2018-07-16 18:25:15 -07:00
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package simulation
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2018-07-16 18:15:50 -07:00
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import (
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2018-07-17 16:27:51 -07:00
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"fmt"
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"math/rand"
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2018-09-11 02:18:58 -07:00
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"os"
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2018-09-09 08:34:09 -07:00
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"strings"
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"testing"
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"time"
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"github.com/cosmos/cosmos-sdk/baseapp"
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2018-07-16 18:15:50 -07:00
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)
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2018-11-07 08:57:53 -08:00
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func getTestingMode(tb testing.TB) (testingMode bool, t *testing.T, b *testing.B) {
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testingMode = false
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if _t, ok := tb.(*testing.T); ok {
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t = _t
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testingMode = true
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} else {
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b = tb.(*testing.B)
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}
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return
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}
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2018-09-09 08:34:09 -07:00
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// Builds a function to add logs for this particular block
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2018-11-07 21:22:16 -08:00
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func addLogMessage(testingmode bool,
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blockLogBuilders []*strings.Builder, height int) func(string) {
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if !testingmode {
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return func(_ string) {}
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}
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blockLogBuilders[height] = &strings.Builder{}
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return func(x string) {
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(*blockLogBuilders[height]).WriteString(x)
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(*blockLogBuilders[height]).WriteString("\n")
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}
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}
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// Creates a function to print out the logs
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func logPrinter(testingmode bool, logs []*strings.Builder) func() {
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if !testingmode {
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return func() {}
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}
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return func() {
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numLoggers := 0
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for i := 0; i < len(logs); i++ {
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// We're passed the last created block
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if logs[i] == nil {
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numLoggers = i
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break
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2018-09-11 02:18:58 -07:00
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}
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}
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2018-11-07 07:28:18 -08:00
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2018-11-07 21:22:16 -08:00
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var f *os.File
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if numLoggers > 10 {
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fileName := fmt.Sprintf("simulation_log_%s.txt",
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time.Now().Format("2006-01-02 15:04:05"))
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fmt.Printf("Too many logs to display, instead writing to %s\n",
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fileName)
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f, _ = os.Create(fileName)
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}
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2018-11-07 21:22:16 -08:00
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for i := 0; i < numLoggers; i++ {
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if f == nil {
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fmt.Printf("Begin block %d\n", i+1)
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fmt.Println((*logs[i]).String())
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continue
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}
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_, err := f.WriteString(fmt.Sprintf("Begin block %d\n", i+1))
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if err != nil {
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panic("Failed to write logs to file")
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}
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_, err = f.WriteString((*logs[i]).String())
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if err != nil {
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panic("Failed to write logs to file")
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2018-09-09 08:34:09 -07:00
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}
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}
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}
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}
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2018-11-08 07:32:53 -08:00
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// getBlockSize returns a block size as determined from the transition matrix.
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// It targets making average block size the provided parameter. The three
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// states it moves between are:
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// - "over stuffed" blocks with average size of 2 * avgblocksize,
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// - normal sized blocks, hitting avgBlocksize on average,
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// - and empty blocks, with no txs / only txs scheduled from the past.
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func getBlockSize(r *rand.Rand, params Params,
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lastBlockSizeState, avgBlockSize int) (state, blocksize int) {
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// TODO: Make default blocksize transition matrix actually make the average
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// blocksize equal to avgBlockSize.
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state = params.BlockSizeTransitionMatrix.NextState(r, lastBlockSizeState)
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switch state {
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case 0:
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blocksize = r.Intn(avgBlockSize * 4)
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case 1:
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blocksize = r.Intn(avgBlockSize * 2)
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default:
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blocksize = 0
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}
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return state, blocksize
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}
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2018-11-09 07:31:56 -08:00
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// PeriodicInvariant returns an Invariant function closure that asserts a given
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// invariant if the mock application's last block modulo the given period is
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// congruent to the given offset.
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//
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// NOTE this function is intended to be used manually used while running
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// computationally heavy simulations.
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// TODO reference this function in the codebase probably through use of a switch
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func PeriodicInvariant(invariant Invariant, period int, offset int) Invariant {
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return func(app *baseapp.BaseApp) error {
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if int(app.LastBlockHeight())%period == offset {
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return invariant(app)
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}
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return nil
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}
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}
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