const crypto/ed25519.PublicKeySize

4 uses

	crypto/ed25519 (current package)
		ed25519.go#L34: 	PublicKeySize = 32
		ed25519.go#L63: 	publicKey := make([]byte, PublicKeySize)
		ed25519.go#L237: 	if l := len(publicKey); l != PublicKeySize {

	crypto/x509
		parser.go#L302: 		if len(data) != ed25519.PublicKeySize {