From d6ccebb784598b4d1365868993cc40c3438d2468 Mon Sep 17 00:00:00 2001
From: Greg Zaitsev <greg.zaitsev@gmail.com>
Date: Tue, 04 May 2021 16:42:01 +0000
Subject: [PATCH] Add chain extension to mint


---
--- a/pallets/nft/src/lib.rs
+++ b/pallets/nft/src/lib.rs
@@ -1114,16 +1114,8 @@
         #[weight = <T as Config>::WeightInfo::create_item(data.len())]
         #[transactional]
         pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {
-
             let sender = ensure_signed(origin)?;
-
-            let target_collection = Self::get_collection(collection_id)?;
-
-            Self::can_create_items_in_collection(&target_collection, &sender, &owner, 1)?;
-            Self::validate_create_item_args(&target_collection, &data)?;
-            Self::create_item_no_validation(&target_collection, owner, data)?;
-
-            Ok(())
+            Self::create_item_internal(sender, collection_id, owner, data)
         }
 
         /// This method creates multiple items in a collection created with CreateCollection method.
@@ -1763,6 +1755,15 @@
 }
 
 impl<T: Config> Module<T> {
+    pub fn create_item_internal(sender: T::AccountId, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {
+        let target_collection = Self::get_collection(collection_id)?;
+
+        Self::can_create_items_in_collection(&target_collection, &sender, &owner, 1)?;
+        Self::validate_create_item_args(&target_collection, &data)?;
+        Self::create_item_no_validation(&target_collection, owner, data)?;
+
+        Ok(())
+    }
 
     pub fn transfer_internal(sender: T::AccountId, recipient: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId, value: u128) -> DispatchResult {
         // Limits check
--- a/runtime/src/chain_extension.rs
+++ b/runtime/src/chain_extension.rs
@@ -21,6 +21,14 @@
 use sp_runtime::AccountId32;
 use crate::Vec;
 
+/// Create item parameters
+#[derive(Debug, PartialEq, Encode, Decode)]
+pub struct NFTExtCreateItem<E: Ext> {
+    pub owner: <E::T as SysConfig>::AccountId,
+    pub collection_id: u32,
+    pub data: CreateItemData,
+}
+
 /// Transfer parameters
 #[derive(Debug, PartialEq, Encode, Decode)]
 pub struct NFTExtTransfer<E: Ext> {
@@ -67,8 +75,42 @@
                     _ => Err(DispatchError::Other("Transfer error"))
                 }
             },
-			_ => {
-				panic!("Passed unknown func_id to test chain extension: {}", func_id);
+            1 => {
+                // Create Item
+                let mut env = env.buf_in_buf_out();
+                let input: NFTExtCreateItem<E> = env.read_as()?;
+
+                // Contract address to AccountId32
+                let mut bytes_contract: [u8; 32] = [0; 32];
+                let addr_vec_contract: Vec<u8> = env.ext().address().encode();
+                for i in 0..32 {
+                    bytes_contract[i] = addr_vec_contract[i];
+                }
+                let sender = AccountId32::from(bytes_contract);
+
+                // Recipient to AccountId32
+                let mut bytes_rec: [u8; 32] = [0; 32];
+                let addr_vec_rec: Vec<u8> = input.owner.encode();
+                for i in 0..32 {
+                    bytes_rec[i] = addr_vec_rec[i];
+                }
+                let recipient = AccountId32::from(bytes_rec);
+
+                // Parse data
+                let cdata = input.data.encode();
+                let vdata: [u8; 0] = [0; 0];
+                let item_data = CreateItemData::NFT(CreateNftData{
+                    const_data: cdata,
+                    variable_data: vdata.to_vec()
+                });
+
+                match pallet_nft::Module::<Runtime>::create_item_internal(sender, input.collection_id, recipient, item_data) {
+                    Ok(_) => Ok(RetVal::Converging(func_id)),
+                    _ => Err(DispatchError::Other("CreateItem error"))
+                }
+            },
+            _ => {
+                panic!("Passed unknown func_id to test chain extension: {}", func_id);
             }
         }
     }

-- 
gitstuff