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params.go
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params.go
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package simulation
import (
"math/rand"
)
const (
// Minimum time per block
minTimePerBlock int64 = 10000 / 2
// Maximum time per block
maxTimePerBlock int64 = 10000
// TODO Remove in favor of binary search for invariant violation
onOperation bool = false
)
// TODO explain transitional matrix usage
var (
// Currently there are 3 different liveness types,
// fully online, spotty connection, offline.
defaultLivenessTransitionMatrix, _ = CreateTransitionMatrix([][]int{
{90, 20, 1},
{10, 50, 5},
{0, 10, 1000},
})
// 3 states: rand in range [0, 4*provided blocksize],
// rand in range [0, 2 * provided blocksize], 0
defaultBlockSizeTransitionMatrix, _ = CreateTransitionMatrix([][]int{
{85, 5, 0},
{15, 92, 1},
{0, 3, 99},
})
)
// Simulation parameters
type Params struct {
PastEvidenceFraction float64
NumKeys int
EvidenceFraction float64
InitialLivenessWeightings []int
LivenessTransitionMatrix TransitionMatrix
BlockSizeTransitionMatrix TransitionMatrix
}
// Return default simulation parameters
func DefaultParams() Params {
return Params{
PastEvidenceFraction: 0.5,
NumKeys: 250,
EvidenceFraction: 0.5,
InitialLivenessWeightings: []int{40, 5, 5},
LivenessTransitionMatrix: defaultLivenessTransitionMatrix,
BlockSizeTransitionMatrix: defaultBlockSizeTransitionMatrix,
}
}
// Return random simulation parameters
func RandomParams(r *rand.Rand) Params {
return Params{
PastEvidenceFraction: r.Float64(),
NumKeys: r.Intn(250),
EvidenceFraction: r.Float64(),
InitialLivenessWeightings: []int{r.Intn(80), r.Intn(10), r.Intn(10)},
LivenessTransitionMatrix: defaultLivenessTransitionMatrix,
BlockSizeTransitionMatrix: defaultBlockSizeTransitionMatrix,
}
}