pow: simplify concurrency pipeline

Cargo.lock

@@ -3335,18 +3335,17 @@ dependencies = [
 name = "tests-pow"
 version = "0.0.0"
 dependencies = [
+ "crossbeam",
  "cuprate-consensus-rules",
  "cuprate-cryptonight",
- "function_name",
+ "futures",
  "hex",
  "hex-literal",
  "monero-serai",
  "randomx-rs",
- "rayon",
  "reqwest",
  "serde",
  "serde_json",
- "thread_local",
  "tokio",
 ]
 

consensus/rules/src/blocks.rs

@@ -60,10 +60,10 @@ pub const fn is_randomx_seed_height(height: usize) -> bool {
 ///
 /// ref: <https://monero-book.cuprate.org/consensus_rules/blocks.html#randomx-seed>
 pub const fn randomx_seed_height(height: usize) -> usize {
-    if height <= RX_SEEDHASH_EPOCH_BLOCKS + RX_SEEDHASH_EPOCH_LAG {
+    if height <= 2048 + 64 {
         0
     } else {
-        (height - RX_SEEDHASH_EPOCH_LAG - 1) & !(RX_SEEDHASH_EPOCH_BLOCKS - 1)
+        (height - 64 - 1) & !(2048 - 1)
     }
 }
 

tests/monero-serai/Cargo.toml

@@ -11,6 +11,7 @@ serde_json   = { workspace = true, features = ["std"] }
 tokio        = { workspace = true, features = ["full"] }
 reqwest      = { workspace = true, features = ["json"] }
 rayon        = { workspace = true }
+# rand        = { workspace = true, features = ["std", "std_rng"] }
 futures      = { workspace = true, features = ["std"] }
 
 [lints]

tests/monero-serai/src/rpc.rs

@@ -1,6 +1,7 @@
 use std::{
     collections::{BTreeSet, HashSet},
     sync::{atomic::Ordering, LazyLock},
+    time::Instant,
 };
 
 use hex::serde::deserialize;
@@ -39,6 +40,8 @@ pub(crate) struct BlockHeader {
 pub(crate) struct RpcClient {
     client: Client,
     rpc_url: String,
+    json_rpc_url: String,
+    get_transactions_url: String,
     pub top_height: usize,
 }
 
@@ -72,8 +75,11 @@ impl RpcClient {
             "params": {}
         });
 
+        let json_rpc_url = format!("{rpc_url}/json_rpc");
+        let get_transactions_url = format!("{rpc_url}/get_transactions");
+
         let top_height = client
-            .get(format!("{rpc_url}/json_rpc"))
+            .get(&json_rpc_url)
             .json(&request)
             .send()
             .await
@@ -90,6 +96,8 @@ impl RpcClient {
         Self {
             client,
             rpc_url,
+            json_rpc_url,
+            get_transactions_url,
             top_height,
         }
     }
@@ -108,20 +116,16 @@ impl RpcClient {
             pub pruned_as_hex: String,
         }
 
-        let url = format!("{}/get_transactions", self.rpc_url);
-
         let txs_hashes = tx_hashes
             .into_iter()
             .map(hex::encode)
             .collect::<Vec<String>>();
 
-        let request = json!({
-            "txs_hashes": txs_hashes,
-        });
+        let request = json!({"txs_hashes":txs_hashes});
 
         let txs = self
             .client
-            .get(&url)
+            .get(&self.get_transactions_url)
             .json(&request)
             .send()
             .await
@@ -145,7 +149,11 @@ impl RpcClient {
             .collect()
     }
 
-    #[expect(clippy::significant_drop_tightening)]
+    #[expect(
+        clippy::cast_possible_truncation,
+        clippy::cast_sign_loss,
+        clippy::significant_drop_tightening
+    )]
     pub(crate) async fn get_block_test_batch(&self, heights: BTreeSet<usize>) {
         #[derive(Debug, Clone, Deserialize)]
         struct JsonRpcResponse {
@@ -159,9 +167,9 @@ impl RpcClient {
             pub block_header: BlockHeader,
         }
 
-        let tasks = heights.into_iter().map(|height| {
-            let json_rpc_url = format!("{}/json_rpc", self.rpc_url);
+        let now = Instant::now();
 
+        let tasks = heights.into_iter().map(|height| {
             let request = json!({
                 "jsonrpc": "2.0",
                 "id": 0,
@@ -169,7 +177,9 @@ impl RpcClient {
                 "params": {"height": height}
             });
 
