diff --git a/.gitignore b/.gitignore
index 93b96d216..927e72a8b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /target
 **/*.rs.bk
 Cargo.lock
-*.db
\ No newline at end of file
+*.db
+deltachat.h
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index 540c878b6..9bbe5b833 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,8 @@ edition = "2018"
 [build-dependencies]
 cc = "1.0.35"
 pkg-config = "0.3"
-bindgen = "0.49.0"
+cbindgen = "0.8.3"
+
 
 [dependencies]
 c2rust-bitfields = "0.1.0"
diff --git a/build.rs b/build.rs
index a7e6abdda..803d68b4f 100644
--- a/build.rs
+++ b/build.rs
@@ -1,6 +1,7 @@
-extern crate bindgen;
 extern crate cc;
 
+use std::env;
+
 fn main() {
     let mut config = cc::Build::new();
     config.file("misc.h");
@@ -28,4 +29,12 @@ fn main() {
     } else if std::env::var("TARGET").unwrap().contains("linux") {
         println!("cargo:rustc-link-lib=dylib=etpan");
     }
+
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+
+    cbindgen::Builder::new()
+        .with_crate(crate_dir)
+        .generate()
+        .expect("Unable to generate bindings")
+        .write_to_file("deltachat.h");
 }
diff --git a/src/constants.rs b/src/constants.rs
new file mode 100644
index 000000000..6fcb73053
--- /dev/null
+++ b/src/constants.rs
@@ -0,0 +1,611 @@
+//! Constants
+
+pub const DC_GCL_ARCHIVED_ONLY: usize = 0x01;
+pub const DC_GCL_NO_SPECIALS: usize = 0x02;
+pub const DC_GCL_ADD_ALLDONE_HINT: usize = 0x04;
+
+pub const DC_GCM_ADDDAYMARKER: usize = 0x01;
+
+pub const DC_GCL_VERIFIED_ONLY: usize = 0x01;
+pub const DC_GCL_ADD_SELF: usize = 0x02;
+
+// param1 is a directory where the keys are written to
+pub const DC_IMEX_EXPORT_SELF_KEYS: usize = 1;
+// param1 is a directory where the keys are searched in and read from
+pub const DC_IMEX_IMPORT_SELF_KEYS: usize = 2;
+// param1 is a directory where the backup is written to
+pub const DC_IMEX_EXPORT_BACKUP: usize = 11;
+// param1 is the file with the backup to import
+pub const DC_IMEX_IMPORT_BACKUP: usize = 12;
+
+// id=contact
+pub const DC_QR_ASK_VERIFYCONTACT: usize = 200;
+// text1=groupname
+pub const DC_QR_ASK_VERIFYGROUP: usize = 202;
+// id=contact
+pub const DC_QR_FPR_OK: usize = 210;
+// id=contact
+pub const DC_QR_FPR_MISMATCH: usize = 220;
+// test1=formatted fingerprint
+pub const DC_QR_FPR_WITHOUT_ADDR: usize = 230;
+// id=contact
+pub const DC_QR_ADDR: usize = 320;
+// text1=text
+pub const DC_QR_TEXT: usize = 330;
+// text1=URL
+pub const DC_QR_URL: usize = 332;
+// text1=error string
+pub const DC_QR_ERROR: usize = 400;
+
+// virtual chat showing all messages belonging to chats flagged with chats.blocked=2
+pub const DC_CHAT_ID_DEADDROP: usize = 1;
+// messages that should be deleted get this chat_id; the messages are deleted from the working thread later then. This is also needed as rfc724_mid should be preset as long as the message is not deleted on the server (otherwise it is downloaded again)
+pub const DC_CHAT_ID_TRASH: usize = 3;
+// a message is just in creation but not yet assigned to a chat (eg. we may need the message ID to set up blobs; this avoids unready message to be sent and shown)
+pub const DC_CHAT_ID_MSGS_IN_CREATION: usize = 4;
+// virtual chat showing all messages flagged with msgs.starred=2
+pub const DC_CHAT_ID_STARRED: usize = 5;
+// only an indicator in a chatlist
+pub const DC_CHAT_ID_ARCHIVED_LINK: usize = 6;
+// only an indicator in a chatlist
+pub const DC_CHAT_ID_ALLDONE_HINT: usize = 7;
+// larger chat IDs are "real" chats, their messages are "real" messages.
