package gacha import ( crand "crypto/rand" "encoding/binary" mrand "math/rand" ) var rand = mrand.New(cryptoSource{}) type cryptoSource struct{} func (cryptoSource) Int63() int64 { var value uint64 err := binary.Read(crand.Reader, binary.BigEndian, &value) if err != nil { panic(err) } return int64(value & ^uint64(1<<63)) } func (cryptoSource) Seed(seed int64) {}