move Accounts::hash_message and make it static

tomusdrw · Jan 18, 2022 · a2a71d0 · a2a71d0
1 parent 81c41ae
commit a2a71d0
Show file tree

Hide file tree

Showing 2 changed files with 21 additions and 9 deletions.
diff --git a/src/api/accounts.rs b/src/api/accounts.rs
@@ -1,7 +1,7 @@
 //! Partial implementation of the `Accounts` namespace.
 
 use crate::{
-    api::Namespace,
+    api::{hash_message, Namespace},
     signing,
     types::{AccessList, H256, U64},
     Transport,
@@ -36,12 +36,7 @@ impl<T: Transport> Accounts<T> {
     where
         S: AsRef<[u8]>,
     {
-        let message = message.as_ref();
-
-        let mut eth_message = format!("\x19Ethereum Signed Message:\n{}", message.len()).into_bytes();
-        eth_message.extend_from_slice(message);
-
-        signing::keccak256(&eth_message).into()
+        hash_message(message)
     }
 }
 

diff --git a/src/api/mod.rs b/src/api/mod.rs
@@ -29,8 +29,8 @@ pub use self::{
 };
 
 use crate::{
-    confirm, error,
-    types::{Bytes, TransactionReceipt, TransactionRequest, U64},
+    confirm, error, signing,
+    types::{Bytes, TransactionReceipt, TransactionRequest, U64, H256},
     DuplexTransport, Transport,
 };
 use futures::Future;
@@ -163,3 +163,20 @@ impl<T: DuplexTransport> Web3<T> {
         self.api()
     }
 }
+
+/// Hash a message according to EIP-191.
+///
+/// The data is a UTF-8 encoded string and will enveloped as follows:
+/// `"\x19Ethereum Signed Message:\n" + message.length + message` and hashed
+/// using keccak256.
+pub fn hash_message<S>(message: S) -> H256
+    where
+        S: AsRef<[u8]>,
+{
+    let message = message.as_ref();
+
+    let mut eth_message = format!("\x19Ethereum Signed Message:\n{}", message.len()).into_bytes();
+    eth_message.extend_from_slice(message);
+
+    signing::keccak256(&eth_message).into()
+}