Add hello and build.sh

build.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+export WASM_LLVM_BIN="./llvm-wasm/bin/"
+
+function print_contract () {
+    wasm_file=$1
+    echo "${wasm_file} eWASM bytecode:"
+    echo "0x"`xxd -p $wasm_file | tr -d '\n'`
+}
+
+nimble examples
+
+if [ $? -eq 0 ]; then
+    print_contract examples/hello.wasm
+fi

eth_contracts.nimble

@@ -15,3 +15,4 @@ proc buildExample(name: string) =
 task examples, "Build examples":
   buildExample("wrc20")
   buildExample("wrc202")
+  buildExample("hello")

examples/hello.nim

@@ -0,0 +1,36 @@
+import ../eth_contracts
+
+proc hello(): int64 =
+    return 1234567
+
+proc main() {.exportwasm.} =
+    var res: int64 = 1234567
+    finish(addr res, sizeof(res).int32)
+
+
+discard """
+[
+    {
+        "name": "hello",
+        "outputs": [
+            {
+                "type": "int64",
+                "name": "out"
+            }
+        ],
+        "inputs": [
+            {
+                "type": "int64",
+                "name": "a"
+            },
+            {
+                "type": "int64",
+                "name": "b"
+            }
+        ],
+        "constant": false,
+        "payable": false,
+        "type": "function",
+    }
+]
+"""