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nft-item-editable-DRAFT.fc
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nft-item-editable-DRAFT.fc
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;;
;; TON NFT Item Smart Contract
;;
{-
NOTE that this tokens can be transferred within the same workchain.
This is suitable for most tokens, if you need tokens transferable between workchains there are two solutions:
1) use more expensive but universal function below to calculate message forward fee for arbitrary destination (see `misc/forward-fee-calc.cs`)
2) use token holder proxies in target workchain (that way even 'non-universal' token can be used from any workchain)
-}
int min_tons_for_storage() asm "50000000 PUSHINT"; ;; 0.05 TON
;;
;; Storage
;;
;; uint64 index
;; MsgAddressInt collection_address
;; MsgAddressInt owner_address
;; cell content
;; MsgAddressInt editor_address
;;
(int, int, slice, slice, cell, slice) load_data() {
slice ds = get_data().begin_parse();
var (index, collection_address) = (ds~load_uint(64), ds~load_msg_addr());
if (ds.slice_bits() > 0) {
return (-1, index, collection_address, ds~load_msg_addr(), ds~load_ref(), ds~load_msg_addr());
} else {
return (0, index, collection_address, null(), null(), null()); ;; nft not initialized yet
}
}
() store_data(int index, slice collection_address, slice owner_address, cell content, slice editor_address) impure {
set_data(
begin_cell()
.store_uint(index, 64)
.store_slice(collection_address)
.store_slice(owner_address)
.store_ref(content)
.store_slice(editor_address)
.end_cell()
);
}
() send_msg(slice to_address, int amount, int op, int query_id, builder payload, int send_mode) impure inline {
var msg = begin_cell()
.store_uint(0x10, 6) ;; nobounce - int_msg_info$0 ihr_disabled:Bool bounce:Bool bounced:Bool packages:MsgAddress -> 011000
.store_slice(to_address)
.store_coins(amount)
.store_uint(0, 1 + 4 + 4 + 64 + 32 + 1 + 1)
.store_uint(op, 32)
.store_uint(query_id, 64);
if (~ builder_null?(payload)) {
msg = msg.store_builder(payload);
}
send_raw_message(msg.end_cell(), send_mode);
}
() transfer_ownership(int my_balance, int index, slice collection_address, slice owner_address, cell content, slice editor_address, slice sender_address, int query_id, slice in_msg_body, int fwd_fees) impure inline {
throw_unless(401, equal_slices(sender_address, owner_address));
slice new_owner_address = in_msg_body~load_msg_addr();
force_chain(new_owner_address);
slice response_destination = in_msg_body~load_msg_addr();
in_msg_body~load_int(1); ;; this nft don't use custom_payload
int forward_amount = in_msg_body~load_coins();
int rest_amount = my_balance - min_tons_for_storage();
if (forward_amount) {
rest_amount -= (forward_amount + fwd_fees);
}
int need_response = response_destination.preload_uint(2) != 0; ;; if NOT addr_none: 00
if (need_response) {
rest_amount -= fwd_fees;
}
throw_unless(402, rest_amount >= 0); ;; base nft spends fixed amount of gas, will not check for response
if (forward_amount) {
send_msg(new_owner_address, forward_amount, op::ownership_assigned(), query_id, begin_cell().store_slice(owner_address).store_slice(in_msg_body), 1); ;; paying fees, revert on errors
}
if (need_response) {
force_chain(response_destination);
send_msg(response_destination, rest_amount, op::excesses(), query_id, null(), 1); ;; paying fees, revert on errors
}
store_data(index, collection_address, new_owner_address, content, editor_address);
}
() transfer_editorship(int my_balance, int index, slice collection_address, slice owner_address, cell content, slice editor_address, slice sender_address, int query_id, slice in_msg_body, int fwd_fees) impure inline {
throw_unless(401, equal_slices(sender_address, editor_address));
slice new_editor_address = in_msg_body~load_msg_addr();
force_chain(new_editor_address);
slice response_destination = in_msg_body~load_msg_addr();
in_msg_body~load_int(1); ;; this nft don't use custom_payload
int forward_amount = in_msg_body~load_coins();
int rest_amount = my_balance - min_tons_for_storage();
if (forward_amount) {
rest_amount -= (forward_amount + fwd_fees);
}
int need_response = response_destination.preload_uint(2) != 0; ;; if NOT addr_none: 00
if (need_response) {
rest_amount -= fwd_fees;
}
throw_unless(402, rest_amount >= 0); ;; base nft spends fixed amount of gas, will not check for response
if (forward_amount) {
send_msg(new_editor_address, forward_amount, op::editorship_assigned(), query_id, begin_cell().store_slice(editor_address).store_slice(in_msg_body), 1); ;; paying fees, revert on errors
}
if (need_response) {
force_chain(response_destination);
send_msg(response_destination, rest_amount, op::excesses(), query_id, null(), 1); ;; paying fees, revert on errors
}
store_data(index, collection_address, owner_address, content, new_editor_address);
}
() recv_internal(int my_balance, int msg_value, cell in_msg_full, slice in_msg_body) impure {
if (in_msg_body.slice_empty?()) { ;; ignore empty messages
return ();
}
slice cs = in_msg_full.begin_parse();
int flags = cs~load_uint(4);
if (flags & 1) { ;; ignore all bounced messages
return ();
}
slice sender_address = cs~load_msg_addr();
cs~load_msg_addr(); ;; skip dst
cs~load_coins(); ;; skip value
cs~skip_bits(1); ;; skip extracurrency collection
cs~load_coins(); ;; skip ihr_fee
int fwd_fee = cs~load_coins(); ;; we use message fwd_fee for estimation of forward_payload costs
(int init?, int index, slice collection_address, slice owner_address, cell content, slice editor_address) = load_data();
if (~ init?) {
throw_unless(405, equal_slices(collection_address, sender_address));
store_data(index, collection_address, in_msg_body~load_msg_addr(), in_msg_body~load_ref(), in_msg_body~load_msg_addr());
return ();
}
int op = in_msg_body~load_uint(32);
int query_id = in_msg_body~load_uint(64);
if (op == op::transfer()) {
transfer_ownership(my_balance, index, collection_address, owner_address, content, editor_address, sender_address, query_id, in_msg_body, fwd_fee);
return ();
}
if (op == op::get_static_data()) {
send_msg(sender_address, 0, op::report_static_data(), query_id, begin_cell().store_uint(index, 256).store_slice(collection_address), 64); ;; carry all the remaining value of the inbound message
return ();
}
if (op == op::transfer_editorship()) {
transfer_editorship(my_balance, index, collection_address, owner_address, content, editor_address, sender_address, query_id, in_msg_body, fwd_fee);
return ();
}
if (op == op::edit_content()) {
throw_unless(410, equal_slices(sender_address, editor_address));
store_data(index, collection_address, owner_address, in_msg_body~load_ref(), editor_address);
return ();
}
throw(0xffff);
}
;;
;; GET Methods
;;
(int, int, slice, slice, cell) get_nft_data() method_id {
(int init?, int index, slice collection_address, slice owner_address, cell content, _) = load_data();
return (init?, index, collection_address, owner_address, content);
}
slice get_editor() method_id {
(_, _, _, _, _, slice editor_address) = load_data();
return editor_address;
}