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#ifndef SESSION_BUILDER_H
#define SESSION_BUILDER_H
#include <stdint.h>
#include "signal_protocol_types.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Session builder is responsible for setting up encrypted sessions.
* Once a session has been established, session_cipher
* can be used to encrypt/decrypt messages in that session.
*
* Sessions are built from one these different possible vectors:
* - A session_pre_key_bundle retrieved from a server
* - A pre_key_signal_message received from a client
*
* Sessions are constructed per Signal Protocol address
* (recipient name + device ID tuple). Remote logical users are identified by
* their recipient name, and each logical recipient can have multiple
* physical devices.
*/
/**
* Constructs a session builder.
*
* The store and global contexts must remain valid for the lifetime of the
* session builder.
*
* When finished, free the returned instance by calling session_builder_free().
*
* @param builder set to a freshly allocated session builder instance
* @param store the signal_protocol_store_context to store all state information in
* @param remote_address the address of the remote user to build a session with
* @param global_context the global library context
* @return 0 on success, or negative on failure
*/
int session_builder_create(session_builder **builder,
signal_protocol_store_context *store, const signal_protocol_address *remote_address,
signal_context *global_context);
/**
* Build a new session from a session_pre_key_bundle retrieved from a server.
*
* @param bundle A pre key bundle for the destination recipient, retrieved from a server.
* @retval SG_SUCCESS Success
* @retval SG_ERR_INVALID_KEY when the session_pre_key_bundle is badly formatted.
* @retval SG_ERR_UNTRUSTED_IDENTITY when the sender's identity key is not trusted.
*/
int session_builder_process_pre_key_bundle(session_builder *builder, session_pre_key_bundle *bundle);
void session_builder_free(session_builder *builder);
#ifdef __cplusplus
}
#endif
#endif /* SESSION_BUILDER_H */
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