lotus/chain/types/fil.go
2019-11-05 10:50:27 -08:00

43 lines
791 B
Go

package types
import (
"fmt"
"math/big"
"strings"
"github.com/filecoin-project/lotus/build"
)
type FIL BigInt
func (f FIL) String() string {
r := new(big.Rat).SetFrac(f.Int, big.NewInt(build.FilecoinPrecision))
if r.Sign() == 0 {
return "0"
}
return strings.TrimRight(strings.TrimRight(r.FloatString(18), "0"), ".")
}
func (f FIL) Format(s fmt.State, ch rune) {
switch ch {
case 's', 'v':
fmt.Fprint(s, f.String())
default:
f.Int.Format(s, ch)
}
}
func ParseFIL(s string) (FIL, error) {
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(build.FilecoinPrecision, 1))
if !r.IsInt() {
return FIL{}, fmt.Errorf("invalid FIL value: %q", s)
}
return FIL{r.Num()}, nil
}