make fields defaulting to 0 optional

json/src/blockchain/blockchain.rs

@@ -59,9 +59,9 @@ impl BlockChain {
 				mix_hash: self.genesis_block.mix_hash.clone(),
 			}),
 			difficulty: self.genesis_block.difficulty,
-			author: self.genesis_block.author.clone(),
-			timestamp: self.genesis_block.timestamp,
-			parent_hash: self.genesis_block.parent_hash.clone(),
+			author: Some(self.genesis_block.author.clone()),
+			timestamp: Some(self.genesis_block.timestamp),
+			parent_hash: Some(self.genesis_block.parent_hash.clone()),
 			gas_limit: self.genesis_block.gas_limit,
 			transactions_root: Some(self.genesis_block.transactions_root.clone()),
 			receipts_root: Some(self.genesis_block.receipts_root.clone()),

json/src/spec/genesis.rs

@@ -28,13 +28,13 @@ pub struct Genesis {
 	pub seal: Seal,
 	/// Difficulty.
 	pub difficulty: Uint,
-	/// Block author.
-	pub author: Address,
-	/// Block timestamp.
-	pub timestamp: Uint,
-	/// Parent hash.
+	/// Block author, defaults to 0.
+	pub author: Option<Address>,
+	/// Block timestamp, defaults to 0.
+	pub timestamp: Option<Uint>,
+	/// Parent hash, defaults to 0.
 	#[serde(rename="parentHash")]
-	pub parent_hash: H256,
+	pub parent_hash: Option<H256>,
 	/// Gas limit.
 	#[serde(rename="gasLimit")]
 	pub gas_limit: Uint,

json/src/spec/params.rs

@@ -22,9 +22,9 @@ use hash::H256;
 /// Spec params.
 #[derive(Debug, PartialEq, Deserialize)]
 pub struct Params {
-	/// Account start nonce.
+	/// Account start nonce, defaults to 0.
 	#[serde(rename="accountStartNonce")]
-	pub account_start_nonce: Uint,
+	pub account_start_nonce: Option<Uint>,
 	/// Maximum size of extra data.
 	#[serde(rename="maximumExtraDataSize")]
 	pub maximum_extra_data_size: Uint,