From 765b019edbbda6c4f8302dffa07c86d464fb3904 Mon Sep 17 00:00:00 2001
From: hswick <hdswick@gmail.com>
Date: Thu, 27 Sep 2018 15:27:12 -0500
Subject: [PATCH] Added call_async and send_async

---
 lib/exw3.ex        | 16 ++++++++++++++++
 test/exw3_test.exs | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/lib/exw3.ex b/lib/exw3.ex
index 90ccbb9..5e98c04 100644
--- a/lib/exw3.ex
+++ b/lib/exw3.ex
@@ -545,6 +545,22 @@ defmodule ExW3 do
       GenServer.call(ContractManager, {:send, {contract_name, method_name, args, options}})
     end
 
+    @spec call_async(keyword(), keyword(), []) :: {:ok, any()}
+    @doc "Use a Contract's method with an eth_call. Returns a Task to be awaited."
+    def call_async(contract_name, method_name, args \\ []) do
+      Task.async(fn ->
+	GenServer.call(ContractManager, {:call, {contract_name, method_name, args}})
+      end)
+    end
+
+    @spec send_async(keyword(), keyword(), [], %{}) :: {:ok, binary()}
+    @doc "Use a Contract's method with an eth_sendTransaction. Returns a Task to be awaited."
+    def send_async(contract_name, method_name, args, options) do
+      Task.async(fn ->
+	GenServer.call(ContractManager, {:send, {contract_name, method_name, args, options}})
+      end)
+    end    
+    
     @spec tx_receipt(keyword(), binary()) :: %{}
     @doc "Returns a formatted transaction receipt for the given transaction hash(id)"
     def tx_receipt(contract_name, tx_hash) do
diff --git a/test/exw3_test.exs b/test/exw3_test.exs
index f010ec8..d4caf78 100644
--- a/test/exw3_test.exs
+++ b/test/exw3_test.exs
@@ -559,4 +559,42 @@ defmodule EXW3Test do
     assert ExW3.from_wei(1_000_000_000_000_000_000, :tether) == 0.000000000001
   end
 
+  test "send and call sync with SimpleStorage", context do
+    
+    
+    ExW3.Contract.register(:SimpleStorage, abi: context[:simple_storage_abi])
+
+    {:ok, address, _} =
+      ExW3.Contract.deploy(
+	:SimpleStorage,
+        bin: ExW3.load_bin("test/examples/build/SimpleStorage.bin"),
+        args: [],
+        options: %{
+          gas: 300_000,
+          from: Enum.at(context[:accounts], 0)
+        }
+      )
+
+    ExW3.Contract.at(:SimpleStorage, address)
+
+    assert address == ExW3.Contract.address(:SimpleStorage)
+
+    t = ExW3.Contract.call_async(:SimpleStorage, :get)
+
+    {:ok, data} = Task.await(t)
+
+    assert data == 0
+
+    t = ExW3.Contract.send_async(:SimpleStorage, :set, [1], %{from: Enum.at(context[:accounts], 0), gas: 50_000})
+
+    Task.await(t)
+
+    t = ExW3.Contract.call_async(:SimpleStorage, :get)
+
+    {:ok, data} = Task.await(t)
+
+    assert data == 1
+  end
+  
+
 end