IBufferAsBase64Serializer

A kotlinx.serialization KSerializer that represents a ByteArray as a Base64 string instead of the default array-of-bytes form.

Apply it to a binary property with @Serializable(with = IBufferAsBase64Serializer::class) to keep that field compact and human-readable in text formats such as JSON. Encoding uses the standard Base64 alphabet (RFC 4648), consistent with encodeBase64 and decodeBase64.