From dc31b5bde1a7ec55eb05197089da256f388ce43e Mon Sep 17 00:00:00 2001
From: capossele <angelocapossele@gmail.com>
Date: Thu, 26 Mar 2020 19:17:07 +0000
Subject: [PATCH] :sparkles: adds Float64()
---
packages/binary/drng/state/state.go | 16 +++++++++++-----
packages/binary/drng/state/state_test.go | 9 +++++++++
2 files changed, 20 insertions(+), 5 deletions(-)
diff --git a/packages/binary/drng/state/state.go b/packages/binary/drng/state/state.go
index b0a89b50..f29f2253 100644
--- a/packages/binary/drng/state/state.go
+++ b/packages/binary/drng/state/state.go
@@ -1,6 +1,7 @@
package state
import (
+ "encoding/binary"
"sync"
"time"
@@ -13,6 +14,11 @@ type Randomness struct {
Timestamp time.Time
}
+// Float64 returns a float64 [0.0,1.0) rapresentation of the randomness byte slice
+func (r Randomness) Float64() float64 {
+ return float64(binary.BigEndian.Uint64(r.Randomness[:8])>>11) / (1 << 53)
+}
+
type Committee struct {
InstanceID uint32
Threshold uint8
@@ -21,7 +27,7 @@ type Committee struct {
}
type State struct {
randomness *Randomness
- committe *Committee
+ committee *Committee
mutex sync.RWMutex
}
@@ -34,7 +40,7 @@ func New(setters ...Option) *State {
}
return &State{
randomness: args.Randomness,
- committe: args.Committee,
+ committee: args.Committee,
}
}
@@ -56,14 +62,14 @@ func (s *State) Randomness() Randomness {
func (s *State) SetCommittee(c *Committee) {
s.mutex.Lock()
defer s.mutex.Unlock()
- s.committe = c
+ s.committee = c
}
func (s *State) Committee() Committee {
s.mutex.RLock()
defer s.mutex.RUnlock()
- if s.committe == nil {
+ if s.committee == nil {
return Committee{}
}
- return *s.committe
+ return *s.committee
}
diff --git a/packages/binary/drng/state/state_test.go b/packages/binary/drng/state/state_test.go
index 314241ed..ac8c881b 100644
--- a/packages/binary/drng/state/state_test.go
+++ b/packages/binary/drng/state/state_test.go
@@ -40,3 +40,12 @@ func TestState(t *testing.T) {
stateTest.SetRandomness(newRandomness)
require.Equal(t, *newRandomness, stateTest.Randomness())
}
+
+func TestFloat64(t *testing.T) {
+
+ max := []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
+ r := &Randomness{1, max, time.Now()}
+ stateTest := New(SetRandomness(r))
+ require.Equal(t, 0.9999999999999999, stateTest.Randomness().Float64())
+
+}
--
GitLab