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Merge pull request #2330 from filecoin-project/feat/fil-units

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produce and parse FIL suffix on FIL strings
This commit is contained in:
Łukasz Magiera 2020-07-10 09:41:01 +02:00 committed by GitHub
commit e81f182840
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2 changed files with 26 additions and 5 deletions
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2
chain/types/bigint_test.go
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@ -43,7 +43,7 @@ func TestBigIntSerializationRoundTrip(t *testing.T) {
func TestFilRoundTrip(t *testing.T) {
testValues := []string{
"0", "1", "1.001", "100.10001", "101100", "5000.01", "5000",
"0 FIL", "1 FIL", "1.001 FIL", "100.10001 FIL", "101100 FIL", "5000.01 FIL", "5000 FIL",
}
for _, v := range testValues {

29
chain/types/fil.go
View File

@ -13,9 +13,9 @@ type FIL BigInt
func (f FIL) String() string {
r := new(big.Rat).SetFrac(f.Int, big.NewInt(int64(build.FilecoinPrecision)))
if r.Sign() == 0 {
return "0"
return "0 FIL"
}
return strings.TrimRight(strings.TrimRight(r.FloatString(18), "0"), ".")
return strings.TrimRight(strings.TrimRight(r.FloatString(18), "0"), ".") + " FIL"
}
func (f FIL) Format(s fmt.State, ch rune) {
@ -28,14 +28,35 @@ func (f FIL) Format(s fmt.State, ch rune) {
}
func ParseFIL(s string) (FIL, error) {
suffix := strings.TrimLeft(s, ".1234567890")
s = s[:len(s)-len(suffix)]
var attofil bool
if suffix != "" {
norm := strings.ToLower(strings.TrimSpace(suffix))
switch norm {
case "", "fil":
case "attofil", "afil":
attofil = true
default:
return FIL{}, fmt.Errorf("unrecognized suffix: %q", suffix)
}
}
r, ok := new(big.Rat).SetString(s)
if !ok {
return FIL{}, fmt.Errorf("failed to parse %q as a decimal number", s)
}
r = r.Mul(r, big.NewRat(int64(build.FilecoinPrecision), 1))
if !attofil {
r = r.Mul(r, big.NewRat(int64(build.FilecoinPrecision), 1))
}
if !r.IsInt() {
return FIL{}, fmt.Errorf("invalid FIL value: %q", s)
var pref string
if attofil {
pref = "atto"
}
return FIL{}, fmt.Errorf("invalid %sFIL value: %q", pref, s)
}
return FIL{r.Num()}, nil