Merge pull request ethereum#80 from ethereum-optimism/handle-local-only-tx-pool-err

eth: when forwarding txs, silence local tx pool errors

Author: trianglesphere

eth/api_backend.go

@@ -39,6 +39,7 @@ import (
 	"github.com/ethereum/go-ethereum/eth/tracers"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
+	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/miner"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rpc"
@@ -290,6 +291,11 @@ func (b *EthAPIBackend) SendTx(ctx context.Context, tx *types.Transaction) error
 		if err := b.eth.seqRPCService.CallContext(ctx, nil, "eth_sendRawTransaction", hexutil.Encode(data)); err != nil {
 			return err
 		}
+		// Retain tx in local tx pool after forwarding, for local RPC usage.
+		if err := b.eth.txPool.AddLocal(tx); err != nil {
+			log.Warn("successfully sent tx to sequencer, but failed to persist in local tx pool", "err", err, "tx", tx.Hash())
+		}
+		return nil
 	}
 	return b.eth.txPool.AddLocal(tx)
 }