Shiden block fix

client/rpc/src/eth/block.rs

@@ -33,7 +33,7 @@ use fc_rpc_core::types::*;
 use fp_rpc::EthereumRuntimeRPCApi;
 
 use crate::{
-	eth::{rich_block_build, Eth},
+	eth::{empty_block_from, rich_block_build, Eth},
 	frontier_backend_client, internal_err,
 };
 
@@ -174,7 +174,22 @@ where
 				}
 				Ok(Some(rich_block))
 			}
-			_ => Ok(None),
+			_ => {
+				if let BlockNumber::Num(block_number) = number {
+					let eth_block = empty_block_from(block_number.into());
+					let eth_hash =
+						H256::from_slice(keccak_256(&rlp::encode(&eth_block.header)).as_slice());
+					Ok(Some(rich_block_build(
+						eth_block,
+						Default::default(),
+						Some(eth_hash),
+						full,
+						None,
+					)))
+				} else {
+					Ok(None)
+				}
+			}
 		}
 	}
 

client/rpc/src/eth/mod.rs

@@ -424,6 +424,31 @@ fn rich_block_build(
 	}
 }
 
+fn empty_block_from(number: U256) -> ethereum::BlockV2 {
+	let ommers = Vec::<ethereum::Header>::new();
+	let receipts = Vec::<ethereum::ReceiptV2>::new();
+	let receipts_root = ethereum::util::ordered_trie_root(
+		receipts.iter().map(ethereum::EnvelopedEncodable::encode),
+	);
+	let logs_bloom = ethereum_types::Bloom::default();
+	let partial_header = ethereum::PartialHeader {
+		parent_hash: H256::default(),
+		beneficiary: Default::default(),
+		state_root: Default::default(),
+		receipts_root,
+		logs_bloom,
+		difficulty: U256::zero(),
+		number,
+		gas_limit: U256::from(4_000_000),
+		gas_used: U256::zero(),
+		timestamp: Default::default(),
+		extra_data: Vec::new(),
+		mix_hash: H256::default(),
+		nonce: H64::default(),
+	};
+	ethereum::Block::new(partial_header, Default::default(), ommers)
+}
+
 fn transaction_build(
 	ethereum_transaction: EthereumTransaction,
 	block: Option<EthereumBlock>,

primitives/consensus/src/lib.rs

@@ -130,5 +130,8 @@ pub fn find_log(digest: &Digest) -> Result<Log, FindLogError> {
 }
 
 pub fn ensure_log(digest: &Digest) -> Result<(), FindLogError> {
-	find_log(digest).map(|_log| ())
+	match find_log(digest) {
+		Err(FindLogError::MultipleLogs) => Err(FindLogError::MultipleLogs),
+		_ => Ok(()),
+	}
 }