Improve Fuzzing runs (#402)

* Update Fuzzing:
* add coverage generation
* fix block numeration error
* fix AFL build error
* add an EVM run

* toml sort

* fix unexistent call

evm-template/Cargo.lock

@@ -207,6 +207,15 @@ dependencies = [
  "syn 2.0.87",
 ]
 
+[[package]]
+name = "arbitrary"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dde20b3d026af13f561bdd0f15edf01fc734f0dafcedbaf42bba506a9517f223"
+dependencies = [
+ "derive_arbitrary",
+]
+
 [[package]]
 name = "ark-bls12-377"
 version = "0.4.0"
@@ -2579,6 +2588,17 @@ dependencies = [
  "syn 2.0.87",
 ]
 
+[[package]]
+name = "derive_arbitrary"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30542c1ad912e0e3d22a1935c290e12e8a29d704a420177a31faad4a601a0800"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.87",
+]
+
 [[package]]
 name = "derive_more"
 version = "0.99.18"
@@ -10657,6 +10677,7 @@ version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94b0b33c13a79f669c85defaf4c275dc86a0c0372807d0ca3d78e0bb87274863"
 dependencies = [
+ "arbitrary",
  "bytes",
  "rand",
  "ring 0.16.20",
@@ -14725,6 +14746,7 @@ dependencies = [
  "pallet-whitelist",
  "parachains-common",
  "parity-scale-codec",
+ "quinn-proto 0.9.6",
  "sp-consensus-aura",
  "sp-runtime",
  "sp-state-machine",

evm-template/template-fuzzer/Cargo.toml

@@ -15,6 +15,7 @@ workspace = true
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+quinn-proto = { version = "0.9.6", features = [ "arbitrary" ] }
 ziggy = { workspace = true }
 
 evm-runtime-template = { path = "../runtime" }

evm-template/template-fuzzer/src/main.rs

@@ -105,7 +105,8 @@ fn process_input(accounts: &[AccountId], genesis: &Storage, data: &[u8]) {
                 continue;
             }
             if lapse > 0 {
-                finalize_block(elapsed);
+                println!("\n  time spent: {elapsed:?}");
+                assert!(elapsed.as_secs() <= 2, "block execution took too much time");
 
                 block += u32::from(lapse) * 393; // 393 * 256 = 100608 which nearly corresponds to a week
                 weight = 0.into();
@@ -126,6 +127,7 @@ fn process_input(accounts: &[AccountId], genesis: &Storage, data: &[u8]) {
             println!("    call:       {extrinsic:?}");
 
             let now = Instant::now(); // We get the current time for timing purposes.
+
             #[allow(unused_variables)]
             let res = extrinsic.dispatch(RuntimeOrigin::signed(origin));
             elapsed += now.elapsed();
@@ -133,7 +135,7 @@ fn process_input(accounts: &[AccountId], genesis: &Storage, data: &[u8]) {
             println!("    result:     {res:?}");
         }
 
-        finalize_block(elapsed);
+        Executive::finalize_block();
 
         check_invariants(block, initial_total_issuance);
     });
@@ -142,11 +144,14 @@ fn process_input(accounts: &[AccountId], genesis: &Storage, data: &[u8]) {
 fn initialize_block(block: u32) {
     println!("\ninitializing block {}", block);
 
-    let current_timestamp = u64::from(block) * SLOT_DURATION;
+    let current_timestamp = u64::from(block) * SLOT_DURATION * 2;
 
     let prev_header = match block {
         1 => None,
-        _ => Some(Executive::finalize_block()),
+        _ => {
+            println!("  finalizing block");
+            Some(Executive::finalize_block())
+        }
     };
 
     let parent_header = &Header::new(
@@ -280,14 +285,6 @@ fn recursive_call_filter(call: &RuntimeCall, origin: usize) -> bool {
     }
 }
 
-fn finalize_block(elapsed: Duration) {
-    println!("\n  time spent: {elapsed:?}");
-    assert!(elapsed.as_secs() <= 2, "block execution took too much time");
-
-    println!("  finalizing block");
-    Executive::finalize_block();
-}
-
 fn check_invariants(block: u32, initial_total_issuance: Balance) {
     let mut counted_free = 0;
     let mut counted_reserved = 0;