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