+pub const DC_CHAT_ID_LAST_SPECIAL: usize = 9;
+
+pub const DC_CHAT_TYPE_UNDEFINED: usize = 0;
+pub const DC_CHAT_TYPE_SINGLE: usize = 100;
+pub const DC_CHAT_TYPE_GROUP: usize = 120;
+pub const DC_CHAT_TYPE_VERIFIED_GROUP: usize = 130;
+
+pub const DC_MSG_ID_MARKER1: usize = 1;
+pub const DC_MSG_ID_DAYMARKER: usize = 9;
+pub const DC_MSG_ID_LAST_SPECIAL: usize = 9;
+
+pub const DC_STATE_UNDEFINED: usize = 0;
+pub const DC_STATE_IN_FRESH: usize = 10;
+pub const DC_STATE_IN_NOTICED: usize = 13;
+pub const DC_STATE_IN_SEEN: usize = 16;
+pub const DC_STATE_OUT_PREPARING: usize = 18;
+pub const DC_STATE_OUT_DRAFT: usize = 19;
+pub const DC_STATE_OUT_PENDING: usize = 20;
+pub const DC_STATE_OUT_FAILED: usize = 24;
+// to check if a mail was sent, use dc_msg_is_sent()
+pub const DC_STATE_OUT_DELIVERED: usize = 26;
+pub const DC_STATE_OUT_MDN_RCVD: usize = 28;
+
+// approx. max. lenght returned by dc_msg_get_text()
+pub const DC_MAX_GET_TEXT_LEN: usize = 30000;
+// approx. max. lenght returned by dc_get_msg_info()
+pub const DC_MAX_GET_INFO_LEN: usize = 100000;
+
+pub const DC_CONTACT_ID_SELF: usize = 1;
+pub const DC_CONTACT_ID_DEVICE: usize = 2;
+pub const DC_CONTACT_ID_LAST_SPECIAL: usize = 9;
+
+pub const DC_TEXT1_DRAFT: usize = 1;
+pub const DC_TEXT1_USERNAME: usize = 2;
+pub const DC_TEXT1_SELF: usize = 3;
+
+/**
+ * Text message.
+ * The text of the message is set using dc_msg_set_text()
+ * and retrieved with dc_msg_get_text().
+ */
+pub const DC_MSG_TEXT: usize = 10;
+
+/**
+ * Image message.
+ * If the image is an animated GIF, the type DC_MSG_GIF should be used.
+ * File, width and height are set via dc_msg_set_file(), dc_msg_set_dimension
+ * and retrieved via dc_msg_set_file(), dc_msg_set_dimension().
+ */
+pub const DC_MSG_IMAGE: usize = 20;
+
+/**
+ * Animated GIF message.
+ * File, width and height are set via dc_msg_set_file(), dc_msg_set_dimension()
+ * and retrieved via dc_msg_get_file(), dc_msg_get_width(), dc_msg_get_height().
+ */
+pub const DC_MSG_GIF: usize = 21;
+
+/**
+ * Message containing an Audio file.
+ * File and duration are set via dc_msg_set_file(), dc_msg_set_duration()
+ * and retrieved via dc_msg_get_file(), dc_msg_get_duration().
+ */
+pub const DC_MSG_AUDIO: usize = 40;
+
+/**
+ * A voice message that was directly recorded by the user.
+ * For all other audio messages, the type #DC_MSG_AUDIO should be used.
+ * File and duration are set via dc_msg_set_file(), dc_msg_set_duration()
+ * and retieved via dc_msg_get_file(), dc_msg_get_duration()
+ */
+pub const DC_MSG_VOICE: usize = 41;
+
+/**
+ * Video messages.
