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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package config
import (
"fmt"
"math"
"os"
"gitlab.com/byzantine-lab/tangerine-consensus/core"
"gitlab.com/byzantine-lab/tangerine-consensus/core/test"
"github.com/naoina/toml"
)
// Consensus settings.
type Consensus struct {
GenesisCRS string `toml:"genesis_crs"`
LambdaBA int `toml:"lambda_ba"`
LambdaDKG int `toml:"lambda_dkg"`
RoundLength int
NotarySetSize uint32
DKGSetSize uint32 `toml:"dkg_set_size"`
MinBlockInterval int
}
// Legacy config.
type Legacy struct {
ProposeIntervalMean float64
ProposeIntervalSigma float64
}
// Node config for the simulation.
type Node struct {
Consensus Consensus
Legacy Legacy
Num uint32
MaxBlock uint64
Changes []Change
}
// LatencyModel for ths simulation.
type LatencyModel struct {
Mean float64
Sigma float64
}
// Networking config.
type Networking struct {
Type test.NetworkType
PeerServer string
Direct LatencyModel
Gossip LatencyModel
}
// Scheduler Settings.
type Scheduler struct {
WorkerNum int
}
// Change represent future configuration changes.
type Change struct {
Round uint64
Type string
Value string
}
// RegisterChange reigster this change to a test.Governance instance.
func (c Change) RegisterChange(gov *test.Governance) error {
if c.Round < core.ConfigRoundShift {
panic(fmt.Errorf(
"attempt to register config change that never be executed: %v",
c.Round))
}
t := StateChangeTypeFromString(c.Type)
return gov.RegisterConfigChange(
c.Round, t, StateChangeValueFromString(t, c.Value))
}
// Config represents the configuration for simulation.
type Config struct {
Title string
Node Node
Networking Networking
Scheduler Scheduler
}
// GenerateDefault generates a default configuration file.
func GenerateDefault(path string) error {
f, err := os.Create(path)
if err != nil {
return err
}
defer f.Close()
config := Config{
Title: "DEXON Consensus Simulation Config",
Node: Node{
Consensus: Consensus{
GenesisCRS: "In DEXON we trust.",
LambdaBA: 250,
LambdaDKG: 1000,
RoundLength: 1000,
NotarySetSize: 7,
DKGSetSize: 7,
MinBlockInterval: 750,
},
Legacy: Legacy{
ProposeIntervalMean: 500,
ProposeIntervalSigma: 50,
},
Num: 7,
MaxBlock: math.MaxUint64,
},
Networking: Networking{
Type: test.NetworkTypeTCPLocal,
PeerServer: "127.0.0.1",
Direct: LatencyModel{
Mean: 100,
Sigma: 10,
},
Gossip: LatencyModel{
Mean: 300,
Sigma: 25,
},
},
Scheduler: Scheduler{
WorkerNum: 2,
},
}
if err := toml.NewEncoder(f).Encode(&config); err != nil {
return err
}
return nil
}
// Read reads the config from a file.
func Read(path string) (*Config, error) {
f, err := os.Open(path) // #nosec G304
if err != nil {
return nil, err
}
defer f.Close()
var config Config
if err := toml.NewDecoder(f).Decode(&config); err != nil {
return nil, err
}
return &config, nil
}
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