5AQhZsJ8RJGBtY\nbou6cU7tZeFJvor 4LB9CBfFB3pmVWD vSLd5RPS75dcnHP\nnbXD8mSDZ8hJS2Q A9wgvppWzuWztJ2 dLUU8f9tLJgsRBw\nYZAs71HiVeg7. ENDSLATEPACK.\n",
+			"decrypt" : false
 		},
 		"id": 1
 	}
@@ -1601,7 +1602,11 @@ pub trait OwnerRpc {
 	```
 	*/
 
-	fn decode_slatepack_message(&self, message: String) -> Result<Slatepack, ErrorKind>;
+	fn decode_slatepack_message(
+		&self,
+		message: String,
+		decrypt: bool,
+	) -> Result<Slatepack, ErrorKind>;
 
 	/**
 	Networked version of [Owner::retrieve_payment_proof](struct.Owner.html#method.retrieve_payment_proof).
@@ -2069,8 +2074,12 @@ where
 		Ok(VersionedSlate::into_version(slate, version).map_err(|e| e.kind())?)
 	}
 
-	fn decode_slatepack_message(&self, message: String) -> Result<Slatepack, ErrorKind> {
-		Owner::decode_slatepack_message(self, message).map_err(|e| e.kind())
+	fn decode_slatepack_message(
+		&self,
+		message: String,
+		decrypt: bool,
+	) -> Result<Slatepack, ErrorKind> {
+		Owner::decode_slatepack_message(self, message, decrypt).map_err(|e| e.kind())
 	}
 
 	fn retrieve_payment_proof(

controller/src/command.rs

@@ -23,7 +23,7 @@ use crate::impls::SlateGetter as _;
 use crate::impls::{HttpSlateSender, PathToSlate, PathToSlatepack, SlatePutter};
 use crate::keychain;
 use crate::libwallet::{
-	self, InitTxArgs, IssueInvoiceTxArgs, NodeClient, PaymentProof, Slate, SlateVersion,
+	self, InitTxArgs, IssueInvoiceTxArgs, NodeClient, PaymentProof, Slate, SlateVersion, Slatepack,
 	SlatepackAddress, Slatepacker, SlatepackerArgs, WalletLCProvider,
 };
 use crate::util::secp::key::SecretKey;
@@ -603,7 +603,7 @@ where
 					});
 					let pts = PathToSlatepack::new(f.into(), &packer, true);
 					sl = Some(pts.get_tx()?.0);
-					ret_address = pts.get_slatepack()?.sender;
+					ret_address = pts.get_slatepack(true)?.sender;
 					Ok(())
 				})?;
 			}
@@ -626,7 +626,7 @@ where
 						|api, m| {
 							slate =
 								api.slate_from_slatepack_message(m, message.clone(), vec![0])?;
-							let slatepack = api.decode_slatepack_message(message)?;
+							let slatepack = api.decode_slatepack_message(message, true)?;
 							ret_address = slatepack.sender;
 							Ok(())
 						},
@@ -713,6 +713,84 @@ where
 	}
 }
 
+pub fn unpack<L, C, K>(
+	owner_api: &mut Owner<L, C, K>,
+	keychain_mask: Option<&SecretKey>,
+	args: ReceiveArgs,
+) -> Result<(), Error>
+where
+	L: WalletLCProvider<'static, C, K> + 'static,
+	C: NodeClient + 'static,
+	K: keychain::Keychain + 'static,
+{
+	let mut slatepack = match args.input_file {
+		Some(f) => {
+			let packer = Slatepacker::new(SlatepackerArgs {
+				sender: None,
+				recipients: vec![],
+				dec_key: None,
+			});
+			PathToSlatepack::new(f.into(), &packer, true).get_slatepack(false)?
