mark txs signed by builder as known txs (#97)

miner/worker.go

@@ -1547,11 +1547,22 @@ func (w *worker) generateWork(params *generateParams) (*types.Block, *big.Int, e
 	orderCloseTime := time.Now()
 
 	blockBundles, allBundles, usedSbundles, mempoolTxHashes, err := w.fillTransactionsSelectAlgo(nil, work)
-
 	if err != nil {
 		return nil, nil, err
 	}
 
+	// We mark transactions created by the builder as mempool transactions so code validating bundles will not fail
+	// for transactions created by the builder such as mev share refunds.
+	for _, tx := range work.txs {
+		from, err := types.Sender(work.signer, tx)
+		if err != nil {
+			return nil, nil, err
+		}
+		if from == work.coinbase {
+			mempoolTxHashes[tx.Hash()] = struct{}{}
+		}
+	}
+
 	err = VerifyBundlesAtomicity(work, blockBundles, allBundles, usedSbundles, mempoolTxHashes)
 	if err != nil {
 		log.Error("Bundle invariant is violated for built block", "block", work.header.Number, "err", err)