+ * File, width, height and durarion
+ * are set via dc_msg_set_file(), dc_msg_set_dimension(), dc_msg_set_duration()
+ * and retrieved via
+ * dc_msg_get_file(), dc_msg_get_width(),
+ * dc_msg_get_height(), dc_msg_get_duration().
+ */
+pub const DC_MSG_VIDEO: usize = 50;
+
+/**
+ * Message containing any file, eg. a PDF.
+ * The file is set via dc_msg_set_file()
+ * and retrieved via dc_msg_get_file().
+ */
+pub const DC_MSG_FILE: usize = 60;
+
+/**
+ * @defgroup DC_LP DC_LP
+ *
+ * Flags for configuring IMAP and SMTP servers.
+ * These flags are optional
+ * and may be set together with the username, password etc.
+ * via dc_set_config() using the key "server_flags".
+ *
+ * @addtogroup DC_LP
+ * @{
+ */
+
+/**
+ * Force OAuth2 authorization. This flag does not skip automatic configuration.
+ * Before calling dc_configure() with DC_LP_AUTH_OAUTH2 set,
+ * the user has to confirm access at the URL returned by dc_get_oauth2_url().
+ */
+pub const DC_LP_AUTH_OAUTH2: usize = 0x2;
+
+/**
+ * Force NORMAL authorization, this is the default.
+ * If this flag is set, automatic configuration is skipped.
+ */
+pub const DC_LP_AUTH_NORMAL: usize = 0x4;
+
+/**
+ * Connect to IMAP via STARTTLS.
+ * If this flag is set, automatic configuration is skipped.
+ */
+pub const DC_LP_IMAP_SOCKET_STARTTLS: usize = 0x100;
+
+/**
+ * Connect to IMAP via SSL.
+ * If this flag is set, automatic configuration is skipped.
+ */
+pub const DC_LP_IMAP_SOCKET_SSL: usize = 0x200;
+
+/**
+ * Connect to IMAP unencrypted, this should not be used.
+ * If this flag is set, automatic configuration is skipped.
+ */
+pub const DC_LP_IMAP_SOCKET_PLAIN: usize = 0x400;
+
+/**
+ * Connect to SMTP via STARTTLS.
+ * If this flag is set, automatic configuration is skipped.
+ */
+pub const DC_LP_SMTP_SOCKET_STARTTLS: usize = 0x10000;
+
+/**
+ * Connect to SMTP via SSL.
+ * If this flag is set, automatic configuration is skipped.
+ */
+pub const DC_LP_SMTP_SOCKET_SSL: usize = 0x20000;
+
+/**
+ * Connect to SMTP unencrypted, this should not be used.
+ * If this flag is set, automatic configuration is skipped.
+ */
+pub const DC_LP_SMTP_SOCKET_PLAIN: usize = 0x40000;
+
+// if none of these flags are set, the default is choosen
+pub const DC_LP_AUTH_FLAGS: usize = (DC_LP_AUTH_OAUTH2 | DC_LP_AUTH_NORMAL);
+// if none of these flags are set, the default is choosen
+pub const DC_LP_IMAP_SOCKET_FLAGS: usize =
+    (DC_LP_IMAP_SOCKET_STARTTLS | DC_LP_IMAP_SOCKET_SSL | DC_LP_IMAP_SOCKET_PLAIN);
+// if none of these flags are set, the default is choosen
+pub const DC_LP_SMTP_SOCKET_FLAGS: usize =
+    (DC_LP_SMTP_SOCKET_STARTTLS | DC_LP_SMTP_SOCKET_SSL | DC_LP_SMTP_SOCKET_PLAIN);
+
+/**
+ * @defgroup DC_EVENT DC_EVENT
+ *
+ * These constants are used as events
+ * reported to the callback given to dc_context_new().
+ * If you do not want to handle an event, it is always safe to return 0,
+ * so there is no need to add a "case" for every event.
+ *
+ * @addtogroup DC_EVENT
+ * @{
+ */
+
+/**
+ * The library-user may write an informational string to the log.
+ * Passed to the callback given to dc_context_new().
+ *
+ * This event should not be reported to the end-user using a popup or something like that.
