package types import ( fmt "fmt" math "math" "math/big" sdkmath "cosmossdk.io/math" 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) (sdkmath.Int, error) { if !IsValidInt256(i) { return sdkmath.NewInt(0), fmt.Errorf("big int out of bound: %s", i) } return sdkmath.NewIntFromBigInt(i), nil } // IsValidInt256 check the bound of 256 bit number func IsValidInt256(i *big.Int) bool { return i == nil || i.BitLen() <= maxBitLen }