+		}
+		None => match args.input_slatepack_message {
+			Some(mes) => {
+				let mut sp = Slatepack::default();
+				controller::owner_single_use(None, keychain_mask, Some(owner_api), |api, _| {
+					sp = api.decode_slatepack_message(mes, false)?;
+					Ok(())
+				})?;
+				sp
+			}
+			None => {
+				return Err(ErrorKind::ArgumentError("Invalid Slatepack Input".into()).into());
+			}
+		},
+	};
+	println!();
+	println!("SLATEPACK CONTENTS");
+	println!("------------------");
+	println!("{}", slatepack);
+	println!("------------------");
+
+	let packer = Slatepacker::new(SlatepackerArgs {
+		sender: None,
+		recipients: vec![],
+		dec_key: None,
+	});
+
+	if slatepack.mode == 1 {
+		controller::owner_single_use(None, keychain_mask, Some(owner_api), |api, m| {
+			let dec_key = api.get_slatepack_secret_key(m, 0)?;
+			match slatepack.try_decrypt_payload(Some(&dec_key)) {
+				Ok(_) => {
+					println!("Slatepack is encrypted for this wallet");
+					println!();
+					println!("DECRYPTED SLATEPACK");
+					println!("-------------------");
+					println!("{}", slatepack);
+					let slate = packer.get_slate(&slatepack)?;
+					println!();
+					println!("DECRYPTED SLATE");
+					println!("---------------");
+					println!("{}", slate);
+				}
+				Err(_) => {
+					println!("Slatepack payload cannot be decrypted by this wallet");
+				}
+			}
+			Ok(())
+		})?;
+	} else {
+		let slate = packer.get_slate(&slatepack)?;
+		println!("Slatepack is not encrypted");
+		println!();
+		println!("SLATE");
+		println!("-----");
+		println!("{}", slate);
+	}
+	Ok(())
+}
+
 /// Finalize command args
 #[derive(Clone)]
 pub struct FinalizeArgs {

controller/tests/slatepack.rs

@@ -72,7 +72,7 @@ fn slate_from_packed(
 	if armored {
 		file = format!("{}.armored", file);
 	}
-	let slatepack = PathToSlatepack::new(file.into(), &packer, armored).get_slatepack()?;
+	let slatepack = PathToSlatepack::new(file.into(), &packer, armored).get_slatepack(true)?;
 	Ok((slatepack.clone(), packer.get_slate(&slatepack)?))
 }
 
@@ -496,7 +496,7 @@ fn slatepack_api_impl(test_dir: &'static str) -> Result<(), libwallet::Error> {
 		let enc_addr = api.get_slatepack_address(m, 0)?;
 		let slatepack = api.create_slatepack_message(m, &slate, Some(0), vec![enc_addr])?;
 		println!("{}", slatepack);
-		let slatepack_raw = api.decode_slatepack_message(slatepack.clone())?;
+		let slatepack_raw = api.decode_slatepack_message(slatepack.clone(), true)?;
 		println!("{}", slatepack_raw);
 		let decoded_slate = api.slate_from_slatepack_message(m, slatepack, vec![0])?;
 		println!("{}", decoded_slate);

impls/src/adapters/slatepack.rs

@@ -45,9 +45,9 @@ impl<'a> PathToSlatepack<'a> {
 		Ok(data)
 	}
 
-	pub fn get_slatepack(&self) -> Result<Slatepack, Error> {
+	pub fn get_slatepack(&self, decrypt: bool) -> Result<Slatepack, Error> {
 		let data = self.get_slatepack_file_contents()?;
-		self.packer.deser_slatepack(data)
+		self.packer.deser_slatepack(data, decrypt)
 	}
 }
 
@@ -80,7 +80,7 @@ impl<'a> SlatePutter for PathToSlatepack<'a> {
 impl<'a> SlateGetter for PathToSlatepack<'a> {
 	fn get_tx(&self) -> Result<(Slate, bool), Error> {
 		let data = self.get_slatepack_file_contents()?;
-		let slatepack = self.packer.deser_slatepack(data)?;
+		let slatepack = self.packer.deser_slatepack(data, true)?;
 		Ok((self.packer.get_slate(&slatepack)?, true))
 	}
 }

libwallet/src/api_impl/owner.rs

@@ -169,7 +169,7 @@ where
 			recipients: vec![],
 			dec_key: None,
 		});
-		let slatepack = packer.deser_slatepack(slatepack.as_bytes().to_vec())?;
+		let slatepack = packer.deser_slatepack(slatepack.as_bytes().to_vec(), true)?;
 		return packer.get_slate(&slatepack);
 	} else {
 		for index in secret_indices {
@@ -183,7 +183,7 @@ where
 				recipients: vec![],
 				dec_key: (&dec_key).as_ref(),
 			});
-			let res = packer.deser_slatepack(slatepack.as_bytes().to_vec());
+			let res = packer.deser_slatepack(slatepack.as_bytes().to_vec(), true);
 			let slatepack = match res {
 				Ok(sp) => sp,
 				Err(_) => {
@@ -201,13 +201,13 @@ where
 }
 
 /// Decode a slatepack message, to allow viewing
-pub fn decode_slatepack_message(slatepack: String) -> Result<Slatepack, Error> {
+pub fn decode_slatepack_message(slatepack: String, decrypt: bool) -> Result<Slatepack, Error> {
 	let packer = Slatepacker::new(SlatepackerArgs {
 		sender: None,
 		recipients: vec![],
 		dec_key: None,
 	});
-	packer.deser_slatepack(slatepack.as_bytes().to_vec())
+	packer.deser_slatepack(slatepack.as_bytes().to_vec(), decrypt)
 }
 
 /// retrieve outputs

libwallet/src/slatepack/packer.rs

@@ -47,7 +47,7 @@ impl<'a> Slatepacker<'a> {
 	}
 
 	/// return slatepack
-	pub fn deser_slatepack(&self, data: Vec<u8>) -> Result<Slatepack, Error> {
+	pub fn deser_slatepack(&self, data: Vec<u8>, decrypt: bool) -> Result<Slatepack, Error> {
 		// check if data is armored, if so, remove and continue
 		if data.len() < super::armor::HEADER.len() {
 			let msg = format!("Data too short");
@@ -90,7 +90,9 @@ impl<'a> Slatepacker<'a> {
 		};
 
 		slatepack.ver_check_warn();
-		slatepack.try_decrypt_payload(self.0.dec_key)?;
+		if decrypt {
+			slatepack.try_decrypt_payload(self.0.dec_key)?;
+		}
 		Ok(slatepack)
 	}
 

src/bin/grin-wallet.yml

@@ -88,7 +88,7 @@ subcommands:
             long: run_foreign
             takes_value: false
   - send:
-      about: Builds a transaction to send coins and sends to the specified listener directly
+      about: Builds a transaction to send coins and sends to the recipient via the Slatepack workflow
       args:
         - amount:
             help: Number of coins to send with optional fraction, e.g. 12.423
@@ -119,7 +119,7 @@ subcommands:
             default_value: "1"
             takes_value: true
         - dest:
-            help: Send the transaction to the provided server (start with http://) or save as file.
