235 lines
7.3 KiB
Go
235 lines
7.3 KiB
Go
package simulation
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"math/rand"
|
|
"sort"
|
|
"testing"
|
|
"time"
|
|
|
|
abci "github.com/tendermint/tendermint/abci/types"
|
|
"github.com/tendermint/tendermint/crypto"
|
|
tmtypes "github.com/tendermint/tendermint/types"
|
|
|
|
"github.com/cosmos/cosmos-sdk/baseapp"
|
|
sdk "github.com/cosmos/cosmos-sdk/types"
|
|
"github.com/cosmos/cosmos-sdk/x/mock"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
// Simulate tests application by sending random messages.
|
|
func Simulate(
|
|
t *testing.T, app *baseapp.BaseApp, appStateFn func(r *rand.Rand, keys []crypto.PrivKey, accs []sdk.AccAddress) json.RawMessage, ops []TestAndRunTx, setups []RandSetup,
|
|
invariants []Invariant, numBlocks int, blockSize int, commit bool,
|
|
) {
|
|
time := time.Now().UnixNano()
|
|
SimulateFromSeed(t, app, appStateFn, time, ops, setups, invariants, numBlocks, blockSize, commit)
|
|
}
|
|
|
|
// SimulateFromSeed tests an application by running the provided
|
|
// operations, testing the provided invariants, but using the provided seed.
|
|
func SimulateFromSeed(
|
|
t *testing.T, app *baseapp.BaseApp, appStateFn func(r *rand.Rand, keys []crypto.PrivKey, accs []sdk.AccAddress) json.RawMessage, seed int64, ops []TestAndRunTx, setups []RandSetup,
|
|
invariants []Invariant, numBlocks int, blockSize int, commit bool,
|
|
) {
|
|
log := fmt.Sprintf("Starting SimulateFromSeed with randomness created with seed %d", int(seed))
|
|
fmt.Printf("%s\n", log)
|
|
r := rand.New(rand.NewSource(seed))
|
|
keys, accs := mock.GeneratePrivKeyAddressPairsFromRand(r, numKeys)
|
|
|
|
// Setup event stats
|
|
events := make(map[string]uint)
|
|
event := func(what string) {
|
|
log += "\nevent - " + what
|
|
events[what]++
|
|
}
|
|
|
|
timestamp := time.Unix(0, 0)
|
|
timeDiff := maxTimePerBlock - minTimePerBlock
|
|
|
|
res := app.InitChain(abci.RequestInitChain{AppStateBytes: appStateFn(r, keys, accs)})
|
|
validators := make(map[string]mockValidator)
|
|
for _, validator := range res.Validators {
|
|
validators[string(validator.Address)] = mockValidator{validator, GetMemberOfInitialState(r, initialLivenessWeightings)}
|
|
}
|
|
|
|
for i := 0; i < len(setups); i++ {
|
|
setups[i](r, keys)
|
|
}
|
|
|
|
header := abci.Header{Height: 0, Time: timestamp}
|
|
opCount := 0
|
|
|
|
request := abci.RequestBeginBlock{Header: header}
|
|
|
|
var pastTimes []time.Time
|
|
|
|
for i := 0; i < numBlocks; i++ {
|
|
|
|
// Log the header time for future lookup
|
|
pastTimes = append(pastTimes, header.Time)
|
|
|
|
// Run the BeginBlock handler
|
|
app.BeginBlock(request)
|
|
|
|
log += "\nBeginBlock"
|
|
|
|
// Make sure invariants hold at beginning of block
|
|
AssertAllInvariants(t, app, invariants, log)
|
|
|
|
ctx := app.NewContext(false, header)
|
|
|
|
var thisBlockSize int
|
|
load := r.Float64()
|
|
switch {
|
|
case load < 0.33:
|
|
thisBlockSize = 0
|
|
case load < 0.66:
|
|
thisBlockSize = r.Intn(blockSize * 2)
|
|
default:
|
|
thisBlockSize = r.Intn(blockSize * 4)
|
|
}
|
|
for j := 0; j < thisBlockSize; j++ {
|
|
logUpdate, err := ops[r.Intn(len(ops))](t, r, app, ctx, keys, log, event)
|
|
log += "\n" + logUpdate
|
|
|
|
require.Nil(t, err, log)
|
|
if onOperation {
|
|
AssertAllInvariants(t, app, invariants, log)
|
|
}
|
|
if opCount%200 == 0 {
|
|
fmt.Printf("\rSimulating... block %d/%d, operation %d.", header.Height, numBlocks, opCount)
|
|
}
|
|
opCount++
|
|
}
|
|
|
|
res := app.EndBlock(abci.RequestEndBlock{})
|
|
if commit {
|
|
app.Commit()
|
|
}
|
|
header.Height++
|
|
header.Time = header.Time.Add(time.Duration(minTimePerBlock) * time.Second).Add(time.Duration(int64(r.Intn(int(timeDiff)))) * time.Second)
|
|
|
|
log += "\nEndBlock"
|
|
|
|
// Make sure invariants hold at end of block
|
|
AssertAllInvariants(t, app, invariants, log)
|
|
|
|
// Generate a random RequestBeginBlock with the current validator set for the next block
|
|