+ *
+ * @param data1 0
+ * @param data2 (const char*) Info string in english language.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @return 0
+ */
+pub const DC_EVENT_INFO: usize = 100;
+
+/**
+ * Emitted when SMTP connection is established and login was successful.
+ *
+ * @param data1 0
+ * @param data2 (const char*) Info string in english language.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @return 0
+ */
+pub const DC_EVENT_SMTP_CONNECTED: usize = 101;
+
+/**
+ * Emitted when IMAP connection is established and login was successful.
+ *
+ * @param data1 0
+ * @param data2 (const char*) Info string in english language.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @return 0
+ */
+pub const DC_EVENT_IMAP_CONNECTED: usize = 102;
+
+/**
+ * Emitted when a message was successfully sent to the SMTP server.
+ *
+ * @param data1 0
+ * @param data2 (const char*) Info string in english language.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @return 0
+ */
+pub const DC_EVENT_SMTP_MESSAGE_SENT: usize = 103;
+
+/**
+ * The library-user should write a warning string to the log.
+ * Passed to the callback given to dc_context_new().
+ *
+ * This event should not be reported to the end-user using a popup or something like that.
+ *
+ * @param data1 0
+ * @param data2 (const char*) Warning string in english language.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @return 0
+ */
+pub const DC_EVENT_WARNING: usize = 300;
+
+/**
+ * The library-user should report an error to the end-user.
+ * Passed to the callback given to dc_context_new().
+ *
+ * As most things are asynchrounous, things may go wrong at any time and the user
+ * should not be disturbed by a dialog or so.  Instead, use a bubble or so.
+ *
+ * However, for ongoing processes (eg. dc_configure())
+ * or for functions that are expected to fail (eg. dc_continue_key_transfer())
+ * it might be better to delay showing these events until the function has really
+ * failed (returned false). It should be sufficient to report only the _last_ error
+ * in a messasge box then.
+ *
+ * @param data1 0
+ * @param data2 (const char*) Error string, always set, never NULL. Frequent error strings are
+ *     localized using #DC_EVENT_GET_STRING, however, most error strings will be in english language.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @return 0
+ */
+pub const DC_EVENT_ERROR: usize = 400;
+
+/**
+ * An action cannot be performed because there is no network available.
+ *
+ * The library will typically try over after a some time
+ * and when dc_maybe_network() is called.
+ *
+ * Network errors should be reported to users in a non-disturbing way,
+ * however, as network errors may come in a sequence,
+ * it is not useful to raise each an every error to the user.
+ * For this purpose, data1 is set to 1 if the error is probably worth reporting.
+ *
+ * Moreover, if the UI detects that the device is offline,
+ * it is probably more useful to report this to the user
+ * instread of the string from data2.
+ *
+ * @param data1 (int) 1=first/new network error, should be reported the user;
+ *     0=subsequent network error, should be logged only
+ * @param data2 (const char*) Error string, always set, never NULL.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @return 0
+ */
+pub const DC_EVENT_ERROR_NETWORK: usize = 401;
+
+/**
+ * An action cannot be performed because the user is not in the group.
+ * Reported eg. after a call to
+ * dc_set_chat_name(), dc_set_chat_profile_image(),
+ * dc_add_contact_to_chat(), dc_remove_contact_from_chat(),
+ * dc_send_text_msg() or another sending function.
+ *
+ * @param data1 0
+ * @param data2 (const char*) Info string in english language.
+ *     Must not be free()'d or modified
+ *     and is valid only until the callback returns.
+ * @return 0
+ */
+pub const DC_EVENT_ERROR_SELF_NOT_IN_GROUP: usize = 410;
+
+/**
+ * Messages or chats changed.  One or more messages or chats changed for various
+ * reasons in the database:
+ * - Messages sent, received or removed
+ * - Chats created, deleted or archived
+ * - A draft has been set
+ *
+ * @param data1 (int) chat_id for single added messages
+ * @param data2 (int) msg_id for single added messages
+ * @return 0
+ */
+pub const DC_EVENT_MSGS_CHANGED: usize = 2000;
+
+/**
+ * There is a fresh message. Typically, the user will show an notification
+ * when receiving this message.
