op-e2e: Use fake tx manager

op-e2e/actions/l2_proposer.go

 package actions
 
 import (
+	"context"
 	"crypto/ecdsa"
 	"math/big"
 	"time"
@@ -17,6 +18,7 @@ import (
 	"github.com/ethereum-optimism/optimism/op-node/sources"
 	"github.com/ethereum-optimism/optimism/op-proposer/metrics"
 	"github.com/ethereum-optimism/optimism/op-proposer/proposer"
+	"github.com/ethereum-optimism/optimism/op-service/txmgr"
 )
 
 type ProposerCfg struct {
@@ -35,6 +37,17 @@ type L2Proposer struct {
 	lastTx       common.Hash
 }
 
+type fakeTxMgr struct {
+	from common.Address
+}
+
+func (f fakeTxMgr) From() common.Address {
+	return f.from
+}
+func (f fakeTxMgr) Send(_ context.Context, _ txmgr.TxCandidate) (*types.Receipt, error) {
+	panic("unimplemented")
+}
+
 func NewL2Proposer(t Testing, log log.Logger, cfg *ProposerCfg, l1 *ethclient.Client, rollupCl *sources.RollupClient) *L2Proposer {
 
 	proposerCfg := proposer.Config{
@@ -44,6 +57,7 @@ func NewL2Proposer(t Testing, log log.Logger, cfg *ProposerCfg, l1 *ethclient.Cl
 		RollupClient:       rollupCl,
 		AllowNonFinalized:  cfg.AllowNonFinalized,
 		// We use custom signing here instead of using the transaction manager.
+		TxManager: fakeTxMgr{from: crypto.PubkeyToAddress(cfg.ProposerKey.PublicKey)},
 	}
 
 	dr, err := proposer.NewL2OutputSubmitter(proposerCfg, log, metrics.NoopMetrics)