From 31d874007d24b6e598b79f1f08d2a8defbceebf2 Mon Sep 17 00:00:00 2001
From: Manuel Mauro <manuel.mauro@protonmail.com>
Date: Tue, 21 Jan 2025 16:50:56 +0100
Subject: [PATCH] feat: :sparkles: add genesis builder dummy development preset

---
 Cargo.lock                   |  4 ++++
 runtime/common/Cargo.toml    |  1 +
 runtime/common/src/apis.rs   | 20 ++++++++++++++++++--
 runtime/moonbase/Cargo.toml  |  1 +
 runtime/moonbeam/Cargo.toml  |  1 +
 runtime/moonriver/Cargo.toml |  1 +
 6 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index a1645e4030..a13536f44a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6308,6 +6308,7 @@ dependencies = [
  "rlp",
  "scale-info",
  "serde",
+ "serde_json",
  "session-keys-primitives",
  "sha3",
  "smallvec",
@@ -6821,6 +6822,7 @@ dependencies = [
  "rlp",
  "scale-info",
  "serde",
+ "serde_json",
  "session-keys-primitives",
  "sha3",
  "smallvec",
@@ -6913,6 +6915,7 @@ dependencies = [
  "parity-scale-codec",
  "precompile-utils",
  "scale-info",
+ "serde_json",
  "sp-api",
  "sp-consensus-slots",
  "sp-core",
@@ -7251,6 +7254,7 @@ dependencies = [
  "rlp",
  "scale-info",
  "serde",
+ "serde_json",
  "session-keys-primitives",
  "sha3",
  "smallvec",
diff --git a/runtime/common/Cargo.toml b/runtime/common/Cargo.toml
index d3c3027be3..19f46062b1 100644
--- a/runtime/common/Cargo.toml
+++ b/runtime/common/Cargo.toml
@@ -11,6 +11,7 @@ version = "0.8.0-dev"
 hex-literal = "0.3.4"
 impl-trait-for-tuples = "0.2.1"
 log = "0.4"
+serde_json = { version = "1.0.114", default-features = false }
 
 # Moonbeam
 moonbeam-core-primitives = { workspace = true }
diff --git a/runtime/common/src/apis.rs b/runtime/common/src/apis.rs
index 144a82f966..8768edd419 100644
--- a/runtime/common/src/apis.rs
+++ b/runtime/common/src/apis.rs
@@ -43,6 +43,12 @@ macro_rules! impl_runtime_apis_plus_common {
 			}
 		}
 
+		fn testnet_genesis() -> serde_json::Value {
+			let config = RuntimeGenesisConfig::default();
+
+			serde_json::to_value(config).expect("Could not build genesis config.")
+		}
+
 		impl_runtime_apis! {
 			$($custom)*
 
@@ -121,11 +127,21 @@ macro_rules! impl_runtime_apis_plus_common {
 				}
 
 				fn get_preset(id: &Option<sp_genesis_builder::PresetId>) -> Option<Vec<u8>> {
-					frame_support::genesis_builder_helper::get_preset::<RuntimeGenesisConfig>(id, |_| None)
+					frame_support::genesis_builder_helper::get_preset::<RuntimeGenesisConfig>(id, |id| {
+						let patch = match id.try_into() {
+							Ok(sp_genesis_builder::DEV_RUNTIME_PRESET) => testnet_genesis(),
+							_ => return None,
+						};
+						Some(
+							serde_json::to_string(&patch)
+								.expect("serialization to json is expected to work. qed.")
+								.into_bytes(),
+						)
+					})
 				}
 
 				fn preset_names() -> Vec<sp_genesis_builder::PresetId> {
-					vec![]
+					vec![sp_genesis_builder::PresetId::from(sp_genesis_builder::DEV_RUNTIME_PRESET)]
 				}
 			}
 
diff --git a/runtime/moonbase/Cargo.toml b/runtime/moonbase/Cargo.toml
index 8d334d43ad..3763413aba 100644
--- a/runtime/moonbase/Cargo.toml
+++ b/runtime/moonbase/Cargo.toml
@@ -14,6 +14,7 @@ log = { workspace = true }
 num_enum = { workspace = true }
 rlp = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"] }
+serde_json = { version = "1.0.114", default-features = false }
 sha3 = { workspace = true, optional = true }
 smallvec = { workspace = true }
 strum = { workspace = true }
diff --git a/runtime/moonbeam/Cargo.toml b/runtime/moonbeam/Cargo.toml
index 1f87feabe2..249c4f3310 100644
--- a/runtime/moonbeam/Cargo.toml
+++ b/runtime/moonbeam/Cargo.toml
@@ -14,6 +14,7 @@ log = { workspace = true }
 num_enum = { workspace = true }
 rlp = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"] }
+serde_json = { version = "1.0.114", default-features = false }
 sha3 = { workspace = true, optional = true }
 smallvec = { workspace = true }
 strum = { workspace = true }
diff --git a/runtime/moonriver/Cargo.toml b/runtime/moonriver/Cargo.toml
index 7ac5e41d7d..10faba487d 100644
--- a/runtime/moonriver/Cargo.toml
+++ b/runtime/moonriver/Cargo.toml
@@ -14,6 +14,7 @@ log = { workspace = true }
 num_enum = { workspace = true }
 rlp = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"] }
+serde_json = { version = "1.0.114", default-features = false }
 sha3 = { workspace = true, optional = true }
 smallvec = { workspace = true }
 strum = { workspace = true }