eth, txpool: enforce 30gwei for gas related configs for polygon (#10119)

This PR enforces the params `txpool.pricelimit`, `miner.gasprice` and
`gpo.ignoreprice` to be set to 30 gwei when running `erigon` for Polygon
chains.

`bor` related PR: maticnetwork/bor#1232

erigon-lib/txpool/txpoolcfg/txpoolcfg.go

@@ -23,11 +23,15 @@ import (
 
 	"github.com/c2h5oh/datasize"
 
+	"github.com/ledgerwatch/erigon-lib/common"
 	"github.com/ledgerwatch/erigon-lib/common/fixedgas"
 	emath "github.com/ledgerwatch/erigon-lib/common/math"
 	"github.com/ledgerwatch/erigon-lib/types"
 )
 
+// BorDefaultTxPoolPriceLimit defines the minimum gas price limit for bor to enforce txs acceptance into the pool.
+const BorDefaultTxPoolPriceLimit = 30 * common.GWei
+
 type Config struct {
 	DBDir               string
 	TracedSenders       []string // List of senders for which tx pool should print out debugging info

eth/backend.go

@@ -74,6 +74,7 @@ import (
 	"github.com/ledgerwatch/erigon-lib/kv/temporal"
 	libstate "github.com/ledgerwatch/erigon-lib/state"
 	"github.com/ledgerwatch/erigon-lib/txpool"
+	"github.com/ledgerwatch/erigon-lib/txpool/txpoolcfg"
 	"github.com/ledgerwatch/erigon-lib/txpool/txpooluitl"
 	libtypes "github.com/ledgerwatch/erigon-lib/types"
 	"github.com/ledgerwatch/erigon-lib/wrap"
@@ -314,6 +315,9 @@ func New(ctx context.Context, stack *node.Node, config *ethconfig.Config, logger
 	backend.genesisBlock = genesis
 	backend.genesisHash = genesis.Hash()
 
+	setBorDefaultMinerGasPrice(chainConfig, config, logger)
+	setBorDefaultTxPoolPriceLimit(chainConfig, config.TxPool, logger)
+
 	if err := chainKv.Update(context.Background(), func(tx kv.RwTx) error {
 		isCorrectSync, useSnapshots, err := snap.EnsureNotChanged(tx, config.Snapshot)
 		if err != nil {
@@ -1709,3 +1713,19 @@ func (s *Ethereum) Sentinel() rpcsentinel.SentinelClient {
 func (s *Ethereum) DataDir() string {
 	return s.config.Dirs.DataDir
 }
+
+// setBorDefaultMinerGasPrice enforces Miner.GasPrice to be equal to BorDefaultMinerGasPrice (30gwei by default)
+func setBorDefaultMinerGasPrice(chainConfig *chain.Config, config *ethconfig.Config, logger log.Logger) {
+	if chainConfig.Bor != nil && config.Miner.GasPrice == nil || config.Miner.GasPrice.Cmp(ethconfig.BorDefaultMinerGasPrice) != 0 {
+		logger.Warn("Sanitizing invalid bor miner gas price", "provided", config.Miner.GasPrice, "updated", ethconfig.BorDefaultMinerGasPrice)
+		config.Miner.GasPrice = ethconfig.BorDefaultMinerGasPrice
+	}
+}
+
+// setBorDefaultTxPoolPriceLimit enforces MinFeeCap to be equal to BorDefaultTxPoolPriceLimit  (30gwei by default)
+func setBorDefaultTxPoolPriceLimit(chainConfig *chain.Config, config txpoolcfg.Config, logger log.Logger) {
+	if chainConfig.Bor != nil && config.MinFeeCap != txpoolcfg.BorDefaultTxPoolPriceLimit {
+		logger.Warn("Sanitizing invalid bor min fee cap", "provided", config.MinFeeCap, "updated", txpoolcfg.BorDefaultTxPoolPriceLimit)
+		config.MinFeeCap = txpoolcfg.BorDefaultTxPoolPriceLimit
+	}
+}

eth/ethconfig/config.go

@@ -46,6 +46,9 @@ import (
 
 //const HistoryV3AggregationStep = 1_562_500 / 10 // use this to reduce step size for dev/debug
 
+// BorDefaultMinerGasPrice defines the minimum gas price for bor validators to mine a transaction.
+var BorDefaultMinerGasPrice = big.NewInt(30 * params.GWei)
+
 // FullNodeGPO contains default gasprice oracle settings for full node.
 var FullNodeGPO = gaspricecfg.Config{
 	Blocks:           20,

eth/gasprice/gasprice.go

@@ -91,6 +91,9 @@ func NewOracle(backend OracleBackend, params gaspricecfg.Config, cache Cache) *O
 		ignorePrice = gaspricecfg.DefaultIgnorePrice
 		log.Warn("Sanitizing invalid gasprice oracle ignore price", "provided", params.IgnorePrice, "updated", ignorePrice)
 	}
+
+	setBorDefaultGpoIgnorePrice(backend.ChainConfig(), params)
+
 	return &Oracle{
 		backend:          backend,
 		lastPrice:        params.Default,
@@ -280,3 +283,11 @@ func (s *sortingHeap) Pop() interface{} {
 	*s = old[0 : n-1]
 	return x
 }
+
+// setBorDefaultGpoIgnorePrice enforces gpo IgnorePrice to be equal to BorDefaultGpoIgnorePrice  (30gwei by default)
+func setBorDefaultGpoIgnorePrice(chainConfig *chain.Config, gasPriceConfig gaspricecfg.Config) {
+	if chainConfig.Bor != nil && gasPriceConfig.IgnorePrice != gaspricecfg.BorDefaultGpoIgnorePrice {
+		log.Warn("Sanitizing invalid bor gasprice oracle ignore price", "provided", gasPriceConfig.IgnorePrice, "updated", gaspricecfg.BorDefaultGpoIgnorePrice)
+		gasPriceConfig.IgnorePrice = gaspricecfg.BorDefaultGpoIgnorePrice
+	}
+}

eth/gasprice/gaspricecfg/gaspricecfg.go

@@ -8,6 +8,9 @@ import (
 
 var DefaultIgnorePrice = big.NewInt(2 * params.Wei)
 
+// BorDefaultGpoIgnorePrice defines the minimum gas price below which bor gpo will ignore transactions.
+var BorDefaultGpoIgnorePrice = big.NewInt(30 * params.Wei)
+
 var (
 	DefaultMaxPrice = big.NewInt(500 * params.GWei)
 )