Feat/blocksimulate endpoint

stackslib/Cargo.toml

@@ -81,6 +81,10 @@ developer-mode = ["clarity/developer-mode"]
 monitoring_prom = ["prometheus"]
 slog_json = ["stacks-common/slog_json", "clarity/slog_json", "pox-locking/slog_json"]
 testing = ["chrono", "stacks-common/testing", "clarity/testing"]
+profiler = ["perf-event2"]
+
+[target.'cfg(all(target_os = "linux", target_arch = "x86_64"))'.dependencies]
+perf-event2 = { version = "0.7.4", optional = true }
 
 [target.'cfg(all(any(target_arch = "x86_64", target_arch = "x86", target_arch = "aarch64"), not(any(target_os="windows"))))'.dependencies]
 sha2 = { version = "0.10", features = ["asm"] }

stackslib/src/chainstate/stacks/db/mod.rs

@@ -606,6 +606,10 @@ impl<'a, 'b> ClarityTx<'a, 'b> {
             })
             .expect("FATAL: `ust-liquid-supply` overflowed");
     }
+
+    pub fn disable_fees(&mut self) {
+        self.block.no_fees = true;
+    }
 }
 
 pub struct ChainstateTx<'a> {

stackslib/src/chainstate/stacks/db/transactions.rs

@@ -564,6 +564,7 @@ impl StacksChainState {
         }
 
         StacksChainState::account_debit(clarity_tx, &payer_account.principal, fee);
+
         Ok(fee)
     }
 
@@ -1554,6 +1555,8 @@ impl StacksChainState {
         debug!("Process transaction {} ({})", tx.txid(), tx.payload.name());
         let epoch = clarity_block.get_epoch();
 
+        let no_fees = clarity_block.block.no_fees;
+
         StacksChainState::process_transaction_precheck(&clarity_block.config, tx, epoch)?;
 
         // what version of Clarity did the transaction caller want? And, is it valid now?
@@ -1578,7 +1581,10 @@ impl StacksChainState {
 
             let payer_address = payer_account.principal.clone();
             let payer_nonce = payer_account.nonce;
-            StacksChainState::pay_transaction_fee(&mut transaction, fee, payer_account)?;
+
+            if !no_fees {
+                StacksChainState::pay_transaction_fee(&mut transaction, fee, payer_account)?;
+            }
 
             // origin balance may have changed (e.g. if the origin paid the tx fee), so reload the account
             let origin_account =
@@ -1619,8 +1625,10 @@ impl StacksChainState {
                 None,
             )?;
 
-            let new_payer_account = StacksChainState::get_payer_account(&mut transaction, tx);
-            StacksChainState::pay_transaction_fee(&mut transaction, fee, new_payer_account)?;
+            if !no_fees {
+                let new_payer_account = StacksChainState::get_payer_account(&mut transaction, tx);
+                StacksChainState::pay_transaction_fee(&mut transaction, fee, new_payer_account)?;
+            }
 
             // update the account nonces
             StacksChainState::update_account_nonce(

stackslib/src/clarity_vm/clarity.rs

@@ -117,6 +117,7 @@ pub struct ClarityBlockConnection<'a, 'b> {
     mainnet: bool,
     chain_id: u32,
     epoch: StacksEpochId,
+    pub no_fees: bool,
 }
 
 ///
@@ -318,6 +319,7 @@ impl ClarityBlockConnection<'_, '_> {
             mainnet: false,
             chain_id: CHAIN_ID_TESTNET,
             epoch,
+            no_fees: false,
         }
     }
 
@@ -444,6 +446,7 @@ impl ClarityInstance {
             mainnet: self.mainnet,
             chain_id: self.chain_id,
             epoch: epoch.epoch_id,
+            no_fees: false,
         }
     }
 
@@ -468,6 +471,7 @@ impl ClarityInstance {
             mainnet: self.mainnet,
             chain_id: self.chain_id,
             epoch,
+            no_fees: false,
         }
     }
 
@@ -494,6 +498,7 @@ impl ClarityInstance {
             mainnet: self.mainnet,
             chain_id: self.chain_id,
             epoch,
+            no_fees: false,
         };
 
         let use_mainnet = self.mainnet;
@@ -590,6 +595,7 @@ impl ClarityInstance {
             mainnet: self.mainnet,
             chain_id: self.chain_id,
             epoch,
+            no_fees: false,
         };
 
         let use_mainnet = self.mainnet;
@@ -698,6 +704,7 @@ impl ClarityInstance {
             mainnet: self.mainnet,
             chain_id: self.chain_id,
             epoch: epoch.epoch_id,
+            no_fees: false,
         }
     }
 
@@ -738,6 +745,7 @@ impl ClarityInstance {
             mainnet: self.mainnet,
             chain_id: self.chain_id,
             epoch: epoch.epoch_id,
+            no_fees: false,
         }
     }