-            let task = tokio::task::spawn(self.client.get(&json_rpc_url).json(&request).send());
+            let task =
+                tokio::task::spawn(self.client.get(&self.json_rpc_url).json(&request).send());
+            // tokio::task::spawn(self.client.get(&*self.nodes.rand()).json(&request).send());
 
             (height, task)
         });
@@ -286,8 +296,16 @@ impl RpcClient {
 
                 let percent = (progress as f64 / top_height as f64) * 100.0;
 
+                let elapsed = now.elapsed().as_secs_f64();
+                let secs_per_hash = elapsed / progress as f64;
+                let bps = progress as f64 / elapsed;
+                let remaining_secs = (top_height as f64 - progress as f64) * secs_per_hash;
+                let h = (remaining_secs / 60.0 / 60.0) as u64;
+                let m = (remaining_secs / 60.0 % 60.0) as u64;
+                let s = (remaining_secs % 60.0) as u64;
+
                 println!(
-                    "progress        | {progress}/{top_height} ({percent:.2}%)
+                    "progress        | {progress}/{top_height} ({percent:.2}%, {bps:.2} blocks/sec, {h}h {m}m {s}s left)
 tx_count        | {tx_count}
 hash            | {}
 miner_tx_hash   | {}

tests/pow/Cargo.toml

@@ -4,11 +4,11 @@ version = "0.0.0"
 edition = "2021"
 
 [dependencies]
-cuprate-cryptonight     = { workspace = true }
 cuprate-consensus-rules = { workspace = true }
+cuprate-cryptonight = { workspace = true }
 
-function_name = { workspace = true }
-thread_local  = { workspace = true }
+crossbeam    = { workspace = true, features = ["std"] }
+futures      = { workspace = true, features = ["std"] }
 monero-serai = { workspace = true }
 hex          = { workspace = true, features = ["serde", "std"] }
 hex-literal  = { workspace = true }
@@ -16,7 +16,6 @@ serde         = { workspace = true, features = ["derive"] }
 serde_json   = { workspace = true, features = ["std"] }
 tokio        = { workspace = true, features = ["full"] }
 reqwest      = { workspace = true, features = ["json"] }
-rayon         = { workspace = true }
 randomx-rs   = { workspace = true }
 
 [lints]

tests/pow/src/cryptonight.rs

@@ -0,0 +1,62 @@
+use std::fmt::Display;
+
+use hex_literal::hex;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub(crate) enum CryptoNightHash {
+    V0,
+    V1,
+    V2,
+    R,
+}
+
+impl CryptoNightHash {
+    /// The last height this hash function is used for proof-of-work.
+    pub(crate) const fn from_height(height: u64) -> Self {
+        if height < 1546000 {
+            Self::V0
+        } else if height < 1685555 {
+            Self::V1
+        } else if height < 1788000 {
+            Self::V2
+        } else if height < 1978433 {
+            Self::R
+        } else {
+            panic!("height is large than 1978433");
+        }
+    }
+
+    pub(crate) fn hash(data: &[u8], height: u64) -> (&'static str, [u8; 32]) {
+        let this = Self::from_height(height);
+
+        let hash = match Self::from_height(height) {
+            Self::V0 => {
+                if height == 202612 {
+                    hex!("84f64766475d51837ac9efbef1926486e58563c95a19fef4aec3254f03000000")
+                } else {
+                    cuprate_cryptonight::cryptonight_hash_v0(data)
+                }
+            }
+            Self::V1 => cuprate_cryptonight::cryptonight_hash_v1(data).unwrap(),
+            Self::V2 => cuprate_cryptonight::cryptonight_hash_v2(data),
+            Self::R => cuprate_cryptonight::cryptonight_hash_r(data, height),
+        };
+
+        (this.as_str(), hash)
+    }
+
+    pub(crate) const fn as_str(self) -> &'static str {
+        match self {
+            Self::V0 => "cryptonight_v0",
+            Self::V1 => "cryptonight_v1",
+            Self::V2 => "cryptonight_v2",
+            Self::R => "cryptonight_r",
+        }
+    }
+}
+
+impl Display for CryptoNightHash {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str((*self).as_str())
+    }
+}

tests/pow/src/main.rs

@@ -1,11 +1,25 @@
+mod cryptonight;
+mod randomx;
 mod rpc;
+mod verify;
 
 use std::{
-    sync::atomic::{AtomicUsize, Ordering},
+    sync::atomic::{AtomicU64, Ordering},
     time::{Duration, Instant},
 };
 
