Require minimum storage stake

Ouch-Metaverse-Dao · Apr 20, 2022 · b0fceab · b0fceab
1 parent c2af047
commit b0fceab
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Showing 2 changed files with 17 additions and 2 deletions.
diff --git a/mintbase-deps/src/constants.rs b/mintbase-deps/src/constants.rs
@@ -116,7 +116,8 @@ pub const ROYALTY_UPPER_LIMIT: u32 = 5000;
 /// Maximum payout (royalties + splits) participants to process
 pub const MAX_LEN_PAYOUT: u32 = 50;
 
-// pub const MINIMUM_CUSHION: near_sdk::Balance = 5 * 10u128.pow(23);
+/// Minimum storage stake required to allow updates
+pub const MINIMUM_FREE_STORAGE_STAKE: near_sdk::Balance = 50 * YOCTO_PER_BYTE;
 
 //?
 

diff --git a/store/src/minting.rs b/store/src/minting.rs
@@ -5,7 +5,10 @@ use mintbase_deps::common::{
     SplitOwners,
     TokenMetadata,
 };
-use mintbase_deps::constants::MAX_LEN_PAYOUT;
+use mintbase_deps::constants::{
+    MAX_LEN_PAYOUT,
+    MINIMUM_FREE_STORAGE_STAKE,
+};
 use mintbase_deps::logging::{
     log_grant_minter,
     log_nft_batch_mint,
@@ -136,6 +139,17 @@ impl MintbaseStore {
         self.tokens_per_owner.insert(&owner_id, &owned_set);
 
         let minted = self.tokens_minted;
+
+        // check if sufficient storage stake (e.g. 0.5 NEAR) remains
+        let used_storage_stake: Balance = env::storage_usage() as u128 * env::storage_byte_cost();
+        let free_storage_stake: Balance = env::account_balance() - used_storage_stake;
+        near_assert!(
+            free_storage_stake > MINIMUM_FREE_STORAGE_STAKE,
+            "A minimum of {} yoctoNEAR is required as free contract balance to allow updates (currently: {})",
+            MINIMUM_FREE_STORAGE_STAKE,
+            free_storage_stake
+        );
+
         log_nft_batch_mint(
             minted - num_to_mint,
             minted - 1,