eth/gasprice: remove default from config (#30080)

* eth/gasprice: remove default from config

* eth/gasprice: sanitize startPrice

eth/backend.go

@@ -264,11 +264,7 @@ func New(stack *node.Node, config *ethconfig.Config) (*Ethereum, error) {
 	if eth.APIBackend.allowUnprotectedTxs {
 		log.Info("Unprotected transactions allowed")
 	}
-	gpoParams := config.GPO
+	eth.APIBackend.gpo = gasprice.NewOracle(eth.APIBackend, config.GPO, config.Miner.GasPrice)
-	if gpoParams.Default == nil {
-		gpoParams.Default = config.Miner.GasPrice
-	}
-	eth.APIBackend.gpo = gasprice.NewOracle(eth.APIBackend, gpoParams)
 
 	// Setup DNS discovery iterators.
 	dnsclient := dnsdisc.NewClient(dnsdisc.Config{})

eth/gasprice/feehistory_test.go

@@ -59,7 +59,7 @@ func TestFeeHistory(t *testing.T) {
 			MaxBlockHistory:  c.maxBlock,
 		}
 		backend := newTestBackend(t, big.NewInt(16), big.NewInt(28), c.pending)
-		oracle := NewOracle(backend, config)
+		oracle := NewOracle(backend, config, nil)
 
 		first, reward, baseFee, ratio, blobBaseFee, blobRatio, err := oracle.FeeHistory(context.Background(), c.count, c.last, c.percent)
 		backend.teardown()

eth/gasprice/gasprice.go

@@ -45,7 +45,6 @@ type Config struct {
 	Percentile       int
 	MaxHeaderHistory uint64
 	MaxBlockHistory  uint64
-	Default          *big.Int `toml:",omitempty"`
 	MaxPrice         *big.Int `toml:",omitempty"`
 	IgnorePrice      *big.Int `toml:",omitempty"`
 }
@@ -79,7 +78,7 @@ type Oracle struct {
 
 // NewOracle returns a new gasprice oracle which can recommend suitable
 // gasprice for newly created transaction.
-func NewOracle(backend OracleBackend, params Config) *Oracle {
+func NewOracle(backend OracleBackend, params Config, startPrice *big.Int) *Oracle {
 	blocks := params.Blocks
 	if blocks < 1 {
 		blocks = 1
@@ -115,6 +114,9 @@ func NewOracle(backend OracleBackend, params Config) *Oracle {
 		maxBlockHistory = 1
 		log.Warn("Sanitizing invalid gasprice oracle max block history", "provided", params.MaxBlockHistory, "updated", maxBlockHistory)
 	}
+	if startPrice == nil {
+		startPrice = new(big.Int)
+	}
 
 	cache := lru.NewCache[cacheKey, processedFees](2048)
 	headEvent := make(chan core.ChainHeadEvent, 1)
@@ -131,7 +133,7 @@ func NewOracle(backend OracleBackend, params Config) *Oracle {
 
 	return &Oracle{
 		backend:          backend,
-		lastPrice:        params.Default,
+		lastPrice:        startPrice,
 		maxPrice:         maxPrice,
 		ignorePrice:      ignorePrice,
 		checkBlocks:      blocks,

eth/gasprice/gasprice_test.go

@@ -235,7 +235,6 @@ func TestSuggestTipCap(t *testing.T) {
 	config := Config{
 		Blocks:     3,
 		Percentile: 60,
-		Default:    big.NewInt(params.GWei),
 	}
 	var cases = []struct {
 		fork   *big.Int // London fork number
@@ -249,7 +248,7 @@ func TestSuggestTipCap(t *testing.T) {
 	}
 	for _, c := range cases {
 		backend := newTestBackend(t, c.fork, nil, false)
-		oracle := NewOracle(backend, config)
+		oracle := NewOracle(backend, config, big.NewInt(params.GWei))
 
 		// The gas price sampled is: 32G, 31G, 30G, 29G, 28G, 27G
 		got, err := oracle.SuggestTipCap(context.Background())