Adding an example to sign a transaction (#57)

* Adding an example to sign a transaction

* PR feedback

* more pr feedback

* more suitable to use transaction

* one more

README.md

@@ -35,7 +35,7 @@ This repository contains the following examples:
   - [x] [Deploy from contract](./examples/contracts/examples/deploy_from_contract.rs)
   - [x] [Interact with ABI](./examples/contracts/examples/interact_with_abi.rs)
 - [x] Fillers (Middleware)
-  - [x] [Gas estimation filler](./examples/fillers/examples/gas_filler.rs) 
+  - [x] [Gas estimation filler](./examples/fillers/examples/gas_filler.rs)
   - [x] [Nonce management filler](./examples/fillers/examples/nonce_filler.rs)
   - [x] [Recommended fillers](./examples/fillers/examples/recommended_fillers.rs)
   - [x] [Signer management filler](./examples/fillers/examples/signer_filler.rs)
@@ -60,6 +60,7 @@ This repository contains the following examples:
   - [x] [Trace transaction](./examples/transactions/examples/trace_transaction.rs)
   - [x] [Transfer ERC20 token](./examples/transactions/examples/transfer_erc20.rs)
   - [x] [Transfer ETH](./examples/transactions/examples/transfer_eth.rs)
+  - [x] [Signing a transaction](./examples/transactions/examples/transaction_sign.rs)
 - [ ] Wallets
   - [ ] AWS signer
   - [ ] GCP signer
@@ -95,4 +96,4 @@ Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
 Unless you explicitly state otherwise, any contribution intentionally submitted
 for inclusion in these crates by you, as defined in the Apache-2.0 license,
 shall be dual licensed as above, without any additional terms or conditions.
-</sub>
+</sub>

examples/transactions/examples/transaction_sign.rs

@@ -0,0 +1,53 @@
+//! Example of how to create and sign a transaction with EthereumSigner.
+
+use alloy::{
+    network::{eip2718::Encodable2718, EthereumSigner, TransactionBuilder},
+    node_bindings::Anvil,
+    primitives::U256,
+    providers::{Provider, ProviderBuilder},
+    rpc::types::eth::TransactionRequest,
+    signers::wallet::LocalWallet,
+};
+use eyre::Result;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let anvil = Anvil::new().try_spawn()?;
+
+    // Set up signer from the first default Anvil account (Alice).
+    let signer: LocalWallet = anvil.keys()[0].clone().into();
+
+    // Create two users, Alice and Bob.
+    let alice = anvil.addresses()[0];
+    let bob = anvil.addresses()[1];
+
+    let rpc_url = anvil.endpoint().parse()?;
+    let provider = ProviderBuilder::new().on_http(rpc_url)?;
+
+    // Build a transaction to send 100 wei from Alice to Bob.
+    let tx = TransactionRequest::default()
+        .with_from(alice)
+        .with_to(bob.into())
+        .with_nonce(0)
+        .with_chain_id(anvil.chain_id())
+        .with_value(U256::from(100))
+        .with_gas_limit(21_000)
+        .with_max_priority_fee_per_gas(1_000_000_000)
+        .with_max_fee_per_gas(20_000_000_000);
+
+    // Build the transaction using the EthereumSigner with the provided signer.
+    let to_send = tx.build(&EthereumSigner::from(signer)).await?;
+
+    // Encode the transaction using EIP-2718 encoding.
+    let out = to_send.encoded_2718();
+
+    // Send the raw transaction and retrieve the transaction receipt.
+    let receipt = provider.send_raw_transaction(&out).await?.get_receipt().await?;
+
+    println!("Send transaction receipt: {receipt:?}");
+
+    assert_eq!(receipt.from, alice);
+    assert_eq!(receipt.to, Some(bob));
+
+    Ok(())
+}