Adding sha256

Cargo.lock

@@ -219,6 +219,17 @@ dependencies = [
  "rand 0.8.5",
 ]
 
+[[package]]
+name = "async-trait"
+version = "0.1.80"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c6fa2087f2753a7da8cc1c0dbfcf89579dd57458e36769de5ac750b4671737ca"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.66",
+]
+
 [[package]]
 name = "auto_ops"
 version = "0.3.0"
@@ -2103,6 +2114,19 @@ dependencies = [
  "digest 0.10.7",
 ]
 
+[[package]]
+name = "sha256"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18278f6a914fa3070aa316493f7d2ddfb9ac86ebc06fa3b83bffda487e9065b0"
+dependencies = [
+ "async-trait",
+ "bytes",
+ "hex",
+ "sha2 0.10.8",
+ "tokio",
+]
+
 [[package]]
 name = "sha3"
 version = "0.10.8"
@@ -2124,6 +2148,7 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_with 3.8.1",
+ "sha256",
  "tokio",
  "websockets",
 ]

side-node/Cargo.toml

@@ -14,6 +14,7 @@ clap = { version = "4.5.4", features = ["derive"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0.117"
 serde_with = "3.8.1"
+sha256 = "1.5.0"
 tokio = { version = "1.37.0", features = ["time"] }
 websockets = "0.3.0"