+ *
+ * There is no extra #DC_EVENT_MSGS_CHANGED event send together with this event.
+ *
+ * @param data1 (int) chat_id
+ * @param data2 (int) msg_id
+ * @return 0
+ */
+pub const DC_EVENT_INCOMING_MSG: usize = 2005;
+
+/**
+ * A single message is sent successfully. State changed from  DC_STATE_OUT_PENDING to
+ * DC_STATE_OUT_DELIVERED, see dc_msg_get_state().
+ *
+ * @param data1 (int) chat_id
+ * @param data2 (int) msg_id
+ * @return 0
+ */
+pub const DC_EVENT_MSG_DELIVERED: usize = 2010;
+
+/**
+ * A single message could not be sent. State changed from DC_STATE_OUT_PENDING or DC_STATE_OUT_DELIVERED to
+ * DC_STATE_OUT_FAILED, see dc_msg_get_state().
+ *
+ * @param data1 (int) chat_id
+ * @param data2 (int) msg_id
+ * @return 0
+ */
+pub const DC_EVENT_MSG_FAILED: usize = 2012;
+
+/**
+ * A single message is read by the receiver. State changed from DC_STATE_OUT_DELIVERED to
+ * DC_STATE_OUT_MDN_RCVD, see dc_msg_get_state().
+ *
+ * @param data1 (int) chat_id
+ * @param data2 (int) msg_id
+ * @return 0
+ */
+pub const DC_EVENT_MSG_READ: usize = 2015;
+
+/**
+ * Chat changed.  The name or the image of a chat group was changed or members were added or removed.
+ * Or the verify state of a chat has changed.
+ * See dc_set_chat_name(), dc_set_chat_profile_image(), dc_add_contact_to_chat()
+ * and dc_remove_contact_from_chat().
+ *
+ * @param data1 (int) chat_id
+ * @param data2 0
+ * @return 0
+ */
+pub const DC_EVENT_CHAT_MODIFIED: usize = 2020;
+
+/**
+ * Contact(s) created, renamed, blocked or deleted.
+ *
+ * @param data1 (int) If not 0, this is the contact_id of an added contact that should be selected.
+ * @param data2 0
+ * @return 0
+ */
+pub const DC_EVENT_CONTACTS_CHANGED: usize = 2030;
+
+/**
+ * Location of one or more contact has changed.
+ *
+ * @param data1 (int) contact_id of the contact for which the location has changed.
+ *     If the locations of several contacts have been changed,
+ *     eg. after calling dc_delete_all_locations(), this parameter is set to 0.
+ * @param data2 0
+ * @return 0
+ */
+pub const DC_EVENT_LOCATION_CHANGED: usize = 2035;
+
+/**
+ * Inform about the configuration progress started by dc_configure().
+ *
+ * @param data1 (int) 0=error, 1-999=progress in permille, 1000=success and done
+ * @param data2 0
+ * @return 0
+ */
+pub const DC_EVENT_CONFIGURE_PROGRESS: usize = 2041;
+
+/**
+ * Inform about the import/export progress started by dc_imex().
+ *
+ * @param data1 (int) 0=error, 1-999=progress in permille, 1000=success and done
+ * @param data2 0
+ * @return 0
+ */
+pub const DC_EVENT_IMEX_PROGRESS: usize = 2051;
+
+/**
+ * A file has been exported. A file has been written by dc_imex().
+ * This event may be sent multiple times by a single call to dc_imex().
+ *
+ * A typical purpose for a handler of this event may be to make the file public to some system
+ * services.
+ *
+ * @param data1 (const char*) Path and file name.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @param data2 0
+ * @return 0
+ */
+pub const DC_EVENT_IMEX_FILE_WRITTEN: usize = 2052;
+
+/**
+ * Progress information of a secure-join handshake from the view of the inviter
+ * (Alice, the person who shows the QR code).
+ *
+ * These events are typically sent after a joiner has scanned the QR code
+ * generated by dc_get_securejoin_qr().
