1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155

// Copyright 2017 The Exonum Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Different assorted utilities.

use std::env;
use std::io::{self, Write};
use std::time::SystemTime;

use log::{Level, Record, SetLoggerError};
use env_logger::{Builder, Formatter};
use colored::*;
use chrono::{DateTime, Local};

use blockchain::{GenesisConfig, ValidatorKeys};
use node::NodeConfig;
use crypto::gen_keypair;

pub use self::types::{Height, Milliseconds, Round, ValidatorId};

mod types;

pub mod fabric;
pub mod config;
pub mod user_agent;
#[macro_use]
pub mod metrics;

/// Performs the logger initialization.
pub fn init_logger() -> Result<(), SetLoggerError> {
    let mut builder = Builder::new();
    builder.format(format_log_record);

    if env::var("RUST_LOG").is_ok() {
        builder.parse(&env::var("RUST_LOG").unwrap());
    }

    builder.try_init()
}

/// Generates testnet configuration.
pub fn generate_testnet_config(count: u8, start_port: u16) -> Vec<NodeConfig> {
    let (validators, services): (Vec<_>, Vec<_>) = (0..count as usize)
        .map(|_| (gen_keypair(), gen_keypair()))
        .unzip();
    let genesis = GenesisConfig::new(validators.iter().zip(services.iter()).map(|x| {
        ValidatorKeys {
            consensus_key: (x.0).0,
            service_key: (x.1).0,
        }
    }));
    let peers = (0..validators.len())
        .map(|x| {
            format!("127.0.0.1:{}", start_port + x as u16)
                .parse()
                .unwrap()
        })
        .collect::<Vec<_>>();

    validators
        .into_iter()
        .zip(services.into_iter())
        .enumerate()
        .map(|(idx, (validator, service))| {
            NodeConfig {
                listen_address: peers[idx],
                external_address: Some(peers[idx]),
                network: Default::default(),
                peers: peers.clone(),
                consensus_public_key: validator.0,
                consensus_secret_key: validator.1,
                service_public_key: service.0,
                service_secret_key: service.1,
                genesis: genesis.clone(),
                whitelist: Default::default(),
                api: Default::default(),
                mempool: Default::default(),
                services_configs: Default::default(),
            }
        })
        .collect::<Vec<_>>()
}

fn has_colors() -> bool {
    use term::terminfo::TerminfoTerminal;
    use term::Terminal;
    use std::io;
    use atty;

    let out = io::stderr();
    match TerminfoTerminal::new(out) {
        Some(ref term) if atty::is(atty::Stream::Stderr) => term.supports_color(),
        _ => false,
    }
}

fn format_time(time: SystemTime) -> String {
    DateTime::<Local>::from(time).to_rfc2822()
}

fn format_log_record(buf: &mut Formatter, record: &Record) -> io::Result<()> {
    let time = format_time(SystemTime::now());

    let verbose_src_path = match env::var("RUST_VERBOSE_PATH") {
        Ok(val) => val.parse::<bool>().unwrap_or(false),
        Err(_) => false,
    };

    let module = record.module_path().unwrap_or("unknown_module");
    let source_path = if verbose_src_path {
        let file = record.file().unwrap_or("unknown_file");
        let line = record.line().unwrap_or(0);
        format!("{}:{}:{}", module, file, line)
    } else {
        module.to_string()
    };

    if has_colors() {
        let level = match record.level() {
            Level::Error => "ERROR".red(),
            Level::Warn => "WARN".yellow(),
            Level::Info => "INFO".green(),
            Level::Debug => "DEBUG".cyan(),
            Level::Trace => "TRACE".white(),
        };
        writeln!(
            buf,
            "{} {} {} {}",
            time.dimmed(),
            level,
            source_path.dimmed(),
            record.args()
        )
    } else {
        let level = match record.level() {
            Level::Error => "ERROR",
            Level::Warn => "WARN",
            Level::Info => "INFO",
            Level::Debug => "DEBUG",
            Level::Trace => "TRACE",
        };
        writeln!(buf, "{} {} {} {}", time, level, &source_path, record.args())
    }
}