cmd, core, eth, miner: remove txpool gas price limits (#14442)

eth/api.go

@@ -153,6 +153,8 @@ func (api *PrivateMinerAPI) Start(threads *int) error {
 	}
 	// Start the miner and return
 	if !api.e.IsMining() {
+		// Propagate the initial price point to the transaction pool
+		api.e.txPool.SetGasPrice(api.e.gasPrice)
 		return api.e.StartMining(true)
 	}
 	return nil
@@ -180,7 +182,7 @@ func (api *PrivateMinerAPI) SetExtra(extra string) (bool, error) {
 
 // SetGasPrice sets the minimum accepted gas price for the miner.
 func (api *PrivateMinerAPI) SetGasPrice(gasPrice hexutil.Big) bool {
-	api.e.Miner().SetGasPrice((*big.Int)(&gasPrice))
+	api.e.txPool.SetGasPrice((*big.Int)(&gasPrice))
 	return true
 }
 

eth/backend.go

@@ -20,6 +20,7 @@ package eth
 import (
 	"errors"
 	"fmt"
+	"math/big"
 	"runtime"
 	"sync"
 	"sync/atomic"
@@ -76,6 +77,7 @@ type Ethereum struct {
 	ApiBackend *EthApiBackend
 
 	miner        *miner.Miner
+	gasPrice     *big.Int
 	Mining       bool
 	MinerThreads int
 	etherbase    common.Address
@@ -167,7 +169,7 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 	}
 
 	eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.engine)
-	eth.miner.SetGasPrice(config.GasPrice)
+	eth.gasPrice = config.GasPrice
 	eth.miner.SetExtra(makeExtraData(config.ExtraData))
 
 	eth.ApiBackend = &EthApiBackend{eth, nil}

eth/config.go

@@ -42,7 +42,7 @@ var DefaultConfig = Config{
 	NetworkId:            1,
 	LightPeers:           20,
 	DatabaseCache:        128,
-	GasPrice:             big.NewInt(20 * params.Shannon),
+	GasPrice:             big.NewInt(18 * params.Shannon),
 
 	GPO: gasprice.Config{
 		Blocks:     10,