Seth: keccak

dapptools/src/seth.rs

@@ -90,7 +90,9 @@ async fn main() -> eyre::Result<()> {
             let provider = Provider::try_from(rpc_url)?;
             println!("{}", Seth::new(provider).base_fee(block.unwrap_or(BlockId::Number(Latest))).await?);
         }
-
+        Subcommands::Keccak { data } => {
+            println!("{}", SimpleSeth::keccak(&data));
+        }
         Subcommands::ResolveName {
             who,
             rpc_url,

dapptools/src/seth_opts.rs

@@ -104,6 +104,9 @@ pub enum Subcommands {
         #[structopt(short, long, env = "ETH_RPC_URL")]
         rpc_url: String,
     },
+    #[structopt(name = "keccak")]
+    #[structopt(about = "Keccak-256 hash arbitrary data")]
+    Keccak { data: String },
     #[structopt(name = "resolve-name")]
     #[structopt(about = "Returns the address the provided ENS name resolves to")]
     ResolveName {

seth/src/lib.rs

@@ -344,6 +344,19 @@ impl SimpleSeth {
         Ok(format!("{:?}", H256::from_str(&padded)?))
     }
 
+    /// Keccak-256 hashes arbitrary data
+    ///
+    /// ```
+    /// use seth::SimpleSeth as Seth;
+    ///
+    /// assert_eq!(Seth::keccak("foo"), "0x41b1a0649752af1b28b3dc29a1556eee781e4a4c3a1f7f53f90fa834de098c4d");
+    /// assert_eq!(Seth::keccak("123abc"), "0xb1f1c74a1ba56f07a892ea1110a39349d40f66ca01d245e704621033cb7046a4");
+    /// ```
+    pub fn keccak(d: &str) -> String {
+        let hash: String = keccak256(d.as_bytes()).to_hex();
+        format!("0x{}", hash)
+    }
+
     /// Converts ENS names to their namehash representation
     /// [Namehash reference](https://docs.ens.domains/contract-api-reference/name-processing#hashing-names)
     /// [namehash-rust reference](https://github.com/InstateDev/namehash-rust/blob/master/src/lib.rs)