feat: add zero balance accounts

chain/chain/src/tests/simple_chain.rs

@@ -43,7 +43,7 @@ fn build_chain() {
     //     cargo insta test --accept -p near-chain --features nightly -- tests::simple_chain::build_chain
     let hash = chain.head().unwrap().last_block_hash;
     if cfg!(feature = "nightly") {
-        insta::assert_display_snapshot!(hash, @"96KiRJdbMN8A9cFPXarZdaRQ8U2HvYcrGTGC8a4EgFzM");
+        insta::assert_display_snapshot!(hash, @"7f7HTgxYS9NbF61kqqQSD4ivtPj7hCReXqyMMqiUfMZq");
     } else {
         insta::assert_display_snapshot!(hash, @"7r5VSLXhkxHHEeiAAPQbKPGv3rr877obehGYwPbKZMA7");
     }
@@ -73,7 +73,7 @@ fn build_chain() {
 
     let hash = chain.head().unwrap().last_block_hash;
     if cfg!(feature = "nightly") {
-        insta::assert_display_snapshot!(hash, @"4eW4jvyu1Ek6WmY3EuUoFFkrascC7svRww5UcZbNMkUf");
+        insta::assert_display_snapshot!(hash, @"5GXKgTvpLBcSDncu3P8tdmFZ48m89rzUivJEtDTjp6oq");
     } else {
         insta::assert_display_snapshot!(hash, @"9772sSKzm1eGPV3pRi17YaZkotrcN6dAkJUn226CopTm");
     }

core/primitives/Cargo.toml

@@ -51,6 +51,7 @@ protocol_feature_reject_blocks_with_outdated_protocol_version = []
 protocol_feature_ed25519_verify = [
   "near-primitives-core/protocol_feature_ed25519_verify"
 ]
+protocol_feature_zero_balance_account = []
 protocol_feature_nep366_delegate_action = [
   "near-primitives-core/protocol_feature_nep366_delegate_action"
 ]
@@ -61,6 +62,7 @@ nightly = [
   "protocol_feature_reject_blocks_with_outdated_protocol_version",
   "protocol_feature_ed25519_verify",
   "protocol_feature_nep366_delegate_action",
+  "protocol_feature_zero_balance_account"
 ]
 
 nightly_protocol = []

core/primitives/src/runtime/mod.rs

@@ -1,42 +1,8 @@
 pub use near_primitives_core::runtime::fees;
 pub use near_primitives_core::runtime::*;
 
-use crate::account::Account;
-use crate::runtime::config::RuntimeConfig;
-use crate::types::Balance;
-
 pub mod apply_state;
 pub mod config;
 pub mod config_store;
 pub mod migration_data;
 pub mod parameter_table;
-
-/// Checks if given account has enough balance for storage stake, and returns:
-///  - None if account has enough balance,
-///  - Some(insufficient_balance) if account doesn't have enough and how much need to be added,
-///  - Err(message) if account has invalid storage usage or amount/locked.
-///
-/// Read details of state staking
-/// <https://nomicon.io/Economics/README.html#state-stake>.
-pub fn get_insufficient_storage_stake(
-    account: &Account,
-    runtime_config: &RuntimeConfig,
-) -> Result<Option<Balance>, String> {
-    let required_amount = Balance::from(account.storage_usage())
-        .checked_mul(runtime_config.storage_amount_per_byte())
-        .ok_or_else(|| {
-            format!("Account's storage_usage {} overflows multiplication", account.storage_usage())
-        })?;
-    let available_amount = account.amount().checked_add(account.locked()).ok_or_else(|| {
-        format!(
-            "Account's amount {} and locked {} overflow addition",
-            account.amount(),
-            account.locked()
-        )
-    })?;
-    if available_amount >= required_amount {
-        Ok(None)
-    } else {
-        Ok(Some(required_amount - available_amount))
-    }
-}

core/primitives/src/version.rs

@@ -149,6 +149,9 @@ pub enum ProtocolFeature {
     RejectBlocksWithOutdatedProtocolVersions,
     #[cfg(feature = "protocol_feature_nep366_delegate_action")]
     DelegateAction,
+    #[cfg(feature = "protocol_feature_zero_balance_account")]
+    /// NEP 448: https://github.com/near/NEPs/pull/448
+    ZeroBalanceAccount,
 }
 
 /// Both, outgoing and incoming tcp connections to peers, will be rejected if `peer's`
@@ -163,7 +166,7 @@ const STABLE_PROTOCOL_VERSION: ProtocolVersion = 58;
 /// Largest protocol version supported by the current binary.
 pub const PROTOCOL_VERSION: ProtocolVersion = if cfg!(feature = "nightly_protocol") {
     // On nightly, pick big enough version to support all features.
-    133
+    134
 } else {
     // Enable all stable features.
     STABLE_PROTOCOL_VERSION
@@ -238,6 +241,8 @@ impl ProtocolFeature {
             ProtocolFeature::RejectBlocksWithOutdatedProtocolVersions => 132,
             #[cfg(feature = "protocol_feature_nep366_delegate_action")]
             ProtocolFeature::DelegateAction => 133,
+            #[cfg(feature = "protocol_feature_zero_balance_account")]
+            ProtocolFeature::ZeroBalanceAccount => 134,
         }
     }
 }

integration-tests/Cargo.toml

@@ -75,12 +75,15 @@ protocol_feature_reject_blocks_with_outdated_protocol_version = [
   "near-chain/protocol_feature_reject_blocks_with_outdated_protocol_version"
 ]
 protocol_feature_flat_state = ["nearcore/protocol_feature_flat_state"]
+protocol_feature_zero_balance_account = ["node-runtime/protocol_feature_zero_balance_account"]
+
 nightly = [
   "nightly_protocol",
   "nearcore/nightly",
   "protocol_feature_fix_contract_loading_cost",
   "protocol_feature_reject_blocks_with_outdated_protocol_version",
   "protocol_feature_flat_state",
+  "protocol_feature_zero_balance_account"
 ]
 nightly_protocol = ["nearcore/nightly_protocol"]
 sandbox = [

integration-tests/src/tests/client/features.rs

@@ -13,3 +13,5 @@ mod limit_contract_functions_number;
 mod lower_storage_key_limit;
 mod restore_receipts_after_fix_apply_chunks;
 mod wasmer2;
+#[cfg(feature = "protocol_feature_zero_balance_account")]
+mod zero_balance_account;