+ *
+ * @param data1 (int) ID of the contact that wants to join.
+ * @param data2 (int) Progress as:
+ *     300=vg-/vc-request received, typically shown as "bob@addr joins".
+ *     600=vg-/vc-request-with-auth received, vg-member-added/vc-contact-confirm sent, typically shown as "bob@addr verified".
+ *     800=vg-member-added-received received, shown as "bob@addr securely joined GROUP", only sent for the verified-group-protocol.
+ *     1000=Protocol finished for this contact.
+ * @return 0
+ */
+pub const DC_EVENT_SECUREJOIN_INVITER_PROGRESS: usize = 2060;
+
+/**
+ * Progress information of a secure-join handshake from the view of the joiner
+ * (Bob, the person who scans the QR code).
+ *
+ * The events are typically sent while dc_join_securejoin(), which
+ * may take some time, is executed.
+ *
+ * @param data1 (int) ID of the inviting contact.
+ * @param data2 (int) Progress as:
+ *     400=vg-/vc-request-with-auth sent, typically shown as "alice@addr verified, introducing myself."
+ *     (Bob has verified alice and waits until Alice does the same for him)
+ * @return 0
+ */
+pub const DC_EVENT_SECUREJOIN_JOINER_PROGRESS: usize = 2061;
+
+// the following events are functions that should be provided by the frontends
+
+/**
+ * Requeste a localized string from the frontend.
+ *
+ * @param data1 (int) ID of the string to request, one of the DC_STR_* constants.
+ * @param data2 (int) The count. If the requested string contains a placeholder for a numeric value,
+ *     the ui may use this value to return different strings on different plural forms.
+ * @return (const char*) Null-terminated UTF-8 string.
+ *     The string will be free()'d by the core,
+ *     so it must be allocated using malloc() or a compatible function.
+ *     Return 0 if the ui cannot provide the requested string
+ *     the core will use a default string in english language then.
+ */
+pub const DC_EVENT_GET_STRING: usize = 2091;
+
+/**
+ * Request a HTTP-file or HTTPS-file from the frontend using HTTP-GET.
+ *
+ * @param data1 (const char*) Null-terminated UTF-8 string containing the URL.
+ *     The string starts with https:// or http://.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ * @param data2 0
+ * @return (const char*) The content of the requested file as a null-terminated UTF-8 string;
+ *     Response headers, encodings etc. must be stripped.
+ *     Only the raw file should be returned.
+ *     CAVE: The string will be free()'d by the core,
+ *     so make sure it is allocated using malloc() or a compatible function.
+ *     If you cannot provide the content, just return 0 or an empty string.
+ */
+pub const DC_EVENT_HTTP_GET: usize = 2100;
+
+/**
+ * Request a HTTP-file or HTTPS-file from the frontend using HTTP-POST.
+ *
+ * @param data1 (const char*) Null-terminated UTF-8 string containing the URL.
+ *     The string starts with https:// or http://.
+ *     Must not be free()'d or modified and is valid only until the callback returns.
+ *     Parameter to POST are added to the url after `?`.
+ * @param data2 0
+ * @return (const char*) The content of the requested file as a null-terminated UTF-8 string;
+ *     Response headers, encodings etc. must be stripped.
+ *     Only the raw file should be returned.
+ *     CAVE: The string will be free()'d by the core,
+ *     so make sure it is allocated using malloc() or a compatible function.
+ *     If you cannot provide the content, just return 0 or an empty string.
+ */
+pub const DC_EVENT_HTTP_POST: usize = 2110;
+
+/**
+ * @}
+ */
+
+pub const DC_EVENT_FILE_COPIED: usize = 2055; // deprecated;
+pub const DC_EVENT_IS_OFFLINE: usize = 2081; // deprecated;
+pub const DC_ERROR_SEE_STRING: usize = 0; // deprecated;
+pub const DC_ERROR_SELF_NOT_IN_GROUP: usize = 1; // deprecated;
+pub const DC_STR_SELFNOTINGRP: usize = 21; // deprecated;
+
+/*
+ * Values for dc_get|set_config("show_emails")
+ */
+pub const DC_SHOW_EMAILS_OFF: usize = 0;
+pub const DC_SHOW_EMAILS_ACCEPTED_CONTACTS: usize = 1;
+pub const DC_SHOW_EMAILS_ALL: usize = 2;
+
+/*
+ * TODO: Strings need some doumentation about used placeholders.
