refactor function selector to litte endian encoding.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ola-lang-abi"
-version = "1.0.0"
+version = "1.0.1"
 edition = "2021"
 license = "MIT"
 description = "Ola Smart Contract ABI parsing library"
@@ -9,6 +9,7 @@ authors = ["yp945@outlook.com"]
 keywords = ["abi", "ola", "olac", ]
 documentation = "https://olang.readthedocs.io/"
 homepage = "https://github.com/Sin7Y/ola-lang-abi"
+exclude = ["/docs",  "/examples"]
 
 [dependencies]
 anyhow = { version = "1.0", default-features = false, features = ["std"] }

examples/book_encode.rs

@@ -5,14 +5,14 @@ use ola_lang_abi::{Abi, Value};
 fn main() {
     // Parse ABI from file
     let abi: Abi = {
-        let file = File::open("examples/BookExample.json").expect("failed to open ABI file");
+        let file = File::open("examples/sqrt_prophet_abi.json").expect("failed to open ABI file");
 
         serde_json::from_reader(file).expect("failed to parse ABI")
     };
 
-    let function_sig = "createBook(u32,string)";
+    let function_sig = "sqrt_benchmark(u32,u32)";
 
-    let params = vec![Value::U32(60), Value::String("olavm".to_string())];
+    let params = vec![Value::U32(60), Value::U32(1)];
 
     let input = abi
         .encode_input_with_signature(function_sig, &params)

examples/sqrt_prophet_abi.json

@@ -0,0 +1,37 @@
+[
+  {
+    "name": "sqrt_benchmark",
+    "type": "function",
+    "inputs": [
+      {
+        "name": "q",
+        "type": "u32",
+        "internalType": "u32"
+      },
+      {
+        "name": "times",
+        "type": "u32",
+        "internalType": "u32"
+      }
+    ],
+    "outputs": []
+  },
+  {
+    "name": "sqrt_test",
+    "type": "function",
+    "inputs": [
+      {
+        "name": "n",
+        "type": "u32",
+        "internalType": "u32"
+      }
+    ],
+    "outputs": [
+      {
+        "name": "",
+        "type": "u32",
+        "internalType": "u32"
+      }
+    ]
+  }
+]

src/abi.rs

@@ -121,7 +121,7 @@ impl Function {
         let mut hasher = Keccak::v256();
         hasher.update(self.signature().as_bytes());
         hasher.finalize(&mut keccak_out);
-        u32::from_be_bytes(keccak_out[0..4].try_into().unwrap()) as u64
+        u32::from_le_bytes(keccak_out[0..4].try_into().unwrap()) as u64
     }
 
     /// Returns the function's signature.