Feature/sma 54 max factor upper bound is hardcoded

src/node-control/README.md

@@ -518,7 +518,7 @@ nodectl config elections tick-interval 60
 
 ##### `config elections max-factor`
 
-Set the maximum factor for elections. Must be in the range [1.0..3.0].
+Set the maximum stake factor for elections. The value must be between **1.0** and the network’s **maximum stake factor** from masterchain **config param 17** (`max_stake_factor`). nodectl does not use a hardcoded upper bound (e.g. 3.0): the CLI reads the current limit from the chain when validating and saving.
 
 | Argument | Description |
 |----------|-------------|
@@ -1403,7 +1403,7 @@ Automatic elections task configuration:
   - `"minimum"` — use minimum required stake
   - `{ "fixed": <amount> }` — fixed stake amount in nanoTON
 - `policy_overrides` — per-node stake policy overrides (node name -> policy). When a node has an entry here, it takes precedence over the default `policy`. Example: `{ "node0": { "fixed": 500000000000 } }`
-- `max_factor` — max factor for elections (default: 3.0, must be in range [1.0..3.0])
+- `max_factor` — maximum stake factor (default `3.0` in generated configs). Valid values lie in `[1.0, network_max_factor]`, where **`network_max_factor` comes from masterchain config param 17** (`max_stake_factor`); the CLI and stake command validate against the live network when TON HTTP API is available
 - `tick_interval` — interval between election checks in seconds (default: `40`)
 
 #### `voting` (optional)
@@ -1720,7 +1720,7 @@ nodectl config wallet stake -b <BINDING> -a <AMOUNT> [-m <MAX_FACTOR>]
 |------|------|----------|---------|-------------|
 | `-b` | `--binding` | Yes | — | Binding name (node-wallet-pool triple) |
 | `-a` | `--amount` | Yes | — | Stake amount in TON |
-| `-m` | `--max-factor` | No | `3.0` | Max factor (`1.0`–`3.0`) |
+| `-m` | `--max-factor` | No | `3.0` | Max factor: from `1.0` up to the network limit (**config param 17**), validated against the chain |
 
 Example:
 

src/node-control/commands/src/commands/nodectl/config_elections_cmd.rs

@@ -6,7 +6,10 @@
  *
  * This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND.
  */
-use crate::commands::nodectl::{output_format::OutputFormat, utils::save_config};
+use crate::commands::nodectl::{
+    output_format::OutputFormat,
+    utils::{fetch_network_max_factor, save_config, try_create_rpc_client},
+};
 use colored::Colorize;
 use common::{
     app_config::{AppConfig, BindingStatus, ElectionsConfig, StakePolicy},
@@ -71,7 +74,9 @@ pub struct TickIntervalCmd {
 
 #[derive(clap::Args, Clone)]
 pub struct MaxFactorCmd {
-    #[arg(help = "Max factor (1.0..3.0)")]
+    #[arg(
+        help = "Max factor: from 1.0 up to the network limit (config param 17 max_stake_factor)"
+    )]
     value: f32,
 }
 
@@ -220,10 +225,18 @@ impl TickIntervalCmd {
 
 impl MaxFactorCmd {
     pub async fn run(&self, path: &Path) -> anyhow::Result<()> {
-        if !(1.0..=3.0).contains(&self.value) {
-            anyhow::bail!("max-factor must be in range [1.0..3.0]");
-        }
         let mut config = AppConfig::load(path)?;
+        config.elections.as_ref().ok_or_else(|| anyhow::anyhow!("Elections are not configured"))?;
+
+        let rpc_client = try_create_rpc_client(&config).await?;
+        let network_max_factor = fetch_network_max_factor(&rpc_client).await?;
+        if !(1.0..=network_max_factor).contains(&self.value) {
+            anyhow::bail!(
+                "max-factor must be in range [1.0..{}] (network max_stake_factor from config param 17)",
+                network_max_factor
+            );
+        }
+
         config
             .elections
             .as_mut()

