chore: reexport sha3 from primitives (#109)

* chore: reexport sha3 from primitives

* feat: add keccak256

* replace sha3 with tinykeccak

crates/primitives/Cargo.toml

@@ -8,19 +8,24 @@ readme = "README.md"
 description = "Commonly used types in reth."
 
 [dependencies]
-ethers-core = { git = "https://github.com/gakonst/ethers-rs", default-features = false }
-bytes = "1.2"
-
-serde = "1.0"
-thiserror = "1"
+# reth
 reth-rlp = { path = "../common/rlp", features = ["std", "derive", "ethereum-types"]}
-parity-scale-codec = { version = "3.2.1", features = ["derive", "bytes"] }
 reth-codecs = { version = "0.1.0", path = "../codecs" }
 
+# ethereum
+ethers-core = { git = "https://github.com/gakonst/ethers-rs", default-features = false }
+parity-scale-codec = { version = "3.2.1", features = ["derive", "bytes"] }
+tiny-keccak = "0.3"
+
 #used for forkid
 crc = "1"
 maplit = "1"
 
+# misc
+bytes = "1.2"
+serde = "1.0"
+thiserror = "1"
+
 [dev-dependencies]
 serde_json = "1.0"
 hex-literal = "0.3"

crates/primitives/src/lib.rs

@@ -49,3 +49,18 @@ pub use ethers_core::{
     types as rpc,
     types::{Bloom, Bytes, H128, H160, H256, H512, H64, U128, U256, U64},
 };
+
+#[doc(hidden)]
+mod __reexport {
+    pub use tiny_keccak;
+}
+
+// Useful reexports
+pub use __reexport::*;
+
+/// Returns the keccak256 hash for the given data.
+pub fn keccak256(data: impl AsRef<[u8]>) -> H256 {
+    let mut res: [u8; 32] = [0; 32];
+    tiny_keccak::keccak_256(data.as_ref(), &mut res);
+    res.into()
+}