$B0 \to Ds^{(*)}Ds^{(*)}$ and outlook of $B0 \to D^{(*)}D$ at LHCb

The measurement of the inclusive branching fraction of $B0s \to Ds^{(*)+} Ds^{(*)-}$ decay together with its contribution to the determination of $\Delta \Gamma{s}/ \Gamma {s}$ are presented. The branching fraction value is compatible with results from previous experiments, improving the world average. The $B0 \to D^+D^-$ and $B0 \to D^*D^{(*)}$ decays are used to measure the parameters associated with $CP$ Violation in those channels; while the analysis associated to the second channel is at an initial stage the first one is almost concluded, the values obtained for the sensitivity on the $CP$ observables show that LHCb can rival the results obtained by previous experiments.