src/node-control/commands/src/commands/nodectl/config_wallet_cmd.rs

@@ -9,10 +9,10 @@
 use crate::commands::nodectl::{
     output_format::OutputFormat,
     utils::{
-        MASTER_WALLET_RESERVED_NAME, SEND_TIMEOUT, check_ton_api_connection, get_wallet_config,
-        load_config_vault, load_config_vault_rpc_client, make_wallet, save_config,
-        wait_for_seqno_change, wallet_address, wallet_info, warn_missing_secret,
-        warn_ton_api_unavailable,
+        MASTER_WALLET_RESERVED_NAME, SEND_TIMEOUT, check_ton_api_connection,
+        fetch_network_max_factor, get_wallet_config, load_config_vault,
+        load_config_vault_rpc_client, make_wallet, save_config, wait_for_seqno_change,
+        wallet_address, wallet_info, warn_missing_secret, warn_ton_api_unavailable,
     },
 };
 use anyhow::Context;
@@ -121,7 +121,12 @@ pub struct WalletStakeCmd {
     binding: String,
     #[arg(short = 'a', long = "amount", help = "Stake amount in TONs")]
     amount: f64,
-    #[arg(short = 'm', long = "max-factor", default_value = "3.0", help = "Max factor (1.0..3.0)")]
+    #[arg(
+        short = 'm',
+        long = "max-factor",
+        default_value = "3.0",
+        help = "Max factor from 1.0 up to the network limit (config param 17)"
+    )]
     max_factor: f32,
 }
 
@@ -435,11 +440,14 @@ impl WalletSendCmd {
 
 impl WalletStakeCmd {
     pub async fn run(&self, path: &Path, cancellation_ctx: CancellationCtx) -> anyhow::Result<()> {
-        if !(1.0..=3.0).contains(&self.max_factor) {
-            anyhow::bail!("max-factor must be between 1.0 and 3.0");
-        }
-
         let (config, vault, rpc_client) = load_config_vault_rpc_client(path).await?;
+        let network_max_factor = fetch_network_max_factor(&rpc_client).await?;
+        if !(1.0..=network_max_factor).contains(&self.max_factor) {
+            anyhow::bail!(
+                "max-factor must be in range [1.0..{}] (network max_stake_factor from config param 17)",
+                network_max_factor
+            );
+        }
 
         // Resolve binding → wallet, pool, node
         let binding = config

src/node-control/commands/src/commands/nodectl/utils.rs

@@ -11,6 +11,7 @@ use colored::Colorize;
 use common::{
     app_config::{AppConfig, WalletConfig},
     task_cancellation::CancellationCtx,
+    ton_utils::extract_max_factor,
     vault_signer::VaultSigner,
 };
 use contracts::{WalletContract, contract_provider};
@@ -32,6 +33,11 @@ pub const DEPLOY_TIMEOUT: tokio::time::Duration = tokio::time::Duration::from_se
 /// Logical name for the master wallet in CLI, `get_wallet_config`, and `config wallet ls`.
 pub const MASTER_WALLET_RESERVED_NAME: &str = "master_wallet";
 
+/// `max_stake_factor` from masterchain config param 17 as a float multiplier (e.g. `3.0`).
+pub async fn fetch_network_max_factor(rpc_client: &ClientJsonRpc) -> anyhow::Result<f32> {
+    extract_max_factor(rpc_client.get_config_param(17).await?)
+}
+
 pub fn warn_missing_secret(secret_name: &str) {
     println!("\n{} {}", "[WARNING]".yellow().bold(), "Vault secret is missing".yellow(),);
     println!(

src/node-control/common/src/app_config.rs

@@ -506,10 +506,24 @@ impl ElectionsConfig {
         self.policy_overrides.get(node_id).unwrap_or(&self.policy)
     }
 
-    pub fn validate(&self) -> anyhow::Result<()> {
-        if !(1.0..=3.0).contains(&self.max_factor) {
-            anyhow::bail!("max_factor must be in range [1.0..3.0]");
+    /// Validates elections settings.
+    ///
+    /// - `None`: only checks `max_factor >= 1.0` (e.g. [`AppConfig::load`] without RPC). No upper bound.
+    /// - `Some(m)`: `max_factor` must be in `[1.0, m]` where `m` is from config param 17 (service startup).
+    pub fn validate(&self, max_factor_upper_bound: Option<f32>) -> anyhow::Result<()> {
+        self.validate_timing_fields()?;
+        if self.max_factor < 1.0 {
+            anyhow::bail!("max_factor must be >= 1.0");
+        }
+        if let Some(m) = max_factor_upper_bound {
+            if self.max_factor > m {
+                anyhow::bail!("max_factor must be in range [1.0..{}]", m);
+            }
         }
+        Ok(())
+    }
+
+    fn validate_timing_fields(&self) -> anyhow::Result<()> {
         if !(0.0..=1.0).contains(&self.sleep_period_pct) {
             anyhow::bail!("sleep_period_pct must be in range [0.0..1.0]");
         }
@@ -714,7 +728,7 @@ impl AppConfig {
     }
 
     fn validate(&self) -> anyhow::Result<()> {
-        self.elections.as_ref().map(|e| e.validate()).transpose()?;
+        self.elections.as_ref().map(|e| e.validate(None)).transpose()?;
         Ok(())
     }
 }
@@ -756,6 +770,25 @@ mod tests {
         assert_eq!(stake, 10);
     }
 
