feat(transactions): encode eip1559 (#45)

* feat(transactions): encode eip1559

* recover signer

* nit

* improve docs

* rename sign_transaction

---------

Co-authored-by: zerosnacks <[email protected]>

Author: yash-atreya

Cargo.toml

@@ -84,6 +84,7 @@ unnecessary_struct_initialization = "allow"
 alloy = { git = "https://github.com/alloy-rs/alloy", rev = "f6ebef2", features = [
     "consensus",
     "contract",
+    "k256",
     "eips",
     "kzg",
     "network",

README.md

@@ -73,7 +73,7 @@ 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] [Sign and send a raw transaction](./examples/transactions/examples/sign_transaction.rs)
+  - [x] [Sign and send a raw transaction](./examples/transactions/examples/send_raw_transaction.rs)
   - [x] [Send EIP-1559 transaction](./examples/transactions/examples/send_eip1559_transaction.rs)
   - [x] [Send legacy transaction](./examples/transactions/examples/send_legacy_transaction.rs)
   - [x] [Send EIP-4844 transaction](./examples/transactions/examples/send_eip4844_transaction.rs)

examples/transactions/examples/encode_decode_eip1559.rs

@@ -0,0 +1,47 @@
+//! Example showing how to encode and decode an [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559) transaction.
+
+use alloy::{
+    consensus::{SignableTransaction, TxEip1559},
+    eips::eip2930::AccessList,
+    primitives::{address, b256, hex, Signature, TxKind, U256},
+};
+use eyre::Result;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    // EIP1559 transaction: <https://etherscan.io/tx/0x0ec0b6a2df4d87424e5f6ad2a654e27aaeb7dac20ae9e8385cc09087ad532ee0>
+    let tx_hash = b256!("0ec0b6a2df4d87424e5f6ad2a654e27aaeb7dac20ae9e8385cc09087ad532ee0");
+
+    // Signer of the transaction.
+    let signer = address!("DD6B8b3dC6B7AD97db52F08a275FF4483e024CEa");
+
+    // Construct the EIP-1559 transaction.
+    let tx = TxEip1559 {
+        chain_id: 1,
+        nonce: 0x42,
+        gas_limit: 44386,
+        to: TxKind::Call( address!("6069a6c32cf691f5982febae4faf8a6f3ab2f0f6")),
+        value: U256::from(0_u64),
+        input: hex!("a22cb4650000000000000000000000005eee75727d804a2b13038928d36f8b188945a57a0000000000000000000000000000000000000000000000000000000000000000").into(),
+        max_fee_per_gas: 0x4a817c800,
+        max_priority_fee_per_gas: 0x3b9aca00,
+        access_list: AccessList::default(),
+    };
+
+    // Construct the signature of the transaction.
+    let signature = Signature::from_scalars_and_parity(
+        b256!("840cfc572845f5786e702984c2a582528cad4b49b2a10b9db1be7fca90058565"),
+        b256!("25e7109ceb98168d95b09b18bbf6b685130e0562f233877d492b94eee0c5b6d1"),
+        false,
+    )?;
+
+    // Convert the transaction into a signed transaction.
+    let signed_tx = tx.into_signed(signature);
+    assert_eq!(*signed_tx.hash(), tx_hash);
+
+    // Recover the signer from the signed transaction to ensure it matches the expected signer.
+    let recovered_signer = signed_tx.recover_signer()?;
+    assert_eq!(recovered_signer, signer);
+
+    Ok(())
+}