fix(rpc): decode finalized block number

CHANGELOG.md

@@ -72,6 +72,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* (rpc) [#1442](https://github.com/evmos/ethermint/pull/1442) Fix decoding of `finalized` block number.
 * (rpc) [#1179](https://github.com/evmos/ethermint/pull/1179) Fix gas used in traceTransaction response.
 * (rpc) [#1284](https://github.com/evmos/ethermint/pull/1284) Fix internal trace response upon incomplete `eth_sendTransaction` call.
 * (rpc) [#1340](https://github.com/evmos/ethermint/pull/1340) Fix error response when `eth_estimateGas` height provided is not found.

rpc/types/block.go

@@ -159,7 +159,7 @@ func (bnh *BlockNumberOrHash) decodeFromString(input string) error {
 	case BlockParamEarliest:
 		bn := EthEarliestBlockNumber
 		bnh.BlockNumber = &bn
-	case BlockParamLatest:
+	case BlockParamLatest, BlockParamFinalized:
 		bn := EthLatestBlockNumber
 		bnh.BlockNumber = &bn
 	case BlockParamPending: