Lo6165 price bump cap

pkg/client/client.go

@@ -47,12 +47,16 @@ func NewETHClient(endpoint string, opts ...Option) (*ETHClient, error) {
 	if err != nil {
 		return nil, err
 	}
+	return NewETHClientWith(ethclient.NewClient(rpcClient), opts...)
+}
+
+func NewETHClientWith(cli *ethclient.Client, opts ...Option) (*ETHClient, error) {
 	opt := DefaultOption()
 	for _, o := range opts {
 		o(opt)
 	}
 	return &ETHClient{
-		Client: ethclient.NewClient(rpcClient),
+		Client: cli,
 		option: *opt,
 	}, nil
 }

pkg/client/txpool/txpool.go

@@ -82,12 +82,12 @@ func inclByPercent(n *big.Int, percent uint64) {
 }
 
 // GetMinimumRequiredFee returns the minimum fee required to successfully send a transaction
-func GetMinimumRequiredFee(ctx context.Context, client *ethclient.Client, address common.Address, nonce uint64, priceBump uint64) (*big.Int, *big.Int, error) {
+func GetMinimumRequiredFee(ctx context.Context, client *ethclient.Client, address common.Address, nonce uint64, priceBump uint64) (*RPCTransaction, *big.Int, *big.Int, error) {
 	pendingTxs, err := PendingTransactions(ctx, client, address)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, nil, err
 	} else if len(pendingTxs) == 0 {
-		return common.Big0, common.Big0, nil
+		return nil, common.Big0, common.Big0, nil
 	}
 
 	var targetTx *RPCTransaction
@@ -98,14 +98,14 @@ func GetMinimumRequiredFee(ctx context.Context, client *ethclient.Client, addres
 		}
 	}
 	if targetTx == nil {
-		return common.Big0, common.Big0, nil
+		return nil, common.Big0, common.Big0, nil
 	}
 
-	gasFeeCap := targetTx.GasFeeCap.ToInt()
-	gasTipCap := targetTx.GasTipCap.ToInt()
+	gasFeeCap := new(big.Int).Set(targetTx.GasFeeCap.ToInt())
+	gasTipCap := new(big.Int).Set(targetTx.GasTipCap.ToInt())
 
 	inclByPercent(gasFeeCap, priceBump)
 	inclByPercent(gasTipCap, priceBump)
 
-	return gasFeeCap, gasTipCap, nil
+	return targetTx, gasFeeCap, gasTipCap, nil
 }

pkg/client/txpool/txpool_test.go

@@ -76,8 +76,10 @@ func transfer(t *testing.T, ctx context.Context, client *ethclient.Client, signe
 func replace(t *testing.T, ctx context.Context, client *ethclient.Client, signer types.Signer, key *ecdsa.PrivateKey, priceBump uint64, nonce uint64, gasTipCap, gasFeeCap *big.Int, to common.Address, amount *big.Int) {
 	addr := crypto.PubkeyToAddress(key.PublicKey)
 
-	if minFeeCap, minTipCap, err := GetMinimumRequiredFee(ctx, client, addr, nonce, priceBump); err != nil {
+	if tx, minFeeCap, minTipCap, err := GetMinimumRequiredFee(ctx, client, addr, nonce, priceBump); err != nil {
 		t.Fatalf("failed to get the minimum fee required to replace tx: err=%v", err)
+	} else if tx == nil {
+		t.Fatalf("replacing tx is not found")
 	} else if minFeeCap.Cmp(common.Big0) == 0 {
 		t.Fatalf("tx to replace not found")
 	} else {

pkg/relay/ethereum/chain.go

@@ -43,7 +43,7 @@ type Chain struct {
 	codec            codec.ProtoCodecMarshaler
 	msgEventListener core.MsgEventListener
 
-	client     *client.ETHClient
+	client     *ChainClient // TODO: use IChainClient after defining all methods in the interface
 	ibcHandler *ibchandler.Ibchandler
 	multicall3 *multicall3.Multicall3
 
@@ -117,7 +117,7 @@ func NewChain(config ChainConfig) (*Chain, error) {
 
 	return &Chain{
 		config:  config,
-		client:  client,
+		client:  &ChainClient{ ETHClient: client },
 		chainID: id,
 
 		ibcHandler: ibcHandler,
@@ -192,7 +192,7 @@ func (c *Chain) Codec() codec.ProtoCodecMarshaler {
 
 // Client returns the RPC client for ethereum
 func (c *Chain) Client() *client.ETHClient {
-	return c.client
+	return c.client.ETHClient
 }
 
 // SetRelayInfo sets source's path and counterparty's info to the chain

pkg/relay/ethereum/client.go

@@ -4,7 +4,12 @@ import (
 	"context"
 	"math/big"
 
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+
+	"github.com/datachainlab/ethereum-ibc-relay-chain/pkg/client"
+	"github.com/datachainlab/ethereum-ibc-relay-chain/pkg/client/txpool"
 )
 
 func (chain *Chain) CallOpts(ctx context.Context, height int64) *bind.CallOpts {
@@ -26,10 +31,6 @@ func (chain *Chain) TxOpts(ctx context.Context, useLatestNonce bool) (*bind.Tran
 		Signer: chain.ethereumSigner.Sign,
 	}
 
