Add support for getting the gas limit from the node

crates/node/src/geth.rs

@@ -14,6 +14,7 @@ use std::{
 };
 
 use alloy::{
+    eips::BlockNumberOrTag,
     network::{Ethereum, EthereumWallet},
     primitives::Address,
     providers::{
@@ -360,6 +361,19 @@ impl EthereumNode for Instance {
             provider.await?.get_chain_id().await.map_err(Into::into)
         })?
     }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn gas_limit(&self) -> anyhow::Result<u128> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            provider
+                .await?
+                .get_block_by_number(BlockNumberOrTag::Latest)
+                .await?
+                .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+                .map(|block| block.header.gas_limit as _)
+        })?
+    }
 }
 
 impl Node for Instance {
@@ -502,4 +516,17 @@ mod tests {
         let chain_id = chain_id.expect("Failed to get the chain id");
         assert_eq!(chain_id, 420_420_420);
     }
+
+    #[test]
+    fn can_get_gas_limit_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let gas_limit = node.gas_limit();
+
+        // Assert
+        let gas_limit = gas_limit.expect("Failed to get the gas limit");
+        assert_eq!(gas_limit, u32::MAX as u128)
+    }
 }

crates/node/src/kitchensink.rs

@@ -13,6 +13,7 @@ use std::{
 
 use alloy::{
     consensus::{BlockHeader, TxEnvelope},
+    eips::BlockNumberOrTag,
     hex,
     network::{
         Ethereum, EthereumWallet, Network, TransactionBuilder, TransactionBuilderError,
@@ -436,6 +437,19 @@ impl EthereumNode for KitchensinkNode {
             provider.await?.get_chain_id().await.map_err(Into::into)
         })?
     }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn gas_limit(&self) -> anyhow::Result<u128> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            provider
+                .await?
+                .get_block_by_number(BlockNumberOrTag::Latest)
+                .await?
+                .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+                .map(|block| block.header.gas_limit)
+        })?
+    }
 }
 
 impl Node for KitchensinkNode {
@@ -1175,4 +1189,17 @@ mod tests {
         let chain_id = chain_id.expect("Failed to get the chain id");
         assert_eq!(chain_id, 420_420_420);
     }
+
+    #[test]
+    fn can_get_gas_limit_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let gas_limit = node.gas_limit();
+
+        // Assert
+        let gas_limit = gas_limit.expect("Failed to get the gas limit");
+        assert_eq!(gas_limit, 52430300000000000000)
+    }
 }