public void comprar(Long compradorId, Long publicacionId) {
var tx = beginTransaction();
try {
var publicacion = publicacionService.findById(publicacionId);
var comprador = personajeService.findById(compradorId);
var vendedor = personajeService.findById(publicacion.getVendedor().getId());
vendedor.vender(publicacion, comprador);
publicacionService.save(publicacion);
personajeService.save(comprador);
tx.commit();
} catch (Exception e) {
rollback();
throw e;
}
}
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