-pub static TESTED_BLOCK_COUNT: AtomicUsize = AtomicUsize::new(0);
+use crate::rpc::GetBlockResponse;
+
+pub const RANDOMX_START_HEIGHT: u64 = 1978433;
+pub static TESTED_BLOCK_COUNT: AtomicU64 = AtomicU64::new(0);
+
+#[derive(Debug)]
+pub struct VerifyData {
+    pub get_block_response: GetBlockResponse,
+    pub height: u64,
+    pub seed_height: u64,
+    pub seed_hash: [u8; 32],
+}
 
 #[tokio::main]
 async fn main() {
@@ -25,32 +39,32 @@ async fn main() {
         println!("VERBOSE: false");
     }
 
-    let mut client = rpc::RpcClient::new(rpc_url).await;
+    let client = rpc::RpcClient::new(rpc_url).await;
+    let top_height = client.top_height;
+    println!("top_height: {top_height}");
 
-    let top_height = if let Ok(Ok(h)) = std::env::var("TOP_HEIGHT").map(|s| s.parse()) {
-        client.top_height = h;
-        println!("TOP_HEIGHT (found): {h}");
-        h
+    let threads = if let Ok(Ok(c)) = std::env::var("THREADS").map(|s| s.parse()) {
+        println!("THREADS (found): {c}");
+        c
     } else {
-        println!("TOP_HEIGHT (off, using latest): {}", client.top_height);
-        client.top_height
+        let c = std::thread::available_parallelism().unwrap().get();
+        println!("THREADS (off): {c}");
+        c
     };
 
     println!();
 
-    tokio::join!(
-        client.cryptonight_v0(),
-        client.cryptonight_v1(),
-        client.cryptonight_v2(),
-        client.cryptonight_r(),
-        client.randomx(),
-    );
+    // Test RandomX.
+    let (tx, rx) = crossbeam::channel::unbounded();
+    verify::spawn_verify_pool(threads, top_height, rx);
+    client.test(top_height, tx).await;
 
+    // Wait for other threads to finish.
     loop {
         let count = TESTED_BLOCK_COUNT.load(Ordering::Acquire);
 
         if top_height == count {
-            println!("finished all PoW, took {}s", now.elapsed().as_secs());
+            println!("finished, took {}s", now.elapsed().as_secs());
             std::process::exit(0);
         }
 

tests/pow/src/randomx.rs

@@ -0,0 +1,43 @@
+use randomx_rs::{RandomXCache, RandomXDataset, RandomXFlag, RandomXVM};
+
+/// Returns a [`RandomXVM`] with no optimization flags (default, light-verification).
+pub(crate) fn randomx_vm_default(seed_hash: &[u8; 32]) -> RandomXVM {
+    const FLAG: RandomXFlag = RandomXFlag::FLAG_DEFAULT;
+
+    let cache = RandomXCache::new(FLAG, seed_hash).unwrap();
+    RandomXVM::new(FLAG, Some(cache), None).unwrap()
+}
+
+/// Returns a [`RandomXVM`] with most optimization flags.
+pub(crate) fn randomx_vm_optimized(seed_hash: &[u8; 32]) -> RandomXVM {
+    // TODO: conditional FLAG_LARGE_PAGES, FLAG_JIT
+
+    let mut vm_flag = RandomXFlag::FLAG_FULL_MEM;
+    let mut cache_flag = RandomXFlag::empty();
+
+    #[cfg(target_arch = "x86_64")]
+    for flag in [&mut vm_flag, &mut cache_flag] {
+        if is_x86_feature_detected!("aes") {
+            *flag |= RandomXFlag::FLAG_HARD_AES;
+        }
+
+        match (
+            is_x86_feature_detected!("ssse3"),
+            is_x86_feature_detected!("avx2"),
+        ) {
+            (true, _) => *flag |= RandomXFlag::FLAG_ARGON2_SSSE3,
+            (_, true) => *flag |= RandomXFlag::FLAG_ARGON2_AVX2,
+            (_, _) => *flag |= RandomXFlag::FLAG_ARGON2,
+        }
+    }
+
+    let hash = hex::encode(seed_hash);
+
+    println!("Generating RandomX VM: seed_hash: {hash}, flags: {vm_flag:#?}");
+    let cache = RandomXCache::new(cache_flag, seed_hash).unwrap();
+    let dataset = RandomXDataset::new(RandomXFlag::FLAG_DEFAULT, cache, 0).unwrap();
+    let vm = RandomXVM::new(vm_flag, None, Some(dataset)).unwrap();
+    println!("Generating RandomX VM: seed_hash: {hash}, flags: {vm_flag:#?} ... OK");
+
+    vm
+}

tests/pow/src/rpc.rs

@@ -1,23 +1,15 @@
-use std::{
-    collections::BTreeMap,
-    ops::Range,
-    sync::{atomic::Ordering, Mutex},
-};
+use std::time::Duration;
 
