forked from evmos/ethermint
/
int.go
34 lines (27 loc) · 905 Bytes
/
int.go
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package types
import (
fmt "fmt"
math "math"
"math/big"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
)
const maxBitLen = 256
// SafeInt64 checks for overflows while casting a uint64 to int64 value.
func SafeInt64(value uint64) (int64, error) {
if value > uint64(math.MaxInt64) {
return 0, sdkerrors.Wrapf(sdkerrors.ErrInvalidHeight, "uint64 value %v cannot exceed %v", value, int64(math.MaxInt64))
}
return int64(value), nil
}
// SafeNewIntFromBigInt constructs Int from big.Int, return error if more than 256bits
func SafeNewIntFromBigInt(i *big.Int) (sdk.Int, error) {
if !IsValidInt256(i) {
return sdk.NewInt(0), fmt.Errorf("big int out of bound: %s", i)
}
return sdk.NewIntFromBigInt(i), nil
}
// IsValidInt256 check the bound of 256 bit number
func IsValidInt256(i *big.Int) bool {
return i == nil || i.BitLen() <= maxBitLen
}