From ca4ce4f15dce75209227c43c77d45566daa91f19 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mart=C3=ADn?= <martin.berguer@gmail.com>
Date: Fri, 19 Apr 2024 18:32:15 -0300
Subject: [PATCH] Adding an example to sign a transaction

---
 .../transactions/examples/transfer_sign.rs    | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 examples/transactions/examples/transfer_sign.rs

diff --git a/examples/transactions/examples/transfer_sign.rs b/examples/transactions/examples/transfer_sign.rs
new file mode 100644
index 00000000..648c64b9
--- /dev/null
+++ b/examples/transactions/examples/transfer_sign.rs
@@ -0,0 +1,42 @@
+use alloy::network::{eip2718::Encodable2718, TransactionBuilder};
+use alloy::primitives::utils::parse_units;
+use alloy::providers::Provider;
+use alloy::{
+    network::EthereumSigner, node_bindings::Anvil, primitives::U256, providers::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();
+    let destination: LocalWallet = anvil.keys()[1].clone().into();
+
+    let rpc_url = anvil.endpoint().parse()?;
+    let provider = ProviderBuilder::new().on_http(rpc_url)?;
+
+    let tx = TransactionRequest {
+        from: Some(signer.address()),
+        to: Some(destination.address()),
+        nonce: Some(provider.get_transaction_count(signer.address(), 0.into()).await?),
+        chain_id: Some(provider.get_chain_id().await?),
+        value: Some(U256::from(42)),
+        gas: Some(21000),
+        max_priority_fee_per_gas: Some(parse_units("0.1", "gwei").unwrap().get_absolute().to()),
+        max_fee_per_gas: Some(parse_units("30", "gwei").unwrap().get_absolute().to()),
+        ..Default::default()
+    };
+
+    let to_send = tx.build(&EthereumSigner::from(signer)).await?;
+
+    let out = to_send.encoded_2718();
+
+    let receipt = provider.send_raw_transaction(&out).await?.get_receipt().await?;
+
+    println!("Send transaction receipt: {receipt:?}");
+
+    Ok(())
+}