make fields defaulting to 0 optional
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@@ -59,9 +59,9 @@ impl BlockChain {
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mix_hash: self.genesis_block.mix_hash.clone(),
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}),
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difficulty: self.genesis_block.difficulty,
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author: self.genesis_block.author.clone(),
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timestamp: self.genesis_block.timestamp,
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parent_hash: self.genesis_block.parent_hash.clone(),
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author: Some(self.genesis_block.author.clone()),
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timestamp: Some(self.genesis_block.timestamp),
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parent_hash: Some(self.genesis_block.parent_hash.clone()),
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gas_limit: self.genesis_block.gas_limit,
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transactions_root: Some(self.genesis_block.transactions_root.clone()),
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receipts_root: Some(self.genesis_block.receipts_root.clone()),
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