+    #[test]
+    fn test_elections_validate_max_factor_respects_network_cap() {
+        let mut c = ElectionsConfig::default();
+        c.max_factor = 5.0;
+        assert!(c.validate(Some(default_max_factor())).is_err());
+        assert!(c.validate(Some(5.0)).is_ok());
+        c.max_factor = 2.0;
+        assert!(c.validate(Some(default_max_factor())).is_ok());
+    }
+
+    #[test]
+    fn test_elections_validate_none_allows_max_factor_above_default_cap() {
+        let mut c = ElectionsConfig::default();
+        c.max_factor = 25.0;
+        assert!(c.validate(None).is_ok());
+        assert!(c.validate(Some(3.0)).is_err());
+        assert!(c.validate(Some(30.0)).is_ok());
+    }
+
     #[test]
     fn test_calculate_stake_split50_ok() {
         let policy = StakePolicy::Split50;

src/node-control/common/src/ton_utils.rs

@@ -6,6 +6,8 @@
  *
  * This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND.
  */
+use ton_block::ConfigParamEnum;
+
 pub fn nanotons_to_dec_string(value: u64) -> String {
     value.to_string()
 }
@@ -18,6 +20,25 @@ pub fn nanotons_to_tons_f64(nanotons: u64) -> f64 {
     nanotons as f64 / 1_000_000_000.0
 }
 
+/// Elector uses fixed-point `max_stake_factor`: raw value is multiplier × 65536 (e.g. 3× → `3 * 65536`).
+pub const MAX_STAKE_FACTOR_SCALE: f32 = 65536.0;
+
+/// Converts chain `max_stake_factor` (raw) to float multiplier (e.g. `196608` → `3.0`).
+#[inline]
+pub fn max_stake_factor_raw_to_multiplier(raw: u32) -> f32 {
+    raw as f32 / MAX_STAKE_FACTOR_SCALE
+}
+
+/// Extracts the network `max_factor` from a `ConfigParamEnum` (must be param 17; field `max_stake_factor`) as a float multiplier.
+pub fn extract_max_factor(param: ConfigParamEnum) -> anyhow::Result<f32> {
+    match param {
+        ConfigParamEnum::ConfigParam17(c) => {
+            Ok(max_stake_factor_raw_to_multiplier(c.max_stake_factor))
+        }
+        _ => anyhow::bail!("expected config param 17 (stakes config)"),
+    }
+}
+
 pub fn display_tons(nanotons: u64) -> String {
     format!("{:.4}", nanotons_to_tons_f64(nanotons))
         .trim_end_matches('0')

src/node-control/elections/src/runner.rs

@@ -21,7 +21,10 @@ use common::{
     },
     task_cancellation::CancellationCtx,
     time_format,
-    ton_utils::{display_tons, nanotons_to_dec_string, nanotons_to_tons_f64},
+    ton_utils::{
+        MAX_STAKE_FACTOR_SCALE, display_tons, max_stake_factor_raw_to_multiplier,
+        nanotons_to_dec_string, nanotons_to_tons_f64,
+    },
 };
 use contracts::{
     ElectionsInfo, ElectorWrapper, NominatorWrapper, Participant, TonWallet,
@@ -391,7 +394,11 @@ impl ElectionRunner {
             elections_info.participants.len()
         );
 
-        self.build_elections_snapshot(election_id, &cfg15, &elections_info);
+        // Config param 17: effective `max_factor` in snapshot; 16/17: participation (e.g. AdaptiveSplit50).
+        let cfg16 = self.fetch_config_param_16().await?;
+        let cfg17 = self.fetch_config_param_17().await?;
+
+        self.build_elections_snapshot(election_id, &cfg15, &elections_info, &cfg17);
 
         if elections_info.finished {
             self.snapshot_cache.last_elections_status = ElectionsStatus::Finished;
@@ -436,9 +443,6 @@ impl ElectionRunner {
                 );
             }
         }
-        // Fetch config params 16/17 - used for AdaptiveSplit50 strategy
-        let cfg16 = self.fetch_config_param_16().await?;
-        let cfg17 = self.fetch_config_param_17().await?;
 
