feat: works

__crypto/simple_contract/src/cmd_genkey.rs

@@ -0,0 +1,24 @@
+use std::fs;
+use std::fs::File;
+use clap::{App, Arg, ArgMatches, SubCommand};
+use rust_util::failure;
+use crate::{cmd::{Command, CommandError}, util::{JsonKeyPair, make_key_pair}};
+pub struct CommandImpl;
+impl Command for CommandImpl {
+    fn name(&self) -> &str { "genkey" }
+    fn subcommand<'a>(&self) -> App<'a, 'a> {
+        SubCommand::with_name(self.name()).about("Generate key pair subcommand")
+            .arg(Arg::with_name("output").long("output").short("o").required(true).takes_value(true).help("Key pair output"))
+    }
+    fn run(&self, _arg_matches: &ArgMatches, sub_arg_matches: &ArgMatches) -> CommandError {
+        let output = sub_arg_matches.value_of("output").unwrap();
+        if let Ok(_) = File::open(output) {
+            failure!("Output file exists: {}", output);
+            return Ok(());
+        }
+        let (pri_key, pub_key) = make_key_pair();
+        let json_key_pair = JsonKeyPair::from(pri_key, pub_key);
+        fs::write(output, json_key_pair.to_json()?.as_bytes())?;
+        Ok(())
+    }
+}