Merge pull request #37 from input-output-hk/decode-signed-tx

add debug command to decode signed transaction

Author: NicolasDP

src/debug/mod.rs

@@ -1,7 +1,7 @@
 use cardano::{address::{ExtendedAddr, StakeDistribution}, util::{base58, hex, try_from_slice::{TryFromSlice}}, hash};
 use cardano_storage::utxo;
-use utils::term::Term;
-use std::io::{self, Read};
+use utils::term::{emoji, Term, style::Style};
+use std::{io::{self, Read}, str::FromStr};
 use exe_common::parse_genesis_data;
 
 pub fn command_address( mut term: Term
@@ -61,3 +61,27 @@ pub fn decode_utxos() {
     io::stdin().read_to_end(&mut data).expect("Cannot read stdin.");
     println!("{:?}", utxo::decode_utxo_file(&mut &data[..]).unwrap());
 }
+
+pub fn decode_signed_tx() {
+    let mut data = String::new();
+    io::stdin().read_to_string(&mut data).expect("Cannot read stdin.");
+
+    let bytes = base64::decode(&data).unwrap();
+    let txaux : cardano::tx::TxAux = cbor_event::de::RawCbor::from(&bytes).deserialize_complete().unwrap();
+
+    println!("inputs({})", txaux.tx.inputs.len());
+    for ((i, input), witness) in txaux.tx.inputs.iter().enumerate().zip(txaux.witness.iter()) {
+        let signature_ok = witness.verify_tx(Default::default(), &txaux.tx);
+        let valid = if signature_ok {
+            emoji::CHECK_MARK
+        } else {
+            emoji::CHECK_MARK
+        };
+        println!(" - input ({}) {}.{} {}", i, style!(&input.id), style!(&input.index), valid);
+    }
+
+    println!("outputs({}):", txaux.tx.outputs.len());
+    for (i, output) in txaux.tx.outputs.iter().enumerate() {
+        println!(" - output ({}) {} {}", i, style!(&output.address), style!(&output.value));
+    }
+}

src/lib.rs

@@ -1,14 +1,38 @@
 use std::path::PathBuf;
 
 extern crate dirs;
-extern crate cardano_cli;
-extern crate cardano;
 #[macro_use]
 extern crate log;
 extern crate env_logger;
 
-use self::cardano_cli::utils::term;
-use self::cardano_cli::{blockchain, wallet, transaction, debug};
+extern crate cryptoxide;
+extern crate cbor_event;
+extern crate cardano;
+extern crate exe_common;
+extern crate cardano_storage;
+extern crate storage_units;
+
+extern crate console;
+extern crate dialoguer;
+extern crate indicatif;
+
+#[macro_use]
+extern crate serde_derive;
+extern crate serde;
+extern crate serde_yaml;
+extern crate serde_json;
+extern crate rand;
+extern crate humantime;
+extern crate base64;
+
+#[macro_use]
+mod utils;
+mod blockchain;
+mod wallet;
+mod transaction;
+mod debug;
+
+use utils::term;
 
 #[macro_use]
 extern crate clap;
@@ -1128,6 +1152,9 @@ fn subcommand_debug<'a>(mut term: term::Term, _rootdir: PathBuf, matches: &ArgMa
         ("decode-utxos", Some(_)) => {
             debug::decode_utxos();
         },
+        ("decode-signed-tx", Some(_)) => {
+            debug::decode_signed_tx();
+        },
         _ => {
             term.error(matches.usage()).unwrap();
             ::std::process::exit(1)
@@ -1162,4 +1189,7 @@ fn debug_commands_definition<'a, 'b>() -> App<'a, 'b> {
         .subcommand(SubCommand::with_name("decode-utxos")
             .about("decode and dump a UTXO delta file")
         )
+        .subcommand(SubCommand::with_name("decode-signed-tx")
+            .about("decode a signed transaction (TxAux)")
+        )
 }

src/main.rs

@@ -4,3 +4,5 @@ use console::{Emoji};
 
 pub static PACKAGE: Emoji = Emoji("📦", " ");
 pub static WARN:    Emoji = Emoji("⚠️", " ");
+pub static CHECK_MARK: Emoji = Emoji("✓", "OK");
+pub static CROSS_MARK: Emoji = Emoji("❌", "FAILED");