-use function_name::named;
+use crossbeam::channel::Sender;
 use hex::serde::deserialize;
-use hex_literal::hex;
-use monero_serai::block::Block;
-use randomx_rs::{RandomXCache, RandomXFlag, RandomXVM};
 use reqwest::{
     header::{HeaderMap, HeaderValue},
     Client, ClientBuilder,
 };
 use serde::Deserialize;
 use serde_json::{json, Value};
-use thread_local::ThreadLocal;
 
-use crate::TESTED_BLOCK_COUNT;
+use crate::{VerifyData, RANDOMX_START_HEIGHT};
 
 #[derive(Debug, Clone, Deserialize)]
 struct JsonRpcResponse {
@@ -25,14 +17,14 @@ struct JsonRpcResponse {
 }
 
 #[derive(Debug, Clone, Deserialize)]
-struct GetBlockResponse {
+pub struct GetBlockResponse {
     #[serde(deserialize_with = "deserialize")]
     pub blob: Vec<u8>,
     pub block_header: BlockHeader,
 }
 
 #[derive(Debug, Clone, Deserialize)]
-struct BlockHeader {
+pub struct BlockHeader {
     #[serde(deserialize_with = "deserialize")]
     pub pow_hash: Vec<u8>,
     #[serde(deserialize_with = "deserialize")]
@@ -42,8 +34,8 @@ struct BlockHeader {
 #[derive(Debug, Clone)]
 pub(crate) struct RpcClient {
     client: Client,
-    rpc_url: String,
-    pub top_height: usize,
+    json_rpc_url: String,
+    pub top_height: u64,
 }
 
 impl RpcClient {
@@ -66,8 +58,10 @@ impl RpcClient {
             "params": {}
         });
 
+        let json_rpc_url = format!("{rpc_url}/json_rpc");
+
         let top_height = client
-            .get(format!("{rpc_url}/json_rpc"))
+            .get(&json_rpc_url)
             .json(&request)
             .send()
             .await
@@ -82,20 +76,18 @@ impl RpcClient {
             .get("height")
             .unwrap()
             .as_u64()
-            .unwrap()
-            .try_into()
             .unwrap();
 
         assert!(top_height > 3301441, "node is behind");
 
         Self {
             client,
-            rpc_url,
+            json_rpc_url,
             top_height,
         }
     }
 
-    async fn get_block(&self, height: usize) -> GetBlockResponse {
+    async fn get_block(&self, height: u64) -> GetBlockResponse {
         let request = json!({
             "jsonrpc": "2.0",
             "id": 0,
@@ -103,36 +95,38 @@ impl RpcClient {
             "params": {"height": height, "fill_pow_hash": true}
         });
 
-        let rpc_url = format!("{}/json_rpc", self.rpc_url);
-
-        tokio::task::spawn(self.client.get(rpc_url).json(&request).send())
+        self.client
+            .get(&self.json_rpc_url)
+            .json(&request)
+            .send()
             .await
             .unwrap()
-            .unwrap()
             .json::<JsonRpcResponse>()
             .await
             .unwrap()
             .result
     }
 
-    async fn test<const RANDOMX: bool, const CRYPTONIGHT_V0: bool>(
-        &self,
-        range: Range<usize>,
-        hash: impl Fn(Vec<u8>, u64, u64, [u8; 32]) -> [u8; 32] + Send + Sync + 'static + Copy,
-        name: &'static str,
-    ) {
-        let tasks = range.map(|height| {
-            let task = self.get_block(height);
-            (height, task)
-        });
+    pub(crate) async fn test(self, top_height: u64, tx: Sender<VerifyData>) {
+        use futures::StreamExt;
 
-        for (height, task) in tasks {
-            let result = task.await;
+        let iter = (0..top_height).map(|height| {
+            let this = &self;
+            let tx = tx.clone();
 
