1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
package ethutil
import (
"fmt"
"math/big"
"runtime"
)
func IsWindows() bool {
return runtime.GOOS == "windows"
}
func WindonizePath(path string) string {
if string(path[0]) == "/" && IsWindows() {
path = path[1:]
}
return path
}
// The different number of units
var (
Douglas = BigPow(10, 42)
Einstein = BigPow(10, 21)
Ether = BigPow(10, 18)
Finney = BigPow(10, 15)
Szabo = BigPow(10, 12)
Shannon = BigPow(10, 9)
Babbage = BigPow(10, 6)
Ada = BigPow(10, 3)
Wei = big.NewInt(1)
)
//
// Currency to string
// Returns a string representing a human readable format
func CurrencyToString(num *big.Int) string {
var (
fin *big.Int = num
denom string = "Wei"
)
switch {
case num.Cmp(Douglas) >= 0:
fin = new(big.Int).Div(num, Douglas)
denom = "Douglas"
case num.Cmp(Einstein) >= 0:
fin = new(big.Int).Div(num, Einstein)
denom = "Einstein"
case num.Cmp(Ether) >= 0:
fin = new(big.Int).Div(num, Ether)
denom = "Ether"
case num.Cmp(Finney) >= 0:
fin = new(big.Int).Div(num, Finney)
denom = "Finney"
case num.Cmp(Szabo) >= 0:
fin = new(big.Int).Div(num, Szabo)
denom = "Szabo"
case num.Cmp(Shannon) >= 0:
fin = new(big.Int).Div(num, Shannon)
denom = "Shannon"
case num.Cmp(Babbage) >= 0:
fin = new(big.Int).Div(num, Babbage)
denom = "Babbage"
case num.Cmp(Ada) >= 0:
fin = new(big.Int).Div(num, Ada)
denom = "Ada"
}
// TODO add comment clarifying expected behavior
if len(fin.String()) > 5 {
return fmt.Sprintf("%sE%d %s", fin.String()[0:5], len(fin.String())-5, denom)
}
return fmt.Sprintf("%v %s", fin, denom)
}
// Common big integers often used
var (
Big1 = big.NewInt(1)
Big2 = big.NewInt(2)
Big3 = big.NewInt(3)
Big0 = big.NewInt(0)
BigTrue = Big1
BigFalse = Big0
Big32 = big.NewInt(32)
Big256 = big.NewInt(0xff)
Big257 = big.NewInt(257)
)
|
