In a medium skillet, heat the olive oil. Add the chorizo and cook over high heat until lightly browned, about 2 minutes. Add the shrimp, scallions, garlic, chickpeas and tomato paste, season with salt and pepper and cook, stirring, for 1 minute. Add the wine and cook over low heat, stirring occasionally, until the shrimp are cooked through and the liquid is slightly reduced, about 2 minutes. Serve in bowls with crusty bread.