From 91180b77cf1ae022dfec19e184cc5f155de39ccc Mon Sep 17 00:00:00 2001
From: Danilo Tuler <danilo@cartesi.io>
Date: Wed, 4 Dec 2019 04:35:34 -0500
Subject: [PATCH] Adds eth_chainId method call (#293)

---
 src/api/eth.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/api/eth.rs b/src/api/eth.rs
index 82fe144b..212e8e0a 100644
--- a/src/api/eth.rs
+++ b/src/api/eth.rs
@@ -166,6 +166,11 @@ impl<T: Transport> Eth<T> {
         CallFuture::new(self.transport.execute("eth_getCompilers", vec![]))
     }
 
+    /// Get chain id
+    pub fn chain_id(&self) -> CallFuture<U256, T::Out> {
+        CallFuture::new(self.transport.execute("eth_chainId", vec![]))
+    }
+
     /// Get storage entry
     pub fn storage(&self, address: Address, idx: U256, block: Option<BlockNumber>) -> CallFuture<H256, T::Out> {
         let address = helpers::serialize(&address);
@@ -541,6 +546,11 @@ mod tests {
     Value::Array(vec![]) => vec![]
   );
 
+    rpc_test! (
+    Eth:chain_id => "eth_chainId";
+    Value::String("0x123".into()) => 0x123
+  );
+
     rpc_test! (
     Eth:storage, Address::from_low_u64_be(0x123), 0x456, None
     =>