Smoked Salmon Rillettes

Name: Smoked Salmon Rillettes
Ingredients: 1 pound center-cut wild-caught salmon (skin and pinbones removed, trimmed and dark flesh removed); 2 tablespoon anise seeds; kosher salt and white pepper (as needed); 8 tablespoon unsalted butter (divided); ½ cup minced shallots; 1 tablespoon creme fraiche; 8 ounce un-sliced, chilled smoked salmon; 2 ½ tablespoon freshly squeezed lemon juice; 1 tablespoon very good extra-virgin olive oil; 2 large egg yolks; 1 tablespoon fresh chives, finely chopped (optional )