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feat(p2p): Introduce a p2p crate
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refcell committed Aug 25, 2024
1 parent 5bad826 commit 73f8e33
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8 changes: 8 additions & 0 deletions Cargo.lock

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1 change: 1 addition & 0 deletions Cargo.toml
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Expand Up @@ -11,6 +11,7 @@ categories = ["cryptography", "cryptography::cryptocurrencies"]
[workspace]
members = [
"bin/hera",
"crates/p2p",
"crates/kona-providers",
"crates/ser",
]
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16 changes: 16 additions & 0 deletions crates/p2p/Cargo.toml
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[package]
name = "p2p"
description = "Consensus P2P Stack for L2"
version = "0.0.0"
edition.workspace = true
authors.workspace = true
license.workspace = true
keywords.workspace = true
repository.workspace = true
categories.workspace = true
rust-version.workspace = true

[dependencies]
alloy.workspace = true

kona-primitives = { git = "https://github.com/ethereum-optimism/kona", default-features = true }
10 changes: 10 additions & 0 deletions crates/p2p/src/lib.rs
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//! Consensus P2P Stack

#![doc(issue_tracker_base_url = "https://github.com/paradigmxyz/op-rs/issues/")]
#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
#![cfg_attr(not(test), warn(unused_crate_dependencies))]
#![cfg_attr(not(test), no_std)]

extern crate alloc;

pub mod types;
58 changes: 58 additions & 0 deletions crates/p2p/src/types.rs
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//! Types for the P2P network.

use alloc::vec::Vec;
use alloy::primitives::{keccak256, Signature, B256};
use kona_primitives::L2ExecutionPayload;

/// An envelope around the execution payload for L2.
#[derive(Debug)]
pub struct ExecutionPayloadEnvelope {
/// The execution payload.
pub payload: L2ExecutionPayload,
/// A signature for the payload.
pub signature: Signature,
/// The hash of the payload.
pub hash: PayloadHash,
/// The parent beacon block root.
pub parent_beacon_block_root: Option<B256>,
}

/// Represents the Keccak256 hash of the block
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct PayloadHash(B256);

impl From<&[u8]> for PayloadHash {
/// Returns the Keccak256 hash of a sequence of bytes
fn from(value: &[u8]) -> Self {
Self(keccak256(value))
}
}

impl PayloadHash {
/// The expected message that should be signed by the unsafe block signer.
pub fn signature_message(&self, chain_id: u64) -> B256 {
let domain = B256::ZERO;
let chain_id = B256::left_padding_from(&chain_id.to_be_bytes()[..]);
let payload_hash = self.0;

let data: Vec<u8> =
[domain.as_slice(), chain_id.as_slice(), payload_hash.as_slice()].concat();

keccak256(data)
}
}

#[cfg(test)]
mod tests {
use super::*;
use alloy::primitives::b256;

#[test]
fn test_signature_message() {
let inner = b256!("9999999999999999999999999999999999999999999999999999999999999999");
let hash = PayloadHash::from(inner.as_slice());
let chain_id = 10;
let expected = b256!("44a0e2b1aba1aae1771eddae1dcd2ad18a8cdac8891517153f03253e49d3f206");
assert_eq!(hash.signature_message(chain_id), expected);
}
}

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