113 lines
2.8 KiB
Go
113 lines
2.8 KiB
Go
package common
|
|
|
|
import (
|
|
"fmt"
|
|
"math/big"
|
|
"math/rand"
|
|
"reflect"
|
|
)
|
|
|
|
const (
|
|
hashLength = 32
|
|
addressLength = 20
|
|
)
|
|
|
|
type (
|
|
Hash [hashLength]byte
|
|
Address [addressLength]byte
|
|
)
|
|
|
|
func BytesToHash(b []byte) Hash {
|
|
var h Hash
|
|
h.SetBytes(b)
|
|
return h
|
|
}
|
|
func StringToHash(s string) Hash { return BytesToHash([]byte(s)) }
|
|
func BigToHash(b *big.Int) Hash { return BytesToHash(b.Bytes()) }
|
|
func HexToHash(s string) Hash { return BytesToHash(FromHex(s)) }
|
|
|
|
// Don't use the default 'String' method in case we want to overwrite
|
|
|
|
// Get the string representation of the underlying hash
|
|
func (h Hash) Str() string { return string(h[:]) }
|
|
func (h Hash) Bytes() []byte { return h[:] }
|
|
func (h Hash) Big() *big.Int { return Bytes2Big(h[:]) }
|
|
func (h Hash) Hex() string { return "0x" + Bytes2Hex(h[:]) }
|
|
|
|
// Sets the hash to the value of b. If b is larger than len(h) it will panic
|
|
func (h *Hash) SetBytes(b []byte) {
|
|
if len(b) > len(h) {
|
|
b = b[len(b)-hashLength:]
|
|
}
|
|
|
|
copy(h[hashLength-len(b):], b)
|
|
}
|
|
|
|
// Set string `s` to h. If s is larger than len(h) it will panic
|
|
func (h *Hash) SetString(s string) { h.SetBytes([]byte(s)) }
|
|
|
|
// Sets h to other
|
|
func (h *Hash) Set(other Hash) {
|
|
for i, v := range other {
|
|
h[i] = v
|
|
}
|
|
}
|
|
|
|
// Generate implements testing/quick.Generator.
|
|
func (h Hash) Generate(rand *rand.Rand, size int) reflect.Value {
|
|
m := rand.Intn(len(h))
|
|
for i := len(h) - 1; i > m; i-- {
|
|
h[i] = byte(rand.Uint32())
|
|
}
|
|
return reflect.ValueOf(h)
|
|
}
|
|
|
|
func EmptyHash(h Hash) bool {
|
|
return h == Hash{}
|
|
}
|
|
|
|
/////////// Address
|
|
func BytesToAddress(b []byte) Address {
|
|
var a Address
|
|
a.SetBytes(b)
|
|
return a
|
|
}
|
|
func StringToAddress(s string) Address { return BytesToAddress([]byte(s)) }
|
|
func BigToAddress(b *big.Int) Address { return BytesToAddress(b.Bytes()) }
|
|
func HexToAddress(s string) Address { return BytesToAddress(FromHex(s)) }
|
|
|
|
// Get the string representation of the underlying address
|
|
func (a Address) Str() string { return string(a[:]) }
|
|
func (a Address) Bytes() []byte { return a[:] }
|
|
func (a Address) Big() *big.Int { return Bytes2Big(a[:]) }
|
|
func (a Address) Hash() Hash { return BytesToHash(a[:]) }
|
|
func (a Address) Hex() string { return "0x" + Bytes2Hex(a[:]) }
|
|
|
|
// Sets the address to the value of b. If b is larger than len(a) it will panic
|
|
func (a *Address) SetBytes(b []byte) {
|
|
if len(b) > len(a) {
|
|
b = b[len(b)-addressLength:]
|
|
}
|
|
copy(a[addressLength-len(b):], b)
|
|
}
|
|
|
|
// Set string `s` to a. If s is larger than len(a) it will panic
|
|
func (a *Address) SetString(s string) { a.SetBytes([]byte(s)) }
|
|
|
|
// Sets a to other
|
|
func (a *Address) Set(other Address) {
|
|
for i, v := range other {
|
|
a[i] = v
|
|
}
|
|
}
|
|
|
|
// PP Pretty Prints a byte slice in the following format:
|
|
// hex(value[:4])...(hex[len(value)-4:])
|
|
func PP(value []byte) string {
|
|
if len(value) <= 8 {
|
|
return Bytes2Hex(value)
|
|
}
|
|
|
|
return fmt.Sprintf("%x...%x", value[:4], value[len(value)-4])
|
|
}
|