WIP: feat(general) use gas estimation layer

examples/anvil/examples/deploy_contract_anvil.rs

@@ -58,6 +58,7 @@ async fn main() -> Result<()> {
 
     let contract = Counter::new(contract_address, &provider);
 
+    // Set the number to 42.
     let estimate = contract.setNumber(U256::from(42)).estimate_gas().await?;
     let builder = contract.setNumber(U256::from(42)).nonce(1).gas(estimate).gas_price(base_fee);
     let receipt = builder.send().await?.get_receipt().await?;

examples/contracts/examples/deploy_from_artifact.rs

@@ -1,4 +1,4 @@
-//! Example of deploying a contract from an artifact to Anvil and interacting with it.
+//! Example of deploying a contract from Solidity code to Anvil and interacting with it.
 
 use alloy::{
     network::EthereumSigner,
@@ -48,6 +48,7 @@ async fn main() -> Result<()> {
 
     let contract = Counter::new(contract_address, &provider);
 
+    // Set the number to 42.
     let estimate = contract.setNumber(U256::from(42)).estimate_gas().await?;
     let builder = contract.setNumber(U256::from(42)).nonce(1).gas(estimate).gas_price(base_fee);
     let receipt = builder.send().await?.get_receipt().await?;

examples/contracts/examples/deploy_from_contract.rs

@@ -58,6 +58,7 @@ async fn main() -> Result<()> {
 
     let contract = Counter::new(contract_address, &provider);
 
+    // Set the number to 42.
     let estimate = contract.setNumber(U256::from(42)).estimate_gas().await?;
     let builder = contract.setNumber(U256::from(42)).nonce(1).gas(estimate).gas_price(base_fee);
     let receipt = builder.send().await?.get_receipt().await?;

examples/layers/examples/nonce_layer.rs

@@ -4,7 +4,10 @@ use alloy::{
     network::{EthereumSigner, TransactionBuilder},
     node_bindings::Anvil,
     primitives::{address, U256},
-    providers::{layers::ManagedNonceLayer, Provider, ProviderBuilder},
+    providers::{
+        layers::{GasEstimatorLayer, ManagedNonceLayer},
+        Provider, ProviderBuilder,
+    },
     rpc::{client::RpcClient, types::eth::request::TransactionRequest},
     signers::wallet::LocalWallet,
 };
@@ -36,6 +39,7 @@ async fn main() -> Result<()> {
         // It is generally recommended to use the `.with_recommended_layers()` method, which
         // includes the `ManagedNonceLayer`.
         .layer(ManagedNonceLayer)
+        .layer(GasEstimatorLayer)
         .signer(EthereumSigner::from(wallet))
         .on_client(RpcClient::new_http(http));