51 lines
1.7 KiB
Go
51 lines
1.7 KiB
Go
// Copyright 2021 Evmos Foundation
|
|
// This file is part of Evmos' Ethermint library.
|
|
//
|
|
// The Ethermint library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The Ethermint library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the Ethermint library. If not, see https://github.com/evmos/ethermint/blob/main/LICENSE
|
|
package types
|
|
|
|
import (
|
|
fmt "fmt"
|
|
math "math"
|
|
"math/big"
|
|
|
|
errorsmod "cosmossdk.io/errors"
|
|
sdkmath "cosmossdk.io/math"
|
|
errortypes "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, errorsmod.Wrapf(errortypes.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
|
|
}
|