37 lines
900 B
Go
37 lines
900 B
Go
package util
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import (
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"crypto/rand"
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"encoding/json"
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"fmt"
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"math/big"
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"runtime/debug"
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)
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func PrintStackAndPanic(err error) {
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fmt.Printf("Error %s Stack trace:\n%s", err, debug.Stack())
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panic("PANIC")
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}
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// SecureRandomInt returns a cryptographically secure random integer in the range [0,max).
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// Panics if max <= 0 or if there's an error reading from the system's secure
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// random number generator.
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func SecureRandomInt(max int) int {
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// Convert max to *big.Int for crypto/rand operations
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maxBig := big.NewInt(int64(max))
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// Generate random number
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n, err := rand.Int(rand.Reader, maxBig)
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if err != nil {
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PrintStackAndPanic(fmt.Errorf("could not generate a random integer between 0 and %d", max))
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}
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// Convert back to int
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return int(n.Int64())
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}
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func PrettyJson(data string) string {
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marshalled, _ := json.MarshalIndent(data, "", " ")
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return fmt.Sprintf("%s\n", marshalled)
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}
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