instant buy - first attempt

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "contracts/dns-contract"]
-	path = contracts/dns-contract
-	url = https://github.com/ton-blockchain/dns-contract.git

contracts/dns-contract

@@ -1 +0,0 @@
-Subproject commit d08131031fb659d2826cccc417ddd9b98476f814

contracts/imports/op-codes.fc

@@ -17,6 +17,7 @@ int op::editorship_assigned() asm "0x511a4463 PUSHINT";
 
 ;; Collection
 int op::new_nft() asm "0x1a039a51 PUSHINT";
+int op::instant_buy_new_nft() asm "16c7d435 PUSHINT";
 
 ;; DNS
 const int op::fill_up = 0x370fec51;

contracts/main.fc

@@ -90,20 +90,35 @@ slice calculate_nft_item_address(int wc, cell state_init) {
             .begin_parse();
 }
 
+cell pack_state(cell content, cell nft_item_code, int index, slice collection_address, slice owner_address, cell domain, cell auction, int last_fill_up_time) impure {
+    return begin_cell()
+		   .store_ref(nft_item_code)
+           .store_uint(index, 256)
+           .store_slice(collection_address)
+           .store_slice(owner_address)
+           .store_ref(content)
+           .store_ref(domain)
+           .store_dict(auction)
+           .store_uint(last_fill_up_time, 64)
+           .end_cell();
+}
+
 ;; Serialize the data using the storage schema
 () store_data(cell content, cell nft_item_code, int index, slice collection_address, slice owner_address, cell domain, cell auction, int last_fill_up_time) impure {
-    set_data(
-            begin_cell()
-					.store_ref(nft_item_code)
-                    .store_uint(index, 256)
-                    .store_slice(collection_address)
-                    .store_slice(owner_address)
-                    .store_ref(content)
-                    .store_ref(domain)
-                    .store_dict(auction)
-                    .store_uint(last_fill_up_time, 64)
-                    .end_cell()
-    );
+    ;; set_data(
+    ;;         begin_cell()
+	;; 				.store_ref(nft_item_code)
+    ;;                 .store_uint(index, 256)
+    ;;                 .store_slice(collection_address)
+    ;;                 .store_slice(owner_address)
+    ;;                 .store_ref(content)
+    ;;                 .store_ref(domain)
+    ;;                 .store_dict(auction)
+    ;;                 .store_uint(last_fill_up_time, 64)
+    ;;                 .end_cell()
+    ;; );
+
+    set_data(pack_state(content, nft_item_code, index, collection_address, owner_address, domain, auction, last_fill_up_time));
 }
 
 () send_msg(slice to_address, int amount, int op, int query_id, builder payload, int send_mode) impure inline {
@@ -186,6 +201,42 @@ slice calculate_nft_item_address(int wc, cell state_init) {
     send_raw_message(msg.end_cell(), 64); ;; carry all the remaining value of the inbound message, fee deducted from amount
 }
 
+cell pack_nft_item_state(cell nft_item_code, cell data) impure {
+    return begin_cell().store_uint(0, 2).store_dict(nft_item_code).store_dict(data).store_uint(0, 1).end_cell();
+}
+
+() deploy_bought_item(int item_index, cell code, slice owner_address, slice domain) impure {
+    ;;  cell nft_item_code
+    ;;  uint256 index                      ---       The index of this item in the collection
+    ;;  MsgAddressInt collection_address
+    ;;  MsgAddressInt owner_address
+    ;;  cell content                       ---       The key-value map with the content both as item and a collection)
+    ;;  cell domain                        ---       e.g contains "alice" (without ending \0) for "alice.ton" domain
+    ;;  cell auction                       ---       auction info: (address max_bid_address, coins max_bid, uint32 end_time)
+    ;;  int last_fill_up_time
+    cell init_data = begin_cell()
+        .store_ref(code) 
+        .store_uint(item_index, 256)
+        .store_slice(my_address())
+        .store_slice(owner_address)
+        .store_dict(null())
+        .store_ref(begin_cell().store_uint(1, 1).store_slice(domain).end_cell()) ;; TODO: snake cell
+        .store_dict(null())
+        .store_uint(0, 64)
+        .end_cell();
+    
+    cell state_init = pack_nft_item_state(code, init_data);
+    slice nft_address = calculate_nft_item_address(workchain(), state_init);
+    var msg = begin_cell()
+            .store_uint(0x18, 6)
+            .store_slice(nft_address)
+            .store_coins(0)
+            .store_uint(4 + 2 + 1, 1 + 4 + 4 + 64 + 32 + 1 + 1 + 1)
+            .store_ref(state_init)
+            .store_uint(1, 1);  ;; the content of the NFT item, will be treated as the parameter of the first incoming message
+    send_raw_message(msg.end_cell(), 64); ;; carry all the remaining value of the inbound message, fee deducted from amount
+}
+
 () recv_internal(int msg_value, cell in_msg_full, slice in_msg_body) impure {
     if (in_msg_body.slice_empty?()) { ;; bounce back empty messages
         throw(0xffff);
@@ -228,6 +279,10 @@ slice calculate_nft_item_address(int wc, cell state_init) {
         if (months > 12) {
             months = 12;
         }
+
+        ;; move this to auction data: auction_start_time, auction_start_duration, auction_end_duration, auction_prolongation, price_multiplicator
+        ;; instant buy: 
+
         ;; The auction duration becomes shorter over time
         int duration = auction_start_duration - (auction_start_duration - auction_end_duration) * months / 12;
 
@@ -259,6 +314,33 @@ slice calculate_nft_item_address(int wc, cell state_init) {
         store_data(content, item_code, index, collection_address, owner_address, domain, auction, last_fill_up_time);
     }
 
+    if (op == op::instant_buy_new_nft()) {
+        ;; parsing of the signed 'option'
+        ;; signature structure: (receiver_addr, collection_address, )
+        cell option_data = in_msg_body~load_ref();
+        cell signature = in_msg_body~load_ref();
+        slice reader = option_data.begin_parse();
+
+        slice receiver_addr = reader~load_msg_addr();
+        slice issued_collection_addr = reader~load_msg_addr();
+        int amount = reader~load_uint(256);
+        slice new_domain = reader;
+        throw_unless(411, slice_bits(new_domain) > 0);
+        throw_unless(412, equal_slices(receiver_addr, sender_address)); ;; TODO: Unsure here
+        throw_unless(413, equal_slices(issued_collection_addr, my_address()));
+        int success = check_data_signature(option_data.begin_parse(), signature.begin_parse(), owner_address);
+        throw_unless(413, success);
+        throw_unless(414, msg_value > amount);
+
+        amount_to_send = msg_value - amount; ;; TODO: Handle this later, reroute coins
+
+        int new_item_index = slice_hash(new_domain);
+        deploy_bought_item(item_index, cell item_code, slice receiver_addr, slice new_domain);
+        return ();
+
+        ;; init_state = pack_state(... add domain here ...)
+        ;; use modified function `deploy_nft_item` <- init_state
+    }
     if (op == op::new_nft()) {
         throw_unless(401, equal_slices(sender_address, owner_address));
         ;; TODO (this is like the most important part)