Remove soft cancellation

crates/driver/example.toml

@@ -26,7 +26,6 @@ url = "https://your.custom.rpc.endpoint"
 name = "custom_name"
 max-additional-tip = "5000000000"
 additional-tip-percentage = 0.05
-use-soft-cancellations = false
 mines-reverting-txs = true
 
 [contracts] # Optionally override the contract addresses, necessary on less popular blockchains

crates/driver/src/infra/config/file/load.rs

@@ -342,7 +342,6 @@ pub async fn load(chain: Chain, path: &Path) -> infra::Config {
                 },
                 max_additional_tip: mempool.max_additional_tip,
                 additional_tip_percentage: mempool.additional_tip_percentage,
-                use_soft_cancellations: mempool.use_soft_cancellations,
             })
             .collect(),
         simulator: match (config.tenderly, config.enso) {

crates/driver/src/infra/config/file/mod.rs

@@ -162,13 +162,6 @@ struct Mempool {
     /// floating point value between 0 and 1.
     #[serde(default = "default_additional_tip_percentage")]
     additional_tip_percentage: f64,
-    /// Configures whether the submission logic is allowed to assume the
-    /// submission nodes implement soft cancellations. With soft
-    /// cancellations a cancellation transaction doesn't have to get mined
-    /// to have an effect. On arrival in the node all pending transactions
-    /// with the same sender and nonce will get discarded immediately.
-    #[serde(default = "default_soft_cancellations_flag")]
-    use_soft_cancellations: bool,
     /// Informs the submission logic whether a reverting transaction will
     /// actually be mined or just ignored. This is an advanced feature
     /// for private mempools so for most configured mempools you have to
@@ -226,10 +219,6 @@ fn default_max_additional_tip() -> eth::U256 {
     eth::U256::from(3) * eth::U256::from(10).pow(eth::U256::from(9))
 }
 
-fn default_soft_cancellations_flag() -> bool {
-    false
-}
-
 fn default_mines_reverting_txs() -> bool {
     true
 }

crates/driver/src/infra/mempool/mod.rs

@@ -22,7 +22,6 @@ pub struct Config {
     /// web3 lib's default behavior, which is `latest`.
     pub nonce_block_number: Option<web3::types::BlockNumber>,
     pub url: reqwest::Url,
-    pub use_soft_cancellations: bool,
     pub name: String,
     pub revert_protection: RevertProtection,
     pub max_additional_tip: eth::U256,

crates/driver/src/tests/setup/solver.rs

@@ -462,7 +462,6 @@ impl Solver {
                     additional_tip_percentage: 0.,
                     revert_protection: infra::mempool::RevertProtection::Disabled,
                     nonce_block_number: None,
-                    use_soft_cancellations: false,
                     url: config.blockchain.web3_url.parse().unwrap(),
                 }],
             )