From 01cc80769c291fc80f5b1e9173b7b580ae6b6413 Mon Sep 17 00:00:00 2001
From: guanqun <guanqunlu@outlook.com>
Date: Tue, 1 Jun 2021 22:36:02 +0800
Subject: [PATCH] feat: make I256::from_raw() as const (#305)

* feat: make I256::from_raw() as const

* misc: fix 'cargo fmt' issue
---
 ethers-core/src/types/i256.rs | 5 ++++-
 ethers/examples/sign.rs       | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/ethers-core/src/types/i256.rs b/ethers-core/src/types/i256.rs
index 8dba6ead..cbfc3044 100644
--- a/ethers-core/src/types/i256.rs
+++ b/ethers-core/src/types/i256.rs
@@ -168,7 +168,7 @@ impl I256 {
     /// Coerces an unsigned integer into a signed one. If the unsigned integer
     /// is greater than the greater than or equal to `1 << 255`, then the result
     /// will overflow into a negative value.
-    pub fn from_raw(raw: U256) -> Self {
+    pub const fn from_raw(raw: U256) -> Self {
         I256(raw)
     }
 
@@ -1263,6 +1263,9 @@ mod tests {
 
     #[test]
     fn identities() {
+        const ONE: I256 = I256::from_raw(U256([1, 0, 0, 0]));
+        assert_eq!(ONE, I256::one());
+
         assert_eq!(I256::zero().to_string(), "0");
         assert_eq!(I256::one().to_string(), "1");
         assert_eq!(I256::minus_one().to_string(), "-1");
diff --git a/ethers/examples/sign.rs b/ethers/examples/sign.rs
index 1ad1a649..a385b048 100644
--- a/ethers/examples/sign.rs
+++ b/ethers/examples/sign.rs
@@ -10,7 +10,7 @@ use ethers_signers::{LocalWallet, Signer};
 async fn main() -> Result<()> {
     // Generate a random wallet
     let wallet = LocalWallet::new(&mut thread_rng());
-    
+
     // Declare the message you want to sign.
     let message = "Some data";