MAke it actually run

Cargo.toml

@@ -70,6 +70,7 @@ sp-blockchain = { branch = "release-polkadot-v1.5.0", git = "https://github.com/
 sp-consensus = { branch = "release-polkadot-v1.5.0", git = "https://github.com/paritytech/polkadot-sdk" }
 sp-consensus-pow = { branch = "release-polkadot-v1.5.0", default-features = false, git = "https://github.com/paritytech/polkadot-sdk" }
 sp-core = { branch = "release-polkadot-v1.5.0", default-features = false, git = "https://github.com/paritytech/polkadot-sdk" }
+sp-genesis-builder = { branch = "release-polkadot-v1.5.0", default-features = false, git = "https://github.com/paritytech/polkadot-sdk" }
 sp-inherents = { branch = "release-polkadot-v1.5.0", default-features = false, git = "https://github.com/paritytech/polkadot-sdk" }
 sp-io = { branch = "release-polkadot-v1.5.0", default-features = false, git = "https://github.com/paritytech/polkadot-sdk" }
 sp-keystore = { branch = "release-polkadot-v1.5.0", git = "https://github.com/paritytech/polkadot-sdk" }

multi-pow/src/lib.rs

@@ -61,7 +61,7 @@ pub struct Threshold {
 // This trait is not fully baked in the Substrate PoW code, so I will not use it for now.
 impl TotalDifficulty for Threshold {
     fn increment(&mut self, _: Threshold) {
-        unimplemented!()
+        // I'm pretty sure we don't do anything interesting with this... Let's see.
     }
 }
 

node/src/chain_spec.rs

@@ -71,28 +71,6 @@ pub fn testnet_config() -> Result<ChainSpec, String> {
     .build())
 }
 
-// pub fn custom_config(
-//     chain_name: &str,
-//     chain_id: &str,
-//     endowed_accounts: Vec<AccountId>,
-//     initial_difficulty: u32,
-// ) -> Result<ChainSpec, String> {
-//     let wasm_binary = WASM_BINARY.ok_or_else(|| "runtime WASM binary not available".to_string())?;
-
-//     Ok(ChainSpec::from_genesis(
-//         chain_name,
-//         chain_id,
-//         sc_service::ChainType::Live,
-//         move || genesis(wasm_binary, endowed_accounts.clone(), initial_difficulty),
-//         vec![],
-//         None,
-//         None,
-//         None,
-//         None,
-//         None,
-//     ))
-// }
-
 fn genesis(
     endowed_accounts: Vec<AccountId>,
     initial_difficulty: u32,
@@ -102,10 +80,9 @@ fn genesis(
 			// Configure endowed accounts with initial balance of 1 << 60.
 			"balances": endowed_accounts.iter().cloned().map(|k| (k, 1u64 << 60)).collect::<Vec<_>>(),
 		},
-        "difficulty_adjustment": {
-            "initial_difficulty": initial_difficulty,
-			// ..Default::default()
-        },
-        // transaction_payment: Default::default(),
+		//TODO Figure out how to convert a u32 into a proper json value here.
+        // "difficultyAdjustment": {
+        //     "initialDifficulty": serde_json::json!(initial_difficulty),
+        // },
     })
 }

runtime/Cargo.toml

@@ -24,6 +24,7 @@ sp-api = { workspace = true }
 sp-block-builder = { workspace = true }
 sp-consensus-pow = { workspace = true }
 sp-core = { workspace = true }
+sp-genesis-builder = { workspace = true }
 sp-inherents = { workspace = true }
 sp-io = { workspace = true }
 sp-keystore = { optional = true, workspace = true }
@@ -58,6 +59,7 @@ std = [
 	"sp-block-builder/std",
 	"sp-consensus-pow/std",
 	"sp-core/std",
+	"sp-genesis-builder/std",
 	"sp-inherents/std",
 	"sp-io/std",
 	"sp-offchain/std",

runtime/src/lib.rs

@@ -8,6 +8,7 @@
 #[cfg(feature = "std")]
 include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));
 
+use frame_support::genesis_builder_helper::{build_config, create_default_config};
 pub use frame_support::{
     construct_runtime, parameter_types,
     traits::{
@@ -604,4 +605,14 @@ impl pallet_transaction_payment_rpc_runtime_api::TransactionPaymentCallApi<Block
 			)
 		}
 	}
+
+    impl sp_genesis_builder::GenesisBuilder<Block> for Runtime {
+		fn create_default_config() -> Vec<u8> {
+			create_default_config::<RuntimeGenesisConfig>()
+		}
+
+		fn build_config(config: Vec<u8>) -> sp_genesis_builder::Result {
+			build_config::<RuntimeGenesisConfig>(config)
+		}
+	}
 }