toIvk method
Implementation
SaplingIncomingViewingKey toIvk(Bip44Changes scope) {
final ivk = switch (scope) {
Bip44Changes.chainExt => fvk.vk.ivk(),
Bip44Changes.chainInt => deriveInternal().fvk.vk.ivk(),
};
return SaplingIncomingViewingKey(dk: dk, ivk: ivk);
}