request = RandomRequestBeginBlock(t, r, validators, livenessTransitionMatrix, evidenceFraction, pastTimes, event, header, log)
|
|
|
|
// Update the validator set
|
|
validators = updateValidators(t, r, validators, res.ValidatorUpdates, event)
|
|
}
|
|
|
|
fmt.Printf("\nSimulation complete. Final height (blocks): %d, final time (seconds): %v\n", header.Height, header.Time)
|
|
DisplayEvents(events)
|
|
}
|
|
|
|
func getKeys(validators map[string]mockValidator) []string {
|
|
keys := make([]string, len(validators))
|
|
i := 0
|
|
for key := range validators {
|
|
keys[i] = key
|
|
i++
|
|
}
|
|
sort.Strings(keys)
|
|
return keys
|
|
}
|
|
|
|
// RandomRequestBeginBlock generates a list of signing validators according to the provided list of validators, signing fraction, and evidence fraction
|
|
func RandomRequestBeginBlock(t *testing.T, r *rand.Rand, validators map[string]mockValidator, livenessTransitions TransitionMatrix, evidenceFraction float64,
|
|
pastTimes []time.Time, event func(string), header abci.Header, log string) abci.RequestBeginBlock {
|
|
if len(validators) == 0 {
|
|
return abci.RequestBeginBlock{Header: header}
|
|
}
|
|
signingValidators := make([]abci.SigningValidator, len(validators))
|
|
i := 0
|
|
|
|
for _, key := range getKeys(validators) {
|
|
mVal := validators[key]
|
|
mVal.livenessState = livenessTransitions.NextState(r, mVal.livenessState)
|
|
signed := true
|
|
|
|
if mVal.livenessState == 1 {
|
|
// spotty connection, 50% probability of success
|
|
// See https://github.com/golang/go/issues/23804#issuecomment-365370418
|
|
// for reasoning behind computing like this
|
|
signed = r.Int63()%2 == 0
|
|
} else if mVal.livenessState == 2 {
|
|
// offline
|
|
signed = false
|
|
}
|
|
if signed {
|
|
event("beginblock/signing/signed")
|
|
} else {
|
|
event("beginblock/signing/missed")
|
|
}
|
|
signingValidators[i] = abci.SigningValidator{
|
|
Validator: mVal.val,
|
|
SignedLastBlock: signed,
|
|
}
|
|
i++
|
|
}
|
|
evidence := make([]abci.Evidence, 0)
|
|
for r.Float64() < evidenceFraction {
|
|
height := header.Height
|
|
time := header.Time
|
|
if r.Float64() < pastEvidenceFraction {
|
|
height = int64(r.Intn(int(header.Height)))
|
|
time = pastTimes[height]
|
|
}
|
|
validator := signingValidators[r.Intn(len(signingValidators))].Validator
|
|
var currentTotalVotingPower int64
|
|
for _, mVal := range validators {
|
|
currentTotalVotingPower += mVal.val.Power
|
|
}
|
|
evidence = append(evidence, abci.Evidence{
|
|
Type: tmtypes.ABCIEvidenceTypeDuplicateVote,
|
|
Validator: validator,
|
|
Height: height,
|
|
Time: time,
|
|
TotalVotingPower: currentTotalVotingPower,
|
|
})
|
|
event("beginblock/evidence")
|
|
}
|
|
return abci.RequestBeginBlock{
|
|
Header: header,
|
|
LastCommitInfo: abci.LastCommitInfo{
|
|
Validators: signingValidators,
|
|
},
|
|
ByzantineValidators: evidence,
|
|
}
|
|
}
|
|
|
|
// AssertAllInvariants asserts a list of provided invariants against application state
|
|
func AssertAllInvariants(t *testing.T, app *baseapp.BaseApp, tests []Invariant, log string) {
|
|
for i := 0; i < len(tests); i++ {
|
|
tests[i](t, app, log)
|
|
}
|
|
}
|
|
|
|
// updateValidators mimicks Tendermint's update logic
|
|
func updateValidators(t *testing.T, r *rand.Rand, current map[string]mockValidator, updates []abci.Validator, event func(string)) map[string]mockValidator {
|
|
for _, update := range updates {
|
|
switch {
|
|
case update.Power == 0:
|
|
require.NotNil(t, current[string(update.PubKey.Data)], "tried to delete a nonexistent validator")
|
|
event("endblock/validatorupdates/kicked")
|
|
delete(current, string(update.PubKey.Data))
|
|
default:
|
|
// Does validator already exist?
|
|
if mVal, ok := current[string(update.PubKey.Data)]; ok {
|
|
mVal.val = update
|
|
event("endblock/validatorupdates/updated")
|
|
} else {
|
|
// Set this new validator
|
|
current[string(update.PubKey.Data)] = mockValidator{update, GetMemberOfInitialState(r, initialLivenessWeightings)}
|
|
event("endblock/validatorupdates/added")
|
|
}
|
|
}
|
|
}
|
|
return current
|
|
}
|