+            help: Intended recipient's Slatepack Address (or http listener address (DEPRECATED))
             short: d
             long: dest
             takes_value: true
@@ -146,16 +146,24 @@ subcommands:
             help: Output a V4 slate prior to HF3 block
             long: v4
             takes_value: false
+  - unpack:
+      about: Unpack and display an armored Slatepack Message, decrypting if possible
+      args:
+        - input:
+            help: File containing a Slatepack Message
+            short: i
+            long: input
+            takes_value: true
   - receive:
-      about: Processes a transaction file to accept a transfer from a sender
+      about: Processes a Slatepack Message to accept a transfer from a sender
       args:
         - input:
-            help: Partial transaction to process, expects the sender's transaction file.
+            help: File containing a Slatepack Message
             short: i
             long: input
             takes_value: true
   - finalize:
-      about: Processes a receiver's transaction file to finalize a transfer.
+      about: Processes a Slatepack Message to finalize a transfer.
       args:
         - input:
             help: Partial transaction to process, expects the receiver's transaction file.
@@ -171,13 +179,13 @@ subcommands:
             short: n
             long: nopost
   - invoice:
-      about: Initialize an invoice transaction.
+      about: Initialize an invoice transaction, outputting a Slatepack Message with the result
       args:
         - amount:
             help: Number of coins to invoice  with optional fraction, e.g. 12.423
             index: 1
         - dest:
-            help: Name of destination slate output file
+            help: Intended recipient's Slatepack Address
             short: d
             long: dest
             takes_value: true
@@ -209,12 +217,12 @@ subcommands:
             short: e
             long: estimate-selection
         - dest:
-            help: Send the transaction to the provided server (start with http://) or save as file.
+            help: The Slatepack address of the invoicing party's wallet (will override the address contained in the Slatepack)
             short: d
             long: dest
             takes_value: true
         - input:
-            help: Partial transaction to process, expects the invoicer's transaction file.
+            help: Incoming Slatepack Message to process
             short: i
             long: input
             takes_value: true

src/cmd/wallet_args.rs

@@ -569,6 +569,32 @@ pub fn parse_receive_args(args: &ArgMatches) -> Result<command::ReceiveArgs, Par
 	})
 }
 
+pub fn parse_unpack_args(args: &ArgMatches) -> Result<command::ReceiveArgs, ParseError> {
+	// input file
+	let input_file = match args.is_present("input") {
+		true => {
+			let file = args.value_of("input").unwrap().to_owned();
+			// validate input
+			if !Path::new(&file).is_file() {
+				let msg = format!("File {} not found.", &file);
+				return Err(ParseError::ArgumentError(msg));
+			}
+			Some(file)
+		}
+		false => None,
+	};
+
+	let mut input_slatepack_message = None;
+	if input_file.is_none() {
+		input_slatepack_message = Some(prompt_slatepack()?);
+	}
+
+	Ok(command::ReceiveArgs {
+		input_file,
+		input_slatepack_message,
+	})
+}
+
 pub fn parse_finalize_args(args: &ArgMatches) -> Result<command::FinalizeArgs, ParseError> {
 	let fluff = args.is_present("fluff");
 	let nopost = args.is_present("nopost");
@@ -1134,6 +1160,10 @@ where
 				test_mode,
 			)
 		}
+		("unpack", Some(args)) => {
+			let a = arg_parse!(parse_unpack_args(&args));
+			command::unpack(owner_api, km, a)
+		}
 		("finalize", Some(args)) => {
 			let a = arg_parse!(parse_finalize_args(&args));
 			command::finalize(owner_api, km, a)