From df3e332b0315de45e40114f3ed8b05d859ee0cd9 Mon Sep 17 00:00:00 2001
From: EthanYuan <yuanchengxing@hotmail.com>
Date: Mon, 28 Aug 2023 18:16:49 +0800
Subject: [PATCH] Implemented a workaround to bypass the
 [issue](https://github.com/rust-lang/cargo/issues/8170).

---
 util/hash/Cargo.toml | 15 +++++++++------
 util/hash/src/lib.rs |  3 +++
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/util/hash/Cargo.toml b/util/hash/Cargo.toml
index 53d79c81d4e..c14d15c903e 100644
--- a/util/hash/Cargo.toml
+++ b/util/hash/Cargo.toml
@@ -9,11 +9,14 @@ homepage = "https://github.com/nervosnetwork/ckb"
 repository = "https://github.com/nervosnetwork/ckb"
 
 [features]
-default = []
-ckb-contract = [] # This feature is used for CKB contract development
+default = ["blake2b"]
+ckb-contract = ["blake2b-ref"] # This feature is used for CKB contract development
 
-[target.'cfg(not(any(target_arch = "wasm32", features = "ckb-contract")))'.dependencies]
-blake2b = { package = "blake2b-rs", version = "0.2" }
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+blake2b = { package = "blake2b-rs", version = "0.2", optional = true }
 
-[target.'cfg(any(target_arch = "wasm32", features = "ckb-contract"))'.dependencies]
-blake2b = { package = "blake2b-ref", version = "0.2.0" }
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+blake2b = { package = "blake2b-ref", version = "0.2.0", optional = true }
+
+[dependencies]
+blake2b-ref = { version = "0.2.0", optional = true }
\ No newline at end of file
diff --git a/util/hash/src/lib.rs b/util/hash/src/lib.rs
index 5debb844e18..651e3168bb4 100644
--- a/util/hash/src/lib.rs
+++ b/util/hash/src/lib.rs
@@ -9,7 +9,10 @@
 
 #![no_std]
 
+#[cfg(feature = "default")]
 pub use blake2b::{Blake2b, Blake2bBuilder};
+#[cfg(feature = "ckb-contract")]
+pub use blake2b_ref::{Blake2b, Blake2bBuilder};
 
 #[doc(hidden)]
 pub const BLAKE2B_KEY: &[u8] = &[];