+ *
+ * @defgroup DC_STR DC_STR
+ *
+ * These constants are used to request strings using #DC_EVENT_GET_STRING.
+ *
+ * @addtogroup DC_STR
+ * @{
+ */
+pub const DC_STR_NOMESSAGES: usize = 1;
+pub const DC_STR_SELF: usize = 2;
+pub const DC_STR_DRAFT: usize = 3;
+pub const DC_STR_MEMBER: usize = 4;
+pub const DC_STR_CONTACT: usize = 6;
+pub const DC_STR_VOICEMESSAGE: usize = 7;
+pub const DC_STR_DEADDROP: usize = 8;
+pub const DC_STR_IMAGE: usize = 9;
+pub const DC_STR_VIDEO: usize = 10;
+pub const DC_STR_AUDIO: usize = 11;
+pub const DC_STR_FILE: usize = 12;
+pub const DC_STR_STATUSLINE: usize = 13;
+pub const DC_STR_NEWGROUPDRAFT: usize = 14;
+pub const DC_STR_MSGGRPNAME: usize = 15;
+pub const DC_STR_MSGGRPIMGCHANGED: usize = 16;
+pub const DC_STR_MSGADDMEMBER: usize = 17;
+pub const DC_STR_MSGDELMEMBER: usize = 18;
+pub const DC_STR_MSGGROUPLEFT: usize = 19;
+pub const DC_STR_GIF: usize = 23;
+pub const DC_STR_ENCRYPTEDMSG: usize = 24;
+pub const DC_STR_E2E_AVAILABLE: usize = 25;
+pub const DC_STR_ENCR_TRANSP: usize = 27;
+pub const DC_STR_ENCR_NONE: usize = 28;
+pub const DC_STR_CANTDECRYPT_MSG_BODY: usize = 29;
+pub const DC_STR_FINGERPRINTS: usize = 30;
+pub const DC_STR_READRCPT: usize = 31;
+pub const DC_STR_READRCPT_MAILBODY: usize = 32;
+pub const DC_STR_MSGGRPIMGDELETED: usize = 33;
+pub const DC_STR_E2E_PREFERRED: usize = 34;
+pub const DC_STR_CONTACT_VERIFIED: usize = 35;
+pub const DC_STR_CONTACT_NOT_VERIFIED: usize = 36;
+pub const DC_STR_CONTACT_SETUP_CHANGED: usize = 37;
+pub const DC_STR_ARCHIVEDCHATS: usize = 40;
+pub const DC_STR_STARREDMSGS: usize = 41;
+pub const DC_STR_AC_SETUP_MSG_SUBJECT: usize = 42;
+pub const DC_STR_AC_SETUP_MSG_BODY: usize = 43;
+pub const DC_STR_SELFTALK_SUBTITLE: usize = 50;
+pub const DC_STR_CANNOT_LOGIN: usize = 60;
+pub const DC_STR_SERVER_RESPONSE: usize = 61;
+pub const DC_STR_MSGACTIONBYUSER: usize = 62;
+pub const DC_STR_MSGACTIONBYME: usize = 63;
+pub const DC_STR_MSGLOCATIONENABLED: usize = 64;
+pub const DC_STR_MSGLOCATIONDISABLED: usize = 65;
+pub const DC_STR_LOCATION: usize = 66;
+pub const DC_STR_COUNT: usize = 66;
diff --git a/src/lib.rs b/src/lib.rs
index b660f21c9..c6d2720b5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -69,6 +69,9 @@ pub mod dc_strencode;
 pub mod dc_token;
 pub mod dc_tools;
 
+pub mod constants;
+pub use self::constants::*;
+
 #[cfg(test)]
 mod tests {
     use std::ffi::{CStr, CString};