-	if err := NewGasFeeCalculator(chain.client, &chain.config).Apply(ctx, txOpts); err != nil {
-		return nil, err
-	}
-
 	if useLatestNonce {
 		if nonce, err := chain.client.NonceAt(ctx, addr, nil); err != nil {
 			return nil, err
@@ -38,5 +39,26 @@ func (chain *Chain) TxOpts(ctx context.Context, useLatestNonce bool) (*bind.Tran
 		}
 	}
 
+	if err := NewGasFeeCalculator(chain.client, &chain.config).Apply(ctx, txOpts); err != nil {
+		return nil, err
+	}
+
 	return txOpts, nil
 }
+
+// wrapping interface of client.ETHClient struct
+type IChainClient interface {
+	ethereum.ChainReader
+	ethereum.GasPricer
+	ethereum.FeeHistoryReader
+
+	GetMinimumRequiredFee(ctx context.Context, address common.Address, nonce uint64, priceBump uint64) (*txpool.RPCTransaction, *big.Int, *big.Int, error);
+}
+
+type ChainClient struct {
+	*client.ETHClient
+}
+
+func (cl *ChainClient) GetMinimumRequiredFee(ctx context.Context, address common.Address, nonce uint64, priceBump uint64) (*txpool.RPCTransaction, *big.Int, *big.Int, error) {
+	return txpool.GetMinimumRequiredFee(ctx, cl.ETHClient.Client, address, nonce, priceBump);
+}

pkg/relay/ethereum/gas.go

@@ -5,19 +5,18 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/datachainlab/ethereum-ibc-relay-chain/pkg/client"
 	"github.com/datachainlab/ethereum-ibc-relay-chain/pkg/client/txpool"
 	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
 )
 
 type GasFeeCalculator struct {
-	client *client.ETHClient
+	client IChainClient
 	config *ChainConfig
 }
 
-func NewGasFeeCalculator(client *client.ETHClient, config *ChainConfig) *GasFeeCalculator {
+func NewGasFeeCalculator(client IChainClient, config *ChainConfig) *GasFeeCalculator {
 	return &GasFeeCalculator{
 		client: client,
 		config: config,
@@ -27,19 +26,22 @@ func NewGasFeeCalculator(client *client.ETHClient, config *ChainConfig) *GasFeeC
 func (m *GasFeeCalculator) Apply(ctx context.Context, txOpts *bind.TransactOpts) error {
 	minFeeCap := common.Big0
 	minTipCap := common.Big0
+	var oldTx *txpool.RPCTransaction
 	if m.config.PriceBump > 0 && txOpts.Nonce != nil {
 		var err error
-		if minFeeCap, minTipCap, err = txpool.GetMinimumRequiredFee(ctx, m.client.Client, txOpts.From, txOpts.Nonce.Uint64(), m.config.PriceBump); err != nil {
+		if oldTx, minFeeCap, minTipCap, err = m.client.GetMinimumRequiredFee(ctx, txOpts.From, txOpts.Nonce.Uint64(), m.config.PriceBump); err != nil {
 			return err
 		}
 	}
-
 	switch m.config.TxType {
 	case TxTypeLegacy:
 		gasPrice, err := m.client.SuggestGasPrice(ctx)
 		if err != nil {
 			return fmt.Errorf("failed to suggest gas price: %v", err)
 		}
+		if oldTx != nil && oldTx.GasPrice != nil && oldTx.GasPrice.ToInt().Cmp(gasPrice) > 0 {
+			return fmt.Errorf("old tx's gasPrice(%v) is higher than suggestion(%v)", oldTx.GasPrice.ToInt(), gasPrice)
+		}
 		if gasPrice.Cmp(minFeeCap) < 0 {
 			gasPrice = minFeeCap
 		}
@@ -52,6 +54,9 @@ func (m *GasFeeCalculator) Apply(ctx context.Context, txOpts *bind.TransactOpts)
 		}
 		// GasTipCap = min(LimitPriorityFeePerGas, simulated_eth_maxPriorityFeePerGas * PriorityFeeRate)
 		m.config.DynamicTxGasConfig.PriorityFeeRate.Mul(gasTipCap)
+		if oldTx != nil && oldTx.GasTipCap != nil && oldTx.GasTipCap.ToInt().Cmp(gasTipCap) > 0 {
+			return fmt.Errorf("old tx's gasTipCap(%v) is higher than suggestion(%v)", oldTx.GasTipCap.ToInt(), gasTipCap)
+		}
 		if gasTipCap.Cmp(minTipCap) < 0 {
 			gasTipCap = minTipCap
 		}
@@ -61,6 +66,9 @@ func (m *GasFeeCalculator) Apply(ctx context.Context, txOpts *bind.TransactOpts)
 		// GasFeeCap = min(LimitFeePerGas, GasTipCap + BaseFee * BaseFeeRate)
 		m.config.DynamicTxGasConfig.BaseFeeRate.Mul(gasFeeCap)
 		gasFeeCap.Add(gasFeeCap, gasTipCap)
+		if oldTx != nil && oldTx.GasFeeCap != nil && oldTx.GasFeeCap.ToInt().Cmp(gasFeeCap) > 0 {
+			return fmt.Errorf("old tx's gasFeeCap(%v) is higher than suggestion(%v)", oldTx.GasFeeCap.ToInt(), gasFeeCap)
+		}
 		if gasFeeCap.Cmp(minFeeCap) < 0 {
 			gasFeeCap = minFeeCap
 		}