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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 integration
import (
"errors"
"time"
"github.com/dexon-foundation/dexon-consensus/core"
"github.com/dexon-foundation/dexon-consensus/core/crypto"
"github.com/dexon-foundation/dexon-consensus/core/db"
"github.com/dexon-foundation/dexon-consensus/core/test"
"github.com/dexon-foundation/dexon-consensus/core/types"
)
func genRoundEndTimes(
configs []*types.Config, dMoment time.Time) (ends []time.Time) {
now := dMoment
for _, config := range configs {
now = now.Add(config.RoundInterval)
ends = append(ends, now)
}
return
}
// loadAllConfigs loads all prepared configuration from governance,
// starts from round 0.
func loadAllConfigs(gov core.Governance) (configs []*types.Config) {
var round uint64
for {
config := gov.Configuration(round)
if config == nil {
break
}
configs = append(configs, config)
round++
}
return
}
// decideOwnChains compute which chainIDs belongs to this node.
func decideOwnChains(numChains uint32, numNodes, id int) (own []uint32) {
var cur = uint32(id)
if numNodes == 0 {
panic(errors.New("attempt to arrange chains on 0 nodes"))
}
for {
if cur >= numChains {
break
}
own = append(own, cur)
cur += uint32(numNodes)
}
return
}
// PrepareNodes setups nodes for testing.
func PrepareNodes(
gov *test.Governance,
prvKeys []crypto.PrivateKey,
maxNumChains uint32,
networkLatency, proposingLatency test.LatencyModel) (
nodes map[types.NodeID]*Node, err error) {
if maxNumChains == 0 {
err = errors.New("zero NumChains is unexpected")
return
}
// Setup nodes, count of nodes is derived from the count of private keys
// hold in Governance.
nodes = make(map[types.NodeID]*Node)
dMoment := time.Now().UTC()
broadcastTargets := make(map[types.NodeID]struct{})
for idx, prvKey := range prvKeys {
nID := types.NewNodeID(prvKey.PublicKey())
broadcastTargets[nID] = struct{}{}
// Decides which chains are owned by this node.
if nodes[nID], err = newNode(
gov,
prvKey,
dMoment,
decideOwnChains(maxNumChains, len(prvKeys), idx),
networkLatency,
proposingLatency); err != nil {
return
}
}
// Assign broadcast targets.
for _, n := range nodes {
n.setBroadcastTargets(broadcastTargets)
n.gov().State().SwitchToRemoteMode()
}
return
}
// VerifyApps is a helper to check delivery between test.Apps
func VerifyApps(apps map[types.NodeID]*test.App) (err error) {
for vFrom, fromApp := range apps {
if err = fromApp.Verify(); err != nil {
return
}
for vTo, toApp := range apps {
if vFrom == vTo {
continue
}
if err = fromApp.Compare(toApp); err != nil {
return
}
}
}
return
}
// CollectAppAndDBFromNodes collects test.App and db.Database
// from nodes.
func CollectAppAndDBFromNodes(nodes map[types.NodeID]*Node) (
apps map[types.NodeID]*test.App,
dbs map[types.NodeID]db.Database) {
apps = make(map[types.NodeID]*test.App)
dbs = make(map[types.NodeID]db.Database)
for nID, node := range nodes {
apps[nID] = node.app()
dbs[nID] = node.db()
}
return
}
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