-            let (seed_height, seed_hash) = if RANDOMX {
-                let seed_height = cuprate_consensus_rules::blocks::randomx_seed_height(height);
+            async move {
+                let get_block_response = this.get_block(height).await;
 
-                let seed_hash: [u8; 32] = self
+                let (seed_height, seed_hash) = if height < RANDOMX_START_HEIGHT {
+                    (0, [0; 32])
+                } else {
+                    let seed_height = cuprate_consensus_rules::blocks::randomx_seed_height(
+                        height.try_into().unwrap(),
+                    )
+                    .try_into()
+                    .unwrap();
+
+                    let seed_hash = this
                         .get_block(seed_height)
                         .await
                         .block_header
@@ -141,122 +135,22 @@ impl RpcClient {
                         .unwrap();
 
                     (seed_height, seed_hash)
-            } else {
-                (0, [0; 32])
                 };
 
-            let top_height = self.top_height;
-
-            #[expect(clippy::cast_precision_loss)]
-            rayon::spawn(move || {
-                let GetBlockResponse { blob, block_header } = result;
-                let header = block_header;
-
-                let block = match Block::read(&mut blob.as_slice()) {
-                    Ok(b) => b,
-                    Err(e) => panic!("{e:?}\nblob: {blob:?}, header: {header:?}"),
-                };
-
-                let pow_hash = if CRYPTONIGHT_V0 && height == 202612 {
-                    hex!("84f64766475d51837ac9efbef1926486e58563c95a19fef4aec3254f03000000")
-                } else {
-                    hash(
-                        block.serialize_pow_hash(),
-                        height.try_into().unwrap(),
-                        seed_height.try_into().unwrap(),
+                let data = VerifyData {
+                    get_block_response,
+                    height,
+                    seed_height,
                     seed_hash,
-                    )
                 };
 
-                assert_eq!(
-                    header.pow_hash, pow_hash,
-                    "\nheight: {height}\nheader: {header:#?}\nblock: {block:#?}"
-                );
-
-                let count = TESTED_BLOCK_COUNT.fetch_add(1, Ordering::Release) + 1;
-
-                if std::env::var("VERBOSE").is_err() && count % 500 != 0 {
-                    return;
+                tx.send(data).unwrap();
             }
-
-                let hash = hex::encode(pow_hash);
-                let percent = (count as f64 / top_height as f64) * 100.0;
-
-                println!(
-                    "progress | {count}/{top_height} ({percent:.2}%)
-height   | {height}
-algo     | {name}
-hash     | {hash}\n"
-                );
-            });
-        }
-    }
-
-    #[named]
-    pub(crate) async fn cryptonight_v0(&self) {
-        self.test::<false, true>(
-            0..1546000,
-            |b, _, _, _| cuprate_cryptonight::cryptonight_hash_v0(&b),
-            function_name!(),
-        )
-        .await;
-    }
-
-    #[named]
-    pub(crate) async fn cryptonight_v1(&self) {
-        self.test::<false, false>(
-            1546000..1685555,
-            |b, _, _, _| cuprate_cryptonight::cryptonight_hash_v1(&b).unwrap(),
-            function_name!(),
-        )
-        .await;
-    }
-
-    #[named]
-    pub(crate) async fn cryptonight_v2(&self) {
-        self.test::<false, false>(
-            1685555..1788000,
-            |b, _, _, _| cuprate_cryptonight::cryptonight_hash_v2(&b),
-            function_name!(),
-        )
-        .await;
-    }
-
-    #[named]
-    pub(crate) async fn cryptonight_r(&self) {
-        self.test::<false, false>(
-            1788000..1978433,
-            |b, h, _, _| cuprate_cryptonight::cryptonight_hash_r(&b, h),
-            function_name!(),
-        )
-        .await;
-    }
-
-    #[named]
-    pub(crate) async fn randomx(&self) {
-        #[expect(clippy::significant_drop_tightening)]
-        let function = move |bytes: Vec<u8>, _, seed_height, seed_hash: [u8; 32]| {
-            static RANDOMX_VM: ThreadLocal<Mutex<BTreeMap<u64, RandomXVM>>> = ThreadLocal::new();
-
-            let mut thread_local = RANDOMX_VM
-                .get_or(|| Mutex::new(BTreeMap::new()))
-                .lock()
-                .unwrap();
-
-            let randomx_vm = thread_local.entry(seed_height).or_insert_with(|| {
-                let flag = RandomXFlag::get_recommended_flags();
-                let cache = RandomXCache::new(flag, &seed_hash).unwrap();
-                RandomXVM::new(flag, Some(cache), None).unwrap()
         });
 
