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slot.go
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slot.go
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package types
import (
fmt "fmt"
fssz "github.com/ferranbt/fastssz"
"github.com/prysmaticlabs/prysm/math"
)
var _ fssz.HashRoot = (Slot)(0)
var _ fssz.Marshaler = (*Slot)(nil)
var _ fssz.Unmarshaler = (*Slot)(nil)
// Slot represents a single slot.
type Slot uint64
// Mul multiplies slot by x.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) Mul(x uint64) Slot {
res, err := s.SafeMul(x)
if err != nil {
panic(err.Error())
}
return res
}
// SafeMul multiplies slot by x.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeMul(x uint64) (Slot, error) {
res, err := math.Mul64(uint64(s), x)
return Slot(res), err
}
// MulSlot multiplies slot by another slot.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) MulSlot(x Slot) Slot {
return s.Mul(uint64(x))
}
// SafeMulSlot multiplies slot by another slot.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeMulSlot(x Slot) (Slot, error) {
return s.SafeMul(uint64(x))
}
// Div divides slot by x.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) Div(x uint64) Slot {
res, err := s.SafeDiv(x)
if err != nil {
panic(err.Error())
}
return res
}
// SafeDiv divides slot by x.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeDiv(x uint64) (Slot, error) {
res, err := math.Div64(uint64(s), x)
return Slot(res), err
}
// DivSlot divides slot by another slot.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) DivSlot(x Slot) Slot {
return s.Div(uint64(x))
}
// SafeDivSlot divides slot by another slot.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeDivSlot(x Slot) (Slot, error) {
return s.SafeDiv(uint64(x))
}
// Add increases slot by x.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) Add(x uint64) Slot {
res, err := s.SafeAdd(x)
if err != nil {
panic(err.Error())
}
return res
}
// SafeAdd increases slot by x.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeAdd(x uint64) (Slot, error) {
res, err := math.Add64(uint64(s), x)
return Slot(res), err
}
// AddSlot increases slot by another slot.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) AddSlot(x Slot) Slot {
return s.Add(uint64(x))
}
// SafeAddSlot increases slot by another slot.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeAddSlot(x Slot) (Slot, error) {
return s.SafeAdd(uint64(x))
}
// Sub subtracts x from the slot.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) Sub(x uint64) Slot {
res, err := s.SafeSub(x)
if err != nil {
panic(err.Error())
}
return res
}
// SafeSub subtracts x from the slot.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeSub(x uint64) (Slot, error) {
res, err := math.Sub64(uint64(s), x)
return Slot(res), err
}
// SubSlot finds difference between two slot values.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) SubSlot(x Slot) Slot {
return s.Sub(uint64(x))
}
// SafeSubSlot finds difference between two slot values.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeSubSlot(x Slot) (Slot, error) {
return s.SafeSub(uint64(x))
}
// Mod returns result of `slot % x`.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) Mod(x uint64) Slot {
res, err := s.SafeMod(x)
if err != nil {
panic(err.Error())
}
return res
}
// SafeMod returns result of `slot % x`.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeMod(x uint64) (Slot, error) {
res, err := math.Mod64(uint64(s), x)
return Slot(res), err
}
// ModSlot returns result of `slot % slot`.
// In case of arithmetic issues (overflow/underflow/div by zero) panic is thrown.
func (s Slot) ModSlot(x Slot) Slot {
return s.Mod(uint64(x))
}
// SafeModSlot returns result of `slot % slot`.
// In case of arithmetic issues (overflow/underflow/div by zero) error is returned.
func (s Slot) SafeModSlot(x Slot) (Slot, error) {
return s.SafeMod(uint64(x))
}
// HashTreeRoot --
func (s Slot) HashTreeRoot() ([32]byte, error) {
return fssz.HashWithDefaultHasher(s)
}
// HashTreeRootWith --
func (s Slot) HashTreeRootWith(hh *fssz.Hasher) error {
hh.PutUint64(uint64(s))
return nil
}
// UnmarshalSSZ --
func (s *Slot) UnmarshalSSZ(buf []byte) error {
if len(buf) != s.SizeSSZ() {
return fmt.Errorf("expected buffer of length %d received %d", s.SizeSSZ(), len(buf))
}
*s = Slot(fssz.UnmarshallUint64(buf))
return nil
}
// MarshalSSZTo --
func (s *Slot) MarshalSSZTo(dst []byte) ([]byte, error) {
marshalled, err := s.MarshalSSZ()
if err != nil {
return nil, err
}
return append(dst, marshalled...), nil
}
// MarshalSSZ --
func (s *Slot) MarshalSSZ() ([]byte, error) {
marshalled := fssz.MarshalUint64([]byte{}, uint64(*s))
return marshalled, nil
}
// SizeSSZ --
func (s *Slot) SizeSSZ() int {
return 8
}