Revert "[Easy] Set max gas_limit for a settlement at 1/2 block gas li…

…mit (#2526)"

This reverts commit 8b6bc89.

crates/driver/src/domain/competition/solution/settlement.rs

@@ -418,21 +418,16 @@ impl Gas {
             eth::U256::from_f64_lossy(eth::U256::to_f64_lossy(estimate.into()) * GAS_LIMIT_FACTOR)
                 .into();
 
-        // We don't allow for solutions to take up more than half of the block's gas
-        // limit. This is to ensure that block producers attempt to include the
-        // settlement transaction in the next block as long as it is reasonably
-        // priced. If we were to allow for solutions very close to the block
-        // gas limit, validators may discard the settlement transaction unless it is
-        // paying a very high priority fee. This is because the default block
-        // building algorithm picks the highest paying transaction whose gas limit
-        // will not exceed the remaining space in the block next and ignore transactions
-        // whose gas limit exceed the remaining space (without simulating the actual
-        // gas required).
-        let max_gas = eth::Gas(block_limit.0 / 2);
+        // The block gas limit may fluctuate between blocks (validators trying to
+        // upvote/downvote the limit), thus add a bit margin to not run into
+        // GasLimitExceeded errors. The maximum deviation per block is 1/1024 so using
+        // 1% buffer will make that even with 10 consecutive blocks in which the gas
+        // limit decreased maximally will not exceed the limit.
+        let block_limit = eth::Gas(block_limit.0 * 99 / 100);
 
         Self {
             estimate,
-            limit: std::cmp::min(max_gas, estimate_with_buffer),
+            limit: std::cmp::min(block_limit, estimate_with_buffer),
             price,
         }
     }