const crypto/ed25519.SignatureSize

3 uses

	crypto/ed25519 (current package)
		ed25519.go#L35: 	SignatureSize = 64
		ed25519.go#L152: 	signature := make([]byte, SignatureSize)
		ed25519.go#L208: 	if len(sig) != SignatureSize || sig[63]&224 != 0 {