-            randomx_vm
-                .calculate_hash(&bytes)
-                .unwrap()
-                .try_into()
-                .unwrap()
-        };
-
-        self.test::<true, false>(1978433..self.top_height, function, function_name!())
+        futures::stream::iter(iter)
+            .buffer_unordered(4) // This can't be too high or else we get bottlenecked by `monerod`
+            .for_each(|()| async {})
             .await;
     }
 }

tests/pow/src/verify.rs

@@ -0,0 +1,105 @@
+use std::{sync::atomic::Ordering, time::Instant};
+
+use crossbeam::channel::Receiver;
+use monero_serai::block::Block;
+
+use crate::{
+    cryptonight::CryptoNightHash, rpc::GetBlockResponse, VerifyData, RANDOMX_START_HEIGHT,
+    TESTED_BLOCK_COUNT,
+};
+
+#[expect(
+    clippy::needless_pass_by_value,
+    clippy::cast_precision_loss,
+    clippy::cast_possible_truncation,
+    clippy::cast_sign_loss
+)]
+pub(crate) fn spawn_verify_pool(thread_count: usize, top_height: u64, rx: Receiver<VerifyData>) {
+    let now = Instant::now();
+
+    for i in 0..thread_count {
+        let rx = rx.clone();
+
+        std::thread::spawn(move || {
+            let mut current_seed_hash = [0; 32];
+            let mut randomx_vm = None;
+
+            loop {
+                let Ok(data) = rx.recv() else {
+                    println!("Exiting verify thread {i}/{thread_count}");
+                    return;
+                };
+
+                let VerifyData {
+                    get_block_response,
+                    height,
+                    seed_height,
+                    seed_hash,
+                } = data;
+
+                let GetBlockResponse { blob, block_header } = get_block_response;
+                let header = block_header;
+
+                let block = match Block::read(&mut blob.as_slice()) {
+                    Ok(b) => b,
+                    Err(e) => panic!("{e:?}\nblob: {blob:?}, header: {header:?}"),
+                };
+
+                let pow_data = block.serialize_pow_hash();
+
+                let (algo, pow_hash) = if height < RANDOMX_START_HEIGHT {
+                    CryptoNightHash::hash(&pow_data, height)
+                } else {
+                    if current_seed_hash != seed_hash {
+                        randomx_vm = None;
+                    }
+
+                    let randomx_vm = randomx_vm.get_or_insert_with(|| {
+                        current_seed_hash = seed_hash;
+                        // crate::randomx::randomx_vm_optimized(&seed_hash)
+                        crate::randomx::randomx_vm_default(&seed_hash)
+                    });
+
+                    let pow_hash = randomx_vm
+                        .calculate_hash(&pow_data)
+                        .unwrap()
+                        .try_into()
+                        .unwrap();
+
+                    ("randomx", pow_hash)
+                };
+
+                assert_eq!(
+                    header.pow_hash, pow_hash,
+                    "\nheight: {height}\nheader: {header:#?}\nblock: {block:#?}",
+                );
+
+                let count = TESTED_BLOCK_COUNT.fetch_add(1, Ordering::Release) + 1;
+
+                if std::env::var("VERBOSE").is_err() && count % 500 != 0 {
+                    continue;
+                }
+
+                let pow_hash = hex::encode(pow_hash);
+                let seed_hash = hex::encode(seed_hash);
+                let percent = (count as f64 / top_height as f64) * 100.0;
+
+                let elapsed = now.elapsed().as_secs_f64();
+                let secs_per_hash = elapsed / count as f64;
+                let bps = count as f64 / elapsed;
+                let remaining_secs = (top_height as f64 - count as f64) * secs_per_hash;
+                let h = (remaining_secs / 60.0 / 60.0) as u64;
+                let m = (remaining_secs / 60.0 % 60.0) as u64;
+                let s = (remaining_secs % 60.0) as u64;
+
+                println!(
+                    "progress    | {count}/{top_height} ({percent:.2}%, {bps:.2} blocks/sec, {h}h {m}m {s}s left)
+algo        | {algo}
+seed_height | {seed_height}
+seed_hash   | {seed_hash}
+pow_hash    | {pow_hash}\n"
+                );
+            }
+        });
+    }
+}