/
util.go
66 lines (57 loc) · 1.12 KB
/
util.go
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package jsonrpc
import (
"encoding/hex"
"fmt"
"math/big"
"strconv"
"strings"
)
type ArgBig big.Int
func (a *ArgBig) UnmarshalText(input []byte) error {
buf, err := parseHexBytes(string(input))
if err != nil {
return err
}
b := new(big.Int)
b.SetBytes(buf)
*a = ArgBig(*b)
return nil
}
func (a *ArgBig) Big() *big.Int {
b := big.Int(*a)
return &b
}
func encodeUintToHex(i uint64) string {
return fmt.Sprintf("0x%x", i)
}
func parseBigInt(str string) *big.Int {
str = strings.TrimPrefix(str, "0x")
num := new(big.Int)
num.SetString(str, 16)
return num
}
func parseUint64orHex(str string) (uint64, error) {
base := 10
if strings.HasPrefix(str, "0x") {
str = str[2:]
base = 16
}
return strconv.ParseUint(str, base, 64)
}
func encodeToHex(b []byte) string {
return "0x" + hex.EncodeToString(b)
}
func parseHexBytes(str string) ([]byte, error) {
if !strings.HasPrefix(str, "0x") {
return nil, fmt.Errorf("it does not have 0x prefix")
}
str = strings.TrimPrefix(str, "0x")
if len(str)%2 != 0 {
str = "0" + str
}
buf, err := hex.DecodeString(str)
if err != nil {
return nil, err
}
return buf, nil
}