message: Add new Agent2Agent API for signus.rs.
diff: @@ -193,6 +193,69 @@ pub extern fn indy_store_their_did(command_handle: i32,
  result_to_err_code!(result)
  }
  +#[no_mangle]
  +pub extern fn indy_create_key(command_handle: i32, seed: *const c_char,
  + cb: Option<extern fn(command_handle_: i32,
  + err: ErrorCode,
  + vk: *const c_char)>) -> ErrorCode {
  + unimplemented!();
  +}
  +
  +#[no_mangle]
  +pub extern fn indy_store_key_metadata(command_handle: i32,
  + vk: *const c_char,
  + metadata: *const c_char,
  + cb: Option<extern fn(command_handle_: i32,
  + err: ErrorCode)>) -> ErrorCode {
  + unimplemented!();
  +}
  +
  +#[no_mangle]
  +pub extern fn indy_get_key_metadata(command_handle: i32,
  + vk: *const c_char,
  + cb: Option<extern fn(command_handle_: i32,
  + err: ErrorCode,
  + metadata: *const c_char)>) -> ErrorCode {
  + unimplemented!();
  +}
  +
  +#[no_mangle]
  +pub extern fn indy_key_for_did(command_handle: i32,
  + did: *const c_char,
  + cb: Option<extern fn(command_handle_: i32,
  + err: ErrorCode,
  + key: *const c_char)>) -> ErrorCode {
  + unimplemented!();
  +}
  +
  +#[no_mangle]
  +pub extern fn indy_endpoint_for_did(command_handle: i32,
  + did: *const c_char,
  + cb: Option<extern fn(command_handle_: i32,
  + err: ErrorCode,
  + endpoint: *const c_char,
  + transport_vk: *const c_char)>) -> ErrorCode {
  + unimplemented!();
  +}
  +
  +#[no_mangle]
  +pub extern fn indy_store_did_metadata(command_handle: i32,
  + did: *const c_char,
  + metadata: *const c_char,
  + cb: Option<extern fn(command_handle_: i32,
  + err: ErrorCode)>) -> ErrorCode {
  + unimplemented!();
  +}
  +
  +#[no_mangle]
  +pub extern fn indy_get_did_metadata(command_handle: i32,
  + did: *const c_char,
  + cb: Option<extern fn(command_handle_: i32,
  + err: ErrorCode,
  + metadata: *const c_char)>) -> ErrorCode {
  + unimplemented!();
  +}
  +
  /// Signs a message by a signing key associated with my DID. The DID with a signing key
  /// must be already created and stored in a secured wallet (see create_and_store_my_identity)
  ///
  