         // walk through the nodes and try to participate in the elections
         let mut nodes = self.nodes.keys().cloned().collect::<Vec<String>>();
@@ -491,8 +495,10 @@ impl ElectionRunner {
         election_id: u64,
         cfg15: &ConfigParam15,
         elections_info: &ElectionsInfo,
+        cfg17: &ConfigParam17,
     ) {
-        self.snapshot_cache.last_max_factor = Some(self.calc_max_factor());
+        self.snapshot_cache.last_max_factor =
+            Some(self.calc_max_factor(cfg17.max_stake_factor, false).1);
 
         // It can be a validator wallet or nominator pool address.
         let wallet_addrs: HashSet<Vec<u8>> =
@@ -549,7 +555,7 @@ impl ElectionRunner {
         election_id: u64,
         params: &ConfigParams<'_>,
     ) -> anyhow::Result<()> {
-        let max_factor = (self.calc_max_factor() * 65536.0) as u32;
+        let (max_factor, _) = self.calc_max_factor(params.cfg17.max_stake_factor, true);
         let stake_ctx = StakeContext {
             past_elections: &self.past_elections,
             our_max_factor: max_factor,
@@ -798,9 +804,6 @@ impl ElectionRunner {
                 participant.adnl_addr.as_slice()
             )
         );
-        if !(1.0..=3.0).contains(&(participant.max_factor as f32 / 65536.0)) {
-            anyhow::bail!("<max-factor> must be a real number 1..3");
-        }
         // todo: move to ElectorWrapper
         // validator-elect-req.fif
         let mut data = 0x654C5074u32.to_be_bytes().to_vec();
@@ -923,8 +926,28 @@ impl ElectionRunner {
         tracing::info!("elections: start={}, end={}", elections_start, elections_end);
     }
 
-    fn calc_max_factor(&self) -> f32 {
-        self.default_max_factor
+    /// Resolves elector `max_factor`: fixed-point `raw` for the Elector and `multiplier` for logs/UI.
+    ///
+    /// Applies configured `default_max_factor` and clamps to the chain cap
+    /// (`network_max_stake_factor_raw` from masterchain config param 17), in fixed-point
+    /// `[65536, network_max_stake_factor_raw]` (see [`MAX_STAKE_FACTOR_SCALE`]).
+    ///
+    /// When `warn_if_clamped` is true and the configured value was clamped, logs a warning.
+    fn calc_max_factor(
+        &self,
+        network_max_stake_factor_raw: u32,
+        warn_if_clamped: bool,
+    ) -> (u32, f32) {
+        let configured_raw = (self.default_max_factor * MAX_STAKE_FACTOR_SCALE) as u32;
+        let raw = configured_raw.clamp(MAX_STAKE_FACTOR_SCALE as u32, network_max_stake_factor_raw);
+        if warn_if_clamped && raw != configured_raw {
+            tracing::warn!(
+                "max_factor clamped: configured={}, used={} (network limit from cfg17)",
+                max_stake_factor_raw_to_multiplier(configured_raw),
+                max_stake_factor_raw_to_multiplier(raw),
+            );
+        }
+        (raw, max_stake_factor_raw_to_multiplier(raw))
     }
 
     /// Calculate stake for a node according to the stake policy.

src/node-control/elections/src/runner_tests.rs

@@ -1352,6 +1352,8 @@ async fn test_elections_finished_node_not_in_participants() {
     let provider = &mut harness.provider_mock;
     provider.expect_election_parameters().returning(|| Ok(default_cfg15()));
     provider.expect_validator_config().returning(|| Ok(ValidatorConfig::new()));
+    provider.expect_config_param_16().returning(|| Ok(default_cfg16()));
+    provider.expect_config_param_17().returning(|| Ok(default_cfg17()));
 
     provider.expect_shutdown().returning(|| Ok(()));
 
@@ -2382,7 +2384,7 @@ fn test_elections_config_validate_sleep_gt_waiting() {
         waiting_period_pct: 0.3, // sleep > waiting → invalid
         ..ElectionsConfig::default()
     };
-    assert!(config.validate().is_err());
+    assert!(config.validate(None).is_err());
 }
 
 #[test]
@@ -2391,7 +2393,7 @@ fn test_elections_config_validate_sleep_out_of_range() {
         sleep_period_pct: 1.5, // > 1.0 → invalid
         ..ElectionsConfig::default()
     };
-    assert!(config.validate().is_err());
+    assert!(config.validate(None).is_err());
 }
 
 #[test]
@@ -2401,7 +2403,7 @@ fn test_elections_config_validate_valid() {
         waiting_period_pct: 0.5,
         ..ElectionsConfig::default()
     };
-    assert!(config.validate().is_ok());
+    assert!(config.validate(None).is_ok());
 }
 
 #[test]