feat: add solution for ex08

exercises/ex08-genesis-config/nft-with-genesis-config/src/lib.rs

@@ -49,10 +49,24 @@ pub mod pallet {
 	#[pallet::genesis_build]
 	impl<T: Config> GenesisBuild<T> for GenesisConfig<T> {
 		fn build(&self) {
-			// TODO
-			// iterate over the `GenesisAssetList` and:
-			// 1) mint each asset
-			// 2) transfer the correct amount of this asset to each account in the inner vec
+			for (creator, metadata, supply, owners) in self.genesis_asset_list.iter() {
+				let bounded_metadata: BoundedVec<u8, T::MaxLength> =
+					metadata.clone().try_into().unwrap();
+
+				Pallet::<T>::inner_mint(creator.clone(), bounded_metadata, supply.clone()).unwrap();
+
+				let created_asset_id = Pallet::<T>::nonce() - 1;
+
+				for (recipient, amount) in (*owners).iter() {
+					Pallet::<T>::inner_transfer(
+						created_asset_id,
+						creator.clone(),
+						recipient.clone(),
+						amount.clone(),
+					)
+					.unwrap();
+				}
+			}
 		}
 	}