From fb6d8c83dac395be90cf23e06e57577145276b60 Mon Sep 17 00:00:00 2001
From: Alexandru Vasile <alexandru.vasile@parity.io>
Date: Tue, 13 Sep 2022 23:44:02 +0300
Subject: [PATCH] bin/node: Enable `chainSpec` API

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
---
 Cargo.lock              | 1 +
 bin/node/rpc/Cargo.toml | 1 +
 bin/node/rpc/src/lib.rs | 6 ++++++
 3 files changed, 8 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index fa5b4991d7674..6e25ff9d514f1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4830,6 +4830,7 @@ dependencies = [
  "sc-finality-grandpa-rpc",
  "sc-rpc",
  "sc-rpc-api",
+ "sc-rpc-spec",
  "sc-sync-state-rpc",
  "sc-transaction-pool-api",
  "sp-api",
diff --git a/bin/node/rpc/Cargo.toml b/bin/node/rpc/Cargo.toml
index 851eb2cfc5104..8bdd19e713bc9 100644
--- a/bin/node/rpc/Cargo.toml
+++ b/bin/node/rpc/Cargo.toml
@@ -26,6 +26,7 @@ sc-finality-grandpa = { version = "0.10.0-dev", path = "../../../client/finality
 sc-finality-grandpa-rpc = { version = "0.10.0-dev", path = "../../../client/finality-grandpa/rpc" }
 sc-rpc = { version = "4.0.0-dev", path = "../../../client/rpc" }
 sc-rpc-api = { version = "0.10.0-dev", path = "../../../client/rpc-api" }
+sc-rpc-spec = { version = "0.10.0-dev", path = "../../../client/rpc-spec" }
 sc-sync-state-rpc = { version = "0.10.0-dev", path = "../../../client/sync-state-rpc" }
 sc-transaction-pool-api = { version = "4.0.0-dev", path = "../../../client/transaction-pool/api" }
 sp-api = { version = "4.0.0-dev", path = "../../../primitives/api" }
diff --git a/bin/node/rpc/src/lib.rs b/bin/node/rpc/src/lib.rs
index 1c8b9cce1a744..be330b591c746 100644
--- a/bin/node/rpc/src/lib.rs
+++ b/bin/node/rpc/src/lib.rs
@@ -124,6 +124,7 @@ where
 	use sc_consensus_babe_rpc::{Babe, BabeApiServer};
 	use sc_finality_grandpa_rpc::{Grandpa, GrandpaApiServer};
 	use sc_rpc::dev::{Dev, DevApiServer};
+	use sc_rpc_spec::chain_spec::{ChainSpec, ChainSpecApiServer};
 	use sc_sync_state_rpc::{SyncState, SyncStateApiServer};
 	use substrate_frame_rpc_system::{System, SystemApiServer};
 	use substrate_state_trie_migration_rpc::{StateMigration, StateMigrationApiServer};
@@ -140,6 +141,11 @@ where
 		finality_provider,
 	} = grandpa;
 
+	let chain_name = chain_spec.name().to_string();
+	let genesis_hash = client.block_hash(0).ok().flatten().expect("Genesis block exists; qed");
+	let properties = chain_spec.properties();
+	io.merge(ChainSpec::new(chain_name, genesis_hash, properties).into_rpc())?;
+
 	io.merge(System::new(client.clone(), pool, deny_unsafe).into_rpc())?;
 	// Making synchronous calls in light client freezes the browser currently,
 	// more context: https://github.com/paritytech/substrate/pull/3480