fix: gas price value in eth_getTransaction JSON-RPC response (#1082)

Solution:
- pass the correct baseFee parameter

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

CHANGELOG.md

@@ -42,6 +42,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 * (cli) [tharsis#1086](https://github.com/tharsis/ethermint/pull/1086) Add rollback command.
 
+### Bug Fixes
+
+* (rpc) [tharsis#1082](https://github.com/tharsis/ethermint/pull/1082) fix gas price returned in getTransaction api.
+
 ## [v0.15.0] - 2022-05-09
 
 ### State Machine Breaking

rpc/backend/evm_backend.go

@@ -586,7 +586,7 @@ func (b *Backend) GetTransactionByHash(txHash common.Hash) (*types.RPCTransactio
 					common.Hash{},
 					uint64(0),
 					uint64(0),
-					b.chainID,
+					nil,
 				)
 				if err != nil {
 					return nil, err
@@ -649,12 +649,17 @@ func (b *Backend) GetTransactionByHash(txHash common.Hash) (*types.RPCTransactio
 		return nil, errors.New("can't find index of ethereum tx")
 	}
 
+	baseFee, err := b.BaseFee(block.Block.Height)
+	if err != nil {
+		return nil, err
+	}
+
 	return types.NewTransactionFromMsg(
 		msg,
 		common.BytesToHash(block.BlockID.Hash.Bytes()),
 		uint64(res.Height),
 		txIndex,
-		b.chainID,
+		baseFee,
 	)
 }
 

rpc/namespaces/ethereum/eth/api.go

@@ -764,12 +764,17 @@ func (e *PublicAPI) getTransactionByBlockAndIndex(block *tmrpctypes.ResultBlock,
 		msg = ethMsgs[i]
 	}
 
+	baseFee, err := e.backend.BaseFee(block.Block.Height)
+	if err != nil {
+		return nil, err
+	}
+
 	return rpctypes.NewTransactionFromMsg(
 		msg,
 		common.BytesToHash(block.Block.Hash()),
 		uint64(block.Block.Height),
 		uint64(idx),
-		e.chainIDEpoch,
+		baseFee,
 	)
 }
 
@@ -983,7 +988,7 @@ func (e *PublicAPI) GetPendingTransactions() ([]*rpctypes.RPCTransaction, error)
 				common.Hash{},
 				uint64(0),
 				uint64(0),
-				e.chainIDEpoch,
+				nil,
 			)
 			if err != nil {
 				return nil, err