feat: allow configuring the L1GasPrice over a new private namespace

Author: gakonst

eth/api_backend.go

@@ -376,6 +376,10 @@ func (b *EthAPIBackend) SuggestDataPrice(ctx context.Context) (*big.Int, error)
 	return b.l1gpo.SuggestDataPrice(ctx)
 }
 
+func (b *EthAPIBackend) SetL1GasPrice(ctx context.Context, gasPrice *big.Int) {
+	b.l1gpo.SetL1GasPrice(gasPrice)
+}
+
 func (b *EthAPIBackend) ChainDb() ethdb.Database {
 	return b.eth.ChainDb()
 }

eth/gasprice/l1_gasprice.go

@@ -18,3 +18,7 @@ func NewL1Oracle(gasPrice *big.Int) *L1Oracle {
 func (gpo *L1Oracle) SuggestDataPrice(ctx context.Context) (*big.Int, error) {
 	return gpo.gasPrice, nil
 }
+
+func (gpo *L1Oracle) SetL1GasPrice(gasPrice *big.Int) {
+	gpo.gasPrice = gasPrice
+}

internal/ethapi/api.go

@@ -1957,6 +1957,24 @@ func (api *PublicRollupAPI) GetInfo(ctx context.Context) rollupInfo {
 	}
 }
 
+// PrivatelRollupAPI provides private RPC methods to control the sequencer.
+// These methods can be abused by external users and must be considered insecure for use by untrusted users.
+type PrivateRollupAPI struct {
+	b Backend
+}
+
+// NewPrivateRollupAPI creates a new API definition for the rollup methods of the
+// Ethereum service.
+func NewPrivateRollupAPI(b Backend) *PrivateRollupAPI {
+	return &PrivateRollupAPI{b: b}
+}
+
+// SetGasPrice sets the gas price to be used when quoting calldata publishing costs
+// to users
+func (api *PrivateRollupAPI) SetL1GasPrice(ctx context.Context, gasPrice hexutil.Big) {
+	api.b.SetL1GasPrice(ctx, (*big.Int)(&gasPrice))
+}
+
 // PublicDebugAPI is the collection of Ethereum APIs exposed over the public
 // debugging endpoint.
 type PublicDebugAPI struct {

internal/ethapi/backend.go

@@ -95,6 +95,7 @@ type Backend interface {
 	GasLimit() uint64
 	GetDiff(*big.Int) (diffdb.Diff, error)
 	SuggestDataPrice(ctx context.Context) (*big.Int, error)
+	SetL1GasPrice(context.Context, *big.Int)
 }
 
 func GetAPIs(apiBackend Backend) []rpc.API {
@@ -120,6 +121,10 @@ func GetAPIs(apiBackend Backend) []rpc.API {
 			Version:   "1.0",
 			Service:   NewPublicRollupAPI(apiBackend),
 			Public:    true,
+		}, {
+			Namespace: "rollup_personal",
+			Version:   "1.0",
+			Service:   NewPrivateRollupAPI(apiBackend),
 		}, {
 			Namespace: "txpool",
 			Version:   "1.0",

les/api_backend.go

@@ -283,7 +283,12 @@ func (b *LesApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
 
 // NB: Non sequencer nodes cannot suggest L1 gas prices.
 func (b *LesApiBackend) SuggestDataPrice(ctx context.Context) (*big.Int, error) {
-	panic("not implemented")
+	panic("SuggestDataPrice not implemented")
+}
+
+// NB: Non sequencer nodes cannot set L1 gas prices.
+func (b *LesApiBackend) SetL1GasPrice(ctx context.Context, gasPrice *big.Int) {
+	panic("SetL1GasPrice is not implemented")
 }
 
 func (b *LesApiBackend) ChainDb() ethdb.Database {