feat: exposes necessary methods on heap newtype (matter-labs#43)

Co-authored-by: Joonatan Saarhelo <[email protected]>

Author: montekki

Diff for: Cargo.toml

@@ -14,7 +14,7 @@ u256 = { package = "primitive-types", version = "0.12.1" }
 enum_dispatch = "0.3"
 arbitrary = { version = "1", features = ["derive"], optional = true }
 zk_evm = { git = "https://github.com/matter-labs/era-zk_evm.git", branch = "v1.5.0", optional = true }
-anyhow = { optional = true }
+anyhow = { version = "1", optional = true }
 
 [dev-dependencies]
 divan = "0.1"

Diff for: src/heap.rs

@@ -20,6 +20,12 @@ impl HeapId {
 #[derive(Debug, Clone, PartialEq)]
 pub struct Heap(Vec<u8>);
 
+impl Heap {
+    pub fn reserve(&mut self, additional: usize) {
+        self.0.reserve_exact(additional);
+    }
+}
+
 impl HeapInterface for Heap {
     fn read_u256(&self, start_address: u32) -> U256 {
         self.read_u256_partially(start_address..start_address + 32)