From 9778794a8f9a7e7a03098f986c4ba001258eab6e Mon Sep 17 00:00:00 2001
From: Tony Arcieri <tony@iqlusion.io>
Date: Thu, 25 Jul 2019 17:45:13 -0700
Subject: [PATCH] tendermint-rs: Add `TendermintConfig::load_genesis_file`

Support for loading `genesis.json` from the path configured in
`config.toml` (given a home directory)
---
 tendermint-rs/src/config.rs | 13 +++++++++++++
 tendermint-rs/src/lib.rs    |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/tendermint-rs/src/config.rs b/tendermint-rs/src/config.rs
index f9f2980..9042549 100644
--- a/tendermint-rs/src/config.rs
+++ b/tendermint-rs/src/config.rs
@@ -14,6 +14,7 @@ pub use self::{node_key::NodeKey, priv_validator_key::PrivValidatorKey};
 use crate::{
     abci::tag,
     error::{Error, ErrorKind},
+    genesis::Genesis,
     net, node, Moniker, Timeout,
 };
 use serde::{de, de::Error as _, ser, Deserialize, Serialize};
@@ -120,6 +121,18 @@ impl TendermintConfig {
 
         Self::parse_toml(toml_string)
     }
+
+    /// Load `genesis.json` file from the configured location
+    pub fn load_genesis_file<P>(&self, home: &P) -> Result<Genesis, Error>
+    where
+        P: AsRef<Path>,
+    {
+        let path = home.as_ref().join(&self.genesis_file);
+        let genesis_json = fs::read_to_string(&path)
+            .map_err(|e| err!(ErrorKind::Parse, "couldn't open {}: {}", path.display(), e))?;
+
+        Ok(serde_json::from_str(genesis_json.as_ref())?)
+    }
 }
 
 /// Database backend
diff --git a/tendermint-rs/src/lib.rs b/tendermint-rs/src/lib.rs
index 345f42a..f9ba29d 100644
--- a/tendermint-rs/src/lib.rs
+++ b/tendermint-rs/src/lib.rs
@@ -39,7 +39,7 @@ pub mod channel;
 pub mod config;
 pub mod consensus;
 pub mod evidence;
-#[cfg(feature = "rpc")]
+#[cfg(any(feature = "config", feature = "rpc"))]
 pub mod genesis;
 pub mod hash;
 pub mod merkle;